Index: node_modules/d3/LICENSE
===================================================================
--- node_modules/d3/LICENSE (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3/LICENSE (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,13 @@
+Copyright 2010-2023 Mike Bostock
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
Index: node_modules/d3/README.md
===================================================================
--- node_modules/d3/README.md (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3/README.md (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,12 @@
+# D3: Data-Driven Documents
+
+
+
+**D3** (or **D3.js**) is a free, open-source JavaScript library for visualizing data. Its low-level approach built on web standards offers unparalleled flexibility in authoring dynamic, data-driven graphics. For more than a decade D3 has powered groundbreaking and award-winning visualizations, become a foundational building block of higher-level chart libraries, and fostered a vibrant community of data practitioners around the world.
+
+## Resources
+
+* [Documentation](https://d3js.org)
+* [Examples](https://observablehq.com/@d3/gallery)
+* [Releases](https://github.com/d3/d3/releases)
+* [Getting help](https://d3js.org/community)
Index: node_modules/d3/dist/d3.js
===================================================================
--- node_modules/d3/dist/d3.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3/dist/d3.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,20625 @@
+// https://d3js.org v7.9.0 Copyright 2010-2023 Mike Bostock
+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+typeof define === 'function' && define.amd ? define(['exports'], factory) :
+(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.d3 = global.d3 || {}));
+})(this, (function (exports) { 'use strict';
+
+var version = "7.9.0";
+
+function ascending$3(a, b) {
+ return a == null || b == null ? NaN : a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+}
+
+function descending$2(a, b) {
+ return a == null || b == null ? NaN
+ : b < a ? -1
+ : b > a ? 1
+ : b >= a ? 0
+ : NaN;
+}
+
+function bisector(f) {
+ let compare1, compare2, delta;
+
+ // If an accessor is specified, promote it to a comparator. In this case we
+ // can test whether the search value is (self-) comparable. We can’t do this
+ // for a comparator (except for specific, known comparators) because we can’t
+ // tell if the comparator is symmetric, and an asymmetric comparator can’t be
+ // used to test whether a single value is comparable.
+ if (f.length !== 2) {
+ compare1 = ascending$3;
+ compare2 = (d, x) => ascending$3(f(d), x);
+ delta = (d, x) => f(d) - x;
+ } else {
+ compare1 = f === ascending$3 || f === descending$2 ? f : zero$1;
+ compare2 = f;
+ delta = f;
+ }
+
+ function left(a, x, lo = 0, hi = a.length) {
+ if (lo < hi) {
+ if (compare1(x, x) !== 0) return hi;
+ do {
+ const mid = (lo + hi) >>> 1;
+ if (compare2(a[mid], x) < 0) lo = mid + 1;
+ else hi = mid;
+ } while (lo < hi);
+ }
+ return lo;
+ }
+
+ function right(a, x, lo = 0, hi = a.length) {
+ if (lo < hi) {
+ if (compare1(x, x) !== 0) return hi;
+ do {
+ const mid = (lo + hi) >>> 1;
+ if (compare2(a[mid], x) <= 0) lo = mid + 1;
+ else hi = mid;
+ } while (lo < hi);
+ }
+ return lo;
+ }
+
+ function center(a, x, lo = 0, hi = a.length) {
+ const i = left(a, x, lo, hi - 1);
+ return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
+ }
+
+ return {left, center, right};
+}
+
+function zero$1() {
+ return 0;
+}
+
+function number$3(x) {
+ return x === null ? NaN : +x;
+}
+
+function* numbers(values, valueof) {
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value != null && (value = +value) >= value) {
+ yield value;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
+ yield value;
+ }
+ }
+ }
+}
+
+const ascendingBisect = bisector(ascending$3);
+const bisectRight = ascendingBisect.right;
+const bisectLeft = ascendingBisect.left;
+const bisectCenter = bisector(number$3).center;
+var bisect = bisectRight;
+
+function blur(values, r) {
+ if (!((r = +r) >= 0)) throw new RangeError("invalid r");
+ let length = values.length;
+ if (!((length = Math.floor(length)) >= 0)) throw new RangeError("invalid length");
+ if (!length || !r) return values;
+ const blur = blurf(r);
+ const temp = values.slice();
+ blur(values, temp, 0, length, 1);
+ blur(temp, values, 0, length, 1);
+ blur(values, temp, 0, length, 1);
+ return values;
+}
+
+const blur2 = Blur2(blurf);
+
+const blurImage = Blur2(blurfImage);
+
+function Blur2(blur) {
+ return function(data, rx, ry = rx) {
+ if (!((rx = +rx) >= 0)) throw new RangeError("invalid rx");
+ if (!((ry = +ry) >= 0)) throw new RangeError("invalid ry");
+ let {data: values, width, height} = data;
+ if (!((width = Math.floor(width)) >= 0)) throw new RangeError("invalid width");
+ if (!((height = Math.floor(height !== undefined ? height : values.length / width)) >= 0)) throw new RangeError("invalid height");
+ if (!width || !height || (!rx && !ry)) return data;
+ const blurx = rx && blur(rx);
+ const blury = ry && blur(ry);
+ const temp = values.slice();
+ if (blurx && blury) {
+ blurh(blurx, temp, values, width, height);
+ blurh(blurx, values, temp, width, height);
+ blurh(blurx, temp, values, width, height);
+ blurv(blury, values, temp, width, height);
+ blurv(blury, temp, values, width, height);
+ blurv(blury, values, temp, width, height);
+ } else if (blurx) {
+ blurh(blurx, values, temp, width, height);
+ blurh(blurx, temp, values, width, height);
+ blurh(blurx, values, temp, width, height);
+ } else if (blury) {
+ blurv(blury, values, temp, width, height);
+ blurv(blury, temp, values, width, height);
+ blurv(blury, values, temp, width, height);
+ }
+ return data;
+ };
+}
+
+function blurh(blur, T, S, w, h) {
+ for (let y = 0, n = w * h; y < n;) {
+ blur(T, S, y, y += w, 1);
+ }
+}
+
+function blurv(blur, T, S, w, h) {
+ for (let x = 0, n = w * h; x < w; ++x) {
+ blur(T, S, x, x + n, w);
+ }
+}
+
+function blurfImage(radius) {
+ const blur = blurf(radius);
+ return (T, S, start, stop, step) => {
+ start <<= 2, stop <<= 2, step <<= 2;
+ blur(T, S, start + 0, stop + 0, step);
+ blur(T, S, start + 1, stop + 1, step);
+ blur(T, S, start + 2, stop + 2, step);
+ blur(T, S, start + 3, stop + 3, step);
+ };
+}
+
+// Given a target array T, a source array S, sets each value T[i] to the average
+// of {S[i - r], …, S[i], …, S[i + r]}, where r = ⌊radius⌋, start <= i < stop,
+// for each i, i + step, i + 2 * step, etc., and where S[j] is clamped between
+// S[start] (inclusive) and S[stop] (exclusive). If the given radius is not an
+// integer, S[i - r - 1] and S[i + r + 1] are added to the sum, each weighted
+// according to r - ⌊radius⌋.
+function blurf(radius) {
+ const radius0 = Math.floor(radius);
+ if (radius0 === radius) return bluri(radius);
+ const t = radius - radius0;
+ const w = 2 * radius + 1;
+ return (T, S, start, stop, step) => { // stop must be aligned!
+ if (!((stop -= step) >= start)) return; // inclusive stop
+ let sum = radius0 * S[start];
+ const s0 = step * radius0;
+ const s1 = s0 + step;
+ for (let i = start, j = start + s0; i < j; i += step) {
+ sum += S[Math.min(stop, i)];
+ }
+ for (let i = start, j = stop; i <= j; i += step) {
+ sum += S[Math.min(stop, i + s0)];
+ T[i] = (sum + t * (S[Math.max(start, i - s1)] + S[Math.min(stop, i + s1)])) / w;
+ sum -= S[Math.max(start, i - s0)];
+ }
+ };
+}
+
+// Like blurf, but optimized for integer radius.
+function bluri(radius) {
+ const w = 2 * radius + 1;
+ return (T, S, start, stop, step) => { // stop must be aligned!
+ if (!((stop -= step) >= start)) return; // inclusive stop
+ let sum = radius * S[start];
+ const s = step * radius;
+ for (let i = start, j = start + s; i < j; i += step) {
+ sum += S[Math.min(stop, i)];
+ }
+ for (let i = start, j = stop; i <= j; i += step) {
+ sum += S[Math.min(stop, i + s)];
+ T[i] = sum / w;
+ sum -= S[Math.max(start, i - s)];
+ }
+ };
+}
+
+function count$1(values, valueof) {
+ let count = 0;
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value != null && (value = +value) >= value) {
+ ++count;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
+ ++count;
+ }
+ }
+ }
+ return count;
+}
+
+function length$3(array) {
+ return array.length | 0;
+}
+
+function empty$2(length) {
+ return !(length > 0);
+}
+
+function arrayify(values) {
+ return typeof values !== "object" || "length" in values ? values : Array.from(values);
+}
+
+function reducer(reduce) {
+ return values => reduce(...values);
+}
+
+function cross$2(...values) {
+ const reduce = typeof values[values.length - 1] === "function" && reducer(values.pop());
+ values = values.map(arrayify);
+ const lengths = values.map(length$3);
+ const j = values.length - 1;
+ const index = new Array(j + 1).fill(0);
+ const product = [];
+ if (j < 0 || lengths.some(empty$2)) return product;
+ while (true) {
+ product.push(index.map((j, i) => values[i][j]));
+ let i = j;
+ while (++index[i] === lengths[i]) {
+ if (i === 0) return reduce ? product.map(reduce) : product;
+ index[i--] = 0;
+ }
+ }
+}
+
+function cumsum(values, valueof) {
+ var sum = 0, index = 0;
+ return Float64Array.from(values, valueof === undefined
+ ? v => (sum += +v || 0)
+ : v => (sum += +valueof(v, index++, values) || 0));
+}
+
+function variance(values, valueof) {
+ let count = 0;
+ let delta;
+ let mean = 0;
+ let sum = 0;
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value != null && (value = +value) >= value) {
+ delta = value - mean;
+ mean += delta / ++count;
+ sum += delta * (value - mean);
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
+ delta = value - mean;
+ mean += delta / ++count;
+ sum += delta * (value - mean);
+ }
+ }
+ }
+ if (count > 1) return sum / (count - 1);
+}
+
+function deviation(values, valueof) {
+ const v = variance(values, valueof);
+ return v ? Math.sqrt(v) : v;
+}
+
+function extent$1(values, valueof) {
+ let min;
+ let max;
+ if (valueof === undefined) {
+ for (const value of values) {
+ if (value != null) {
+ if (min === undefined) {
+ if (value >= value) min = max = value;
+ } else {
+ if (min > value) min = value;
+ if (max < value) max = value;
+ }
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null) {
+ if (min === undefined) {
+ if (value >= value) min = max = value;
+ } else {
+ if (min > value) min = value;
+ if (max < value) max = value;
+ }
+ }
+ }
+ }
+ return [min, max];
+}
+
+// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+class Adder {
+ constructor() {
+ this._partials = new Float64Array(32);
+ this._n = 0;
+ }
+ add(x) {
+ const p = this._partials;
+ let i = 0;
+ for (let j = 0; j < this._n && j < 32; j++) {
+ const y = p[j],
+ hi = x + y,
+ lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
+ if (lo) p[i++] = lo;
+ x = hi;
+ }
+ p[i] = x;
+ this._n = i + 1;
+ return this;
+ }
+ valueOf() {
+ const p = this._partials;
+ let n = this._n, x, y, lo, hi = 0;
+ if (n > 0) {
+ hi = p[--n];
+ while (n > 0) {
+ x = hi;
+ y = p[--n];
+ hi = x + y;
+ lo = y - (hi - x);
+ if (lo) break;
+ }
+ if (n > 0 && ((lo < 0 && p[n - 1] < 0) || (lo > 0 && p[n - 1] > 0))) {
+ y = lo * 2;
+ x = hi + y;
+ if (y == x - hi) hi = x;
+ }
+ }
+ return hi;
+ }
+}
+
+function fsum(values, valueof) {
+ const adder = new Adder();
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value = +value) {
+ adder.add(value);
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if (value = +valueof(value, ++index, values)) {
+ adder.add(value);
+ }
+ }
+ }
+ return +adder;
+}
+
+function fcumsum(values, valueof) {
+ const adder = new Adder();
+ let index = -1;
+ return Float64Array.from(values, valueof === undefined
+ ? v => adder.add(+v || 0)
+ : v => adder.add(+valueof(v, ++index, values) || 0)
+ );
+}
+
+class InternMap extends Map {
+ constructor(entries, key = keyof) {
+ super();
+ Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
+ if (entries != null) for (const [key, value] of entries) this.set(key, value);
+ }
+ get(key) {
+ return super.get(intern_get(this, key));
+ }
+ has(key) {
+ return super.has(intern_get(this, key));
+ }
+ set(key, value) {
+ return super.set(intern_set(this, key), value);
+ }
+ delete(key) {
+ return super.delete(intern_delete(this, key));
+ }
+}
+
+class InternSet extends Set {
+ constructor(values, key = keyof) {
+ super();
+ Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
+ if (values != null) for (const value of values) this.add(value);
+ }
+ has(value) {
+ return super.has(intern_get(this, value));
+ }
+ add(value) {
+ return super.add(intern_set(this, value));
+ }
+ delete(value) {
+ return super.delete(intern_delete(this, value));
+ }
+}
+
+function intern_get({_intern, _key}, value) {
+ const key = _key(value);
+ return _intern.has(key) ? _intern.get(key) : value;
+}
+
+function intern_set({_intern, _key}, value) {
+ const key = _key(value);
+ if (_intern.has(key)) return _intern.get(key);
+ _intern.set(key, value);
+ return value;
+}
+
+function intern_delete({_intern, _key}, value) {
+ const key = _key(value);
+ if (_intern.has(key)) {
+ value = _intern.get(key);
+ _intern.delete(key);
+ }
+ return value;
+}
+
+function keyof(value) {
+ return value !== null && typeof value === "object" ? value.valueOf() : value;
+}
+
+function identity$9(x) {
+ return x;
+}
+
+function group(values, ...keys) {
+ return nest(values, identity$9, identity$9, keys);
+}
+
+function groups(values, ...keys) {
+ return nest(values, Array.from, identity$9, keys);
+}
+
+function flatten$1(groups, keys) {
+ for (let i = 1, n = keys.length; i < n; ++i) {
+ groups = groups.flatMap(g => g.pop().map(([key, value]) => [...g, key, value]));
+ }
+ return groups;
+}
+
+function flatGroup(values, ...keys) {
+ return flatten$1(groups(values, ...keys), keys);
+}
+
+function flatRollup(values, reduce, ...keys) {
+ return flatten$1(rollups(values, reduce, ...keys), keys);
+}
+
+function rollup(values, reduce, ...keys) {
+ return nest(values, identity$9, reduce, keys);
+}
+
+function rollups(values, reduce, ...keys) {
+ return nest(values, Array.from, reduce, keys);
+}
+
+function index$4(values, ...keys) {
+ return nest(values, identity$9, unique, keys);
+}
+
+function indexes(values, ...keys) {
+ return nest(values, Array.from, unique, keys);
+}
+
+function unique(values) {
+ if (values.length !== 1) throw new Error("duplicate key");
+ return values[0];
+}
+
+function nest(values, map, reduce, keys) {
+ return (function regroup(values, i) {
+ if (i >= keys.length) return reduce(values);
+ const groups = new InternMap();
+ const keyof = keys[i++];
+ let index = -1;
+ for (const value of values) {
+ const key = keyof(value, ++index, values);
+ const group = groups.get(key);
+ if (group) group.push(value);
+ else groups.set(key, [value]);
+ }
+ for (const [key, values] of groups) {
+ groups.set(key, regroup(values, i));
+ }
+ return map(groups);
+ })(values, 0);
+}
+
+function permute(source, keys) {
+ return Array.from(keys, key => source[key]);
+}
+
+function sort(values, ...F) {
+ if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable");
+ values = Array.from(values);
+ let [f] = F;
+ if ((f && f.length !== 2) || F.length > 1) {
+ const index = Uint32Array.from(values, (d, i) => i);
+ if (F.length > 1) {
+ F = F.map(f => values.map(f));
+ index.sort((i, j) => {
+ for (const f of F) {
+ const c = ascendingDefined(f[i], f[j]);
+ if (c) return c;
+ }
+ });
+ } else {
+ f = values.map(f);
+ index.sort((i, j) => ascendingDefined(f[i], f[j]));
+ }
+ return permute(values, index);
+ }
+ return values.sort(compareDefined(f));
+}
+
+function compareDefined(compare = ascending$3) {
+ if (compare === ascending$3) return ascendingDefined;
+ if (typeof compare !== "function") throw new TypeError("compare is not a function");
+ return (a, b) => {
+ const x = compare(a, b);
+ if (x || x === 0) return x;
+ return (compare(b, b) === 0) - (compare(a, a) === 0);
+ };
+}
+
+function ascendingDefined(a, b) {
+ return (a == null || !(a >= a)) - (b == null || !(b >= b)) || (a < b ? -1 : a > b ? 1 : 0);
+}
+
+function groupSort(values, reduce, key) {
+ return (reduce.length !== 2
+ ? sort(rollup(values, reduce, key), (([ak, av], [bk, bv]) => ascending$3(av, bv) || ascending$3(ak, bk)))
+ : sort(group(values, key), (([ak, av], [bk, bv]) => reduce(av, bv) || ascending$3(ak, bk))))
+ .map(([key]) => key);
+}
+
+var array$5 = Array.prototype;
+
+var slice$3 = array$5.slice;
+
+function constant$b(x) {
+ return () => x;
+}
+
+const e10 = Math.sqrt(50),
+ e5 = Math.sqrt(10),
+ e2 = Math.sqrt(2);
+
+function tickSpec(start, stop, count) {
+ const step = (stop - start) / Math.max(0, count),
+ power = Math.floor(Math.log10(step)),
+ error = step / Math.pow(10, power),
+ factor = error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1;
+ let i1, i2, inc;
+ if (power < 0) {
+ inc = Math.pow(10, -power) / factor;
+ i1 = Math.round(start * inc);
+ i2 = Math.round(stop * inc);
+ if (i1 / inc < start) ++i1;
+ if (i2 / inc > stop) --i2;
+ inc = -inc;
+ } else {
+ inc = Math.pow(10, power) * factor;
+ i1 = Math.round(start / inc);
+ i2 = Math.round(stop / inc);
+ if (i1 * inc < start) ++i1;
+ if (i2 * inc > stop) --i2;
+ }
+ if (i2 < i1 && 0.5 <= count && count < 2) return tickSpec(start, stop, count * 2);
+ return [i1, i2, inc];
+}
+
+function ticks(start, stop, count) {
+ stop = +stop, start = +start, count = +count;
+ if (!(count > 0)) return [];
+ if (start === stop) return [start];
+ const reverse = stop < start, [i1, i2, inc] = reverse ? tickSpec(stop, start, count) : tickSpec(start, stop, count);
+ if (!(i2 >= i1)) return [];
+ const n = i2 - i1 + 1, ticks = new Array(n);
+ if (reverse) {
+ if (inc < 0) for (let i = 0; i < n; ++i) ticks[i] = (i2 - i) / -inc;
+ else for (let i = 0; i < n; ++i) ticks[i] = (i2 - i) * inc;
+ } else {
+ if (inc < 0) for (let i = 0; i < n; ++i) ticks[i] = (i1 + i) / -inc;
+ else for (let i = 0; i < n; ++i) ticks[i] = (i1 + i) * inc;
+ }
+ return ticks;
+}
+
+function tickIncrement(start, stop, count) {
+ stop = +stop, start = +start, count = +count;
+ return tickSpec(start, stop, count)[2];
+}
+
+function tickStep(start, stop, count) {
+ stop = +stop, start = +start, count = +count;
+ const reverse = stop < start, inc = reverse ? tickIncrement(stop, start, count) : tickIncrement(start, stop, count);
+ return (reverse ? -1 : 1) * (inc < 0 ? 1 / -inc : inc);
+}
+
+function nice$1(start, stop, count) {
+ let prestep;
+ while (true) {
+ const step = tickIncrement(start, stop, count);
+ if (step === prestep || step === 0 || !isFinite(step)) {
+ return [start, stop];
+ } else if (step > 0) {
+ start = Math.floor(start / step) * step;
+ stop = Math.ceil(stop / step) * step;
+ } else if (step < 0) {
+ start = Math.ceil(start * step) / step;
+ stop = Math.floor(stop * step) / step;
+ }
+ prestep = step;
+ }
+}
+
+function thresholdSturges(values) {
+ return Math.max(1, Math.ceil(Math.log(count$1(values)) / Math.LN2) + 1);
+}
+
+function bin() {
+ var value = identity$9,
+ domain = extent$1,
+ threshold = thresholdSturges;
+
+ function histogram(data) {
+ if (!Array.isArray(data)) data = Array.from(data);
+
+ var i,
+ n = data.length,
+ x,
+ step,
+ values = new Array(n);
+
+ for (i = 0; i < n; ++i) {
+ values[i] = value(data[i], i, data);
+ }
+
+ var xz = domain(values),
+ x0 = xz[0],
+ x1 = xz[1],
+ tz = threshold(values, x0, x1);
+
+ // Convert number of thresholds into uniform thresholds, and nice the
+ // default domain accordingly.
+ if (!Array.isArray(tz)) {
+ const max = x1, tn = +tz;
+ if (domain === extent$1) [x0, x1] = nice$1(x0, x1, tn);
+ tz = ticks(x0, x1, tn);
+
+ // If the domain is aligned with the first tick (which it will by
+ // default), then we can use quantization rather than bisection to bin
+ // values, which is substantially faster.
+ if (tz[0] <= x0) step = tickIncrement(x0, x1, tn);
+
+ // If the last threshold is coincident with the domain’s upper bound, the
+ // last bin will be zero-width. If the default domain is used, and this
+ // last threshold is coincident with the maximum input value, we can
+ // extend the niced upper bound by one tick to ensure uniform bin widths;
+ // otherwise, we simply remove the last threshold. Note that we don’t
+ // coerce values or the domain to numbers, and thus must be careful to
+ // compare order (>=) rather than strict equality (===)!
+ if (tz[tz.length - 1] >= x1) {
+ if (max >= x1 && domain === extent$1) {
+ const step = tickIncrement(x0, x1, tn);
+ if (isFinite(step)) {
+ if (step > 0) {
+ x1 = (Math.floor(x1 / step) + 1) * step;
+ } else if (step < 0) {
+ x1 = (Math.ceil(x1 * -step) + 1) / -step;
+ }
+ }
+ } else {
+ tz.pop();
+ }
+ }
+ }
+
+ // Remove any thresholds outside the domain.
+ // Be careful not to mutate an array owned by the user!
+ var m = tz.length, a = 0, b = m;
+ while (tz[a] <= x0) ++a;
+ while (tz[b - 1] > x1) --b;
+ if (a || b < m) tz = tz.slice(a, b), m = b - a;
+
+ var bins = new Array(m + 1),
+ bin;
+
+ // Initialize bins.
+ for (i = 0; i <= m; ++i) {
+ bin = bins[i] = [];
+ bin.x0 = i > 0 ? tz[i - 1] : x0;
+ bin.x1 = i < m ? tz[i] : x1;
+ }
+
+ // Assign data to bins by value, ignoring any outside the domain.
+ if (isFinite(step)) {
+ if (step > 0) {
+ for (i = 0; i < n; ++i) {
+ if ((x = values[i]) != null && x0 <= x && x <= x1) {
+ bins[Math.min(m, Math.floor((x - x0) / step))].push(data[i]);
+ }
+ }
+ } else if (step < 0) {
+ for (i = 0; i < n; ++i) {
+ if ((x = values[i]) != null && x0 <= x && x <= x1) {
+ const j = Math.floor((x0 - x) * step);
+ bins[Math.min(m, j + (tz[j] <= x))].push(data[i]); // handle off-by-one due to rounding
+ }
+ }
+ }
+ } else {
+ for (i = 0; i < n; ++i) {
+ if ((x = values[i]) != null && x0 <= x && x <= x1) {
+ bins[bisect(tz, x, 0, m)].push(data[i]);
+ }
+ }
+ }
+
+ return bins;
+ }
+
+ histogram.value = function(_) {
+ return arguments.length ? (value = typeof _ === "function" ? _ : constant$b(_), histogram) : value;
+ };
+
+ histogram.domain = function(_) {
+ return arguments.length ? (domain = typeof _ === "function" ? _ : constant$b([_[0], _[1]]), histogram) : domain;
+ };
+
+ histogram.thresholds = function(_) {
+ return arguments.length ? (threshold = typeof _ === "function" ? _ : constant$b(Array.isArray(_) ? slice$3.call(_) : _), histogram) : threshold;
+ };
+
+ return histogram;
+}
+
+function max$3(values, valueof) {
+ let max;
+ if (valueof === undefined) {
+ for (const value of values) {
+ if (value != null
+ && (max < value || (max === undefined && value >= value))) {
+ max = value;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null
+ && (max < value || (max === undefined && value >= value))) {
+ max = value;
+ }
+ }
+ }
+ return max;
+}
+
+function maxIndex(values, valueof) {
+ let max;
+ let maxIndex = -1;
+ let index = -1;
+ if (valueof === undefined) {
+ for (const value of values) {
+ ++index;
+ if (value != null
+ && (max < value || (max === undefined && value >= value))) {
+ max = value, maxIndex = index;
+ }
+ }
+ } else {
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null
+ && (max < value || (max === undefined && value >= value))) {
+ max = value, maxIndex = index;
+ }
+ }
+ }
+ return maxIndex;
+}
+
+function min$2(values, valueof) {
+ let min;
+ if (valueof === undefined) {
+ for (const value of values) {
+ if (value != null
+ && (min > value || (min === undefined && value >= value))) {
+ min = value;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null
+ && (min > value || (min === undefined && value >= value))) {
+ min = value;
+ }
+ }
+ }
+ return min;
+}
+
+function minIndex(values, valueof) {
+ let min;
+ let minIndex = -1;
+ let index = -1;
+ if (valueof === undefined) {
+ for (const value of values) {
+ ++index;
+ if (value != null
+ && (min > value || (min === undefined && value >= value))) {
+ min = value, minIndex = index;
+ }
+ }
+ } else {
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null
+ && (min > value || (min === undefined && value >= value))) {
+ min = value, minIndex = index;
+ }
+ }
+ }
+ return minIndex;
+}
+
+// Based on https://github.com/mourner/quickselect
+// ISC license, Copyright 2018 Vladimir Agafonkin.
+function quickselect(array, k, left = 0, right = Infinity, compare) {
+ k = Math.floor(k);
+ left = Math.floor(Math.max(0, left));
+ right = Math.floor(Math.min(array.length - 1, right));
+
+ if (!(left <= k && k <= right)) return array;
+
+ compare = compare === undefined ? ascendingDefined : compareDefined(compare);
+
+ while (right > left) {
+ if (right - left > 600) {
+ const n = right - left + 1;
+ const m = k - left + 1;
+ const z = Math.log(n);
+ const s = 0.5 * Math.exp(2 * z / 3);
+ const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+ const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+ const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+ quickselect(array, k, newLeft, newRight, compare);
+ }
+
+ const t = array[k];
+ let i = left;
+ let j = right;
+
+ swap$1(array, left, k);
+ if (compare(array[right], t) > 0) swap$1(array, left, right);
+
+ while (i < j) {
+ swap$1(array, i, j), ++i, --j;
+ while (compare(array[i], t) < 0) ++i;
+ while (compare(array[j], t) > 0) --j;
+ }
+
+ if (compare(array[left], t) === 0) swap$1(array, left, j);
+ else ++j, swap$1(array, j, right);
+
+ if (j <= k) left = j + 1;
+ if (k <= j) right = j - 1;
+ }
+
+ return array;
+}
+
+function swap$1(array, i, j) {
+ const t = array[i];
+ array[i] = array[j];
+ array[j] = t;
+}
+
+function greatest(values, compare = ascending$3) {
+ let max;
+ let defined = false;
+ if (compare.length === 1) {
+ let maxValue;
+ for (const element of values) {
+ const value = compare(element);
+ if (defined
+ ? ascending$3(value, maxValue) > 0
+ : ascending$3(value, value) === 0) {
+ max = element;
+ maxValue = value;
+ defined = true;
+ }
+ }
+ } else {
+ for (const value of values) {
+ if (defined
+ ? compare(value, max) > 0
+ : compare(value, value) === 0) {
+ max = value;
+ defined = true;
+ }
+ }
+ }
+ return max;
+}
+
+function quantile$1(values, p, valueof) {
+ values = Float64Array.from(numbers(values, valueof));
+ if (!(n = values.length) || isNaN(p = +p)) return;
+ if (p <= 0 || n < 2) return min$2(values);
+ if (p >= 1) return max$3(values);
+ var n,
+ i = (n - 1) * p,
+ i0 = Math.floor(i),
+ value0 = max$3(quickselect(values, i0).subarray(0, i0 + 1)),
+ value1 = min$2(values.subarray(i0 + 1));
+ return value0 + (value1 - value0) * (i - i0);
+}
+
+function quantileSorted(values, p, valueof = number$3) {
+ if (!(n = values.length) || isNaN(p = +p)) return;
+ if (p <= 0 || n < 2) return +valueof(values[0], 0, values);
+ if (p >= 1) return +valueof(values[n - 1], n - 1, values);
+ var n,
+ i = (n - 1) * p,
+ i0 = Math.floor(i),
+ value0 = +valueof(values[i0], i0, values),
+ value1 = +valueof(values[i0 + 1], i0 + 1, values);
+ return value0 + (value1 - value0) * (i - i0);
+}
+
+function quantileIndex(values, p, valueof = number$3) {
+ if (isNaN(p = +p)) return;
+ numbers = Float64Array.from(values, (_, i) => number$3(valueof(values[i], i, values)));
+ if (p <= 0) return minIndex(numbers);
+ if (p >= 1) return maxIndex(numbers);
+ var numbers,
+ index = Uint32Array.from(values, (_, i) => i),
+ j = numbers.length - 1,
+ i = Math.floor(j * p);
+ quickselect(index, i, 0, j, (i, j) => ascendingDefined(numbers[i], numbers[j]));
+ i = greatest(index.subarray(0, i + 1), (i) => numbers[i]);
+ return i >= 0 ? i : -1;
+}
+
+function thresholdFreedmanDiaconis(values, min, max) {
+ const c = count$1(values), d = quantile$1(values, 0.75) - quantile$1(values, 0.25);
+ return c && d ? Math.ceil((max - min) / (2 * d * Math.pow(c, -1 / 3))) : 1;
+}
+
+function thresholdScott(values, min, max) {
+ const c = count$1(values), d = deviation(values);
+ return c && d ? Math.ceil((max - min) * Math.cbrt(c) / (3.49 * d)) : 1;
+}
+
+function mean(values, valueof) {
+ let count = 0;
+ let sum = 0;
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value != null && (value = +value) >= value) {
+ ++count, sum += value;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {
+ ++count, sum += value;
+ }
+ }
+ }
+ if (count) return sum / count;
+}
+
+function median(values, valueof) {
+ return quantile$1(values, 0.5, valueof);
+}
+
+function medianIndex(values, valueof) {
+ return quantileIndex(values, 0.5, valueof);
+}
+
+function* flatten(arrays) {
+ for (const array of arrays) {
+ yield* array;
+ }
+}
+
+function merge(arrays) {
+ return Array.from(flatten(arrays));
+}
+
+function mode(values, valueof) {
+ const counts = new InternMap();
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value != null && value >= value) {
+ counts.set(value, (counts.get(value) || 0) + 1);
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if ((value = valueof(value, ++index, values)) != null && value >= value) {
+ counts.set(value, (counts.get(value) || 0) + 1);
+ }
+ }
+ }
+ let modeValue;
+ let modeCount = 0;
+ for (const [value, count] of counts) {
+ if (count > modeCount) {
+ modeCount = count;
+ modeValue = value;
+ }
+ }
+ return modeValue;
+}
+
+function pairs(values, pairof = pair) {
+ const pairs = [];
+ let previous;
+ let first = false;
+ for (const value of values) {
+ if (first) pairs.push(pairof(previous, value));
+ previous = value;
+ first = true;
+ }
+ return pairs;
+}
+
+function pair(a, b) {
+ return [a, b];
+}
+
+function range$2(start, stop, step) {
+ start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+
+ var i = -1,
+ n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+ range = new Array(n);
+
+ while (++i < n) {
+ range[i] = start + i * step;
+ }
+
+ return range;
+}
+
+function rank(values, valueof = ascending$3) {
+ if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable");
+ let V = Array.from(values);
+ const R = new Float64Array(V.length);
+ if (valueof.length !== 2) V = V.map(valueof), valueof = ascending$3;
+ const compareIndex = (i, j) => valueof(V[i], V[j]);
+ let k, r;
+ values = Uint32Array.from(V, (_, i) => i);
+ // Risky chaining due to Safari 14 https://github.com/d3/d3-array/issues/123
+ values.sort(valueof === ascending$3 ? (i, j) => ascendingDefined(V[i], V[j]) : compareDefined(compareIndex));
+ values.forEach((j, i) => {
+ const c = compareIndex(j, k === undefined ? j : k);
+ if (c >= 0) {
+ if (k === undefined || c > 0) k = j, r = i;
+ R[j] = r;
+ } else {
+ R[j] = NaN;
+ }
+ });
+ return R;
+}
+
+function least(values, compare = ascending$3) {
+ let min;
+ let defined = false;
+ if (compare.length === 1) {
+ let minValue;
+ for (const element of values) {
+ const value = compare(element);
+ if (defined
+ ? ascending$3(value, minValue) < 0
+ : ascending$3(value, value) === 0) {
+ min = element;
+ minValue = value;
+ defined = true;
+ }
+ }
+ } else {
+ for (const value of values) {
+ if (defined
+ ? compare(value, min) < 0
+ : compare(value, value) === 0) {
+ min = value;
+ defined = true;
+ }
+ }
+ }
+ return min;
+}
+
+function leastIndex(values, compare = ascending$3) {
+ if (compare.length === 1) return minIndex(values, compare);
+ let minValue;
+ let min = -1;
+ let index = -1;
+ for (const value of values) {
+ ++index;
+ if (min < 0
+ ? compare(value, value) === 0
+ : compare(value, minValue) < 0) {
+ minValue = value;
+ min = index;
+ }
+ }
+ return min;
+}
+
+function greatestIndex(values, compare = ascending$3) {
+ if (compare.length === 1) return maxIndex(values, compare);
+ let maxValue;
+ let max = -1;
+ let index = -1;
+ for (const value of values) {
+ ++index;
+ if (max < 0
+ ? compare(value, value) === 0
+ : compare(value, maxValue) > 0) {
+ maxValue = value;
+ max = index;
+ }
+ }
+ return max;
+}
+
+function scan(values, compare) {
+ const index = leastIndex(values, compare);
+ return index < 0 ? undefined : index;
+}
+
+var shuffle$1 = shuffler(Math.random);
+
+function shuffler(random) {
+ return function shuffle(array, i0 = 0, i1 = array.length) {
+ let m = i1 - (i0 = +i0);
+ while (m) {
+ const i = random() * m-- | 0, t = array[m + i0];
+ array[m + i0] = array[i + i0];
+ array[i + i0] = t;
+ }
+ return array;
+ };
+}
+
+function sum$2(values, valueof) {
+ let sum = 0;
+ if (valueof === undefined) {
+ for (let value of values) {
+ if (value = +value) {
+ sum += value;
+ }
+ }
+ } else {
+ let index = -1;
+ for (let value of values) {
+ if (value = +valueof(value, ++index, values)) {
+ sum += value;
+ }
+ }
+ }
+ return sum;
+}
+
+function transpose(matrix) {
+ if (!(n = matrix.length)) return [];
+ for (var i = -1, m = min$2(matrix, length$2), transpose = new Array(m); ++i < m;) {
+ for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
+ row[j] = matrix[j][i];
+ }
+ }
+ return transpose;
+}
+
+function length$2(d) {
+ return d.length;
+}
+
+function zip() {
+ return transpose(arguments);
+}
+
+function every(values, test) {
+ if (typeof test !== "function") throw new TypeError("test is not a function");
+ let index = -1;
+ for (const value of values) {
+ if (!test(value, ++index, values)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+function some(values, test) {
+ if (typeof test !== "function") throw new TypeError("test is not a function");
+ let index = -1;
+ for (const value of values) {
+ if (test(value, ++index, values)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+function filter$1(values, test) {
+ if (typeof test !== "function") throw new TypeError("test is not a function");
+ const array = [];
+ let index = -1;
+ for (const value of values) {
+ if (test(value, ++index, values)) {
+ array.push(value);
+ }
+ }
+ return array;
+}
+
+function map$1(values, mapper) {
+ if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable");
+ if (typeof mapper !== "function") throw new TypeError("mapper is not a function");
+ return Array.from(values, (value, index) => mapper(value, index, values));
+}
+
+function reduce(values, reducer, value) {
+ if (typeof reducer !== "function") throw new TypeError("reducer is not a function");
+ const iterator = values[Symbol.iterator]();
+ let done, next, index = -1;
+ if (arguments.length < 3) {
+ ({done, value} = iterator.next());
+ if (done) return;
+ ++index;
+ }
+ while (({done, value: next} = iterator.next()), !done) {
+ value = reducer(value, next, ++index, values);
+ }
+ return value;
+}
+
+function reverse$1(values) {
+ if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable");
+ return Array.from(values).reverse();
+}
+
+function difference(values, ...others) {
+ values = new InternSet(values);
+ for (const other of others) {
+ for (const value of other) {
+ values.delete(value);
+ }
+ }
+ return values;
+}
+
+function disjoint(values, other) {
+ const iterator = other[Symbol.iterator](), set = new InternSet();
+ for (const v of values) {
+ if (set.has(v)) return false;
+ let value, done;
+ while (({value, done} = iterator.next())) {
+ if (done) break;
+ if (Object.is(v, value)) return false;
+ set.add(value);
+ }
+ }
+ return true;
+}
+
+function intersection(values, ...others) {
+ values = new InternSet(values);
+ others = others.map(set$2);
+ out: for (const value of values) {
+ for (const other of others) {
+ if (!other.has(value)) {
+ values.delete(value);
+ continue out;
+ }
+ }
+ }
+ return values;
+}
+
+function set$2(values) {
+ return values instanceof InternSet ? values : new InternSet(values);
+}
+
+function superset(values, other) {
+ const iterator = values[Symbol.iterator](), set = new Set();
+ for (const o of other) {
+ const io = intern(o);
+ if (set.has(io)) continue;
+ let value, done;
+ while (({value, done} = iterator.next())) {
+ if (done) return false;
+ const ivalue = intern(value);
+ set.add(ivalue);
+ if (Object.is(io, ivalue)) break;
+ }
+ }
+ return true;
+}
+
+function intern(value) {
+ return value !== null && typeof value === "object" ? value.valueOf() : value;
+}
+
+function subset(values, other) {
+ return superset(other, values);
+}
+
+function union(...others) {
+ const set = new InternSet();
+ for (const other of others) {
+ for (const o of other) {
+ set.add(o);
+ }
+ }
+ return set;
+}
+
+function identity$8(x) {
+ return x;
+}
+
+var top = 1,
+ right = 2,
+ bottom = 3,
+ left = 4,
+ epsilon$6 = 1e-6;
+
+function translateX(x) {
+ return "translate(" + x + ",0)";
+}
+
+function translateY(y) {
+ return "translate(0," + y + ")";
+}
+
+function number$2(scale) {
+ return d => +scale(d);
+}
+
+function center$1(scale, offset) {
+ offset = Math.max(0, scale.bandwidth() - offset * 2) / 2;
+ if (scale.round()) offset = Math.round(offset);
+ return d => +scale(d) + offset;
+}
+
+function entering() {
+ return !this.__axis;
+}
+
+function axis(orient, scale) {
+ var tickArguments = [],
+ tickValues = null,
+ tickFormat = null,
+ tickSizeInner = 6,
+ tickSizeOuter = 6,
+ tickPadding = 3,
+ offset = typeof window !== "undefined" && window.devicePixelRatio > 1 ? 0 : 0.5,
+ k = orient === top || orient === left ? -1 : 1,
+ x = orient === left || orient === right ? "x" : "y",
+ transform = orient === top || orient === bottom ? translateX : translateY;
+
+ function axis(context) {
+ var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,
+ format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$8) : tickFormat,
+ spacing = Math.max(tickSizeInner, 0) + tickPadding,
+ range = scale.range(),
+ range0 = +range[0] + offset,
+ range1 = +range[range.length - 1] + offset,
+ position = (scale.bandwidth ? center$1 : number$2)(scale.copy(), offset),
+ selection = context.selection ? context.selection() : context,
+ path = selection.selectAll(".domain").data([null]),
+ tick = selection.selectAll(".tick").data(values, scale).order(),
+ tickExit = tick.exit(),
+ tickEnter = tick.enter().append("g").attr("class", "tick"),
+ line = tick.select("line"),
+ text = tick.select("text");
+
+ path = path.merge(path.enter().insert("path", ".tick")
+ .attr("class", "domain")
+ .attr("stroke", "currentColor"));
+
+ tick = tick.merge(tickEnter);
+
+ line = line.merge(tickEnter.append("line")
+ .attr("stroke", "currentColor")
+ .attr(x + "2", k * tickSizeInner));
+
+ text = text.merge(tickEnter.append("text")
+ .attr("fill", "currentColor")
+ .attr(x, k * spacing)
+ .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));
+
+ if (context !== selection) {
+ path = path.transition(context);
+ tick = tick.transition(context);
+ line = line.transition(context);
+ text = text.transition(context);
+
+ tickExit = tickExit.transition(context)
+ .attr("opacity", epsilon$6)
+ .attr("transform", function(d) { return isFinite(d = position(d)) ? transform(d + offset) : this.getAttribute("transform"); });
+
+ tickEnter
+ .attr("opacity", epsilon$6)
+ .attr("transform", function(d) { var p = this.parentNode.__axis; return transform((p && isFinite(p = p(d)) ? p : position(d)) + offset); });
+ }
+
+ tickExit.remove();
+
+ path
+ .attr("d", orient === left || orient === right
+ ? (tickSizeOuter ? "M" + k * tickSizeOuter + "," + range0 + "H" + offset + "V" + range1 + "H" + k * tickSizeOuter : "M" + offset + "," + range0 + "V" + range1)
+ : (tickSizeOuter ? "M" + range0 + "," + k * tickSizeOuter + "V" + offset + "H" + range1 + "V" + k * tickSizeOuter : "M" + range0 + "," + offset + "H" + range1));
+
+ tick
+ .attr("opacity", 1)
+ .attr("transform", function(d) { return transform(position(d) + offset); });
+
+ line
+ .attr(x + "2", k * tickSizeInner);
+
+ text
+ .attr(x, k * spacing)
+ .text(format);
+
+ selection.filter(entering)
+ .attr("fill", "none")
+ .attr("font-size", 10)
+ .attr("font-family", "sans-serif")
+ .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");
+
+ selection
+ .each(function() { this.__axis = position; });
+ }
+
+ axis.scale = function(_) {
+ return arguments.length ? (scale = _, axis) : scale;
+ };
+
+ axis.ticks = function() {
+ return tickArguments = Array.from(arguments), axis;
+ };
+
+ axis.tickArguments = function(_) {
+ return arguments.length ? (tickArguments = _ == null ? [] : Array.from(_), axis) : tickArguments.slice();
+ };
+
+ axis.tickValues = function(_) {
+ return arguments.length ? (tickValues = _ == null ? null : Array.from(_), axis) : tickValues && tickValues.slice();
+ };
+
+ axis.tickFormat = function(_) {
+ return arguments.length ? (tickFormat = _, axis) : tickFormat;
+ };
+
+ axis.tickSize = function(_) {
+ return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
+ };
+
+ axis.tickSizeInner = function(_) {
+ return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
+ };
+
+ axis.tickSizeOuter = function(_) {
+ return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
+ };
+
+ axis.tickPadding = function(_) {
+ return arguments.length ? (tickPadding = +_, axis) : tickPadding;
+ };
+
+ axis.offset = function(_) {
+ return arguments.length ? (offset = +_, axis) : offset;
+ };
+
+ return axis;
+}
+
+function axisTop(scale) {
+ return axis(top, scale);
+}
+
+function axisRight(scale) {
+ return axis(right, scale);
+}
+
+function axisBottom(scale) {
+ return axis(bottom, scale);
+}
+
+function axisLeft(scale) {
+ return axis(left, scale);
+}
+
+var noop$3 = {value: () => {}};
+
+function dispatch() {
+ for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+ if (!(t = arguments[i] + "") || (t in _) || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
+ _[t] = [];
+ }
+ return new Dispatch(_);
+}
+
+function Dispatch(_) {
+ this._ = _;
+}
+
+function parseTypenames$1(typenames, types) {
+ return typenames.trim().split(/^|\s+/).map(function(t) {
+ var name = "", i = t.indexOf(".");
+ if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+ if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+ return {type: t, name: name};
+ });
+}
+
+Dispatch.prototype = dispatch.prototype = {
+ constructor: Dispatch,
+ on: function(typename, callback) {
+ var _ = this._,
+ T = parseTypenames$1(typename + "", _),
+ t,
+ i = -1,
+ n = T.length;
+
+ // If no callback was specified, return the callback of the given type and name.
+ if (arguments.length < 2) {
+ while (++i < n) if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) return t;
+ return;
+ }
+
+ // If a type was specified, set the callback for the given type and name.
+ // Otherwise, if a null callback was specified, remove callbacks of the given name.
+ if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+ while (++i < n) {
+ if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);
+ else if (callback == null) for (t in _) _[t] = set$1(_[t], typename.name, null);
+ }
+
+ return this;
+ },
+ copy: function() {
+ var copy = {}, _ = this._;
+ for (var t in _) copy[t] = _[t].slice();
+ return new Dispatch(copy);
+ },
+ call: function(type, that) {
+ if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+ if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+ for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+ },
+ apply: function(type, that, args) {
+ if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+ for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+ }
+};
+
+function get$1(type, name) {
+ for (var i = 0, n = type.length, c; i < n; ++i) {
+ if ((c = type[i]).name === name) {
+ return c.value;
+ }
+ }
+}
+
+function set$1(type, name, callback) {
+ for (var i = 0, n = type.length; i < n; ++i) {
+ if (type[i].name === name) {
+ type[i] = noop$3, type = type.slice(0, i).concat(type.slice(i + 1));
+ break;
+ }
+ }
+ if (callback != null) type.push({name: name, value: callback});
+ return type;
+}
+
+var xhtml = "http://www.w3.org/1999/xhtml";
+
+var namespaces = {
+ svg: "http://www.w3.org/2000/svg",
+ xhtml: xhtml,
+ xlink: "http://www.w3.org/1999/xlink",
+ xml: "http://www.w3.org/XML/1998/namespace",
+ xmlns: "http://www.w3.org/2000/xmlns/"
+};
+
+function namespace(name) {
+ var prefix = name += "", i = prefix.indexOf(":");
+ if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+ return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name; // eslint-disable-line no-prototype-builtins
+}
+
+function creatorInherit(name) {
+ return function() {
+ var document = this.ownerDocument,
+ uri = this.namespaceURI;
+ return uri === xhtml && document.documentElement.namespaceURI === xhtml
+ ? document.createElement(name)
+ : document.createElementNS(uri, name);
+ };
+}
+
+function creatorFixed(fullname) {
+ return function() {
+ return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+ };
+}
+
+function creator(name) {
+ var fullname = namespace(name);
+ return (fullname.local
+ ? creatorFixed
+ : creatorInherit)(fullname);
+}
+
+function none$2() {}
+
+function selector(selector) {
+ return selector == null ? none$2 : function() {
+ return this.querySelector(selector);
+ };
+}
+
+function selection_select(select) {
+ if (typeof select !== "function") select = selector(select);
+
+ for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+ if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+ if ("__data__" in node) subnode.__data__ = node.__data__;
+ subgroup[i] = subnode;
+ }
+ }
+ }
+
+ return new Selection$1(subgroups, this._parents);
+}
+
+// Given something array like (or null), returns something that is strictly an
+// array. This is used to ensure that array-like objects passed to d3.selectAll
+// or selection.selectAll are converted into proper arrays when creating a
+// selection; we don’t ever want to create a selection backed by a live
+// HTMLCollection or NodeList. However, note that selection.selectAll will use a
+// static NodeList as a group, since it safely derived from querySelectorAll.
+function array$4(x) {
+ return x == null ? [] : Array.isArray(x) ? x : Array.from(x);
+}
+
+function empty$1() {
+ return [];
+}
+
+function selectorAll(selector) {
+ return selector == null ? empty$1 : function() {
+ return this.querySelectorAll(selector);
+ };
+}
+
+function arrayAll(select) {
+ return function() {
+ return array$4(select.apply(this, arguments));
+ };
+}
+
+function selection_selectAll(select) {
+ if (typeof select === "function") select = arrayAll(select);
+ else select = selectorAll(select);
+
+ for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+ if (node = group[i]) {
+ subgroups.push(select.call(node, node.__data__, i, group));
+ parents.push(node);
+ }
+ }
+ }
+
+ return new Selection$1(subgroups, parents);
+}
+
+function matcher(selector) {
+ return function() {
+ return this.matches(selector);
+ };
+}
+
+function childMatcher(selector) {
+ return function(node) {
+ return node.matches(selector);
+ };
+}
+
+var find$1 = Array.prototype.find;
+
+function childFind(match) {
+ return function() {
+ return find$1.call(this.children, match);
+ };
+}
+
+function childFirst() {
+ return this.firstElementChild;
+}
+
+function selection_selectChild(match) {
+ return this.select(match == null ? childFirst
+ : childFind(typeof match === "function" ? match : childMatcher(match)));
+}
+
+var filter = Array.prototype.filter;
+
+function children() {
+ return Array.from(this.children);
+}
+
+function childrenFilter(match) {
+ return function() {
+ return filter.call(this.children, match);
+ };
+}
+
+function selection_selectChildren(match) {
+ return this.selectAll(match == null ? children
+ : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+}
+
+function selection_filter(match) {
+ if (typeof match !== "function") match = matcher(match);
+
+ for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+ if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+ subgroup.push(node);
+ }
+ }
+ }
+
+ return new Selection$1(subgroups, this._parents);
+}
+
+function sparse(update) {
+ return new Array(update.length);
+}
+
+function selection_enter() {
+ return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
+}
+
+function EnterNode(parent, datum) {
+ this.ownerDocument = parent.ownerDocument;
+ this.namespaceURI = parent.namespaceURI;
+ this._next = null;
+ this._parent = parent;
+ this.__data__ = datum;
+}
+
+EnterNode.prototype = {
+ constructor: EnterNode,
+ appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
+ insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
+ querySelector: function(selector) { return this._parent.querySelector(selector); },
+ querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+};
+
+function constant$a(x) {
+ return function() {
+ return x;
+ };
+}
+
+function bindIndex(parent, group, enter, update, exit, data) {
+ var i = 0,
+ node,
+ groupLength = group.length,
+ dataLength = data.length;
+
+ // Put any non-null nodes that fit into update.
+ // Put any null nodes into enter.
+ // Put any remaining data into enter.
+ for (; i < dataLength; ++i) {
+ if (node = group[i]) {
+ node.__data__ = data[i];
+ update[i] = node;
+ } else {
+ enter[i] = new EnterNode(parent, data[i]);
+ }
+ }
+
+ // Put any non-null nodes that don’t fit into exit.
+ for (; i < groupLength; ++i) {
+ if (node = group[i]) {
+ exit[i] = node;
+ }
+ }
+}
+
+function bindKey(parent, group, enter, update, exit, data, key) {
+ var i,
+ node,
+ nodeByKeyValue = new Map,
+ groupLength = group.length,
+ dataLength = data.length,
+ keyValues = new Array(groupLength),
+ keyValue;
+
+ // Compute the key for each node.
+ // If multiple nodes have the same key, the duplicates are added to exit.
+ for (i = 0; i < groupLength; ++i) {
+ if (node = group[i]) {
+ keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
+ if (nodeByKeyValue.has(keyValue)) {
+ exit[i] = node;
+ } else {
+ nodeByKeyValue.set(keyValue, node);
+ }
+ }
+ }
+
+ // Compute the key for each datum.
+ // If there a node associated with this key, join and add it to update.
+ // If there is not (or the key is a duplicate), add it to enter.
+ for (i = 0; i < dataLength; ++i) {
+ keyValue = key.call(parent, data[i], i, data) + "";
+ if (node = nodeByKeyValue.get(keyValue)) {
+ update[i] = node;
+ node.__data__ = data[i];
+ nodeByKeyValue.delete(keyValue);
+ } else {
+ enter[i] = new EnterNode(parent, data[i]);
+ }
+ }
+
+ // Add any remaining nodes that were not bound to data to exit.
+ for (i = 0; i < groupLength; ++i) {
+ if ((node = group[i]) && (nodeByKeyValue.get(keyValues[i]) === node)) {
+ exit[i] = node;
+ }
+ }
+}
+
+function datum(node) {
+ return node.__data__;
+}
+
+function selection_data(value, key) {
+ if (!arguments.length) return Array.from(this, datum);
+
+ var bind = key ? bindKey : bindIndex,
+ parents = this._parents,
+ groups = this._groups;
+
+ if (typeof value !== "function") value = constant$a(value);
+
+ for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+ var parent = parents[j],
+ group = groups[j],
+ groupLength = group.length,
+ data = arraylike(value.call(parent, parent && parent.__data__, j, parents)),
+ dataLength = data.length,
+ enterGroup = enter[j] = new Array(dataLength),
+ updateGroup = update[j] = new Array(dataLength),
+ exitGroup = exit[j] = new Array(groupLength);
+
+ bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+
+ // Now connect the enter nodes to their following update node, such that
+ // appendChild can insert the materialized enter node before this node,
+ // rather than at the end of the parent node.
+ for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+ if (previous = enterGroup[i0]) {
+ if (i0 >= i1) i1 = i0 + 1;
+ while (!(next = updateGroup[i1]) && ++i1 < dataLength);
+ previous._next = next || null;
+ }
+ }
+ }
+
+ update = new Selection$1(update, parents);
+ update._enter = enter;
+ update._exit = exit;
+ return update;
+}
+
+// Given some data, this returns an array-like view of it: an object that
+// exposes a length property and allows numeric indexing. Note that unlike
+// selectAll, this isn’t worried about “live” collections because the resulting
+// array will only be used briefly while data is being bound. (It is possible to
+// cause the data to change while iterating by using a key function, but please
+// don’t; we’d rather avoid a gratuitous copy.)
+function arraylike(data) {
+ return typeof data === "object" && "length" in data
+ ? data // Array, TypedArray, NodeList, array-like
+ : Array.from(data); // Map, Set, iterable, string, or anything else
+}
+
+function selection_exit() {
+ return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
+}
+
+function selection_join(onenter, onupdate, onexit) {
+ var enter = this.enter(), update = this, exit = this.exit();
+ if (typeof onenter === "function") {
+ enter = onenter(enter);
+ if (enter) enter = enter.selection();
+ } else {
+ enter = enter.append(onenter + "");
+ }
+ if (onupdate != null) {
+ update = onupdate(update);
+ if (update) update = update.selection();
+ }
+ if (onexit == null) exit.remove(); else onexit(exit);
+ return enter && update ? enter.merge(update).order() : update;
+}
+
+function selection_merge(context) {
+ var selection = context.selection ? context.selection() : context;
+
+ for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+ for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+ if (node = group0[i] || group1[i]) {
+ merge[i] = node;
+ }
+ }
+ }
+
+ for (; j < m0; ++j) {
+ merges[j] = groups0[j];
+ }
+
+ return new Selection$1(merges, this._parents);
+}
+
+function selection_order() {
+
+ for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+ for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+ if (node = group[i]) {
+ if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+ next = node;
+ }
+ }
+ }
+
+ return this;
+}
+
+function selection_sort(compare) {
+ if (!compare) compare = ascending$2;
+
+ function compareNode(a, b) {
+ return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+ }
+
+ for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+ if (node = group[i]) {
+ sortgroup[i] = node;
+ }
+ }
+ sortgroup.sort(compareNode);
+ }
+
+ return new Selection$1(sortgroups, this._parents).order();
+}
+
+function ascending$2(a, b) {
+ return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+}
+
+function selection_call() {
+ var callback = arguments[0];
+ arguments[0] = this;
+ callback.apply(null, arguments);
+ return this;
+}
+
+function selection_nodes() {
+ return Array.from(this);
+}
+
+function selection_node() {
+
+ for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+ for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+ var node = group[i];
+ if (node) return node;
+ }
+ }
+
+ return null;
+}
+
+function selection_size() {
+ let size = 0;
+ for (const node of this) ++size; // eslint-disable-line no-unused-vars
+ return size;
+}
+
+function selection_empty() {
+ return !this.node();
+}
+
+function selection_each(callback) {
+
+ for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+ for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+ if (node = group[i]) callback.call(node, node.__data__, i, group);
+ }
+ }
+
+ return this;
+}
+
+function attrRemove$1(name) {
+ return function() {
+ this.removeAttribute(name);
+ };
+}
+
+function attrRemoveNS$1(fullname) {
+ return function() {
+ this.removeAttributeNS(fullname.space, fullname.local);
+ };
+}
+
+function attrConstant$1(name, value) {
+ return function() {
+ this.setAttribute(name, value);
+ };
+}
+
+function attrConstantNS$1(fullname, value) {
+ return function() {
+ this.setAttributeNS(fullname.space, fullname.local, value);
+ };
+}
+
+function attrFunction$1(name, value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ if (v == null) this.removeAttribute(name);
+ else this.setAttribute(name, v);
+ };
+}
+
+function attrFunctionNS$1(fullname, value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
+ else this.setAttributeNS(fullname.space, fullname.local, v);
+ };
+}
+
+function selection_attr(name, value) {
+ var fullname = namespace(name);
+
+ if (arguments.length < 2) {
+ var node = this.node();
+ return fullname.local
+ ? node.getAttributeNS(fullname.space, fullname.local)
+ : node.getAttribute(fullname);
+ }
+
+ return this.each((value == null
+ ? (fullname.local ? attrRemoveNS$1 : attrRemove$1) : (typeof value === "function"
+ ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)
+ : (fullname.local ? attrConstantNS$1 : attrConstant$1)))(fullname, value));
+}
+
+function defaultView(node) {
+ return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
+ || (node.document && node) // node is a Window
+ || node.defaultView; // node is a Document
+}
+
+function styleRemove$1(name) {
+ return function() {
+ this.style.removeProperty(name);
+ };
+}
+
+function styleConstant$1(name, value, priority) {
+ return function() {
+ this.style.setProperty(name, value, priority);
+ };
+}
+
+function styleFunction$1(name, value, priority) {
+ return function() {
+ var v = value.apply(this, arguments);
+ if (v == null) this.style.removeProperty(name);
+ else this.style.setProperty(name, v, priority);
+ };
+}
+
+function selection_style(name, value, priority) {
+ return arguments.length > 1
+ ? this.each((value == null
+ ? styleRemove$1 : typeof value === "function"
+ ? styleFunction$1
+ : styleConstant$1)(name, value, priority == null ? "" : priority))
+ : styleValue(this.node(), name);
+}
+
+function styleValue(node, name) {
+ return node.style.getPropertyValue(name)
+ || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+}
+
+function propertyRemove(name) {
+ return function() {
+ delete this[name];
+ };
+}
+
+function propertyConstant(name, value) {
+ return function() {
+ this[name] = value;
+ };
+}
+
+function propertyFunction(name, value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ if (v == null) delete this[name];
+ else this[name] = v;
+ };
+}
+
+function selection_property(name, value) {
+ return arguments.length > 1
+ ? this.each((value == null
+ ? propertyRemove : typeof value === "function"
+ ? propertyFunction
+ : propertyConstant)(name, value))
+ : this.node()[name];
+}
+
+function classArray(string) {
+ return string.trim().split(/^|\s+/);
+}
+
+function classList(node) {
+ return node.classList || new ClassList(node);
+}
+
+function ClassList(node) {
+ this._node = node;
+ this._names = classArray(node.getAttribute("class") || "");
+}
+
+ClassList.prototype = {
+ add: function(name) {
+ var i = this._names.indexOf(name);
+ if (i < 0) {
+ this._names.push(name);
+ this._node.setAttribute("class", this._names.join(" "));
+ }
+ },
+ remove: function(name) {
+ var i = this._names.indexOf(name);
+ if (i >= 0) {
+ this._names.splice(i, 1);
+ this._node.setAttribute("class", this._names.join(" "));
+ }
+ },
+ contains: function(name) {
+ return this._names.indexOf(name) >= 0;
+ }
+};
+
+function classedAdd(node, names) {
+ var list = classList(node), i = -1, n = names.length;
+ while (++i < n) list.add(names[i]);
+}
+
+function classedRemove(node, names) {
+ var list = classList(node), i = -1, n = names.length;
+ while (++i < n) list.remove(names[i]);
+}
+
+function classedTrue(names) {
+ return function() {
+ classedAdd(this, names);
+ };
+}
+
+function classedFalse(names) {
+ return function() {
+ classedRemove(this, names);
+ };
+}
+
+function classedFunction(names, value) {
+ return function() {
+ (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+ };
+}
+
+function selection_classed(name, value) {
+ var names = classArray(name + "");
+
+ if (arguments.length < 2) {
+ var list = classList(this.node()), i = -1, n = names.length;
+ while (++i < n) if (!list.contains(names[i])) return false;
+ return true;
+ }
+
+ return this.each((typeof value === "function"
+ ? classedFunction : value
+ ? classedTrue
+ : classedFalse)(names, value));
+}
+
+function textRemove() {
+ this.textContent = "";
+}
+
+function textConstant$1(value) {
+ return function() {
+ this.textContent = value;
+ };
+}
+
+function textFunction$1(value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ this.textContent = v == null ? "" : v;
+ };
+}
+
+function selection_text(value) {
+ return arguments.length
+ ? this.each(value == null
+ ? textRemove : (typeof value === "function"
+ ? textFunction$1
+ : textConstant$1)(value))
+ : this.node().textContent;
+}
+
+function htmlRemove() {
+ this.innerHTML = "";
+}
+
+function htmlConstant(value) {
+ return function() {
+ this.innerHTML = value;
+ };
+}
+
+function htmlFunction(value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ this.innerHTML = v == null ? "" : v;
+ };
+}
+
+function selection_html(value) {
+ return arguments.length
+ ? this.each(value == null
+ ? htmlRemove : (typeof value === "function"
+ ? htmlFunction
+ : htmlConstant)(value))
+ : this.node().innerHTML;
+}
+
+function raise() {
+ if (this.nextSibling) this.parentNode.appendChild(this);
+}
+
+function selection_raise() {
+ return this.each(raise);
+}
+
+function lower() {
+ if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+}
+
+function selection_lower() {
+ return this.each(lower);
+}
+
+function selection_append(name) {
+ var create = typeof name === "function" ? name : creator(name);
+ return this.select(function() {
+ return this.appendChild(create.apply(this, arguments));
+ });
+}
+
+function constantNull() {
+ return null;
+}
+
+function selection_insert(name, before) {
+ var create = typeof name === "function" ? name : creator(name),
+ select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+ return this.select(function() {
+ return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+ });
+}
+
+function remove() {
+ var parent = this.parentNode;
+ if (parent) parent.removeChild(this);
+}
+
+function selection_remove() {
+ return this.each(remove);
+}
+
+function selection_cloneShallow() {
+ var clone = this.cloneNode(false), parent = this.parentNode;
+ return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+}
+
+function selection_cloneDeep() {
+ var clone = this.cloneNode(true), parent = this.parentNode;
+ return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+}
+
+function selection_clone(deep) {
+ return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+}
+
+function selection_datum(value) {
+ return arguments.length
+ ? this.property("__data__", value)
+ : this.node().__data__;
+}
+
+function contextListener(listener) {
+ return function(event) {
+ listener.call(this, event, this.__data__);
+ };
+}
+
+function parseTypenames(typenames) {
+ return typenames.trim().split(/^|\s+/).map(function(t) {
+ var name = "", i = t.indexOf(".");
+ if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+ return {type: t, name: name};
+ });
+}
+
+function onRemove(typename) {
+ return function() {
+ var on = this.__on;
+ if (!on) return;
+ for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+ if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+ this.removeEventListener(o.type, o.listener, o.options);
+ } else {
+ on[++i] = o;
+ }
+ }
+ if (++i) on.length = i;
+ else delete this.__on;
+ };
+}
+
+function onAdd(typename, value, options) {
+ return function() {
+ var on = this.__on, o, listener = contextListener(value);
+ if (on) for (var j = 0, m = on.length; j < m; ++j) {
+ if ((o = on[j]).type === typename.type && o.name === typename.name) {
+ this.removeEventListener(o.type, o.listener, o.options);
+ this.addEventListener(o.type, o.listener = listener, o.options = options);
+ o.value = value;
+ return;
+ }
+ }
+ this.addEventListener(typename.type, listener, options);
+ o = {type: typename.type, name: typename.name, value: value, listener: listener, options: options};
+ if (!on) this.__on = [o];
+ else on.push(o);
+ };
+}
+
+function selection_on(typename, value, options) {
+ var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
+
+ if (arguments.length < 2) {
+ var on = this.node().__on;
+ if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+ for (i = 0, o = on[j]; i < n; ++i) {
+ if ((t = typenames[i]).type === o.type && t.name === o.name) {
+ return o.value;
+ }
+ }
+ }
+ return;
+ }
+
+ on = value ? onAdd : onRemove;
+ for (i = 0; i < n; ++i) this.each(on(typenames[i], value, options));
+ return this;
+}
+
+function dispatchEvent(node, type, params) {
+ var window = defaultView(node),
+ event = window.CustomEvent;
+
+ if (typeof event === "function") {
+ event = new event(type, params);
+ } else {
+ event = window.document.createEvent("Event");
+ if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
+ else event.initEvent(type, false, false);
+ }
+
+ node.dispatchEvent(event);
+}
+
+function dispatchConstant(type, params) {
+ return function() {
+ return dispatchEvent(this, type, params);
+ };
+}
+
+function dispatchFunction(type, params) {
+ return function() {
+ return dispatchEvent(this, type, params.apply(this, arguments));
+ };
+}
+
+function selection_dispatch(type, params) {
+ return this.each((typeof params === "function"
+ ? dispatchFunction
+ : dispatchConstant)(type, params));
+}
+
+function* selection_iterator() {
+ for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+ for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+ if (node = group[i]) yield node;
+ }
+ }
+}
+
+var root$1 = [null];
+
+function Selection$1(groups, parents) {
+ this._groups = groups;
+ this._parents = parents;
+}
+
+function selection() {
+ return new Selection$1([[document.documentElement]], root$1);
+}
+
+function selection_selection() {
+ return this;
+}
+
+Selection$1.prototype = selection.prototype = {
+ constructor: Selection$1,
+ select: selection_select,
+ selectAll: selection_selectAll,
+ selectChild: selection_selectChild,
+ selectChildren: selection_selectChildren,
+ filter: selection_filter,
+ data: selection_data,
+ enter: selection_enter,
+ exit: selection_exit,
+ join: selection_join,
+ merge: selection_merge,
+ selection: selection_selection,
+ order: selection_order,
+ sort: selection_sort,
+ call: selection_call,
+ nodes: selection_nodes,
+ node: selection_node,
+ size: selection_size,
+ empty: selection_empty,
+ each: selection_each,
+ attr: selection_attr,
+ style: selection_style,
+ property: selection_property,
+ classed: selection_classed,
+ text: selection_text,
+ html: selection_html,
+ raise: selection_raise,
+ lower: selection_lower,
+ append: selection_append,
+ insert: selection_insert,
+ remove: selection_remove,
+ clone: selection_clone,
+ datum: selection_datum,
+ on: selection_on,
+ dispatch: selection_dispatch,
+ [Symbol.iterator]: selection_iterator
+};
+
+function select(selector) {
+ return typeof selector === "string"
+ ? new Selection$1([[document.querySelector(selector)]], [document.documentElement])
+ : new Selection$1([[selector]], root$1);
+}
+
+function create$1(name) {
+ return select(creator(name).call(document.documentElement));
+}
+
+var nextId = 0;
+
+function local$1() {
+ return new Local;
+}
+
+function Local() {
+ this._ = "@" + (++nextId).toString(36);
+}
+
+Local.prototype = local$1.prototype = {
+ constructor: Local,
+ get: function(node) {
+ var id = this._;
+ while (!(id in node)) if (!(node = node.parentNode)) return;
+ return node[id];
+ },
+ set: function(node, value) {
+ return node[this._] = value;
+ },
+ remove: function(node) {
+ return this._ in node && delete node[this._];
+ },
+ toString: function() {
+ return this._;
+ }
+};
+
+function sourceEvent(event) {
+ let sourceEvent;
+ while (sourceEvent = event.sourceEvent) event = sourceEvent;
+ return event;
+}
+
+function pointer(event, node) {
+ event = sourceEvent(event);
+ if (node === undefined) node = event.currentTarget;
+ if (node) {
+ var svg = node.ownerSVGElement || node;
+ if (svg.createSVGPoint) {
+ var point = svg.createSVGPoint();
+ point.x = event.clientX, point.y = event.clientY;
+ point = point.matrixTransform(node.getScreenCTM().inverse());
+ return [point.x, point.y];
+ }
+ if (node.getBoundingClientRect) {
+ var rect = node.getBoundingClientRect();
+ return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+ }
+ }
+ return [event.pageX, event.pageY];
+}
+
+function pointers(events, node) {
+ if (events.target) { // i.e., instanceof Event, not TouchList or iterable
+ events = sourceEvent(events);
+ if (node === undefined) node = events.currentTarget;
+ events = events.touches || [events];
+ }
+ return Array.from(events, event => pointer(event, node));
+}
+
+function selectAll(selector) {
+ return typeof selector === "string"
+ ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement])
+ : new Selection$1([array$4(selector)], root$1);
+}
+
+// These are typically used in conjunction with noevent to ensure that we can
+// preventDefault on the event.
+const nonpassive = {passive: false};
+const nonpassivecapture = {capture: true, passive: false};
+
+function nopropagation$2(event) {
+ event.stopImmediatePropagation();
+}
+
+function noevent$2(event) {
+ event.preventDefault();
+ event.stopImmediatePropagation();
+}
+
+function dragDisable(view) {
+ var root = view.document.documentElement,
+ selection = select(view).on("dragstart.drag", noevent$2, nonpassivecapture);
+ if ("onselectstart" in root) {
+ selection.on("selectstart.drag", noevent$2, nonpassivecapture);
+ } else {
+ root.__noselect = root.style.MozUserSelect;
+ root.style.MozUserSelect = "none";
+ }
+}
+
+function yesdrag(view, noclick) {
+ var root = view.document.documentElement,
+ selection = select(view).on("dragstart.drag", null);
+ if (noclick) {
+ selection.on("click.drag", noevent$2, nonpassivecapture);
+ setTimeout(function() { selection.on("click.drag", null); }, 0);
+ }
+ if ("onselectstart" in root) {
+ selection.on("selectstart.drag", null);
+ } else {
+ root.style.MozUserSelect = root.__noselect;
+ delete root.__noselect;
+ }
+}
+
+var constant$9 = x => () => x;
+
+function DragEvent(type, {
+ sourceEvent,
+ subject,
+ target,
+ identifier,
+ active,
+ x, y, dx, dy,
+ dispatch
+}) {
+ Object.defineProperties(this, {
+ type: {value: type, enumerable: true, configurable: true},
+ sourceEvent: {value: sourceEvent, enumerable: true, configurable: true},
+ subject: {value: subject, enumerable: true, configurable: true},
+ target: {value: target, enumerable: true, configurable: true},
+ identifier: {value: identifier, enumerable: true, configurable: true},
+ active: {value: active, enumerable: true, configurable: true},
+ x: {value: x, enumerable: true, configurable: true},
+ y: {value: y, enumerable: true, configurable: true},
+ dx: {value: dx, enumerable: true, configurable: true},
+ dy: {value: dy, enumerable: true, configurable: true},
+ _: {value: dispatch}
+ });
+}
+
+DragEvent.prototype.on = function() {
+ var value = this._.on.apply(this._, arguments);
+ return value === this._ ? this : value;
+};
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter$2(event) {
+ return !event.ctrlKey && !event.button;
+}
+
+function defaultContainer() {
+ return this.parentNode;
+}
+
+function defaultSubject(event, d) {
+ return d == null ? {x: event.x, y: event.y} : d;
+}
+
+function defaultTouchable$2() {
+ return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
+function drag() {
+ var filter = defaultFilter$2,
+ container = defaultContainer,
+ subject = defaultSubject,
+ touchable = defaultTouchable$2,
+ gestures = {},
+ listeners = dispatch("start", "drag", "end"),
+ active = 0,
+ mousedownx,
+ mousedowny,
+ mousemoving,
+ touchending,
+ clickDistance2 = 0;
+
+ function drag(selection) {
+ selection
+ .on("mousedown.drag", mousedowned)
+ .filter(touchable)
+ .on("touchstart.drag", touchstarted)
+ .on("touchmove.drag", touchmoved, nonpassive)
+ .on("touchend.drag touchcancel.drag", touchended)
+ .style("touch-action", "none")
+ .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+ }
+
+ function mousedowned(event, d) {
+ if (touchending || !filter.call(this, event, d)) return;
+ var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
+ if (!gesture) return;
+ select(event.view)
+ .on("mousemove.drag", mousemoved, nonpassivecapture)
+ .on("mouseup.drag", mouseupped, nonpassivecapture);
+ dragDisable(event.view);
+ nopropagation$2(event);
+ mousemoving = false;
+ mousedownx = event.clientX;
+ mousedowny = event.clientY;
+ gesture("start", event);
+ }
+
+ function mousemoved(event) {
+ noevent$2(event);
+ if (!mousemoving) {
+ var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
+ mousemoving = dx * dx + dy * dy > clickDistance2;
+ }
+ gestures.mouse("drag", event);
+ }
+
+ function mouseupped(event) {
+ select(event.view).on("mousemove.drag mouseup.drag", null);
+ yesdrag(event.view, mousemoving);
+ noevent$2(event);
+ gestures.mouse("end", event);
+ }
+
+ function touchstarted(event, d) {
+ if (!filter.call(this, event, d)) return;
+ var touches = event.changedTouches,
+ c = container.call(this, event, d),
+ n = touches.length, i, gesture;
+
+ for (i = 0; i < n; ++i) {
+ if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
+ nopropagation$2(event);
+ gesture("start", event, touches[i]);
+ }
+ }
+ }
+
+ function touchmoved(event) {
+ var touches = event.changedTouches,
+ n = touches.length, i, gesture;
+
+ for (i = 0; i < n; ++i) {
+ if (gesture = gestures[touches[i].identifier]) {
+ noevent$2(event);
+ gesture("drag", event, touches[i]);
+ }
+ }
+ }
+
+ function touchended(event) {
+ var touches = event.changedTouches,
+ n = touches.length, i, gesture;
+
+ if (touchending) clearTimeout(touchending);
+ touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+ for (i = 0; i < n; ++i) {
+ if (gesture = gestures[touches[i].identifier]) {
+ nopropagation$2(event);
+ gesture("end", event, touches[i]);
+ }
+ }
+ }
+
+ function beforestart(that, container, event, d, identifier, touch) {
+ var dispatch = listeners.copy(),
+ p = pointer(touch || event, container), dx, dy,
+ s;
+
+ if ((s = subject.call(that, new DragEvent("beforestart", {
+ sourceEvent: event,
+ target: drag,
+ identifier,
+ active,
+ x: p[0],
+ y: p[1],
+ dx: 0,
+ dy: 0,
+ dispatch
+ }), d)) == null) return;
+
+ dx = s.x - p[0] || 0;
+ dy = s.y - p[1] || 0;
+
+ return function gesture(type, event, touch) {
+ var p0 = p, n;
+ switch (type) {
+ case "start": gestures[identifier] = gesture, n = active++; break;
+ case "end": delete gestures[identifier], --active; // falls through
+ case "drag": p = pointer(touch || event, container), n = active; break;
+ }
+ dispatch.call(
+ type,
+ that,
+ new DragEvent(type, {
+ sourceEvent: event,
+ subject: s,
+ target: drag,
+ identifier,
+ active: n,
+ x: p[0] + dx,
+ y: p[1] + dy,
+ dx: p[0] - p0[0],
+ dy: p[1] - p0[1],
+ dispatch
+ }),
+ d
+ );
+ };
+ }
+
+ drag.filter = function(_) {
+ return arguments.length ? (filter = typeof _ === "function" ? _ : constant$9(!!_), drag) : filter;
+ };
+
+ drag.container = function(_) {
+ return arguments.length ? (container = typeof _ === "function" ? _ : constant$9(_), drag) : container;
+ };
+
+ drag.subject = function(_) {
+ return arguments.length ? (subject = typeof _ === "function" ? _ : constant$9(_), drag) : subject;
+ };
+
+ drag.touchable = function(_) {
+ return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$9(!!_), drag) : touchable;
+ };
+
+ drag.on = function() {
+ var value = listeners.on.apply(listeners, arguments);
+ return value === listeners ? drag : value;
+ };
+
+ drag.clickDistance = function(_) {
+ return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+ };
+
+ return drag;
+}
+
+function define(constructor, factory, prototype) {
+ constructor.prototype = factory.prototype = prototype;
+ prototype.constructor = constructor;
+}
+
+function extend(parent, definition) {
+ var prototype = Object.create(parent.prototype);
+ for (var key in definition) prototype[key] = definition[key];
+ return prototype;
+}
+
+function Color() {}
+
+var darker = 0.7;
+var brighter = 1 / darker;
+
+var reI = "\\s*([+-]?\\d+)\\s*",
+ reN = "\\s*([+-]?(?:\\d*\\.)?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+ reP = "\\s*([+-]?(?:\\d*\\.)?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+ reHex = /^#([0-9a-f]{3,8})$/,
+ reRgbInteger = new RegExp(`^rgb\\(${reI},${reI},${reI}\\)$`),
+ reRgbPercent = new RegExp(`^rgb\\(${reP},${reP},${reP}\\)$`),
+ reRgbaInteger = new RegExp(`^rgba\\(${reI},${reI},${reI},${reN}\\)$`),
+ reRgbaPercent = new RegExp(`^rgba\\(${reP},${reP},${reP},${reN}\\)$`),
+ reHslPercent = new RegExp(`^hsl\\(${reN},${reP},${reP}\\)$`),
+ reHslaPercent = new RegExp(`^hsla\\(${reN},${reP},${reP},${reN}\\)$`);
+
+var named = {
+ aliceblue: 0xf0f8ff,
+ antiquewhite: 0xfaebd7,
+ aqua: 0x00ffff,
+ aquamarine: 0x7fffd4,
+ azure: 0xf0ffff,
+ beige: 0xf5f5dc,
+ bisque: 0xffe4c4,
+ black: 0x000000,
+ blanchedalmond: 0xffebcd,
+ blue: 0x0000ff,
+ blueviolet: 0x8a2be2,
+ brown: 0xa52a2a,
+ burlywood: 0xdeb887,
+ cadetblue: 0x5f9ea0,
+ chartreuse: 0x7fff00,
+ chocolate: 0xd2691e,
+ coral: 0xff7f50,
+ cornflowerblue: 0x6495ed,
+ cornsilk: 0xfff8dc,
+ crimson: 0xdc143c,
+ cyan: 0x00ffff,
+ darkblue: 0x00008b,
+ darkcyan: 0x008b8b,
+ darkgoldenrod: 0xb8860b,
+ darkgray: 0xa9a9a9,
+ darkgreen: 0x006400,
+ darkgrey: 0xa9a9a9,
+ darkkhaki: 0xbdb76b,
+ darkmagenta: 0x8b008b,
+ darkolivegreen: 0x556b2f,
+ darkorange: 0xff8c00,
+ darkorchid: 0x9932cc,
+ darkred: 0x8b0000,
+ darksalmon: 0xe9967a,
+ darkseagreen: 0x8fbc8f,
+ darkslateblue: 0x483d8b,
+ darkslategray: 0x2f4f4f,
+ darkslategrey: 0x2f4f4f,
+ darkturquoise: 0x00ced1,
+ darkviolet: 0x9400d3,
+ deeppink: 0xff1493,
+ deepskyblue: 0x00bfff,
+ dimgray: 0x696969,
+ dimgrey: 0x696969,
+ dodgerblue: 0x1e90ff,
+ firebrick: 0xb22222,
+ floralwhite: 0xfffaf0,
+ forestgreen: 0x228b22,
+ fuchsia: 0xff00ff,
+ gainsboro: 0xdcdcdc,
+ ghostwhite: 0xf8f8ff,
+ gold: 0xffd700,
+ goldenrod: 0xdaa520,
+ gray: 0x808080,
+ green: 0x008000,
+ greenyellow: 0xadff2f,
+ grey: 0x808080,
+ honeydew: 0xf0fff0,
+ hotpink: 0xff69b4,
+ indianred: 0xcd5c5c,
+ indigo: 0x4b0082,
+ ivory: 0xfffff0,
+ khaki: 0xf0e68c,
+ lavender: 0xe6e6fa,
+ lavenderblush: 0xfff0f5,
+ lawngreen: 0x7cfc00,
+ lemonchiffon: 0xfffacd,
+ lightblue: 0xadd8e6,
+ lightcoral: 0xf08080,
+ lightcyan: 0xe0ffff,
+ lightgoldenrodyellow: 0xfafad2,
+ lightgray: 0xd3d3d3,
+ lightgreen: 0x90ee90,
+ lightgrey: 0xd3d3d3,
+ lightpink: 0xffb6c1,
+ lightsalmon: 0xffa07a,
+ lightseagreen: 0x20b2aa,
+ lightskyblue: 0x87cefa,
+ lightslategray: 0x778899,
+ lightslategrey: 0x778899,
+ lightsteelblue: 0xb0c4de,
+ lightyellow: 0xffffe0,
+ lime: 0x00ff00,
+ limegreen: 0x32cd32,
+ linen: 0xfaf0e6,
+ magenta: 0xff00ff,
+ maroon: 0x800000,
+ mediumaquamarine: 0x66cdaa,
+ mediumblue: 0x0000cd,
+ mediumorchid: 0xba55d3,
+ mediumpurple: 0x9370db,
+ mediumseagreen: 0x3cb371,
+ mediumslateblue: 0x7b68ee,
+ mediumspringgreen: 0x00fa9a,
+ mediumturquoise: 0x48d1cc,
+ mediumvioletred: 0xc71585,
+ midnightblue: 0x191970,
+ mintcream: 0xf5fffa,
+ mistyrose: 0xffe4e1,
+ moccasin: 0xffe4b5,
+ navajowhite: 0xffdead,
+ navy: 0x000080,
+ oldlace: 0xfdf5e6,
+ olive: 0x808000,
+ olivedrab: 0x6b8e23,
+ orange: 0xffa500,
+ orangered: 0xff4500,
+ orchid: 0xda70d6,
+ palegoldenrod: 0xeee8aa,
+ palegreen: 0x98fb98,
+ paleturquoise: 0xafeeee,
+ palevioletred: 0xdb7093,
+ papayawhip: 0xffefd5,
+ peachpuff: 0xffdab9,
+ peru: 0xcd853f,
+ pink: 0xffc0cb,
+ plum: 0xdda0dd,
+ powderblue: 0xb0e0e6,
+ purple: 0x800080,
+ rebeccapurple: 0x663399,
+ red: 0xff0000,
+ rosybrown: 0xbc8f8f,
+ royalblue: 0x4169e1,
+ saddlebrown: 0x8b4513,
+ salmon: 0xfa8072,
+ sandybrown: 0xf4a460,
+ seagreen: 0x2e8b57,
+ seashell: 0xfff5ee,
+ sienna: 0xa0522d,
+ silver: 0xc0c0c0,
+ skyblue: 0x87ceeb,
+ slateblue: 0x6a5acd,
+ slategray: 0x708090,
+ slategrey: 0x708090,
+ snow: 0xfffafa,
+ springgreen: 0x00ff7f,
+ steelblue: 0x4682b4,
+ tan: 0xd2b48c,
+ teal: 0x008080,
+ thistle: 0xd8bfd8,
+ tomato: 0xff6347,
+ turquoise: 0x40e0d0,
+ violet: 0xee82ee,
+ wheat: 0xf5deb3,
+ white: 0xffffff,
+ whitesmoke: 0xf5f5f5,
+ yellow: 0xffff00,
+ yellowgreen: 0x9acd32
+};
+
+define(Color, color, {
+ copy(channels) {
+ return Object.assign(new this.constructor, this, channels);
+ },
+ displayable() {
+ return this.rgb().displayable();
+ },
+ hex: color_formatHex, // Deprecated! Use color.formatHex.
+ formatHex: color_formatHex,
+ formatHex8: color_formatHex8,
+ formatHsl: color_formatHsl,
+ formatRgb: color_formatRgb,
+ toString: color_formatRgb
+});
+
+function color_formatHex() {
+ return this.rgb().formatHex();
+}
+
+function color_formatHex8() {
+ return this.rgb().formatHex8();
+}
+
+function color_formatHsl() {
+ return hslConvert(this).formatHsl();
+}
+
+function color_formatRgb() {
+ return this.rgb().formatRgb();
+}
+
+function color(format) {
+ var m, l;
+ format = (format + "").trim().toLowerCase();
+ return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+ : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
+ : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+ : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
+ : null) // invalid hex
+ : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+ : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+ : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+ : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+ : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+ : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+ : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
+ : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
+ : null;
+}
+
+function rgbn(n) {
+ return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+}
+
+function rgba(r, g, b, a) {
+ if (a <= 0) r = g = b = NaN;
+ return new Rgb(r, g, b, a);
+}
+
+function rgbConvert(o) {
+ if (!(o instanceof Color)) o = color(o);
+ if (!o) return new Rgb;
+ o = o.rgb();
+ return new Rgb(o.r, o.g, o.b, o.opacity);
+}
+
+function rgb(r, g, b, opacity) {
+ return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+}
+
+function Rgb(r, g, b, opacity) {
+ this.r = +r;
+ this.g = +g;
+ this.b = +b;
+ this.opacity = +opacity;
+}
+
+define(Rgb, rgb, extend(Color, {
+ brighter(k) {
+ k = k == null ? brighter : Math.pow(brighter, k);
+ return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+ },
+ darker(k) {
+ k = k == null ? darker : Math.pow(darker, k);
+ return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+ },
+ rgb() {
+ return this;
+ },
+ clamp() {
+ return new Rgb(clampi(this.r), clampi(this.g), clampi(this.b), clampa(this.opacity));
+ },
+ displayable() {
+ return (-0.5 <= this.r && this.r < 255.5)
+ && (-0.5 <= this.g && this.g < 255.5)
+ && (-0.5 <= this.b && this.b < 255.5)
+ && (0 <= this.opacity && this.opacity <= 1);
+ },
+ hex: rgb_formatHex, // Deprecated! Use color.formatHex.
+ formatHex: rgb_formatHex,
+ formatHex8: rgb_formatHex8,
+ formatRgb: rgb_formatRgb,
+ toString: rgb_formatRgb
+}));
+
+function rgb_formatHex() {
+ return `#${hex(this.r)}${hex(this.g)}${hex(this.b)}`;
+}
+
+function rgb_formatHex8() {
+ return `#${hex(this.r)}${hex(this.g)}${hex(this.b)}${hex((isNaN(this.opacity) ? 1 : this.opacity) * 255)}`;
+}
+
+function rgb_formatRgb() {
+ const a = clampa(this.opacity);
+ return `${a === 1 ? "rgb(" : "rgba("}${clampi(this.r)}, ${clampi(this.g)}, ${clampi(this.b)}${a === 1 ? ")" : `, ${a})`}`;
+}
+
+function clampa(opacity) {
+ return isNaN(opacity) ? 1 : Math.max(0, Math.min(1, opacity));
+}
+
+function clampi(value) {
+ return Math.max(0, Math.min(255, Math.round(value) || 0));
+}
+
+function hex(value) {
+ value = clampi(value);
+ return (value < 16 ? "0" : "") + value.toString(16);
+}
+
+function hsla(h, s, l, a) {
+ if (a <= 0) h = s = l = NaN;
+ else if (l <= 0 || l >= 1) h = s = NaN;
+ else if (s <= 0) h = NaN;
+ return new Hsl(h, s, l, a);
+}
+
+function hslConvert(o) {
+ if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+ if (!(o instanceof Color)) o = color(o);
+ if (!o) return new Hsl;
+ if (o instanceof Hsl) return o;
+ o = o.rgb();
+ var r = o.r / 255,
+ g = o.g / 255,
+ b = o.b / 255,
+ min = Math.min(r, g, b),
+ max = Math.max(r, g, b),
+ h = NaN,
+ s = max - min,
+ l = (max + min) / 2;
+ if (s) {
+ if (r === max) h = (g - b) / s + (g < b) * 6;
+ else if (g === max) h = (b - r) / s + 2;
+ else h = (r - g) / s + 4;
+ s /= l < 0.5 ? max + min : 2 - max - min;
+ h *= 60;
+ } else {
+ s = l > 0 && l < 1 ? 0 : h;
+ }
+ return new Hsl(h, s, l, o.opacity);
+}
+
+function hsl$2(h, s, l, opacity) {
+ return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Hsl(h, s, l, opacity) {
+ this.h = +h;
+ this.s = +s;
+ this.l = +l;
+ this.opacity = +opacity;
+}
+
+define(Hsl, hsl$2, extend(Color, {
+ brighter(k) {
+ k = k == null ? brighter : Math.pow(brighter, k);
+ return new Hsl(this.h, this.s, this.l * k, this.opacity);
+ },
+ darker(k) {
+ k = k == null ? darker : Math.pow(darker, k);
+ return new Hsl(this.h, this.s, this.l * k, this.opacity);
+ },
+ rgb() {
+ var h = this.h % 360 + (this.h < 0) * 360,
+ s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+ l = this.l,
+ m2 = l + (l < 0.5 ? l : 1 - l) * s,
+ m1 = 2 * l - m2;
+ return new Rgb(
+ hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
+ hsl2rgb(h, m1, m2),
+ hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
+ this.opacity
+ );
+ },
+ clamp() {
+ return new Hsl(clamph(this.h), clampt(this.s), clampt(this.l), clampa(this.opacity));
+ },
+ displayable() {
+ return (0 <= this.s && this.s <= 1 || isNaN(this.s))
+ && (0 <= this.l && this.l <= 1)
+ && (0 <= this.opacity && this.opacity <= 1);
+ },
+ formatHsl() {
+ const a = clampa(this.opacity);
+ return `${a === 1 ? "hsl(" : "hsla("}${clamph(this.h)}, ${clampt(this.s) * 100}%, ${clampt(this.l) * 100}%${a === 1 ? ")" : `, ${a})`}`;
+ }
+}));
+
+function clamph(value) {
+ value = (value || 0) % 360;
+ return value < 0 ? value + 360 : value;
+}
+
+function clampt(value) {
+ return Math.max(0, Math.min(1, value || 0));
+}
+
+/* From FvD 13.37, CSS Color Module Level 3 */
+function hsl2rgb(h, m1, m2) {
+ return (h < 60 ? m1 + (m2 - m1) * h / 60
+ : h < 180 ? m2
+ : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
+ : m1) * 255;
+}
+
+const radians$1 = Math.PI / 180;
+const degrees$2 = 180 / Math.PI;
+
+// https://observablehq.com/@mbostock/lab-and-rgb
+const K = 18,
+ Xn = 0.96422,
+ Yn = 1,
+ Zn = 0.82521,
+ t0$1 = 4 / 29,
+ t1$1 = 6 / 29,
+ t2 = 3 * t1$1 * t1$1,
+ t3 = t1$1 * t1$1 * t1$1;
+
+function labConvert(o) {
+ if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
+ if (o instanceof Hcl) return hcl2lab(o);
+ if (!(o instanceof Rgb)) o = rgbConvert(o);
+ var r = rgb2lrgb(o.r),
+ g = rgb2lrgb(o.g),
+ b = rgb2lrgb(o.b),
+ y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;
+ if (r === g && g === b) x = z = y; else {
+ x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);
+ z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);
+ }
+ return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
+}
+
+function gray(l, opacity) {
+ return new Lab(l, 0, 0, opacity == null ? 1 : opacity);
+}
+
+function lab$1(l, a, b, opacity) {
+ return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
+}
+
+function Lab(l, a, b, opacity) {
+ this.l = +l;
+ this.a = +a;
+ this.b = +b;
+ this.opacity = +opacity;
+}
+
+define(Lab, lab$1, extend(Color, {
+ brighter(k) {
+ return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+ },
+ darker(k) {
+ return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+ },
+ rgb() {
+ var y = (this.l + 16) / 116,
+ x = isNaN(this.a) ? y : y + this.a / 500,
+ z = isNaN(this.b) ? y : y - this.b / 200;
+ x = Xn * lab2xyz(x);
+ y = Yn * lab2xyz(y);
+ z = Zn * lab2xyz(z);
+ return new Rgb(
+ lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),
+ lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),
+ lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),
+ this.opacity
+ );
+ }
+}));
+
+function xyz2lab(t) {
+ return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0$1;
+}
+
+function lab2xyz(t) {
+ return t > t1$1 ? t * t * t : t2 * (t - t0$1);
+}
+
+function lrgb2rgb(x) {
+ return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
+}
+
+function rgb2lrgb(x) {
+ return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
+}
+
+function hclConvert(o) {
+ if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
+ if (!(o instanceof Lab)) o = labConvert(o);
+ if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);
+ var h = Math.atan2(o.b, o.a) * degrees$2;
+ return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
+}
+
+function lch(l, c, h, opacity) {
+ return arguments.length === 1 ? hclConvert(l) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
+function hcl$2(h, c, l, opacity) {
+ return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
+function Hcl(h, c, l, opacity) {
+ this.h = +h;
+ this.c = +c;
+ this.l = +l;
+ this.opacity = +opacity;
+}
+
+function hcl2lab(o) {
+ if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
+ var h = o.h * radians$1;
+ return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+}
+
+define(Hcl, hcl$2, extend(Color, {
+ brighter(k) {
+ return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
+ },
+ darker(k) {
+ return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
+ },
+ rgb() {
+ return hcl2lab(this).rgb();
+ }
+}));
+
+var A = -0.14861,
+ B$1 = +1.78277,
+ C = -0.29227,
+ D$1 = -0.90649,
+ E = +1.97294,
+ ED = E * D$1,
+ EB = E * B$1,
+ BC_DA = B$1 * C - D$1 * A;
+
+function cubehelixConvert(o) {
+ if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
+ if (!(o instanceof Rgb)) o = rgbConvert(o);
+ var r = o.r / 255,
+ g = o.g / 255,
+ b = o.b / 255,
+ l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
+ bl = b - l,
+ k = (E * (g - l) - C * bl) / D$1,
+ s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
+ h = s ? Math.atan2(k, bl) * degrees$2 - 120 : NaN;
+ return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
+}
+
+function cubehelix$3(h, s, l, opacity) {
+ return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Cubehelix(h, s, l, opacity) {
+ this.h = +h;
+ this.s = +s;
+ this.l = +l;
+ this.opacity = +opacity;
+}
+
+define(Cubehelix, cubehelix$3, extend(Color, {
+ brighter(k) {
+ k = k == null ? brighter : Math.pow(brighter, k);
+ return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+ },
+ darker(k) {
+ k = k == null ? darker : Math.pow(darker, k);
+ return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+ },
+ rgb() {
+ var h = isNaN(this.h) ? 0 : (this.h + 120) * radians$1,
+ l = +this.l,
+ a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
+ cosh = Math.cos(h),
+ sinh = Math.sin(h);
+ return new Rgb(
+ 255 * (l + a * (A * cosh + B$1 * sinh)),
+ 255 * (l + a * (C * cosh + D$1 * sinh)),
+ 255 * (l + a * (E * cosh)),
+ this.opacity
+ );
+ }
+}));
+
+function basis$1(t1, v0, v1, v2, v3) {
+ var t2 = t1 * t1, t3 = t2 * t1;
+ return ((1 - 3 * t1 + 3 * t2 - t3) * v0
+ + (4 - 6 * t2 + 3 * t3) * v1
+ + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
+ + t3 * v3) / 6;
+}
+
+function basis$2(values) {
+ var n = values.length - 1;
+ return function(t) {
+ var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
+ v1 = values[i],
+ v2 = values[i + 1],
+ v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
+ v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
+ return basis$1((t - i / n) * n, v0, v1, v2, v3);
+ };
+}
+
+function basisClosed$1(values) {
+ var n = values.length;
+ return function(t) {
+ var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
+ v0 = values[(i + n - 1) % n],
+ v1 = values[i % n],
+ v2 = values[(i + 1) % n],
+ v3 = values[(i + 2) % n];
+ return basis$1((t - i / n) * n, v0, v1, v2, v3);
+ };
+}
+
+var constant$8 = x => () => x;
+
+function linear$2(a, d) {
+ return function(t) {
+ return a + t * d;
+ };
+}
+
+function exponential$1(a, b, y) {
+ return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
+ return Math.pow(a + t * b, y);
+ };
+}
+
+function hue$1(a, b) {
+ var d = b - a;
+ return d ? linear$2(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$8(isNaN(a) ? b : a);
+}
+
+function gamma$1(y) {
+ return (y = +y) === 1 ? nogamma : function(a, b) {
+ return b - a ? exponential$1(a, b, y) : constant$8(isNaN(a) ? b : a);
+ };
+}
+
+function nogamma(a, b) {
+ var d = b - a;
+ return d ? linear$2(a, d) : constant$8(isNaN(a) ? b : a);
+}
+
+var interpolateRgb = (function rgbGamma(y) {
+ var color = gamma$1(y);
+
+ function rgb$1(start, end) {
+ var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+ g = color(start.g, end.g),
+ b = color(start.b, end.b),
+ opacity = nogamma(start.opacity, end.opacity);
+ return function(t) {
+ start.r = r(t);
+ start.g = g(t);
+ start.b = b(t);
+ start.opacity = opacity(t);
+ return start + "";
+ };
+ }
+
+ rgb$1.gamma = rgbGamma;
+
+ return rgb$1;
+})(1);
+
+function rgbSpline(spline) {
+ return function(colors) {
+ var n = colors.length,
+ r = new Array(n),
+ g = new Array(n),
+ b = new Array(n),
+ i, color;
+ for (i = 0; i < n; ++i) {
+ color = rgb(colors[i]);
+ r[i] = color.r || 0;
+ g[i] = color.g || 0;
+ b[i] = color.b || 0;
+ }
+ r = spline(r);
+ g = spline(g);
+ b = spline(b);
+ color.opacity = 1;
+ return function(t) {
+ color.r = r(t);
+ color.g = g(t);
+ color.b = b(t);
+ return color + "";
+ };
+ };
+}
+
+var rgbBasis = rgbSpline(basis$2);
+var rgbBasisClosed = rgbSpline(basisClosed$1);
+
+function numberArray(a, b) {
+ if (!b) b = [];
+ var n = a ? Math.min(b.length, a.length) : 0,
+ c = b.slice(),
+ i;
+ return function(t) {
+ for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;
+ return c;
+ };
+}
+
+function isNumberArray(x) {
+ return ArrayBuffer.isView(x) && !(x instanceof DataView);
+}
+
+function array$3(a, b) {
+ return (isNumberArray(b) ? numberArray : genericArray)(a, b);
+}
+
+function genericArray(a, b) {
+ var nb = b ? b.length : 0,
+ na = a ? Math.min(nb, a.length) : 0,
+ x = new Array(na),
+ c = new Array(nb),
+ i;
+
+ for (i = 0; i < na; ++i) x[i] = interpolate$2(a[i], b[i]);
+ for (; i < nb; ++i) c[i] = b[i];
+
+ return function(t) {
+ for (i = 0; i < na; ++i) c[i] = x[i](t);
+ return c;
+ };
+}
+
+function date$1(a, b) {
+ var d = new Date;
+ return a = +a, b = +b, function(t) {
+ return d.setTime(a * (1 - t) + b * t), d;
+ };
+}
+
+function interpolateNumber(a, b) {
+ return a = +a, b = +b, function(t) {
+ return a * (1 - t) + b * t;
+ };
+}
+
+function object$1(a, b) {
+ var i = {},
+ c = {},
+ k;
+
+ if (a === null || typeof a !== "object") a = {};
+ if (b === null || typeof b !== "object") b = {};
+
+ for (k in b) {
+ if (k in a) {
+ i[k] = interpolate$2(a[k], b[k]);
+ } else {
+ c[k] = b[k];
+ }
+ }
+
+ return function(t) {
+ for (k in i) c[k] = i[k](t);
+ return c;
+ };
+}
+
+var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+ reB = new RegExp(reA.source, "g");
+
+function zero(b) {
+ return function() {
+ return b;
+ };
+}
+
+function one(b) {
+ return function(t) {
+ return b(t) + "";
+ };
+}
+
+function interpolateString(a, b) {
+ var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
+ am, // current match in a
+ bm, // current match in b
+ bs, // string preceding current number in b, if any
+ i = -1, // index in s
+ s = [], // string constants and placeholders
+ q = []; // number interpolators
+
+ // Coerce inputs to strings.
+ a = a + "", b = b + "";
+
+ // Interpolate pairs of numbers in a & b.
+ while ((am = reA.exec(a))
+ && (bm = reB.exec(b))) {
+ if ((bs = bm.index) > bi) { // a string precedes the next number in b
+ bs = b.slice(bi, bs);
+ if (s[i]) s[i] += bs; // coalesce with previous string
+ else s[++i] = bs;
+ }
+ if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
+ if (s[i]) s[i] += bm; // coalesce with previous string
+ else s[++i] = bm;
+ } else { // interpolate non-matching numbers
+ s[++i] = null;
+ q.push({i: i, x: interpolateNumber(am, bm)});
+ }
+ bi = reB.lastIndex;
+ }
+
+ // Add remains of b.
+ if (bi < b.length) {
+ bs = b.slice(bi);
+ if (s[i]) s[i] += bs; // coalesce with previous string
+ else s[++i] = bs;
+ }
+
+ // Special optimization for only a single match.
+ // Otherwise, interpolate each of the numbers and rejoin the string.
+ return s.length < 2 ? (q[0]
+ ? one(q[0].x)
+ : zero(b))
+ : (b = q.length, function(t) {
+ for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
+ return s.join("");
+ });
+}
+
+function interpolate$2(a, b) {
+ var t = typeof b, c;
+ return b == null || t === "boolean" ? constant$8(b)
+ : (t === "number" ? interpolateNumber
+ : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
+ : b instanceof color ? interpolateRgb
+ : b instanceof Date ? date$1
+ : isNumberArray(b) ? numberArray
+ : Array.isArray(b) ? genericArray
+ : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object$1
+ : interpolateNumber)(a, b);
+}
+
+function discrete(range) {
+ var n = range.length;
+ return function(t) {
+ return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+ };
+}
+
+function hue(a, b) {
+ var i = hue$1(+a, +b);
+ return function(t) {
+ var x = i(t);
+ return x - 360 * Math.floor(x / 360);
+ };
+}
+
+function interpolateRound(a, b) {
+ return a = +a, b = +b, function(t) {
+ return Math.round(a * (1 - t) + b * t);
+ };
+}
+
+var degrees$1 = 180 / Math.PI;
+
+var identity$7 = {
+ translateX: 0,
+ translateY: 0,
+ rotate: 0,
+ skewX: 0,
+ scaleX: 1,
+ scaleY: 1
+};
+
+function decompose(a, b, c, d, e, f) {
+ var scaleX, scaleY, skewX;
+ if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+ if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+ if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+ if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+ return {
+ translateX: e,
+ translateY: f,
+ rotate: Math.atan2(b, a) * degrees$1,
+ skewX: Math.atan(skewX) * degrees$1,
+ scaleX: scaleX,
+ scaleY: scaleY
+ };
+}
+
+var svgNode;
+
+/* eslint-disable no-undef */
+function parseCss(value) {
+ const m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+ return m.isIdentity ? identity$7 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+}
+
+function parseSvg(value) {
+ if (value == null) return identity$7;
+ if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+ svgNode.setAttribute("transform", value);
+ if (!(value = svgNode.transform.baseVal.consolidate())) return identity$7;
+ value = value.matrix;
+ return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+}
+
+function interpolateTransform(parse, pxComma, pxParen, degParen) {
+
+ function pop(s) {
+ return s.length ? s.pop() + " " : "";
+ }
+
+ function translate(xa, ya, xb, yb, s, q) {
+ if (xa !== xb || ya !== yb) {
+ var i = s.push("translate(", null, pxComma, null, pxParen);
+ q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
+ } else if (xb || yb) {
+ s.push("translate(" + xb + pxComma + yb + pxParen);
+ }
+ }
+
+ function rotate(a, b, s, q) {
+ if (a !== b) {
+ if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
+ q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b)});
+ } else if (b) {
+ s.push(pop(s) + "rotate(" + b + degParen);
+ }
+ }
+
+ function skewX(a, b, s, q) {
+ if (a !== b) {
+ q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b)});
+ } else if (b) {
+ s.push(pop(s) + "skewX(" + b + degParen);
+ }
+ }
+
+ function scale(xa, ya, xb, yb, s, q) {
+ if (xa !== xb || ya !== yb) {
+ var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+ q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
+ } else if (xb !== 1 || yb !== 1) {
+ s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+ }
+ }
+
+ return function(a, b) {
+ var s = [], // string constants and placeholders
+ q = []; // number interpolators
+ a = parse(a), b = parse(b);
+ translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+ rotate(a.rotate, b.rotate, s, q);
+ skewX(a.skewX, b.skewX, s, q);
+ scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+ a = b = null; // gc
+ return function(t) {
+ var i = -1, n = q.length, o;
+ while (++i < n) s[(o = q[i]).i] = o.x(t);
+ return s.join("");
+ };
+ };
+}
+
+var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+
+var epsilon2$1 = 1e-12;
+
+function cosh(x) {
+ return ((x = Math.exp(x)) + 1 / x) / 2;
+}
+
+function sinh(x) {
+ return ((x = Math.exp(x)) - 1 / x) / 2;
+}
+
+function tanh(x) {
+ return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+}
+
+var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
+
+ // p0 = [ux0, uy0, w0]
+ // p1 = [ux1, uy1, w1]
+ function zoom(p0, p1) {
+ var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
+ ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
+ dx = ux1 - ux0,
+ dy = uy1 - uy0,
+ d2 = dx * dx + dy * dy,
+ i,
+ S;
+
+ // Special case for u0 ≅ u1.
+ if (d2 < epsilon2$1) {
+ S = Math.log(w1 / w0) / rho;
+ i = function(t) {
+ return [
+ ux0 + t * dx,
+ uy0 + t * dy,
+ w0 * Math.exp(rho * t * S)
+ ];
+ };
+ }
+
+ // General case.
+ else {
+ var d1 = Math.sqrt(d2),
+ b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+ b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+ r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+ r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+ S = (r1 - r0) / rho;
+ i = function(t) {
+ var s = t * S,
+ coshr0 = cosh(r0),
+ u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+ return [
+ ux0 + u * dx,
+ uy0 + u * dy,
+ w0 * coshr0 / cosh(rho * s + r0)
+ ];
+ };
+ }
+
+ i.duration = S * 1000 * rho / Math.SQRT2;
+
+ return i;
+ }
+
+ zoom.rho = function(_) {
+ var _1 = Math.max(1e-3, +_), _2 = _1 * _1, _4 = _2 * _2;
+ return zoomRho(_1, _2, _4);
+ };
+
+ return zoom;
+})(Math.SQRT2, 2, 4);
+
+function hsl(hue) {
+ return function(start, end) {
+ var h = hue((start = hsl$2(start)).h, (end = hsl$2(end)).h),
+ s = nogamma(start.s, end.s),
+ l = nogamma(start.l, end.l),
+ opacity = nogamma(start.opacity, end.opacity);
+ return function(t) {
+ start.h = h(t);
+ start.s = s(t);
+ start.l = l(t);
+ start.opacity = opacity(t);
+ return start + "";
+ };
+ }
+}
+
+var hsl$1 = hsl(hue$1);
+var hslLong = hsl(nogamma);
+
+function lab(start, end) {
+ var l = nogamma((start = lab$1(start)).l, (end = lab$1(end)).l),
+ a = nogamma(start.a, end.a),
+ b = nogamma(start.b, end.b),
+ opacity = nogamma(start.opacity, end.opacity);
+ return function(t) {
+ start.l = l(t);
+ start.a = a(t);
+ start.b = b(t);
+ start.opacity = opacity(t);
+ return start + "";
+ };
+}
+
+function hcl(hue) {
+ return function(start, end) {
+ var h = hue((start = hcl$2(start)).h, (end = hcl$2(end)).h),
+ c = nogamma(start.c, end.c),
+ l = nogamma(start.l, end.l),
+ opacity = nogamma(start.opacity, end.opacity);
+ return function(t) {
+ start.h = h(t);
+ start.c = c(t);
+ start.l = l(t);
+ start.opacity = opacity(t);
+ return start + "";
+ };
+ }
+}
+
+var hcl$1 = hcl(hue$1);
+var hclLong = hcl(nogamma);
+
+function cubehelix$1(hue) {
+ return (function cubehelixGamma(y) {
+ y = +y;
+
+ function cubehelix(start, end) {
+ var h = hue((start = cubehelix$3(start)).h, (end = cubehelix$3(end)).h),
+ s = nogamma(start.s, end.s),
+ l = nogamma(start.l, end.l),
+ opacity = nogamma(start.opacity, end.opacity);
+ return function(t) {
+ start.h = h(t);
+ start.s = s(t);
+ start.l = l(Math.pow(t, y));
+ start.opacity = opacity(t);
+ return start + "";
+ };
+ }
+
+ cubehelix.gamma = cubehelixGamma;
+
+ return cubehelix;
+ })(1);
+}
+
+var cubehelix$2 = cubehelix$1(hue$1);
+var cubehelixLong = cubehelix$1(nogamma);
+
+function piecewise(interpolate, values) {
+ if (values === undefined) values = interpolate, interpolate = interpolate$2;
+ var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);
+ while (i < n) I[i] = interpolate(v, v = values[++i]);
+ return function(t) {
+ var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
+ return I[i](t - i);
+ };
+}
+
+function quantize$1(interpolator, n) {
+ var samples = new Array(n);
+ for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
+ return samples;
+}
+
+var frame = 0, // is an animation frame pending?
+ timeout$1 = 0, // is a timeout pending?
+ interval$1 = 0, // are any timers active?
+ pokeDelay = 1000, // how frequently we check for clock skew
+ taskHead,
+ taskTail,
+ clockLast = 0,
+ clockNow = 0,
+ clockSkew = 0,
+ clock = typeof performance === "object" && performance.now ? performance : Date,
+ setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+function now() {
+ return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+}
+
+function clearNow() {
+ clockNow = 0;
+}
+
+function Timer() {
+ this._call =
+ this._time =
+ this._next = null;
+}
+
+Timer.prototype = timer.prototype = {
+ constructor: Timer,
+ restart: function(callback, delay, time) {
+ if (typeof callback !== "function") throw new TypeError("callback is not a function");
+ time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+ if (!this._next && taskTail !== this) {
+ if (taskTail) taskTail._next = this;
+ else taskHead = this;
+ taskTail = this;
+ }
+ this._call = callback;
+ this._time = time;
+ sleep();
+ },
+ stop: function() {
+ if (this._call) {
+ this._call = null;
+ this._time = Infinity;
+ sleep();
+ }
+ }
+};
+
+function timer(callback, delay, time) {
+ var t = new Timer;
+ t.restart(callback, delay, time);
+ return t;
+}
+
+function timerFlush() {
+ now(); // Get the current time, if not already set.
+ ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+ var t = taskHead, e;
+ while (t) {
+ if ((e = clockNow - t._time) >= 0) t._call.call(undefined, e);
+ t = t._next;
+ }
+ --frame;
+}
+
+function wake() {
+ clockNow = (clockLast = clock.now()) + clockSkew;
+ frame = timeout$1 = 0;
+ try {
+ timerFlush();
+ } finally {
+ frame = 0;
+ nap();
+ clockNow = 0;
+ }
+}
+
+function poke() {
+ var now = clock.now(), delay = now - clockLast;
+ if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+}
+
+function nap() {
+ var t0, t1 = taskHead, t2, time = Infinity;
+ while (t1) {
+ if (t1._call) {
+ if (time > t1._time) time = t1._time;
+ t0 = t1, t1 = t1._next;
+ } else {
+ t2 = t1._next, t1._next = null;
+ t1 = t0 ? t0._next = t2 : taskHead = t2;
+ }
+ }
+ taskTail = t0;
+ sleep(time);
+}
+
+function sleep(time) {
+ if (frame) return; // Soonest alarm already set, or will be.
+ if (timeout$1) timeout$1 = clearTimeout(timeout$1);
+ var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+ if (delay > 24) {
+ if (time < Infinity) timeout$1 = setTimeout(wake, time - clock.now() - clockSkew);
+ if (interval$1) interval$1 = clearInterval(interval$1);
+ } else {
+ if (!interval$1) clockLast = clock.now(), interval$1 = setInterval(poke, pokeDelay);
+ frame = 1, setFrame(wake);
+ }
+}
+
+function timeout(callback, delay, time) {
+ var t = new Timer;
+ delay = delay == null ? 0 : +delay;
+ t.restart(elapsed => {
+ t.stop();
+ callback(elapsed + delay);
+ }, delay, time);
+ return t;
+}
+
+function interval(callback, delay, time) {
+ var t = new Timer, total = delay;
+ if (delay == null) return t.restart(callback, delay, time), t;
+ t._restart = t.restart;
+ t.restart = function(callback, delay, time) {
+ delay = +delay, time = time == null ? now() : +time;
+ t._restart(function tick(elapsed) {
+ elapsed += total;
+ t._restart(tick, total += delay, time);
+ callback(elapsed);
+ }, delay, time);
+ };
+ t.restart(callback, delay, time);
+ return t;
+}
+
+var emptyOn = dispatch("start", "end", "cancel", "interrupt");
+var emptyTween = [];
+
+var CREATED = 0;
+var SCHEDULED = 1;
+var STARTING = 2;
+var STARTED = 3;
+var RUNNING = 4;
+var ENDING = 5;
+var ENDED = 6;
+
+function schedule(node, name, id, index, group, timing) {
+ var schedules = node.__transition;
+ if (!schedules) node.__transition = {};
+ else if (id in schedules) return;
+ create(node, id, {
+ name: name,
+ index: index, // For context during callback.
+ group: group, // For context during callback.
+ on: emptyOn,
+ tween: emptyTween,
+ time: timing.time,
+ delay: timing.delay,
+ duration: timing.duration,
+ ease: timing.ease,
+ timer: null,
+ state: CREATED
+ });
+}
+
+function init(node, id) {
+ var schedule = get(node, id);
+ if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+ return schedule;
+}
+
+function set(node, id) {
+ var schedule = get(node, id);
+ if (schedule.state > STARTED) throw new Error("too late; already running");
+ return schedule;
+}
+
+function get(node, id) {
+ var schedule = node.__transition;
+ if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+ return schedule;
+}
+
+function create(node, id, self) {
+ var schedules = node.__transition,
+ tween;
+
+ // Initialize the self timer when the transition is created.
+ // Note the actual delay is not known until the first callback!
+ schedules[id] = self;
+ self.timer = timer(schedule, 0, self.time);
+
+ function schedule(elapsed) {
+ self.state = SCHEDULED;
+ self.timer.restart(start, self.delay, self.time);
+
+ // If the elapsed delay is less than our first sleep, start immediately.
+ if (self.delay <= elapsed) start(elapsed - self.delay);
+ }
+
+ function start(elapsed) {
+ var i, j, n, o;
+
+ // If the state is not SCHEDULED, then we previously errored on start.
+ if (self.state !== SCHEDULED) return stop();
+
+ for (i in schedules) {
+ o = schedules[i];
+ if (o.name !== self.name) continue;
+
+ // While this element already has a starting transition during this frame,
+ // defer starting an interrupting transition until that transition has a
+ // chance to tick (and possibly end); see d3/d3-transition#54!
+ if (o.state === STARTED) return timeout(start);
+
+ // Interrupt the active transition, if any.
+ if (o.state === RUNNING) {
+ o.state = ENDED;
+ o.timer.stop();
+ o.on.call("interrupt", node, node.__data__, o.index, o.group);
+ delete schedules[i];
+ }
+
+ // Cancel any pre-empted transitions.
+ else if (+i < id) {
+ o.state = ENDED;
+ o.timer.stop();
+ o.on.call("cancel", node, node.__data__, o.index, o.group);
+ delete schedules[i];
+ }
+ }
+
+ // Defer the first tick to end of the current frame; see d3/d3#1576.
+ // Note the transition may be canceled after start and before the first tick!
+ // Note this must be scheduled before the start event; see d3/d3-transition#16!
+ // Assuming this is successful, subsequent callbacks go straight to tick.
+ timeout(function() {
+ if (self.state === STARTED) {
+ self.state = RUNNING;
+ self.timer.restart(tick, self.delay, self.time);
+ tick(elapsed);
+ }
+ });
+
+ // Dispatch the start event.
+ // Note this must be done before the tween are initialized.
+ self.state = STARTING;
+ self.on.call("start", node, node.__data__, self.index, self.group);
+ if (self.state !== STARTING) return; // interrupted
+ self.state = STARTED;
+
+ // Initialize the tween, deleting null tween.
+ tween = new Array(n = self.tween.length);
+ for (i = 0, j = -1; i < n; ++i) {
+ if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+ tween[++j] = o;
+ }
+ }
+ tween.length = j + 1;
+ }
+
+ function tick(elapsed) {
+ var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+ i = -1,
+ n = tween.length;
+
+ while (++i < n) {
+ tween[i].call(node, t);
+ }
+
+ // Dispatch the end event.
+ if (self.state === ENDING) {
+ self.on.call("end", node, node.__data__, self.index, self.group);
+ stop();
+ }
+ }
+
+ function stop() {
+ self.state = ENDED;
+ self.timer.stop();
+ delete schedules[id];
+ for (var i in schedules) return; // eslint-disable-line no-unused-vars
+ delete node.__transition;
+ }
+}
+
+function interrupt(node, name) {
+ var schedules = node.__transition,
+ schedule,
+ active,
+ empty = true,
+ i;
+
+ if (!schedules) return;
+
+ name = name == null ? null : name + "";
+
+ for (i in schedules) {
+ if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
+ active = schedule.state > STARTING && schedule.state < ENDING;
+ schedule.state = ENDED;
+ schedule.timer.stop();
+ schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+ delete schedules[i];
+ }
+
+ if (empty) delete node.__transition;
+}
+
+function selection_interrupt(name) {
+ return this.each(function() {
+ interrupt(this, name);
+ });
+}
+
+function tweenRemove(id, name) {
+ var tween0, tween1;
+ return function() {
+ var schedule = set(this, id),
+ tween = schedule.tween;
+
+ // If this node shared tween with the previous node,
+ // just assign the updated shared tween and we’re done!
+ // Otherwise, copy-on-write.
+ if (tween !== tween0) {
+ tween1 = tween0 = tween;
+ for (var i = 0, n = tween1.length; i < n; ++i) {
+ if (tween1[i].name === name) {
+ tween1 = tween1.slice();
+ tween1.splice(i, 1);
+ break;
+ }
+ }
+ }
+
+ schedule.tween = tween1;
+ };
+}
+
+function tweenFunction(id, name, value) {
+ var tween0, tween1;
+ if (typeof value !== "function") throw new Error;
+ return function() {
+ var schedule = set(this, id),
+ tween = schedule.tween;
+
+ // If this node shared tween with the previous node,
+ // just assign the updated shared tween and we’re done!
+ // Otherwise, copy-on-write.
+ if (tween !== tween0) {
+ tween1 = (tween0 = tween).slice();
+ for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
+ if (tween1[i].name === name) {
+ tween1[i] = t;
+ break;
+ }
+ }
+ if (i === n) tween1.push(t);
+ }
+
+ schedule.tween = tween1;
+ };
+}
+
+function transition_tween(name, value) {
+ var id = this._id;
+
+ name += "";
+
+ if (arguments.length < 2) {
+ var tween = get(this.node(), id).tween;
+ for (var i = 0, n = tween.length, t; i < n; ++i) {
+ if ((t = tween[i]).name === name) {
+ return t.value;
+ }
+ }
+ return null;
+ }
+
+ return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+}
+
+function tweenValue(transition, name, value) {
+ var id = transition._id;
+
+ transition.each(function() {
+ var schedule = set(this, id);
+ (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+ });
+
+ return function(node) {
+ return get(node, id).value[name];
+ };
+}
+
+function interpolate$1(a, b) {
+ var c;
+ return (typeof b === "number" ? interpolateNumber
+ : b instanceof color ? interpolateRgb
+ : (c = color(b)) ? (b = c, interpolateRgb)
+ : interpolateString)(a, b);
+}
+
+function attrRemove(name) {
+ return function() {
+ this.removeAttribute(name);
+ };
+}
+
+function attrRemoveNS(fullname) {
+ return function() {
+ this.removeAttributeNS(fullname.space, fullname.local);
+ };
+}
+
+function attrConstant(name, interpolate, value1) {
+ var string00,
+ string1 = value1 + "",
+ interpolate0;
+ return function() {
+ var string0 = this.getAttribute(name);
+ return string0 === string1 ? null
+ : string0 === string00 ? interpolate0
+ : interpolate0 = interpolate(string00 = string0, value1);
+ };
+}
+
+function attrConstantNS(fullname, interpolate, value1) {
+ var string00,
+ string1 = value1 + "",
+ interpolate0;
+ return function() {
+ var string0 = this.getAttributeNS(fullname.space, fullname.local);
+ return string0 === string1 ? null
+ : string0 === string00 ? interpolate0
+ : interpolate0 = interpolate(string00 = string0, value1);
+ };
+}
+
+function attrFunction(name, interpolate, value) {
+ var string00,
+ string10,
+ interpolate0;
+ return function() {
+ var string0, value1 = value(this), string1;
+ if (value1 == null) return void this.removeAttribute(name);
+ string0 = this.getAttribute(name);
+ string1 = value1 + "";
+ return string0 === string1 ? null
+ : string0 === string00 && string1 === string10 ? interpolate0
+ : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+ };
+}
+
+function attrFunctionNS(fullname, interpolate, value) {
+ var string00,
+ string10,
+ interpolate0;
+ return function() {
+ var string0, value1 = value(this), string1;
+ if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+ string0 = this.getAttributeNS(fullname.space, fullname.local);
+ string1 = value1 + "";
+ return string0 === string1 ? null
+ : string0 === string00 && string1 === string10 ? interpolate0
+ : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+ };
+}
+
+function transition_attr(name, value) {
+ var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
+ return this.attrTween(name, typeof value === "function"
+ ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value))
+ : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname)
+ : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
+}
+
+function attrInterpolate(name, i) {
+ return function(t) {
+ this.setAttribute(name, i.call(this, t));
+ };
+}
+
+function attrInterpolateNS(fullname, i) {
+ return function(t) {
+ this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+ };
+}
+
+function attrTweenNS(fullname, value) {
+ var t0, i0;
+ function tween() {
+ var i = value.apply(this, arguments);
+ if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+ return t0;
+ }
+ tween._value = value;
+ return tween;
+}
+
+function attrTween(name, value) {
+ var t0, i0;
+ function tween() {
+ var i = value.apply(this, arguments);
+ if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+ return t0;
+ }
+ tween._value = value;
+ return tween;
+}
+
+function transition_attrTween(name, value) {
+ var key = "attr." + name;
+ if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+ if (value == null) return this.tween(key, null);
+ if (typeof value !== "function") throw new Error;
+ var fullname = namespace(name);
+ return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+}
+
+function delayFunction(id, value) {
+ return function() {
+ init(this, id).delay = +value.apply(this, arguments);
+ };
+}
+
+function delayConstant(id, value) {
+ return value = +value, function() {
+ init(this, id).delay = value;
+ };
+}
+
+function transition_delay(value) {
+ var id = this._id;
+
+ return arguments.length
+ ? this.each((typeof value === "function"
+ ? delayFunction
+ : delayConstant)(id, value))
+ : get(this.node(), id).delay;
+}
+
+function durationFunction(id, value) {
+ return function() {
+ set(this, id).duration = +value.apply(this, arguments);
+ };
+}
+
+function durationConstant(id, value) {
+ return value = +value, function() {
+ set(this, id).duration = value;
+ };
+}
+
+function transition_duration(value) {
+ var id = this._id;
+
+ return arguments.length
+ ? this.each((typeof value === "function"
+ ? durationFunction
+ : durationConstant)(id, value))
+ : get(this.node(), id).duration;
+}
+
+function easeConstant(id, value) {
+ if (typeof value !== "function") throw new Error;
+ return function() {
+ set(this, id).ease = value;
+ };
+}
+
+function transition_ease(value) {
+ var id = this._id;
+
+ return arguments.length
+ ? this.each(easeConstant(id, value))
+ : get(this.node(), id).ease;
+}
+
+function easeVarying(id, value) {
+ return function() {
+ var v = value.apply(this, arguments);
+ if (typeof v !== "function") throw new Error;
+ set(this, id).ease = v;
+ };
+}
+
+function transition_easeVarying(value) {
+ if (typeof value !== "function") throw new Error;
+ return this.each(easeVarying(this._id, value));
+}
+
+function transition_filter(match) {
+ if (typeof match !== "function") match = matcher(match);
+
+ for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+ if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+ subgroup.push(node);
+ }
+ }
+ }
+
+ return new Transition(subgroups, this._parents, this._name, this._id);
+}
+
+function transition_merge(transition) {
+ if (transition._id !== this._id) throw new Error;
+
+ for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+ for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+ if (node = group0[i] || group1[i]) {
+ merge[i] = node;
+ }
+ }
+ }
+
+ for (; j < m0; ++j) {
+ merges[j] = groups0[j];
+ }
+
+ return new Transition(merges, this._parents, this._name, this._id);
+}
+
+function start(name) {
+ return (name + "").trim().split(/^|\s+/).every(function(t) {
+ var i = t.indexOf(".");
+ if (i >= 0) t = t.slice(0, i);
+ return !t || t === "start";
+ });
+}
+
+function onFunction(id, name, listener) {
+ var on0, on1, sit = start(name) ? init : set;
+ return function() {
+ var schedule = sit(this, id),
+ on = schedule.on;
+
+ // If this node shared a dispatch with the previous node,
+ // just assign the updated shared dispatch and we’re done!
+ // Otherwise, copy-on-write.
+ if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+
+ schedule.on = on1;
+ };
+}
+
+function transition_on(name, listener) {
+ var id = this._id;
+
+ return arguments.length < 2
+ ? get(this.node(), id).on.on(name)
+ : this.each(onFunction(id, name, listener));
+}
+
+function removeFunction(id) {
+ return function() {
+ var parent = this.parentNode;
+ for (var i in this.__transition) if (+i !== id) return;
+ if (parent) parent.removeChild(this);
+ };
+}
+
+function transition_remove() {
+ return this.on("end.remove", removeFunction(this._id));
+}
+
+function transition_select(select) {
+ var name = this._name,
+ id = this._id;
+
+ if (typeof select !== "function") select = selector(select);
+
+ for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+ if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+ if ("__data__" in node) subnode.__data__ = node.__data__;
+ subgroup[i] = subnode;
+ schedule(subgroup[i], name, id, i, subgroup, get(node, id));
+ }
+ }
+ }
+
+ return new Transition(subgroups, this._parents, name, id);
+}
+
+function transition_selectAll(select) {
+ var name = this._name,
+ id = this._id;
+
+ if (typeof select !== "function") select = selectorAll(select);
+
+ for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+ if (node = group[i]) {
+ for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {
+ if (child = children[k]) {
+ schedule(child, name, id, k, children, inherit);
+ }
+ }
+ subgroups.push(children);
+ parents.push(node);
+ }
+ }
+ }
+
+ return new Transition(subgroups, parents, name, id);
+}
+
+var Selection = selection.prototype.constructor;
+
+function transition_selection() {
+ return new Selection(this._groups, this._parents);
+}
+
+function styleNull(name, interpolate) {
+ var string00,
+ string10,
+ interpolate0;
+ return function() {
+ var string0 = styleValue(this, name),
+ string1 = (this.style.removeProperty(name), styleValue(this, name));
+ return string0 === string1 ? null
+ : string0 === string00 && string1 === string10 ? interpolate0
+ : interpolate0 = interpolate(string00 = string0, string10 = string1);
+ };
+}
+
+function styleRemove(name) {
+ return function() {
+ this.style.removeProperty(name);
+ };
+}
+
+function styleConstant(name, interpolate, value1) {
+ var string00,
+ string1 = value1 + "",
+ interpolate0;
+ return function() {
+ var string0 = styleValue(this, name);
+ return string0 === string1 ? null
+ : string0 === string00 ? interpolate0
+ : interpolate0 = interpolate(string00 = string0, value1);
+ };
+}
+
+function styleFunction(name, interpolate, value) {
+ var string00,
+ string10,
+ interpolate0;
+ return function() {
+ var string0 = styleValue(this, name),
+ value1 = value(this),
+ string1 = value1 + "";
+ if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+ return string0 === string1 ? null
+ : string0 === string00 && string1 === string10 ? interpolate0
+ : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+ };
+}
+
+function styleMaybeRemove(id, name) {
+ var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
+ return function() {
+ var schedule = set(this, id),
+ on = schedule.on,
+ listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined;
+
+ // If this node shared a dispatch with the previous node,
+ // just assign the updated shared dispatch and we’re done!
+ // Otherwise, copy-on-write.
+ if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+
+ schedule.on = on1;
+ };
+}
+
+function transition_style(name, value, priority) {
+ var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
+ return value == null ? this
+ .styleTween(name, styleNull(name, i))
+ .on("end.style." + name, styleRemove(name))
+ : typeof value === "function" ? this
+ .styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value)))
+ .each(styleMaybeRemove(this._id, name))
+ : this
+ .styleTween(name, styleConstant(name, i, value), priority)
+ .on("end.style." + name, null);
+}
+
+function styleInterpolate(name, i, priority) {
+ return function(t) {
+ this.style.setProperty(name, i.call(this, t), priority);
+ };
+}
+
+function styleTween(name, value, priority) {
+ var t, i0;
+ function tween() {
+ var i = value.apply(this, arguments);
+ if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+ return t;
+ }
+ tween._value = value;
+ return tween;
+}
+
+function transition_styleTween(name, value, priority) {
+ var key = "style." + (name += "");
+ if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+ if (value == null) return this.tween(key, null);
+ if (typeof value !== "function") throw new Error;
+ return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+}
+
+function textConstant(value) {
+ return function() {
+ this.textContent = value;
+ };
+}
+
+function textFunction(value) {
+ return function() {
+ var value1 = value(this);
+ this.textContent = value1 == null ? "" : value1;
+ };
+}
+
+function transition_text(value) {
+ return this.tween("text", typeof value === "function"
+ ? textFunction(tweenValue(this, "text", value))
+ : textConstant(value == null ? "" : value + ""));
+}
+
+function textInterpolate(i) {
+ return function(t) {
+ this.textContent = i.call(this, t);
+ };
+}
+
+function textTween(value) {
+ var t0, i0;
+ function tween() {
+ var i = value.apply(this, arguments);
+ if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+ return t0;
+ }
+ tween._value = value;
+ return tween;
+}
+
+function transition_textTween(value) {
+ var key = "text";
+ if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+ if (value == null) return this.tween(key, null);
+ if (typeof value !== "function") throw new Error;
+ return this.tween(key, textTween(value));
+}
+
+function transition_transition() {
+ var name = this._name,
+ id0 = this._id,
+ id1 = newId();
+
+ for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+ if (node = group[i]) {
+ var inherit = get(node, id0);
+ schedule(node, name, id1, i, group, {
+ time: inherit.time + inherit.delay + inherit.duration,
+ delay: 0,
+ duration: inherit.duration,
+ ease: inherit.ease
+ });
+ }
+ }
+ }
+
+ return new Transition(groups, this._parents, name, id1);
+}
+
+function transition_end() {
+ var on0, on1, that = this, id = that._id, size = that.size();
+ return new Promise(function(resolve, reject) {
+ var cancel = {value: reject},
+ end = {value: function() { if (--size === 0) resolve(); }};
+
+ that.each(function() {
+ var schedule = set(this, id),
+ on = schedule.on;
+
+ // If this node shared a dispatch with the previous node,
+ // just assign the updated shared dispatch and we’re done!
+ // Otherwise, copy-on-write.
+ if (on !== on0) {
+ on1 = (on0 = on).copy();
+ on1._.cancel.push(cancel);
+ on1._.interrupt.push(cancel);
+ on1._.end.push(end);
+ }
+
+ schedule.on = on1;
+ });
+
+ // The selection was empty, resolve end immediately
+ if (size === 0) resolve();
+ });
+}
+
+var id = 0;
+
+function Transition(groups, parents, name, id) {
+ this._groups = groups;
+ this._parents = parents;
+ this._name = name;
+ this._id = id;
+}
+
+function transition(name) {
+ return selection().transition(name);
+}
+
+function newId() {
+ return ++id;
+}
+
+var selection_prototype = selection.prototype;
+
+Transition.prototype = transition.prototype = {
+ constructor: Transition,
+ select: transition_select,
+ selectAll: transition_selectAll,
+ selectChild: selection_prototype.selectChild,
+ selectChildren: selection_prototype.selectChildren,
+ filter: transition_filter,
+ merge: transition_merge,
+ selection: transition_selection,
+ transition: transition_transition,
+ call: selection_prototype.call,
+ nodes: selection_prototype.nodes,
+ node: selection_prototype.node,
+ size: selection_prototype.size,
+ empty: selection_prototype.empty,
+ each: selection_prototype.each,
+ on: transition_on,
+ attr: transition_attr,
+ attrTween: transition_attrTween,
+ style: transition_style,
+ styleTween: transition_styleTween,
+ text: transition_text,
+ textTween: transition_textTween,
+ remove: transition_remove,
+ tween: transition_tween,
+ delay: transition_delay,
+ duration: transition_duration,
+ ease: transition_ease,
+ easeVarying: transition_easeVarying,
+ end: transition_end,
+ [Symbol.iterator]: selection_prototype[Symbol.iterator]
+};
+
+const linear$1 = t => +t;
+
+function quadIn(t) {
+ return t * t;
+}
+
+function quadOut(t) {
+ return t * (2 - t);
+}
+
+function quadInOut(t) {
+ return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
+}
+
+function cubicIn(t) {
+ return t * t * t;
+}
+
+function cubicOut(t) {
+ return --t * t * t + 1;
+}
+
+function cubicInOut(t) {
+ return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+}
+
+var exponent$1 = 3;
+
+var polyIn = (function custom(e) {
+ e = +e;
+
+ function polyIn(t) {
+ return Math.pow(t, e);
+ }
+
+ polyIn.exponent = custom;
+
+ return polyIn;
+})(exponent$1);
+
+var polyOut = (function custom(e) {
+ e = +e;
+
+ function polyOut(t) {
+ return 1 - Math.pow(1 - t, e);
+ }
+
+ polyOut.exponent = custom;
+
+ return polyOut;
+})(exponent$1);
+
+var polyInOut = (function custom(e) {
+ e = +e;
+
+ function polyInOut(t) {
+ return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
+ }
+
+ polyInOut.exponent = custom;
+
+ return polyInOut;
+})(exponent$1);
+
+var pi$4 = Math.PI,
+ halfPi$3 = pi$4 / 2;
+
+function sinIn(t) {
+ return (+t === 1) ? 1 : 1 - Math.cos(t * halfPi$3);
+}
+
+function sinOut(t) {
+ return Math.sin(t * halfPi$3);
+}
+
+function sinInOut(t) {
+ return (1 - Math.cos(pi$4 * t)) / 2;
+}
+
+// tpmt is two power minus ten times t scaled to [0,1]
+function tpmt(x) {
+ return (Math.pow(2, -10 * x) - 0.0009765625) * 1.0009775171065494;
+}
+
+function expIn(t) {
+ return tpmt(1 - +t);
+}
+
+function expOut(t) {
+ return 1 - tpmt(t);
+}
+
+function expInOut(t) {
+ return ((t *= 2) <= 1 ? tpmt(1 - t) : 2 - tpmt(t - 1)) / 2;
+}
+
+function circleIn(t) {
+ return 1 - Math.sqrt(1 - t * t);
+}
+
+function circleOut(t) {
+ return Math.sqrt(1 - --t * t);
+}
+
+function circleInOut(t) {
+ return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
+}
+
+var b1 = 4 / 11,
+ b2 = 6 / 11,
+ b3 = 8 / 11,
+ b4 = 3 / 4,
+ b5 = 9 / 11,
+ b6 = 10 / 11,
+ b7 = 15 / 16,
+ b8 = 21 / 22,
+ b9 = 63 / 64,
+ b0 = 1 / b1 / b1;
+
+function bounceIn(t) {
+ return 1 - bounceOut(1 - t);
+}
+
+function bounceOut(t) {
+ return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
+}
+
+function bounceInOut(t) {
+ return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
+}
+
+var overshoot = 1.70158;
+
+var backIn = (function custom(s) {
+ s = +s;
+
+ function backIn(t) {
+ return (t = +t) * t * (s * (t - 1) + t);
+ }
+
+ backIn.overshoot = custom;
+
+ return backIn;
+})(overshoot);
+
+var backOut = (function custom(s) {
+ s = +s;
+
+ function backOut(t) {
+ return --t * t * ((t + 1) * s + t) + 1;
+ }
+
+ backOut.overshoot = custom;
+
+ return backOut;
+})(overshoot);
+
+var backInOut = (function custom(s) {
+ s = +s;
+
+ function backInOut(t) {
+ return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
+ }
+
+ backInOut.overshoot = custom;
+
+ return backInOut;
+})(overshoot);
+
+var tau$5 = 2 * Math.PI,
+ amplitude = 1,
+ period = 0.3;
+
+var elasticIn = (function custom(a, p) {
+ var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau$5);
+
+ function elasticIn(t) {
+ return a * tpmt(-(--t)) * Math.sin((s - t) / p);
+ }
+
+ elasticIn.amplitude = function(a) { return custom(a, p * tau$5); };
+ elasticIn.period = function(p) { return custom(a, p); };
+
+ return elasticIn;
+})(amplitude, period);
+
+var elasticOut = (function custom(a, p) {
+ var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau$5);
+
+ function elasticOut(t) {
+ return 1 - a * tpmt(t = +t) * Math.sin((t + s) / p);
+ }
+
+ elasticOut.amplitude = function(a) { return custom(a, p * tau$5); };
+ elasticOut.period = function(p) { return custom(a, p); };
+
+ return elasticOut;
+})(amplitude, period);
+
+var elasticInOut = (function custom(a, p) {
+ var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau$5);
+
+ function elasticInOut(t) {
+ return ((t = t * 2 - 1) < 0
+ ? a * tpmt(-t) * Math.sin((s - t) / p)
+ : 2 - a * tpmt(t) * Math.sin((s + t) / p)) / 2;
+ }
+
+ elasticInOut.amplitude = function(a) { return custom(a, p * tau$5); };
+ elasticInOut.period = function(p) { return custom(a, p); };
+
+ return elasticInOut;
+})(amplitude, period);
+
+var defaultTiming = {
+ time: null, // Set on use.
+ delay: 0,
+ duration: 250,
+ ease: cubicInOut
+};
+
+function inherit(node, id) {
+ var timing;
+ while (!(timing = node.__transition) || !(timing = timing[id])) {
+ if (!(node = node.parentNode)) {
+ throw new Error(`transition ${id} not found`);
+ }
+ }
+ return timing;
+}
+
+function selection_transition(name) {
+ var id,
+ timing;
+
+ if (name instanceof Transition) {
+ id = name._id, name = name._name;
+ } else {
+ id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+ }
+
+ for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+ for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+ if (node = group[i]) {
+ schedule(node, name, id, i, group, timing || inherit(node, id));
+ }
+ }
+ }
+
+ return new Transition(groups, this._parents, name, id);
+}
+
+selection.prototype.interrupt = selection_interrupt;
+selection.prototype.transition = selection_transition;
+
+var root = [null];
+
+function active(node, name) {
+ var schedules = node.__transition,
+ schedule,
+ i;
+
+ if (schedules) {
+ name = name == null ? null : name + "";
+ for (i in schedules) {
+ if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
+ return new Transition([[node]], root, name, +i);
+ }
+ }
+ }
+
+ return null;
+}
+
+var constant$7 = x => () => x;
+
+function BrushEvent(type, {
+ sourceEvent,
+ target,
+ selection,
+ mode,
+ dispatch
+}) {
+ Object.defineProperties(this, {
+ type: {value: type, enumerable: true, configurable: true},
+ sourceEvent: {value: sourceEvent, enumerable: true, configurable: true},
+ target: {value: target, enumerable: true, configurable: true},
+ selection: {value: selection, enumerable: true, configurable: true},
+ mode: {value: mode, enumerable: true, configurable: true},
+ _: {value: dispatch}
+ });
+}
+
+function nopropagation$1(event) {
+ event.stopImmediatePropagation();
+}
+
+function noevent$1(event) {
+ event.preventDefault();
+ event.stopImmediatePropagation();
+}
+
+var MODE_DRAG = {name: "drag"},
+ MODE_SPACE = {name: "space"},
+ MODE_HANDLE = {name: "handle"},
+ MODE_CENTER = {name: "center"};
+
+const {abs: abs$3, max: max$2, min: min$1} = Math;
+
+function number1(e) {
+ return [+e[0], +e[1]];
+}
+
+function number2(e) {
+ return [number1(e[0]), number1(e[1])];
+}
+
+var X = {
+ name: "x",
+ handles: ["w", "e"].map(type),
+ input: function(x, e) { return x == null ? null : [[+x[0], e[0][1]], [+x[1], e[1][1]]]; },
+ output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
+};
+
+var Y = {
+ name: "y",
+ handles: ["n", "s"].map(type),
+ input: function(y, e) { return y == null ? null : [[e[0][0], +y[0]], [e[1][0], +y[1]]]; },
+ output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
+};
+
+var XY = {
+ name: "xy",
+ handles: ["n", "w", "e", "s", "nw", "ne", "sw", "se"].map(type),
+ input: function(xy) { return xy == null ? null : number2(xy); },
+ output: function(xy) { return xy; }
+};
+
+var cursors = {
+ overlay: "crosshair",
+ selection: "move",
+ n: "ns-resize",
+ e: "ew-resize",
+ s: "ns-resize",
+ w: "ew-resize",
+ nw: "nwse-resize",
+ ne: "nesw-resize",
+ se: "nwse-resize",
+ sw: "nesw-resize"
+};
+
+var flipX = {
+ e: "w",
+ w: "e",
+ nw: "ne",
+ ne: "nw",
+ se: "sw",
+ sw: "se"
+};
+
+var flipY = {
+ n: "s",
+ s: "n",
+ nw: "sw",
+ ne: "se",
+ se: "ne",
+ sw: "nw"
+};
+
+var signsX = {
+ overlay: +1,
+ selection: +1,
+ n: null,
+ e: +1,
+ s: null,
+ w: -1,
+ nw: -1,
+ ne: +1,
+ se: +1,
+ sw: -1
+};
+
+var signsY = {
+ overlay: +1,
+ selection: +1,
+ n: -1,
+ e: null,
+ s: +1,
+ w: null,
+ nw: -1,
+ ne: -1,
+ se: +1,
+ sw: +1
+};
+
+function type(t) {
+ return {type: t};
+}
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter$1(event) {
+ return !event.ctrlKey && !event.button;
+}
+
+function defaultExtent$1() {
+ var svg = this.ownerSVGElement || this;
+ if (svg.hasAttribute("viewBox")) {
+ svg = svg.viewBox.baseVal;
+ return [[svg.x, svg.y], [svg.x + svg.width, svg.y + svg.height]];
+ }
+ return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
+}
+
+function defaultTouchable$1() {
+ return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
+// Like d3.local, but with the name “__brush” rather than auto-generated.
+function local(node) {
+ while (!node.__brush) if (!(node = node.parentNode)) return;
+ return node.__brush;
+}
+
+function empty(extent) {
+ return extent[0][0] === extent[1][0]
+ || extent[0][1] === extent[1][1];
+}
+
+function brushSelection(node) {
+ var state = node.__brush;
+ return state ? state.dim.output(state.selection) : null;
+}
+
+function brushX() {
+ return brush$1(X);
+}
+
+function brushY() {
+ return brush$1(Y);
+}
+
+function brush() {
+ return brush$1(XY);
+}
+
+function brush$1(dim) {
+ var extent = defaultExtent$1,
+ filter = defaultFilter$1,
+ touchable = defaultTouchable$1,
+ keys = true,
+ listeners = dispatch("start", "brush", "end"),
+ handleSize = 6,
+ touchending;
+
+ function brush(group) {
+ var overlay = group
+ .property("__brush", initialize)
+ .selectAll(".overlay")
+ .data([type("overlay")]);
+
+ overlay.enter().append("rect")
+ .attr("class", "overlay")
+ .attr("pointer-events", "all")
+ .attr("cursor", cursors.overlay)
+ .merge(overlay)
+ .each(function() {
+ var extent = local(this).extent;
+ select(this)
+ .attr("x", extent[0][0])
+ .attr("y", extent[0][1])
+ .attr("width", extent[1][0] - extent[0][0])
+ .attr("height", extent[1][1] - extent[0][1]);
+ });
+
+ group.selectAll(".selection")
+ .data([type("selection")])
+ .enter().append("rect")
+ .attr("class", "selection")
+ .attr("cursor", cursors.selection)
+ .attr("fill", "#777")
+ .attr("fill-opacity", 0.3)
+ .attr("stroke", "#fff")
+ .attr("shape-rendering", "crispEdges");
+
+ var handle = group.selectAll(".handle")
+ .data(dim.handles, function(d) { return d.type; });
+
+ handle.exit().remove();
+
+ handle.enter().append("rect")
+ .attr("class", function(d) { return "handle handle--" + d.type; })
+ .attr("cursor", function(d) { return cursors[d.type]; });
+
+ group
+ .each(redraw)
+ .attr("fill", "none")
+ .attr("pointer-events", "all")
+ .on("mousedown.brush", started)
+ .filter(touchable)
+ .on("touchstart.brush", started)
+ .on("touchmove.brush", touchmoved)
+ .on("touchend.brush touchcancel.brush", touchended)
+ .style("touch-action", "none")
+ .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+ }
+
+ brush.move = function(group, selection, event) {
+ if (group.tween) {
+ group
+ .on("start.brush", function(event) { emitter(this, arguments).beforestart().start(event); })
+ .on("interrupt.brush end.brush", function(event) { emitter(this, arguments).end(event); })
+ .tween("brush", function() {
+ var that = this,
+ state = that.__brush,
+ emit = emitter(that, arguments),
+ selection0 = state.selection,
+ selection1 = dim.input(typeof selection === "function" ? selection.apply(this, arguments) : selection, state.extent),
+ i = interpolate$2(selection0, selection1);
+
+ function tween(t) {
+ state.selection = t === 1 && selection1 === null ? null : i(t);
+ redraw.call(that);
+ emit.brush();
+ }
+
+ return selection0 !== null && selection1 !== null ? tween : tween(1);
+ });
+ } else {
+ group
+ .each(function() {
+ var that = this,
+ args = arguments,
+ state = that.__brush,
+ selection1 = dim.input(typeof selection === "function" ? selection.apply(that, args) : selection, state.extent),
+ emit = emitter(that, args).beforestart();
+
+ interrupt(that);
+ state.selection = selection1 === null ? null : selection1;
+ redraw.call(that);
+ emit.start(event).brush(event).end(event);
+ });
+ }
+ };
+
+ brush.clear = function(group, event) {
+ brush.move(group, null, event);
+ };
+
+ function redraw() {
+ var group = select(this),
+ selection = local(this).selection;
+
+ if (selection) {
+ group.selectAll(".selection")
+ .style("display", null)
+ .attr("x", selection[0][0])
+ .attr("y", selection[0][1])
+ .attr("width", selection[1][0] - selection[0][0])
+ .attr("height", selection[1][1] - selection[0][1]);
+
+ group.selectAll(".handle")
+ .style("display", null)
+ .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection[1][0] - handleSize / 2 : selection[0][0] - handleSize / 2; })
+ .attr("y", function(d) { return d.type[0] === "s" ? selection[1][1] - handleSize / 2 : selection[0][1] - handleSize / 2; })
+ .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection[1][0] - selection[0][0] + handleSize : handleSize; })
+ .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection[1][1] - selection[0][1] + handleSize : handleSize; });
+ }
+
+ else {
+ group.selectAll(".selection,.handle")
+ .style("display", "none")
+ .attr("x", null)
+ .attr("y", null)
+ .attr("width", null)
+ .attr("height", null);
+ }
+ }
+
+ function emitter(that, args, clean) {
+ var emit = that.__brush.emitter;
+ return emit && (!clean || !emit.clean) ? emit : new Emitter(that, args, clean);
+ }
+
+ function Emitter(that, args, clean) {
+ this.that = that;
+ this.args = args;
+ this.state = that.__brush;
+ this.active = 0;
+ this.clean = clean;
+ }
+
+ Emitter.prototype = {
+ beforestart: function() {
+ if (++this.active === 1) this.state.emitter = this, this.starting = true;
+ return this;
+ },
+ start: function(event, mode) {
+ if (this.starting) this.starting = false, this.emit("start", event, mode);
+ else this.emit("brush", event);
+ return this;
+ },
+ brush: function(event, mode) {
+ this.emit("brush", event, mode);
+ return this;
+ },
+ end: function(event, mode) {
+ if (--this.active === 0) delete this.state.emitter, this.emit("end", event, mode);
+ return this;
+ },
+ emit: function(type, event, mode) {
+ var d = select(this.that).datum();
+ listeners.call(
+ type,
+ this.that,
+ new BrushEvent(type, {
+ sourceEvent: event,
+ target: brush,
+ selection: dim.output(this.state.selection),
+ mode,
+ dispatch: listeners
+ }),
+ d
+ );
+ }
+ };
+
+ function started(event) {
+ if (touchending && !event.touches) return;
+ if (!filter.apply(this, arguments)) return;
+
+ var that = this,
+ type = event.target.__data__.type,
+ mode = (keys && event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (keys && event.altKey ? MODE_CENTER : MODE_HANDLE),
+ signX = dim === Y ? null : signsX[type],
+ signY = dim === X ? null : signsY[type],
+ state = local(that),
+ extent = state.extent,
+ selection = state.selection,
+ W = extent[0][0], w0, w1,
+ N = extent[0][1], n0, n1,
+ E = extent[1][0], e0, e1,
+ S = extent[1][1], s0, s1,
+ dx = 0,
+ dy = 0,
+ moving,
+ shifting = signX && signY && keys && event.shiftKey,
+ lockX,
+ lockY,
+ points = Array.from(event.touches || [event], t => {
+ const i = t.identifier;
+ t = pointer(t, that);
+ t.point0 = t.slice();
+ t.identifier = i;
+ return t;
+ });
+
+ interrupt(that);
+ var emit = emitter(that, arguments, true).beforestart();
+
+ if (type === "overlay") {
+ if (selection) moving = true;
+ const pts = [points[0], points[1] || points[0]];
+ state.selection = selection = [[
+ w0 = dim === Y ? W : min$1(pts[0][0], pts[1][0]),
+ n0 = dim === X ? N : min$1(pts[0][1], pts[1][1])
+ ], [
+ e0 = dim === Y ? E : max$2(pts[0][0], pts[1][0]),
+ s0 = dim === X ? S : max$2(pts[0][1], pts[1][1])
+ ]];
+ if (points.length > 1) move(event);
+ } else {
+ w0 = selection[0][0];
+ n0 = selection[0][1];
+ e0 = selection[1][0];
+ s0 = selection[1][1];
+ }
+
+ w1 = w0;
+ n1 = n0;
+ e1 = e0;
+ s1 = s0;
+
+ var group = select(that)
+ .attr("pointer-events", "none");
+
+ var overlay = group.selectAll(".overlay")
+ .attr("cursor", cursors[type]);
+
+ if (event.touches) {
+ emit.moved = moved;
+ emit.ended = ended;
+ } else {
+ var view = select(event.view)
+ .on("mousemove.brush", moved, true)
+ .on("mouseup.brush", ended, true);
+ if (keys) view
+ .on("keydown.brush", keydowned, true)
+ .on("keyup.brush", keyupped, true);
+
+ dragDisable(event.view);
+ }
+
+ redraw.call(that);
+ emit.start(event, mode.name);
+
+ function moved(event) {
+ for (const p of event.changedTouches || [event]) {
+ for (const d of points)
+ if (d.identifier === p.identifier) d.cur = pointer(p, that);
+ }
+ if (shifting && !lockX && !lockY && points.length === 1) {
+ const point = points[0];
+ if (abs$3(point.cur[0] - point[0]) > abs$3(point.cur[1] - point[1]))
+ lockY = true;
+ else
+ lockX = true;
+ }
+ for (const point of points)
+ if (point.cur) point[0] = point.cur[0], point[1] = point.cur[1];
+ moving = true;
+ noevent$1(event);
+ move(event);
+ }
+
+ function move(event) {
+ const point = points[0], point0 = point.point0;
+ var t;
+
+ dx = point[0] - point0[0];
+ dy = point[1] - point0[1];
+
+ switch (mode) {
+ case MODE_SPACE:
+ case MODE_DRAG: {
+ if (signX) dx = max$2(W - w0, min$1(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;
+ if (signY) dy = max$2(N - n0, min$1(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;
+ break;
+ }
+ case MODE_HANDLE: {
+ if (points[1]) {
+ if (signX) w1 = max$2(W, min$1(E, points[0][0])), e1 = max$2(W, min$1(E, points[1][0])), signX = 1;
+ if (signY) n1 = max$2(N, min$1(S, points[0][1])), s1 = max$2(N, min$1(S, points[1][1])), signY = 1;
+ } else {
+ if (signX < 0) dx = max$2(W - w0, min$1(E - w0, dx)), w1 = w0 + dx, e1 = e0;
+ else if (signX > 0) dx = max$2(W - e0, min$1(E - e0, dx)), w1 = w0, e1 = e0 + dx;
+ if (signY < 0) dy = max$2(N - n0, min$1(S - n0, dy)), n1 = n0 + dy, s1 = s0;
+ else if (signY > 0) dy = max$2(N - s0, min$1(S - s0, dy)), n1 = n0, s1 = s0 + dy;
+ }
+ break;
+ }
+ case MODE_CENTER: {
+ if (signX) w1 = max$2(W, min$1(E, w0 - dx * signX)), e1 = max$2(W, min$1(E, e0 + dx * signX));
+ if (signY) n1 = max$2(N, min$1(S, n0 - dy * signY)), s1 = max$2(N, min$1(S, s0 + dy * signY));
+ break;
+ }
+ }
+
+ if (e1 < w1) {
+ signX *= -1;
+ t = w0, w0 = e0, e0 = t;
+ t = w1, w1 = e1, e1 = t;
+ if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
+ }
+
+ if (s1 < n1) {
+ signY *= -1;
+ t = n0, n0 = s0, s0 = t;
+ t = n1, n1 = s1, s1 = t;
+ if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
+ }
+
+ if (state.selection) selection = state.selection; // May be set by brush.move!
+ if (lockX) w1 = selection[0][0], e1 = selection[1][0];
+ if (lockY) n1 = selection[0][1], s1 = selection[1][1];
+
+ if (selection[0][0] !== w1
+ || selection[0][1] !== n1
+ || selection[1][0] !== e1
+ || selection[1][1] !== s1) {
+ state.selection = [[w1, n1], [e1, s1]];
+ redraw.call(that);
+ emit.brush(event, mode.name);
+ }
+ }
+
+ function ended(event) {
+ nopropagation$1(event);
+ if (event.touches) {
+ if (event.touches.length) return;
+ if (touchending) clearTimeout(touchending);
+ touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+ } else {
+ yesdrag(event.view, moving);
+ view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
+ }
+ group.attr("pointer-events", "all");
+ overlay.attr("cursor", cursors.overlay);
+ if (state.selection) selection = state.selection; // May be set by brush.move (on start)!
+ if (empty(selection)) state.selection = null, redraw.call(that);
+ emit.end(event, mode.name);
+ }
+
+ function keydowned(event) {
+ switch (event.keyCode) {
+ case 16: { // SHIFT
+ shifting = signX && signY;
+ break;
+ }
+ case 18: { // ALT
+ if (mode === MODE_HANDLE) {
+ if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
+ if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
+ mode = MODE_CENTER;
+ move(event);
+ }
+ break;
+ }
+ case 32: { // SPACE; takes priority over ALT
+ if (mode === MODE_HANDLE || mode === MODE_CENTER) {
+ if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;
+ if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;
+ mode = MODE_SPACE;
+ overlay.attr("cursor", cursors.selection);
+ move(event);
+ }
+ break;
+ }
+ default: return;
+ }
+ noevent$1(event);
+ }
+
+ function keyupped(event) {
+ switch (event.keyCode) {
+ case 16: { // SHIFT
+ if (shifting) {
+ lockX = lockY = shifting = false;
+ move(event);
+ }
+ break;
+ }
+ case 18: { // ALT
+ if (mode === MODE_CENTER) {
+ if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
+ if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
+ mode = MODE_HANDLE;
+ move(event);
+ }
+ break;
+ }
+ case 32: { // SPACE
+ if (mode === MODE_SPACE) {
+ if (event.altKey) {
+ if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
+ if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
+ mode = MODE_CENTER;
+ } else {
+ if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
+ if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
+ mode = MODE_HANDLE;
+ }
+ overlay.attr("cursor", cursors[type]);
+ move(event);
+ }
+ break;
+ }
+ default: return;
+ }
+ noevent$1(event);
+ }
+ }
+
+ function touchmoved(event) {
+ emitter(this, arguments).moved(event);
+ }
+
+ function touchended(event) {
+ emitter(this, arguments).ended(event);
+ }
+
+ function initialize() {
+ var state = this.__brush || {selection: null};
+ state.extent = number2(extent.apply(this, arguments));
+ state.dim = dim;
+ return state;
+ }
+
+ brush.extent = function(_) {
+ return arguments.length ? (extent = typeof _ === "function" ? _ : constant$7(number2(_)), brush) : extent;
+ };
+
+ brush.filter = function(_) {
+ return arguments.length ? (filter = typeof _ === "function" ? _ : constant$7(!!_), brush) : filter;
+ };
+
+ brush.touchable = function(_) {
+ return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$7(!!_), brush) : touchable;
+ };
+
+ brush.handleSize = function(_) {
+ return arguments.length ? (handleSize = +_, brush) : handleSize;
+ };
+
+ brush.keyModifiers = function(_) {
+ return arguments.length ? (keys = !!_, brush) : keys;
+ };
+
+ brush.on = function() {
+ var value = listeners.on.apply(listeners, arguments);
+ return value === listeners ? brush : value;
+ };
+
+ return brush;
+}
+
+var abs$2 = Math.abs;
+var cos$2 = Math.cos;
+var sin$2 = Math.sin;
+var pi$3 = Math.PI;
+var halfPi$2 = pi$3 / 2;
+var tau$4 = pi$3 * 2;
+var max$1 = Math.max;
+var epsilon$5 = 1e-12;
+
+function range$1(i, j) {
+ return Array.from({length: j - i}, (_, k) => i + k);
+}
+
+function compareValue(compare) {
+ return function(a, b) {
+ return compare(
+ a.source.value + a.target.value,
+ b.source.value + b.target.value
+ );
+ };
+}
+
+function chord() {
+ return chord$1(false, false);
+}
+
+function chordTranspose() {
+ return chord$1(false, true);
+}
+
+function chordDirected() {
+ return chord$1(true, false);
+}
+
+function chord$1(directed, transpose) {
+ var padAngle = 0,
+ sortGroups = null,
+ sortSubgroups = null,
+ sortChords = null;
+
+ function chord(matrix) {
+ var n = matrix.length,
+ groupSums = new Array(n),
+ groupIndex = range$1(0, n),
+ chords = new Array(n * n),
+ groups = new Array(n),
+ k = 0, dx;
+
+ matrix = Float64Array.from({length: n * n}, transpose
+ ? (_, i) => matrix[i % n][i / n | 0]
+ : (_, i) => matrix[i / n | 0][i % n]);
+
+ // Compute the scaling factor from value to angle in [0, 2pi].
+ for (let i = 0; i < n; ++i) {
+ let x = 0;
+ for (let j = 0; j < n; ++j) x += matrix[i * n + j] + directed * matrix[j * n + i];
+ k += groupSums[i] = x;
+ }
+ k = max$1(0, tau$4 - padAngle * n) / k;
+ dx = k ? padAngle : tau$4 / n;
+
+ // Compute the angles for each group and constituent chord.
+ {
+ let x = 0;
+ if (sortGroups) groupIndex.sort((a, b) => sortGroups(groupSums[a], groupSums[b]));
+ for (const i of groupIndex) {
+ const x0 = x;
+ if (directed) {
+ const subgroupIndex = range$1(~n + 1, n).filter(j => j < 0 ? matrix[~j * n + i] : matrix[i * n + j]);
+ if (sortSubgroups) subgroupIndex.sort((a, b) => sortSubgroups(a < 0 ? -matrix[~a * n + i] : matrix[i * n + a], b < 0 ? -matrix[~b * n + i] : matrix[i * n + b]));
+ for (const j of subgroupIndex) {
+ if (j < 0) {
+ const chord = chords[~j * n + i] || (chords[~j * n + i] = {source: null, target: null});
+ chord.target = {index: i, startAngle: x, endAngle: x += matrix[~j * n + i] * k, value: matrix[~j * n + i]};
+ } else {
+ const chord = chords[i * n + j] || (chords[i * n + j] = {source: null, target: null});
+ chord.source = {index: i, startAngle: x, endAngle: x += matrix[i * n + j] * k, value: matrix[i * n + j]};
+ }
+ }
+ groups[i] = {index: i, startAngle: x0, endAngle: x, value: groupSums[i]};
+ } else {
+ const subgroupIndex = range$1(0, n).filter(j => matrix[i * n + j] || matrix[j * n + i]);
+ if (sortSubgroups) subgroupIndex.sort((a, b) => sortSubgroups(matrix[i * n + a], matrix[i * n + b]));
+ for (const j of subgroupIndex) {
+ let chord;
+ if (i < j) {
+ chord = chords[i * n + j] || (chords[i * n + j] = {source: null, target: null});
+ chord.source = {index: i, startAngle: x, endAngle: x += matrix[i * n + j] * k, value: matrix[i * n + j]};
+ } else {
+ chord = chords[j * n + i] || (chords[j * n + i] = {source: null, target: null});
+ chord.target = {index: i, startAngle: x, endAngle: x += matrix[i * n + j] * k, value: matrix[i * n + j]};
+ if (i === j) chord.source = chord.target;
+ }
+ if (chord.source && chord.target && chord.source.value < chord.target.value) {
+ const source = chord.source;
+ chord.source = chord.target;
+ chord.target = source;
+ }
+ }
+ groups[i] = {index: i, startAngle: x0, endAngle: x, value: groupSums[i]};
+ }
+ x += dx;
+ }
+ }
+
+ // Remove empty chords.
+ chords = Object.values(chords);
+ chords.groups = groups;
+ return sortChords ? chords.sort(sortChords) : chords;
+ }
+
+ chord.padAngle = function(_) {
+ return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
+ };
+
+ chord.sortGroups = function(_) {
+ return arguments.length ? (sortGroups = _, chord) : sortGroups;
+ };
+
+ chord.sortSubgroups = function(_) {
+ return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
+ };
+
+ chord.sortChords = function(_) {
+ return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
+ };
+
+ return chord;
+}
+
+const pi$2 = Math.PI,
+ tau$3 = 2 * pi$2,
+ epsilon$4 = 1e-6,
+ tauEpsilon = tau$3 - epsilon$4;
+
+function append$1(strings) {
+ this._ += strings[0];
+ for (let i = 1, n = strings.length; i < n; ++i) {
+ this._ += arguments[i] + strings[i];
+ }
+}
+
+function appendRound$1(digits) {
+ let d = Math.floor(digits);
+ if (!(d >= 0)) throw new Error(`invalid digits: ${digits}`);
+ if (d > 15) return append$1;
+ const k = 10 ** d;
+ return function(strings) {
+ this._ += strings[0];
+ for (let i = 1, n = strings.length; i < n; ++i) {
+ this._ += Math.round(arguments[i] * k) / k + strings[i];
+ }
+ };
+}
+
+let Path$1 = class Path {
+ constructor(digits) {
+ this._x0 = this._y0 = // start of current subpath
+ this._x1 = this._y1 = null; // end of current subpath
+ this._ = "";
+ this._append = digits == null ? append$1 : appendRound$1(digits);
+ }
+ moveTo(x, y) {
+ this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}`;
+ }
+ closePath() {
+ if (this._x1 !== null) {
+ this._x1 = this._x0, this._y1 = this._y0;
+ this._append`Z`;
+ }
+ }
+ lineTo(x, y) {
+ this._append`L${this._x1 = +x},${this._y1 = +y}`;
+ }
+ quadraticCurveTo(x1, y1, x, y) {
+ this._append`Q${+x1},${+y1},${this._x1 = +x},${this._y1 = +y}`;
+ }
+ bezierCurveTo(x1, y1, x2, y2, x, y) {
+ this._append`C${+x1},${+y1},${+x2},${+y2},${this._x1 = +x},${this._y1 = +y}`;
+ }
+ arcTo(x1, y1, x2, y2, r) {
+ x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
+
+ // Is the radius negative? Error.
+ if (r < 0) throw new Error(`negative radius: ${r}`);
+
+ let x0 = this._x1,
+ y0 = this._y1,
+ x21 = x2 - x1,
+ y21 = y2 - y1,
+ x01 = x0 - x1,
+ y01 = y0 - y1,
+ l01_2 = x01 * x01 + y01 * y01;
+
+ // Is this path empty? Move to (x1,y1).
+ if (this._x1 === null) {
+ this._append`M${this._x1 = x1},${this._y1 = y1}`;
+ }
+
+ // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
+ else if (!(l01_2 > epsilon$4));
+
+ // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
+ // Equivalently, is (x1,y1) coincident with (x2,y2)?
+ // Or, is the radius zero? Line to (x1,y1).
+ else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$4) || !r) {
+ this._append`L${this._x1 = x1},${this._y1 = y1}`;
+ }
+
+ // Otherwise, draw an arc!
+ else {
+ let x20 = x2 - x0,
+ y20 = y2 - y0,
+ l21_2 = x21 * x21 + y21 * y21,
+ l20_2 = x20 * x20 + y20 * y20,
+ l21 = Math.sqrt(l21_2),
+ l01 = Math.sqrt(l01_2),
+ l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
+ t01 = l / l01,
+ t21 = l / l21;
+
+ // If the start tangent is not coincident with (x0,y0), line to.
+ if (Math.abs(t01 - 1) > epsilon$4) {
+ this._append`L${x1 + t01 * x01},${y1 + t01 * y01}`;
+ }
+
+ this._append`A${r},${r},0,0,${+(y01 * x20 > x01 * y20)},${this._x1 = x1 + t21 * x21},${this._y1 = y1 + t21 * y21}`;
+ }
+ }
+ arc(x, y, r, a0, a1, ccw) {
+ x = +x, y = +y, r = +r, ccw = !!ccw;
+
+ // Is the radius negative? Error.
+ if (r < 0) throw new Error(`negative radius: ${r}`);
+
+ let dx = r * Math.cos(a0),
+ dy = r * Math.sin(a0),
+ x0 = x + dx,
+ y0 = y + dy,
+ cw = 1 ^ ccw,
+ da = ccw ? a0 - a1 : a1 - a0;
+
+ // Is this path empty? Move to (x0,y0).
+ if (this._x1 === null) {
+ this._append`M${x0},${y0}`;
+ }
+
+ // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
+ else if (Math.abs(this._x1 - x0) > epsilon$4 || Math.abs(this._y1 - y0) > epsilon$4) {
+ this._append`L${x0},${y0}`;
+ }
+
+ // Is this arc empty? We’re done.
+ if (!r) return;
+
+ // Does the angle go the wrong way? Flip the direction.
+ if (da < 0) da = da % tau$3 + tau$3;
+
+ // Is this a complete circle? Draw two arcs to complete the circle.
+ if (da > tauEpsilon) {
+ this._append`A${r},${r},0,1,${cw},${x - dx},${y - dy}A${r},${r},0,1,${cw},${this._x1 = x0},${this._y1 = y0}`;
+ }
+
+ // Is this arc non-empty? Draw an arc!
+ else if (da > epsilon$4) {
+ this._append`A${r},${r},0,${+(da >= pi$2)},${cw},${this._x1 = x + r * Math.cos(a1)},${this._y1 = y + r * Math.sin(a1)}`;
+ }
+ }
+ rect(x, y, w, h) {
+ this._append`M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}h${w = +w}v${+h}h${-w}Z`;
+ }
+ toString() {
+ return this._;
+ }
+};
+
+function path() {
+ return new Path$1;
+}
+
+// Allow instanceof d3.path
+path.prototype = Path$1.prototype;
+
+function pathRound(digits = 3) {
+ return new Path$1(+digits);
+}
+
+var slice$2 = Array.prototype.slice;
+
+function constant$6(x) {
+ return function() {
+ return x;
+ };
+}
+
+function defaultSource$1(d) {
+ return d.source;
+}
+
+function defaultTarget(d) {
+ return d.target;
+}
+
+function defaultRadius$1(d) {
+ return d.radius;
+}
+
+function defaultStartAngle(d) {
+ return d.startAngle;
+}
+
+function defaultEndAngle(d) {
+ return d.endAngle;
+}
+
+function defaultPadAngle() {
+ return 0;
+}
+
+function defaultArrowheadRadius() {
+ return 10;
+}
+
+function ribbon(headRadius) {
+ var source = defaultSource$1,
+ target = defaultTarget,
+ sourceRadius = defaultRadius$1,
+ targetRadius = defaultRadius$1,
+ startAngle = defaultStartAngle,
+ endAngle = defaultEndAngle,
+ padAngle = defaultPadAngle,
+ context = null;
+
+ function ribbon() {
+ var buffer,
+ s = source.apply(this, arguments),
+ t = target.apply(this, arguments),
+ ap = padAngle.apply(this, arguments) / 2,
+ argv = slice$2.call(arguments),
+ sr = +sourceRadius.apply(this, (argv[0] = s, argv)),
+ sa0 = startAngle.apply(this, argv) - halfPi$2,
+ sa1 = endAngle.apply(this, argv) - halfPi$2,
+ tr = +targetRadius.apply(this, (argv[0] = t, argv)),
+ ta0 = startAngle.apply(this, argv) - halfPi$2,
+ ta1 = endAngle.apply(this, argv) - halfPi$2;
+
+ if (!context) context = buffer = path();
+
+ if (ap > epsilon$5) {
+ if (abs$2(sa1 - sa0) > ap * 2 + epsilon$5) sa1 > sa0 ? (sa0 += ap, sa1 -= ap) : (sa0 -= ap, sa1 += ap);
+ else sa0 = sa1 = (sa0 + sa1) / 2;
+ if (abs$2(ta1 - ta0) > ap * 2 + epsilon$5) ta1 > ta0 ? (ta0 += ap, ta1 -= ap) : (ta0 -= ap, ta1 += ap);
+ else ta0 = ta1 = (ta0 + ta1) / 2;
+ }
+
+ context.moveTo(sr * cos$2(sa0), sr * sin$2(sa0));
+ context.arc(0, 0, sr, sa0, sa1);
+ if (sa0 !== ta0 || sa1 !== ta1) {
+ if (headRadius) {
+ var hr = +headRadius.apply(this, arguments), tr2 = tr - hr, ta2 = (ta0 + ta1) / 2;
+ context.quadraticCurveTo(0, 0, tr2 * cos$2(ta0), tr2 * sin$2(ta0));
+ context.lineTo(tr * cos$2(ta2), tr * sin$2(ta2));
+ context.lineTo(tr2 * cos$2(ta1), tr2 * sin$2(ta1));
+ } else {
+ context.quadraticCurveTo(0, 0, tr * cos$2(ta0), tr * sin$2(ta0));
+ context.arc(0, 0, tr, ta0, ta1);
+ }
+ }
+ context.quadraticCurveTo(0, 0, sr * cos$2(sa0), sr * sin$2(sa0));
+ context.closePath();
+
+ if (buffer) return context = null, buffer + "" || null;
+ }
+
+ if (headRadius) ribbon.headRadius = function(_) {
+ return arguments.length ? (headRadius = typeof _ === "function" ? _ : constant$6(+_), ribbon) : headRadius;
+ };
+
+ ribbon.radius = function(_) {
+ return arguments.length ? (sourceRadius = targetRadius = typeof _ === "function" ? _ : constant$6(+_), ribbon) : sourceRadius;
+ };
+
+ ribbon.sourceRadius = function(_) {
+ return arguments.length ? (sourceRadius = typeof _ === "function" ? _ : constant$6(+_), ribbon) : sourceRadius;
+ };
+
+ ribbon.targetRadius = function(_) {
+ return arguments.length ? (targetRadius = typeof _ === "function" ? _ : constant$6(+_), ribbon) : targetRadius;
+ };
+
+ ribbon.startAngle = function(_) {
+ return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$6(+_), ribbon) : startAngle;
+ };
+
+ ribbon.endAngle = function(_) {
+ return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$6(+_), ribbon) : endAngle;
+ };
+
+ ribbon.padAngle = function(_) {
+ return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$6(+_), ribbon) : padAngle;
+ };
+
+ ribbon.source = function(_) {
+ return arguments.length ? (source = _, ribbon) : source;
+ };
+
+ ribbon.target = function(_) {
+ return arguments.length ? (target = _, ribbon) : target;
+ };
+
+ ribbon.context = function(_) {
+ return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;
+ };
+
+ return ribbon;
+}
+
+function ribbon$1() {
+ return ribbon();
+}
+
+function ribbonArrow() {
+ return ribbon(defaultArrowheadRadius);
+}
+
+var array$2 = Array.prototype;
+
+var slice$1 = array$2.slice;
+
+function ascending$1(a, b) {
+ return a - b;
+}
+
+function area$3(ring) {
+ var i = 0, n = ring.length, area = ring[n - 1][1] * ring[0][0] - ring[n - 1][0] * ring[0][1];
+ while (++i < n) area += ring[i - 1][1] * ring[i][0] - ring[i - 1][0] * ring[i][1];
+ return area;
+}
+
+var constant$5 = x => () => x;
+
+function contains$2(ring, hole) {
+ var i = -1, n = hole.length, c;
+ while (++i < n) if (c = ringContains(ring, hole[i])) return c;
+ return 0;
+}
+
+function ringContains(ring, point) {
+ var x = point[0], y = point[1], contains = -1;
+ for (var i = 0, n = ring.length, j = n - 1; i < n; j = i++) {
+ var pi = ring[i], xi = pi[0], yi = pi[1], pj = ring[j], xj = pj[0], yj = pj[1];
+ if (segmentContains(pi, pj, point)) return 0;
+ if (((yi > y) !== (yj > y)) && ((x < (xj - xi) * (y - yi) / (yj - yi) + xi))) contains = -contains;
+ }
+ return contains;
+}
+
+function segmentContains(a, b, c) {
+ var i; return collinear$1(a, b, c) && within(a[i = +(a[0] === b[0])], c[i], b[i]);
+}
+
+function collinear$1(a, b, c) {
+ return (b[0] - a[0]) * (c[1] - a[1]) === (c[0] - a[0]) * (b[1] - a[1]);
+}
+
+function within(p, q, r) {
+ return p <= q && q <= r || r <= q && q <= p;
+}
+
+function noop$2() {}
+
+var cases = [
+ [],
+ [[[1.0, 1.5], [0.5, 1.0]]],
+ [[[1.5, 1.0], [1.0, 1.5]]],
+ [[[1.5, 1.0], [0.5, 1.0]]],
+ [[[1.0, 0.5], [1.5, 1.0]]],
+ [[[1.0, 1.5], [0.5, 1.0]], [[1.0, 0.5], [1.5, 1.0]]],
+ [[[1.0, 0.5], [1.0, 1.5]]],
+ [[[1.0, 0.5], [0.5, 1.0]]],
+ [[[0.5, 1.0], [1.0, 0.5]]],
+ [[[1.0, 1.5], [1.0, 0.5]]],
+ [[[0.5, 1.0], [1.0, 0.5]], [[1.5, 1.0], [1.0, 1.5]]],
+ [[[1.5, 1.0], [1.0, 0.5]]],
+ [[[0.5, 1.0], [1.5, 1.0]]],
+ [[[1.0, 1.5], [1.5, 1.0]]],
+ [[[0.5, 1.0], [1.0, 1.5]]],
+ []
+];
+
+function Contours() {
+ var dx = 1,
+ dy = 1,
+ threshold = thresholdSturges,
+ smooth = smoothLinear;
+
+ function contours(values) {
+ var tz = threshold(values);
+
+ // Convert number of thresholds into uniform thresholds.
+ if (!Array.isArray(tz)) {
+ const e = extent$1(values, finite);
+ tz = ticks(...nice$1(e[0], e[1], tz), tz);
+ while (tz[tz.length - 1] >= e[1]) tz.pop();
+ while (tz[1] < e[0]) tz.shift();
+ } else {
+ tz = tz.slice().sort(ascending$1);
+ }
+
+ return tz.map(value => contour(values, value));
+ }
+
+ // Accumulate, smooth contour rings, assign holes to exterior rings.
+ // Based on https://github.com/mbostock/shapefile/blob/v0.6.2/shp/polygon.js
+ function contour(values, value) {
+ const v = value == null ? NaN : +value;
+ if (isNaN(v)) throw new Error(`invalid value: ${value}`);
+
+ var polygons = [],
+ holes = [];
+
+ isorings(values, v, function(ring) {
+ smooth(ring, values, v);
+ if (area$3(ring) > 0) polygons.push([ring]);
+ else holes.push(ring);
+ });
+
+ holes.forEach(function(hole) {
+ for (var i = 0, n = polygons.length, polygon; i < n; ++i) {
+ if (contains$2((polygon = polygons[i])[0], hole) !== -1) {
+ polygon.push(hole);
+ return;
+ }
+ }
+ });
+
+ return {
+ type: "MultiPolygon",
+ value: value,
+ coordinates: polygons
+ };
+ }
+
+ // Marching squares with isolines stitched into rings.
+ // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js
+ function isorings(values, value, callback) {
+ var fragmentByStart = new Array,
+ fragmentByEnd = new Array,
+ x, y, t0, t1, t2, t3;
+
+ // Special case for the first row (y = -1, t2 = t3 = 0).
+ x = y = -1;
+ t1 = above(values[0], value);
+ cases[t1 << 1].forEach(stitch);
+ while (++x < dx - 1) {
+ t0 = t1, t1 = above(values[x + 1], value);
+ cases[t0 | t1 << 1].forEach(stitch);
+ }
+ cases[t1 << 0].forEach(stitch);
+
+ // General case for the intermediate rows.
+ while (++y < dy - 1) {
+ x = -1;
+ t1 = above(values[y * dx + dx], value);
+ t2 = above(values[y * dx], value);
+ cases[t1 << 1 | t2 << 2].forEach(stitch);
+ while (++x < dx - 1) {
+ t0 = t1, t1 = above(values[y * dx + dx + x + 1], value);
+ t3 = t2, t2 = above(values[y * dx + x + 1], value);
+ cases[t0 | t1 << 1 | t2 << 2 | t3 << 3].forEach(stitch);
+ }
+ cases[t1 | t2 << 3].forEach(stitch);
+ }
+
+ // Special case for the last row (y = dy - 1, t0 = t1 = 0).
+ x = -1;
+ t2 = values[y * dx] >= value;
+ cases[t2 << 2].forEach(stitch);
+ while (++x < dx - 1) {
+ t3 = t2, t2 = above(values[y * dx + x + 1], value);
+ cases[t2 << 2 | t3 << 3].forEach(stitch);
+ }
+ cases[t2 << 3].forEach(stitch);
+
+ function stitch(line) {
+ var start = [line[0][0] + x, line[0][1] + y],
+ end = [line[1][0] + x, line[1][1] + y],
+ startIndex = index(start),
+ endIndex = index(end),
+ f, g;
+ if (f = fragmentByEnd[startIndex]) {
+ if (g = fragmentByStart[endIndex]) {
+ delete fragmentByEnd[f.end];
+ delete fragmentByStart[g.start];
+ if (f === g) {
+ f.ring.push(end);
+ callback(f.ring);
+ } else {
+ fragmentByStart[f.start] = fragmentByEnd[g.end] = {start: f.start, end: g.end, ring: f.ring.concat(g.ring)};
+ }
+ } else {
+ delete fragmentByEnd[f.end];
+ f.ring.push(end);
+ fragmentByEnd[f.end = endIndex] = f;
+ }
+ } else if (f = fragmentByStart[endIndex]) {
+ if (g = fragmentByEnd[startIndex]) {
+ delete fragmentByStart[f.start];
+ delete fragmentByEnd[g.end];
+ if (f === g) {
+ f.ring.push(end);
+ callback(f.ring);
+ } else {
+ fragmentByStart[g.start] = fragmentByEnd[f.end] = {start: g.start, end: f.end, ring: g.ring.concat(f.ring)};
+ }
+ } else {
+ delete fragmentByStart[f.start];
+ f.ring.unshift(start);
+ fragmentByStart[f.start = startIndex] = f;
+ }
+ } else {
+ fragmentByStart[startIndex] = fragmentByEnd[endIndex] = {start: startIndex, end: endIndex, ring: [start, end]};
+ }
+ }
+ }
+
+ function index(point) {
+ return point[0] * 2 + point[1] * (dx + 1) * 4;
+ }
+
+ function smoothLinear(ring, values, value) {
+ ring.forEach(function(point) {
+ var x = point[0],
+ y = point[1],
+ xt = x | 0,
+ yt = y | 0,
+ v1 = valid(values[yt * dx + xt]);
+ if (x > 0 && x < dx && xt === x) {
+ point[0] = smooth1(x, valid(values[yt * dx + xt - 1]), v1, value);
+ }
+ if (y > 0 && y < dy && yt === y) {
+ point[1] = smooth1(y, valid(values[(yt - 1) * dx + xt]), v1, value);
+ }
+ });
+ }
+
+ contours.contour = contour;
+
+ contours.size = function(_) {
+ if (!arguments.length) return [dx, dy];
+ var _0 = Math.floor(_[0]), _1 = Math.floor(_[1]);
+ if (!(_0 >= 0 && _1 >= 0)) throw new Error("invalid size");
+ return dx = _0, dy = _1, contours;
+ };
+
+ contours.thresholds = function(_) {
+ return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$5(slice$1.call(_)) : constant$5(_), contours) : threshold;
+ };
+
+ contours.smooth = function(_) {
+ return arguments.length ? (smooth = _ ? smoothLinear : noop$2, contours) : smooth === smoothLinear;
+ };
+
+ return contours;
+}
+
+// When computing the extent, ignore infinite values (as well as invalid ones).
+function finite(x) {
+ return isFinite(x) ? x : NaN;
+}
+
+// Is the (possibly invalid) x greater than or equal to the (known valid) value?
+// Treat any invalid value as below negative infinity.
+function above(x, value) {
+ return x == null ? false : +x >= value;
+}
+
+// During smoothing, treat any invalid value as negative infinity.
+function valid(v) {
+ return v == null || isNaN(v = +v) ? -Infinity : v;
+}
+
+function smooth1(x, v0, v1, value) {
+ const a = value - v0;
+ const b = v1 - v0;
+ const d = isFinite(a) || isFinite(b) ? a / b : Math.sign(a) / Math.sign(b);
+ return isNaN(d) ? x : x + d - 0.5;
+}
+
+function defaultX$1(d) {
+ return d[0];
+}
+
+function defaultY$1(d) {
+ return d[1];
+}
+
+function defaultWeight() {
+ return 1;
+}
+
+function density() {
+ var x = defaultX$1,
+ y = defaultY$1,
+ weight = defaultWeight,
+ dx = 960,
+ dy = 500,
+ r = 20, // blur radius
+ k = 2, // log2(grid cell size)
+ o = r * 3, // grid offset, to pad for blur
+ n = (dx + o * 2) >> k, // grid width
+ m = (dy + o * 2) >> k, // grid height
+ threshold = constant$5(20);
+
+ function grid(data) {
+ var values = new Float32Array(n * m),
+ pow2k = Math.pow(2, -k),
+ i = -1;
+
+ for (const d of data) {
+ var xi = (x(d, ++i, data) + o) * pow2k,
+ yi = (y(d, i, data) + o) * pow2k,
+ wi = +weight(d, i, data);
+ if (wi && xi >= 0 && xi < n && yi >= 0 && yi < m) {
+ var x0 = Math.floor(xi),
+ y0 = Math.floor(yi),
+ xt = xi - x0 - 0.5,
+ yt = yi - y0 - 0.5;
+ values[x0 + y0 * n] += (1 - xt) * (1 - yt) * wi;
+ values[x0 + 1 + y0 * n] += xt * (1 - yt) * wi;
+ values[x0 + 1 + (y0 + 1) * n] += xt * yt * wi;
+ values[x0 + (y0 + 1) * n] += (1 - xt) * yt * wi;
+ }
+ }
+
+ blur2({data: values, width: n, height: m}, r * pow2k);
+ return values;
+ }
+
+ function density(data) {
+ var values = grid(data),
+ tz = threshold(values),
+ pow4k = Math.pow(2, 2 * k);
+
+ // Convert number of thresholds into uniform thresholds.
+ if (!Array.isArray(tz)) {
+ tz = ticks(Number.MIN_VALUE, max$3(values) / pow4k, tz);
+ }
+
+ return Contours()
+ .size([n, m])
+ .thresholds(tz.map(d => d * pow4k))
+ (values)
+ .map((c, i) => (c.value = +tz[i], transform(c)));
+ }
+
+ density.contours = function(data) {
+ var values = grid(data),
+ contours = Contours().size([n, m]),
+ pow4k = Math.pow(2, 2 * k),
+ contour = value => {
+ value = +value;
+ var c = transform(contours.contour(values, value * pow4k));
+ c.value = value; // preserve exact threshold value
+ return c;
+ };
+ Object.defineProperty(contour, "max", {get: () => max$3(values) / pow4k});
+ return contour;
+ };
+
+ function transform(geometry) {
+ geometry.coordinates.forEach(transformPolygon);
+ return geometry;
+ }
+
+ function transformPolygon(coordinates) {
+ coordinates.forEach(transformRing);
+ }
+
+ function transformRing(coordinates) {
+ coordinates.forEach(transformPoint);
+ }
+
+ // TODO Optimize.
+ function transformPoint(coordinates) {
+ coordinates[0] = coordinates[0] * Math.pow(2, k) - o;
+ coordinates[1] = coordinates[1] * Math.pow(2, k) - o;
+ }
+
+ function resize() {
+ o = r * 3;
+ n = (dx + o * 2) >> k;
+ m = (dy + o * 2) >> k;
+ return density;
+ }
+
+ density.x = function(_) {
+ return arguments.length ? (x = typeof _ === "function" ? _ : constant$5(+_), density) : x;
+ };
+
+ density.y = function(_) {
+ return arguments.length ? (y = typeof _ === "function" ? _ : constant$5(+_), density) : y;
+ };
+
+ density.weight = function(_) {
+ return arguments.length ? (weight = typeof _ === "function" ? _ : constant$5(+_), density) : weight;
+ };
+
+ density.size = function(_) {
+ if (!arguments.length) return [dx, dy];
+ var _0 = +_[0], _1 = +_[1];
+ if (!(_0 >= 0 && _1 >= 0)) throw new Error("invalid size");
+ return dx = _0, dy = _1, resize();
+ };
+
+ density.cellSize = function(_) {
+ if (!arguments.length) return 1 << k;
+ if (!((_ = +_) >= 1)) throw new Error("invalid cell size");
+ return k = Math.floor(Math.log(_) / Math.LN2), resize();
+ };
+
+ density.thresholds = function(_) {
+ return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$5(slice$1.call(_)) : constant$5(_), density) : threshold;
+ };
+
+ density.bandwidth = function(_) {
+ if (!arguments.length) return Math.sqrt(r * (r + 1));
+ if (!((_ = +_) >= 0)) throw new Error("invalid bandwidth");
+ return r = (Math.sqrt(4 * _ * _ + 1) - 1) / 2, resize();
+ };
+
+ return density;
+}
+
+const epsilon$3 = 1.1102230246251565e-16;
+const splitter = 134217729;
+const resulterrbound = (3 + 8 * epsilon$3) * epsilon$3;
+
+// fast_expansion_sum_zeroelim routine from oritinal code
+function sum$1(elen, e, flen, f, h) {
+ let Q, Qnew, hh, bvirt;
+ let enow = e[0];
+ let fnow = f[0];
+ let eindex = 0;
+ let findex = 0;
+ if ((fnow > enow) === (fnow > -enow)) {
+ Q = enow;
+ enow = e[++eindex];
+ } else {
+ Q = fnow;
+ fnow = f[++findex];
+ }
+ let hindex = 0;
+ if (eindex < elen && findex < flen) {
+ if ((fnow > enow) === (fnow > -enow)) {
+ Qnew = enow + Q;
+ hh = Q - (Qnew - enow);
+ enow = e[++eindex];
+ } else {
+ Qnew = fnow + Q;
+ hh = Q - (Qnew - fnow);
+ fnow = f[++findex];
+ }
+ Q = Qnew;
+ if (hh !== 0) {
+ h[hindex++] = hh;
+ }
+ while (eindex < elen && findex < flen) {
+ if ((fnow > enow) === (fnow > -enow)) {
+ Qnew = Q + enow;
+ bvirt = Qnew - Q;
+ hh = Q - (Qnew - bvirt) + (enow - bvirt);
+ enow = e[++eindex];
+ } else {
+ Qnew = Q + fnow;
+ bvirt = Qnew - Q;
+ hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+ fnow = f[++findex];
+ }
+ Q = Qnew;
+ if (hh !== 0) {
+ h[hindex++] = hh;
+ }
+ }
+ }
+ while (eindex < elen) {
+ Qnew = Q + enow;
+ bvirt = Qnew - Q;
+ hh = Q - (Qnew - bvirt) + (enow - bvirt);
+ enow = e[++eindex];
+ Q = Qnew;
+ if (hh !== 0) {
+ h[hindex++] = hh;
+ }
+ }
+ while (findex < flen) {
+ Qnew = Q + fnow;
+ bvirt = Qnew - Q;
+ hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+ fnow = f[++findex];
+ Q = Qnew;
+ if (hh !== 0) {
+ h[hindex++] = hh;
+ }
+ }
+ if (Q !== 0 || hindex === 0) {
+ h[hindex++] = Q;
+ }
+ return hindex;
+}
+
+function estimate(elen, e) {
+ let Q = e[0];
+ for (let i = 1; i < elen; i++) Q += e[i];
+ return Q;
+}
+
+function vec(n) {
+ return new Float64Array(n);
+}
+
+const ccwerrboundA = (3 + 16 * epsilon$3) * epsilon$3;
+const ccwerrboundB = (2 + 12 * epsilon$3) * epsilon$3;
+const ccwerrboundC = (9 + 64 * epsilon$3) * epsilon$3 * epsilon$3;
+
+const B = vec(4);
+const C1 = vec(8);
+const C2 = vec(12);
+const D = vec(16);
+const u = vec(4);
+
+function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
+ let acxtail, acytail, bcxtail, bcytail;
+ let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
+
+ const acx = ax - cx;
+ const bcx = bx - cx;
+ const acy = ay - cy;
+ const bcy = by - cy;
+
+ s1 = acx * bcy;
+ c = splitter * acx;
+ ahi = c - (c - acx);
+ alo = acx - ahi;
+ c = splitter * bcy;
+ bhi = c - (c - bcy);
+ blo = bcy - bhi;
+ s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+ t1 = acy * bcx;
+ c = splitter * acy;
+ ahi = c - (c - acy);
+ alo = acy - ahi;
+ c = splitter * bcx;
+ bhi = c - (c - bcx);
+ blo = bcx - bhi;
+ t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+ _i = s0 - t0;
+ bvirt = s0 - _i;
+ B[0] = s0 - (_i + bvirt) + (bvirt - t0);
+ _j = s1 + _i;
+ bvirt = _j - s1;
+ _0 = s1 - (_j - bvirt) + (_i - bvirt);
+ _i = _0 - t1;
+ bvirt = _0 - _i;
+ B[1] = _0 - (_i + bvirt) + (bvirt - t1);
+ u3 = _j + _i;
+ bvirt = u3 - _j;
+ B[2] = _j - (u3 - bvirt) + (_i - bvirt);
+ B[3] = u3;
+
+ let det = estimate(4, B);
+ let errbound = ccwerrboundB * detsum;
+ if (det >= errbound || -det >= errbound) {
+ return det;
+ }
+
+ bvirt = ax - acx;
+ acxtail = ax - (acx + bvirt) + (bvirt - cx);
+ bvirt = bx - bcx;
+ bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
+ bvirt = ay - acy;
+ acytail = ay - (acy + bvirt) + (bvirt - cy);
+ bvirt = by - bcy;
+ bcytail = by - (bcy + bvirt) + (bvirt - cy);
+
+ if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
+ return det;
+ }
+
+ errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
+ det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
+ if (det >= errbound || -det >= errbound) return det;
+
+ s1 = acxtail * bcy;
+ c = splitter * acxtail;
+ ahi = c - (c - acxtail);
+ alo = acxtail - ahi;
+ c = splitter * bcy;
+ bhi = c - (c - bcy);
+ blo = bcy - bhi;
+ s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+ t1 = acytail * bcx;
+ c = splitter * acytail;
+ ahi = c - (c - acytail);
+ alo = acytail - ahi;
+ c = splitter * bcx;
+ bhi = c - (c - bcx);
+ blo = bcx - bhi;
+ t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+ _i = s0 - t0;
+ bvirt = s0 - _i;
+ u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+ _j = s1 + _i;
+ bvirt = _j - s1;
+ _0 = s1 - (_j - bvirt) + (_i - bvirt);
+ _i = _0 - t1;
+ bvirt = _0 - _i;
+ u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+ u3 = _j + _i;
+ bvirt = u3 - _j;
+ u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+ u[3] = u3;
+ const C1len = sum$1(4, B, 4, u, C1);
+
+ s1 = acx * bcytail;
+ c = splitter * acx;
+ ahi = c - (c - acx);
+ alo = acx - ahi;
+ c = splitter * bcytail;
+ bhi = c - (c - bcytail);
+ blo = bcytail - bhi;
+ s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+ t1 = acy * bcxtail;
+ c = splitter * acy;
+ ahi = c - (c - acy);
+ alo = acy - ahi;
+ c = splitter * bcxtail;
+ bhi = c - (c - bcxtail);
+ blo = bcxtail - bhi;
+ t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+ _i = s0 - t0;
+ bvirt = s0 - _i;
+ u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+ _j = s1 + _i;
+ bvirt = _j - s1;
+ _0 = s1 - (_j - bvirt) + (_i - bvirt);
+ _i = _0 - t1;
+ bvirt = _0 - _i;
+ u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+ u3 = _j + _i;
+ bvirt = u3 - _j;
+ u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+ u[3] = u3;
+ const C2len = sum$1(C1len, C1, 4, u, C2);
+
+ s1 = acxtail * bcytail;
+ c = splitter * acxtail;
+ ahi = c - (c - acxtail);
+ alo = acxtail - ahi;
+ c = splitter * bcytail;
+ bhi = c - (c - bcytail);
+ blo = bcytail - bhi;
+ s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+ t1 = acytail * bcxtail;
+ c = splitter * acytail;
+ ahi = c - (c - acytail);
+ alo = acytail - ahi;
+ c = splitter * bcxtail;
+ bhi = c - (c - bcxtail);
+ blo = bcxtail - bhi;
+ t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+ _i = s0 - t0;
+ bvirt = s0 - _i;
+ u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+ _j = s1 + _i;
+ bvirt = _j - s1;
+ _0 = s1 - (_j - bvirt) + (_i - bvirt);
+ _i = _0 - t1;
+ bvirt = _0 - _i;
+ u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+ u3 = _j + _i;
+ bvirt = u3 - _j;
+ u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+ u[3] = u3;
+ const Dlen = sum$1(C2len, C2, 4, u, D);
+
+ return D[Dlen - 1];
+}
+
+function orient2d(ax, ay, bx, by, cx, cy) {
+ const detleft = (ay - cy) * (bx - cx);
+ const detright = (ax - cx) * (by - cy);
+ const det = detleft - detright;
+
+ const detsum = Math.abs(detleft + detright);
+ if (Math.abs(det) >= ccwerrboundA * detsum) return det;
+
+ return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
+}
+
+const EPSILON = Math.pow(2, -52);
+const EDGE_STACK = new Uint32Array(512);
+
+class Delaunator {
+
+ static from(points, getX = defaultGetX, getY = defaultGetY) {
+ const n = points.length;
+ const coords = new Float64Array(n * 2);
+
+ for (let i = 0; i < n; i++) {
+ const p = points[i];
+ coords[2 * i] = getX(p);
+ coords[2 * i + 1] = getY(p);
+ }
+
+ return new Delaunator(coords);
+ }
+
+ constructor(coords) {
+ const n = coords.length >> 1;
+ if (n > 0 && typeof coords[0] !== 'number') throw new Error('Expected coords to contain numbers.');
+
+ this.coords = coords;
+
+ // arrays that will store the triangulation graph
+ const maxTriangles = Math.max(2 * n - 5, 0);
+ this._triangles = new Uint32Array(maxTriangles * 3);
+ this._halfedges = new Int32Array(maxTriangles * 3);
+
+ // temporary arrays for tracking the edges of the advancing convex hull
+ this._hashSize = Math.ceil(Math.sqrt(n));
+ this._hullPrev = new Uint32Array(n); // edge to prev edge
+ this._hullNext = new Uint32Array(n); // edge to next edge
+ this._hullTri = new Uint32Array(n); // edge to adjacent triangle
+ this._hullHash = new Int32Array(this._hashSize); // angular edge hash
+
+ // temporary arrays for sorting points
+ this._ids = new Uint32Array(n);
+ this._dists = new Float64Array(n);
+
+ this.update();
+ }
+
+ update() {
+ const {coords, _hullPrev: hullPrev, _hullNext: hullNext, _hullTri: hullTri, _hullHash: hullHash} = this;
+ const n = coords.length >> 1;
+
+ // populate an array of point indices; calculate input data bbox
+ let minX = Infinity;
+ let minY = Infinity;
+ let maxX = -Infinity;
+ let maxY = -Infinity;
+
+ for (let i = 0; i < n; i++) {
+ const x = coords[2 * i];
+ const y = coords[2 * i + 1];
+ if (x < minX) minX = x;
+ if (y < minY) minY = y;
+ if (x > maxX) maxX = x;
+ if (y > maxY) maxY = y;
+ this._ids[i] = i;
+ }
+ const cx = (minX + maxX) / 2;
+ const cy = (minY + maxY) / 2;
+
+ let i0, i1, i2;
+
+ // pick a seed point close to the center
+ for (let i = 0, minDist = Infinity; i < n; i++) {
+ const d = dist(cx, cy, coords[2 * i], coords[2 * i + 1]);
+ if (d < minDist) {
+ i0 = i;
+ minDist = d;
+ }
+ }
+ const i0x = coords[2 * i0];
+ const i0y = coords[2 * i0 + 1];
+
+ // find the point closest to the seed
+ for (let i = 0, minDist = Infinity; i < n; i++) {
+ if (i === i0) continue;
+ const d = dist(i0x, i0y, coords[2 * i], coords[2 * i + 1]);
+ if (d < minDist && d > 0) {
+ i1 = i;
+ minDist = d;
+ }
+ }
+ let i1x = coords[2 * i1];
+ let i1y = coords[2 * i1 + 1];
+
+ let minRadius = Infinity;
+
+ // find the third point which forms the smallest circumcircle with the first two
+ for (let i = 0; i < n; i++) {
+ if (i === i0 || i === i1) continue;
+ const r = circumradius(i0x, i0y, i1x, i1y, coords[2 * i], coords[2 * i + 1]);
+ if (r < minRadius) {
+ i2 = i;
+ minRadius = r;
+ }
+ }
+ let i2x = coords[2 * i2];
+ let i2y = coords[2 * i2 + 1];
+
+ if (minRadius === Infinity) {
+ // order collinear points by dx (or dy if all x are identical)
+ // and return the list as a hull
+ for (let i = 0; i < n; i++) {
+ this._dists[i] = (coords[2 * i] - coords[0]) || (coords[2 * i + 1] - coords[1]);
+ }
+ quicksort(this._ids, this._dists, 0, n - 1);
+ const hull = new Uint32Array(n);
+ let j = 0;
+ for (let i = 0, d0 = -Infinity; i < n; i++) {
+ const id = this._ids[i];
+ const d = this._dists[id];
+ if (d > d0) {
+ hull[j++] = id;
+ d0 = d;
+ }
+ }
+ this.hull = hull.subarray(0, j);
+ this.triangles = new Uint32Array(0);
+ this.halfedges = new Uint32Array(0);
+ return;
+ }
+
+ // swap the order of the seed points for counter-clockwise orientation
+ if (orient2d(i0x, i0y, i1x, i1y, i2x, i2y) < 0) {
+ const i = i1;
+ const x = i1x;
+ const y = i1y;
+ i1 = i2;
+ i1x = i2x;
+ i1y = i2y;
+ i2 = i;
+ i2x = x;
+ i2y = y;
+ }
+
+ const center = circumcenter(i0x, i0y, i1x, i1y, i2x, i2y);
+ this._cx = center.x;
+ this._cy = center.y;
+
+ for (let i = 0; i < n; i++) {
+ this._dists[i] = dist(coords[2 * i], coords[2 * i + 1], center.x, center.y);
+ }
+
+ // sort the points by distance from the seed triangle circumcenter
+ quicksort(this._ids, this._dists, 0, n - 1);
+
+ // set up the seed triangle as the starting hull
+ this._hullStart = i0;
+ let hullSize = 3;
+
+ hullNext[i0] = hullPrev[i2] = i1;
+ hullNext[i1] = hullPrev[i0] = i2;
+ hullNext[i2] = hullPrev[i1] = i0;
+
+ hullTri[i0] = 0;
+ hullTri[i1] = 1;
+ hullTri[i2] = 2;
+
+ hullHash.fill(-1);
+ hullHash[this._hashKey(i0x, i0y)] = i0;
+ hullHash[this._hashKey(i1x, i1y)] = i1;
+ hullHash[this._hashKey(i2x, i2y)] = i2;
+
+ this.trianglesLen = 0;
+ this._addTriangle(i0, i1, i2, -1, -1, -1);
+
+ for (let k = 0, xp, yp; k < this._ids.length; k++) {
+ const i = this._ids[k];
+ const x = coords[2 * i];
+ const y = coords[2 * i + 1];
+
+ // skip near-duplicate points
+ if (k > 0 && Math.abs(x - xp) <= EPSILON && Math.abs(y - yp) <= EPSILON) continue;
+ xp = x;
+ yp = y;
+
+ // skip seed triangle points
+ if (i === i0 || i === i1 || i === i2) continue;
+
+ // find a visible edge on the convex hull using edge hash
+ let start = 0;
+ for (let j = 0, key = this._hashKey(x, y); j < this._hashSize; j++) {
+ start = hullHash[(key + j) % this._hashSize];
+ if (start !== -1 && start !== hullNext[start]) break;
+ }
+
+ start = hullPrev[start];
+ let e = start, q;
+ while (q = hullNext[e], orient2d(x, y, coords[2 * e], coords[2 * e + 1], coords[2 * q], coords[2 * q + 1]) >= 0) {
+ e = q;
+ if (e === start) {
+ e = -1;
+ break;
+ }
+ }
+ if (e === -1) continue; // likely a near-duplicate point; skip it
+
+ // add the first triangle from the point
+ let t = this._addTriangle(e, i, hullNext[e], -1, -1, hullTri[e]);
+
+ // recursively flip triangles from the point until they satisfy the Delaunay condition
+ hullTri[i] = this._legalize(t + 2);
+ hullTri[e] = t; // keep track of boundary triangles on the hull
+ hullSize++;
+
+ // walk forward through the hull, adding more triangles and flipping recursively
+ let n = hullNext[e];
+ while (q = hullNext[n], orient2d(x, y, coords[2 * n], coords[2 * n + 1], coords[2 * q], coords[2 * q + 1]) < 0) {
+ t = this._addTriangle(n, i, q, hullTri[i], -1, hullTri[n]);
+ hullTri[i] = this._legalize(t + 2);
+ hullNext[n] = n; // mark as removed
+ hullSize--;
+ n = q;
+ }
+
+ // walk backward from the other side, adding more triangles and flipping
+ if (e === start) {
+ while (q = hullPrev[e], orient2d(x, y, coords[2 * q], coords[2 * q + 1], coords[2 * e], coords[2 * e + 1]) < 0) {
+ t = this._addTriangle(q, i, e, -1, hullTri[e], hullTri[q]);
+ this._legalize(t + 2);
+ hullTri[q] = t;
+ hullNext[e] = e; // mark as removed
+ hullSize--;
+ e = q;
+ }
+ }
+
+ // update the hull indices
+ this._hullStart = hullPrev[i] = e;
+ hullNext[e] = hullPrev[n] = i;
+ hullNext[i] = n;
+
+ // save the two new edges in the hash table
+ hullHash[this._hashKey(x, y)] = i;
+ hullHash[this._hashKey(coords[2 * e], coords[2 * e + 1])] = e;
+ }
+
+ this.hull = new Uint32Array(hullSize);
+ for (let i = 0, e = this._hullStart; i < hullSize; i++) {
+ this.hull[i] = e;
+ e = hullNext[e];
+ }
+
+ // trim typed triangle mesh arrays
+ this.triangles = this._triangles.subarray(0, this.trianglesLen);
+ this.halfedges = this._halfedges.subarray(0, this.trianglesLen);
+ }
+
+ _hashKey(x, y) {
+ return Math.floor(pseudoAngle(x - this._cx, y - this._cy) * this._hashSize) % this._hashSize;
+ }
+
+ _legalize(a) {
+ const {_triangles: triangles, _halfedges: halfedges, coords} = this;
+
+ let i = 0;
+ let ar = 0;
+
+ // recursion eliminated with a fixed-size stack
+ while (true) {
+ const b = halfedges[a];
+
+ /* if the pair of triangles doesn't satisfy the Delaunay condition
+ * (p1 is inside the circumcircle of [p0, pl, pr]), flip them,
+ * then do the same check/flip recursively for the new pair of triangles
+ *
+ * pl pl
+ * /||\ / \
+ * al/ || \bl al/ \a
+ * / || \ / \
+ * / a||b \ flip /___ar___\
+ * p0\ || /p1 => p0\---bl---/p1
+ * \ || / \ /
+ * ar\ || /br b\ /br
+ * \||/ \ /
+ * pr pr
+ */
+ const a0 = a - a % 3;
+ ar = a0 + (a + 2) % 3;
+
+ if (b === -1) { // convex hull edge
+ if (i === 0) break;
+ a = EDGE_STACK[--i];
+ continue;
+ }
+
+ const b0 = b - b % 3;
+ const al = a0 + (a + 1) % 3;
+ const bl = b0 + (b + 2) % 3;
+
+ const p0 = triangles[ar];
+ const pr = triangles[a];
+ const pl = triangles[al];
+ const p1 = triangles[bl];
+
+ const illegal = inCircle(
+ coords[2 * p0], coords[2 * p0 + 1],
+ coords[2 * pr], coords[2 * pr + 1],
+ coords[2 * pl], coords[2 * pl + 1],
+ coords[2 * p1], coords[2 * p1 + 1]);
+
+ if (illegal) {
+ triangles[a] = p1;
+ triangles[b] = p0;
+
+ const hbl = halfedges[bl];
+
+ // edge swapped on the other side of the hull (rare); fix the halfedge reference
+ if (hbl === -1) {
+ let e = this._hullStart;
+ do {
+ if (this._hullTri[e] === bl) {
+ this._hullTri[e] = a;
+ break;
+ }
+ e = this._hullPrev[e];
+ } while (e !== this._hullStart);
+ }
+ this._link(a, hbl);
+ this._link(b, halfedges[ar]);
+ this._link(ar, bl);
+
+ const br = b0 + (b + 1) % 3;
+
+ // don't worry about hitting the cap: it can only happen on extremely degenerate input
+ if (i < EDGE_STACK.length) {
+ EDGE_STACK[i++] = br;
+ }
+ } else {
+ if (i === 0) break;
+ a = EDGE_STACK[--i];
+ }
+ }
+
+ return ar;
+ }
+
+ _link(a, b) {
+ this._halfedges[a] = b;
+ if (b !== -1) this._halfedges[b] = a;
+ }
+
+ // add a new triangle given vertex indices and adjacent half-edge ids
+ _addTriangle(i0, i1, i2, a, b, c) {
+ const t = this.trianglesLen;
+
+ this._triangles[t] = i0;
+ this._triangles[t + 1] = i1;
+ this._triangles[t + 2] = i2;
+
+ this._link(t, a);
+ this._link(t + 1, b);
+ this._link(t + 2, c);
+
+ this.trianglesLen += 3;
+
+ return t;
+ }
+}
+
+// monotonically increases with real angle, but doesn't need expensive trigonometry
+function pseudoAngle(dx, dy) {
+ const p = dx / (Math.abs(dx) + Math.abs(dy));
+ return (dy > 0 ? 3 - p : 1 + p) / 4; // [0..1]
+}
+
+function dist(ax, ay, bx, by) {
+ const dx = ax - bx;
+ const dy = ay - by;
+ return dx * dx + dy * dy;
+}
+
+function inCircle(ax, ay, bx, by, cx, cy, px, py) {
+ const dx = ax - px;
+ const dy = ay - py;
+ const ex = bx - px;
+ const ey = by - py;
+ const fx = cx - px;
+ const fy = cy - py;
+
+ const ap = dx * dx + dy * dy;
+ const bp = ex * ex + ey * ey;
+ const cp = fx * fx + fy * fy;
+
+ return dx * (ey * cp - bp * fy) -
+ dy * (ex * cp - bp * fx) +
+ ap * (ex * fy - ey * fx) < 0;
+}
+
+function circumradius(ax, ay, bx, by, cx, cy) {
+ const dx = bx - ax;
+ const dy = by - ay;
+ const ex = cx - ax;
+ const ey = cy - ay;
+
+ const bl = dx * dx + dy * dy;
+ const cl = ex * ex + ey * ey;
+ const d = 0.5 / (dx * ey - dy * ex);
+
+ const x = (ey * bl - dy * cl) * d;
+ const y = (dx * cl - ex * bl) * d;
+
+ return x * x + y * y;
+}
+
+function circumcenter(ax, ay, bx, by, cx, cy) {
+ const dx = bx - ax;
+ const dy = by - ay;
+ const ex = cx - ax;
+ const ey = cy - ay;
+
+ const bl = dx * dx + dy * dy;
+ const cl = ex * ex + ey * ey;
+ const d = 0.5 / (dx * ey - dy * ex);
+
+ const x = ax + (ey * bl - dy * cl) * d;
+ const y = ay + (dx * cl - ex * bl) * d;
+
+ return {x, y};
+}
+
+function quicksort(ids, dists, left, right) {
+ if (right - left <= 20) {
+ for (let i = left + 1; i <= right; i++) {
+ const temp = ids[i];
+ const tempDist = dists[temp];
+ let j = i - 1;
+ while (j >= left && dists[ids[j]] > tempDist) ids[j + 1] = ids[j--];
+ ids[j + 1] = temp;
+ }
+ } else {
+ const median = (left + right) >> 1;
+ let i = left + 1;
+ let j = right;
+ swap(ids, median, i);
+ if (dists[ids[left]] > dists[ids[right]]) swap(ids, left, right);
+ if (dists[ids[i]] > dists[ids[right]]) swap(ids, i, right);
+ if (dists[ids[left]] > dists[ids[i]]) swap(ids, left, i);
+
+ const temp = ids[i];
+ const tempDist = dists[temp];
+ while (true) {
+ do i++; while (dists[ids[i]] < tempDist);
+ do j--; while (dists[ids[j]] > tempDist);
+ if (j < i) break;
+ swap(ids, i, j);
+ }
+ ids[left + 1] = ids[j];
+ ids[j] = temp;
+
+ if (right - i + 1 >= j - left) {
+ quicksort(ids, dists, i, right);
+ quicksort(ids, dists, left, j - 1);
+ } else {
+ quicksort(ids, dists, left, j - 1);
+ quicksort(ids, dists, i, right);
+ }
+ }
+}
+
+function swap(arr, i, j) {
+ const tmp = arr[i];
+ arr[i] = arr[j];
+ arr[j] = tmp;
+}
+
+function defaultGetX(p) {
+ return p[0];
+}
+function defaultGetY(p) {
+ return p[1];
+}
+
+const epsilon$2 = 1e-6;
+
+class Path {
+ constructor() {
+ this._x0 = this._y0 = // start of current subpath
+ this._x1 = this._y1 = null; // end of current subpath
+ this._ = "";
+ }
+ moveTo(x, y) {
+ this._ += `M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}`;
+ }
+ closePath() {
+ if (this._x1 !== null) {
+ this._x1 = this._x0, this._y1 = this._y0;
+ this._ += "Z";
+ }
+ }
+ lineTo(x, y) {
+ this._ += `L${this._x1 = +x},${this._y1 = +y}`;
+ }
+ arc(x, y, r) {
+ x = +x, y = +y, r = +r;
+ const x0 = x + r;
+ const y0 = y;
+ if (r < 0) throw new Error("negative radius");
+ if (this._x1 === null) this._ += `M${x0},${y0}`;
+ else if (Math.abs(this._x1 - x0) > epsilon$2 || Math.abs(this._y1 - y0) > epsilon$2) this._ += "L" + x0 + "," + y0;
+ if (!r) return;
+ this._ += `A${r},${r},0,1,1,${x - r},${y}A${r},${r},0,1,1,${this._x1 = x0},${this._y1 = y0}`;
+ }
+ rect(x, y, w, h) {
+ this._ += `M${this._x0 = this._x1 = +x},${this._y0 = this._y1 = +y}h${+w}v${+h}h${-w}Z`;
+ }
+ value() {
+ return this._ || null;
+ }
+}
+
+class Polygon {
+ constructor() {
+ this._ = [];
+ }
+ moveTo(x, y) {
+ this._.push([x, y]);
+ }
+ closePath() {
+ this._.push(this._[0].slice());
+ }
+ lineTo(x, y) {
+ this._.push([x, y]);
+ }
+ value() {
+ return this._.length ? this._ : null;
+ }
+}
+
+class Voronoi {
+ constructor(delaunay, [xmin, ymin, xmax, ymax] = [0, 0, 960, 500]) {
+ if (!((xmax = +xmax) >= (xmin = +xmin)) || !((ymax = +ymax) >= (ymin = +ymin))) throw new Error("invalid bounds");
+ this.delaunay = delaunay;
+ this._circumcenters = new Float64Array(delaunay.points.length * 2);
+ this.vectors = new Float64Array(delaunay.points.length * 2);
+ this.xmax = xmax, this.xmin = xmin;
+ this.ymax = ymax, this.ymin = ymin;
+ this._init();
+ }
+ update() {
+ this.delaunay.update();
+ this._init();
+ return this;
+ }
+ _init() {
+ const {delaunay: {points, hull, triangles}, vectors} = this;
+ let bx, by; // lazily computed barycenter of the hull
+
+ // Compute circumcenters.
+ const circumcenters = this.circumcenters = this._circumcenters.subarray(0, triangles.length / 3 * 2);
+ for (let i = 0, j = 0, n = triangles.length, x, y; i < n; i += 3, j += 2) {
+ const t1 = triangles[i] * 2;
+ const t2 = triangles[i + 1] * 2;
+ const t3 = triangles[i + 2] * 2;
+ const x1 = points[t1];
+ const y1 = points[t1 + 1];
+ const x2 = points[t2];
+ const y2 = points[t2 + 1];
+ const x3 = points[t3];
+ const y3 = points[t3 + 1];
+
+ const dx = x2 - x1;
+ const dy = y2 - y1;
+ const ex = x3 - x1;
+ const ey = y3 - y1;
+ const ab = (dx * ey - dy * ex) * 2;
+
+ if (Math.abs(ab) < 1e-9) {
+ // For a degenerate triangle, the circumcenter is at the infinity, in a
+ // direction orthogonal to the halfedge and away from the “center” of
+ // the diagram , defined as the hull’s barycenter.
+ if (bx === undefined) {
+ bx = by = 0;
+ for (const i of hull) bx += points[i * 2], by += points[i * 2 + 1];
+ bx /= hull.length, by /= hull.length;
+ }
+ const a = 1e9 * Math.sign((bx - x1) * ey - (by - y1) * ex);
+ x = (x1 + x3) / 2 - a * ey;
+ y = (y1 + y3) / 2 + a * ex;
+ } else {
+ const d = 1 / ab;
+ const bl = dx * dx + dy * dy;
+ const cl = ex * ex + ey * ey;
+ x = x1 + (ey * bl - dy * cl) * d;
+ y = y1 + (dx * cl - ex * bl) * d;
+ }
+ circumcenters[j] = x;
+ circumcenters[j + 1] = y;
+ }
+
+ // Compute exterior cell rays.
+ let h = hull[hull.length - 1];
+ let p0, p1 = h * 4;
+ let x0, x1 = points[2 * h];
+ let y0, y1 = points[2 * h + 1];
+ vectors.fill(0);
+ for (let i = 0; i < hull.length; ++i) {
+ h = hull[i];
+ p0 = p1, x0 = x1, y0 = y1;
+ p1 = h * 4, x1 = points[2 * h], y1 = points[2 * h + 1];
+ vectors[p0 + 2] = vectors[p1] = y0 - y1;
+ vectors[p0 + 3] = vectors[p1 + 1] = x1 - x0;
+ }
+ }
+ render(context) {
+ const buffer = context == null ? context = new Path : undefined;
+ const {delaunay: {halfedges, inedges, hull}, circumcenters, vectors} = this;
+ if (hull.length <= 1) return null;
+ for (let i = 0, n = halfedges.length; i < n; ++i) {
+ const j = halfedges[i];
+ if (j < i) continue;
+ const ti = Math.floor(i / 3) * 2;
+ const tj = Math.floor(j / 3) * 2;
+ const xi = circumcenters[ti];
+ const yi = circumcenters[ti + 1];
+ const xj = circumcenters[tj];
+ const yj = circumcenters[tj + 1];
+ this._renderSegment(xi, yi, xj, yj, context);
+ }
+ let h0, h1 = hull[hull.length - 1];
+ for (let i = 0; i < hull.length; ++i) {
+ h0 = h1, h1 = hull[i];
+ const t = Math.floor(inedges[h1] / 3) * 2;
+ const x = circumcenters[t];
+ const y = circumcenters[t + 1];
+ const v = h0 * 4;
+ const p = this._project(x, y, vectors[v + 2], vectors[v + 3]);
+ if (p) this._renderSegment(x, y, p[0], p[1], context);
+ }
+ return buffer && buffer.value();
+ }
+ renderBounds(context) {
+ const buffer = context == null ? context = new Path : undefined;
+ context.rect(this.xmin, this.ymin, this.xmax - this.xmin, this.ymax - this.ymin);
+ return buffer && buffer.value();
+ }
+ renderCell(i, context) {
+ const buffer = context == null ? context = new Path : undefined;
+ const points = this._clip(i);
+ if (points === null || !points.length) return;
+ context.moveTo(points[0], points[1]);
+ let n = points.length;
+ while (points[0] === points[n-2] && points[1] === points[n-1] && n > 1) n -= 2;
+ for (let i = 2; i < n; i += 2) {
+ if (points[i] !== points[i-2] || points[i+1] !== points[i-1])
+ context.lineTo(points[i], points[i + 1]);
+ }
+ context.closePath();
+ return buffer && buffer.value();
+ }
+ *cellPolygons() {
+ const {delaunay: {points}} = this;
+ for (let i = 0, n = points.length / 2; i < n; ++i) {
+ const cell = this.cellPolygon(i);
+ if (cell) cell.index = i, yield cell;
+ }
+ }
+ cellPolygon(i) {
+ const polygon = new Polygon;
+ this.renderCell(i, polygon);
+ return polygon.value();
+ }
+ _renderSegment(x0, y0, x1, y1, context) {
+ let S;
+ const c0 = this._regioncode(x0, y0);
+ const c1 = this._regioncode(x1, y1);
+ if (c0 === 0 && c1 === 0) {
+ context.moveTo(x0, y0);
+ context.lineTo(x1, y1);
+ } else if (S = this._clipSegment(x0, y0, x1, y1, c0, c1)) {
+ context.moveTo(S[0], S[1]);
+ context.lineTo(S[2], S[3]);
+ }
+ }
+ contains(i, x, y) {
+ if ((x = +x, x !== x) || (y = +y, y !== y)) return false;
+ return this.delaunay._step(i, x, y) === i;
+ }
+ *neighbors(i) {
+ const ci = this._clip(i);
+ if (ci) for (const j of this.delaunay.neighbors(i)) {
+ const cj = this._clip(j);
+ // find the common edge
+ if (cj) loop: for (let ai = 0, li = ci.length; ai < li; ai += 2) {
+ for (let aj = 0, lj = cj.length; aj < lj; aj += 2) {
+ if (ci[ai] === cj[aj]
+ && ci[ai + 1] === cj[aj + 1]
+ && ci[(ai + 2) % li] === cj[(aj + lj - 2) % lj]
+ && ci[(ai + 3) % li] === cj[(aj + lj - 1) % lj]) {
+ yield j;
+ break loop;
+ }
+ }
+ }
+ }
+ }
+ _cell(i) {
+ const {circumcenters, delaunay: {inedges, halfedges, triangles}} = this;
+ const e0 = inedges[i];
+ if (e0 === -1) return null; // coincident point
+ const points = [];
+ let e = e0;
+ do {
+ const t = Math.floor(e / 3);
+ points.push(circumcenters[t * 2], circumcenters[t * 2 + 1]);
+ e = e % 3 === 2 ? e - 2 : e + 1;
+ if (triangles[e] !== i) break; // bad triangulation
+ e = halfedges[e];
+ } while (e !== e0 && e !== -1);
+ return points;
+ }
+ _clip(i) {
+ // degenerate case (1 valid point: return the box)
+ if (i === 0 && this.delaunay.hull.length === 1) {
+ return [this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax, this.xmin, this.ymin];
+ }
+ const points = this._cell(i);
+ if (points === null) return null;
+ const {vectors: V} = this;
+ const v = i * 4;
+ return this._simplify(V[v] || V[v + 1]
+ ? this._clipInfinite(i, points, V[v], V[v + 1], V[v + 2], V[v + 3])
+ : this._clipFinite(i, points));
+ }
+ _clipFinite(i, points) {
+ const n = points.length;
+ let P = null;
+ let x0, y0, x1 = points[n - 2], y1 = points[n - 1];
+ let c0, c1 = this._regioncode(x1, y1);
+ let e0, e1 = 0;
+ for (let j = 0; j < n; j += 2) {
+ x0 = x1, y0 = y1, x1 = points[j], y1 = points[j + 1];
+ c0 = c1, c1 = this._regioncode(x1, y1);
+ if (c0 === 0 && c1 === 0) {
+ e0 = e1, e1 = 0;
+ if (P) P.push(x1, y1);
+ else P = [x1, y1];
+ } else {
+ let S, sx0, sy0, sx1, sy1;
+ if (c0 === 0) {
+ if ((S = this._clipSegment(x0, y0, x1, y1, c0, c1)) === null) continue;
+ [sx0, sy0, sx1, sy1] = S;
+ } else {
+ if ((S = this._clipSegment(x1, y1, x0, y0, c1, c0)) === null) continue;
+ [sx1, sy1, sx0, sy0] = S;
+ e0 = e1, e1 = this._edgecode(sx0, sy0);
+ if (e0 && e1) this._edge(i, e0, e1, P, P.length);
+ if (P) P.push(sx0, sy0);
+ else P = [sx0, sy0];
+ }
+ e0 = e1, e1 = this._edgecode(sx1, sy1);
+ if (e0 && e1) this._edge(i, e0, e1, P, P.length);
+ if (P) P.push(sx1, sy1);
+ else P = [sx1, sy1];
+ }
+ }
+ if (P) {
+ e0 = e1, e1 = this._edgecode(P[0], P[1]);
+ if (e0 && e1) this._edge(i, e0, e1, P, P.length);
+ } else if (this.contains(i, (this.xmin + this.xmax) / 2, (this.ymin + this.ymax) / 2)) {
+ return [this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax, this.xmin, this.ymin];
+ }
+ return P;
+ }
+ _clipSegment(x0, y0, x1, y1, c0, c1) {
+ // for more robustness, always consider the segment in the same order
+ const flip = c0 < c1;
+ if (flip) [x0, y0, x1, y1, c0, c1] = [x1, y1, x0, y0, c1, c0];
+ while (true) {
+ if (c0 === 0 && c1 === 0) return flip ? [x1, y1, x0, y0] : [x0, y0, x1, y1];
+ if (c0 & c1) return null;
+ let x, y, c = c0 || c1;
+ if (c & 0b1000) x = x0 + (x1 - x0) * (this.ymax - y0) / (y1 - y0), y = this.ymax;
+ else if (c & 0b0100) x = x0 + (x1 - x0) * (this.ymin - y0) / (y1 - y0), y = this.ymin;
+ else if (c & 0b0010) y = y0 + (y1 - y0) * (this.xmax - x0) / (x1 - x0), x = this.xmax;
+ else y = y0 + (y1 - y0) * (this.xmin - x0) / (x1 - x0), x = this.xmin;
+ if (c0) x0 = x, y0 = y, c0 = this._regioncode(x0, y0);
+ else x1 = x, y1 = y, c1 = this._regioncode(x1, y1);
+ }
+ }
+ _clipInfinite(i, points, vx0, vy0, vxn, vyn) {
+ let P = Array.from(points), p;
+ if (p = this._project(P[0], P[1], vx0, vy0)) P.unshift(p[0], p[1]);
+ if (p = this._project(P[P.length - 2], P[P.length - 1], vxn, vyn)) P.push(p[0], p[1]);
+ if (P = this._clipFinite(i, P)) {
+ for (let j = 0, n = P.length, c0, c1 = this._edgecode(P[n - 2], P[n - 1]); j < n; j += 2) {
+ c0 = c1, c1 = this._edgecode(P[j], P[j + 1]);
+ if (c0 && c1) j = this._edge(i, c0, c1, P, j), n = P.length;
+ }
+ } else if (this.contains(i, (this.xmin + this.xmax) / 2, (this.ymin + this.ymax) / 2)) {
+ P = [this.xmin, this.ymin, this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax];
+ }
+ return P;
+ }
+ _edge(i, e0, e1, P, j) {
+ while (e0 !== e1) {
+ let x, y;
+ switch (e0) {
+ case 0b0101: e0 = 0b0100; continue; // top-left
+ case 0b0100: e0 = 0b0110, x = this.xmax, y = this.ymin; break; // top
+ case 0b0110: e0 = 0b0010; continue; // top-right
+ case 0b0010: e0 = 0b1010, x = this.xmax, y = this.ymax; break; // right
+ case 0b1010: e0 = 0b1000; continue; // bottom-right
+ case 0b1000: e0 = 0b1001, x = this.xmin, y = this.ymax; break; // bottom
+ case 0b1001: e0 = 0b0001; continue; // bottom-left
+ case 0b0001: e0 = 0b0101, x = this.xmin, y = this.ymin; break; // left
+ }
+ // Note: this implicitly checks for out of bounds: if P[j] or P[j+1] are
+ // undefined, the conditional statement will be executed.
+ if ((P[j] !== x || P[j + 1] !== y) && this.contains(i, x, y)) {
+ P.splice(j, 0, x, y), j += 2;
+ }
+ }
+ return j;
+ }
+ _project(x0, y0, vx, vy) {
+ let t = Infinity, c, x, y;
+ if (vy < 0) { // top
+ if (y0 <= this.ymin) return null;
+ if ((c = (this.ymin - y0) / vy) < t) y = this.ymin, x = x0 + (t = c) * vx;
+ } else if (vy > 0) { // bottom
+ if (y0 >= this.ymax) return null;
+ if ((c = (this.ymax - y0) / vy) < t) y = this.ymax, x = x0 + (t = c) * vx;
+ }
+ if (vx > 0) { // right
+ if (x0 >= this.xmax) return null;
+ if ((c = (this.xmax - x0) / vx) < t) x = this.xmax, y = y0 + (t = c) * vy;
+ } else if (vx < 0) { // left
+ if (x0 <= this.xmin) return null;
+ if ((c = (this.xmin - x0) / vx) < t) x = this.xmin, y = y0 + (t = c) * vy;
+ }
+ return [x, y];
+ }
+ _edgecode(x, y) {
+ return (x === this.xmin ? 0b0001
+ : x === this.xmax ? 0b0010 : 0b0000)
+ | (y === this.ymin ? 0b0100
+ : y === this.ymax ? 0b1000 : 0b0000);
+ }
+ _regioncode(x, y) {
+ return (x < this.xmin ? 0b0001
+ : x > this.xmax ? 0b0010 : 0b0000)
+ | (y < this.ymin ? 0b0100
+ : y > this.ymax ? 0b1000 : 0b0000);
+ }
+ _simplify(P) {
+ if (P && P.length > 4) {
+ for (let i = 0; i < P.length; i+= 2) {
+ const j = (i + 2) % P.length, k = (i + 4) % P.length;
+ if (P[i] === P[j] && P[j] === P[k] || P[i + 1] === P[j + 1] && P[j + 1] === P[k + 1]) {
+ P.splice(j, 2), i -= 2;
+ }
+ }
+ if (!P.length) P = null;
+ }
+ return P;
+ }
+}
+
+const tau$2 = 2 * Math.PI, pow$2 = Math.pow;
+
+function pointX(p) {
+ return p[0];
+}
+
+function pointY(p) {
+ return p[1];
+}
+
+// A triangulation is collinear if all its triangles have a non-null area
+function collinear(d) {
+ const {triangles, coords} = d;
+ for (let i = 0; i < triangles.length; i += 3) {
+ const a = 2 * triangles[i],
+ b = 2 * triangles[i + 1],
+ c = 2 * triangles[i + 2],
+ cross = (coords[c] - coords[a]) * (coords[b + 1] - coords[a + 1])
+ - (coords[b] - coords[a]) * (coords[c + 1] - coords[a + 1]);
+ if (cross > 1e-10) return false;
+ }
+ return true;
+}
+
+function jitter(x, y, r) {
+ return [x + Math.sin(x + y) * r, y + Math.cos(x - y) * r];
+}
+
+class Delaunay {
+ static from(points, fx = pointX, fy = pointY, that) {
+ return new Delaunay("length" in points
+ ? flatArray(points, fx, fy, that)
+ : Float64Array.from(flatIterable(points, fx, fy, that)));
+ }
+ constructor(points) {
+ this._delaunator = new Delaunator(points);
+ this.inedges = new Int32Array(points.length / 2);
+ this._hullIndex = new Int32Array(points.length / 2);
+ this.points = this._delaunator.coords;
+ this._init();
+ }
+ update() {
+ this._delaunator.update();
+ this._init();
+ return this;
+ }
+ _init() {
+ const d = this._delaunator, points = this.points;
+
+ // check for collinear
+ if (d.hull && d.hull.length > 2 && collinear(d)) {
+ this.collinear = Int32Array.from({length: points.length/2}, (_,i) => i)
+ .sort((i, j) => points[2 * i] - points[2 * j] || points[2 * i + 1] - points[2 * j + 1]); // for exact neighbors
+ const e = this.collinear[0], f = this.collinear[this.collinear.length - 1],
+ bounds = [ points[2 * e], points[2 * e + 1], points[2 * f], points[2 * f + 1] ],
+ r = 1e-8 * Math.hypot(bounds[3] - bounds[1], bounds[2] - bounds[0]);
+ for (let i = 0, n = points.length / 2; i < n; ++i) {
+ const p = jitter(points[2 * i], points[2 * i + 1], r);
+ points[2 * i] = p[0];
+ points[2 * i + 1] = p[1];
+ }
+ this._delaunator = new Delaunator(points);
+ } else {
+ delete this.collinear;
+ }
+
+ const halfedges = this.halfedges = this._delaunator.halfedges;
+ const hull = this.hull = this._delaunator.hull;
+ const triangles = this.triangles = this._delaunator.triangles;
+ const inedges = this.inedges.fill(-1);
+ const hullIndex = this._hullIndex.fill(-1);
+
+ // Compute an index from each point to an (arbitrary) incoming halfedge
+ // Used to give the first neighbor of each point; for this reason,
+ // on the hull we give priority to exterior halfedges
+ for (let e = 0, n = halfedges.length; e < n; ++e) {
+ const p = triangles[e % 3 === 2 ? e - 2 : e + 1];
+ if (halfedges[e] === -1 || inedges[p] === -1) inedges[p] = e;
+ }
+ for (let i = 0, n = hull.length; i < n; ++i) {
+ hullIndex[hull[i]] = i;
+ }
+
+ // degenerate case: 1 or 2 (distinct) points
+ if (hull.length <= 2 && hull.length > 0) {
+ this.triangles = new Int32Array(3).fill(-1);
+ this.halfedges = new Int32Array(3).fill(-1);
+ this.triangles[0] = hull[0];
+ inedges[hull[0]] = 1;
+ if (hull.length === 2) {
+ inedges[hull[1]] = 0;
+ this.triangles[1] = hull[1];
+ this.triangles[2] = hull[1];
+ }
+ }
+ }
+ voronoi(bounds) {
+ return new Voronoi(this, bounds);
+ }
+ *neighbors(i) {
+ const {inedges, hull, _hullIndex, halfedges, triangles, collinear} = this;
+
+ // degenerate case with several collinear points
+ if (collinear) {
+ const l = collinear.indexOf(i);
+ if (l > 0) yield collinear[l - 1];
+ if (l < collinear.length - 1) yield collinear[l + 1];
+ return;
+ }
+
+ const e0 = inedges[i];
+ if (e0 === -1) return; // coincident point
+ let e = e0, p0 = -1;
+ do {
+ yield p0 = triangles[e];
+ e = e % 3 === 2 ? e - 2 : e + 1;
+ if (triangles[e] !== i) return; // bad triangulation
+ e = halfedges[e];
+ if (e === -1) {
+ const p = hull[(_hullIndex[i] + 1) % hull.length];
+ if (p !== p0) yield p;
+ return;
+ }
+ } while (e !== e0);
+ }
+ find(x, y, i = 0) {
+ if ((x = +x, x !== x) || (y = +y, y !== y)) return -1;
+ const i0 = i;
+ let c;
+ while ((c = this._step(i, x, y)) >= 0 && c !== i && c !== i0) i = c;
+ return c;
+ }
+ _step(i, x, y) {
+ const {inedges, hull, _hullIndex, halfedges, triangles, points} = this;
+ if (inedges[i] === -1 || !points.length) return (i + 1) % (points.length >> 1);
+ let c = i;
+ let dc = pow$2(x - points[i * 2], 2) + pow$2(y - points[i * 2 + 1], 2);
+ const e0 = inedges[i];
+ let e = e0;
+ do {
+ let t = triangles[e];
+ const dt = pow$2(x - points[t * 2], 2) + pow$2(y - points[t * 2 + 1], 2);
+ if (dt < dc) dc = dt, c = t;
+ e = e % 3 === 2 ? e - 2 : e + 1;
+ if (triangles[e] !== i) break; // bad triangulation
+ e = halfedges[e];
+ if (e === -1) {
+ e = hull[(_hullIndex[i] + 1) % hull.length];
+ if (e !== t) {
+ if (pow$2(x - points[e * 2], 2) + pow$2(y - points[e * 2 + 1], 2) < dc) return e;
+ }
+ break;
+ }
+ } while (e !== e0);
+ return c;
+ }
+ render(context) {
+ const buffer = context == null ? context = new Path : undefined;
+ const {points, halfedges, triangles} = this;
+ for (let i = 0, n = halfedges.length; i < n; ++i) {
+ const j = halfedges[i];
+ if (j < i) continue;
+ const ti = triangles[i] * 2;
+ const tj = triangles[j] * 2;
+ context.moveTo(points[ti], points[ti + 1]);
+ context.lineTo(points[tj], points[tj + 1]);
+ }
+ this.renderHull(context);
+ return buffer && buffer.value();
+ }
+ renderPoints(context, r) {
+ if (r === undefined && (!context || typeof context.moveTo !== "function")) r = context, context = null;
+ r = r == undefined ? 2 : +r;
+ const buffer = context == null ? context = new Path : undefined;
+ const {points} = this;
+ for (let i = 0, n = points.length; i < n; i += 2) {
+ const x = points[i], y = points[i + 1];
+ context.moveTo(x + r, y);
+ context.arc(x, y, r, 0, tau$2);
+ }
+ return buffer && buffer.value();
+ }
+ renderHull(context) {
+ const buffer = context == null ? context = new Path : undefined;
+ const {hull, points} = this;
+ const h = hull[0] * 2, n = hull.length;
+ context.moveTo(points[h], points[h + 1]);
+ for (let i = 1; i < n; ++i) {
+ const h = 2 * hull[i];
+ context.lineTo(points[h], points[h + 1]);
+ }
+ context.closePath();
+ return buffer && buffer.value();
+ }
+ hullPolygon() {
+ const polygon = new Polygon;
+ this.renderHull(polygon);
+ return polygon.value();
+ }
+ renderTriangle(i, context) {
+ const buffer = context == null ? context = new Path : undefined;
+ const {points, triangles} = this;
+ const t0 = triangles[i *= 3] * 2;
+ const t1 = triangles[i + 1] * 2;
+ const t2 = triangles[i + 2] * 2;
+ context.moveTo(points[t0], points[t0 + 1]);
+ context.lineTo(points[t1], points[t1 + 1]);
+ context.lineTo(points[t2], points[t2 + 1]);
+ context.closePath();
+ return buffer && buffer.value();
+ }
+ *trianglePolygons() {
+ const {triangles} = this;
+ for (let i = 0, n = triangles.length / 3; i < n; ++i) {
+ yield this.trianglePolygon(i);
+ }
+ }
+ trianglePolygon(i) {
+ const polygon = new Polygon;
+ this.renderTriangle(i, polygon);
+ return polygon.value();
+ }
+}
+
+function flatArray(points, fx, fy, that) {
+ const n = points.length;
+ const array = new Float64Array(n * 2);
+ for (let i = 0; i < n; ++i) {
+ const p = points[i];
+ array[i * 2] = fx.call(that, p, i, points);
+ array[i * 2 + 1] = fy.call(that, p, i, points);
+ }
+ return array;
+}
+
+function* flatIterable(points, fx, fy, that) {
+ let i = 0;
+ for (const p of points) {
+ yield fx.call(that, p, i, points);
+ yield fy.call(that, p, i, points);
+ ++i;
+ }
+}
+
+var EOL = {},
+ EOF = {},
+ QUOTE = 34,
+ NEWLINE = 10,
+ RETURN = 13;
+
+function objectConverter(columns) {
+ return new Function("d", "return {" + columns.map(function(name, i) {
+ return JSON.stringify(name) + ": d[" + i + "] || \"\"";
+ }).join(",") + "}");
+}
+
+function customConverter(columns, f) {
+ var object = objectConverter(columns);
+ return function(row, i) {
+ return f(object(row), i, columns);
+ };
+}
+
+// Compute unique columns in order of discovery.
+function inferColumns(rows) {
+ var columnSet = Object.create(null),
+ columns = [];
+
+ rows.forEach(function(row) {
+ for (var column in row) {
+ if (!(column in columnSet)) {
+ columns.push(columnSet[column] = column);
+ }
+ }
+ });
+
+ return columns;
+}
+
+function pad$1(value, width) {
+ var s = value + "", length = s.length;
+ return length < width ? new Array(width - length + 1).join(0) + s : s;
+}
+
+function formatYear$1(year) {
+ return year < 0 ? "-" + pad$1(-year, 6)
+ : year > 9999 ? "+" + pad$1(year, 6)
+ : pad$1(year, 4);
+}
+
+function formatDate(date) {
+ var hours = date.getUTCHours(),
+ minutes = date.getUTCMinutes(),
+ seconds = date.getUTCSeconds(),
+ milliseconds = date.getUTCMilliseconds();
+ return isNaN(date) ? "Invalid Date"
+ : formatYear$1(date.getUTCFullYear()) + "-" + pad$1(date.getUTCMonth() + 1, 2) + "-" + pad$1(date.getUTCDate(), 2)
+ + (milliseconds ? "T" + pad$1(hours, 2) + ":" + pad$1(minutes, 2) + ":" + pad$1(seconds, 2) + "." + pad$1(milliseconds, 3) + "Z"
+ : seconds ? "T" + pad$1(hours, 2) + ":" + pad$1(minutes, 2) + ":" + pad$1(seconds, 2) + "Z"
+ : minutes || hours ? "T" + pad$1(hours, 2) + ":" + pad$1(minutes, 2) + "Z"
+ : "");
+}
+
+function dsvFormat(delimiter) {
+ var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
+ DELIMITER = delimiter.charCodeAt(0);
+
+ function parse(text, f) {
+ var convert, columns, rows = parseRows(text, function(row, i) {
+ if (convert) return convert(row, i - 1);
+ columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
+ });
+ rows.columns = columns || [];
+ return rows;
+ }
+
+ function parseRows(text, f) {
+ var rows = [], // output rows
+ N = text.length,
+ I = 0, // current character index
+ n = 0, // current line number
+ t, // current token
+ eof = N <= 0, // current token followed by EOF?
+ eol = false; // current token followed by EOL?
+
+ // Strip the trailing newline.
+ if (text.charCodeAt(N - 1) === NEWLINE) --N;
+ if (text.charCodeAt(N - 1) === RETURN) --N;
+
+ function token() {
+ if (eof) return EOF;
+ if (eol) return eol = false, EOL;
+
+ // Unescape quotes.
+ var i, j = I, c;
+ if (text.charCodeAt(j) === QUOTE) {
+ while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);
+ if ((i = I) >= N) eof = true;
+ else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;
+ else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+ return text.slice(j + 1, i - 1).replace(/""/g, "\"");
+ }
+
+ // Find next delimiter or newline.
+ while (I < N) {
+ if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
+ else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+ else if (c !== DELIMITER) continue;
+ return text.slice(j, i);
+ }
+
+ // Return last token before EOF.
+ return eof = true, text.slice(j, N);
+ }
+
+ while ((t = token()) !== EOF) {
+ var row = [];
+ while (t !== EOL && t !== EOF) row.push(t), t = token();
+ if (f && (row = f(row, n++)) == null) continue;
+ rows.push(row);
+ }
+
+ return rows;
+ }
+
+ function preformatBody(rows, columns) {
+ return rows.map(function(row) {
+ return columns.map(function(column) {
+ return formatValue(row[column]);
+ }).join(delimiter);
+ });
+ }
+
+ function format(rows, columns) {
+ if (columns == null) columns = inferColumns(rows);
+ return [columns.map(formatValue).join(delimiter)].concat(preformatBody(rows, columns)).join("\n");
+ }
+
+ function formatBody(rows, columns) {
+ if (columns == null) columns = inferColumns(rows);
+ return preformatBody(rows, columns).join("\n");
+ }
+
+ function formatRows(rows) {
+ return rows.map(formatRow).join("\n");
+ }
+
+ function formatRow(row) {
+ return row.map(formatValue).join(delimiter);
+ }
+
+ function formatValue(value) {
+ return value == null ? ""
+ : value instanceof Date ? formatDate(value)
+ : reFormat.test(value += "") ? "\"" + value.replace(/"/g, "\"\"") + "\""
+ : value;
+ }
+
+ return {
+ parse: parse,
+ parseRows: parseRows,
+ format: format,
+ formatBody: formatBody,
+ formatRows: formatRows,
+ formatRow: formatRow,
+ formatValue: formatValue
+ };
+}
+
+var csv$1 = dsvFormat(",");
+
+var csvParse = csv$1.parse;
+var csvParseRows = csv$1.parseRows;
+var csvFormat = csv$1.format;
+var csvFormatBody = csv$1.formatBody;
+var csvFormatRows = csv$1.formatRows;
+var csvFormatRow = csv$1.formatRow;
+var csvFormatValue = csv$1.formatValue;
+
+var tsv$1 = dsvFormat("\t");
+
+var tsvParse = tsv$1.parse;
+var tsvParseRows = tsv$1.parseRows;
+var tsvFormat = tsv$1.format;
+var tsvFormatBody = tsv$1.formatBody;
+var tsvFormatRows = tsv$1.formatRows;
+var tsvFormatRow = tsv$1.formatRow;
+var tsvFormatValue = tsv$1.formatValue;
+
+function autoType(object) {
+ for (var key in object) {
+ var value = object[key].trim(), number, m;
+ if (!value) value = null;
+ else if (value === "true") value = true;
+ else if (value === "false") value = false;
+ else if (value === "NaN") value = NaN;
+ else if (!isNaN(number = +value)) value = number;
+ else if (m = value.match(/^([-+]\d{2})?\d{4}(-\d{2}(-\d{2})?)?(T\d{2}:\d{2}(:\d{2}(\.\d{3})?)?(Z|[-+]\d{2}:\d{2})?)?$/)) {
+ if (fixtz && !!m[4] && !m[7]) value = value.replace(/-/g, "/").replace(/T/, " ");
+ value = new Date(value);
+ }
+ else continue;
+ object[key] = value;
+ }
+ return object;
+}
+
+// https://github.com/d3/d3-dsv/issues/45
+const fixtz = new Date("2019-01-01T00:00").getHours() || new Date("2019-07-01T00:00").getHours();
+
+function responseBlob(response) {
+ if (!response.ok) throw new Error(response.status + " " + response.statusText);
+ return response.blob();
+}
+
+function blob(input, init) {
+ return fetch(input, init).then(responseBlob);
+}
+
+function responseArrayBuffer(response) {
+ if (!response.ok) throw new Error(response.status + " " + response.statusText);
+ return response.arrayBuffer();
+}
+
+function buffer(input, init) {
+ return fetch(input, init).then(responseArrayBuffer);
+}
+
+function responseText(response) {
+ if (!response.ok) throw new Error(response.status + " " + response.statusText);
+ return response.text();
+}
+
+function text(input, init) {
+ return fetch(input, init).then(responseText);
+}
+
+function dsvParse(parse) {
+ return function(input, init, row) {
+ if (arguments.length === 2 && typeof init === "function") row = init, init = undefined;
+ return text(input, init).then(function(response) {
+ return parse(response, row);
+ });
+ };
+}
+
+function dsv(delimiter, input, init, row) {
+ if (arguments.length === 3 && typeof init === "function") row = init, init = undefined;
+ var format = dsvFormat(delimiter);
+ return text(input, init).then(function(response) {
+ return format.parse(response, row);
+ });
+}
+
+var csv = dsvParse(csvParse);
+var tsv = dsvParse(tsvParse);
+
+function image(input, init) {
+ return new Promise(function(resolve, reject) {
+ var image = new Image;
+ for (var key in init) image[key] = init[key];
+ image.onerror = reject;
+ image.onload = function() { resolve(image); };
+ image.src = input;
+ });
+}
+
+function responseJson(response) {
+ if (!response.ok) throw new Error(response.status + " " + response.statusText);
+ if (response.status === 204 || response.status === 205) return;
+ return response.json();
+}
+
+function json(input, init) {
+ return fetch(input, init).then(responseJson);
+}
+
+function parser(type) {
+ return (input, init) => text(input, init)
+ .then(text => (new DOMParser).parseFromString(text, type));
+}
+
+var xml = parser("application/xml");
+
+var html = parser("text/html");
+
+var svg = parser("image/svg+xml");
+
+function center(x, y) {
+ var nodes, strength = 1;
+
+ if (x == null) x = 0;
+ if (y == null) y = 0;
+
+ function force() {
+ var i,
+ n = nodes.length,
+ node,
+ sx = 0,
+ sy = 0;
+
+ for (i = 0; i < n; ++i) {
+ node = nodes[i], sx += node.x, sy += node.y;
+ }
+
+ for (sx = (sx / n - x) * strength, sy = (sy / n - y) * strength, i = 0; i < n; ++i) {
+ node = nodes[i], node.x -= sx, node.y -= sy;
+ }
+ }
+
+ force.initialize = function(_) {
+ nodes = _;
+ };
+
+ force.x = function(_) {
+ return arguments.length ? (x = +_, force) : x;
+ };
+
+ force.y = function(_) {
+ return arguments.length ? (y = +_, force) : y;
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = +_, force) : strength;
+ };
+
+ return force;
+}
+
+function tree_add(d) {
+ const x = +this._x.call(null, d),
+ y = +this._y.call(null, d);
+ return add(this.cover(x, y), x, y, d);
+}
+
+function add(tree, x, y, d) {
+ if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
+
+ var parent,
+ node = tree._root,
+ leaf = {data: d},
+ x0 = tree._x0,
+ y0 = tree._y0,
+ x1 = tree._x1,
+ y1 = tree._y1,
+ xm,
+ ym,
+ xp,
+ yp,
+ right,
+ bottom,
+ i,
+ j;
+
+ // If the tree is empty, initialize the root as a leaf.
+ if (!node) return tree._root = leaf, tree;
+
+ // Find the existing leaf for the new point, or add it.
+ while (node.length) {
+ if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+ if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+ if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
+ }
+
+ // Is the new point is exactly coincident with the existing point?
+ xp = +tree._x.call(null, node.data);
+ yp = +tree._y.call(null, node.data);
+ if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
+
+ // Otherwise, split the leaf node until the old and new point are separated.
+ do {
+ parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
+ if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+ if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+ } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
+ return parent[j] = node, parent[i] = leaf, tree;
+}
+
+function addAll(data) {
+ var d, i, n = data.length,
+ x,
+ y,
+ xz = new Array(n),
+ yz = new Array(n),
+ x0 = Infinity,
+ y0 = Infinity,
+ x1 = -Infinity,
+ y1 = -Infinity;
+
+ // Compute the points and their extent.
+ for (i = 0; i < n; ++i) {
+ if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
+ xz[i] = x;
+ yz[i] = y;
+ if (x < x0) x0 = x;
+ if (x > x1) x1 = x;
+ if (y < y0) y0 = y;
+ if (y > y1) y1 = y;
+ }
+
+ // If there were no (valid) points, abort.
+ if (x0 > x1 || y0 > y1) return this;
+
+ // Expand the tree to cover the new points.
+ this.cover(x0, y0).cover(x1, y1);
+
+ // Add the new points.
+ for (i = 0; i < n; ++i) {
+ add(this, xz[i], yz[i], data[i]);
+ }
+
+ return this;
+}
+
+function tree_cover(x, y) {
+ if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
+
+ var x0 = this._x0,
+ y0 = this._y0,
+ x1 = this._x1,
+ y1 = this._y1;
+
+ // If the quadtree has no extent, initialize them.
+ // Integer extent are necessary so that if we later double the extent,
+ // the existing quadrant boundaries don’t change due to floating point error!
+ if (isNaN(x0)) {
+ x1 = (x0 = Math.floor(x)) + 1;
+ y1 = (y0 = Math.floor(y)) + 1;
+ }
+
+ // Otherwise, double repeatedly to cover.
+ else {
+ var z = x1 - x0 || 1,
+ node = this._root,
+ parent,
+ i;
+
+ while (x0 > x || x >= x1 || y0 > y || y >= y1) {
+ i = (y < y0) << 1 | (x < x0);
+ parent = new Array(4), parent[i] = node, node = parent, z *= 2;
+ switch (i) {
+ case 0: x1 = x0 + z, y1 = y0 + z; break;
+ case 1: x0 = x1 - z, y1 = y0 + z; break;
+ case 2: x1 = x0 + z, y0 = y1 - z; break;
+ case 3: x0 = x1 - z, y0 = y1 - z; break;
+ }
+ }
+
+ if (this._root && this._root.length) this._root = node;
+ }
+
+ this._x0 = x0;
+ this._y0 = y0;
+ this._x1 = x1;
+ this._y1 = y1;
+ return this;
+}
+
+function tree_data() {
+ var data = [];
+ this.visit(function(node) {
+ if (!node.length) do data.push(node.data); while (node = node.next)
+ });
+ return data;
+}
+
+function tree_extent(_) {
+ return arguments.length
+ ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
+ : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
+}
+
+function Quad(node, x0, y0, x1, y1) {
+ this.node = node;
+ this.x0 = x0;
+ this.y0 = y0;
+ this.x1 = x1;
+ this.y1 = y1;
+}
+
+function tree_find(x, y, radius) {
+ var data,
+ x0 = this._x0,
+ y0 = this._y0,
+ x1,
+ y1,
+ x2,
+ y2,
+ x3 = this._x1,
+ y3 = this._y1,
+ quads = [],
+ node = this._root,
+ q,
+ i;
+
+ if (node) quads.push(new Quad(node, x0, y0, x3, y3));
+ if (radius == null) radius = Infinity;
+ else {
+ x0 = x - radius, y0 = y - radius;
+ x3 = x + radius, y3 = y + radius;
+ radius *= radius;
+ }
+
+ while (q = quads.pop()) {
+
+ // Stop searching if this quadrant can’t contain a closer node.
+ if (!(node = q.node)
+ || (x1 = q.x0) > x3
+ || (y1 = q.y0) > y3
+ || (x2 = q.x1) < x0
+ || (y2 = q.y1) < y0) continue;
+
+ // Bisect the current quadrant.
+ if (node.length) {
+ var xm = (x1 + x2) / 2,
+ ym = (y1 + y2) / 2;
+
+ quads.push(
+ new Quad(node[3], xm, ym, x2, y2),
+ new Quad(node[2], x1, ym, xm, y2),
+ new Quad(node[1], xm, y1, x2, ym),
+ new Quad(node[0], x1, y1, xm, ym)
+ );
+
+ // Visit the closest quadrant first.
+ if (i = (y >= ym) << 1 | (x >= xm)) {
+ q = quads[quads.length - 1];
+ quads[quads.length - 1] = quads[quads.length - 1 - i];
+ quads[quads.length - 1 - i] = q;
+ }
+ }
+
+ // Visit this point. (Visiting coincident points isn’t necessary!)
+ else {
+ var dx = x - +this._x.call(null, node.data),
+ dy = y - +this._y.call(null, node.data),
+ d2 = dx * dx + dy * dy;
+ if (d2 < radius) {
+ var d = Math.sqrt(radius = d2);
+ x0 = x - d, y0 = y - d;
+ x3 = x + d, y3 = y + d;
+ data = node.data;
+ }
+ }
+ }
+
+ return data;
+}
+
+function tree_remove(d) {
+ if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
+
+ var parent,
+ node = this._root,
+ retainer,
+ previous,
+ next,
+ x0 = this._x0,
+ y0 = this._y0,
+ x1 = this._x1,
+ y1 = this._y1,
+ x,
+ y,
+ xm,
+ ym,
+ right,
+ bottom,
+ i,
+ j;
+
+ // If the tree is empty, initialize the root as a leaf.
+ if (!node) return this;
+
+ // Find the leaf node for the point.
+ // While descending, also retain the deepest parent with a non-removed sibling.
+ if (node.length) while (true) {
+ if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+ if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+ if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
+ if (!node.length) break;
+ if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
+ }
+
+ // Find the point to remove.
+ while (node.data !== d) if (!(previous = node, node = node.next)) return this;
+ if (next = node.next) delete node.next;
+
+ // If there are multiple coincident points, remove just the point.
+ if (previous) return (next ? previous.next = next : delete previous.next), this;
+
+ // If this is the root point, remove it.
+ if (!parent) return this._root = next, this;
+
+ // Remove this leaf.
+ next ? parent[i] = next : delete parent[i];
+
+ // If the parent now contains exactly one leaf, collapse superfluous parents.
+ if ((node = parent[0] || parent[1] || parent[2] || parent[3])
+ && node === (parent[3] || parent[2] || parent[1] || parent[0])
+ && !node.length) {
+ if (retainer) retainer[j] = node;
+ else this._root = node;
+ }
+
+ return this;
+}
+
+function removeAll(data) {
+ for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
+ return this;
+}
+
+function tree_root() {
+ return this._root;
+}
+
+function tree_size() {
+ var size = 0;
+ this.visit(function(node) {
+ if (!node.length) do ++size; while (node = node.next)
+ });
+ return size;
+}
+
+function tree_visit(callback) {
+ var quads = [], q, node = this._root, child, x0, y0, x1, y1;
+ if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
+ while (q = quads.pop()) {
+ if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
+ var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+ if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+ if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+ if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+ if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+ }
+ }
+ return this;
+}
+
+function tree_visitAfter(callback) {
+ var quads = [], next = [], q;
+ if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
+ while (q = quads.pop()) {
+ var node = q.node;
+ if (node.length) {
+ var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+ if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+ if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+ if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+ if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+ }
+ next.push(q);
+ }
+ while (q = next.pop()) {
+ callback(q.node, q.x0, q.y0, q.x1, q.y1);
+ }
+ return this;
+}
+
+function defaultX(d) {
+ return d[0];
+}
+
+function tree_x(_) {
+ return arguments.length ? (this._x = _, this) : this._x;
+}
+
+function defaultY(d) {
+ return d[1];
+}
+
+function tree_y(_) {
+ return arguments.length ? (this._y = _, this) : this._y;
+}
+
+function quadtree(nodes, x, y) {
+ var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
+ return nodes == null ? tree : tree.addAll(nodes);
+}
+
+function Quadtree(x, y, x0, y0, x1, y1) {
+ this._x = x;
+ this._y = y;
+ this._x0 = x0;
+ this._y0 = y0;
+ this._x1 = x1;
+ this._y1 = y1;
+ this._root = undefined;
+}
+
+function leaf_copy(leaf) {
+ var copy = {data: leaf.data}, next = copy;
+ while (leaf = leaf.next) next = next.next = {data: leaf.data};
+ return copy;
+}
+
+var treeProto = quadtree.prototype = Quadtree.prototype;
+
+treeProto.copy = function() {
+ var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
+ node = this._root,
+ nodes,
+ child;
+
+ if (!node) return copy;
+
+ if (!node.length) return copy._root = leaf_copy(node), copy;
+
+ nodes = [{source: node, target: copy._root = new Array(4)}];
+ while (node = nodes.pop()) {
+ for (var i = 0; i < 4; ++i) {
+ if (child = node.source[i]) {
+ if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
+ else node.target[i] = leaf_copy(child);
+ }
+ }
+ }
+
+ return copy;
+};
+
+treeProto.add = tree_add;
+treeProto.addAll = addAll;
+treeProto.cover = tree_cover;
+treeProto.data = tree_data;
+treeProto.extent = tree_extent;
+treeProto.find = tree_find;
+treeProto.remove = tree_remove;
+treeProto.removeAll = removeAll;
+treeProto.root = tree_root;
+treeProto.size = tree_size;
+treeProto.visit = tree_visit;
+treeProto.visitAfter = tree_visitAfter;
+treeProto.x = tree_x;
+treeProto.y = tree_y;
+
+function constant$4(x) {
+ return function() {
+ return x;
+ };
+}
+
+function jiggle(random) {
+ return (random() - 0.5) * 1e-6;
+}
+
+function x$3(d) {
+ return d.x + d.vx;
+}
+
+function y$3(d) {
+ return d.y + d.vy;
+}
+
+function collide(radius) {
+ var nodes,
+ radii,
+ random,
+ strength = 1,
+ iterations = 1;
+
+ if (typeof radius !== "function") radius = constant$4(radius == null ? 1 : +radius);
+
+ function force() {
+ var i, n = nodes.length,
+ tree,
+ node,
+ xi,
+ yi,
+ ri,
+ ri2;
+
+ for (var k = 0; k < iterations; ++k) {
+ tree = quadtree(nodes, x$3, y$3).visitAfter(prepare);
+ for (i = 0; i < n; ++i) {
+ node = nodes[i];
+ ri = radii[node.index], ri2 = ri * ri;
+ xi = node.x + node.vx;
+ yi = node.y + node.vy;
+ tree.visit(apply);
+ }
+ }
+
+ function apply(quad, x0, y0, x1, y1) {
+ var data = quad.data, rj = quad.r, r = ri + rj;
+ if (data) {
+ if (data.index > node.index) {
+ var x = xi - data.x - data.vx,
+ y = yi - data.y - data.vy,
+ l = x * x + y * y;
+ if (l < r * r) {
+ if (x === 0) x = jiggle(random), l += x * x;
+ if (y === 0) y = jiggle(random), l += y * y;
+ l = (r - (l = Math.sqrt(l))) / l * strength;
+ node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
+ node.vy += (y *= l) * r;
+ data.vx -= x * (r = 1 - r);
+ data.vy -= y * r;
+ }
+ }
+ return;
+ }
+ return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
+ }
+ }
+
+ function prepare(quad) {
+ if (quad.data) return quad.r = radii[quad.data.index];
+ for (var i = quad.r = 0; i < 4; ++i) {
+ if (quad[i] && quad[i].r > quad.r) {
+ quad.r = quad[i].r;
+ }
+ }
+ }
+
+ function initialize() {
+ if (!nodes) return;
+ var i, n = nodes.length, node;
+ radii = new Array(n);
+ for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
+ }
+
+ force.initialize = function(_nodes, _random) {
+ nodes = _nodes;
+ random = _random;
+ initialize();
+ };
+
+ force.iterations = function(_) {
+ return arguments.length ? (iterations = +_, force) : iterations;
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = +_, force) : strength;
+ };
+
+ force.radius = function(_) {
+ return arguments.length ? (radius = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : radius;
+ };
+
+ return force;
+}
+
+function index$3(d) {
+ return d.index;
+}
+
+function find(nodeById, nodeId) {
+ var node = nodeById.get(nodeId);
+ if (!node) throw new Error("node not found: " + nodeId);
+ return node;
+}
+
+function link$2(links) {
+ var id = index$3,
+ strength = defaultStrength,
+ strengths,
+ distance = constant$4(30),
+ distances,
+ nodes,
+ count,
+ bias,
+ random,
+ iterations = 1;
+
+ if (links == null) links = [];
+
+ function defaultStrength(link) {
+ return 1 / Math.min(count[link.source.index], count[link.target.index]);
+ }
+
+ function force(alpha) {
+ for (var k = 0, n = links.length; k < iterations; ++k) {
+ for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
+ link = links[i], source = link.source, target = link.target;
+ x = target.x + target.vx - source.x - source.vx || jiggle(random);
+ y = target.y + target.vy - source.y - source.vy || jiggle(random);
+ l = Math.sqrt(x * x + y * y);
+ l = (l - distances[i]) / l * alpha * strengths[i];
+ x *= l, y *= l;
+ target.vx -= x * (b = bias[i]);
+ target.vy -= y * b;
+ source.vx += x * (b = 1 - b);
+ source.vy += y * b;
+ }
+ }
+ }
+
+ function initialize() {
+ if (!nodes) return;
+
+ var i,
+ n = nodes.length,
+ m = links.length,
+ nodeById = new Map(nodes.map((d, i) => [id(d, i, nodes), d])),
+ link;
+
+ for (i = 0, count = new Array(n); i < m; ++i) {
+ link = links[i], link.index = i;
+ if (typeof link.source !== "object") link.source = find(nodeById, link.source);
+ if (typeof link.target !== "object") link.target = find(nodeById, link.target);
+ count[link.source.index] = (count[link.source.index] || 0) + 1;
+ count[link.target.index] = (count[link.target.index] || 0) + 1;
+ }
+
+ for (i = 0, bias = new Array(m); i < m; ++i) {
+ link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
+ }
+
+ strengths = new Array(m), initializeStrength();
+ distances = new Array(m), initializeDistance();
+ }
+
+ function initializeStrength() {
+ if (!nodes) return;
+
+ for (var i = 0, n = links.length; i < n; ++i) {
+ strengths[i] = +strength(links[i], i, links);
+ }
+ }
+
+ function initializeDistance() {
+ if (!nodes) return;
+
+ for (var i = 0, n = links.length; i < n; ++i) {
+ distances[i] = +distance(links[i], i, links);
+ }
+ }
+
+ force.initialize = function(_nodes, _random) {
+ nodes = _nodes;
+ random = _random;
+ initialize();
+ };
+
+ force.links = function(_) {
+ return arguments.length ? (links = _, initialize(), force) : links;
+ };
+
+ force.id = function(_) {
+ return arguments.length ? (id = _, force) : id;
+ };
+
+ force.iterations = function(_) {
+ return arguments.length ? (iterations = +_, force) : iterations;
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initializeStrength(), force) : strength;
+ };
+
+ force.distance = function(_) {
+ return arguments.length ? (distance = typeof _ === "function" ? _ : constant$4(+_), initializeDistance(), force) : distance;
+ };
+
+ return force;
+}
+
+// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use
+const a$2 = 1664525;
+const c$4 = 1013904223;
+const m$1 = 4294967296; // 2^32
+
+function lcg$2() {
+ let s = 1;
+ return () => (s = (a$2 * s + c$4) % m$1) / m$1;
+}
+
+function x$2(d) {
+ return d.x;
+}
+
+function y$2(d) {
+ return d.y;
+}
+
+var initialRadius = 10,
+ initialAngle = Math.PI * (3 - Math.sqrt(5));
+
+function simulation(nodes) {
+ var simulation,
+ alpha = 1,
+ alphaMin = 0.001,
+ alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
+ alphaTarget = 0,
+ velocityDecay = 0.6,
+ forces = new Map(),
+ stepper = timer(step),
+ event = dispatch("tick", "end"),
+ random = lcg$2();
+
+ if (nodes == null) nodes = [];
+
+ function step() {
+ tick();
+ event.call("tick", simulation);
+ if (alpha < alphaMin) {
+ stepper.stop();
+ event.call("end", simulation);
+ }
+ }
+
+ function tick(iterations) {
+ var i, n = nodes.length, node;
+
+ if (iterations === undefined) iterations = 1;
+
+ for (var k = 0; k < iterations; ++k) {
+ alpha += (alphaTarget - alpha) * alphaDecay;
+
+ forces.forEach(function(force) {
+ force(alpha);
+ });
+
+ for (i = 0; i < n; ++i) {
+ node = nodes[i];
+ if (node.fx == null) node.x += node.vx *= velocityDecay;
+ else node.x = node.fx, node.vx = 0;
+ if (node.fy == null) node.y += node.vy *= velocityDecay;
+ else node.y = node.fy, node.vy = 0;
+ }
+ }
+
+ return simulation;
+ }
+
+ function initializeNodes() {
+ for (var i = 0, n = nodes.length, node; i < n; ++i) {
+ node = nodes[i], node.index = i;
+ if (node.fx != null) node.x = node.fx;
+ if (node.fy != null) node.y = node.fy;
+ if (isNaN(node.x) || isNaN(node.y)) {
+ var radius = initialRadius * Math.sqrt(0.5 + i), angle = i * initialAngle;
+ node.x = radius * Math.cos(angle);
+ node.y = radius * Math.sin(angle);
+ }
+ if (isNaN(node.vx) || isNaN(node.vy)) {
+ node.vx = node.vy = 0;
+ }
+ }
+ }
+
+ function initializeForce(force) {
+ if (force.initialize) force.initialize(nodes, random);
+ return force;
+ }
+
+ initializeNodes();
+
+ return simulation = {
+ tick: tick,
+
+ restart: function() {
+ return stepper.restart(step), simulation;
+ },
+
+ stop: function() {
+ return stepper.stop(), simulation;
+ },
+
+ nodes: function(_) {
+ return arguments.length ? (nodes = _, initializeNodes(), forces.forEach(initializeForce), simulation) : nodes;
+ },
+
+ alpha: function(_) {
+ return arguments.length ? (alpha = +_, simulation) : alpha;
+ },
+
+ alphaMin: function(_) {
+ return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
+ },
+
+ alphaDecay: function(_) {
+ return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
+ },
+
+ alphaTarget: function(_) {
+ return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
+ },
+
+ velocityDecay: function(_) {
+ return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
+ },
+
+ randomSource: function(_) {
+ return arguments.length ? (random = _, forces.forEach(initializeForce), simulation) : random;
+ },
+
+ force: function(name, _) {
+ return arguments.length > 1 ? ((_ == null ? forces.delete(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
+ },
+
+ find: function(x, y, radius) {
+ var i = 0,
+ n = nodes.length,
+ dx,
+ dy,
+ d2,
+ node,
+ closest;
+
+ if (radius == null) radius = Infinity;
+ else radius *= radius;
+
+ for (i = 0; i < n; ++i) {
+ node = nodes[i];
+ dx = x - node.x;
+ dy = y - node.y;
+ d2 = dx * dx + dy * dy;
+ if (d2 < radius) closest = node, radius = d2;
+ }
+
+ return closest;
+ },
+
+ on: function(name, _) {
+ return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
+ }
+ };
+}
+
+function manyBody() {
+ var nodes,
+ node,
+ random,
+ alpha,
+ strength = constant$4(-30),
+ strengths,
+ distanceMin2 = 1,
+ distanceMax2 = Infinity,
+ theta2 = 0.81;
+
+ function force(_) {
+ var i, n = nodes.length, tree = quadtree(nodes, x$2, y$2).visitAfter(accumulate);
+ for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
+ }
+
+ function initialize() {
+ if (!nodes) return;
+ var i, n = nodes.length, node;
+ strengths = new Array(n);
+ for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
+ }
+
+ function accumulate(quad) {
+ var strength = 0, q, c, weight = 0, x, y, i;
+
+ // For internal nodes, accumulate forces from child quadrants.
+ if (quad.length) {
+ for (x = y = i = 0; i < 4; ++i) {
+ if ((q = quad[i]) && (c = Math.abs(q.value))) {
+ strength += q.value, weight += c, x += c * q.x, y += c * q.y;
+ }
+ }
+ quad.x = x / weight;
+ quad.y = y / weight;
+ }
+
+ // For leaf nodes, accumulate forces from coincident quadrants.
+ else {
+ q = quad;
+ q.x = q.data.x;
+ q.y = q.data.y;
+ do strength += strengths[q.data.index];
+ while (q = q.next);
+ }
+
+ quad.value = strength;
+ }
+
+ function apply(quad, x1, _, x2) {
+ if (!quad.value) return true;
+
+ var x = quad.x - node.x,
+ y = quad.y - node.y,
+ w = x2 - x1,
+ l = x * x + y * y;
+
+ // Apply the Barnes-Hut approximation if possible.
+ // Limit forces for very close nodes; randomize direction if coincident.
+ if (w * w / theta2 < l) {
+ if (l < distanceMax2) {
+ if (x === 0) x = jiggle(random), l += x * x;
+ if (y === 0) y = jiggle(random), l += y * y;
+ if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+ node.vx += x * quad.value * alpha / l;
+ node.vy += y * quad.value * alpha / l;
+ }
+ return true;
+ }
+
+ // Otherwise, process points directly.
+ else if (quad.length || l >= distanceMax2) return;
+
+ // Limit forces for very close nodes; randomize direction if coincident.
+ if (quad.data !== node || quad.next) {
+ if (x === 0) x = jiggle(random), l += x * x;
+ if (y === 0) y = jiggle(random), l += y * y;
+ if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+ }
+
+ do if (quad.data !== node) {
+ w = strengths[quad.data.index] * alpha / l;
+ node.vx += x * w;
+ node.vy += y * w;
+ } while (quad = quad.next);
+ }
+
+ force.initialize = function(_nodes, _random) {
+ nodes = _nodes;
+ random = _random;
+ initialize();
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+ };
+
+ force.distanceMin = function(_) {
+ return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
+ };
+
+ force.distanceMax = function(_) {
+ return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
+ };
+
+ force.theta = function(_) {
+ return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
+ };
+
+ return force;
+}
+
+function radial$1(radius, x, y) {
+ var nodes,
+ strength = constant$4(0.1),
+ strengths,
+ radiuses;
+
+ if (typeof radius !== "function") radius = constant$4(+radius);
+ if (x == null) x = 0;
+ if (y == null) y = 0;
+
+ function force(alpha) {
+ for (var i = 0, n = nodes.length; i < n; ++i) {
+ var node = nodes[i],
+ dx = node.x - x || 1e-6,
+ dy = node.y - y || 1e-6,
+ r = Math.sqrt(dx * dx + dy * dy),
+ k = (radiuses[i] - r) * strengths[i] * alpha / r;
+ node.vx += dx * k;
+ node.vy += dy * k;
+ }
+ }
+
+ function initialize() {
+ if (!nodes) return;
+ var i, n = nodes.length;
+ strengths = new Array(n);
+ radiuses = new Array(n);
+ for (i = 0; i < n; ++i) {
+ radiuses[i] = +radius(nodes[i], i, nodes);
+ strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);
+ }
+ }
+
+ force.initialize = function(_) {
+ nodes = _, initialize();
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+ };
+
+ force.radius = function(_) {
+ return arguments.length ? (radius = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : radius;
+ };
+
+ force.x = function(_) {
+ return arguments.length ? (x = +_, force) : x;
+ };
+
+ force.y = function(_) {
+ return arguments.length ? (y = +_, force) : y;
+ };
+
+ return force;
+}
+
+function x$1(x) {
+ var strength = constant$4(0.1),
+ nodes,
+ strengths,
+ xz;
+
+ if (typeof x !== "function") x = constant$4(x == null ? 0 : +x);
+
+ function force(alpha) {
+ for (var i = 0, n = nodes.length, node; i < n; ++i) {
+ node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
+ }
+ }
+
+ function initialize() {
+ if (!nodes) return;
+ var i, n = nodes.length;
+ strengths = new Array(n);
+ xz = new Array(n);
+ for (i = 0; i < n; ++i) {
+ strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
+ }
+ }
+
+ force.initialize = function(_) {
+ nodes = _;
+ initialize();
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+ };
+
+ force.x = function(_) {
+ return arguments.length ? (x = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : x;
+ };
+
+ return force;
+}
+
+function y$1(y) {
+ var strength = constant$4(0.1),
+ nodes,
+ strengths,
+ yz;
+
+ if (typeof y !== "function") y = constant$4(y == null ? 0 : +y);
+
+ function force(alpha) {
+ for (var i = 0, n = nodes.length, node; i < n; ++i) {
+ node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
+ }
+ }
+
+ function initialize() {
+ if (!nodes) return;
+ var i, n = nodes.length;
+ strengths = new Array(n);
+ yz = new Array(n);
+ for (i = 0; i < n; ++i) {
+ strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
+ }
+ }
+
+ force.initialize = function(_) {
+ nodes = _;
+ initialize();
+ };
+
+ force.strength = function(_) {
+ return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+ };
+
+ force.y = function(_) {
+ return arguments.length ? (y = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : y;
+ };
+
+ return force;
+}
+
+function formatDecimal(x) {
+ return Math.abs(x = Math.round(x)) >= 1e21
+ ? x.toLocaleString("en").replace(/,/g, "")
+ : x.toString(10);
+}
+
+// Computes the decimal coefficient and exponent of the specified number x with
+// significant digits p, where x is positive and p is in [1, 21] or undefined.
+// For example, formatDecimalParts(1.23) returns ["123", 0].
+function formatDecimalParts(x, p) {
+ if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+ var i, coefficient = x.slice(0, i);
+
+ // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+ // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
+ return [
+ coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
+ +x.slice(i + 1)
+ ];
+}
+
+function exponent(x) {
+ return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+}
+
+function formatGroup(grouping, thousands) {
+ return function(value, width) {
+ var i = value.length,
+ t = [],
+ j = 0,
+ g = grouping[0],
+ length = 0;
+
+ while (i > 0 && g > 0) {
+ if (length + g + 1 > width) g = Math.max(1, width - length);
+ t.push(value.substring(i -= g, i + g));
+ if ((length += g + 1) > width) break;
+ g = grouping[j = (j + 1) % grouping.length];
+ }
+
+ return t.reverse().join(thousands);
+ };
+}
+
+function formatNumerals(numerals) {
+ return function(value) {
+ return value.replace(/[0-9]/g, function(i) {
+ return numerals[+i];
+ });
+ };
+}
+
+// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+
+function formatSpecifier(specifier) {
+ if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+ var match;
+ return new FormatSpecifier({
+ fill: match[1],
+ align: match[2],
+ sign: match[3],
+ symbol: match[4],
+ zero: match[5],
+ width: match[6],
+ comma: match[7],
+ precision: match[8] && match[8].slice(1),
+ trim: match[9],
+ type: match[10]
+ });
+}
+
+formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+
+function FormatSpecifier(specifier) {
+ this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+ this.align = specifier.align === undefined ? ">" : specifier.align + "";
+ this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+ this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+ this.zero = !!specifier.zero;
+ this.width = specifier.width === undefined ? undefined : +specifier.width;
+ this.comma = !!specifier.comma;
+ this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+ this.trim = !!specifier.trim;
+ this.type = specifier.type === undefined ? "" : specifier.type + "";
+}
+
+FormatSpecifier.prototype.toString = function() {
+ return this.fill
+ + this.align
+ + this.sign
+ + this.symbol
+ + (this.zero ? "0" : "")
+ + (this.width === undefined ? "" : Math.max(1, this.width | 0))
+ + (this.comma ? "," : "")
+ + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
+ + (this.trim ? "~" : "")
+ + this.type;
+};
+
+// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+function formatTrim(s) {
+ out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+ switch (s[i]) {
+ case ".": i0 = i1 = i; break;
+ case "0": if (i0 === 0) i0 = i; i1 = i; break;
+ default: if (!+s[i]) break out; if (i0 > 0) i0 = 0; break;
+ }
+ }
+ return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+}
+
+var prefixExponent;
+
+function formatPrefixAuto(x, p) {
+ var d = formatDecimalParts(x, p);
+ if (!d) return x + "";
+ var coefficient = d[0],
+ exponent = d[1],
+ i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+ n = coefficient.length;
+ return i === n ? coefficient
+ : i > n ? coefficient + new Array(i - n + 1).join("0")
+ : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
+ : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+}
+
+function formatRounded(x, p) {
+ var d = formatDecimalParts(x, p);
+ if (!d) return x + "";
+ var coefficient = d[0],
+ exponent = d[1];
+ return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
+ : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
+ : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+}
+
+var formatTypes = {
+ "%": (x, p) => (x * 100).toFixed(p),
+ "b": (x) => Math.round(x).toString(2),
+ "c": (x) => x + "",
+ "d": formatDecimal,
+ "e": (x, p) => x.toExponential(p),
+ "f": (x, p) => x.toFixed(p),
+ "g": (x, p) => x.toPrecision(p),
+ "o": (x) => Math.round(x).toString(8),
+ "p": (x, p) => formatRounded(x * 100, p),
+ "r": formatRounded,
+ "s": formatPrefixAuto,
+ "X": (x) => Math.round(x).toString(16).toUpperCase(),
+ "x": (x) => Math.round(x).toString(16)
+};
+
+function identity$6(x) {
+ return x;
+}
+
+var map = Array.prototype.map,
+ prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
+
+function formatLocale$1(locale) {
+ var group = locale.grouping === undefined || locale.thousands === undefined ? identity$6 : formatGroup(map.call(locale.grouping, Number), locale.thousands + ""),
+ currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+ currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+ decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+ numerals = locale.numerals === undefined ? identity$6 : formatNumerals(map.call(locale.numerals, String)),
+ percent = locale.percent === undefined ? "%" : locale.percent + "",
+ minus = locale.minus === undefined ? "−" : locale.minus + "",
+ nan = locale.nan === undefined ? "NaN" : locale.nan + "";
+
+ function newFormat(specifier) {
+ specifier = formatSpecifier(specifier);
+
+ var fill = specifier.fill,
+ align = specifier.align,
+ sign = specifier.sign,
+ symbol = specifier.symbol,
+ zero = specifier.zero,
+ width = specifier.width,
+ comma = specifier.comma,
+ precision = specifier.precision,
+ trim = specifier.trim,
+ type = specifier.type;
+
+ // The "n" type is an alias for ",g".
+ if (type === "n") comma = true, type = "g";
+
+ // The "" type, and any invalid type, is an alias for ".12~g".
+ else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g";
+
+ // If zero fill is specified, padding goes after sign and before digits.
+ if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
+
+ // Compute the prefix and suffix.
+ // For SI-prefix, the suffix is lazily computed.
+ var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+ suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
+
+ // What format function should we use?
+ // Is this an integer type?
+ // Can this type generate exponential notation?
+ var formatType = formatTypes[type],
+ maybeSuffix = /[defgprs%]/.test(type);
+
+ // Set the default precision if not specified,
+ // or clamp the specified precision to the supported range.
+ // For significant precision, it must be in [1, 21].
+ // For fixed precision, it must be in [0, 20].
+ precision = precision === undefined ? 6
+ : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
+ : Math.max(0, Math.min(20, precision));
+
+ function format(value) {
+ var valuePrefix = prefix,
+ valueSuffix = suffix,
+ i, n, c;
+
+ if (type === "c") {
+ valueSuffix = formatType(value) + valueSuffix;
+ value = "";
+ } else {
+ value = +value;
+
+ // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+ var valueNegative = value < 0 || 1 / value < 0;
+
+ // Perform the initial formatting.
+ value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
+
+ // Trim insignificant zeros.
+ if (trim) value = formatTrim(value);
+
+ // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+ if (valueNegative && +value === 0 && sign !== "+") valueNegative = false;
+
+ // Compute the prefix and suffix.
+ valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+ valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
+
+ // Break the formatted value into the integer “value” part that can be
+ // grouped, and fractional or exponential “suffix” part that is not.
+ if (maybeSuffix) {
+ i = -1, n = value.length;
+ while (++i < n) {
+ if (c = value.charCodeAt(i), 48 > c || c > 57) {
+ valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+ value = value.slice(0, i);
+ break;
+ }
+ }
+ }
+ }
+
+ // If the fill character is not "0", grouping is applied before padding.
+ if (comma && !zero) value = group(value, Infinity);
+
+ // Compute the padding.
+ var length = valuePrefix.length + value.length + valueSuffix.length,
+ padding = length < width ? new Array(width - length + 1).join(fill) : "";
+
+ // If the fill character is "0", grouping is applied after padding.
+ if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";
+
+ // Reconstruct the final output based on the desired alignment.
+ switch (align) {
+ case "<": value = valuePrefix + value + valueSuffix + padding; break;
+ case "=": value = valuePrefix + padding + value + valueSuffix; break;
+ case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
+ default: value = padding + valuePrefix + value + valueSuffix; break;
+ }
+
+ return numerals(value);
+ }
+
+ format.toString = function() {
+ return specifier + "";
+ };
+
+ return format;
+ }
+
+ function formatPrefix(specifier, value) {
+ var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+ e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+ k = Math.pow(10, -e),
+ prefix = prefixes[8 + e / 3];
+ return function(value) {
+ return f(k * value) + prefix;
+ };
+ }
+
+ return {
+ format: newFormat,
+ formatPrefix: formatPrefix
+ };
+}
+
+var locale$1;
+exports.format = void 0;
+exports.formatPrefix = void 0;
+
+defaultLocale$1({
+ thousands: ",",
+ grouping: [3],
+ currency: ["$", ""]
+});
+
+function defaultLocale$1(definition) {
+ locale$1 = formatLocale$1(definition);
+ exports.format = locale$1.format;
+ exports.formatPrefix = locale$1.formatPrefix;
+ return locale$1;
+}
+
+function precisionFixed(step) {
+ return Math.max(0, -exponent(Math.abs(step)));
+}
+
+function precisionPrefix(step, value) {
+ return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+}
+
+function precisionRound(step, max) {
+ step = Math.abs(step), max = Math.abs(max) - step;
+ return Math.max(0, exponent(max) - exponent(step)) + 1;
+}
+
+var epsilon$1 = 1e-6;
+var epsilon2 = 1e-12;
+var pi$1 = Math.PI;
+var halfPi$1 = pi$1 / 2;
+var quarterPi = pi$1 / 4;
+var tau$1 = pi$1 * 2;
+
+var degrees = 180 / pi$1;
+var radians = pi$1 / 180;
+
+var abs$1 = Math.abs;
+var atan = Math.atan;
+var atan2$1 = Math.atan2;
+var cos$1 = Math.cos;
+var ceil = Math.ceil;
+var exp = Math.exp;
+var hypot = Math.hypot;
+var log$1 = Math.log;
+var pow$1 = Math.pow;
+var sin$1 = Math.sin;
+var sign$1 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
+var sqrt$2 = Math.sqrt;
+var tan = Math.tan;
+
+function acos$1(x) {
+ return x > 1 ? 0 : x < -1 ? pi$1 : Math.acos(x);
+}
+
+function asin$1(x) {
+ return x > 1 ? halfPi$1 : x < -1 ? -halfPi$1 : Math.asin(x);
+}
+
+function haversin(x) {
+ return (x = sin$1(x / 2)) * x;
+}
+
+function noop$1() {}
+
+function streamGeometry(geometry, stream) {
+ if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+ streamGeometryType[geometry.type](geometry, stream);
+ }
+}
+
+var streamObjectType = {
+ Feature: function(object, stream) {
+ streamGeometry(object.geometry, stream);
+ },
+ FeatureCollection: function(object, stream) {
+ var features = object.features, i = -1, n = features.length;
+ while (++i < n) streamGeometry(features[i].geometry, stream);
+ }
+};
+
+var streamGeometryType = {
+ Sphere: function(object, stream) {
+ stream.sphere();
+ },
+ Point: function(object, stream) {
+ object = object.coordinates;
+ stream.point(object[0], object[1], object[2]);
+ },
+ MultiPoint: function(object, stream) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
+ },
+ LineString: function(object, stream) {
+ streamLine(object.coordinates, stream, 0);
+ },
+ MultiLineString: function(object, stream) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) streamLine(coordinates[i], stream, 0);
+ },
+ Polygon: function(object, stream) {
+ streamPolygon(object.coordinates, stream);
+ },
+ MultiPolygon: function(object, stream) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) streamPolygon(coordinates[i], stream);
+ },
+ GeometryCollection: function(object, stream) {
+ var geometries = object.geometries, i = -1, n = geometries.length;
+ while (++i < n) streamGeometry(geometries[i], stream);
+ }
+};
+
+function streamLine(coordinates, stream, closed) {
+ var i = -1, n = coordinates.length - closed, coordinate;
+ stream.lineStart();
+ while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+ stream.lineEnd();
+}
+
+function streamPolygon(coordinates, stream) {
+ var i = -1, n = coordinates.length;
+ stream.polygonStart();
+ while (++i < n) streamLine(coordinates[i], stream, 1);
+ stream.polygonEnd();
+}
+
+function geoStream(object, stream) {
+ if (object && streamObjectType.hasOwnProperty(object.type)) {
+ streamObjectType[object.type](object, stream);
+ } else {
+ streamGeometry(object, stream);
+ }
+}
+
+var areaRingSum$1 = new Adder();
+
+// hello?
+
+var areaSum$1 = new Adder(),
+ lambda00$2,
+ phi00$2,
+ lambda0$2,
+ cosPhi0$1,
+ sinPhi0$1;
+
+var areaStream$1 = {
+ point: noop$1,
+ lineStart: noop$1,
+ lineEnd: noop$1,
+ polygonStart: function() {
+ areaRingSum$1 = new Adder();
+ areaStream$1.lineStart = areaRingStart$1;
+ areaStream$1.lineEnd = areaRingEnd$1;
+ },
+ polygonEnd: function() {
+ var areaRing = +areaRingSum$1;
+ areaSum$1.add(areaRing < 0 ? tau$1 + areaRing : areaRing);
+ this.lineStart = this.lineEnd = this.point = noop$1;
+ },
+ sphere: function() {
+ areaSum$1.add(tau$1);
+ }
+};
+
+function areaRingStart$1() {
+ areaStream$1.point = areaPointFirst$1;
+}
+
+function areaRingEnd$1() {
+ areaPoint$1(lambda00$2, phi00$2);
+}
+
+function areaPointFirst$1(lambda, phi) {
+ areaStream$1.point = areaPoint$1;
+ lambda00$2 = lambda, phi00$2 = phi;
+ lambda *= radians, phi *= radians;
+ lambda0$2 = lambda, cosPhi0$1 = cos$1(phi = phi / 2 + quarterPi), sinPhi0$1 = sin$1(phi);
+}
+
+function areaPoint$1(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ phi = phi / 2 + quarterPi; // half the angular distance from south pole
+
+ // Spherical excess E for a spherical triangle with vertices: south pole,
+ // previous point, current point. Uses a formula derived from Cagnoli’s
+ // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
+ var dLambda = lambda - lambda0$2,
+ sdLambda = dLambda >= 0 ? 1 : -1,
+ adLambda = sdLambda * dLambda,
+ cosPhi = cos$1(phi),
+ sinPhi = sin$1(phi),
+ k = sinPhi0$1 * sinPhi,
+ u = cosPhi0$1 * cosPhi + k * cos$1(adLambda),
+ v = k * sdLambda * sin$1(adLambda);
+ areaRingSum$1.add(atan2$1(v, u));
+
+ // Advance the previous points.
+ lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
+}
+
+function area$2(object) {
+ areaSum$1 = new Adder();
+ geoStream(object, areaStream$1);
+ return areaSum$1 * 2;
+}
+
+function spherical(cartesian) {
+ return [atan2$1(cartesian[1], cartesian[0]), asin$1(cartesian[2])];
+}
+
+function cartesian(spherical) {
+ var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);
+ return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];
+}
+
+function cartesianDot(a, b) {
+ return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+}
+
+function cartesianCross(a, b) {
+ return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+}
+
+// TODO return a
+function cartesianAddInPlace(a, b) {
+ a[0] += b[0], a[1] += b[1], a[2] += b[2];
+}
+
+function cartesianScale(vector, k) {
+ return [vector[0] * k, vector[1] * k, vector[2] * k];
+}
+
+// TODO return d
+function cartesianNormalizeInPlace(d) {
+ var l = sqrt$2(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+ d[0] /= l, d[1] /= l, d[2] /= l;
+}
+
+var lambda0$1, phi0, lambda1, phi1, // bounds
+ lambda2, // previous lambda-coordinate
+ lambda00$1, phi00$1, // first point
+ p0, // previous 3D point
+ deltaSum,
+ ranges,
+ range;
+
+var boundsStream$2 = {
+ point: boundsPoint$1,
+ lineStart: boundsLineStart,
+ lineEnd: boundsLineEnd,
+ polygonStart: function() {
+ boundsStream$2.point = boundsRingPoint;
+ boundsStream$2.lineStart = boundsRingStart;
+ boundsStream$2.lineEnd = boundsRingEnd;
+ deltaSum = new Adder();
+ areaStream$1.polygonStart();
+ },
+ polygonEnd: function() {
+ areaStream$1.polygonEnd();
+ boundsStream$2.point = boundsPoint$1;
+ boundsStream$2.lineStart = boundsLineStart;
+ boundsStream$2.lineEnd = boundsLineEnd;
+ if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+ else if (deltaSum > epsilon$1) phi1 = 90;
+ else if (deltaSum < -epsilon$1) phi0 = -90;
+ range[0] = lambda0$1, range[1] = lambda1;
+ },
+ sphere: function() {
+ lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+ }
+};
+
+function boundsPoint$1(lambda, phi) {
+ ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+ if (phi < phi0) phi0 = phi;
+ if (phi > phi1) phi1 = phi;
+}
+
+function linePoint(lambda, phi) {
+ var p = cartesian([lambda * radians, phi * radians]);
+ if (p0) {
+ var normal = cartesianCross(p0, p),
+ equatorial = [normal[1], -normal[0], 0],
+ inflection = cartesianCross(equatorial, normal);
+ cartesianNormalizeInPlace(inflection);
+ inflection = spherical(inflection);
+ var delta = lambda - lambda2,
+ sign = delta > 0 ? 1 : -1,
+ lambdai = inflection[0] * degrees * sign,
+ phii,
+ antimeridian = abs$1(delta) > 180;
+ if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+ phii = inflection[1] * degrees;
+ if (phii > phi1) phi1 = phii;
+ } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+ phii = -inflection[1] * degrees;
+ if (phii < phi0) phi0 = phii;
+ } else {
+ if (phi < phi0) phi0 = phi;
+ if (phi > phi1) phi1 = phi;
+ }
+ if (antimeridian) {
+ if (lambda < lambda2) {
+ if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+ } else {
+ if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+ }
+ } else {
+ if (lambda1 >= lambda0$1) {
+ if (lambda < lambda0$1) lambda0$1 = lambda;
+ if (lambda > lambda1) lambda1 = lambda;
+ } else {
+ if (lambda > lambda2) {
+ if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+ } else {
+ if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+ }
+ }
+ }
+ } else {
+ ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+ }
+ if (phi < phi0) phi0 = phi;
+ if (phi > phi1) phi1 = phi;
+ p0 = p, lambda2 = lambda;
+}
+
+function boundsLineStart() {
+ boundsStream$2.point = linePoint;
+}
+
+function boundsLineEnd() {
+ range[0] = lambda0$1, range[1] = lambda1;
+ boundsStream$2.point = boundsPoint$1;
+ p0 = null;
+}
+
+function boundsRingPoint(lambda, phi) {
+ if (p0) {
+ var delta = lambda - lambda2;
+ deltaSum.add(abs$1(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+ } else {
+ lambda00$1 = lambda, phi00$1 = phi;
+ }
+ areaStream$1.point(lambda, phi);
+ linePoint(lambda, phi);
+}
+
+function boundsRingStart() {
+ areaStream$1.lineStart();
+}
+
+function boundsRingEnd() {
+ boundsRingPoint(lambda00$1, phi00$1);
+ areaStream$1.lineEnd();
+ if (abs$1(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
+ range[0] = lambda0$1, range[1] = lambda1;
+ p0 = null;
+}
+
+// Finds the left-right distance between two longitudes.
+// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+// the distance between ±180° to be 360°.
+function angle(lambda0, lambda1) {
+ return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+}
+
+function rangeCompare(a, b) {
+ return a[0] - b[0];
+}
+
+function rangeContains(range, x) {
+ return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
+}
+
+function bounds(feature) {
+ var i, n, a, b, merged, deltaMax, delta;
+
+ phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+ ranges = [];
+ geoStream(feature, boundsStream$2);
+
+ // First, sort ranges by their minimum longitudes.
+ if (n = ranges.length) {
+ ranges.sort(rangeCompare);
+
+ // Then, merge any ranges that overlap.
+ for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+ b = ranges[i];
+ if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+ if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+ if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+ } else {
+ merged.push(a = b);
+ }
+ }
+
+ // Finally, find the largest gap between the merged ranges.
+ // The final bounding box will be the inverse of this gap.
+ for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+ b = merged[i];
+ if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
+ }
+ }
+
+ ranges = range = null;
+
+ return lambda0$1 === Infinity || phi0 === Infinity
+ ? [[NaN, NaN], [NaN, NaN]]
+ : [[lambda0$1, phi0], [lambda1, phi1]];
+}
+
+var W0, W1,
+ X0$1, Y0$1, Z0$1,
+ X1$1, Y1$1, Z1$1,
+ X2$1, Y2$1, Z2$1,
+ lambda00, phi00, // first point
+ x0$4, y0$4, z0; // previous point
+
+var centroidStream$1 = {
+ sphere: noop$1,
+ point: centroidPoint$1,
+ lineStart: centroidLineStart$1,
+ lineEnd: centroidLineEnd$1,
+ polygonStart: function() {
+ centroidStream$1.lineStart = centroidRingStart$1;
+ centroidStream$1.lineEnd = centroidRingEnd$1;
+ },
+ polygonEnd: function() {
+ centroidStream$1.lineStart = centroidLineStart$1;
+ centroidStream$1.lineEnd = centroidLineEnd$1;
+ }
+};
+
+// Arithmetic mean of Cartesian vectors.
+function centroidPoint$1(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ var cosPhi = cos$1(phi);
+ centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));
+}
+
+function centroidPointCartesian(x, y, z) {
+ ++W0;
+ X0$1 += (x - X0$1) / W0;
+ Y0$1 += (y - Y0$1) / W0;
+ Z0$1 += (z - Z0$1) / W0;
+}
+
+function centroidLineStart$1() {
+ centroidStream$1.point = centroidLinePointFirst;
+}
+
+function centroidLinePointFirst(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ var cosPhi = cos$1(phi);
+ x0$4 = cosPhi * cos$1(lambda);
+ y0$4 = cosPhi * sin$1(lambda);
+ z0 = sin$1(phi);
+ centroidStream$1.point = centroidLinePoint;
+ centroidPointCartesian(x0$4, y0$4, z0);
+}
+
+function centroidLinePoint(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ var cosPhi = cos$1(phi),
+ x = cosPhi * cos$1(lambda),
+ y = cosPhi * sin$1(lambda),
+ z = sin$1(phi),
+ w = atan2$1(sqrt$2((w = y0$4 * z - z0 * y) * w + (w = z0 * x - x0$4 * z) * w + (w = x0$4 * y - y0$4 * x) * w), x0$4 * x + y0$4 * y + z0 * z);
+ W1 += w;
+ X1$1 += w * (x0$4 + (x0$4 = x));
+ Y1$1 += w * (y0$4 + (y0$4 = y));
+ Z1$1 += w * (z0 + (z0 = z));
+ centroidPointCartesian(x0$4, y0$4, z0);
+}
+
+function centroidLineEnd$1() {
+ centroidStream$1.point = centroidPoint$1;
+}
+
+// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
+// J. Applied Mechanics 42, 239 (1975).
+function centroidRingStart$1() {
+ centroidStream$1.point = centroidRingPointFirst;
+}
+
+function centroidRingEnd$1() {
+ centroidRingPoint(lambda00, phi00);
+ centroidStream$1.point = centroidPoint$1;
+}
+
+function centroidRingPointFirst(lambda, phi) {
+ lambda00 = lambda, phi00 = phi;
+ lambda *= radians, phi *= radians;
+ centroidStream$1.point = centroidRingPoint;
+ var cosPhi = cos$1(phi);
+ x0$4 = cosPhi * cos$1(lambda);
+ y0$4 = cosPhi * sin$1(lambda);
+ z0 = sin$1(phi);
+ centroidPointCartesian(x0$4, y0$4, z0);
+}
+
+function centroidRingPoint(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ var cosPhi = cos$1(phi),
+ x = cosPhi * cos$1(lambda),
+ y = cosPhi * sin$1(lambda),
+ z = sin$1(phi),
+ cx = y0$4 * z - z0 * y,
+ cy = z0 * x - x0$4 * z,
+ cz = x0$4 * y - y0$4 * x,
+ m = hypot(cx, cy, cz),
+ w = asin$1(m), // line weight = angle
+ v = m && -w / m; // area weight multiplier
+ X2$1.add(v * cx);
+ Y2$1.add(v * cy);
+ Z2$1.add(v * cz);
+ W1 += w;
+ X1$1 += w * (x0$4 + (x0$4 = x));
+ Y1$1 += w * (y0$4 + (y0$4 = y));
+ Z1$1 += w * (z0 + (z0 = z));
+ centroidPointCartesian(x0$4, y0$4, z0);
+}
+
+function centroid$1(object) {
+ W0 = W1 =
+ X0$1 = Y0$1 = Z0$1 =
+ X1$1 = Y1$1 = Z1$1 = 0;
+ X2$1 = new Adder();
+ Y2$1 = new Adder();
+ Z2$1 = new Adder();
+ geoStream(object, centroidStream$1);
+
+ var x = +X2$1,
+ y = +Y2$1,
+ z = +Z2$1,
+ m = hypot(x, y, z);
+
+ // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
+ if (m < epsilon2) {
+ x = X1$1, y = Y1$1, z = Z1$1;
+ // If the feature has zero length, fall back to arithmetic mean of point vectors.
+ if (W1 < epsilon$1) x = X0$1, y = Y0$1, z = Z0$1;
+ m = hypot(x, y, z);
+ // If the feature still has an undefined ccentroid, then return.
+ if (m < epsilon2) return [NaN, NaN];
+ }
+
+ return [atan2$1(y, x) * degrees, asin$1(z / m) * degrees];
+}
+
+function constant$3(x) {
+ return function() {
+ return x;
+ };
+}
+
+function compose(a, b) {
+
+ function compose(x, y) {
+ return x = a(x, y), b(x[0], x[1]);
+ }
+
+ if (a.invert && b.invert) compose.invert = function(x, y) {
+ return x = b.invert(x, y), x && a.invert(x[0], x[1]);
+ };
+
+ return compose;
+}
+
+function rotationIdentity(lambda, phi) {
+ if (abs$1(lambda) > pi$1) lambda -= Math.round(lambda / tau$1) * tau$1;
+ return [lambda, phi];
+}
+
+rotationIdentity.invert = rotationIdentity;
+
+function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+ return (deltaLambda %= tau$1) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
+ : rotationLambda(deltaLambda))
+ : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
+ : rotationIdentity);
+}
+
+function forwardRotationLambda(deltaLambda) {
+ return function(lambda, phi) {
+ lambda += deltaLambda;
+ if (abs$1(lambda) > pi$1) lambda -= Math.round(lambda / tau$1) * tau$1;
+ return [lambda, phi];
+ };
+}
+
+function rotationLambda(deltaLambda) {
+ var rotation = forwardRotationLambda(deltaLambda);
+ rotation.invert = forwardRotationLambda(-deltaLambda);
+ return rotation;
+}
+
+function rotationPhiGamma(deltaPhi, deltaGamma) {
+ var cosDeltaPhi = cos$1(deltaPhi),
+ sinDeltaPhi = sin$1(deltaPhi),
+ cosDeltaGamma = cos$1(deltaGamma),
+ sinDeltaGamma = sin$1(deltaGamma);
+
+ function rotation(lambda, phi) {
+ var cosPhi = cos$1(phi),
+ x = cos$1(lambda) * cosPhi,
+ y = sin$1(lambda) * cosPhi,
+ z = sin$1(phi),
+ k = z * cosDeltaPhi + x * sinDeltaPhi;
+ return [
+ atan2$1(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
+ asin$1(k * cosDeltaGamma + y * sinDeltaGamma)
+ ];
+ }
+
+ rotation.invert = function(lambda, phi) {
+ var cosPhi = cos$1(phi),
+ x = cos$1(lambda) * cosPhi,
+ y = sin$1(lambda) * cosPhi,
+ z = sin$1(phi),
+ k = z * cosDeltaGamma - y * sinDeltaGamma;
+ return [
+ atan2$1(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
+ asin$1(k * cosDeltaPhi - x * sinDeltaPhi)
+ ];
+ };
+
+ return rotation;
+}
+
+function rotation(rotate) {
+ rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
+
+ function forward(coordinates) {
+ coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+ return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+ }
+
+ forward.invert = function(coordinates) {
+ coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+ return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+ };
+
+ return forward;
+}
+
+// Generates a circle centered at [0°, 0°], with a given radius and precision.
+function circleStream(stream, radius, delta, direction, t0, t1) {
+ if (!delta) return;
+ var cosRadius = cos$1(radius),
+ sinRadius = sin$1(radius),
+ step = direction * delta;
+ if (t0 == null) {
+ t0 = radius + direction * tau$1;
+ t1 = radius - step / 2;
+ } else {
+ t0 = circleRadius(cosRadius, t0);
+ t1 = circleRadius(cosRadius, t1);
+ if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$1;
+ }
+ for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+ point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
+ stream.point(point[0], point[1]);
+ }
+}
+
+// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
+function circleRadius(cosRadius, point) {
+ point = cartesian(point), point[0] -= cosRadius;
+ cartesianNormalizeInPlace(point);
+ var radius = acos$1(-point[1]);
+ return ((-point[2] < 0 ? -radius : radius) + tau$1 - epsilon$1) % tau$1;
+}
+
+function circle$1() {
+ var center = constant$3([0, 0]),
+ radius = constant$3(90),
+ precision = constant$3(2),
+ ring,
+ rotate,
+ stream = {point: point};
+
+ function point(x, y) {
+ ring.push(x = rotate(x, y));
+ x[0] *= degrees, x[1] *= degrees;
+ }
+
+ function circle() {
+ var c = center.apply(this, arguments),
+ r = radius.apply(this, arguments) * radians,
+ p = precision.apply(this, arguments) * radians;
+ ring = [];
+ rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
+ circleStream(stream, r, p, 1);
+ c = {type: "Polygon", coordinates: [ring]};
+ ring = rotate = null;
+ return c;
+ }
+
+ circle.center = function(_) {
+ return arguments.length ? (center = typeof _ === "function" ? _ : constant$3([+_[0], +_[1]]), circle) : center;
+ };
+
+ circle.radius = function(_) {
+ return arguments.length ? (radius = typeof _ === "function" ? _ : constant$3(+_), circle) : radius;
+ };
+
+ circle.precision = function(_) {
+ return arguments.length ? (precision = typeof _ === "function" ? _ : constant$3(+_), circle) : precision;
+ };
+
+ return circle;
+}
+
+function clipBuffer() {
+ var lines = [],
+ line;
+ return {
+ point: function(x, y, m) {
+ line.push([x, y, m]);
+ },
+ lineStart: function() {
+ lines.push(line = []);
+ },
+ lineEnd: noop$1,
+ rejoin: function() {
+ if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+ },
+ result: function() {
+ var result = lines;
+ lines = [];
+ line = null;
+ return result;
+ }
+ };
+}
+
+function pointEqual(a, b) {
+ return abs$1(a[0] - b[0]) < epsilon$1 && abs$1(a[1] - b[1]) < epsilon$1;
+}
+
+function Intersection(point, points, other, entry) {
+ this.x = point;
+ this.z = points;
+ this.o = other; // another intersection
+ this.e = entry; // is an entry?
+ this.v = false; // visited
+ this.n = this.p = null; // next & previous
+}
+
+// A generalized polygon clipping algorithm: given a polygon that has been cut
+// into its visible line segments, and rejoins the segments by interpolating
+// along the clip edge.
+function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
+ var subject = [],
+ clip = [],
+ i,
+ n;
+
+ segments.forEach(function(segment) {
+ if ((n = segment.length - 1) <= 0) return;
+ var n, p0 = segment[0], p1 = segment[n], x;
+
+ if (pointEqual(p0, p1)) {
+ if (!p0[2] && !p1[2]) {
+ stream.lineStart();
+ for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
+ stream.lineEnd();
+ return;
+ }
+ // handle degenerate cases by moving the point
+ p1[0] += 2 * epsilon$1;
+ }
+
+ subject.push(x = new Intersection(p0, segment, null, true));
+ clip.push(x.o = new Intersection(p0, null, x, false));
+ subject.push(x = new Intersection(p1, segment, null, false));
+ clip.push(x.o = new Intersection(p1, null, x, true));
+ });
+
+ if (!subject.length) return;
+
+ clip.sort(compareIntersection);
+ link$1(subject);
+ link$1(clip);
+
+ for (i = 0, n = clip.length; i < n; ++i) {
+ clip[i].e = startInside = !startInside;
+ }
+
+ var start = subject[0],
+ points,
+ point;
+
+ while (1) {
+ // Find first unvisited intersection.
+ var current = start,
+ isSubject = true;
+ while (current.v) if ((current = current.n) === start) return;
+ points = current.z;
+ stream.lineStart();
+ do {
+ current.v = current.o.v = true;
+ if (current.e) {
+ if (isSubject) {
+ for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
+ } else {
+ interpolate(current.x, current.n.x, 1, stream);
+ }
+ current = current.n;
+ } else {
+ if (isSubject) {
+ points = current.p.z;
+ for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
+ } else {
+ interpolate(current.x, current.p.x, -1, stream);
+ }
+ current = current.p;
+ }
+ current = current.o;
+ points = current.z;
+ isSubject = !isSubject;
+ } while (!current.v);
+ stream.lineEnd();
+ }
+}
+
+function link$1(array) {
+ if (!(n = array.length)) return;
+ var n,
+ i = 0,
+ a = array[0],
+ b;
+ while (++i < n) {
+ a.n = b = array[i];
+ b.p = a;
+ a = b;
+ }
+ a.n = b = array[0];
+ b.p = a;
+}
+
+function longitude(point) {
+ return abs$1(point[0]) <= pi$1 ? point[0] : sign$1(point[0]) * ((abs$1(point[0]) + pi$1) % tau$1 - pi$1);
+}
+
+function polygonContains(polygon, point) {
+ var lambda = longitude(point),
+ phi = point[1],
+ sinPhi = sin$1(phi),
+ normal = [sin$1(lambda), -cos$1(lambda), 0],
+ angle = 0,
+ winding = 0;
+
+ var sum = new Adder();
+
+ if (sinPhi === 1) phi = halfPi$1 + epsilon$1;
+ else if (sinPhi === -1) phi = -halfPi$1 - epsilon$1;
+
+ for (var i = 0, n = polygon.length; i < n; ++i) {
+ if (!(m = (ring = polygon[i]).length)) continue;
+ var ring,
+ m,
+ point0 = ring[m - 1],
+ lambda0 = longitude(point0),
+ phi0 = point0[1] / 2 + quarterPi,
+ sinPhi0 = sin$1(phi0),
+ cosPhi0 = cos$1(phi0);
+
+ for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+ var point1 = ring[j],
+ lambda1 = longitude(point1),
+ phi1 = point1[1] / 2 + quarterPi,
+ sinPhi1 = sin$1(phi1),
+ cosPhi1 = cos$1(phi1),
+ delta = lambda1 - lambda0,
+ sign = delta >= 0 ? 1 : -1,
+ absDelta = sign * delta,
+ antimeridian = absDelta > pi$1,
+ k = sinPhi0 * sinPhi1;
+
+ sum.add(atan2$1(k * sign * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
+ angle += antimeridian ? delta + sign * tau$1 : delta;
+
+ // Are the longitudes either side of the point’s meridian (lambda),
+ // and are the latitudes smaller than the parallel (phi)?
+ if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+ var arc = cartesianCross(cartesian(point0), cartesian(point1));
+ cartesianNormalizeInPlace(arc);
+ var intersection = cartesianCross(normal, arc);
+ cartesianNormalizeInPlace(intersection);
+ var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin$1(intersection[2]);
+ if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+ winding += antimeridian ^ delta >= 0 ? 1 : -1;
+ }
+ }
+ }
+ }
+
+ // First, determine whether the South pole is inside or outside:
+ //
+ // It is inside if:
+ // * the polygon winds around it in a clockwise direction.
+ // * the polygon does not (cumulatively) wind around it, but has a negative
+ // (counter-clockwise) area.
+ //
+ // Second, count the (signed) number of times a segment crosses a lambda
+ // from the point to the South pole. If it is zero, then the point is the
+ // same side as the South pole.
+
+ return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2) ^ (winding & 1);
+}
+
+function clip(pointVisible, clipLine, interpolate, start) {
+ return function(sink) {
+ var line = clipLine(sink),
+ ringBuffer = clipBuffer(),
+ ringSink = clipLine(ringBuffer),
+ polygonStarted = false,
+ polygon,
+ segments,
+ ring;
+
+ var clip = {
+ point: point,
+ lineStart: lineStart,
+ lineEnd: lineEnd,
+ polygonStart: function() {
+ clip.point = pointRing;
+ clip.lineStart = ringStart;
+ clip.lineEnd = ringEnd;
+ segments = [];
+ polygon = [];
+ },
+ polygonEnd: function() {
+ clip.point = point;
+ clip.lineStart = lineStart;
+ clip.lineEnd = lineEnd;
+ segments = merge(segments);
+ var startInside = polygonContains(polygon, start);
+ if (segments.length) {
+ if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+ clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+ } else if (startInside) {
+ if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+ sink.lineStart();
+ interpolate(null, null, 1, sink);
+ sink.lineEnd();
+ }
+ if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+ segments = polygon = null;
+ },
+ sphere: function() {
+ sink.polygonStart();
+ sink.lineStart();
+ interpolate(null, null, 1, sink);
+ sink.lineEnd();
+ sink.polygonEnd();
+ }
+ };
+
+ function point(lambda, phi) {
+ if (pointVisible(lambda, phi)) sink.point(lambda, phi);
+ }
+
+ function pointLine(lambda, phi) {
+ line.point(lambda, phi);
+ }
+
+ function lineStart() {
+ clip.point = pointLine;
+ line.lineStart();
+ }
+
+ function lineEnd() {
+ clip.point = point;
+ line.lineEnd();
+ }
+
+ function pointRing(lambda, phi) {
+ ring.push([lambda, phi]);
+ ringSink.point(lambda, phi);
+ }
+
+ function ringStart() {
+ ringSink.lineStart();
+ ring = [];
+ }
+
+ function ringEnd() {
+ pointRing(ring[0][0], ring[0][1]);
+ ringSink.lineEnd();
+
+ var clean = ringSink.clean(),
+ ringSegments = ringBuffer.result(),
+ i, n = ringSegments.length, m,
+ segment,
+ point;
+
+ ring.pop();
+ polygon.push(ring);
+ ring = null;
+
+ if (!n) return;
+
+ // No intersections.
+ if (clean & 1) {
+ segment = ringSegments[0];
+ if ((m = segment.length - 1) > 0) {
+ if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+ sink.lineStart();
+ for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
+ sink.lineEnd();
+ }
+ return;
+ }
+
+ // Rejoin connected segments.
+ // TODO reuse ringBuffer.rejoin()?
+ if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+
+ segments.push(ringSegments.filter(validSegment));
+ }
+
+ return clip;
+ };
+}
+
+function validSegment(segment) {
+ return segment.length > 1;
+}
+
+// Intersections are sorted along the clip edge. For both antimeridian cutting
+// and circle clipping, the same comparison is used.
+function compareIntersection(a, b) {
+ return ((a = a.x)[0] < 0 ? a[1] - halfPi$1 - epsilon$1 : halfPi$1 - a[1])
+ - ((b = b.x)[0] < 0 ? b[1] - halfPi$1 - epsilon$1 : halfPi$1 - b[1]);
+}
+
+var clipAntimeridian = clip(
+ function() { return true; },
+ clipAntimeridianLine,
+ clipAntimeridianInterpolate,
+ [-pi$1, -halfPi$1]
+);
+
+// Takes a line and cuts into visible segments. Return values: 0 - there were
+// intersections or the line was empty; 1 - no intersections; 2 - there were
+// intersections, and the first and last segments should be rejoined.
+function clipAntimeridianLine(stream) {
+ var lambda0 = NaN,
+ phi0 = NaN,
+ sign0 = NaN,
+ clean; // no intersections
+
+ return {
+ lineStart: function() {
+ stream.lineStart();
+ clean = 1;
+ },
+ point: function(lambda1, phi1) {
+ var sign1 = lambda1 > 0 ? pi$1 : -pi$1,
+ delta = abs$1(lambda1 - lambda0);
+ if (abs$1(delta - pi$1) < epsilon$1) { // line crosses a pole
+ stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$1 : -halfPi$1);
+ stream.point(sign0, phi0);
+ stream.lineEnd();
+ stream.lineStart();
+ stream.point(sign1, phi0);
+ stream.point(lambda1, phi0);
+ clean = 0;
+ } else if (sign0 !== sign1 && delta >= pi$1) { // line crosses antimeridian
+ if (abs$1(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies
+ if (abs$1(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
+ phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+ stream.point(sign0, phi0);
+ stream.lineEnd();
+ stream.lineStart();
+ stream.point(sign1, phi0);
+ clean = 0;
+ }
+ stream.point(lambda0 = lambda1, phi0 = phi1);
+ sign0 = sign1;
+ },
+ lineEnd: function() {
+ stream.lineEnd();
+ lambda0 = phi0 = NaN;
+ },
+ clean: function() {
+ return 2 - clean; // if intersections, rejoin first and last segments
+ }
+ };
+}
+
+function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+ var cosPhi0,
+ cosPhi1,
+ sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
+ return abs$1(sinLambda0Lambda1) > epsilon$1
+ ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)
+ - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))
+ / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
+ : (phi0 + phi1) / 2;
+}
+
+function clipAntimeridianInterpolate(from, to, direction, stream) {
+ var phi;
+ if (from == null) {
+ phi = direction * halfPi$1;
+ stream.point(-pi$1, phi);
+ stream.point(0, phi);
+ stream.point(pi$1, phi);
+ stream.point(pi$1, 0);
+ stream.point(pi$1, -phi);
+ stream.point(0, -phi);
+ stream.point(-pi$1, -phi);
+ stream.point(-pi$1, 0);
+ stream.point(-pi$1, phi);
+ } else if (abs$1(from[0] - to[0]) > epsilon$1) {
+ var lambda = from[0] < to[0] ? pi$1 : -pi$1;
+ phi = direction * lambda / 2;
+ stream.point(-lambda, phi);
+ stream.point(0, phi);
+ stream.point(lambda, phi);
+ } else {
+ stream.point(to[0], to[1]);
+ }
+}
+
+function clipCircle(radius) {
+ var cr = cos$1(radius),
+ delta = 2 * radians,
+ smallRadius = cr > 0,
+ notHemisphere = abs$1(cr) > epsilon$1; // TODO optimise for this common case
+
+ function interpolate(from, to, direction, stream) {
+ circleStream(stream, radius, delta, direction, from, to);
+ }
+
+ function visible(lambda, phi) {
+ return cos$1(lambda) * cos$1(phi) > cr;
+ }
+
+ // Takes a line and cuts into visible segments. Return values used for polygon
+ // clipping: 0 - there were intersections or the line was empty; 1 - no
+ // intersections 2 - there were intersections, and the first and last segments
+ // should be rejoined.
+ function clipLine(stream) {
+ var point0, // previous point
+ c0, // code for previous point
+ v0, // visibility of previous point
+ v00, // visibility of first point
+ clean; // no intersections
+ return {
+ lineStart: function() {
+ v00 = v0 = false;
+ clean = 1;
+ },
+ point: function(lambda, phi) {
+ var point1 = [lambda, phi],
+ point2,
+ v = visible(lambda, phi),
+ c = smallRadius
+ ? v ? 0 : code(lambda, phi)
+ : v ? code(lambda + (lambda < 0 ? pi$1 : -pi$1), phi) : 0;
+ if (!point0 && (v00 = v0 = v)) stream.lineStart();
+ if (v !== v0) {
+ point2 = intersect(point0, point1);
+ if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2))
+ point1[2] = 1;
+ }
+ if (v !== v0) {
+ clean = 0;
+ if (v) {
+ // outside going in
+ stream.lineStart();
+ point2 = intersect(point1, point0);
+ stream.point(point2[0], point2[1]);
+ } else {
+ // inside going out
+ point2 = intersect(point0, point1);
+ stream.point(point2[0], point2[1], 2);
+ stream.lineEnd();
+ }
+ point0 = point2;
+ } else if (notHemisphere && point0 && smallRadius ^ v) {
+ var t;
+ // If the codes for two points are different, or are both zero,
+ // and there this segment intersects with the small circle.
+ if (!(c & c0) && (t = intersect(point1, point0, true))) {
+ clean = 0;
+ if (smallRadius) {
+ stream.lineStart();
+ stream.point(t[0][0], t[0][1]);
+ stream.point(t[1][0], t[1][1]);
+ stream.lineEnd();
+ } else {
+ stream.point(t[1][0], t[1][1]);
+ stream.lineEnd();
+ stream.lineStart();
+ stream.point(t[0][0], t[0][1], 3);
+ }
+ }
+ }
+ if (v && (!point0 || !pointEqual(point0, point1))) {
+ stream.point(point1[0], point1[1]);
+ }
+ point0 = point1, v0 = v, c0 = c;
+ },
+ lineEnd: function() {
+ if (v0) stream.lineEnd();
+ point0 = null;
+ },
+ // Rejoin first and last segments if there were intersections and the first
+ // and last points were visible.
+ clean: function() {
+ return clean | ((v00 && v0) << 1);
+ }
+ };
+ }
+
+ // Intersects the great circle between a and b with the clip circle.
+ function intersect(a, b, two) {
+ var pa = cartesian(a),
+ pb = cartesian(b);
+
+ // We have two planes, n1.p = d1 and n2.p = d2.
+ // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
+ var n1 = [1, 0, 0], // normal
+ n2 = cartesianCross(pa, pb),
+ n2n2 = cartesianDot(n2, n2),
+ n1n2 = n2[0], // cartesianDot(n1, n2),
+ determinant = n2n2 - n1n2 * n1n2;
+
+ // Two polar points.
+ if (!determinant) return !two && a;
+
+ var c1 = cr * n2n2 / determinant,
+ c2 = -cr * n1n2 / determinant,
+ n1xn2 = cartesianCross(n1, n2),
+ A = cartesianScale(n1, c1),
+ B = cartesianScale(n2, c2);
+ cartesianAddInPlace(A, B);
+
+ // Solve |p(t)|^2 = 1.
+ var u = n1xn2,
+ w = cartesianDot(A, u),
+ uu = cartesianDot(u, u),
+ t2 = w * w - uu * (cartesianDot(A, A) - 1);
+
+ if (t2 < 0) return;
+
+ var t = sqrt$2(t2),
+ q = cartesianScale(u, (-w - t) / uu);
+ cartesianAddInPlace(q, A);
+ q = spherical(q);
+
+ if (!two) return q;
+
+ // Two intersection points.
+ var lambda0 = a[0],
+ lambda1 = b[0],
+ phi0 = a[1],
+ phi1 = b[1],
+ z;
+
+ if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+
+ var delta = lambda1 - lambda0,
+ polar = abs$1(delta - pi$1) < epsilon$1,
+ meridian = polar || delta < epsilon$1;
+
+ if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;
+
+ // Check that the first point is between a and b.
+ if (meridian
+ ? polar
+ ? phi0 + phi1 > 0 ^ q[1] < (abs$1(q[0] - lambda0) < epsilon$1 ? phi0 : phi1)
+ : phi0 <= q[1] && q[1] <= phi1
+ : delta > pi$1 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+ var q1 = cartesianScale(u, (-w + t) / uu);
+ cartesianAddInPlace(q1, A);
+ return [q, spherical(q1)];
+ }
+ }
+
+ // Generates a 4-bit vector representing the location of a point relative to
+ // the small circle's bounding box.
+ function code(lambda, phi) {
+ var r = smallRadius ? radius : pi$1 - radius,
+ code = 0;
+ if (lambda < -r) code |= 1; // left
+ else if (lambda > r) code |= 2; // right
+ if (phi < -r) code |= 4; // below
+ else if (phi > r) code |= 8; // above
+ return code;
+ }
+
+ return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$1, radius - pi$1]);
+}
+
+function clipLine(a, b, x0, y0, x1, y1) {
+ var ax = a[0],
+ ay = a[1],
+ bx = b[0],
+ by = b[1],
+ t0 = 0,
+ t1 = 1,
+ dx = bx - ax,
+ dy = by - ay,
+ r;
+
+ r = x0 - ax;
+ if (!dx && r > 0) return;
+ r /= dx;
+ if (dx < 0) {
+ if (r < t0) return;
+ if (r < t1) t1 = r;
+ } else if (dx > 0) {
+ if (r > t1) return;
+ if (r > t0) t0 = r;
+ }
+
+ r = x1 - ax;
+ if (!dx && r < 0) return;
+ r /= dx;
+ if (dx < 0) {
+ if (r > t1) return;
+ if (r > t0) t0 = r;
+ } else if (dx > 0) {
+ if (r < t0) return;
+ if (r < t1) t1 = r;
+ }
+
+ r = y0 - ay;
+ if (!dy && r > 0) return;
+ r /= dy;
+ if (dy < 0) {
+ if (r < t0) return;
+ if (r < t1) t1 = r;
+ } else if (dy > 0) {
+ if (r > t1) return;
+ if (r > t0) t0 = r;
+ }
+
+ r = y1 - ay;
+ if (!dy && r < 0) return;
+ r /= dy;
+ if (dy < 0) {
+ if (r > t1) return;
+ if (r > t0) t0 = r;
+ } else if (dy > 0) {
+ if (r < t0) return;
+ if (r < t1) t1 = r;
+ }
+
+ if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+ if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+ return true;
+}
+
+var clipMax = 1e9, clipMin = -clipMax;
+
+// TODO Use d3-polygon’s polygonContains here for the ring check?
+// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+
+function clipRectangle(x0, y0, x1, y1) {
+
+ function visible(x, y) {
+ return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+ }
+
+ function interpolate(from, to, direction, stream) {
+ var a = 0, a1 = 0;
+ if (from == null
+ || (a = corner(from, direction)) !== (a1 = corner(to, direction))
+ || comparePoint(from, to) < 0 ^ direction > 0) {
+ do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+ while ((a = (a + direction + 4) % 4) !== a1);
+ } else {
+ stream.point(to[0], to[1]);
+ }
+ }
+
+ function corner(p, direction) {
+ return abs$1(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3
+ : abs$1(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1
+ : abs$1(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0
+ : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+ }
+
+ function compareIntersection(a, b) {
+ return comparePoint(a.x, b.x);
+ }
+
+ function comparePoint(a, b) {
+ var ca = corner(a, 1),
+ cb = corner(b, 1);
+ return ca !== cb ? ca - cb
+ : ca === 0 ? b[1] - a[1]
+ : ca === 1 ? a[0] - b[0]
+ : ca === 2 ? a[1] - b[1]
+ : b[0] - a[0];
+ }
+
+ return function(stream) {
+ var activeStream = stream,
+ bufferStream = clipBuffer(),
+ segments,
+ polygon,
+ ring,
+ x__, y__, v__, // first point
+ x_, y_, v_, // previous point
+ first,
+ clean;
+
+ var clipStream = {
+ point: point,
+ lineStart: lineStart,
+ lineEnd: lineEnd,
+ polygonStart: polygonStart,
+ polygonEnd: polygonEnd
+ };
+
+ function point(x, y) {
+ if (visible(x, y)) activeStream.point(x, y);
+ }
+
+ function polygonInside() {
+ var winding = 0;
+
+ for (var i = 0, n = polygon.length; i < n; ++i) {
+ for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+ a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
+ if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
+ else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
+ }
+ }
+
+ return winding;
+ }
+
+ // Buffer geometry within a polygon and then clip it en masse.
+ function polygonStart() {
+ activeStream = bufferStream, segments = [], polygon = [], clean = true;
+ }
+
+ function polygonEnd() {
+ var startInside = polygonInside(),
+ cleanInside = clean && startInside,
+ visible = (segments = merge(segments)).length;
+ if (cleanInside || visible) {
+ stream.polygonStart();
+ if (cleanInside) {
+ stream.lineStart();
+ interpolate(null, null, 1, stream);
+ stream.lineEnd();
+ }
+ if (visible) {
+ clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+ }
+ stream.polygonEnd();
+ }
+ activeStream = stream, segments = polygon = ring = null;
+ }
+
+ function lineStart() {
+ clipStream.point = linePoint;
+ if (polygon) polygon.push(ring = []);
+ first = true;
+ v_ = false;
+ x_ = y_ = NaN;
+ }
+
+ // TODO rather than special-case polygons, simply handle them separately.
+ // Ideally, coincident intersection points should be jittered to avoid
+ // clipping issues.
+ function lineEnd() {
+ if (segments) {
+ linePoint(x__, y__);
+ if (v__ && v_) bufferStream.rejoin();
+ segments.push(bufferStream.result());
+ }
+ clipStream.point = point;
+ if (v_) activeStream.lineEnd();
+ }
+
+ function linePoint(x, y) {
+ var v = visible(x, y);
+ if (polygon) ring.push([x, y]);
+ if (first) {
+ x__ = x, y__ = y, v__ = v;
+ first = false;
+ if (v) {
+ activeStream.lineStart();
+ activeStream.point(x, y);
+ }
+ } else {
+ if (v && v_) activeStream.point(x, y);
+ else {
+ var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+ b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
+ if (clipLine(a, b, x0, y0, x1, y1)) {
+ if (!v_) {
+ activeStream.lineStart();
+ activeStream.point(a[0], a[1]);
+ }
+ activeStream.point(b[0], b[1]);
+ if (!v) activeStream.lineEnd();
+ clean = false;
+ } else if (v) {
+ activeStream.lineStart();
+ activeStream.point(x, y);
+ clean = false;
+ }
+ }
+ }
+ x_ = x, y_ = y, v_ = v;
+ }
+
+ return clipStream;
+ };
+}
+
+function extent() {
+ var x0 = 0,
+ y0 = 0,
+ x1 = 960,
+ y1 = 500,
+ cache,
+ cacheStream,
+ clip;
+
+ return clip = {
+ stream: function(stream) {
+ return cache && cacheStream === stream ? cache : cache = clipRectangle(x0, y0, x1, y1)(cacheStream = stream);
+ },
+ extent: function(_) {
+ return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
+ }
+ };
+}
+
+var lengthSum$1,
+ lambda0,
+ sinPhi0,
+ cosPhi0;
+
+var lengthStream$1 = {
+ sphere: noop$1,
+ point: noop$1,
+ lineStart: lengthLineStart,
+ lineEnd: noop$1,
+ polygonStart: noop$1,
+ polygonEnd: noop$1
+};
+
+function lengthLineStart() {
+ lengthStream$1.point = lengthPointFirst$1;
+ lengthStream$1.lineEnd = lengthLineEnd;
+}
+
+function lengthLineEnd() {
+ lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
+}
+
+function lengthPointFirst$1(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ lambda0 = lambda, sinPhi0 = sin$1(phi), cosPhi0 = cos$1(phi);
+ lengthStream$1.point = lengthPoint$1;
+}
+
+function lengthPoint$1(lambda, phi) {
+ lambda *= radians, phi *= radians;
+ var sinPhi = sin$1(phi),
+ cosPhi = cos$1(phi),
+ delta = abs$1(lambda - lambda0),
+ cosDelta = cos$1(delta),
+ sinDelta = sin$1(delta),
+ x = cosPhi * sinDelta,
+ y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
+ z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
+ lengthSum$1.add(atan2$1(sqrt$2(x * x + y * y), z));
+ lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;
+}
+
+function length$1(object) {
+ lengthSum$1 = new Adder();
+ geoStream(object, lengthStream$1);
+ return +lengthSum$1;
+}
+
+var coordinates = [null, null],
+ object = {type: "LineString", coordinates: coordinates};
+
+function distance(a, b) {
+ coordinates[0] = a;
+ coordinates[1] = b;
+ return length$1(object);
+}
+
+var containsObjectType = {
+ Feature: function(object, point) {
+ return containsGeometry(object.geometry, point);
+ },
+ FeatureCollection: function(object, point) {
+ var features = object.features, i = -1, n = features.length;
+ while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;
+ return false;
+ }
+};
+
+var containsGeometryType = {
+ Sphere: function() {
+ return true;
+ },
+ Point: function(object, point) {
+ return containsPoint(object.coordinates, point);
+ },
+ MultiPoint: function(object, point) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) if (containsPoint(coordinates[i], point)) return true;
+ return false;
+ },
+ LineString: function(object, point) {
+ return containsLine(object.coordinates, point);
+ },
+ MultiLineString: function(object, point) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) if (containsLine(coordinates[i], point)) return true;
+ return false;
+ },
+ Polygon: function(object, point) {
+ return containsPolygon(object.coordinates, point);
+ },
+ MultiPolygon: function(object, point) {
+ var coordinates = object.coordinates, i = -1, n = coordinates.length;
+ while (++i < n) if (containsPolygon(coordinates[i], point)) return true;
+ return false;
+ },
+ GeometryCollection: function(object, point) {
+ var geometries = object.geometries, i = -1, n = geometries.length;
+ while (++i < n) if (containsGeometry(geometries[i], point)) return true;
+ return false;
+ }
+};
+
+function containsGeometry(geometry, point) {
+ return geometry && containsGeometryType.hasOwnProperty(geometry.type)
+ ? containsGeometryType[geometry.type](geometry, point)
+ : false;
+}
+
+function containsPoint(coordinates, point) {
+ return distance(coordinates, point) === 0;
+}
+
+function containsLine(coordinates, point) {
+ var ao, bo, ab;
+ for (var i = 0, n = coordinates.length; i < n; i++) {
+ bo = distance(coordinates[i], point);
+ if (bo === 0) return true;
+ if (i > 0) {
+ ab = distance(coordinates[i], coordinates[i - 1]);
+ if (
+ ab > 0 &&
+ ao <= ab &&
+ bo <= ab &&
+ (ao + bo - ab) * (1 - Math.pow((ao - bo) / ab, 2)) < epsilon2 * ab
+ )
+ return true;
+ }
+ ao = bo;
+ }
+ return false;
+}
+
+function containsPolygon(coordinates, point) {
+ return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));
+}
+
+function ringRadians(ring) {
+ return ring = ring.map(pointRadians), ring.pop(), ring;
+}
+
+function pointRadians(point) {
+ return [point[0] * radians, point[1] * radians];
+}
+
+function contains$1(object, point) {
+ return (object && containsObjectType.hasOwnProperty(object.type)
+ ? containsObjectType[object.type]
+ : containsGeometry)(object, point);
+}
+
+function graticuleX(y0, y1, dy) {
+ var y = range$2(y0, y1 - epsilon$1, dy).concat(y1);
+ return function(x) { return y.map(function(y) { return [x, y]; }); };
+}
+
+function graticuleY(x0, x1, dx) {
+ var x = range$2(x0, x1 - epsilon$1, dx).concat(x1);
+ return function(y) { return x.map(function(x) { return [x, y]; }); };
+}
+
+function graticule() {
+ var x1, x0, X1, X0,
+ y1, y0, Y1, Y0,
+ dx = 10, dy = dx, DX = 90, DY = 360,
+ x, y, X, Y,
+ precision = 2.5;
+
+ function graticule() {
+ return {type: "MultiLineString", coordinates: lines()};
+ }
+
+ function lines() {
+ return range$2(ceil(X0 / DX) * DX, X1, DX).map(X)
+ .concat(range$2(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
+ .concat(range$2(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs$1(x % DX) > epsilon$1; }).map(x))
+ .concat(range$2(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs$1(y % DY) > epsilon$1; }).map(y));
+ }
+
+ graticule.lines = function() {
+ return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
+ };
+
+ graticule.outline = function() {
+ return {
+ type: "Polygon",
+ coordinates: [
+ X(X0).concat(
+ Y(Y1).slice(1),
+ X(X1).reverse().slice(1),
+ Y(Y0).reverse().slice(1))
+ ]
+ };
+ };
+
+ graticule.extent = function(_) {
+ if (!arguments.length) return graticule.extentMinor();
+ return graticule.extentMajor(_).extentMinor(_);
+ };
+
+ graticule.extentMajor = function(_) {
+ if (!arguments.length) return [[X0, Y0], [X1, Y1]];
+ X0 = +_[0][0], X1 = +_[1][0];
+ Y0 = +_[0][1], Y1 = +_[1][1];
+ if (X0 > X1) _ = X0, X0 = X1, X1 = _;
+ if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
+ return graticule.precision(precision);
+ };
+
+ graticule.extentMinor = function(_) {
+ if (!arguments.length) return [[x0, y0], [x1, y1]];
+ x0 = +_[0][0], x1 = +_[1][0];
+ y0 = +_[0][1], y1 = +_[1][1];
+ if (x0 > x1) _ = x0, x0 = x1, x1 = _;
+ if (y0 > y1) _ = y0, y0 = y1, y1 = _;
+ return graticule.precision(precision);
+ };
+
+ graticule.step = function(_) {
+ if (!arguments.length) return graticule.stepMinor();
+ return graticule.stepMajor(_).stepMinor(_);
+ };
+
+ graticule.stepMajor = function(_) {
+ if (!arguments.length) return [DX, DY];
+ DX = +_[0], DY = +_[1];
+ return graticule;
+ };
+
+ graticule.stepMinor = function(_) {
+ if (!arguments.length) return [dx, dy];
+ dx = +_[0], dy = +_[1];
+ return graticule;
+ };
+
+ graticule.precision = function(_) {
+ if (!arguments.length) return precision;
+ precision = +_;
+ x = graticuleX(y0, y1, 90);
+ y = graticuleY(x0, x1, precision);
+ X = graticuleX(Y0, Y1, 90);
+ Y = graticuleY(X0, X1, precision);
+ return graticule;
+ };
+
+ return graticule
+ .extentMajor([[-180, -90 + epsilon$1], [180, 90 - epsilon$1]])
+ .extentMinor([[-180, -80 - epsilon$1], [180, 80 + epsilon$1]]);
+}
+
+function graticule10() {
+ return graticule()();
+}
+
+function interpolate(a, b) {
+ var x0 = a[0] * radians,
+ y0 = a[1] * radians,
+ x1 = b[0] * radians,
+ y1 = b[1] * radians,
+ cy0 = cos$1(y0),
+ sy0 = sin$1(y0),
+ cy1 = cos$1(y1),
+ sy1 = sin$1(y1),
+ kx0 = cy0 * cos$1(x0),
+ ky0 = cy0 * sin$1(x0),
+ kx1 = cy1 * cos$1(x1),
+ ky1 = cy1 * sin$1(x1),
+ d = 2 * asin$1(sqrt$2(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
+ k = sin$1(d);
+
+ var interpolate = d ? function(t) {
+ var B = sin$1(t *= d) / k,
+ A = sin$1(d - t) / k,
+ x = A * kx0 + B * kx1,
+ y = A * ky0 + B * ky1,
+ z = A * sy0 + B * sy1;
+ return [
+ atan2$1(y, x) * degrees,
+ atan2$1(z, sqrt$2(x * x + y * y)) * degrees
+ ];
+ } : function() {
+ return [x0 * degrees, y0 * degrees];
+ };
+
+ interpolate.distance = d;
+
+ return interpolate;
+}
+
+var identity$5 = x => x;
+
+var areaSum = new Adder(),
+ areaRingSum = new Adder(),
+ x00$2,
+ y00$2,
+ x0$3,
+ y0$3;
+
+var areaStream = {
+ point: noop$1,
+ lineStart: noop$1,
+ lineEnd: noop$1,
+ polygonStart: function() {
+ areaStream.lineStart = areaRingStart;
+ areaStream.lineEnd = areaRingEnd;
+ },
+ polygonEnd: function() {
+ areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+ areaSum.add(abs$1(areaRingSum));
+ areaRingSum = new Adder();
+ },
+ result: function() {
+ var area = areaSum / 2;
+ areaSum = new Adder();
+ return area;
+ }
+};
+
+function areaRingStart() {
+ areaStream.point = areaPointFirst;
+}
+
+function areaPointFirst(x, y) {
+ areaStream.point = areaPoint;
+ x00$2 = x0$3 = x, y00$2 = y0$3 = y;
+}
+
+function areaPoint(x, y) {
+ areaRingSum.add(y0$3 * x - x0$3 * y);
+ x0$3 = x, y0$3 = y;
+}
+
+function areaRingEnd() {
+ areaPoint(x00$2, y00$2);
+}
+
+var pathArea = areaStream;
+
+var x0$2 = Infinity,
+ y0$2 = x0$2,
+ x1 = -x0$2,
+ y1 = x1;
+
+var boundsStream = {
+ point: boundsPoint,
+ lineStart: noop$1,
+ lineEnd: noop$1,
+ polygonStart: noop$1,
+ polygonEnd: noop$1,
+ result: function() {
+ var bounds = [[x0$2, y0$2], [x1, y1]];
+ x1 = y1 = -(y0$2 = x0$2 = Infinity);
+ return bounds;
+ }
+};
+
+function boundsPoint(x, y) {
+ if (x < x0$2) x0$2 = x;
+ if (x > x1) x1 = x;
+ if (y < y0$2) y0$2 = y;
+ if (y > y1) y1 = y;
+}
+
+var boundsStream$1 = boundsStream;
+
+// TODO Enforce positive area for exterior, negative area for interior?
+
+var X0 = 0,
+ Y0 = 0,
+ Z0 = 0,
+ X1 = 0,
+ Y1 = 0,
+ Z1 = 0,
+ X2 = 0,
+ Y2 = 0,
+ Z2 = 0,
+ x00$1,
+ y00$1,
+ x0$1,
+ y0$1;
+
+var centroidStream = {
+ point: centroidPoint,
+ lineStart: centroidLineStart,
+ lineEnd: centroidLineEnd,
+ polygonStart: function() {
+ centroidStream.lineStart = centroidRingStart;
+ centroidStream.lineEnd = centroidRingEnd;
+ },
+ polygonEnd: function() {
+ centroidStream.point = centroidPoint;
+ centroidStream.lineStart = centroidLineStart;
+ centroidStream.lineEnd = centroidLineEnd;
+ },
+ result: function() {
+ var centroid = Z2 ? [X2 / Z2, Y2 / Z2]
+ : Z1 ? [X1 / Z1, Y1 / Z1]
+ : Z0 ? [X0 / Z0, Y0 / Z0]
+ : [NaN, NaN];
+ X0 = Y0 = Z0 =
+ X1 = Y1 = Z1 =
+ X2 = Y2 = Z2 = 0;
+ return centroid;
+ }
+};
+
+function centroidPoint(x, y) {
+ X0 += x;
+ Y0 += y;
+ ++Z0;
+}
+
+function centroidLineStart() {
+ centroidStream.point = centroidPointFirstLine;
+}
+
+function centroidPointFirstLine(x, y) {
+ centroidStream.point = centroidPointLine;
+ centroidPoint(x0$1 = x, y0$1 = y);
+}
+
+function centroidPointLine(x, y) {
+ var dx = x - x0$1, dy = y - y0$1, z = sqrt$2(dx * dx + dy * dy);
+ X1 += z * (x0$1 + x) / 2;
+ Y1 += z * (y0$1 + y) / 2;
+ Z1 += z;
+ centroidPoint(x0$1 = x, y0$1 = y);
+}
+
+function centroidLineEnd() {
+ centroidStream.point = centroidPoint;
+}
+
+function centroidRingStart() {
+ centroidStream.point = centroidPointFirstRing;
+}
+
+function centroidRingEnd() {
+ centroidPointRing(x00$1, y00$1);
+}
+
+function centroidPointFirstRing(x, y) {
+ centroidStream.point = centroidPointRing;
+ centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
+}
+
+function centroidPointRing(x, y) {
+ var dx = x - x0$1,
+ dy = y - y0$1,
+ z = sqrt$2(dx * dx + dy * dy);
+
+ X1 += z * (x0$1 + x) / 2;
+ Y1 += z * (y0$1 + y) / 2;
+ Z1 += z;
+
+ z = y0$1 * x - x0$1 * y;
+ X2 += z * (x0$1 + x);
+ Y2 += z * (y0$1 + y);
+ Z2 += z * 3;
+ centroidPoint(x0$1 = x, y0$1 = y);
+}
+
+var pathCentroid = centroidStream;
+
+function PathContext(context) {
+ this._context = context;
+}
+
+PathContext.prototype = {
+ _radius: 4.5,
+ pointRadius: function(_) {
+ return this._radius = _, this;
+ },
+ polygonStart: function() {
+ this._line = 0;
+ },
+ polygonEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._line === 0) this._context.closePath();
+ this._point = NaN;
+ },
+ point: function(x, y) {
+ switch (this._point) {
+ case 0: {
+ this._context.moveTo(x, y);
+ this._point = 1;
+ break;
+ }
+ case 1: {
+ this._context.lineTo(x, y);
+ break;
+ }
+ default: {
+ this._context.moveTo(x + this._radius, y);
+ this._context.arc(x, y, this._radius, 0, tau$1);
+ break;
+ }
+ }
+ },
+ result: noop$1
+};
+
+var lengthSum = new Adder(),
+ lengthRing,
+ x00,
+ y00,
+ x0,
+ y0;
+
+var lengthStream = {
+ point: noop$1,
+ lineStart: function() {
+ lengthStream.point = lengthPointFirst;
+ },
+ lineEnd: function() {
+ if (lengthRing) lengthPoint(x00, y00);
+ lengthStream.point = noop$1;
+ },
+ polygonStart: function() {
+ lengthRing = true;
+ },
+ polygonEnd: function() {
+ lengthRing = null;
+ },
+ result: function() {
+ var length = +lengthSum;
+ lengthSum = new Adder();
+ return length;
+ }
+};
+
+function lengthPointFirst(x, y) {
+ lengthStream.point = lengthPoint;
+ x00 = x0 = x, y00 = y0 = y;
+}
+
+function lengthPoint(x, y) {
+ x0 -= x, y0 -= y;
+ lengthSum.add(sqrt$2(x0 * x0 + y0 * y0));
+ x0 = x, y0 = y;
+}
+
+var pathMeasure = lengthStream;
+
+// Simple caching for constant-radius points.
+let cacheDigits, cacheAppend, cacheRadius, cacheCircle;
+
+class PathString {
+ constructor(digits) {
+ this._append = digits == null ? append : appendRound(digits);
+ this._radius = 4.5;
+ this._ = "";
+ }
+ pointRadius(_) {
+ this._radius = +_;
+ return this;
+ }
+ polygonStart() {
+ this._line = 0;
+ }
+ polygonEnd() {
+ this._line = NaN;
+ }
+ lineStart() {
+ this._point = 0;
+ }
+ lineEnd() {
+ if (this._line === 0) this._ += "Z";
+ this._point = NaN;
+ }
+ point(x, y) {
+ switch (this._point) {
+ case 0: {
+ this._append`M${x},${y}`;
+ this._point = 1;
+ break;
+ }
+ case 1: {
+ this._append`L${x},${y}`;
+ break;
+ }
+ default: {
+ this._append`M${x},${y}`;
+ if (this._radius !== cacheRadius || this._append !== cacheAppend) {
+ const r = this._radius;
+ const s = this._;
+ this._ = ""; // stash the old string so we can cache the circle path fragment
+ this._append`m0,${r}a${r},${r} 0 1,1 0,${-2 * r}a${r},${r} 0 1,1 0,${2 * r}z`;
+ cacheRadius = r;
+ cacheAppend = this._append;
+ cacheCircle = this._;
+ this._ = s;
+ }
+ this._ += cacheCircle;
+ break;
+ }
+ }
+ }
+ result() {
+ const result = this._;
+ this._ = "";
+ return result.length ? result : null;
+ }
+}
+
+function append(strings) {
+ let i = 1;
+ this._ += strings[0];
+ for (const j = strings.length; i < j; ++i) {
+ this._ += arguments[i] + strings[i];
+ }
+}
+
+function appendRound(digits) {
+ const d = Math.floor(digits);
+ if (!(d >= 0)) throw new RangeError(`invalid digits: ${digits}`);
+ if (d > 15) return append;
+ if (d !== cacheDigits) {
+ const k = 10 ** d;
+ cacheDigits = d;
+ cacheAppend = function append(strings) {
+ let i = 1;
+ this._ += strings[0];
+ for (const j = strings.length; i < j; ++i) {
+ this._ += Math.round(arguments[i] * k) / k + strings[i];
+ }
+ };
+ }
+ return cacheAppend;
+}
+
+function index$2(projection, context) {
+ let digits = 3,
+ pointRadius = 4.5,
+ projectionStream,
+ contextStream;
+
+ function path(object) {
+ if (object) {
+ if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+ geoStream(object, projectionStream(contextStream));
+ }
+ return contextStream.result();
+ }
+
+ path.area = function(object) {
+ geoStream(object, projectionStream(pathArea));
+ return pathArea.result();
+ };
+
+ path.measure = function(object) {
+ geoStream(object, projectionStream(pathMeasure));
+ return pathMeasure.result();
+ };
+
+ path.bounds = function(object) {
+ geoStream(object, projectionStream(boundsStream$1));
+ return boundsStream$1.result();
+ };
+
+ path.centroid = function(object) {
+ geoStream(object, projectionStream(pathCentroid));
+ return pathCentroid.result();
+ };
+
+ path.projection = function(_) {
+ if (!arguments.length) return projection;
+ projectionStream = _ == null ? (projection = null, identity$5) : (projection = _).stream;
+ return path;
+ };
+
+ path.context = function(_) {
+ if (!arguments.length) return context;
+ contextStream = _ == null ? (context = null, new PathString(digits)) : new PathContext(context = _);
+ if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+ return path;
+ };
+
+ path.pointRadius = function(_) {
+ if (!arguments.length) return pointRadius;
+ pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+ return path;
+ };
+
+ path.digits = function(_) {
+ if (!arguments.length) return digits;
+ if (_ == null) digits = null;
+ else {
+ const d = Math.floor(_);
+ if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);
+ digits = d;
+ }
+ if (context === null) contextStream = new PathString(digits);
+ return path;
+ };
+
+ return path.projection(projection).digits(digits).context(context);
+}
+
+function transform$1(methods) {
+ return {
+ stream: transformer$3(methods)
+ };
+}
+
+function transformer$3(methods) {
+ return function(stream) {
+ var s = new TransformStream;
+ for (var key in methods) s[key] = methods[key];
+ s.stream = stream;
+ return s;
+ };
+}
+
+function TransformStream() {}
+
+TransformStream.prototype = {
+ constructor: TransformStream,
+ point: function(x, y) { this.stream.point(x, y); },
+ sphere: function() { this.stream.sphere(); },
+ lineStart: function() { this.stream.lineStart(); },
+ lineEnd: function() { this.stream.lineEnd(); },
+ polygonStart: function() { this.stream.polygonStart(); },
+ polygonEnd: function() { this.stream.polygonEnd(); }
+};
+
+function fit(projection, fitBounds, object) {
+ var clip = projection.clipExtent && projection.clipExtent();
+ projection.scale(150).translate([0, 0]);
+ if (clip != null) projection.clipExtent(null);
+ geoStream(object, projection.stream(boundsStream$1));
+ fitBounds(boundsStream$1.result());
+ if (clip != null) projection.clipExtent(clip);
+ return projection;
+}
+
+function fitExtent(projection, extent, object) {
+ return fit(projection, function(b) {
+ var w = extent[1][0] - extent[0][0],
+ h = extent[1][1] - extent[0][1],
+ k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+ x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+ y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+ projection.scale(150 * k).translate([x, y]);
+ }, object);
+}
+
+function fitSize(projection, size, object) {
+ return fitExtent(projection, [[0, 0], size], object);
+}
+
+function fitWidth(projection, width, object) {
+ return fit(projection, function(b) {
+ var w = +width,
+ k = w / (b[1][0] - b[0][0]),
+ x = (w - k * (b[1][0] + b[0][0])) / 2,
+ y = -k * b[0][1];
+ projection.scale(150 * k).translate([x, y]);
+ }, object);
+}
+
+function fitHeight(projection, height, object) {
+ return fit(projection, function(b) {
+ var h = +height,
+ k = h / (b[1][1] - b[0][1]),
+ x = -k * b[0][0],
+ y = (h - k * (b[1][1] + b[0][1])) / 2;
+ projection.scale(150 * k).translate([x, y]);
+ }, object);
+}
+
+var maxDepth = 16, // maximum depth of subdivision
+ cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)
+
+function resample(project, delta2) {
+ return +delta2 ? resample$1(project, delta2) : resampleNone(project);
+}
+
+function resampleNone(project) {
+ return transformer$3({
+ point: function(x, y) {
+ x = project(x, y);
+ this.stream.point(x[0], x[1]);
+ }
+ });
+}
+
+function resample$1(project, delta2) {
+
+ function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+ var dx = x1 - x0,
+ dy = y1 - y0,
+ d2 = dx * dx + dy * dy;
+ if (d2 > 4 * delta2 && depth--) {
+ var a = a0 + a1,
+ b = b0 + b1,
+ c = c0 + c1,
+ m = sqrt$2(a * a + b * b + c * c),
+ phi2 = asin$1(c /= m),
+ lambda2 = abs$1(abs$1(c) - 1) < epsilon$1 || abs$1(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2$1(b, a),
+ p = project(lambda2, phi2),
+ x2 = p[0],
+ y2 = p[1],
+ dx2 = x2 - x0,
+ dy2 = y2 - y0,
+ dz = dy * dx2 - dx * dy2;
+ if (dz * dz / d2 > delta2 // perpendicular projected distance
+ || abs$1((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+ || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
+ resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+ stream.point(x2, y2);
+ resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+ }
+ }
+ }
+ return function(stream) {
+ var lambda00, x00, y00, a00, b00, c00, // first point
+ lambda0, x0, y0, a0, b0, c0; // previous point
+
+ var resampleStream = {
+ point: point,
+ lineStart: lineStart,
+ lineEnd: lineEnd,
+ polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
+ polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
+ };
+
+ function point(x, y) {
+ x = project(x, y);
+ stream.point(x[0], x[1]);
+ }
+
+ function lineStart() {
+ x0 = NaN;
+ resampleStream.point = linePoint;
+ stream.lineStart();
+ }
+
+ function linePoint(lambda, phi) {
+ var c = cartesian([lambda, phi]), p = project(lambda, phi);
+ resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+ stream.point(x0, y0);
+ }
+
+ function lineEnd() {
+ resampleStream.point = point;
+ stream.lineEnd();
+ }
+
+ function ringStart() {
+ lineStart();
+ resampleStream.point = ringPoint;
+ resampleStream.lineEnd = ringEnd;
+ }
+
+ function ringPoint(lambda, phi) {
+ linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+ resampleStream.point = linePoint;
+ }
+
+ function ringEnd() {
+ resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+ resampleStream.lineEnd = lineEnd;
+ lineEnd();
+ }
+
+ return resampleStream;
+ };
+}
+
+var transformRadians = transformer$3({
+ point: function(x, y) {
+ this.stream.point(x * radians, y * radians);
+ }
+});
+
+function transformRotate(rotate) {
+ return transformer$3({
+ point: function(x, y) {
+ var r = rotate(x, y);
+ return this.stream.point(r[0], r[1]);
+ }
+ });
+}
+
+function scaleTranslate(k, dx, dy, sx, sy) {
+ function transform(x, y) {
+ x *= sx; y *= sy;
+ return [dx + k * x, dy - k * y];
+ }
+ transform.invert = function(x, y) {
+ return [(x - dx) / k * sx, (dy - y) / k * sy];
+ };
+ return transform;
+}
+
+function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
+ if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
+ var cosAlpha = cos$1(alpha),
+ sinAlpha = sin$1(alpha),
+ a = cosAlpha * k,
+ b = sinAlpha * k,
+ ai = cosAlpha / k,
+ bi = sinAlpha / k,
+ ci = (sinAlpha * dy - cosAlpha * dx) / k,
+ fi = (sinAlpha * dx + cosAlpha * dy) / k;
+ function transform(x, y) {
+ x *= sx; y *= sy;
+ return [a * x - b * y + dx, dy - b * x - a * y];
+ }
+ transform.invert = function(x, y) {
+ return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+ };
+ return transform;
+}
+
+function projection(project) {
+ return projectionMutator(function() { return project; })();
+}
+
+function projectionMutator(projectAt) {
+ var project,
+ k = 150, // scale
+ x = 480, y = 250, // translate
+ lambda = 0, phi = 0, // center
+ deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
+ alpha = 0, // post-rotate angle
+ sx = 1, // reflectX
+ sy = 1, // reflectX
+ theta = null, preclip = clipAntimeridian, // pre-clip angle
+ x0 = null, y0, x1, y1, postclip = identity$5, // post-clip extent
+ delta2 = 0.5, // precision
+ projectResample,
+ projectTransform,
+ projectRotateTransform,
+ cache,
+ cacheStream;
+
+ function projection(point) {
+ return projectRotateTransform(point[0] * radians, point[1] * radians);
+ }
+
+ function invert(point) {
+ point = projectRotateTransform.invert(point[0], point[1]);
+ return point && [point[0] * degrees, point[1] * degrees];
+ }
+
+ projection.stream = function(stream) {
+ return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+ };
+
+ projection.preclip = function(_) {
+ return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+ };
+
+ projection.postclip = function(_) {
+ return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+ };
+
+ projection.clipAngle = function(_) {
+ return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
+ };
+
+ projection.clipExtent = function(_) {
+ return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$5) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+ };
+
+ projection.scale = function(_) {
+ return arguments.length ? (k = +_, recenter()) : k;
+ };
+
+ projection.translate = function(_) {
+ return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+ };
+
+ projection.center = function(_) {
+ return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
+ };
+
+ projection.rotate = function(_) {
+ return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
+ };
+
+ projection.angle = function(_) {
+ return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
+ };
+
+ projection.reflectX = function(_) {
+ return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+ };
+
+ projection.reflectY = function(_) {
+ return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+ };
+
+ projection.precision = function(_) {
+ return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$2(delta2);
+ };
+
+ projection.fitExtent = function(extent, object) {
+ return fitExtent(projection, extent, object);
+ };
+
+ projection.fitSize = function(size, object) {
+ return fitSize(projection, size, object);
+ };
+
+ projection.fitWidth = function(width, object) {
+ return fitWidth(projection, width, object);
+ };
+
+ projection.fitHeight = function(height, object) {
+ return fitHeight(projection, height, object);
+ };
+
+ function recenter() {
+ var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+ transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
+ rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+ projectTransform = compose(project, transform);
+ projectRotateTransform = compose(rotate, projectTransform);
+ projectResample = resample(projectTransform, delta2);
+ return reset();
+ }
+
+ function reset() {
+ cache = cacheStream = null;
+ return projection;
+ }
+
+ return function() {
+ project = projectAt.apply(this, arguments);
+ projection.invert = project.invert && invert;
+ return recenter();
+ };
+}
+
+function conicProjection(projectAt) {
+ var phi0 = 0,
+ phi1 = pi$1 / 3,
+ m = projectionMutator(projectAt),
+ p = m(phi0, phi1);
+
+ p.parallels = function(_) {
+ return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees, phi1 * degrees];
+ };
+
+ return p;
+}
+
+function cylindricalEqualAreaRaw(phi0) {
+ var cosPhi0 = cos$1(phi0);
+
+ function forward(lambda, phi) {
+ return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
+ }
+
+ forward.invert = function(x, y) {
+ return [x / cosPhi0, asin$1(y * cosPhi0)];
+ };
+
+ return forward;
+}
+
+function conicEqualAreaRaw(y0, y1) {
+ var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;
+
+ // Are the parallels symmetrical around the Equator?
+ if (abs$1(n) < epsilon$1) return cylindricalEqualAreaRaw(y0);
+
+ var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt$2(c) / n;
+
+ function project(x, y) {
+ var r = sqrt$2(c - 2 * n * sin$1(y)) / n;
+ return [r * sin$1(x *= n), r0 - r * cos$1(x)];
+ }
+
+ project.invert = function(x, y) {
+ var r0y = r0 - y,
+ l = atan2$1(x, abs$1(r0y)) * sign$1(r0y);
+ if (r0y * n < 0)
+ l -= pi$1 * sign$1(x) * sign$1(r0y);
+ return [l / n, asin$1((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
+ };
+
+ return project;
+}
+
+function conicEqualArea() {
+ return conicProjection(conicEqualAreaRaw)
+ .scale(155.424)
+ .center([0, 33.6442]);
+}
+
+function albers() {
+ return conicEqualArea()
+ .parallels([29.5, 45.5])
+ .scale(1070)
+ .translate([480, 250])
+ .rotate([96, 0])
+ .center([-0.6, 38.7]);
+}
+
+// The projections must have mutually exclusive clip regions on the sphere,
+// as this will avoid emitting interleaving lines and polygons.
+function multiplex(streams) {
+ var n = streams.length;
+ return {
+ point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
+ sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
+ lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
+ lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
+ polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
+ polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
+ };
+}
+
+// A composite projection for the United States, configured by default for
+// 960×500. The projection also works quite well at 960×600 if you change the
+// scale to 1285 and adjust the translate accordingly. The set of standard
+// parallels for each region comes from USGS, which is published here:
+// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
+function albersUsa() {
+ var cache,
+ cacheStream,
+ lower48 = albers(), lower48Point,
+ alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
+ hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
+ point, pointStream = {point: function(x, y) { point = [x, y]; }};
+
+ function albersUsa(coordinates) {
+ var x = coordinates[0], y = coordinates[1];
+ return point = null,
+ (lower48Point.point(x, y), point)
+ || (alaskaPoint.point(x, y), point)
+ || (hawaiiPoint.point(x, y), point);
+ }
+
+ albersUsa.invert = function(coordinates) {
+ var k = lower48.scale(),
+ t = lower48.translate(),
+ x = (coordinates[0] - t[0]) / k,
+ y = (coordinates[1] - t[1]) / k;
+ return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
+ : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
+ : lower48).invert(coordinates);
+ };
+
+ albersUsa.stream = function(stream) {
+ return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
+ };
+
+ albersUsa.precision = function(_) {
+ if (!arguments.length) return lower48.precision();
+ lower48.precision(_), alaska.precision(_), hawaii.precision(_);
+ return reset();
+ };
+
+ albersUsa.scale = function(_) {
+ if (!arguments.length) return lower48.scale();
+ lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
+ return albersUsa.translate(lower48.translate());
+ };
+
+ albersUsa.translate = function(_) {
+ if (!arguments.length) return lower48.translate();
+ var k = lower48.scale(), x = +_[0], y = +_[1];
+
+ lower48Point = lower48
+ .translate(_)
+ .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
+ .stream(pointStream);
+
+ alaskaPoint = alaska
+ .translate([x - 0.307 * k, y + 0.201 * k])
+ .clipExtent([[x - 0.425 * k + epsilon$1, y + 0.120 * k + epsilon$1], [x - 0.214 * k - epsilon$1, y + 0.234 * k - epsilon$1]])
+ .stream(pointStream);
+
+ hawaiiPoint = hawaii
+ .translate([x - 0.205 * k, y + 0.212 * k])
+ .clipExtent([[x - 0.214 * k + epsilon$1, y + 0.166 * k + epsilon$1], [x - 0.115 * k - epsilon$1, y + 0.234 * k - epsilon$1]])
+ .stream(pointStream);
+
+ return reset();
+ };
+
+ albersUsa.fitExtent = function(extent, object) {
+ return fitExtent(albersUsa, extent, object);
+ };
+
+ albersUsa.fitSize = function(size, object) {
+ return fitSize(albersUsa, size, object);
+ };
+
+ albersUsa.fitWidth = function(width, object) {
+ return fitWidth(albersUsa, width, object);
+ };
+
+ albersUsa.fitHeight = function(height, object) {
+ return fitHeight(albersUsa, height, object);
+ };
+
+ function reset() {
+ cache = cacheStream = null;
+ return albersUsa;
+ }
+
+ return albersUsa.scale(1070);
+}
+
+function azimuthalRaw(scale) {
+ return function(x, y) {
+ var cx = cos$1(x),
+ cy = cos$1(y),
+ k = scale(cx * cy);
+ if (k === Infinity) return [2, 0];
+ return [
+ k * cy * sin$1(x),
+ k * sin$1(y)
+ ];
+ }
+}
+
+function azimuthalInvert(angle) {
+ return function(x, y) {
+ var z = sqrt$2(x * x + y * y),
+ c = angle(z),
+ sc = sin$1(c),
+ cc = cos$1(c);
+ return [
+ atan2$1(x * sc, z * cc),
+ asin$1(z && y * sc / z)
+ ];
+ }
+}
+
+var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
+ return sqrt$2(2 / (1 + cxcy));
+});
+
+azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
+ return 2 * asin$1(z / 2);
+});
+
+function azimuthalEqualArea() {
+ return projection(azimuthalEqualAreaRaw)
+ .scale(124.75)
+ .clipAngle(180 - 1e-3);
+}
+
+var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
+ return (c = acos$1(c)) && c / sin$1(c);
+});
+
+azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
+ return z;
+});
+
+function azimuthalEquidistant() {
+ return projection(azimuthalEquidistantRaw)
+ .scale(79.4188)
+ .clipAngle(180 - 1e-3);
+}
+
+function mercatorRaw(lambda, phi) {
+ return [lambda, log$1(tan((halfPi$1 + phi) / 2))];
+}
+
+mercatorRaw.invert = function(x, y) {
+ return [x, 2 * atan(exp(y)) - halfPi$1];
+};
+
+function mercator() {
+ return mercatorProjection(mercatorRaw)
+ .scale(961 / tau$1);
+}
+
+function mercatorProjection(project) {
+ var m = projection(project),
+ center = m.center,
+ scale = m.scale,
+ translate = m.translate,
+ clipExtent = m.clipExtent,
+ x0 = null, y0, x1, y1; // clip extent
+
+ m.scale = function(_) {
+ return arguments.length ? (scale(_), reclip()) : scale();
+ };
+
+ m.translate = function(_) {
+ return arguments.length ? (translate(_), reclip()) : translate();
+ };
+
+ m.center = function(_) {
+ return arguments.length ? (center(_), reclip()) : center();
+ };
+
+ m.clipExtent = function(_) {
+ return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+ };
+
+ function reclip() {
+ var k = pi$1 * scale(),
+ t = m(rotation(m.rotate()).invert([0, 0]));
+ return clipExtent(x0 == null
+ ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
+ ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
+ : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+ }
+
+ return reclip();
+}
+
+function tany(y) {
+ return tan((halfPi$1 + y) / 2);
+}
+
+function conicConformalRaw(y0, y1) {
+ var cy0 = cos$1(y0),
+ n = y0 === y1 ? sin$1(y0) : log$1(cy0 / cos$1(y1)) / log$1(tany(y1) / tany(y0)),
+ f = cy0 * pow$1(tany(y0), n) / n;
+
+ if (!n) return mercatorRaw;
+
+ function project(x, y) {
+ if (f > 0) { if (y < -halfPi$1 + epsilon$1) y = -halfPi$1 + epsilon$1; }
+ else { if (y > halfPi$1 - epsilon$1) y = halfPi$1 - epsilon$1; }
+ var r = f / pow$1(tany(y), n);
+ return [r * sin$1(n * x), f - r * cos$1(n * x)];
+ }
+
+ project.invert = function(x, y) {
+ var fy = f - y, r = sign$1(n) * sqrt$2(x * x + fy * fy),
+ l = atan2$1(x, abs$1(fy)) * sign$1(fy);
+ if (fy * n < 0)
+ l -= pi$1 * sign$1(x) * sign$1(fy);
+ return [l / n, 2 * atan(pow$1(f / r, 1 / n)) - halfPi$1];
+ };
+
+ return project;
+}
+
+function conicConformal() {
+ return conicProjection(conicConformalRaw)
+ .scale(109.5)
+ .parallels([30, 30]);
+}
+
+function equirectangularRaw(lambda, phi) {
+ return [lambda, phi];
+}
+
+equirectangularRaw.invert = equirectangularRaw;
+
+function equirectangular() {
+ return projection(equirectangularRaw)
+ .scale(152.63);
+}
+
+function conicEquidistantRaw(y0, y1) {
+ var cy0 = cos$1(y0),
+ n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
+ g = cy0 / n + y0;
+
+ if (abs$1(n) < epsilon$1) return equirectangularRaw;
+
+ function project(x, y) {
+ var gy = g - y, nx = n * x;
+ return [gy * sin$1(nx), g - gy * cos$1(nx)];
+ }
+
+ project.invert = function(x, y) {
+ var gy = g - y,
+ l = atan2$1(x, abs$1(gy)) * sign$1(gy);
+ if (gy * n < 0)
+ l -= pi$1 * sign$1(x) * sign$1(gy);
+ return [l / n, g - sign$1(n) * sqrt$2(x * x + gy * gy)];
+ };
+
+ return project;
+}
+
+function conicEquidistant() {
+ return conicProjection(conicEquidistantRaw)
+ .scale(131.154)
+ .center([0, 13.9389]);
+}
+
+var A1 = 1.340264,
+ A2 = -0.081106,
+ A3 = 0.000893,
+ A4 = 0.003796,
+ M = sqrt$2(3) / 2,
+ iterations = 12;
+
+function equalEarthRaw(lambda, phi) {
+ var l = asin$1(M * sin$1(phi)), l2 = l * l, l6 = l2 * l2 * l2;
+ return [
+ lambda * cos$1(l) / (M * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2))),
+ l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2))
+ ];
+}
+
+equalEarthRaw.invert = function(x, y) {
+ var l = y, l2 = l * l, l6 = l2 * l2 * l2;
+ for (var i = 0, delta, fy, fpy; i < iterations; ++i) {
+ fy = l * (A1 + A2 * l2 + l6 * (A3 + A4 * l2)) - y;
+ fpy = A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2);
+ l -= delta = fy / fpy, l2 = l * l, l6 = l2 * l2 * l2;
+ if (abs$1(delta) < epsilon2) break;
+ }
+ return [
+ M * x * (A1 + 3 * A2 * l2 + l6 * (7 * A3 + 9 * A4 * l2)) / cos$1(l),
+ asin$1(sin$1(l) / M)
+ ];
+};
+
+function equalEarth() {
+ return projection(equalEarthRaw)
+ .scale(177.158);
+}
+
+function gnomonicRaw(x, y) {
+ var cy = cos$1(y), k = cos$1(x) * cy;
+ return [cy * sin$1(x) / k, sin$1(y) / k];
+}
+
+gnomonicRaw.invert = azimuthalInvert(atan);
+
+function gnomonic() {
+ return projection(gnomonicRaw)
+ .scale(144.049)
+ .clipAngle(60);
+}
+
+function identity$4() {
+ var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
+ alpha = 0, ca, sa, // angle
+ x0 = null, y0, x1, y1, // clip extent
+ kx = 1, ky = 1,
+ transform = transformer$3({
+ point: function(x, y) {
+ var p = projection([x, y]);
+ this.stream.point(p[0], p[1]);
+ }
+ }),
+ postclip = identity$5,
+ cache,
+ cacheStream;
+
+ function reset() {
+ kx = k * sx;
+ ky = k * sy;
+ cache = cacheStream = null;
+ return projection;
+ }
+
+ function projection (p) {
+ var x = p[0] * kx, y = p[1] * ky;
+ if (alpha) {
+ var t = y * ca - x * sa;
+ x = x * ca + y * sa;
+ y = t;
+ }
+ return [x + tx, y + ty];
+ }
+ projection.invert = function(p) {
+ var x = p[0] - tx, y = p[1] - ty;
+ if (alpha) {
+ var t = y * ca + x * sa;
+ x = x * ca - y * sa;
+ y = t;
+ }
+ return [x / kx, y / ky];
+ };
+ projection.stream = function(stream) {
+ return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+ };
+ projection.postclip = function(_) {
+ return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+ };
+ projection.clipExtent = function(_) {
+ return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$5) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+ };
+ projection.scale = function(_) {
+ return arguments.length ? (k = +_, reset()) : k;
+ };
+ projection.translate = function(_) {
+ return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+ };
+ projection.angle = function(_) {
+ return arguments.length ? (alpha = _ % 360 * radians, sa = sin$1(alpha), ca = cos$1(alpha), reset()) : alpha * degrees;
+ };
+ projection.reflectX = function(_) {
+ return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
+ };
+ projection.reflectY = function(_) {
+ return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+ };
+ projection.fitExtent = function(extent, object) {
+ return fitExtent(projection, extent, object);
+ };
+ projection.fitSize = function(size, object) {
+ return fitSize(projection, size, object);
+ };
+ projection.fitWidth = function(width, object) {
+ return fitWidth(projection, width, object);
+ };
+ projection.fitHeight = function(height, object) {
+ return fitHeight(projection, height, object);
+ };
+
+ return projection;
+}
+
+function naturalEarth1Raw(lambda, phi) {
+ var phi2 = phi * phi, phi4 = phi2 * phi2;
+ return [
+ lambda * (0.8707 - 0.131979 * phi2 + phi4 * (-0.013791 + phi4 * (0.003971 * phi2 - 0.001529 * phi4))),
+ phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4)))
+ ];
+}
+
+naturalEarth1Raw.invert = function(x, y) {
+ var phi = y, i = 25, delta;
+ do {
+ var phi2 = phi * phi, phi4 = phi2 * phi2;
+ phi -= delta = (phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4))) - y) /
+ (1.007226 + phi2 * (0.015085 * 3 + phi4 * (-0.044475 * 7 + 0.028874 * 9 * phi2 - 0.005916 * 11 * phi4)));
+ } while (abs$1(delta) > epsilon$1 && --i > 0);
+ return [
+ x / (0.8707 + (phi2 = phi * phi) * (-0.131979 + phi2 * (-0.013791 + phi2 * phi2 * phi2 * (0.003971 - 0.001529 * phi2)))),
+ phi
+ ];
+};
+
+function naturalEarth1() {
+ return projection(naturalEarth1Raw)
+ .scale(175.295);
+}
+
+function orthographicRaw(x, y) {
+ return [cos$1(y) * sin$1(x), sin$1(y)];
+}
+
+orthographicRaw.invert = azimuthalInvert(asin$1);
+
+function orthographic() {
+ return projection(orthographicRaw)
+ .scale(249.5)
+ .clipAngle(90 + epsilon$1);
+}
+
+function stereographicRaw(x, y) {
+ var cy = cos$1(y), k = 1 + cos$1(x) * cy;
+ return [cy * sin$1(x) / k, sin$1(y) / k];
+}
+
+stereographicRaw.invert = azimuthalInvert(function(z) {
+ return 2 * atan(z);
+});
+
+function stereographic() {
+ return projection(stereographicRaw)
+ .scale(250)
+ .clipAngle(142);
+}
+
+function transverseMercatorRaw(lambda, phi) {
+ return [log$1(tan((halfPi$1 + phi) / 2)), -lambda];
+}
+
+transverseMercatorRaw.invert = function(x, y) {
+ return [-y, 2 * atan(exp(x)) - halfPi$1];
+};
+
+function transverseMercator() {
+ var m = mercatorProjection(transverseMercatorRaw),
+ center = m.center,
+ rotate = m.rotate;
+
+ m.center = function(_) {
+ return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
+ };
+
+ m.rotate = function(_) {
+ return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
+ };
+
+ return rotate([0, 0, 90])
+ .scale(159.155);
+}
+
+function defaultSeparation$1(a, b) {
+ return a.parent === b.parent ? 1 : 2;
+}
+
+function meanX(children) {
+ return children.reduce(meanXReduce, 0) / children.length;
+}
+
+function meanXReduce(x, c) {
+ return x + c.x;
+}
+
+function maxY(children) {
+ return 1 + children.reduce(maxYReduce, 0);
+}
+
+function maxYReduce(y, c) {
+ return Math.max(y, c.y);
+}
+
+function leafLeft(node) {
+ var children;
+ while (children = node.children) node = children[0];
+ return node;
+}
+
+function leafRight(node) {
+ var children;
+ while (children = node.children) node = children[children.length - 1];
+ return node;
+}
+
+function cluster() {
+ var separation = defaultSeparation$1,
+ dx = 1,
+ dy = 1,
+ nodeSize = false;
+
+ function cluster(root) {
+ var previousNode,
+ x = 0;
+
+ // First walk, computing the initial x & y values.
+ root.eachAfter(function(node) {
+ var children = node.children;
+ if (children) {
+ node.x = meanX(children);
+ node.y = maxY(children);
+ } else {
+ node.x = previousNode ? x += separation(node, previousNode) : 0;
+ node.y = 0;
+ previousNode = node;
+ }
+ });
+
+ var left = leafLeft(root),
+ right = leafRight(root),
+ x0 = left.x - separation(left, right) / 2,
+ x1 = right.x + separation(right, left) / 2;
+
+ // Second walk, normalizing x & y to the desired size.
+ return root.eachAfter(nodeSize ? function(node) {
+ node.x = (node.x - root.x) * dx;
+ node.y = (root.y - node.y) * dy;
+ } : function(node) {
+ node.x = (node.x - x0) / (x1 - x0) * dx;
+ node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
+ });
+ }
+
+ cluster.separation = function(x) {
+ return arguments.length ? (separation = x, cluster) : separation;
+ };
+
+ cluster.size = function(x) {
+ return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
+ };
+
+ cluster.nodeSize = function(x) {
+ return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
+ };
+
+ return cluster;
+}
+
+function count(node) {
+ var sum = 0,
+ children = node.children,
+ i = children && children.length;
+ if (!i) sum = 1;
+ else while (--i >= 0) sum += children[i].value;
+ node.value = sum;
+}
+
+function node_count() {
+ return this.eachAfter(count);
+}
+
+function node_each(callback, that) {
+ let index = -1;
+ for (const node of this) {
+ callback.call(that, node, ++index, this);
+ }
+ return this;
+}
+
+function node_eachBefore(callback, that) {
+ var node = this, nodes = [node], children, i, index = -1;
+ while (node = nodes.pop()) {
+ callback.call(that, node, ++index, this);
+ if (children = node.children) {
+ for (i = children.length - 1; i >= 0; --i) {
+ nodes.push(children[i]);
+ }
+ }
+ }
+ return this;
+}
+
+function node_eachAfter(callback, that) {
+ var node = this, nodes = [node], next = [], children, i, n, index = -1;
+ while (node = nodes.pop()) {
+ next.push(node);
+ if (children = node.children) {
+ for (i = 0, n = children.length; i < n; ++i) {
+ nodes.push(children[i]);
+ }
+ }
+ }
+ while (node = next.pop()) {
+ callback.call(that, node, ++index, this);
+ }
+ return this;
+}
+
+function node_find(callback, that) {
+ let index = -1;
+ for (const node of this) {
+ if (callback.call(that, node, ++index, this)) {
+ return node;
+ }
+ }
+}
+
+function node_sum(value) {
+ return this.eachAfter(function(node) {
+ var sum = +value(node.data) || 0,
+ children = node.children,
+ i = children && children.length;
+ while (--i >= 0) sum += children[i].value;
+ node.value = sum;
+ });
+}
+
+function node_sort(compare) {
+ return this.eachBefore(function(node) {
+ if (node.children) {
+ node.children.sort(compare);
+ }
+ });
+}
+
+function node_path(end) {
+ var start = this,
+ ancestor = leastCommonAncestor(start, end),
+ nodes = [start];
+ while (start !== ancestor) {
+ start = start.parent;
+ nodes.push(start);
+ }
+ var k = nodes.length;
+ while (end !== ancestor) {
+ nodes.splice(k, 0, end);
+ end = end.parent;
+ }
+ return nodes;
+}
+
+function leastCommonAncestor(a, b) {
+ if (a === b) return a;
+ var aNodes = a.ancestors(),
+ bNodes = b.ancestors(),
+ c = null;
+ a = aNodes.pop();
+ b = bNodes.pop();
+ while (a === b) {
+ c = a;
+ a = aNodes.pop();
+ b = bNodes.pop();
+ }
+ return c;
+}
+
+function node_ancestors() {
+ var node = this, nodes = [node];
+ while (node = node.parent) {
+ nodes.push(node);
+ }
+ return nodes;
+}
+
+function node_descendants() {
+ return Array.from(this);
+}
+
+function node_leaves() {
+ var leaves = [];
+ this.eachBefore(function(node) {
+ if (!node.children) {
+ leaves.push(node);
+ }
+ });
+ return leaves;
+}
+
+function node_links() {
+ var root = this, links = [];
+ root.each(function(node) {
+ if (node !== root) { // Don’t include the root’s parent, if any.
+ links.push({source: node.parent, target: node});
+ }
+ });
+ return links;
+}
+
+function* node_iterator() {
+ var node = this, current, next = [node], children, i, n;
+ do {
+ current = next.reverse(), next = [];
+ while (node = current.pop()) {
+ yield node;
+ if (children = node.children) {
+ for (i = 0, n = children.length; i < n; ++i) {
+ next.push(children[i]);
+ }
+ }
+ }
+ } while (next.length);
+}
+
+function hierarchy(data, children) {
+ if (data instanceof Map) {
+ data = [undefined, data];
+ if (children === undefined) children = mapChildren;
+ } else if (children === undefined) {
+ children = objectChildren;
+ }
+
+ var root = new Node$1(data),
+ node,
+ nodes = [root],
+ child,
+ childs,
+ i,
+ n;
+
+ while (node = nodes.pop()) {
+ if ((childs = children(node.data)) && (n = (childs = Array.from(childs)).length)) {
+ node.children = childs;
+ for (i = n - 1; i >= 0; --i) {
+ nodes.push(child = childs[i] = new Node$1(childs[i]));
+ child.parent = node;
+ child.depth = node.depth + 1;
+ }
+ }
+ }
+
+ return root.eachBefore(computeHeight);
+}
+
+function node_copy() {
+ return hierarchy(this).eachBefore(copyData);
+}
+
+function objectChildren(d) {
+ return d.children;
+}
+
+function mapChildren(d) {
+ return Array.isArray(d) ? d[1] : null;
+}
+
+function copyData(node) {
+ if (node.data.value !== undefined) node.value = node.data.value;
+ node.data = node.data.data;
+}
+
+function computeHeight(node) {
+ var height = 0;
+ do node.height = height;
+ while ((node = node.parent) && (node.height < ++height));
+}
+
+function Node$1(data) {
+ this.data = data;
+ this.depth =
+ this.height = 0;
+ this.parent = null;
+}
+
+Node$1.prototype = hierarchy.prototype = {
+ constructor: Node$1,
+ count: node_count,
+ each: node_each,
+ eachAfter: node_eachAfter,
+ eachBefore: node_eachBefore,
+ find: node_find,
+ sum: node_sum,
+ sort: node_sort,
+ path: node_path,
+ ancestors: node_ancestors,
+ descendants: node_descendants,
+ leaves: node_leaves,
+ links: node_links,
+ copy: node_copy,
+ [Symbol.iterator]: node_iterator
+};
+
+function optional(f) {
+ return f == null ? null : required(f);
+}
+
+function required(f) {
+ if (typeof f !== "function") throw new Error;
+ return f;
+}
+
+function constantZero() {
+ return 0;
+}
+
+function constant$2(x) {
+ return function() {
+ return x;
+ };
+}
+
+// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use
+const a$1 = 1664525;
+const c$3 = 1013904223;
+const m = 4294967296; // 2^32
+
+function lcg$1() {
+ let s = 1;
+ return () => (s = (a$1 * s + c$3) % m) / m;
+}
+
+function array$1(x) {
+ return typeof x === "object" && "length" in x
+ ? x // Array, TypedArray, NodeList, array-like
+ : Array.from(x); // Map, Set, iterable, string, or anything else
+}
+
+function shuffle(array, random) {
+ let m = array.length,
+ t,
+ i;
+
+ while (m) {
+ i = random() * m-- | 0;
+ t = array[m];
+ array[m] = array[i];
+ array[i] = t;
+ }
+
+ return array;
+}
+
+function enclose(circles) {
+ return packEncloseRandom(circles, lcg$1());
+}
+
+function packEncloseRandom(circles, random) {
+ var i = 0, n = (circles = shuffle(Array.from(circles), random)).length, B = [], p, e;
+
+ while (i < n) {
+ p = circles[i];
+ if (e && enclosesWeak(e, p)) ++i;
+ else e = encloseBasis(B = extendBasis(B, p)), i = 0;
+ }
+
+ return e;
+}
+
+function extendBasis(B, p) {
+ var i, j;
+
+ if (enclosesWeakAll(p, B)) return [p];
+
+ // If we get here then B must have at least one element.
+ for (i = 0; i < B.length; ++i) {
+ if (enclosesNot(p, B[i])
+ && enclosesWeakAll(encloseBasis2(B[i], p), B)) {
+ return [B[i], p];
+ }
+ }
+
+ // If we get here then B must have at least two elements.
+ for (i = 0; i < B.length - 1; ++i) {
+ for (j = i + 1; j < B.length; ++j) {
+ if (enclosesNot(encloseBasis2(B[i], B[j]), p)
+ && enclosesNot(encloseBasis2(B[i], p), B[j])
+ && enclosesNot(encloseBasis2(B[j], p), B[i])
+ && enclosesWeakAll(encloseBasis3(B[i], B[j], p), B)) {
+ return [B[i], B[j], p];
+ }
+ }
+ }
+
+ // If we get here then something is very wrong.
+ throw new Error;
+}
+
+function enclosesNot(a, b) {
+ var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;
+ return dr < 0 || dr * dr < dx * dx + dy * dy;
+}
+
+function enclosesWeak(a, b) {
+ var dr = a.r - b.r + Math.max(a.r, b.r, 1) * 1e-9, dx = b.x - a.x, dy = b.y - a.y;
+ return dr > 0 && dr * dr > dx * dx + dy * dy;
+}
+
+function enclosesWeakAll(a, B) {
+ for (var i = 0; i < B.length; ++i) {
+ if (!enclosesWeak(a, B[i])) {
+ return false;
+ }
+ }
+ return true;
+}
+
+function encloseBasis(B) {
+ switch (B.length) {
+ case 1: return encloseBasis1(B[0]);
+ case 2: return encloseBasis2(B[0], B[1]);
+ case 3: return encloseBasis3(B[0], B[1], B[2]);
+ }
+}
+
+function encloseBasis1(a) {
+ return {
+ x: a.x,
+ y: a.y,
+ r: a.r
+ };
+}
+
+function encloseBasis2(a, b) {
+ var x1 = a.x, y1 = a.y, r1 = a.r,
+ x2 = b.x, y2 = b.y, r2 = b.r,
+ x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
+ l = Math.sqrt(x21 * x21 + y21 * y21);
+ return {
+ x: (x1 + x2 + x21 / l * r21) / 2,
+ y: (y1 + y2 + y21 / l * r21) / 2,
+ r: (l + r1 + r2) / 2
+ };
+}
+
+function encloseBasis3(a, b, c) {
+ var x1 = a.x, y1 = a.y, r1 = a.r,
+ x2 = b.x, y2 = b.y, r2 = b.r,
+ x3 = c.x, y3 = c.y, r3 = c.r,
+ a2 = x1 - x2,
+ a3 = x1 - x3,
+ b2 = y1 - y2,
+ b3 = y1 - y3,
+ c2 = r2 - r1,
+ c3 = r3 - r1,
+ d1 = x1 * x1 + y1 * y1 - r1 * r1,
+ d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,
+ d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,
+ ab = a3 * b2 - a2 * b3,
+ xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,
+ xb = (b3 * c2 - b2 * c3) / ab,
+ ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,
+ yb = (a2 * c3 - a3 * c2) / ab,
+ A = xb * xb + yb * yb - 1,
+ B = 2 * (r1 + xa * xb + ya * yb),
+ C = xa * xa + ya * ya - r1 * r1,
+ r = -(Math.abs(A) > 1e-6 ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);
+ return {
+ x: x1 + xa + xb * r,
+ y: y1 + ya + yb * r,
+ r: r
+ };
+}
+
+function place(b, a, c) {
+ var dx = b.x - a.x, x, a2,
+ dy = b.y - a.y, y, b2,
+ d2 = dx * dx + dy * dy;
+ if (d2) {
+ a2 = a.r + c.r, a2 *= a2;
+ b2 = b.r + c.r, b2 *= b2;
+ if (a2 > b2) {
+ x = (d2 + b2 - a2) / (2 * d2);
+ y = Math.sqrt(Math.max(0, b2 / d2 - x * x));
+ c.x = b.x - x * dx - y * dy;
+ c.y = b.y - x * dy + y * dx;
+ } else {
+ x = (d2 + a2 - b2) / (2 * d2);
+ y = Math.sqrt(Math.max(0, a2 / d2 - x * x));
+ c.x = a.x + x * dx - y * dy;
+ c.y = a.y + x * dy + y * dx;
+ }
+ } else {
+ c.x = a.x + c.r;
+ c.y = a.y;
+ }
+}
+
+function intersects(a, b) {
+ var dr = a.r + b.r - 1e-6, dx = b.x - a.x, dy = b.y - a.y;
+ return dr > 0 && dr * dr > dx * dx + dy * dy;
+}
+
+function score(node) {
+ var a = node._,
+ b = node.next._,
+ ab = a.r + b.r,
+ dx = (a.x * b.r + b.x * a.r) / ab,
+ dy = (a.y * b.r + b.y * a.r) / ab;
+ return dx * dx + dy * dy;
+}
+
+function Node(circle) {
+ this._ = circle;
+ this.next = null;
+ this.previous = null;
+}
+
+function packSiblingsRandom(circles, random) {
+ if (!(n = (circles = array$1(circles)).length)) return 0;
+
+ var a, b, c, n, aa, ca, i, j, k, sj, sk;
+
+ // Place the first circle.
+ a = circles[0], a.x = 0, a.y = 0;
+ if (!(n > 1)) return a.r;
+
+ // Place the second circle.
+ b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
+ if (!(n > 2)) return a.r + b.r;
+
+ // Place the third circle.
+ place(b, a, c = circles[2]);
+
+ // Initialize the front-chain using the first three circles a, b and c.
+ a = new Node(a), b = new Node(b), c = new Node(c);
+ a.next = c.previous = b;
+ b.next = a.previous = c;
+ c.next = b.previous = a;
+
+ // Attempt to place each remaining circle…
+ pack: for (i = 3; i < n; ++i) {
+ place(a._, b._, c = circles[i]), c = new Node(c);
+
+ // Find the closest intersecting circle on the front-chain, if any.
+ // “Closeness” is determined by linear distance along the front-chain.
+ // “Ahead” or “behind” is likewise determined by linear distance.
+ j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
+ do {
+ if (sj <= sk) {
+ if (intersects(j._, c._)) {
+ b = j, a.next = b, b.previous = a, --i;
+ continue pack;
+ }
+ sj += j._.r, j = j.next;
+ } else {
+ if (intersects(k._, c._)) {
+ a = k, a.next = b, b.previous = a, --i;
+ continue pack;
+ }
+ sk += k._.r, k = k.previous;
+ }
+ } while (j !== k.next);
+
+ // Success! Insert the new circle c between a and b.
+ c.previous = a, c.next = b, a.next = b.previous = b = c;
+
+ // Compute the new closest circle pair to the centroid.
+ aa = score(a);
+ while ((c = c.next) !== b) {
+ if ((ca = score(c)) < aa) {
+ a = c, aa = ca;
+ }
+ }
+ b = a.next;
+ }
+
+ // Compute the enclosing circle of the front chain.
+ a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = packEncloseRandom(a, random);
+
+ // Translate the circles to put the enclosing circle around the origin.
+ for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;
+
+ return c.r;
+}
+
+function siblings(circles) {
+ packSiblingsRandom(circles, lcg$1());
+ return circles;
+}
+
+function defaultRadius(d) {
+ return Math.sqrt(d.value);
+}
+
+function index$1() {
+ var radius = null,
+ dx = 1,
+ dy = 1,
+ padding = constantZero;
+
+ function pack(root) {
+ const random = lcg$1();
+ root.x = dx / 2, root.y = dy / 2;
+ if (radius) {
+ root.eachBefore(radiusLeaf(radius))
+ .eachAfter(packChildrenRandom(padding, 0.5, random))
+ .eachBefore(translateChild(1));
+ } else {
+ root.eachBefore(radiusLeaf(defaultRadius))
+ .eachAfter(packChildrenRandom(constantZero, 1, random))
+ .eachAfter(packChildrenRandom(padding, root.r / Math.min(dx, dy), random))
+ .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
+ }
+ return root;
+ }
+
+ pack.radius = function(x) {
+ return arguments.length ? (radius = optional(x), pack) : radius;
+ };
+
+ pack.size = function(x) {
+ return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
+ };
+
+ pack.padding = function(x) {
+ return arguments.length ? (padding = typeof x === "function" ? x : constant$2(+x), pack) : padding;
+ };
+
+ return pack;
+}
+
+function radiusLeaf(radius) {
+ return function(node) {
+ if (!node.children) {
+ node.r = Math.max(0, +radius(node) || 0);
+ }
+ };
+}
+
+function packChildrenRandom(padding, k, random) {
+ return function(node) {
+ if (children = node.children) {
+ var children,
+ i,
+ n = children.length,
+ r = padding(node) * k || 0,
+ e;
+
+ if (r) for (i = 0; i < n; ++i) children[i].r += r;
+ e = packSiblingsRandom(children, random);
+ if (r) for (i = 0; i < n; ++i) children[i].r -= r;
+ node.r = e + r;
+ }
+ };
+}
+
+function translateChild(k) {
+ return function(node) {
+ var parent = node.parent;
+ node.r *= k;
+ if (parent) {
+ node.x = parent.x + k * node.x;
+ node.y = parent.y + k * node.y;
+ }
+ };
+}
+
+function roundNode(node) {
+ node.x0 = Math.round(node.x0);
+ node.y0 = Math.round(node.y0);
+ node.x1 = Math.round(node.x1);
+ node.y1 = Math.round(node.y1);
+}
+
+function treemapDice(parent, x0, y0, x1, y1) {
+ var nodes = parent.children,
+ node,
+ i = -1,
+ n = nodes.length,
+ k = parent.value && (x1 - x0) / parent.value;
+
+ while (++i < n) {
+ node = nodes[i], node.y0 = y0, node.y1 = y1;
+ node.x0 = x0, node.x1 = x0 += node.value * k;
+ }
+}
+
+function partition() {
+ var dx = 1,
+ dy = 1,
+ padding = 0,
+ round = false;
+
+ function partition(root) {
+ var n = root.height + 1;
+ root.x0 =
+ root.y0 = padding;
+ root.x1 = dx;
+ root.y1 = dy / n;
+ root.eachBefore(positionNode(dy, n));
+ if (round) root.eachBefore(roundNode);
+ return root;
+ }
+
+ function positionNode(dy, n) {
+ return function(node) {
+ if (node.children) {
+ treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
+ }
+ var x0 = node.x0,
+ y0 = node.y0,
+ x1 = node.x1 - padding,
+ y1 = node.y1 - padding;
+ if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+ if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+ node.x0 = x0;
+ node.y0 = y0;
+ node.x1 = x1;
+ node.y1 = y1;
+ };
+ }
+
+ partition.round = function(x) {
+ return arguments.length ? (round = !!x, partition) : round;
+ };
+
+ partition.size = function(x) {
+ return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
+ };
+
+ partition.padding = function(x) {
+ return arguments.length ? (padding = +x, partition) : padding;
+ };
+
+ return partition;
+}
+
+var preroot = {depth: -1},
+ ambiguous = {},
+ imputed = {};
+
+function defaultId(d) {
+ return d.id;
+}
+
+function defaultParentId(d) {
+ return d.parentId;
+}
+
+function stratify() {
+ var id = defaultId,
+ parentId = defaultParentId,
+ path;
+
+ function stratify(data) {
+ var nodes = Array.from(data),
+ currentId = id,
+ currentParentId = parentId,
+ n,
+ d,
+ i,
+ root,
+ parent,
+ node,
+ nodeId,
+ nodeKey,
+ nodeByKey = new Map;
+
+ if (path != null) {
+ const I = nodes.map((d, i) => normalize$1(path(d, i, data)));
+ const P = I.map(parentof);
+ const S = new Set(I).add("");
+ for (const i of P) {
+ if (!S.has(i)) {
+ S.add(i);
+ I.push(i);
+ P.push(parentof(i));
+ nodes.push(imputed);
+ }
+ }
+ currentId = (_, i) => I[i];
+ currentParentId = (_, i) => P[i];
+ }
+
+ for (i = 0, n = nodes.length; i < n; ++i) {
+ d = nodes[i], node = nodes[i] = new Node$1(d);
+ if ((nodeId = currentId(d, i, data)) != null && (nodeId += "")) {
+ nodeKey = node.id = nodeId;
+ nodeByKey.set(nodeKey, nodeByKey.has(nodeKey) ? ambiguous : node);
+ }
+ if ((nodeId = currentParentId(d, i, data)) != null && (nodeId += "")) {
+ node.parent = nodeId;
+ }
+ }
+
+ for (i = 0; i < n; ++i) {
+ node = nodes[i];
+ if (nodeId = node.parent) {
+ parent = nodeByKey.get(nodeId);
+ if (!parent) throw new Error("missing: " + nodeId);
+ if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
+ if (parent.children) parent.children.push(node);
+ else parent.children = [node];
+ node.parent = parent;
+ } else {
+ if (root) throw new Error("multiple roots");
+ root = node;
+ }
+ }
+
+ if (!root) throw new Error("no root");
+
+ // When imputing internal nodes, only introduce roots if needed.
+ // Then replace the imputed marker data with null.
+ if (path != null) {
+ while (root.data === imputed && root.children.length === 1) {
+ root = root.children[0], --n;
+ }
+ for (let i = nodes.length - 1; i >= 0; --i) {
+ node = nodes[i];
+ if (node.data !== imputed) break;
+ node.data = null;
+ }
+ }
+
+ root.parent = preroot;
+ root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);
+ root.parent = null;
+ if (n > 0) throw new Error("cycle");
+
+ return root;
+ }
+
+ stratify.id = function(x) {
+ return arguments.length ? (id = optional(x), stratify) : id;
+ };
+
+ stratify.parentId = function(x) {
+ return arguments.length ? (parentId = optional(x), stratify) : parentId;
+ };
+
+ stratify.path = function(x) {
+ return arguments.length ? (path = optional(x), stratify) : path;
+ };
+
+ return stratify;
+}
+
+// To normalize a path, we coerce to a string, strip the trailing slash if any
+// (as long as the trailing slash is not immediately preceded by another slash),
+// and add leading slash if missing.
+function normalize$1(path) {
+ path = `${path}`;
+ let i = path.length;
+ if (slash(path, i - 1) && !slash(path, i - 2)) path = path.slice(0, -1);
+ return path[0] === "/" ? path : `/${path}`;
+}
+
+// Walk backwards to find the first slash that is not the leading slash, e.g.:
+// "/foo/bar" ⇥ "/foo", "/foo" ⇥ "/", "/" ↦ "". (The root is special-cased
+// because the id of the root must be a truthy value.)
+function parentof(path) {
+ let i = path.length;
+ if (i < 2) return "";
+ while (--i > 1) if (slash(path, i)) break;
+ return path.slice(0, i);
+}
+
+// Slashes can be escaped; to determine whether a slash is a path delimiter, we
+// count the number of preceding backslashes escaping the forward slash: an odd
+// number indicates an escaped forward slash.
+function slash(path, i) {
+ if (path[i] === "/") {
+ let k = 0;
+ while (i > 0 && path[--i] === "\\") ++k;
+ if ((k & 1) === 0) return true;
+ }
+ return false;
+}
+
+function defaultSeparation(a, b) {
+ return a.parent === b.parent ? 1 : 2;
+}
+
+// function radialSeparation(a, b) {
+// return (a.parent === b.parent ? 1 : 2) / a.depth;
+// }
+
+// This function is used to traverse the left contour of a subtree (or
+// subforest). It returns the successor of v on this contour. This successor is
+// either given by the leftmost child of v or by the thread of v. The function
+// returns null if and only if v is on the highest level of its subtree.
+function nextLeft(v) {
+ var children = v.children;
+ return children ? children[0] : v.t;
+}
+
+// This function works analogously to nextLeft.
+function nextRight(v) {
+ var children = v.children;
+ return children ? children[children.length - 1] : v.t;
+}
+
+// Shifts the current subtree rooted at w+. This is done by increasing
+// prelim(w+) and mod(w+) by shift.
+function moveSubtree(wm, wp, shift) {
+ var change = shift / (wp.i - wm.i);
+ wp.c -= change;
+ wp.s += shift;
+ wm.c += change;
+ wp.z += shift;
+ wp.m += shift;
+}
+
+// All other shifts, applied to the smaller subtrees between w- and w+, are
+// performed by this function. To prepare the shifts, we have to adjust
+// change(w+), shift(w+), and change(w-).
+function executeShifts(v) {
+ var shift = 0,
+ change = 0,
+ children = v.children,
+ i = children.length,
+ w;
+ while (--i >= 0) {
+ w = children[i];
+ w.z += shift;
+ w.m += shift;
+ shift += w.s + (change += w.c);
+ }
+}
+
+// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
+// returns the specified (default) ancestor.
+function nextAncestor(vim, v, ancestor) {
+ return vim.a.parent === v.parent ? vim.a : ancestor;
+}
+
+function TreeNode(node, i) {
+ this._ = node;
+ this.parent = null;
+ this.children = null;
+ this.A = null; // default ancestor
+ this.a = this; // ancestor
+ this.z = 0; // prelim
+ this.m = 0; // mod
+ this.c = 0; // change
+ this.s = 0; // shift
+ this.t = null; // thread
+ this.i = i; // number
+}
+
+TreeNode.prototype = Object.create(Node$1.prototype);
+
+function treeRoot(root) {
+ var tree = new TreeNode(root, 0),
+ node,
+ nodes = [tree],
+ child,
+ children,
+ i,
+ n;
+
+ while (node = nodes.pop()) {
+ if (children = node._.children) {
+ node.children = new Array(n = children.length);
+ for (i = n - 1; i >= 0; --i) {
+ nodes.push(child = node.children[i] = new TreeNode(children[i], i));
+ child.parent = node;
+ }
+ }
+ }
+
+ (tree.parent = new TreeNode(null, 0)).children = [tree];
+ return tree;
+}
+
+// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
+function tree() {
+ var separation = defaultSeparation,
+ dx = 1,
+ dy = 1,
+ nodeSize = null;
+
+ function tree(root) {
+ var t = treeRoot(root);
+
+ // Compute the layout using Buchheim et al.’s algorithm.
+ t.eachAfter(firstWalk), t.parent.m = -t.z;
+ t.eachBefore(secondWalk);
+
+ // If a fixed node size is specified, scale x and y.
+ if (nodeSize) root.eachBefore(sizeNode);
+
+ // If a fixed tree size is specified, scale x and y based on the extent.
+ // Compute the left-most, right-most, and depth-most nodes for extents.
+ else {
+ var left = root,
+ right = root,
+ bottom = root;
+ root.eachBefore(function(node) {
+ if (node.x < left.x) left = node;
+ if (node.x > right.x) right = node;
+ if (node.depth > bottom.depth) bottom = node;
+ });
+ var s = left === right ? 1 : separation(left, right) / 2,
+ tx = s - left.x,
+ kx = dx / (right.x + s + tx),
+ ky = dy / (bottom.depth || 1);
+ root.eachBefore(function(node) {
+ node.x = (node.x + tx) * kx;
+ node.y = node.depth * ky;
+ });
+ }
+
+ return root;
+ }
+
+ // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
+ // applied recursively to the children of v, as well as the function
+ // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
+ // node v is placed to the midpoint of its outermost children.
+ function firstWalk(v) {
+ var children = v.children,
+ siblings = v.parent.children,
+ w = v.i ? siblings[v.i - 1] : null;
+ if (children) {
+ executeShifts(v);
+ var midpoint = (children[0].z + children[children.length - 1].z) / 2;
+ if (w) {
+ v.z = w.z + separation(v._, w._);
+ v.m = v.z - midpoint;
+ } else {
+ v.z = midpoint;
+ }
+ } else if (w) {
+ v.z = w.z + separation(v._, w._);
+ }
+ v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
+ }
+
+ // Computes all real x-coordinates by summing up the modifiers recursively.
+ function secondWalk(v) {
+ v._.x = v.z + v.parent.m;
+ v.m += v.parent.m;
+ }
+
+ // The core of the algorithm. Here, a new subtree is combined with the
+ // previous subtrees. Threads are used to traverse the inside and outside
+ // contours of the left and right subtree up to the highest common level. The
+ // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
+ // superscript o means outside and i means inside, the subscript - means left
+ // subtree and + means right subtree. For summing up the modifiers along the
+ // contour, we use respective variables si+, si-, so-, and so+. Whenever two
+ // nodes of the inside contours conflict, we compute the left one of the
+ // greatest uncommon ancestors using the function ANCESTOR and call MOVE
+ // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
+ // Finally, we add a new thread (if necessary).
+ function apportion(v, w, ancestor) {
+ if (w) {
+ var vip = v,
+ vop = v,
+ vim = w,
+ vom = vip.parent.children[0],
+ sip = vip.m,
+ sop = vop.m,
+ sim = vim.m,
+ som = vom.m,
+ shift;
+ while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
+ vom = nextLeft(vom);
+ vop = nextRight(vop);
+ vop.a = v;
+ shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
+ if (shift > 0) {
+ moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
+ sip += shift;
+ sop += shift;
+ }
+ sim += vim.m;
+ sip += vip.m;
+ som += vom.m;
+ sop += vop.m;
+ }
+ if (vim && !nextRight(vop)) {
+ vop.t = vim;
+ vop.m += sim - sop;
+ }
+ if (vip && !nextLeft(vom)) {
+ vom.t = vip;
+ vom.m += sip - som;
+ ancestor = v;
+ }
+ }
+ return ancestor;
+ }
+
+ function sizeNode(node) {
+ node.x *= dx;
+ node.y = node.depth * dy;
+ }
+
+ tree.separation = function(x) {
+ return arguments.length ? (separation = x, tree) : separation;
+ };
+
+ tree.size = function(x) {
+ return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
+ };
+
+ tree.nodeSize = function(x) {
+ return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
+ };
+
+ return tree;
+}
+
+function treemapSlice(parent, x0, y0, x1, y1) {
+ var nodes = parent.children,
+ node,
+ i = -1,
+ n = nodes.length,
+ k = parent.value && (y1 - y0) / parent.value;
+
+ while (++i < n) {
+ node = nodes[i], node.x0 = x0, node.x1 = x1;
+ node.y0 = y0, node.y1 = y0 += node.value * k;
+ }
+}
+
+var phi = (1 + Math.sqrt(5)) / 2;
+
+function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
+ var rows = [],
+ nodes = parent.children,
+ row,
+ nodeValue,
+ i0 = 0,
+ i1 = 0,
+ n = nodes.length,
+ dx, dy,
+ value = parent.value,
+ sumValue,
+ minValue,
+ maxValue,
+ newRatio,
+ minRatio,
+ alpha,
+ beta;
+
+ while (i0 < n) {
+ dx = x1 - x0, dy = y1 - y0;
+
+ // Find the next non-empty node.
+ do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
+ minValue = maxValue = sumValue;
+ alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
+ beta = sumValue * sumValue * alpha;
+ minRatio = Math.max(maxValue / beta, beta / minValue);
+
+ // Keep adding nodes while the aspect ratio maintains or improves.
+ for (; i1 < n; ++i1) {
+ sumValue += nodeValue = nodes[i1].value;
+ if (nodeValue < minValue) minValue = nodeValue;
+ if (nodeValue > maxValue) maxValue = nodeValue;
+ beta = sumValue * sumValue * alpha;
+ newRatio = Math.max(maxValue / beta, beta / minValue);
+ if (newRatio > minRatio) { sumValue -= nodeValue; break; }
+ minRatio = newRatio;
+ }
+
+ // Position and record the row orientation.
+ rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
+ if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
+ else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
+ value -= sumValue, i0 = i1;
+ }
+
+ return rows;
+}
+
+var squarify = (function custom(ratio) {
+
+ function squarify(parent, x0, y0, x1, y1) {
+ squarifyRatio(ratio, parent, x0, y0, x1, y1);
+ }
+
+ squarify.ratio = function(x) {
+ return custom((x = +x) > 1 ? x : 1);
+ };
+
+ return squarify;
+})(phi);
+
+function index() {
+ var tile = squarify,
+ round = false,
+ dx = 1,
+ dy = 1,
+ paddingStack = [0],
+ paddingInner = constantZero,
+ paddingTop = constantZero,
+ paddingRight = constantZero,
+ paddingBottom = constantZero,
+ paddingLeft = constantZero;
+
+ function treemap(root) {
+ root.x0 =
+ root.y0 = 0;
+ root.x1 = dx;
+ root.y1 = dy;
+ root.eachBefore(positionNode);
+ paddingStack = [0];
+ if (round) root.eachBefore(roundNode);
+ return root;
+ }
+
+ function positionNode(node) {
+ var p = paddingStack[node.depth],
+ x0 = node.x0 + p,
+ y0 = node.y0 + p,
+ x1 = node.x1 - p,
+ y1 = node.y1 - p;
+ if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+ if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+ node.x0 = x0;
+ node.y0 = y0;
+ node.x1 = x1;
+ node.y1 = y1;
+ if (node.children) {
+ p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
+ x0 += paddingLeft(node) - p;
+ y0 += paddingTop(node) - p;
+ x1 -= paddingRight(node) - p;
+ y1 -= paddingBottom(node) - p;
+ if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+ if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+ tile(node, x0, y0, x1, y1);
+ }
+ }
+
+ treemap.round = function(x) {
+ return arguments.length ? (round = !!x, treemap) : round;
+ };
+
+ treemap.size = function(x) {
+ return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
+ };
+
+ treemap.tile = function(x) {
+ return arguments.length ? (tile = required(x), treemap) : tile;
+ };
+
+ treemap.padding = function(x) {
+ return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
+ };
+
+ treemap.paddingInner = function(x) {
+ return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$2(+x), treemap) : paddingInner;
+ };
+
+ treemap.paddingOuter = function(x) {
+ return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
+ };
+
+ treemap.paddingTop = function(x) {
+ return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$2(+x), treemap) : paddingTop;
+ };
+
+ treemap.paddingRight = function(x) {
+ return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$2(+x), treemap) : paddingRight;
+ };
+
+ treemap.paddingBottom = function(x) {
+ return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$2(+x), treemap) : paddingBottom;
+ };
+
+ treemap.paddingLeft = function(x) {
+ return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$2(+x), treemap) : paddingLeft;
+ };
+
+ return treemap;
+}
+
+function binary(parent, x0, y0, x1, y1) {
+ var nodes = parent.children,
+ i, n = nodes.length,
+ sum, sums = new Array(n + 1);
+
+ for (sums[0] = sum = i = 0; i < n; ++i) {
+ sums[i + 1] = sum += nodes[i].value;
+ }
+
+ partition(0, n, parent.value, x0, y0, x1, y1);
+
+ function partition(i, j, value, x0, y0, x1, y1) {
+ if (i >= j - 1) {
+ var node = nodes[i];
+ node.x0 = x0, node.y0 = y0;
+ node.x1 = x1, node.y1 = y1;
+ return;
+ }
+
+ var valueOffset = sums[i],
+ valueTarget = (value / 2) + valueOffset,
+ k = i + 1,
+ hi = j - 1;
+
+ while (k < hi) {
+ var mid = k + hi >>> 1;
+ if (sums[mid] < valueTarget) k = mid + 1;
+ else hi = mid;
+ }
+
+ if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;
+
+ var valueLeft = sums[k] - valueOffset,
+ valueRight = value - valueLeft;
+
+ if ((x1 - x0) > (y1 - y0)) {
+ var xk = value ? (x0 * valueRight + x1 * valueLeft) / value : x1;
+ partition(i, k, valueLeft, x0, y0, xk, y1);
+ partition(k, j, valueRight, xk, y0, x1, y1);
+ } else {
+ var yk = value ? (y0 * valueRight + y1 * valueLeft) / value : y1;
+ partition(i, k, valueLeft, x0, y0, x1, yk);
+ partition(k, j, valueRight, x0, yk, x1, y1);
+ }
+ }
+}
+
+function sliceDice(parent, x0, y0, x1, y1) {
+ (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
+}
+
+var resquarify = (function custom(ratio) {
+
+ function resquarify(parent, x0, y0, x1, y1) {
+ if ((rows = parent._squarify) && (rows.ratio === ratio)) {
+ var rows,
+ row,
+ nodes,
+ i,
+ j = -1,
+ n,
+ m = rows.length,
+ value = parent.value;
+
+ while (++j < m) {
+ row = rows[j], nodes = row.children;
+ for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
+ if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += (y1 - y0) * row.value / value : y1);
+ else treemapSlice(row, x0, y0, value ? x0 += (x1 - x0) * row.value / value : x1, y1);
+ value -= row.value;
+ }
+ } else {
+ parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
+ rows.ratio = ratio;
+ }
+ }
+
+ resquarify.ratio = function(x) {
+ return custom((x = +x) > 1 ? x : 1);
+ };
+
+ return resquarify;
+})(phi);
+
+function area$1(polygon) {
+ var i = -1,
+ n = polygon.length,
+ a,
+ b = polygon[n - 1],
+ area = 0;
+
+ while (++i < n) {
+ a = b;
+ b = polygon[i];
+ area += a[1] * b[0] - a[0] * b[1];
+ }
+
+ return area / 2;
+}
+
+function centroid(polygon) {
+ var i = -1,
+ n = polygon.length,
+ x = 0,
+ y = 0,
+ a,
+ b = polygon[n - 1],
+ c,
+ k = 0;
+
+ while (++i < n) {
+ a = b;
+ b = polygon[i];
+ k += c = a[0] * b[1] - b[0] * a[1];
+ x += (a[0] + b[0]) * c;
+ y += (a[1] + b[1]) * c;
+ }
+
+ return k *= 3, [x / k, y / k];
+}
+
+// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+// negative if clockwise, and zero if the points are collinear.
+function cross$1(a, b, c) {
+ return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+}
+
+function lexicographicOrder(a, b) {
+ return a[0] - b[0] || a[1] - b[1];
+}
+
+// Computes the upper convex hull per the monotone chain algorithm.
+// Assumes points.length >= 3, is sorted by x, unique in y.
+// Returns an array of indices into points in left-to-right order.
+function computeUpperHullIndexes(points) {
+ const n = points.length,
+ indexes = [0, 1];
+ let size = 2, i;
+
+ for (i = 2; i < n; ++i) {
+ while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
+ indexes[size++] = i;
+ }
+
+ return indexes.slice(0, size); // remove popped points
+}
+
+function hull(points) {
+ if ((n = points.length) < 3) return null;
+
+ var i,
+ n,
+ sortedPoints = new Array(n),
+ flippedPoints = new Array(n);
+
+ for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
+ sortedPoints.sort(lexicographicOrder);
+ for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+
+ var upperIndexes = computeUpperHullIndexes(sortedPoints),
+ lowerIndexes = computeUpperHullIndexes(flippedPoints);
+
+ // Construct the hull polygon, removing possible duplicate endpoints.
+ var skipLeft = lowerIndexes[0] === upperIndexes[0],
+ skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+ hull = [];
+
+ // Add upper hull in right-to-l order.
+ // Then add lower hull in left-to-right order.
+ for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+ for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+
+ return hull;
+}
+
+function contains(polygon, point) {
+ var n = polygon.length,
+ p = polygon[n - 1],
+ x = point[0], y = point[1],
+ x0 = p[0], y0 = p[1],
+ x1, y1,
+ inside = false;
+
+ for (var i = 0; i < n; ++i) {
+ p = polygon[i], x1 = p[0], y1 = p[1];
+ if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
+ x0 = x1, y0 = y1;
+ }
+
+ return inside;
+}
+
+function length(polygon) {
+ var i = -1,
+ n = polygon.length,
+ b = polygon[n - 1],
+ xa,
+ ya,
+ xb = b[0],
+ yb = b[1],
+ perimeter = 0;
+
+ while (++i < n) {
+ xa = xb;
+ ya = yb;
+ b = polygon[i];
+ xb = b[0];
+ yb = b[1];
+ xa -= xb;
+ ya -= yb;
+ perimeter += Math.hypot(xa, ya);
+ }
+
+ return perimeter;
+}
+
+var defaultSource = Math.random;
+
+var uniform = (function sourceRandomUniform(source) {
+ function randomUniform(min, max) {
+ min = min == null ? 0 : +min;
+ max = max == null ? 1 : +max;
+ if (arguments.length === 1) max = min, min = 0;
+ else max -= min;
+ return function() {
+ return source() * max + min;
+ };
+ }
+
+ randomUniform.source = sourceRandomUniform;
+
+ return randomUniform;
+})(defaultSource);
+
+var int = (function sourceRandomInt(source) {
+ function randomInt(min, max) {
+ if (arguments.length < 2) max = min, min = 0;
+ min = Math.floor(min);
+ max = Math.floor(max) - min;
+ return function() {
+ return Math.floor(source() * max + min);
+ };
+ }
+
+ randomInt.source = sourceRandomInt;
+
+ return randomInt;
+})(defaultSource);
+
+var normal = (function sourceRandomNormal(source) {
+ function randomNormal(mu, sigma) {
+ var x, r;
+ mu = mu == null ? 0 : +mu;
+ sigma = sigma == null ? 1 : +sigma;
+ return function() {
+ var y;
+
+ // If available, use the second previously-generated uniform random.
+ if (x != null) y = x, x = null;
+
+ // Otherwise, generate a new x and y.
+ else do {
+ x = source() * 2 - 1;
+ y = source() * 2 - 1;
+ r = x * x + y * y;
+ } while (!r || r > 1);
+
+ return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
+ };
+ }
+
+ randomNormal.source = sourceRandomNormal;
+
+ return randomNormal;
+})(defaultSource);
+
+var logNormal = (function sourceRandomLogNormal(source) {
+ var N = normal.source(source);
+
+ function randomLogNormal() {
+ var randomNormal = N.apply(this, arguments);
+ return function() {
+ return Math.exp(randomNormal());
+ };
+ }
+
+ randomLogNormal.source = sourceRandomLogNormal;
+
+ return randomLogNormal;
+})(defaultSource);
+
+var irwinHall = (function sourceRandomIrwinHall(source) {
+ function randomIrwinHall(n) {
+ if ((n = +n) <= 0) return () => 0;
+ return function() {
+ for (var sum = 0, i = n; i > 1; --i) sum += source();
+ return sum + i * source();
+ };
+ }
+
+ randomIrwinHall.source = sourceRandomIrwinHall;
+
+ return randomIrwinHall;
+})(defaultSource);
+
+var bates = (function sourceRandomBates(source) {
+ var I = irwinHall.source(source);
+
+ function randomBates(n) {
+ // use limiting distribution at n === 0
+ if ((n = +n) === 0) return source;
+ var randomIrwinHall = I(n);
+ return function() {
+ return randomIrwinHall() / n;
+ };
+ }
+
+ randomBates.source = sourceRandomBates;
+
+ return randomBates;
+})(defaultSource);
+
+var exponential = (function sourceRandomExponential(source) {
+ function randomExponential(lambda) {
+ return function() {
+ return -Math.log1p(-source()) / lambda;
+ };
+ }
+
+ randomExponential.source = sourceRandomExponential;
+
+ return randomExponential;
+})(defaultSource);
+
+var pareto = (function sourceRandomPareto(source) {
+ function randomPareto(alpha) {
+ if ((alpha = +alpha) < 0) throw new RangeError("invalid alpha");
+ alpha = 1 / -alpha;
+ return function() {
+ return Math.pow(1 - source(), alpha);
+ };
+ }
+
+ randomPareto.source = sourceRandomPareto;
+
+ return randomPareto;
+})(defaultSource);
+
+var bernoulli = (function sourceRandomBernoulli(source) {
+ function randomBernoulli(p) {
+ if ((p = +p) < 0 || p > 1) throw new RangeError("invalid p");
+ return function() {
+ return Math.floor(source() + p);
+ };
+ }
+
+ randomBernoulli.source = sourceRandomBernoulli;
+
+ return randomBernoulli;
+})(defaultSource);
+
+var geometric = (function sourceRandomGeometric(source) {
+ function randomGeometric(p) {
+ if ((p = +p) < 0 || p > 1) throw new RangeError("invalid p");
+ if (p === 0) return () => Infinity;
+ if (p === 1) return () => 1;
+ p = Math.log1p(-p);
+ return function() {
+ return 1 + Math.floor(Math.log1p(-source()) / p);
+ };
+ }
+
+ randomGeometric.source = sourceRandomGeometric;
+
+ return randomGeometric;
+})(defaultSource);
+
+var gamma = (function sourceRandomGamma(source) {
+ var randomNormal = normal.source(source)();
+
+ function randomGamma(k, theta) {
+ if ((k = +k) < 0) throw new RangeError("invalid k");
+ // degenerate distribution if k === 0
+ if (k === 0) return () => 0;
+ theta = theta == null ? 1 : +theta;
+ // exponential distribution if k === 1
+ if (k === 1) return () => -Math.log1p(-source()) * theta;
+
+ var d = (k < 1 ? k + 1 : k) - 1 / 3,
+ c = 1 / (3 * Math.sqrt(d)),
+ multiplier = k < 1 ? () => Math.pow(source(), 1 / k) : () => 1;
+ return function() {
+ do {
+ do {
+ var x = randomNormal(),
+ v = 1 + c * x;
+ } while (v <= 0);
+ v *= v * v;
+ var u = 1 - source();
+ } while (u >= 1 - 0.0331 * x * x * x * x && Math.log(u) >= 0.5 * x * x + d * (1 - v + Math.log(v)));
+ return d * v * multiplier() * theta;
+ };
+ }
+
+ randomGamma.source = sourceRandomGamma;
+
+ return randomGamma;
+})(defaultSource);
+
+var beta = (function sourceRandomBeta(source) {
+ var G = gamma.source(source);
+
+ function randomBeta(alpha, beta) {
+ var X = G(alpha),
+ Y = G(beta);
+ return function() {
+ var x = X();
+ return x === 0 ? 0 : x / (x + Y());
+ };
+ }
+
+ randomBeta.source = sourceRandomBeta;
+
+ return randomBeta;
+})(defaultSource);
+
+var binomial = (function sourceRandomBinomial(source) {
+ var G = geometric.source(source),
+ B = beta.source(source);
+
+ function randomBinomial(n, p) {
+ n = +n;
+ if ((p = +p) >= 1) return () => n;
+ if (p <= 0) return () => 0;
+ return function() {
+ var acc = 0, nn = n, pp = p;
+ while (nn * pp > 16 && nn * (1 - pp) > 16) {
+ var i = Math.floor((nn + 1) * pp),
+ y = B(i, nn - i + 1)();
+ if (y <= pp) {
+ acc += i;
+ nn -= i;
+ pp = (pp - y) / (1 - y);
+ } else {
+ nn = i - 1;
+ pp /= y;
+ }
+ }
+ var sign = pp < 0.5,
+ pFinal = sign ? pp : 1 - pp,
+ g = G(pFinal);
+ for (var s = g(), k = 0; s <= nn; ++k) s += g();
+ return acc + (sign ? k : nn - k);
+ };
+ }
+
+ randomBinomial.source = sourceRandomBinomial;
+
+ return randomBinomial;
+})(defaultSource);
+
+var weibull = (function sourceRandomWeibull(source) {
+ function randomWeibull(k, a, b) {
+ var outerFunc;
+ if ((k = +k) === 0) {
+ outerFunc = x => -Math.log(x);
+ } else {
+ k = 1 / k;
+ outerFunc = x => Math.pow(x, k);
+ }
+ a = a == null ? 0 : +a;
+ b = b == null ? 1 : +b;
+ return function() {
+ return a + b * outerFunc(-Math.log1p(-source()));
+ };
+ }
+
+ randomWeibull.source = sourceRandomWeibull;
+
+ return randomWeibull;
+})(defaultSource);
+
+var cauchy = (function sourceRandomCauchy(source) {
+ function randomCauchy(a, b) {
+ a = a == null ? 0 : +a;
+ b = b == null ? 1 : +b;
+ return function() {
+ return a + b * Math.tan(Math.PI * source());
+ };
+ }
+
+ randomCauchy.source = sourceRandomCauchy;
+
+ return randomCauchy;
+})(defaultSource);
+
+var logistic = (function sourceRandomLogistic(source) {
+ function randomLogistic(a, b) {
+ a = a == null ? 0 : +a;
+ b = b == null ? 1 : +b;
+ return function() {
+ var u = source();
+ return a + b * Math.log(u / (1 - u));
+ };
+ }
+
+ randomLogistic.source = sourceRandomLogistic;
+
+ return randomLogistic;
+})(defaultSource);
+
+var poisson = (function sourceRandomPoisson(source) {
+ var G = gamma.source(source),
+ B = binomial.source(source);
+
+ function randomPoisson(lambda) {
+ return function() {
+ var acc = 0, l = lambda;
+ while (l > 16) {
+ var n = Math.floor(0.875 * l),
+ t = G(n)();
+ if (t > l) return acc + B(n - 1, l / t)();
+ acc += n;
+ l -= t;
+ }
+ for (var s = -Math.log1p(-source()), k = 0; s <= l; ++k) s -= Math.log1p(-source());
+ return acc + k;
+ };
+ }
+
+ randomPoisson.source = sourceRandomPoisson;
+
+ return randomPoisson;
+})(defaultSource);
+
+// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use
+const mul = 0x19660D;
+const inc = 0x3C6EF35F;
+const eps = 1 / 0x100000000;
+
+function lcg(seed = Math.random()) {
+ let state = (0 <= seed && seed < 1 ? seed / eps : Math.abs(seed)) | 0;
+ return () => (state = mul * state + inc | 0, eps * (state >>> 0));
+}
+
+function initRange(domain, range) {
+ switch (arguments.length) {
+ case 0: break;
+ case 1: this.range(domain); break;
+ default: this.range(range).domain(domain); break;
+ }
+ return this;
+}
+
+function initInterpolator(domain, interpolator) {
+ switch (arguments.length) {
+ case 0: break;
+ case 1: {
+ if (typeof domain === "function") this.interpolator(domain);
+ else this.range(domain);
+ break;
+ }
+ default: {
+ this.domain(domain);
+ if (typeof interpolator === "function") this.interpolator(interpolator);
+ else this.range(interpolator);
+ break;
+ }
+ }
+ return this;
+}
+
+const implicit = Symbol("implicit");
+
+function ordinal() {
+ var index = new InternMap(),
+ domain = [],
+ range = [],
+ unknown = implicit;
+
+ function scale(d) {
+ let i = index.get(d);
+ if (i === undefined) {
+ if (unknown !== implicit) return unknown;
+ index.set(d, i = domain.push(d) - 1);
+ }
+ return range[i % range.length];
+ }
+
+ scale.domain = function(_) {
+ if (!arguments.length) return domain.slice();
+ domain = [], index = new InternMap();
+ for (const value of _) {
+ if (index.has(value)) continue;
+ index.set(value, domain.push(value) - 1);
+ }
+ return scale;
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (range = Array.from(_), scale) : range.slice();
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ scale.copy = function() {
+ return ordinal(domain, range).unknown(unknown);
+ };
+
+ initRange.apply(scale, arguments);
+
+ return scale;
+}
+
+function band() {
+ var scale = ordinal().unknown(undefined),
+ domain = scale.domain,
+ ordinalRange = scale.range,
+ r0 = 0,
+ r1 = 1,
+ step,
+ bandwidth,
+ round = false,
+ paddingInner = 0,
+ paddingOuter = 0,
+ align = 0.5;
+
+ delete scale.unknown;
+
+ function rescale() {
+ var n = domain().length,
+ reverse = r1 < r0,
+ start = reverse ? r1 : r0,
+ stop = reverse ? r0 : r1;
+ step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
+ if (round) step = Math.floor(step);
+ start += (stop - start - step * (n - paddingInner)) * align;
+ bandwidth = step * (1 - paddingInner);
+ if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
+ var values = range$2(n).map(function(i) { return start + step * i; });
+ return ordinalRange(reverse ? values.reverse() : values);
+ }
+
+ scale.domain = function(_) {
+ return arguments.length ? (domain(_), rescale()) : domain();
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? ([r0, r1] = _, r0 = +r0, r1 = +r1, rescale()) : [r0, r1];
+ };
+
+ scale.rangeRound = function(_) {
+ return [r0, r1] = _, r0 = +r0, r1 = +r1, round = true, rescale();
+ };
+
+ scale.bandwidth = function() {
+ return bandwidth;
+ };
+
+ scale.step = function() {
+ return step;
+ };
+
+ scale.round = function(_) {
+ return arguments.length ? (round = !!_, rescale()) : round;
+ };
+
+ scale.padding = function(_) {
+ return arguments.length ? (paddingInner = Math.min(1, paddingOuter = +_), rescale()) : paddingInner;
+ };
+
+ scale.paddingInner = function(_) {
+ return arguments.length ? (paddingInner = Math.min(1, _), rescale()) : paddingInner;
+ };
+
+ scale.paddingOuter = function(_) {
+ return arguments.length ? (paddingOuter = +_, rescale()) : paddingOuter;
+ };
+
+ scale.align = function(_) {
+ return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
+ };
+
+ scale.copy = function() {
+ return band(domain(), [r0, r1])
+ .round(round)
+ .paddingInner(paddingInner)
+ .paddingOuter(paddingOuter)
+ .align(align);
+ };
+
+ return initRange.apply(rescale(), arguments);
+}
+
+function pointish(scale) {
+ var copy = scale.copy;
+
+ scale.padding = scale.paddingOuter;
+ delete scale.paddingInner;
+ delete scale.paddingOuter;
+
+ scale.copy = function() {
+ return pointish(copy());
+ };
+
+ return scale;
+}
+
+function point$4() {
+ return pointish(band.apply(null, arguments).paddingInner(1));
+}
+
+function constants(x) {
+ return function() {
+ return x;
+ };
+}
+
+function number$1(x) {
+ return +x;
+}
+
+var unit = [0, 1];
+
+function identity$3(x) {
+ return x;
+}
+
+function normalize(a, b) {
+ return (b -= (a = +a))
+ ? function(x) { return (x - a) / b; }
+ : constants(isNaN(b) ? NaN : 0.5);
+}
+
+function clamper(a, b) {
+ var t;
+ if (a > b) t = a, a = b, b = t;
+ return function(x) { return Math.max(a, Math.min(b, x)); };
+}
+
+// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
+function bimap(domain, range, interpolate) {
+ var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
+ if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);
+ else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+ return function(x) { return r0(d0(x)); };
+}
+
+function polymap(domain, range, interpolate) {
+ var j = Math.min(domain.length, range.length) - 1,
+ d = new Array(j),
+ r = new Array(j),
+ i = -1;
+
+ // Reverse descending domains.
+ if (domain[j] < domain[0]) {
+ domain = domain.slice().reverse();
+ range = range.slice().reverse();
+ }
+
+ while (++i < j) {
+ d[i] = normalize(domain[i], domain[i + 1]);
+ r[i] = interpolate(range[i], range[i + 1]);
+ }
+
+ return function(x) {
+ var i = bisect(domain, x, 1, j) - 1;
+ return r[i](d[i](x));
+ };
+}
+
+function copy$1(source, target) {
+ return target
+ .domain(source.domain())
+ .range(source.range())
+ .interpolate(source.interpolate())
+ .clamp(source.clamp())
+ .unknown(source.unknown());
+}
+
+function transformer$2() {
+ var domain = unit,
+ range = unit,
+ interpolate = interpolate$2,
+ transform,
+ untransform,
+ unknown,
+ clamp = identity$3,
+ piecewise,
+ output,
+ input;
+
+ function rescale() {
+ var n = Math.min(domain.length, range.length);
+ if (clamp !== identity$3) clamp = clamper(domain[0], domain[n - 1]);
+ piecewise = n > 2 ? polymap : bimap;
+ output = input = null;
+ return scale;
+ }
+
+ function scale(x) {
+ return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+ }
+
+ scale.invert = function(y) {
+ return clamp(untransform((input || (input = piecewise(range, domain.map(transform), interpolateNumber)))(y)));
+ };
+
+ scale.domain = function(_) {
+ return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+ };
+
+ scale.rangeRound = function(_) {
+ return range = Array.from(_), interpolate = interpolateRound, rescale();
+ };
+
+ scale.clamp = function(_) {
+ return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
+ };
+
+ scale.interpolate = function(_) {
+ return arguments.length ? (interpolate = _, rescale()) : interpolate;
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ return function(t, u) {
+ transform = t, untransform = u;
+ return rescale();
+ };
+}
+
+function continuous() {
+ return transformer$2()(identity$3, identity$3);
+}
+
+function tickFormat(start, stop, count, specifier) {
+ var step = tickStep(start, stop, count),
+ precision;
+ specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+ switch (specifier.type) {
+ case "s": {
+ var value = Math.max(Math.abs(start), Math.abs(stop));
+ if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+ return exports.formatPrefix(specifier, value);
+ }
+ case "":
+ case "e":
+ case "g":
+ case "p":
+ case "r": {
+ if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+ break;
+ }
+ case "f":
+ case "%": {
+ if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+ break;
+ }
+ }
+ return exports.format(specifier);
+}
+
+function linearish(scale) {
+ var domain = scale.domain;
+
+ scale.ticks = function(count) {
+ var d = domain();
+ return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+ };
+
+ scale.tickFormat = function(count, specifier) {
+ var d = domain();
+ return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+ };
+
+ scale.nice = function(count) {
+ if (count == null) count = 10;
+
+ var d = domain();
+ var i0 = 0;
+ var i1 = d.length - 1;
+ var start = d[i0];
+ var stop = d[i1];
+ var prestep;
+ var step;
+ var maxIter = 10;
+
+ if (stop < start) {
+ step = start, start = stop, stop = step;
+ step = i0, i0 = i1, i1 = step;
+ }
+
+ while (maxIter-- > 0) {
+ step = tickIncrement(start, stop, count);
+ if (step === prestep) {
+ d[i0] = start;
+ d[i1] = stop;
+ return domain(d);
+ } else if (step > 0) {
+ start = Math.floor(start / step) * step;
+ stop = Math.ceil(stop / step) * step;
+ } else if (step < 0) {
+ start = Math.ceil(start * step) / step;
+ stop = Math.floor(stop * step) / step;
+ } else {
+ break;
+ }
+ prestep = step;
+ }
+
+ return scale;
+ };
+
+ return scale;
+}
+
+function linear() {
+ var scale = continuous();
+
+ scale.copy = function() {
+ return copy$1(scale, linear());
+ };
+
+ initRange.apply(scale, arguments);
+
+ return linearish(scale);
+}
+
+function identity$2(domain) {
+ var unknown;
+
+ function scale(x) {
+ return x == null || isNaN(x = +x) ? unknown : x;
+ }
+
+ scale.invert = scale;
+
+ scale.domain = scale.range = function(_) {
+ return arguments.length ? (domain = Array.from(_, number$1), scale) : domain.slice();
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ scale.copy = function() {
+ return identity$2(domain).unknown(unknown);
+ };
+
+ domain = arguments.length ? Array.from(domain, number$1) : [0, 1];
+
+ return linearish(scale);
+}
+
+function nice(domain, interval) {
+ domain = domain.slice();
+
+ var i0 = 0,
+ i1 = domain.length - 1,
+ x0 = domain[i0],
+ x1 = domain[i1],
+ t;
+
+ if (x1 < x0) {
+ t = i0, i0 = i1, i1 = t;
+ t = x0, x0 = x1, x1 = t;
+ }
+
+ domain[i0] = interval.floor(x0);
+ domain[i1] = interval.ceil(x1);
+ return domain;
+}
+
+function transformLog(x) {
+ return Math.log(x);
+}
+
+function transformExp(x) {
+ return Math.exp(x);
+}
+
+function transformLogn(x) {
+ return -Math.log(-x);
+}
+
+function transformExpn(x) {
+ return -Math.exp(-x);
+}
+
+function pow10(x) {
+ return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
+}
+
+function powp(base) {
+ return base === 10 ? pow10
+ : base === Math.E ? Math.exp
+ : x => Math.pow(base, x);
+}
+
+function logp(base) {
+ return base === Math.E ? Math.log
+ : base === 10 && Math.log10
+ || base === 2 && Math.log2
+ || (base = Math.log(base), x => Math.log(x) / base);
+}
+
+function reflect(f) {
+ return (x, k) => -f(-x, k);
+}
+
+function loggish(transform) {
+ const scale = transform(transformLog, transformExp);
+ const domain = scale.domain;
+ let base = 10;
+ let logs;
+ let pows;
+
+ function rescale() {
+ logs = logp(base), pows = powp(base);
+ if (domain()[0] < 0) {
+ logs = reflect(logs), pows = reflect(pows);
+ transform(transformLogn, transformExpn);
+ } else {
+ transform(transformLog, transformExp);
+ }
+ return scale;
+ }
+
+ scale.base = function(_) {
+ return arguments.length ? (base = +_, rescale()) : base;
+ };
+
+ scale.domain = function(_) {
+ return arguments.length ? (domain(_), rescale()) : domain();
+ };
+
+ scale.ticks = count => {
+ const d = domain();
+ let u = d[0];
+ let v = d[d.length - 1];
+ const r = v < u;
+
+ if (r) ([u, v] = [v, u]);
+
+ let i = logs(u);
+ let j = logs(v);
+ let k;
+ let t;
+ const n = count == null ? 10 : +count;
+ let z = [];
+
+ if (!(base % 1) && j - i < n) {
+ i = Math.floor(i), j = Math.ceil(j);
+ if (u > 0) for (; i <= j; ++i) {
+ for (k = 1; k < base; ++k) {
+ t = i < 0 ? k / pows(-i) : k * pows(i);
+ if (t < u) continue;
+ if (t > v) break;
+ z.push(t);
+ }
+ } else for (; i <= j; ++i) {
+ for (k = base - 1; k >= 1; --k) {
+ t = i > 0 ? k / pows(-i) : k * pows(i);
+ if (t < u) continue;
+ if (t > v) break;
+ z.push(t);
+ }
+ }
+ if (z.length * 2 < n) z = ticks(u, v, n);
+ } else {
+ z = ticks(i, j, Math.min(j - i, n)).map(pows);
+ }
+ return r ? z.reverse() : z;
+ };
+
+ scale.tickFormat = (count, specifier) => {
+ if (count == null) count = 10;
+ if (specifier == null) specifier = base === 10 ? "s" : ",";
+ if (typeof specifier !== "function") {
+ if (!(base % 1) && (specifier = formatSpecifier(specifier)).precision == null) specifier.trim = true;
+ specifier = exports.format(specifier);
+ }
+ if (count === Infinity) return specifier;
+ const k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
+ return d => {
+ let i = d / pows(Math.round(logs(d)));
+ if (i * base < base - 0.5) i *= base;
+ return i <= k ? specifier(d) : "";
+ };
+ };
+
+ scale.nice = () => {
+ return domain(nice(domain(), {
+ floor: x => pows(Math.floor(logs(x))),
+ ceil: x => pows(Math.ceil(logs(x)))
+ }));
+ };
+
+ return scale;
+}
+
+function log() {
+ const scale = loggish(transformer$2()).domain([1, 10]);
+ scale.copy = () => copy$1(scale, log()).base(scale.base());
+ initRange.apply(scale, arguments);
+ return scale;
+}
+
+function transformSymlog(c) {
+ return function(x) {
+ return Math.sign(x) * Math.log1p(Math.abs(x / c));
+ };
+}
+
+function transformSymexp(c) {
+ return function(x) {
+ return Math.sign(x) * Math.expm1(Math.abs(x)) * c;
+ };
+}
+
+function symlogish(transform) {
+ var c = 1, scale = transform(transformSymlog(c), transformSymexp(c));
+
+ scale.constant = function(_) {
+ return arguments.length ? transform(transformSymlog(c = +_), transformSymexp(c)) : c;
+ };
+
+ return linearish(scale);
+}
+
+function symlog() {
+ var scale = symlogish(transformer$2());
+
+ scale.copy = function() {
+ return copy$1(scale, symlog()).constant(scale.constant());
+ };
+
+ return initRange.apply(scale, arguments);
+}
+
+function transformPow(exponent) {
+ return function(x) {
+ return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
+ };
+}
+
+function transformSqrt(x) {
+ return x < 0 ? -Math.sqrt(-x) : Math.sqrt(x);
+}
+
+function transformSquare(x) {
+ return x < 0 ? -x * x : x * x;
+}
+
+function powish(transform) {
+ var scale = transform(identity$3, identity$3),
+ exponent = 1;
+
+ function rescale() {
+ return exponent === 1 ? transform(identity$3, identity$3)
+ : exponent === 0.5 ? transform(transformSqrt, transformSquare)
+ : transform(transformPow(exponent), transformPow(1 / exponent));
+ }
+
+ scale.exponent = function(_) {
+ return arguments.length ? (exponent = +_, rescale()) : exponent;
+ };
+
+ return linearish(scale);
+}
+
+function pow() {
+ var scale = powish(transformer$2());
+
+ scale.copy = function() {
+ return copy$1(scale, pow()).exponent(scale.exponent());
+ };
+
+ initRange.apply(scale, arguments);
+
+ return scale;
+}
+
+function sqrt$1() {
+ return pow.apply(null, arguments).exponent(0.5);
+}
+
+function square$1(x) {
+ return Math.sign(x) * x * x;
+}
+
+function unsquare(x) {
+ return Math.sign(x) * Math.sqrt(Math.abs(x));
+}
+
+function radial() {
+ var squared = continuous(),
+ range = [0, 1],
+ round = false,
+ unknown;
+
+ function scale(x) {
+ var y = unsquare(squared(x));
+ return isNaN(y) ? unknown : round ? Math.round(y) : y;
+ }
+
+ scale.invert = function(y) {
+ return squared.invert(square$1(y));
+ };
+
+ scale.domain = function(_) {
+ return arguments.length ? (squared.domain(_), scale) : squared.domain();
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (squared.range((range = Array.from(_, number$1)).map(square$1)), scale) : range.slice();
+ };
+
+ scale.rangeRound = function(_) {
+ return scale.range(_).round(true);
+ };
+
+ scale.round = function(_) {
+ return arguments.length ? (round = !!_, scale) : round;
+ };
+
+ scale.clamp = function(_) {
+ return arguments.length ? (squared.clamp(_), scale) : squared.clamp();
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ scale.copy = function() {
+ return radial(squared.domain(), range)
+ .round(round)
+ .clamp(squared.clamp())
+ .unknown(unknown);
+ };
+
+ initRange.apply(scale, arguments);
+
+ return linearish(scale);
+}
+
+function quantile() {
+ var domain = [],
+ range = [],
+ thresholds = [],
+ unknown;
+
+ function rescale() {
+ var i = 0, n = Math.max(1, range.length);
+ thresholds = new Array(n - 1);
+ while (++i < n) thresholds[i - 1] = quantileSorted(domain, i / n);
+ return scale;
+ }
+
+ function scale(x) {
+ return x == null || isNaN(x = +x) ? unknown : range[bisect(thresholds, x)];
+ }
+
+ scale.invertExtent = function(y) {
+ var i = range.indexOf(y);
+ return i < 0 ? [NaN, NaN] : [
+ i > 0 ? thresholds[i - 1] : domain[0],
+ i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
+ ];
+ };
+
+ scale.domain = function(_) {
+ if (!arguments.length) return domain.slice();
+ domain = [];
+ for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d);
+ domain.sort(ascending$3);
+ return rescale();
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ scale.quantiles = function() {
+ return thresholds.slice();
+ };
+
+ scale.copy = function() {
+ return quantile()
+ .domain(domain)
+ .range(range)
+ .unknown(unknown);
+ };
+
+ return initRange.apply(scale, arguments);
+}
+
+function quantize() {
+ var x0 = 0,
+ x1 = 1,
+ n = 1,
+ domain = [0.5],
+ range = [0, 1],
+ unknown;
+
+ function scale(x) {
+ return x != null && x <= x ? range[bisect(domain, x, 0, n)] : unknown;
+ }
+
+ function rescale() {
+ var i = -1;
+ domain = new Array(n);
+ while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+ return scale;
+ }
+
+ scale.domain = function(_) {
+ return arguments.length ? ([x0, x1] = _, x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+ };
+
+ scale.invertExtent = function(y) {
+ var i = range.indexOf(y);
+ return i < 0 ? [NaN, NaN]
+ : i < 1 ? [x0, domain[0]]
+ : i >= n ? [domain[n - 1], x1]
+ : [domain[i - 1], domain[i]];
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : scale;
+ };
+
+ scale.thresholds = function() {
+ return domain.slice();
+ };
+
+ scale.copy = function() {
+ return quantize()
+ .domain([x0, x1])
+ .range(range)
+ .unknown(unknown);
+ };
+
+ return initRange.apply(linearish(scale), arguments);
+}
+
+function threshold() {
+ var domain = [0.5],
+ range = [0, 1],
+ unknown,
+ n = 1;
+
+ function scale(x) {
+ return x != null && x <= x ? range[bisect(domain, x, 0, n)] : unknown;
+ }
+
+ scale.domain = function(_) {
+ return arguments.length ? (domain = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();
+ };
+
+ scale.range = function(_) {
+ return arguments.length ? (range = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();
+ };
+
+ scale.invertExtent = function(y) {
+ var i = range.indexOf(y);
+ return [domain[i - 1], domain[i]];
+ };
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ scale.copy = function() {
+ return threshold()
+ .domain(domain)
+ .range(range)
+ .unknown(unknown);
+ };
+
+ return initRange.apply(scale, arguments);
+}
+
+const t0 = new Date, t1 = new Date;
+
+function timeInterval(floori, offseti, count, field) {
+
+ function interval(date) {
+ return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;
+ }
+
+ interval.floor = (date) => {
+ return floori(date = new Date(+date)), date;
+ };
+
+ interval.ceil = (date) => {
+ return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
+ };
+
+ interval.round = (date) => {
+ const d0 = interval(date), d1 = interval.ceil(date);
+ return date - d0 < d1 - date ? d0 : d1;
+ };
+
+ interval.offset = (date, step) => {
+ return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
+ };
+
+ interval.range = (start, stop, step) => {
+ const range = [];
+ start = interval.ceil(start);
+ step = step == null ? 1 : Math.floor(step);
+ if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
+ let previous;
+ do range.push(previous = new Date(+start)), offseti(start, step), floori(start);
+ while (previous < start && start < stop);
+ return range;
+ };
+
+ interval.filter = (test) => {
+ return timeInterval((date) => {
+ if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
+ }, (date, step) => {
+ if (date >= date) {
+ if (step < 0) while (++step <= 0) {
+ while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
+ } else while (--step >= 0) {
+ while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
+ }
+ }
+ });
+ };
+
+ if (count) {
+ interval.count = (start, end) => {
+ t0.setTime(+start), t1.setTime(+end);
+ floori(t0), floori(t1);
+ return Math.floor(count(t0, t1));
+ };
+
+ interval.every = (step) => {
+ step = Math.floor(step);
+ return !isFinite(step) || !(step > 0) ? null
+ : !(step > 1) ? interval
+ : interval.filter(field
+ ? (d) => field(d) % step === 0
+ : (d) => interval.count(0, d) % step === 0);
+ };
+ }
+
+ return interval;
+}
+
+const millisecond = timeInterval(() => {
+ // noop
+}, (date, step) => {
+ date.setTime(+date + step);
+}, (start, end) => {
+ return end - start;
+});
+
+// An optimized implementation for this simple case.
+millisecond.every = (k) => {
+ k = Math.floor(k);
+ if (!isFinite(k) || !(k > 0)) return null;
+ if (!(k > 1)) return millisecond;
+ return timeInterval((date) => {
+ date.setTime(Math.floor(date / k) * k);
+ }, (date, step) => {
+ date.setTime(+date + step * k);
+ }, (start, end) => {
+ return (end - start) / k;
+ });
+};
+
+const milliseconds = millisecond.range;
+
+const durationSecond = 1000;
+const durationMinute = durationSecond * 60;
+const durationHour = durationMinute * 60;
+const durationDay = durationHour * 24;
+const durationWeek = durationDay * 7;
+const durationMonth = durationDay * 30;
+const durationYear = durationDay * 365;
+
+const second = timeInterval((date) => {
+ date.setTime(date - date.getMilliseconds());
+}, (date, step) => {
+ date.setTime(+date + step * durationSecond);
+}, (start, end) => {
+ return (end - start) / durationSecond;
+}, (date) => {
+ return date.getUTCSeconds();
+});
+
+const seconds = second.range;
+
+const timeMinute = timeInterval((date) => {
+ date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond);
+}, (date, step) => {
+ date.setTime(+date + step * durationMinute);
+}, (start, end) => {
+ return (end - start) / durationMinute;
+}, (date) => {
+ return date.getMinutes();
+});
+
+const timeMinutes = timeMinute.range;
+
+const utcMinute = timeInterval((date) => {
+ date.setUTCSeconds(0, 0);
+}, (date, step) => {
+ date.setTime(+date + step * durationMinute);
+}, (start, end) => {
+ return (end - start) / durationMinute;
+}, (date) => {
+ return date.getUTCMinutes();
+});
+
+const utcMinutes = utcMinute.range;
+
+const timeHour = timeInterval((date) => {
+ date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);
+}, (date, step) => {
+ date.setTime(+date + step * durationHour);
+}, (start, end) => {
+ return (end - start) / durationHour;
+}, (date) => {
+ return date.getHours();
+});
+
+const timeHours = timeHour.range;
+
+const utcHour = timeInterval((date) => {
+ date.setUTCMinutes(0, 0, 0);
+}, (date, step) => {
+ date.setTime(+date + step * durationHour);
+}, (start, end) => {
+ return (end - start) / durationHour;
+}, (date) => {
+ return date.getUTCHours();
+});
+
+const utcHours = utcHour.range;
+
+const timeDay = timeInterval(
+ date => date.setHours(0, 0, 0, 0),
+ (date, step) => date.setDate(date.getDate() + step),
+ (start, end) => (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay,
+ date => date.getDate() - 1
+);
+
+const timeDays = timeDay.range;
+
+const utcDay = timeInterval((date) => {
+ date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+ return (end - start) / durationDay;
+}, (date) => {
+ return date.getUTCDate() - 1;
+});
+
+const utcDays = utcDay.range;
+
+const unixDay = timeInterval((date) => {
+ date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+ return (end - start) / durationDay;
+}, (date) => {
+ return Math.floor(date / durationDay);
+});
+
+const unixDays = unixDay.range;
+
+function timeWeekday(i) {
+ return timeInterval((date) => {
+ date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
+ date.setHours(0, 0, 0, 0);
+ }, (date, step) => {
+ date.setDate(date.getDate() + step * 7);
+ }, (start, end) => {
+ return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
+ });
+}
+
+const timeSunday = timeWeekday(0);
+const timeMonday = timeWeekday(1);
+const timeTuesday = timeWeekday(2);
+const timeWednesday = timeWeekday(3);
+const timeThursday = timeWeekday(4);
+const timeFriday = timeWeekday(5);
+const timeSaturday = timeWeekday(6);
+
+const timeSundays = timeSunday.range;
+const timeMondays = timeMonday.range;
+const timeTuesdays = timeTuesday.range;
+const timeWednesdays = timeWednesday.range;
+const timeThursdays = timeThursday.range;
+const timeFridays = timeFriday.range;
+const timeSaturdays = timeSaturday.range;
+
+function utcWeekday(i) {
+ return timeInterval((date) => {
+ date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
+ date.setUTCHours(0, 0, 0, 0);
+ }, (date, step) => {
+ date.setUTCDate(date.getUTCDate() + step * 7);
+ }, (start, end) => {
+ return (end - start) / durationWeek;
+ });
+}
+
+const utcSunday = utcWeekday(0);
+const utcMonday = utcWeekday(1);
+const utcTuesday = utcWeekday(2);
+const utcWednesday = utcWeekday(3);
+const utcThursday = utcWeekday(4);
+const utcFriday = utcWeekday(5);
+const utcSaturday = utcWeekday(6);
+
+const utcSundays = utcSunday.range;
+const utcMondays = utcMonday.range;
+const utcTuesdays = utcTuesday.range;
+const utcWednesdays = utcWednesday.range;
+const utcThursdays = utcThursday.range;
+const utcFridays = utcFriday.range;
+const utcSaturdays = utcSaturday.range;
+
+const timeMonth = timeInterval((date) => {
+ date.setDate(1);
+ date.setHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setMonth(date.getMonth() + step);
+}, (start, end) => {
+ return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
+}, (date) => {
+ return date.getMonth();
+});
+
+const timeMonths = timeMonth.range;
+
+const utcMonth = timeInterval((date) => {
+ date.setUTCDate(1);
+ date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setUTCMonth(date.getUTCMonth() + step);
+}, (start, end) => {
+ return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, (date) => {
+ return date.getUTCMonth();
+});
+
+const utcMonths = utcMonth.range;
+
+const timeYear = timeInterval((date) => {
+ date.setMonth(0, 1);
+ date.setHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setFullYear(date.getFullYear() + step);
+}, (start, end) => {
+ return end.getFullYear() - start.getFullYear();
+}, (date) => {
+ return date.getFullYear();
+});
+
+// An optimized implementation for this simple case.
+timeYear.every = (k) => {
+ return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
+ date.setFullYear(Math.floor(date.getFullYear() / k) * k);
+ date.setMonth(0, 1);
+ date.setHours(0, 0, 0, 0);
+ }, (date, step) => {
+ date.setFullYear(date.getFullYear() + step * k);
+ });
+};
+
+const timeYears = timeYear.range;
+
+const utcYear = timeInterval((date) => {
+ date.setUTCMonth(0, 1);
+ date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+ date.setUTCFullYear(date.getUTCFullYear() + step);
+}, (start, end) => {
+ return end.getUTCFullYear() - start.getUTCFullYear();
+}, (date) => {
+ return date.getUTCFullYear();
+});
+
+// An optimized implementation for this simple case.
+utcYear.every = (k) => {
+ return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
+ date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
+ date.setUTCMonth(0, 1);
+ date.setUTCHours(0, 0, 0, 0);
+ }, (date, step) => {
+ date.setUTCFullYear(date.getUTCFullYear() + step * k);
+ });
+};
+
+const utcYears = utcYear.range;
+
+function ticker(year, month, week, day, hour, minute) {
+
+ const tickIntervals = [
+ [second, 1, durationSecond],
+ [second, 5, 5 * durationSecond],
+ [second, 15, 15 * durationSecond],
+ [second, 30, 30 * durationSecond],
+ [minute, 1, durationMinute],
+ [minute, 5, 5 * durationMinute],
+ [minute, 15, 15 * durationMinute],
+ [minute, 30, 30 * durationMinute],
+ [ hour, 1, durationHour ],
+ [ hour, 3, 3 * durationHour ],
+ [ hour, 6, 6 * durationHour ],
+ [ hour, 12, 12 * durationHour ],
+ [ day, 1, durationDay ],
+ [ day, 2, 2 * durationDay ],
+ [ week, 1, durationWeek ],
+ [ month, 1, durationMonth ],
+ [ month, 3, 3 * durationMonth ],
+ [ year, 1, durationYear ]
+ ];
+
+ function ticks(start, stop, count) {
+ const reverse = stop < start;
+ if (reverse) [start, stop] = [stop, start];
+ const interval = count && typeof count.range === "function" ? count : tickInterval(start, stop, count);
+ const ticks = interval ? interval.range(start, +stop + 1) : []; // inclusive stop
+ return reverse ? ticks.reverse() : ticks;
+ }
+
+ function tickInterval(start, stop, count) {
+ const target = Math.abs(stop - start) / count;
+ const i = bisector(([,, step]) => step).right(tickIntervals, target);
+ if (i === tickIntervals.length) return year.every(tickStep(start / durationYear, stop / durationYear, count));
+ if (i === 0) return millisecond.every(Math.max(tickStep(start, stop, count), 1));
+ const [t, step] = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
+ return t.every(step);
+ }
+
+ return [ticks, tickInterval];
+}
+
+const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, unixDay, utcHour, utcMinute);
+const [timeTicks, timeTickInterval] = ticker(timeYear, timeMonth, timeSunday, timeDay, timeHour, timeMinute);
+
+function localDate(d) {
+ if (0 <= d.y && d.y < 100) {
+ var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
+ date.setFullYear(d.y);
+ return date;
+ }
+ return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
+}
+
+function utcDate(d) {
+ if (0 <= d.y && d.y < 100) {
+ var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
+ date.setUTCFullYear(d.y);
+ return date;
+ }
+ return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
+}
+
+function newDate(y, m, d) {
+ return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};
+}
+
+function formatLocale(locale) {
+ var locale_dateTime = locale.dateTime,
+ locale_date = locale.date,
+ locale_time = locale.time,
+ locale_periods = locale.periods,
+ locale_weekdays = locale.days,
+ locale_shortWeekdays = locale.shortDays,
+ locale_months = locale.months,
+ locale_shortMonths = locale.shortMonths;
+
+ var periodRe = formatRe(locale_periods),
+ periodLookup = formatLookup(locale_periods),
+ weekdayRe = formatRe(locale_weekdays),
+ weekdayLookup = formatLookup(locale_weekdays),
+ shortWeekdayRe = formatRe(locale_shortWeekdays),
+ shortWeekdayLookup = formatLookup(locale_shortWeekdays),
+ monthRe = formatRe(locale_months),
+ monthLookup = formatLookup(locale_months),
+ shortMonthRe = formatRe(locale_shortMonths),
+ shortMonthLookup = formatLookup(locale_shortMonths);
+
+ var formats = {
+ "a": formatShortWeekday,
+ "A": formatWeekday,
+ "b": formatShortMonth,
+ "B": formatMonth,
+ "c": null,
+ "d": formatDayOfMonth,
+ "e": formatDayOfMonth,
+ "f": formatMicroseconds,
+ "g": formatYearISO,
+ "G": formatFullYearISO,
+ "H": formatHour24,
+ "I": formatHour12,
+ "j": formatDayOfYear,
+ "L": formatMilliseconds,
+ "m": formatMonthNumber,
+ "M": formatMinutes,
+ "p": formatPeriod,
+ "q": formatQuarter,
+ "Q": formatUnixTimestamp,
+ "s": formatUnixTimestampSeconds,
+ "S": formatSeconds,
+ "u": formatWeekdayNumberMonday,
+ "U": formatWeekNumberSunday,
+ "V": formatWeekNumberISO,
+ "w": formatWeekdayNumberSunday,
+ "W": formatWeekNumberMonday,
+ "x": null,
+ "X": null,
+ "y": formatYear,
+ "Y": formatFullYear,
+ "Z": formatZone,
+ "%": formatLiteralPercent
+ };
+
+ var utcFormats = {
+ "a": formatUTCShortWeekday,
+ "A": formatUTCWeekday,
+ "b": formatUTCShortMonth,
+ "B": formatUTCMonth,
+ "c": null,
+ "d": formatUTCDayOfMonth,
+ "e": formatUTCDayOfMonth,
+ "f": formatUTCMicroseconds,
+ "g": formatUTCYearISO,
+ "G": formatUTCFullYearISO,
+ "H": formatUTCHour24,
+ "I": formatUTCHour12,
+ "j": formatUTCDayOfYear,
+ "L": formatUTCMilliseconds,
+ "m": formatUTCMonthNumber,
+ "M": formatUTCMinutes,
+ "p": formatUTCPeriod,
+ "q": formatUTCQuarter,
+ "Q": formatUnixTimestamp,
+ "s": formatUnixTimestampSeconds,
+ "S": formatUTCSeconds,
+ "u": formatUTCWeekdayNumberMonday,
+ "U": formatUTCWeekNumberSunday,
+ "V": formatUTCWeekNumberISO,
+ "w": formatUTCWeekdayNumberSunday,
+ "W": formatUTCWeekNumberMonday,
+ "x": null,
+ "X": null,
+ "y": formatUTCYear,
+ "Y": formatUTCFullYear,
+ "Z": formatUTCZone,
+ "%": formatLiteralPercent
+ };
+
+ var parses = {
+ "a": parseShortWeekday,
+ "A": parseWeekday,
+ "b": parseShortMonth,
+ "B": parseMonth,
+ "c": parseLocaleDateTime,
+ "d": parseDayOfMonth,
+ "e": parseDayOfMonth,
+ "f": parseMicroseconds,
+ "g": parseYear,
+ "G": parseFullYear,
+ "H": parseHour24,
+ "I": parseHour24,
+ "j": parseDayOfYear,
+ "L": parseMilliseconds,
+ "m": parseMonthNumber,
+ "M": parseMinutes,
+ "p": parsePeriod,
+ "q": parseQuarter,
+ "Q": parseUnixTimestamp,
+ "s": parseUnixTimestampSeconds,
+ "S": parseSeconds,
+ "u": parseWeekdayNumberMonday,
+ "U": parseWeekNumberSunday,
+ "V": parseWeekNumberISO,
+ "w": parseWeekdayNumberSunday,
+ "W": parseWeekNumberMonday,
+ "x": parseLocaleDate,
+ "X": parseLocaleTime,
+ "y": parseYear,
+ "Y": parseFullYear,
+ "Z": parseZone,
+ "%": parseLiteralPercent
+ };
+
+ // These recursive directive definitions must be deferred.
+ formats.x = newFormat(locale_date, formats);
+ formats.X = newFormat(locale_time, formats);
+ formats.c = newFormat(locale_dateTime, formats);
+ utcFormats.x = newFormat(locale_date, utcFormats);
+ utcFormats.X = newFormat(locale_time, utcFormats);
+ utcFormats.c = newFormat(locale_dateTime, utcFormats);
+
+ function newFormat(specifier, formats) {
+ return function(date) {
+ var string = [],
+ i = -1,
+ j = 0,
+ n = specifier.length,
+ c,
+ pad,
+ format;
+
+ if (!(date instanceof Date)) date = new Date(+date);
+
+ while (++i < n) {
+ if (specifier.charCodeAt(i) === 37) {
+ string.push(specifier.slice(j, i));
+ if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
+ else pad = c === "e" ? " " : "0";
+ if (format = formats[c]) c = format(date, pad);
+ string.push(c);
+ j = i + 1;
+ }
+ }
+
+ string.push(specifier.slice(j, i));
+ return string.join("");
+ };
+ }
+
+ function newParse(specifier, Z) {
+ return function(string) {
+ var d = newDate(1900, undefined, 1),
+ i = parseSpecifier(d, specifier, string += "", 0),
+ week, day;
+ if (i != string.length) return null;
+
+ // If a UNIX timestamp is specified, return it.
+ if ("Q" in d) return new Date(d.Q);
+ if ("s" in d) return new Date(d.s * 1000 + ("L" in d ? d.L : 0));
+
+ // If this is utcParse, never use the local timezone.
+ if (Z && !("Z" in d)) d.Z = 0;
+
+ // The am-pm flag is 0 for AM, and 1 for PM.
+ if ("p" in d) d.H = d.H % 12 + d.p * 12;
+
+ // If the month was not specified, inherit from the quarter.
+ if (d.m === undefined) d.m = "q" in d ? d.q : 0;
+
+ // Convert day-of-week and week-of-year to day-of-year.
+ if ("V" in d) {
+ if (d.V < 1 || d.V > 53) return null;
+ if (!("w" in d)) d.w = 1;
+ if ("Z" in d) {
+ week = utcDate(newDate(d.y, 0, 1)), day = week.getUTCDay();
+ week = day > 4 || day === 0 ? utcMonday.ceil(week) : utcMonday(week);
+ week = utcDay.offset(week, (d.V - 1) * 7);
+ d.y = week.getUTCFullYear();
+ d.m = week.getUTCMonth();
+ d.d = week.getUTCDate() + (d.w + 6) % 7;
+ } else {
+ week = localDate(newDate(d.y, 0, 1)), day = week.getDay();
+ week = day > 4 || day === 0 ? timeMonday.ceil(week) : timeMonday(week);
+ week = timeDay.offset(week, (d.V - 1) * 7);
+ d.y = week.getFullYear();
+ d.m = week.getMonth();
+ d.d = week.getDate() + (d.w + 6) % 7;
+ }
+ } else if ("W" in d || "U" in d) {
+ if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
+ day = "Z" in d ? utcDate(newDate(d.y, 0, 1)).getUTCDay() : localDate(newDate(d.y, 0, 1)).getDay();
+ d.m = 0;
+ d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day + 5) % 7 : d.w + d.U * 7 - (day + 6) % 7;
+ }
+
+ // If a time zone is specified, all fields are interpreted as UTC and then
+ // offset according to the specified time zone.
+ if ("Z" in d) {
+ d.H += d.Z / 100 | 0;
+ d.M += d.Z % 100;
+ return utcDate(d);
+ }
+
+ // Otherwise, all fields are in local time.
+ return localDate(d);
+ };
+ }
+
+ function parseSpecifier(d, specifier, string, j) {
+ var i = 0,
+ n = specifier.length,
+ m = string.length,
+ c,
+ parse;
+
+ while (i < n) {
+ if (j >= m) return -1;
+ c = specifier.charCodeAt(i++);
+ if (c === 37) {
+ c = specifier.charAt(i++);
+ parse = parses[c in pads ? specifier.charAt(i++) : c];
+ if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
+ } else if (c != string.charCodeAt(j++)) {
+ return -1;
+ }
+ }
+
+ return j;
+ }
+
+ function parsePeriod(d, string, i) {
+ var n = periodRe.exec(string.slice(i));
+ return n ? (d.p = periodLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
+ }
+
+ function parseShortWeekday(d, string, i) {
+ var n = shortWeekdayRe.exec(string.slice(i));
+ return n ? (d.w = shortWeekdayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
+ }
+
+ function parseWeekday(d, string, i) {
+ var n = weekdayRe.exec(string.slice(i));
+ return n ? (d.w = weekdayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
+ }
+
+ function parseShortMonth(d, string, i) {
+ var n = shortMonthRe.exec(string.slice(i));
+ return n ? (d.m = shortMonthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
+ }
+
+ function parseMonth(d, string, i) {
+ var n = monthRe.exec(string.slice(i));
+ return n ? (d.m = monthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
+ }
+
+ function parseLocaleDateTime(d, string, i) {
+ return parseSpecifier(d, locale_dateTime, string, i);
+ }
+
+ function parseLocaleDate(d, string, i) {
+ return parseSpecifier(d, locale_date, string, i);
+ }
+
+ function parseLocaleTime(d, string, i) {
+ return parseSpecifier(d, locale_time, string, i);
+ }
+
+ function formatShortWeekday(d) {
+ return locale_shortWeekdays[d.getDay()];
+ }
+
+ function formatWeekday(d) {
+ return locale_weekdays[d.getDay()];
+ }
+
+ function formatShortMonth(d) {
+ return locale_shortMonths[d.getMonth()];
+ }
+
+ function formatMonth(d) {
+ return locale_months[d.getMonth()];
+ }
+
+ function formatPeriod(d) {
+ return locale_periods[+(d.getHours() >= 12)];
+ }
+
+ function formatQuarter(d) {
+ return 1 + ~~(d.getMonth() / 3);
+ }
+
+ function formatUTCShortWeekday(d) {
+ return locale_shortWeekdays[d.getUTCDay()];
+ }
+
+ function formatUTCWeekday(d) {
+ return locale_weekdays[d.getUTCDay()];
+ }
+
+ function formatUTCShortMonth(d) {
+ return locale_shortMonths[d.getUTCMonth()];
+ }
+
+ function formatUTCMonth(d) {
+ return locale_months[d.getUTCMonth()];
+ }
+
+ function formatUTCPeriod(d) {
+ return locale_periods[+(d.getUTCHours() >= 12)];
+ }
+
+ function formatUTCQuarter(d) {
+ return 1 + ~~(d.getUTCMonth() / 3);
+ }
+
+ return {
+ format: function(specifier) {
+ var f = newFormat(specifier += "", formats);
+ f.toString = function() { return specifier; };
+ return f;
+ },
+ parse: function(specifier) {
+ var p = newParse(specifier += "", false);
+ p.toString = function() { return specifier; };
+ return p;
+ },
+ utcFormat: function(specifier) {
+ var f = newFormat(specifier += "", utcFormats);
+ f.toString = function() { return specifier; };
+ return f;
+ },
+ utcParse: function(specifier) {
+ var p = newParse(specifier += "", true);
+ p.toString = function() { return specifier; };
+ return p;
+ }
+ };
+}
+
+var pads = {"-": "", "_": " ", "0": "0"},
+ numberRe = /^\s*\d+/, // note: ignores next directive
+ percentRe = /^%/,
+ requoteRe = /[\\^$*+?|[\]().{}]/g;
+
+function pad(value, fill, width) {
+ var sign = value < 0 ? "-" : "",
+ string = (sign ? -value : value) + "",
+ length = string.length;
+ return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
+}
+
+function requote(s) {
+ return s.replace(requoteRe, "\\$&");
+}
+
+function formatRe(names) {
+ return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
+}
+
+function formatLookup(names) {
+ return new Map(names.map((name, i) => [name.toLowerCase(), i]));
+}
+
+function parseWeekdayNumberSunday(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 1));
+ return n ? (d.w = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekdayNumberMonday(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 1));
+ return n ? (d.u = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberSunday(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.U = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberISO(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.V = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberMonday(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.W = +n[0], i + n[0].length) : -1;
+}
+
+function parseFullYear(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 4));
+ return n ? (d.y = +n[0], i + n[0].length) : -1;
+}
+
+function parseYear(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
+}
+
+function parseZone(d, string, i) {
+ var n = /^(Z)|([+-]\d\d)(?::?(\d\d))?/.exec(string.slice(i, i + 6));
+ return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
+}
+
+function parseQuarter(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 1));
+ return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;
+}
+
+function parseMonthNumber(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
+}
+
+function parseDayOfMonth(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseDayOfYear(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 3));
+ return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseHour24(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.H = +n[0], i + n[0].length) : -1;
+}
+
+function parseMinutes(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.M = +n[0], i + n[0].length) : -1;
+}
+
+function parseSeconds(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 2));
+ return n ? (d.S = +n[0], i + n[0].length) : -1;
+}
+
+function parseMilliseconds(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 3));
+ return n ? (d.L = +n[0], i + n[0].length) : -1;
+}
+
+function parseMicroseconds(d, string, i) {
+ var n = numberRe.exec(string.slice(i, i + 6));
+ return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;
+}
+
+function parseLiteralPercent(d, string, i) {
+ var n = percentRe.exec(string.slice(i, i + 1));
+ return n ? i + n[0].length : -1;
+}
+
+function parseUnixTimestamp(d, string, i) {
+ var n = numberRe.exec(string.slice(i));
+ return n ? (d.Q = +n[0], i + n[0].length) : -1;
+}
+
+function parseUnixTimestampSeconds(d, string, i) {
+ var n = numberRe.exec(string.slice(i));
+ return n ? (d.s = +n[0], i + n[0].length) : -1;
+}
+
+function formatDayOfMonth(d, p) {
+ return pad(d.getDate(), p, 2);
+}
+
+function formatHour24(d, p) {
+ return pad(d.getHours(), p, 2);
+}
+
+function formatHour12(d, p) {
+ return pad(d.getHours() % 12 || 12, p, 2);
+}
+
+function formatDayOfYear(d, p) {
+ return pad(1 + timeDay.count(timeYear(d), d), p, 3);
+}
+
+function formatMilliseconds(d, p) {
+ return pad(d.getMilliseconds(), p, 3);
+}
+
+function formatMicroseconds(d, p) {
+ return formatMilliseconds(d, p) + "000";
+}
+
+function formatMonthNumber(d, p) {
+ return pad(d.getMonth() + 1, p, 2);
+}
+
+function formatMinutes(d, p) {
+ return pad(d.getMinutes(), p, 2);
+}
+
+function formatSeconds(d, p) {
+ return pad(d.getSeconds(), p, 2);
+}
+
+function formatWeekdayNumberMonday(d) {
+ var day = d.getDay();
+ return day === 0 ? 7 : day;
+}
+
+function formatWeekNumberSunday(d, p) {
+ return pad(timeSunday.count(timeYear(d) - 1, d), p, 2);
+}
+
+function dISO(d) {
+ var day = d.getDay();
+ return (day >= 4 || day === 0) ? timeThursday(d) : timeThursday.ceil(d);
+}
+
+function formatWeekNumberISO(d, p) {
+ d = dISO(d);
+ return pad(timeThursday.count(timeYear(d), d) + (timeYear(d).getDay() === 4), p, 2);
+}
+
+function formatWeekdayNumberSunday(d) {
+ return d.getDay();
+}
+
+function formatWeekNumberMonday(d, p) {
+ return pad(timeMonday.count(timeYear(d) - 1, d), p, 2);
+}
+
+function formatYear(d, p) {
+ return pad(d.getFullYear() % 100, p, 2);
+}
+
+function formatYearISO(d, p) {
+ d = dISO(d);
+ return pad(d.getFullYear() % 100, p, 2);
+}
+
+function formatFullYear(d, p) {
+ return pad(d.getFullYear() % 10000, p, 4);
+}
+
+function formatFullYearISO(d, p) {
+ var day = d.getDay();
+ d = (day >= 4 || day === 0) ? timeThursday(d) : timeThursday.ceil(d);
+ return pad(d.getFullYear() % 10000, p, 4);
+}
+
+function formatZone(d) {
+ var z = d.getTimezoneOffset();
+ return (z > 0 ? "-" : (z *= -1, "+"))
+ + pad(z / 60 | 0, "0", 2)
+ + pad(z % 60, "0", 2);
+}
+
+function formatUTCDayOfMonth(d, p) {
+ return pad(d.getUTCDate(), p, 2);
+}
+
+function formatUTCHour24(d, p) {
+ return pad(d.getUTCHours(), p, 2);
+}
+
+function formatUTCHour12(d, p) {
+ return pad(d.getUTCHours() % 12 || 12, p, 2);
+}
+
+function formatUTCDayOfYear(d, p) {
+ return pad(1 + utcDay.count(utcYear(d), d), p, 3);
+}
+
+function formatUTCMilliseconds(d, p) {
+ return pad(d.getUTCMilliseconds(), p, 3);
+}
+
+function formatUTCMicroseconds(d, p) {
+ return formatUTCMilliseconds(d, p) + "000";
+}
+
+function formatUTCMonthNumber(d, p) {
+ return pad(d.getUTCMonth() + 1, p, 2);
+}
+
+function formatUTCMinutes(d, p) {
+ return pad(d.getUTCMinutes(), p, 2);
+}
+
+function formatUTCSeconds(d, p) {
+ return pad(d.getUTCSeconds(), p, 2);
+}
+
+function formatUTCWeekdayNumberMonday(d) {
+ var dow = d.getUTCDay();
+ return dow === 0 ? 7 : dow;
+}
+
+function formatUTCWeekNumberSunday(d, p) {
+ return pad(utcSunday.count(utcYear(d) - 1, d), p, 2);
+}
+
+function UTCdISO(d) {
+ var day = d.getUTCDay();
+ return (day >= 4 || day === 0) ? utcThursday(d) : utcThursday.ceil(d);
+}
+
+function formatUTCWeekNumberISO(d, p) {
+ d = UTCdISO(d);
+ return pad(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);
+}
+
+function formatUTCWeekdayNumberSunday(d) {
+ return d.getUTCDay();
+}
+
+function formatUTCWeekNumberMonday(d, p) {
+ return pad(utcMonday.count(utcYear(d) - 1, d), p, 2);
+}
+
+function formatUTCYear(d, p) {
+ return pad(d.getUTCFullYear() % 100, p, 2);
+}
+
+function formatUTCYearISO(d, p) {
+ d = UTCdISO(d);
+ return pad(d.getUTCFullYear() % 100, p, 2);
+}
+
+function formatUTCFullYear(d, p) {
+ return pad(d.getUTCFullYear() % 10000, p, 4);
+}
+
+function formatUTCFullYearISO(d, p) {
+ var day = d.getUTCDay();
+ d = (day >= 4 || day === 0) ? utcThursday(d) : utcThursday.ceil(d);
+ return pad(d.getUTCFullYear() % 10000, p, 4);
+}
+
+function formatUTCZone() {
+ return "+0000";
+}
+
+function formatLiteralPercent() {
+ return "%";
+}
+
+function formatUnixTimestamp(d) {
+ return +d;
+}
+
+function formatUnixTimestampSeconds(d) {
+ return Math.floor(+d / 1000);
+}
+
+var locale;
+exports.timeFormat = void 0;
+exports.timeParse = void 0;
+exports.utcFormat = void 0;
+exports.utcParse = void 0;
+
+defaultLocale({
+ dateTime: "%x, %X",
+ date: "%-m/%-d/%Y",
+ time: "%-I:%M:%S %p",
+ periods: ["AM", "PM"],
+ days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
+ shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
+ months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
+ shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+});
+
+function defaultLocale(definition) {
+ locale = formatLocale(definition);
+ exports.timeFormat = locale.format;
+ exports.timeParse = locale.parse;
+ exports.utcFormat = locale.utcFormat;
+ exports.utcParse = locale.utcParse;
+ return locale;
+}
+
+var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";
+
+function formatIsoNative(date) {
+ return date.toISOString();
+}
+
+var formatIso = Date.prototype.toISOString
+ ? formatIsoNative
+ : exports.utcFormat(isoSpecifier);
+
+var formatIso$1 = formatIso;
+
+function parseIsoNative(string) {
+ var date = new Date(string);
+ return isNaN(date) ? null : date;
+}
+
+var parseIso = +new Date("2000-01-01T00:00:00.000Z")
+ ? parseIsoNative
+ : exports.utcParse(isoSpecifier);
+
+var parseIso$1 = parseIso;
+
+function date(t) {
+ return new Date(t);
+}
+
+function number(t) {
+ return t instanceof Date ? +t : +new Date(+t);
+}
+
+function calendar(ticks, tickInterval, year, month, week, day, hour, minute, second, format) {
+ var scale = continuous(),
+ invert = scale.invert,
+ domain = scale.domain;
+
+ var formatMillisecond = format(".%L"),
+ formatSecond = format(":%S"),
+ formatMinute = format("%I:%M"),
+ formatHour = format("%I %p"),
+ formatDay = format("%a %d"),
+ formatWeek = format("%b %d"),
+ formatMonth = format("%B"),
+ formatYear = format("%Y");
+
+ function tickFormat(date) {
+ return (second(date) < date ? formatMillisecond
+ : minute(date) < date ? formatSecond
+ : hour(date) < date ? formatMinute
+ : day(date) < date ? formatHour
+ : month(date) < date ? (week(date) < date ? formatDay : formatWeek)
+ : year(date) < date ? formatMonth
+ : formatYear)(date);
+ }
+
+ scale.invert = function(y) {
+ return new Date(invert(y));
+ };
+
+ scale.domain = function(_) {
+ return arguments.length ? domain(Array.from(_, number)) : domain().map(date);
+ };
+
+ scale.ticks = function(interval) {
+ var d = domain();
+ return ticks(d[0], d[d.length - 1], interval == null ? 10 : interval);
+ };
+
+ scale.tickFormat = function(count, specifier) {
+ return specifier == null ? tickFormat : format(specifier);
+ };
+
+ scale.nice = function(interval) {
+ var d = domain();
+ if (!interval || typeof interval.range !== "function") interval = tickInterval(d[0], d[d.length - 1], interval == null ? 10 : interval);
+ return interval ? domain(nice(d, interval)) : scale;
+ };
+
+ scale.copy = function() {
+ return copy$1(scale, calendar(ticks, tickInterval, year, month, week, day, hour, minute, second, format));
+ };
+
+ return scale;
+}
+
+function time() {
+ return initRange.apply(calendar(timeTicks, timeTickInterval, timeYear, timeMonth, timeSunday, timeDay, timeHour, timeMinute, second, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]), arguments);
+}
+
+function utcTime() {
+ return initRange.apply(calendar(utcTicks, utcTickInterval, utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]), arguments);
+}
+
+function transformer$1() {
+ var x0 = 0,
+ x1 = 1,
+ t0,
+ t1,
+ k10,
+ transform,
+ interpolator = identity$3,
+ clamp = false,
+ unknown;
+
+ function scale(x) {
+ return x == null || isNaN(x = +x) ? unknown : interpolator(k10 === 0 ? 0.5 : (x = (transform(x) - t0) * k10, clamp ? Math.max(0, Math.min(1, x)) : x));
+ }
+
+ scale.domain = function(_) {
+ return arguments.length ? ([x0, x1] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0), scale) : [x0, x1];
+ };
+
+ scale.clamp = function(_) {
+ return arguments.length ? (clamp = !!_, scale) : clamp;
+ };
+
+ scale.interpolator = function(_) {
+ return arguments.length ? (interpolator = _, scale) : interpolator;
+ };
+
+ function range(interpolate) {
+ return function(_) {
+ var r0, r1;
+ return arguments.length ? ([r0, r1] = _, interpolator = interpolate(r0, r1), scale) : [interpolator(0), interpolator(1)];
+ };
+ }
+
+ scale.range = range(interpolate$2);
+
+ scale.rangeRound = range(interpolateRound);
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ return function(t) {
+ transform = t, t0 = t(x0), t1 = t(x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0);
+ return scale;
+ };
+}
+
+function copy(source, target) {
+ return target
+ .domain(source.domain())
+ .interpolator(source.interpolator())
+ .clamp(source.clamp())
+ .unknown(source.unknown());
+}
+
+function sequential() {
+ var scale = linearish(transformer$1()(identity$3));
+
+ scale.copy = function() {
+ return copy(scale, sequential());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function sequentialLog() {
+ var scale = loggish(transformer$1()).domain([1, 10]);
+
+ scale.copy = function() {
+ return copy(scale, sequentialLog()).base(scale.base());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function sequentialSymlog() {
+ var scale = symlogish(transformer$1());
+
+ scale.copy = function() {
+ return copy(scale, sequentialSymlog()).constant(scale.constant());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function sequentialPow() {
+ var scale = powish(transformer$1());
+
+ scale.copy = function() {
+ return copy(scale, sequentialPow()).exponent(scale.exponent());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function sequentialSqrt() {
+ return sequentialPow.apply(null, arguments).exponent(0.5);
+}
+
+function sequentialQuantile() {
+ var domain = [],
+ interpolator = identity$3;
+
+ function scale(x) {
+ if (x != null && !isNaN(x = +x)) return interpolator((bisect(domain, x, 1) - 1) / (domain.length - 1));
+ }
+
+ scale.domain = function(_) {
+ if (!arguments.length) return domain.slice();
+ domain = [];
+ for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d);
+ domain.sort(ascending$3);
+ return scale;
+ };
+
+ scale.interpolator = function(_) {
+ return arguments.length ? (interpolator = _, scale) : interpolator;
+ };
+
+ scale.range = function() {
+ return domain.map((d, i) => interpolator(i / (domain.length - 1)));
+ };
+
+ scale.quantiles = function(n) {
+ return Array.from({length: n + 1}, (_, i) => quantile$1(domain, i / n));
+ };
+
+ scale.copy = function() {
+ return sequentialQuantile(interpolator).domain(domain);
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function transformer() {
+ var x0 = 0,
+ x1 = 0.5,
+ x2 = 1,
+ s = 1,
+ t0,
+ t1,
+ t2,
+ k10,
+ k21,
+ interpolator = identity$3,
+ transform,
+ clamp = false,
+ unknown;
+
+ function scale(x) {
+ return isNaN(x = +x) ? unknown : (x = 0.5 + ((x = +transform(x)) - t1) * (s * x < s * t1 ? k10 : k21), interpolator(clamp ? Math.max(0, Math.min(1, x)) : x));
+ }
+
+ scale.domain = function(_) {
+ return arguments.length ? ([x0, x1, x2] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), t2 = transform(x2 = +x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1, scale) : [x0, x1, x2];
+ };
+
+ scale.clamp = function(_) {
+ return arguments.length ? (clamp = !!_, scale) : clamp;
+ };
+
+ scale.interpolator = function(_) {
+ return arguments.length ? (interpolator = _, scale) : interpolator;
+ };
+
+ function range(interpolate) {
+ return function(_) {
+ var r0, r1, r2;
+ return arguments.length ? ([r0, r1, r2] = _, interpolator = piecewise(interpolate, [r0, r1, r2]), scale) : [interpolator(0), interpolator(0.5), interpolator(1)];
+ };
+ }
+
+ scale.range = range(interpolate$2);
+
+ scale.rangeRound = range(interpolateRound);
+
+ scale.unknown = function(_) {
+ return arguments.length ? (unknown = _, scale) : unknown;
+ };
+
+ return function(t) {
+ transform = t, t0 = t(x0), t1 = t(x1), t2 = t(x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1;
+ return scale;
+ };
+}
+
+function diverging$1() {
+ var scale = linearish(transformer()(identity$3));
+
+ scale.copy = function() {
+ return copy(scale, diverging$1());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function divergingLog() {
+ var scale = loggish(transformer()).domain([0.1, 1, 10]);
+
+ scale.copy = function() {
+ return copy(scale, divergingLog()).base(scale.base());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function divergingSymlog() {
+ var scale = symlogish(transformer());
+
+ scale.copy = function() {
+ return copy(scale, divergingSymlog()).constant(scale.constant());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function divergingPow() {
+ var scale = powish(transformer());
+
+ scale.copy = function() {
+ return copy(scale, divergingPow()).exponent(scale.exponent());
+ };
+
+ return initInterpolator.apply(scale, arguments);
+}
+
+function divergingSqrt() {
+ return divergingPow.apply(null, arguments).exponent(0.5);
+}
+
+function colors(specifier) {
+ var n = specifier.length / 6 | 0, colors = new Array(n), i = 0;
+ while (i < n) colors[i] = "#" + specifier.slice(i * 6, ++i * 6);
+ return colors;
+}
+
+var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
+
+var Accent = colors("7fc97fbeaed4fdc086ffff99386cb0f0027fbf5b17666666");
+
+var Dark2 = colors("1b9e77d95f027570b3e7298a66a61ee6ab02a6761d666666");
+
+var observable10 = colors("4269d0efb118ff725c6cc5b03ca951ff8ab7a463f297bbf59c6b4e9498a0");
+
+var Paired = colors("a6cee31f78b4b2df8a33a02cfb9a99e31a1cfdbf6fff7f00cab2d66a3d9affff99b15928");
+
+var Pastel1 = colors("fbb4aeb3cde3ccebc5decbe4fed9a6ffffcce5d8bdfddaecf2f2f2");
+
+var Pastel2 = colors("b3e2cdfdcdaccbd5e8f4cae4e6f5c9fff2aef1e2cccccccc");
+
+var Set1 = colors("e41a1c377eb84daf4a984ea3ff7f00ffff33a65628f781bf999999");
+
+var Set2 = colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3");
+
+var Set3 = colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f");
+
+var Tableau10 = colors("4e79a7f28e2ce1575976b7b259a14fedc949af7aa1ff9da79c755fbab0ab");
+
+var ramp$1 = scheme => rgbBasis(scheme[scheme.length - 1]);
+
+var scheme$q = new Array(3).concat(
+ "d8b365f5f5f55ab4ac",
+ "a6611adfc27d80cdc1018571",
+ "a6611adfc27df5f5f580cdc1018571",
+ "8c510ad8b365f6e8c3c7eae55ab4ac01665e",
+ "8c510ad8b365f6e8c3f5f5f5c7eae55ab4ac01665e",
+ "8c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e",
+ "8c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e",
+ "5430058c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e003c30",
+ "5430058c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e003c30"
+).map(colors);
+
+var BrBG = ramp$1(scheme$q);
+
+var scheme$p = new Array(3).concat(
+ "af8dc3f7f7f77fbf7b",
+ "7b3294c2a5cfa6dba0008837",
+ "7b3294c2a5cff7f7f7a6dba0008837",
+ "762a83af8dc3e7d4e8d9f0d37fbf7b1b7837",
+ "762a83af8dc3e7d4e8f7f7f7d9f0d37fbf7b1b7837",
+ "762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b7837",
+ "762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b7837",
+ "40004b762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b783700441b",
+ "40004b762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b783700441b"
+).map(colors);
+
+var PRGn = ramp$1(scheme$p);
+
+var scheme$o = new Array(3).concat(
+ "e9a3c9f7f7f7a1d76a",
+ "d01c8bf1b6dab8e1864dac26",
+ "d01c8bf1b6daf7f7f7b8e1864dac26",
+ "c51b7de9a3c9fde0efe6f5d0a1d76a4d9221",
+ "c51b7de9a3c9fde0eff7f7f7e6f5d0a1d76a4d9221",
+ "c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221",
+ "c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221",
+ "8e0152c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221276419",
+ "8e0152c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221276419"
+).map(colors);
+
+var PiYG = ramp$1(scheme$o);
+
+var scheme$n = new Array(3).concat(
+ "998ec3f7f7f7f1a340",
+ "5e3c99b2abd2fdb863e66101",
+ "5e3c99b2abd2f7f7f7fdb863e66101",
+ "542788998ec3d8daebfee0b6f1a340b35806",
+ "542788998ec3d8daebf7f7f7fee0b6f1a340b35806",
+ "5427888073acb2abd2d8daebfee0b6fdb863e08214b35806",
+ "5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b35806",
+ "2d004b5427888073acb2abd2d8daebfee0b6fdb863e08214b358067f3b08",
+ "2d004b5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b358067f3b08"
+).map(colors);
+
+var PuOr = ramp$1(scheme$n);
+
+var scheme$m = new Array(3).concat(
+ "ef8a62f7f7f767a9cf",
+ "ca0020f4a58292c5de0571b0",
+ "ca0020f4a582f7f7f792c5de0571b0",
+ "b2182bef8a62fddbc7d1e5f067a9cf2166ac",
+ "b2182bef8a62fddbc7f7f7f7d1e5f067a9cf2166ac",
+ "b2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac",
+ "b2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac",
+ "67001fb2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac053061",
+ "67001fb2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac053061"
+).map(colors);
+
+var RdBu = ramp$1(scheme$m);
+
+var scheme$l = new Array(3).concat(
+ "ef8a62ffffff999999",
+ "ca0020f4a582bababa404040",
+ "ca0020f4a582ffffffbababa404040",
+ "b2182bef8a62fddbc7e0e0e09999994d4d4d",
+ "b2182bef8a62fddbc7ffffffe0e0e09999994d4d4d",
+ "b2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d",
+ "b2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d",
+ "67001fb2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d1a1a1a",
+ "67001fb2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d1a1a1a"
+).map(colors);
+
+var RdGy = ramp$1(scheme$l);
+
+var scheme$k = new Array(3).concat(
+ "fc8d59ffffbf91bfdb",
+ "d7191cfdae61abd9e92c7bb6",
+ "d7191cfdae61ffffbfabd9e92c7bb6",
+ "d73027fc8d59fee090e0f3f891bfdb4575b4",
+ "d73027fc8d59fee090ffffbfe0f3f891bfdb4575b4",
+ "d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4",
+ "d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4",
+ "a50026d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4313695",
+ "a50026d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4313695"
+).map(colors);
+
+var RdYlBu = ramp$1(scheme$k);
+
+var scheme$j = new Array(3).concat(
+ "fc8d59ffffbf91cf60",
+ "d7191cfdae61a6d96a1a9641",
+ "d7191cfdae61ffffbfa6d96a1a9641",
+ "d73027fc8d59fee08bd9ef8b91cf601a9850",
+ "d73027fc8d59fee08bffffbfd9ef8b91cf601a9850",
+ "d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850",
+ "d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850",
+ "a50026d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850006837",
+ "a50026d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850006837"
+).map(colors);
+
+var RdYlGn = ramp$1(scheme$j);
+
+var scheme$i = new Array(3).concat(
+ "fc8d59ffffbf99d594",
+ "d7191cfdae61abdda42b83ba",
+ "d7191cfdae61ffffbfabdda42b83ba",
+ "d53e4ffc8d59fee08be6f59899d5943288bd",
+ "d53e4ffc8d59fee08bffffbfe6f59899d5943288bd",
+ "d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd",
+ "d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd",
+ "9e0142d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd5e4fa2",
+ "9e0142d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd5e4fa2"
+).map(colors);
+
+var Spectral = ramp$1(scheme$i);
+
+var scheme$h = new Array(3).concat(
+ "e5f5f999d8c92ca25f",
+ "edf8fbb2e2e266c2a4238b45",
+ "edf8fbb2e2e266c2a42ca25f006d2c",
+ "edf8fbccece699d8c966c2a42ca25f006d2c",
+ "edf8fbccece699d8c966c2a441ae76238b45005824",
+ "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45005824",
+ "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45006d2c00441b"
+).map(colors);
+
+var BuGn = ramp$1(scheme$h);
+
+var scheme$g = new Array(3).concat(
+ "e0ecf49ebcda8856a7",
+ "edf8fbb3cde38c96c688419d",
+ "edf8fbb3cde38c96c68856a7810f7c",
+ "edf8fbbfd3e69ebcda8c96c68856a7810f7c",
+ "edf8fbbfd3e69ebcda8c96c68c6bb188419d6e016b",
+ "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d6e016b",
+ "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d810f7c4d004b"
+).map(colors);
+
+var BuPu = ramp$1(scheme$g);
+
+var scheme$f = new Array(3).concat(
+ "e0f3dba8ddb543a2ca",
+ "f0f9e8bae4bc7bccc42b8cbe",
+ "f0f9e8bae4bc7bccc443a2ca0868ac",
+ "f0f9e8ccebc5a8ddb57bccc443a2ca0868ac",
+ "f0f9e8ccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+ "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+ "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe0868ac084081"
+).map(colors);
+
+var GnBu = ramp$1(scheme$f);
+
+var scheme$e = new Array(3).concat(
+ "fee8c8fdbb84e34a33",
+ "fef0d9fdcc8afc8d59d7301f",
+ "fef0d9fdcc8afc8d59e34a33b30000",
+ "fef0d9fdd49efdbb84fc8d59e34a33b30000",
+ "fef0d9fdd49efdbb84fc8d59ef6548d7301f990000",
+ "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301f990000",
+ "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301fb300007f0000"
+).map(colors);
+
+var OrRd = ramp$1(scheme$e);
+
+var scheme$d = new Array(3).concat(
+ "ece2f0a6bddb1c9099",
+ "f6eff7bdc9e167a9cf02818a",
+ "f6eff7bdc9e167a9cf1c9099016c59",
+ "f6eff7d0d1e6a6bddb67a9cf1c9099016c59",
+ "f6eff7d0d1e6a6bddb67a9cf3690c002818a016450",
+ "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016450",
+ "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016c59014636"
+).map(colors);
+
+var PuBuGn = ramp$1(scheme$d);
+
+var scheme$c = new Array(3).concat(
+ "ece7f2a6bddb2b8cbe",
+ "f1eef6bdc9e174a9cf0570b0",
+ "f1eef6bdc9e174a9cf2b8cbe045a8d",
+ "f1eef6d0d1e6a6bddb74a9cf2b8cbe045a8d",
+ "f1eef6d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+ "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+ "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0045a8d023858"
+).map(colors);
+
+var PuBu = ramp$1(scheme$c);
+
+var scheme$b = new Array(3).concat(
+ "e7e1efc994c7dd1c77",
+ "f1eef6d7b5d8df65b0ce1256",
+ "f1eef6d7b5d8df65b0dd1c77980043",
+ "f1eef6d4b9dac994c7df65b0dd1c77980043",
+ "f1eef6d4b9dac994c7df65b0e7298ace125691003f",
+ "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125691003f",
+ "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125698004367001f"
+).map(colors);
+
+var PuRd = ramp$1(scheme$b);
+
+var scheme$a = new Array(3).concat(
+ "fde0ddfa9fb5c51b8a",
+ "feebe2fbb4b9f768a1ae017e",
+ "feebe2fbb4b9f768a1c51b8a7a0177",
+ "feebe2fcc5c0fa9fb5f768a1c51b8a7a0177",
+ "feebe2fcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+ "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+ "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a017749006a"
+).map(colors);
+
+var RdPu = ramp$1(scheme$a);
+
+var scheme$9 = new Array(3).concat(
+ "edf8b17fcdbb2c7fb8",
+ "ffffcca1dab441b6c4225ea8",
+ "ffffcca1dab441b6c42c7fb8253494",
+ "ffffccc7e9b47fcdbb41b6c42c7fb8253494",
+ "ffffccc7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+ "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+ "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea8253494081d58"
+).map(colors);
+
+var YlGnBu = ramp$1(scheme$9);
+
+var scheme$8 = new Array(3).concat(
+ "f7fcb9addd8e31a354",
+ "ffffccc2e69978c679238443",
+ "ffffccc2e69978c67931a354006837",
+ "ffffccd9f0a3addd8e78c67931a354006837",
+ "ffffccd9f0a3addd8e78c67941ab5d238443005a32",
+ "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443005a32",
+ "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443006837004529"
+).map(colors);
+
+var YlGn = ramp$1(scheme$8);
+
+var scheme$7 = new Array(3).concat(
+ "fff7bcfec44fd95f0e",
+ "ffffd4fed98efe9929cc4c02",
+ "ffffd4fed98efe9929d95f0e993404",
+ "ffffd4fee391fec44ffe9929d95f0e993404",
+ "ffffd4fee391fec44ffe9929ec7014cc4c028c2d04",
+ "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c028c2d04",
+ "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c02993404662506"
+).map(colors);
+
+var YlOrBr = ramp$1(scheme$7);
+
+var scheme$6 = new Array(3).concat(
+ "ffeda0feb24cf03b20",
+ "ffffb2fecc5cfd8d3ce31a1c",
+ "ffffb2fecc5cfd8d3cf03b20bd0026",
+ "ffffb2fed976feb24cfd8d3cf03b20bd0026",
+ "ffffb2fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+ "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+ "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cbd0026800026"
+).map(colors);
+
+var YlOrRd = ramp$1(scheme$6);
+
+var scheme$5 = new Array(3).concat(
+ "deebf79ecae13182bd",
+ "eff3ffbdd7e76baed62171b5",
+ "eff3ffbdd7e76baed63182bd08519c",
+ "eff3ffc6dbef9ecae16baed63182bd08519c",
+ "eff3ffc6dbef9ecae16baed64292c62171b5084594",
+ "f7fbffdeebf7c6dbef9ecae16baed64292c62171b5084594",
+ "f7fbffdeebf7c6dbef9ecae16baed64292c62171b508519c08306b"
+).map(colors);
+
+var Blues = ramp$1(scheme$5);
+
+var scheme$4 = new Array(3).concat(
+ "e5f5e0a1d99b31a354",
+ "edf8e9bae4b374c476238b45",
+ "edf8e9bae4b374c47631a354006d2c",
+ "edf8e9c7e9c0a1d99b74c47631a354006d2c",
+ "edf8e9c7e9c0a1d99b74c47641ab5d238b45005a32",
+ "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45005a32",
+ "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45006d2c00441b"
+).map(colors);
+
+var Greens = ramp$1(scheme$4);
+
+var scheme$3 = new Array(3).concat(
+ "f0f0f0bdbdbd636363",
+ "f7f7f7cccccc969696525252",
+ "f7f7f7cccccc969696636363252525",
+ "f7f7f7d9d9d9bdbdbd969696636363252525",
+ "f7f7f7d9d9d9bdbdbd969696737373525252252525",
+ "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525",
+ "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525000000"
+).map(colors);
+
+var Greys = ramp$1(scheme$3);
+
+var scheme$2 = new Array(3).concat(
+ "efedf5bcbddc756bb1",
+ "f2f0f7cbc9e29e9ac86a51a3",
+ "f2f0f7cbc9e29e9ac8756bb154278f",
+ "f2f0f7dadaebbcbddc9e9ac8756bb154278f",
+ "f2f0f7dadaebbcbddc9e9ac8807dba6a51a34a1486",
+ "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a34a1486",
+ "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a354278f3f007d"
+).map(colors);
+
+var Purples = ramp$1(scheme$2);
+
+var scheme$1 = new Array(3).concat(
+ "fee0d2fc9272de2d26",
+ "fee5d9fcae91fb6a4acb181d",
+ "fee5d9fcae91fb6a4ade2d26a50f15",
+ "fee5d9fcbba1fc9272fb6a4ade2d26a50f15",
+ "fee5d9fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+ "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+ "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181da50f1567000d"
+).map(colors);
+
+var Reds = ramp$1(scheme$1);
+
+var scheme = new Array(3).concat(
+ "fee6cefdae6be6550d",
+ "feeddefdbe85fd8d3cd94701",
+ "feeddefdbe85fd8d3ce6550da63603",
+ "feeddefdd0a2fdae6bfd8d3ce6550da63603",
+ "feeddefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+ "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+ "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d94801a636037f2704"
+).map(colors);
+
+var Oranges = ramp$1(scheme);
+
+function cividis(t) {
+ t = Math.max(0, Math.min(1, t));
+ return "rgb("
+ + Math.max(0, Math.min(255, Math.round(-4.54 - t * (35.34 - t * (2381.73 - t * (6402.7 - t * (7024.72 - t * 2710.57))))))) + ", "
+ + Math.max(0, Math.min(255, Math.round(32.49 + t * (170.73 + t * (52.82 - t * (131.46 - t * (176.58 - t * 67.37))))))) + ", "
+ + Math.max(0, Math.min(255, Math.round(81.24 + t * (442.36 - t * (2482.43 - t * (6167.24 - t * (6614.94 - t * 2475.67)))))))
+ + ")";
+}
+
+var cubehelix = cubehelixLong(cubehelix$3(300, 0.5, 0.0), cubehelix$3(-240, 0.5, 1.0));
+
+var warm = cubehelixLong(cubehelix$3(-100, 0.75, 0.35), cubehelix$3(80, 1.50, 0.8));
+
+var cool = cubehelixLong(cubehelix$3(260, 0.75, 0.35), cubehelix$3(80, 1.50, 0.8));
+
+var c$2 = cubehelix$3();
+
+function rainbow(t) {
+ if (t < 0 || t > 1) t -= Math.floor(t);
+ var ts = Math.abs(t - 0.5);
+ c$2.h = 360 * t - 100;
+ c$2.s = 1.5 - 1.5 * ts;
+ c$2.l = 0.8 - 0.9 * ts;
+ return c$2 + "";
+}
+
+var c$1 = rgb(),
+ pi_1_3 = Math.PI / 3,
+ pi_2_3 = Math.PI * 2 / 3;
+
+function sinebow(t) {
+ var x;
+ t = (0.5 - t) * Math.PI;
+ c$1.r = 255 * (x = Math.sin(t)) * x;
+ c$1.g = 255 * (x = Math.sin(t + pi_1_3)) * x;
+ c$1.b = 255 * (x = Math.sin(t + pi_2_3)) * x;
+ return c$1 + "";
+}
+
+function turbo(t) {
+ t = Math.max(0, Math.min(1, t));
+ return "rgb("
+ + Math.max(0, Math.min(255, Math.round(34.61 + t * (1172.33 - t * (10793.56 - t * (33300.12 - t * (38394.49 - t * 14825.05))))))) + ", "
+ + Math.max(0, Math.min(255, Math.round(23.31 + t * (557.33 + t * (1225.33 - t * (3574.96 - t * (1073.77 + t * 707.56))))))) + ", "
+ + Math.max(0, Math.min(255, Math.round(27.2 + t * (3211.1 - t * (15327.97 - t * (27814 - t * (22569.18 - t * 6838.66)))))))
+ + ")";
+}
+
+function ramp(range) {
+ var n = range.length;
+ return function(t) {
+ return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+ };
+}
+
+var viridis = ramp(colors("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"));
+
+var magma = ramp(colors("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"));
+
+var inferno = ramp(colors("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"));
+
+var plasma = ramp(colors("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"));
+
+function constant$1(x) {
+ return function constant() {
+ return x;
+ };
+}
+
+const abs = Math.abs;
+const atan2 = Math.atan2;
+const cos = Math.cos;
+const max = Math.max;
+const min = Math.min;
+const sin = Math.sin;
+const sqrt = Math.sqrt;
+
+const epsilon = 1e-12;
+const pi = Math.PI;
+const halfPi = pi / 2;
+const tau = 2 * pi;
+
+function acos(x) {
+ return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
+}
+
+function asin(x) {
+ return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
+}
+
+function withPath(shape) {
+ let digits = 3;
+
+ shape.digits = function(_) {
+ if (!arguments.length) return digits;
+ if (_ == null) {
+ digits = null;
+ } else {
+ const d = Math.floor(_);
+ if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);
+ digits = d;
+ }
+ return shape;
+ };
+
+ return () => new Path$1(digits);
+}
+
+function arcInnerRadius(d) {
+ return d.innerRadius;
+}
+
+function arcOuterRadius(d) {
+ return d.outerRadius;
+}
+
+function arcStartAngle(d) {
+ return d.startAngle;
+}
+
+function arcEndAngle(d) {
+ return d.endAngle;
+}
+
+function arcPadAngle(d) {
+ return d && d.padAngle; // Note: optional!
+}
+
+function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
+ var x10 = x1 - x0, y10 = y1 - y0,
+ x32 = x3 - x2, y32 = y3 - y2,
+ t = y32 * x10 - x32 * y10;
+ if (t * t < epsilon) return;
+ t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;
+ return [x0 + t * x10, y0 + t * y10];
+}
+
+// Compute perpendicular offset line of length rc.
+// http://mathworld.wolfram.com/Circle-LineIntersection.html
+function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
+ var x01 = x0 - x1,
+ y01 = y0 - y1,
+ lo = (cw ? rc : -rc) / sqrt(x01 * x01 + y01 * y01),
+ ox = lo * y01,
+ oy = -lo * x01,
+ x11 = x0 + ox,
+ y11 = y0 + oy,
+ x10 = x1 + ox,
+ y10 = y1 + oy,
+ x00 = (x11 + x10) / 2,
+ y00 = (y11 + y10) / 2,
+ dx = x10 - x11,
+ dy = y10 - y11,
+ d2 = dx * dx + dy * dy,
+ r = r1 - rc,
+ D = x11 * y10 - x10 * y11,
+ d = (dy < 0 ? -1 : 1) * sqrt(max(0, r * r * d2 - D * D)),
+ cx0 = (D * dy - dx * d) / d2,
+ cy0 = (-D * dx - dy * d) / d2,
+ cx1 = (D * dy + dx * d) / d2,
+ cy1 = (-D * dx + dy * d) / d2,
+ dx0 = cx0 - x00,
+ dy0 = cy0 - y00,
+ dx1 = cx1 - x00,
+ dy1 = cy1 - y00;
+
+ // Pick the closer of the two intersection points.
+ // TODO Is there a faster way to determine which intersection to use?
+ if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
+
+ return {
+ cx: cx0,
+ cy: cy0,
+ x01: -ox,
+ y01: -oy,
+ x11: cx0 * (r1 / r - 1),
+ y11: cy0 * (r1 / r - 1)
+ };
+}
+
+function arc() {
+ var innerRadius = arcInnerRadius,
+ outerRadius = arcOuterRadius,
+ cornerRadius = constant$1(0),
+ padRadius = null,
+ startAngle = arcStartAngle,
+ endAngle = arcEndAngle,
+ padAngle = arcPadAngle,
+ context = null,
+ path = withPath(arc);
+
+ function arc() {
+ var buffer,
+ r,
+ r0 = +innerRadius.apply(this, arguments),
+ r1 = +outerRadius.apply(this, arguments),
+ a0 = startAngle.apply(this, arguments) - halfPi,
+ a1 = endAngle.apply(this, arguments) - halfPi,
+ da = abs(a1 - a0),
+ cw = a1 > a0;
+
+ if (!context) context = buffer = path();
+
+ // Ensure that the outer radius is always larger than the inner radius.
+ if (r1 < r0) r = r1, r1 = r0, r0 = r;
+
+ // Is it a point?
+ if (!(r1 > epsilon)) context.moveTo(0, 0);
+
+ // Or is it a circle or annulus?
+ else if (da > tau - epsilon) {
+ context.moveTo(r1 * cos(a0), r1 * sin(a0));
+ context.arc(0, 0, r1, a0, a1, !cw);
+ if (r0 > epsilon) {
+ context.moveTo(r0 * cos(a1), r0 * sin(a1));
+ context.arc(0, 0, r0, a1, a0, cw);
+ }
+ }
+
+ // Or is it a circular or annular sector?
+ else {
+ var a01 = a0,
+ a11 = a1,
+ a00 = a0,
+ a10 = a1,
+ da0 = da,
+ da1 = da,
+ ap = padAngle.apply(this, arguments) / 2,
+ rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : sqrt(r0 * r0 + r1 * r1)),
+ rc = min(abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
+ rc0 = rc,
+ rc1 = rc,
+ t0,
+ t1;
+
+ // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
+ if (rp > epsilon) {
+ var p0 = asin(rp / r0 * sin(ap)),
+ p1 = asin(rp / r1 * sin(ap));
+ if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
+ else da0 = 0, a00 = a10 = (a0 + a1) / 2;
+ if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
+ else da1 = 0, a01 = a11 = (a0 + a1) / 2;
+ }
+
+ var x01 = r1 * cos(a01),
+ y01 = r1 * sin(a01),
+ x10 = r0 * cos(a10),
+ y10 = r0 * sin(a10);
+
+ // Apply rounded corners?
+ if (rc > epsilon) {
+ var x11 = r1 * cos(a11),
+ y11 = r1 * sin(a11),
+ x00 = r0 * cos(a00),
+ y00 = r0 * sin(a00),
+ oc;
+
+ // Restrict the corner radius according to the sector angle. If this
+ // intersection fails, it’s probably because the arc is too small, so
+ // disable the corner radius entirely.
+ if (da < pi) {
+ if (oc = intersect(x01, y01, x00, y00, x11, y11, x10, y10)) {
+ var ax = x01 - oc[0],
+ ay = y01 - oc[1],
+ bx = x11 - oc[0],
+ by = y11 - oc[1],
+ kc = 1 / sin(acos((ax * bx + ay * by) / (sqrt(ax * ax + ay * ay) * sqrt(bx * bx + by * by))) / 2),
+ lc = sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
+ rc0 = min(rc, (r0 - lc) / (kc - 1));
+ rc1 = min(rc, (r1 - lc) / (kc + 1));
+ } else {
+ rc0 = rc1 = 0;
+ }
+ }
+ }
+
+ // Is the sector collapsed to a line?
+ if (!(da1 > epsilon)) context.moveTo(x01, y01);
+
+ // Does the sector’s outer ring have rounded corners?
+ else if (rc1 > epsilon) {
+ t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
+ t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
+
+ context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+ // Have the corners merged?
+ if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
+
+ // Otherwise, draw the two corners and the ring.
+ else {
+ context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
+ context.arc(0, 0, r1, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
+ context.arc(t1.cx, t1.cy, rc1, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
+ }
+ }
+
+ // Or is the outer ring just a circular arc?
+ else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
+
+ // Is there no inner ring, and it’s a circular sector?
+ // Or perhaps it’s an annular sector collapsed due to padding?
+ if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);
+
+ // Does the sector’s inner ring (or point) have rounded corners?
+ else if (rc0 > epsilon) {
+ t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
+ t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
+
+ context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+ // Have the corners merged?
+ if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
+
+ // Otherwise, draw the two corners and the ring.
+ else {
+ context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
+ context.arc(0, 0, r0, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
+ context.arc(t1.cx, t1.cy, rc0, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
+ }
+ }
+
+ // Or is the inner ring just a circular arc?
+ else context.arc(0, 0, r0, a10, a00, cw);
+ }
+
+ context.closePath();
+
+ if (buffer) return context = null, buffer + "" || null;
+ }
+
+ arc.centroid = function() {
+ var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
+ a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;
+ return [cos(a) * r, sin(a) * r];
+ };
+
+ arc.innerRadius = function(_) {
+ return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : innerRadius;
+ };
+
+ arc.outerRadius = function(_) {
+ return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : outerRadius;
+ };
+
+ arc.cornerRadius = function(_) {
+ return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$1(+_), arc) : cornerRadius;
+ };
+
+ arc.padRadius = function(_) {
+ return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), arc) : padRadius;
+ };
+
+ arc.startAngle = function(_) {
+ return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : startAngle;
+ };
+
+ arc.endAngle = function(_) {
+ return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : endAngle;
+ };
+
+ arc.padAngle = function(_) {
+ return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$1(+_), arc) : padAngle;
+ };
+
+ arc.context = function(_) {
+ return arguments.length ? ((context = _ == null ? null : _), arc) : context;
+ };
+
+ return arc;
+}
+
+var slice = Array.prototype.slice;
+
+function array(x) {
+ return typeof x === "object" && "length" in x
+ ? x // Array, TypedArray, NodeList, array-like
+ : Array.from(x); // Map, Set, iterable, string, or anything else
+}
+
+function Linear(context) {
+ this._context = context;
+}
+
+Linear.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; // falls through
+ default: this._context.lineTo(x, y); break;
+ }
+ }
+};
+
+function curveLinear(context) {
+ return new Linear(context);
+}
+
+function x(p) {
+ return p[0];
+}
+
+function y(p) {
+ return p[1];
+}
+
+function line(x$1, y$1) {
+ var defined = constant$1(true),
+ context = null,
+ curve = curveLinear,
+ output = null,
+ path = withPath(line);
+
+ x$1 = typeof x$1 === "function" ? x$1 : (x$1 === undefined) ? x : constant$1(x$1);
+ y$1 = typeof y$1 === "function" ? y$1 : (y$1 === undefined) ? y : constant$1(y$1);
+
+ function line(data) {
+ var i,
+ n = (data = array(data)).length,
+ d,
+ defined0 = false,
+ buffer;
+
+ if (context == null) output = curve(buffer = path());
+
+ for (i = 0; i <= n; ++i) {
+ if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+ if (defined0 = !defined0) output.lineStart();
+ else output.lineEnd();
+ }
+ if (defined0) output.point(+x$1(d, i, data), +y$1(d, i, data));
+ }
+
+ if (buffer) return output = null, buffer + "" || null;
+ }
+
+ line.x = function(_) {
+ return arguments.length ? (x$1 = typeof _ === "function" ? _ : constant$1(+_), line) : x$1;
+ };
+
+ line.y = function(_) {
+ return arguments.length ? (y$1 = typeof _ === "function" ? _ : constant$1(+_), line) : y$1;
+ };
+
+ line.defined = function(_) {
+ return arguments.length ? (defined = typeof _ === "function" ? _ : constant$1(!!_), line) : defined;
+ };
+
+ line.curve = function(_) {
+ return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
+ };
+
+ line.context = function(_) {
+ return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
+ };
+
+ return line;
+}
+
+function area(x0, y0, y1) {
+ var x1 = null,
+ defined = constant$1(true),
+ context = null,
+ curve = curveLinear,
+ output = null,
+ path = withPath(area);
+
+ x0 = typeof x0 === "function" ? x0 : (x0 === undefined) ? x : constant$1(+x0);
+ y0 = typeof y0 === "function" ? y0 : (y0 === undefined) ? constant$1(0) : constant$1(+y0);
+ y1 = typeof y1 === "function" ? y1 : (y1 === undefined) ? y : constant$1(+y1);
+
+ function area(data) {
+ var i,
+ j,
+ k,
+ n = (data = array(data)).length,
+ d,
+ defined0 = false,
+ buffer,
+ x0z = new Array(n),
+ y0z = new Array(n);
+
+ if (context == null) output = curve(buffer = path());
+
+ for (i = 0; i <= n; ++i) {
+ if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+ if (defined0 = !defined0) {
+ j = i;
+ output.areaStart();
+ output.lineStart();
+ } else {
+ output.lineEnd();
+ output.lineStart();
+ for (k = i - 1; k >= j; --k) {
+ output.point(x0z[k], y0z[k]);
+ }
+ output.lineEnd();
+ output.areaEnd();
+ }
+ }
+ if (defined0) {
+ x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
+ output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
+ }
+ }
+
+ if (buffer) return output = null, buffer + "" || null;
+ }
+
+ function arealine() {
+ return line().defined(defined).curve(curve).context(context);
+ }
+
+ area.x = function(_) {
+ return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$1(+_), x1 = null, area) : x0;
+ };
+
+ area.x0 = function(_) {
+ return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$1(+_), area) : x0;
+ };
+
+ area.x1 = function(_) {
+ return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), area) : x1;
+ };
+
+ area.y = function(_) {
+ return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$1(+_), y1 = null, area) : y0;
+ };
+
+ area.y0 = function(_) {
+ return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$1(+_), area) : y0;
+ };
+
+ area.y1 = function(_) {
+ return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$1(+_), area) : y1;
+ };
+
+ area.lineX0 =
+ area.lineY0 = function() {
+ return arealine().x(x0).y(y0);
+ };
+
+ area.lineY1 = function() {
+ return arealine().x(x0).y(y1);
+ };
+
+ area.lineX1 = function() {
+ return arealine().x(x1).y(y0);
+ };
+
+ area.defined = function(_) {
+ return arguments.length ? (defined = typeof _ === "function" ? _ : constant$1(!!_), area) : defined;
+ };
+
+ area.curve = function(_) {
+ return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
+ };
+
+ area.context = function(_) {
+ return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
+ };
+
+ return area;
+}
+
+function descending$1(a, b) {
+ return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+}
+
+function identity$1(d) {
+ return d;
+}
+
+function pie() {
+ var value = identity$1,
+ sortValues = descending$1,
+ sort = null,
+ startAngle = constant$1(0),
+ endAngle = constant$1(tau),
+ padAngle = constant$1(0);
+
+ function pie(data) {
+ var i,
+ n = (data = array(data)).length,
+ j,
+ k,
+ sum = 0,
+ index = new Array(n),
+ arcs = new Array(n),
+ a0 = +startAngle.apply(this, arguments),
+ da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),
+ a1,
+ p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
+ pa = p * (da < 0 ? -1 : 1),
+ v;
+
+ for (i = 0; i < n; ++i) {
+ if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
+ sum += v;
+ }
+ }
+
+ // Optionally sort the arcs by previously-computed values or by data.
+ if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
+ else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
+
+ // Compute the arcs! They are stored in the original data's order.
+ for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
+ j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
+ data: data[j],
+ index: i,
+ value: v,
+ startAngle: a0,
+ endAngle: a1,
+ padAngle: p
+ };
+ }
+
+ return arcs;
+ }
+
+ pie.value = function(_) {
+ return arguments.length ? (value = typeof _ === "function" ? _ : constant$1(+_), pie) : value;
+ };
+
+ pie.sortValues = function(_) {
+ return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
+ };
+
+ pie.sort = function(_) {
+ return arguments.length ? (sort = _, sortValues = null, pie) : sort;
+ };
+
+ pie.startAngle = function(_) {
+ return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : startAngle;
+ };
+
+ pie.endAngle = function(_) {
+ return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : endAngle;
+ };
+
+ pie.padAngle = function(_) {
+ return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$1(+_), pie) : padAngle;
+ };
+
+ return pie;
+}
+
+var curveRadialLinear = curveRadial(curveLinear);
+
+function Radial(curve) {
+ this._curve = curve;
+}
+
+Radial.prototype = {
+ areaStart: function() {
+ this._curve.areaStart();
+ },
+ areaEnd: function() {
+ this._curve.areaEnd();
+ },
+ lineStart: function() {
+ this._curve.lineStart();
+ },
+ lineEnd: function() {
+ this._curve.lineEnd();
+ },
+ point: function(a, r) {
+ this._curve.point(r * Math.sin(a), r * -Math.cos(a));
+ }
+};
+
+function curveRadial(curve) {
+
+ function radial(context) {
+ return new Radial(curve(context));
+ }
+
+ radial._curve = curve;
+
+ return radial;
+}
+
+function lineRadial(l) {
+ var c = l.curve;
+
+ l.angle = l.x, delete l.x;
+ l.radius = l.y, delete l.y;
+
+ l.curve = function(_) {
+ return arguments.length ? c(curveRadial(_)) : c()._curve;
+ };
+
+ return l;
+}
+
+function lineRadial$1() {
+ return lineRadial(line().curve(curveRadialLinear));
+}
+
+function areaRadial() {
+ var a = area().curve(curveRadialLinear),
+ c = a.curve,
+ x0 = a.lineX0,
+ x1 = a.lineX1,
+ y0 = a.lineY0,
+ y1 = a.lineY1;
+
+ a.angle = a.x, delete a.x;
+ a.startAngle = a.x0, delete a.x0;
+ a.endAngle = a.x1, delete a.x1;
+ a.radius = a.y, delete a.y;
+ a.innerRadius = a.y0, delete a.y0;
+ a.outerRadius = a.y1, delete a.y1;
+ a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;
+ a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;
+ a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;
+ a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;
+
+ a.curve = function(_) {
+ return arguments.length ? c(curveRadial(_)) : c()._curve;
+ };
+
+ return a;
+}
+
+function pointRadial(x, y) {
+ return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
+}
+
+class Bump {
+ constructor(context, x) {
+ this._context = context;
+ this._x = x;
+ }
+ areaStart() {
+ this._line = 0;
+ }
+ areaEnd() {
+ this._line = NaN;
+ }
+ lineStart() {
+ this._point = 0;
+ }
+ lineEnd() {
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ }
+ point(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: {
+ this._point = 1;
+ if (this._line) this._context.lineTo(x, y);
+ else this._context.moveTo(x, y);
+ break;
+ }
+ case 1: this._point = 2; // falls through
+ default: {
+ if (this._x) this._context.bezierCurveTo(this._x0 = (this._x0 + x) / 2, this._y0, this._x0, y, x, y);
+ else this._context.bezierCurveTo(this._x0, this._y0 = (this._y0 + y) / 2, x, this._y0, x, y);
+ break;
+ }
+ }
+ this._x0 = x, this._y0 = y;
+ }
+}
+
+class BumpRadial {
+ constructor(context) {
+ this._context = context;
+ }
+ lineStart() {
+ this._point = 0;
+ }
+ lineEnd() {}
+ point(x, y) {
+ x = +x, y = +y;
+ if (this._point === 0) {
+ this._point = 1;
+ } else {
+ const p0 = pointRadial(this._x0, this._y0);
+ const p1 = pointRadial(this._x0, this._y0 = (this._y0 + y) / 2);
+ const p2 = pointRadial(x, this._y0);
+ const p3 = pointRadial(x, y);
+ this._context.moveTo(...p0);
+ this._context.bezierCurveTo(...p1, ...p2, ...p3);
+ }
+ this._x0 = x, this._y0 = y;
+ }
+}
+
+function bumpX(context) {
+ return new Bump(context, true);
+}
+
+function bumpY(context) {
+ return new Bump(context, false);
+}
+
+function bumpRadial(context) {
+ return new BumpRadial(context);
+}
+
+function linkSource(d) {
+ return d.source;
+}
+
+function linkTarget(d) {
+ return d.target;
+}
+
+function link(curve) {
+ let source = linkSource,
+ target = linkTarget,
+ x$1 = x,
+ y$1 = y,
+ context = null,
+ output = null,
+ path = withPath(link);
+
+ function link() {
+ let buffer;
+ const argv = slice.call(arguments);
+ const s = source.apply(this, argv);
+ const t = target.apply(this, argv);
+ if (context == null) output = curve(buffer = path());
+ output.lineStart();
+ argv[0] = s, output.point(+x$1.apply(this, argv), +y$1.apply(this, argv));
+ argv[0] = t, output.point(+x$1.apply(this, argv), +y$1.apply(this, argv));
+ output.lineEnd();
+ if (buffer) return output = null, buffer + "" || null;
+ }
+
+ link.source = function(_) {
+ return arguments.length ? (source = _, link) : source;
+ };
+
+ link.target = function(_) {
+ return arguments.length ? (target = _, link) : target;
+ };
+
+ link.x = function(_) {
+ return arguments.length ? (x$1 = typeof _ === "function" ? _ : constant$1(+_), link) : x$1;
+ };
+
+ link.y = function(_) {
+ return arguments.length ? (y$1 = typeof _ === "function" ? _ : constant$1(+_), link) : y$1;
+ };
+
+ link.context = function(_) {
+ return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), link) : context;
+ };
+
+ return link;
+}
+
+function linkHorizontal() {
+ return link(bumpX);
+}
+
+function linkVertical() {
+ return link(bumpY);
+}
+
+function linkRadial() {
+ const l = link(bumpRadial);
+ l.angle = l.x, delete l.x;
+ l.radius = l.y, delete l.y;
+ return l;
+}
+
+const sqrt3$2 = sqrt(3);
+
+var asterisk = {
+ draw(context, size) {
+ const r = sqrt(size + min(size / 28, 0.75)) * 0.59436;
+ const t = r / 2;
+ const u = t * sqrt3$2;
+ context.moveTo(0, r);
+ context.lineTo(0, -r);
+ context.moveTo(-u, -t);
+ context.lineTo(u, t);
+ context.moveTo(-u, t);
+ context.lineTo(u, -t);
+ }
+};
+
+var circle = {
+ draw(context, size) {
+ const r = sqrt(size / pi);
+ context.moveTo(r, 0);
+ context.arc(0, 0, r, 0, tau);
+ }
+};
+
+var cross = {
+ draw(context, size) {
+ const r = sqrt(size / 5) / 2;
+ context.moveTo(-3 * r, -r);
+ context.lineTo(-r, -r);
+ context.lineTo(-r, -3 * r);
+ context.lineTo(r, -3 * r);
+ context.lineTo(r, -r);
+ context.lineTo(3 * r, -r);
+ context.lineTo(3 * r, r);
+ context.lineTo(r, r);
+ context.lineTo(r, 3 * r);
+ context.lineTo(-r, 3 * r);
+ context.lineTo(-r, r);
+ context.lineTo(-3 * r, r);
+ context.closePath();
+ }
+};
+
+const tan30 = sqrt(1 / 3);
+const tan30_2 = tan30 * 2;
+
+var diamond = {
+ draw(context, size) {
+ const y = sqrt(size / tan30_2);
+ const x = y * tan30;
+ context.moveTo(0, -y);
+ context.lineTo(x, 0);
+ context.lineTo(0, y);
+ context.lineTo(-x, 0);
+ context.closePath();
+ }
+};
+
+var diamond2 = {
+ draw(context, size) {
+ const r = sqrt(size) * 0.62625;
+ context.moveTo(0, -r);
+ context.lineTo(r, 0);
+ context.lineTo(0, r);
+ context.lineTo(-r, 0);
+ context.closePath();
+ }
+};
+
+var plus = {
+ draw(context, size) {
+ const r = sqrt(size - min(size / 7, 2)) * 0.87559;
+ context.moveTo(-r, 0);
+ context.lineTo(r, 0);
+ context.moveTo(0, r);
+ context.lineTo(0, -r);
+ }
+};
+
+var square = {
+ draw(context, size) {
+ const w = sqrt(size);
+ const x = -w / 2;
+ context.rect(x, x, w, w);
+ }
+};
+
+var square2 = {
+ draw(context, size) {
+ const r = sqrt(size) * 0.4431;
+ context.moveTo(r, r);
+ context.lineTo(r, -r);
+ context.lineTo(-r, -r);
+ context.lineTo(-r, r);
+ context.closePath();
+ }
+};
+
+const ka = 0.89081309152928522810;
+const kr = sin(pi / 10) / sin(7 * pi / 10);
+const kx = sin(tau / 10) * kr;
+const ky = -cos(tau / 10) * kr;
+
+var star = {
+ draw(context, size) {
+ const r = sqrt(size * ka);
+ const x = kx * r;
+ const y = ky * r;
+ context.moveTo(0, -r);
+ context.lineTo(x, y);
+ for (let i = 1; i < 5; ++i) {
+ const a = tau * i / 5;
+ const c = cos(a);
+ const s = sin(a);
+ context.lineTo(s * r, -c * r);
+ context.lineTo(c * x - s * y, s * x + c * y);
+ }
+ context.closePath();
+ }
+};
+
+const sqrt3$1 = sqrt(3);
+
+var triangle = {
+ draw(context, size) {
+ const y = -sqrt(size / (sqrt3$1 * 3));
+ context.moveTo(0, y * 2);
+ context.lineTo(-sqrt3$1 * y, -y);
+ context.lineTo(sqrt3$1 * y, -y);
+ context.closePath();
+ }
+};
+
+const sqrt3 = sqrt(3);
+
+var triangle2 = {
+ draw(context, size) {
+ const s = sqrt(size) * 0.6824;
+ const t = s / 2;
+ const u = (s * sqrt3) / 2; // cos(Math.PI / 6)
+ context.moveTo(0, -s);
+ context.lineTo(u, t);
+ context.lineTo(-u, t);
+ context.closePath();
+ }
+};
+
+const c = -0.5;
+const s = sqrt(3) / 2;
+const k = 1 / sqrt(12);
+const a = (k / 2 + 1) * 3;
+
+var wye = {
+ draw(context, size) {
+ const r = sqrt(size / a);
+ const x0 = r / 2, y0 = r * k;
+ const x1 = x0, y1 = r * k + r;
+ const x2 = -x1, y2 = y1;
+ context.moveTo(x0, y0);
+ context.lineTo(x1, y1);
+ context.lineTo(x2, y2);
+ context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
+ context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
+ context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
+ context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
+ context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
+ context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
+ context.closePath();
+ }
+};
+
+var times = {
+ draw(context, size) {
+ const r = sqrt(size - min(size / 6, 1.7)) * 0.6189;
+ context.moveTo(-r, -r);
+ context.lineTo(r, r);
+ context.moveTo(-r, r);
+ context.lineTo(r, -r);
+ }
+};
+
+// These symbols are designed to be filled.
+const symbolsFill = [
+ circle,
+ cross,
+ diamond,
+ square,
+ star,
+ triangle,
+ wye
+];
+
+// These symbols are designed to be stroked (with a width of 1.5px and round caps).
+const symbolsStroke = [
+ circle,
+ plus,
+ times,
+ triangle2,
+ asterisk,
+ square2,
+ diamond2
+];
+
+function Symbol$1(type, size) {
+ let context = null,
+ path = withPath(symbol);
+
+ type = typeof type === "function" ? type : constant$1(type || circle);
+ size = typeof size === "function" ? size : constant$1(size === undefined ? 64 : +size);
+
+ function symbol() {
+ let buffer;
+ if (!context) context = buffer = path();
+ type.apply(this, arguments).draw(context, +size.apply(this, arguments));
+ if (buffer) return context = null, buffer + "" || null;
+ }
+
+ symbol.type = function(_) {
+ return arguments.length ? (type = typeof _ === "function" ? _ : constant$1(_), symbol) : type;
+ };
+
+ symbol.size = function(_) {
+ return arguments.length ? (size = typeof _ === "function" ? _ : constant$1(+_), symbol) : size;
+ };
+
+ symbol.context = function(_) {
+ return arguments.length ? (context = _ == null ? null : _, symbol) : context;
+ };
+
+ return symbol;
+}
+
+function noop() {}
+
+function point$3(that, x, y) {
+ that._context.bezierCurveTo(
+ (2 * that._x0 + that._x1) / 3,
+ (2 * that._y0 + that._y1) / 3,
+ (that._x0 + 2 * that._x1) / 3,
+ (that._y0 + 2 * that._y1) / 3,
+ (that._x0 + 4 * that._x1 + x) / 6,
+ (that._y0 + 4 * that._y1 + y) / 6
+ );
+}
+
+function Basis(context) {
+ this._context = context;
+}
+
+Basis.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 =
+ this._y0 = this._y1 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 3: point$3(this, this._x1, this._y1); // falls through
+ case 2: this._context.lineTo(this._x1, this._y1); break;
+ }
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // falls through
+ default: point$3(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = x;
+ this._y0 = this._y1, this._y1 = y;
+ }
+};
+
+function basis(context) {
+ return new Basis(context);
+}
+
+function BasisClosed(context) {
+ this._context = context;
+}
+
+BasisClosed.prototype = {
+ areaStart: noop,
+ areaEnd: noop,
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
+ this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 1: {
+ this._context.moveTo(this._x2, this._y2);
+ this._context.closePath();
+ break;
+ }
+ case 2: {
+ this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
+ this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
+ this._context.closePath();
+ break;
+ }
+ case 3: {
+ this.point(this._x2, this._y2);
+ this.point(this._x3, this._y3);
+ this.point(this._x4, this._y4);
+ break;
+ }
+ }
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
+ case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
+ case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
+ default: point$3(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = x;
+ this._y0 = this._y1, this._y1 = y;
+ }
+};
+
+function basisClosed(context) {
+ return new BasisClosed(context);
+}
+
+function BasisOpen(context) {
+ this._context = context;
+}
+
+BasisOpen.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 =
+ this._y0 = this._y1 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
+ case 3: this._point = 4; // falls through
+ default: point$3(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = x;
+ this._y0 = this._y1, this._y1 = y;
+ }
+};
+
+function basisOpen(context) {
+ return new BasisOpen(context);
+}
+
+function Bundle(context, beta) {
+ this._basis = new Basis(context);
+ this._beta = beta;
+}
+
+Bundle.prototype = {
+ lineStart: function() {
+ this._x = [];
+ this._y = [];
+ this._basis.lineStart();
+ },
+ lineEnd: function() {
+ var x = this._x,
+ y = this._y,
+ j = x.length - 1;
+
+ if (j > 0) {
+ var x0 = x[0],
+ y0 = y[0],
+ dx = x[j] - x0,
+ dy = y[j] - y0,
+ i = -1,
+ t;
+
+ while (++i <= j) {
+ t = i / j;
+ this._basis.point(
+ this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
+ this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
+ );
+ }
+ }
+
+ this._x = this._y = null;
+ this._basis.lineEnd();
+ },
+ point: function(x, y) {
+ this._x.push(+x);
+ this._y.push(+y);
+ }
+};
+
+var bundle = (function custom(beta) {
+
+ function bundle(context) {
+ return beta === 1 ? new Basis(context) : new Bundle(context, beta);
+ }
+
+ bundle.beta = function(beta) {
+ return custom(+beta);
+ };
+
+ return bundle;
+})(0.85);
+
+function point$2(that, x, y) {
+ that._context.bezierCurveTo(
+ that._x1 + that._k * (that._x2 - that._x0),
+ that._y1 + that._k * (that._y2 - that._y0),
+ that._x2 + that._k * (that._x1 - x),
+ that._y2 + that._k * (that._y1 - y),
+ that._x2,
+ that._y2
+ );
+}
+
+function Cardinal(context, tension) {
+ this._context = context;
+ this._k = (1 - tension) / 6;
+}
+
+Cardinal.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 =
+ this._y0 = this._y1 = this._y2 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 2: this._context.lineTo(this._x2, this._y2); break;
+ case 3: point$2(this, this._x1, this._y1); break;
+ }
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
+ case 2: this._point = 3; // falls through
+ default: point$2(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var cardinal = (function custom(tension) {
+
+ function cardinal(context) {
+ return new Cardinal(context, tension);
+ }
+
+ cardinal.tension = function(tension) {
+ return custom(+tension);
+ };
+
+ return cardinal;
+})(0);
+
+function CardinalClosed(context, tension) {
+ this._context = context;
+ this._k = (1 - tension) / 6;
+}
+
+CardinalClosed.prototype = {
+ areaStart: noop,
+ areaEnd: noop,
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+ this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 1: {
+ this._context.moveTo(this._x3, this._y3);
+ this._context.closePath();
+ break;
+ }
+ case 2: {
+ this._context.lineTo(this._x3, this._y3);
+ this._context.closePath();
+ break;
+ }
+ case 3: {
+ this.point(this._x3, this._y3);
+ this.point(this._x4, this._y4);
+ this.point(this._x5, this._y5);
+ break;
+ }
+ }
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+ case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+ case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+ default: point$2(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var cardinalClosed = (function custom(tension) {
+
+ function cardinal(context) {
+ return new CardinalClosed(context, tension);
+ }
+
+ cardinal.tension = function(tension) {
+ return custom(+tension);
+ };
+
+ return cardinal;
+})(0);
+
+function CardinalOpen(context, tension) {
+ this._context = context;
+ this._k = (1 - tension) / 6;
+}
+
+CardinalOpen.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 =
+ this._y0 = this._y1 = this._y2 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+ case 3: this._point = 4; // falls through
+ default: point$2(this, x, y); break;
+ }
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var cardinalOpen = (function custom(tension) {
+
+ function cardinal(context) {
+ return new CardinalOpen(context, tension);
+ }
+
+ cardinal.tension = function(tension) {
+ return custom(+tension);
+ };
+
+ return cardinal;
+})(0);
+
+function point$1(that, x, y) {
+ var x1 = that._x1,
+ y1 = that._y1,
+ x2 = that._x2,
+ y2 = that._y2;
+
+ if (that._l01_a > epsilon) {
+ var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
+ n = 3 * that._l01_a * (that._l01_a + that._l12_a);
+ x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
+ y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
+ }
+
+ if (that._l23_a > epsilon) {
+ var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
+ m = 3 * that._l23_a * (that._l23_a + that._l12_a);
+ x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
+ y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
+ }
+
+ that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
+}
+
+function CatmullRom(context, alpha) {
+ this._context = context;
+ this._alpha = alpha;
+}
+
+CatmullRom.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 =
+ this._y0 = this._y1 = this._y2 = NaN;
+ this._l01_a = this._l12_a = this._l23_a =
+ this._l01_2a = this._l12_2a = this._l23_2a =
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 2: this._context.lineTo(this._x2, this._y2); break;
+ case 3: this.point(this._x2, this._y2); break;
+ }
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+
+ if (this._point) {
+ var x23 = this._x2 - x,
+ y23 = this._y2 - y;
+ this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+ }
+
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; // falls through
+ default: point$1(this, x, y); break;
+ }
+
+ this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+ this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var catmullRom = (function custom(alpha) {
+
+ function catmullRom(context) {
+ return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
+ }
+
+ catmullRom.alpha = function(alpha) {
+ return custom(+alpha);
+ };
+
+ return catmullRom;
+})(0.5);
+
+function CatmullRomClosed(context, alpha) {
+ this._context = context;
+ this._alpha = alpha;
+}
+
+CatmullRomClosed.prototype = {
+ areaStart: noop,
+ areaEnd: noop,
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+ this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+ this._l01_a = this._l12_a = this._l23_a =
+ this._l01_2a = this._l12_2a = this._l23_2a =
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 1: {
+ this._context.moveTo(this._x3, this._y3);
+ this._context.closePath();
+ break;
+ }
+ case 2: {
+ this._context.lineTo(this._x3, this._y3);
+ this._context.closePath();
+ break;
+ }
+ case 3: {
+ this.point(this._x3, this._y3);
+ this.point(this._x4, this._y4);
+ this.point(this._x5, this._y5);
+ break;
+ }
+ }
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+
+ if (this._point) {
+ var x23 = this._x2 - x,
+ y23 = this._y2 - y;
+ this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+ }
+
+ switch (this._point) {
+ case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+ case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+ case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+ default: point$1(this, x, y); break;
+ }
+
+ this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+ this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var catmullRomClosed = (function custom(alpha) {
+
+ function catmullRom(context) {
+ return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
+ }
+
+ catmullRom.alpha = function(alpha) {
+ return custom(+alpha);
+ };
+
+ return catmullRom;
+})(0.5);
+
+function CatmullRomOpen(context, alpha) {
+ this._context = context;
+ this._alpha = alpha;
+}
+
+CatmullRomOpen.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 = this._x2 =
+ this._y0 = this._y1 = this._y2 = NaN;
+ this._l01_a = this._l12_a = this._l23_a =
+ this._l01_2a = this._l12_2a = this._l23_2a =
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+
+ if (this._point) {
+ var x23 = this._x2 - x,
+ y23 = this._y2 - y;
+ this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+ }
+
+ switch (this._point) {
+ case 0: this._point = 1; break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+ case 3: this._point = 4; // falls through
+ default: point$1(this, x, y); break;
+ }
+
+ this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+ this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+ this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+ this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+ }
+};
+
+var catmullRomOpen = (function custom(alpha) {
+
+ function catmullRom(context) {
+ return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
+ }
+
+ catmullRom.alpha = function(alpha) {
+ return custom(+alpha);
+ };
+
+ return catmullRom;
+})(0.5);
+
+function LinearClosed(context) {
+ this._context = context;
+}
+
+LinearClosed.prototype = {
+ areaStart: noop,
+ areaEnd: noop,
+ lineStart: function() {
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (this._point) this._context.closePath();
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ if (this._point) this._context.lineTo(x, y);
+ else this._point = 1, this._context.moveTo(x, y);
+ }
+};
+
+function linearClosed(context) {
+ return new LinearClosed(context);
+}
+
+function sign(x) {
+ return x < 0 ? -1 : 1;
+}
+
+// Calculate the slopes of the tangents (Hermite-type interpolation) based on
+// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
+// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
+// NOV(II), P. 443, 1990.
+function slope3(that, x2, y2) {
+ var h0 = that._x1 - that._x0,
+ h1 = x2 - that._x1,
+ s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
+ s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
+ p = (s0 * h1 + s1 * h0) / (h0 + h1);
+ return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
+}
+
+// Calculate a one-sided slope.
+function slope2(that, t) {
+ var h = that._x1 - that._x0;
+ return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
+}
+
+// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
+// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
+// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
+function point(that, t0, t1) {
+ var x0 = that._x0,
+ y0 = that._y0,
+ x1 = that._x1,
+ y1 = that._y1,
+ dx = (x1 - x0) / 3;
+ that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
+}
+
+function MonotoneX(context) {
+ this._context = context;
+}
+
+MonotoneX.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x0 = this._x1 =
+ this._y0 = this._y1 =
+ this._t0 = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ switch (this._point) {
+ case 2: this._context.lineTo(this._x1, this._y1); break;
+ case 3: point(this, this._t0, slope2(this, this._t0)); break;
+ }
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ var t1 = NaN;
+
+ x = +x, y = +y;
+ if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; break;
+ case 2: this._point = 3; point(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
+ default: point(this, this._t0, t1 = slope3(this, x, y)); break;
+ }
+
+ this._x0 = this._x1, this._x1 = x;
+ this._y0 = this._y1, this._y1 = y;
+ this._t0 = t1;
+ }
+};
+
+function MonotoneY(context) {
+ this._context = new ReflectContext(context);
+}
+
+(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
+ MonotoneX.prototype.point.call(this, y, x);
+};
+
+function ReflectContext(context) {
+ this._context = context;
+}
+
+ReflectContext.prototype = {
+ moveTo: function(x, y) { this._context.moveTo(y, x); },
+ closePath: function() { this._context.closePath(); },
+ lineTo: function(x, y) { this._context.lineTo(y, x); },
+ bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
+};
+
+function monotoneX(context) {
+ return new MonotoneX(context);
+}
+
+function monotoneY(context) {
+ return new MonotoneY(context);
+}
+
+function Natural(context) {
+ this._context = context;
+}
+
+Natural.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x = [];
+ this._y = [];
+ },
+ lineEnd: function() {
+ var x = this._x,
+ y = this._y,
+ n = x.length;
+
+ if (n) {
+ this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
+ if (n === 2) {
+ this._context.lineTo(x[1], y[1]);
+ } else {
+ var px = controlPoints(x),
+ py = controlPoints(y);
+ for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
+ this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
+ }
+ }
+ }
+
+ if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
+ this._line = 1 - this._line;
+ this._x = this._y = null;
+ },
+ point: function(x, y) {
+ this._x.push(+x);
+ this._y.push(+y);
+ }
+};
+
+// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
+function controlPoints(x) {
+ var i,
+ n = x.length - 1,
+ m,
+ a = new Array(n),
+ b = new Array(n),
+ r = new Array(n);
+ a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
+ for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
+ a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
+ for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
+ a[n - 1] = r[n - 1] / b[n - 1];
+ for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
+ b[n - 1] = (x[n] + a[n - 1]) / 2;
+ for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
+ return [a, b];
+}
+
+function natural(context) {
+ return new Natural(context);
+}
+
+function Step(context, t) {
+ this._context = context;
+ this._t = t;
+}
+
+Step.prototype = {
+ areaStart: function() {
+ this._line = 0;
+ },
+ areaEnd: function() {
+ this._line = NaN;
+ },
+ lineStart: function() {
+ this._x = this._y = NaN;
+ this._point = 0;
+ },
+ lineEnd: function() {
+ if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
+ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+ if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
+ },
+ point: function(x, y) {
+ x = +x, y = +y;
+ switch (this._point) {
+ case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+ case 1: this._point = 2; // falls through
+ default: {
+ if (this._t <= 0) {
+ this._context.lineTo(this._x, y);
+ this._context.lineTo(x, y);
+ } else {
+ var x1 = this._x * (1 - this._t) + x * this._t;
+ this._context.lineTo(x1, this._y);
+ this._context.lineTo(x1, y);
+ }
+ break;
+ }
+ }
+ this._x = x, this._y = y;
+ }
+};
+
+function step(context) {
+ return new Step(context, 0.5);
+}
+
+function stepBefore(context) {
+ return new Step(context, 0);
+}
+
+function stepAfter(context) {
+ return new Step(context, 1);
+}
+
+function none$1(series, order) {
+ if (!((n = series.length) > 1)) return;
+ for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
+ s0 = s1, s1 = series[order[i]];
+ for (j = 0; j < m; ++j) {
+ s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
+ }
+ }
+}
+
+function none(series) {
+ var n = series.length, o = new Array(n);
+ while (--n >= 0) o[n] = n;
+ return o;
+}
+
+function stackValue(d, key) {
+ return d[key];
+}
+
+function stackSeries(key) {
+ const series = [];
+ series.key = key;
+ return series;
+}
+
+function stack() {
+ var keys = constant$1([]),
+ order = none,
+ offset = none$1,
+ value = stackValue;
+
+ function stack(data) {
+ var sz = Array.from(keys.apply(this, arguments), stackSeries),
+ i, n = sz.length, j = -1,
+ oz;
+
+ for (const d of data) {
+ for (i = 0, ++j; i < n; ++i) {
+ (sz[i][j] = [0, +value(d, sz[i].key, j, data)]).data = d;
+ }
+ }
+
+ for (i = 0, oz = array(order(sz)); i < n; ++i) {
+ sz[oz[i]].index = i;
+ }
+
+ offset(sz, oz);
+ return sz;
+ }
+
+ stack.keys = function(_) {
+ return arguments.length ? (keys = typeof _ === "function" ? _ : constant$1(Array.from(_)), stack) : keys;
+ };
+
+ stack.value = function(_) {
+ return arguments.length ? (value = typeof _ === "function" ? _ : constant$1(+_), stack) : value;
+ };
+
+ stack.order = function(_) {
+ return arguments.length ? (order = _ == null ? none : typeof _ === "function" ? _ : constant$1(Array.from(_)), stack) : order;
+ };
+
+ stack.offset = function(_) {
+ return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;
+ };
+
+ return stack;
+}
+
+function expand(series, order) {
+ if (!((n = series.length) > 0)) return;
+ for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
+ for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
+ if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
+ }
+ none$1(series, order);
+}
+
+function diverging(series, order) {
+ if (!((n = series.length) > 0)) return;
+ for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
+ for (yp = yn = 0, i = 0; i < n; ++i) {
+ if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {
+ d[0] = yp, d[1] = yp += dy;
+ } else if (dy < 0) {
+ d[1] = yn, d[0] = yn += dy;
+ } else {
+ d[0] = 0, d[1] = dy;
+ }
+ }
+ }
+}
+
+function silhouette(series, order) {
+ if (!((n = series.length) > 0)) return;
+ for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
+ for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
+ s0[j][1] += s0[j][0] = -y / 2;
+ }
+ none$1(series, order);
+}
+
+function wiggle(series, order) {
+ if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
+ for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
+ for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
+ var si = series[order[i]],
+ sij0 = si[j][1] || 0,
+ sij1 = si[j - 1][1] || 0,
+ s3 = (sij0 - sij1) / 2;
+ for (var k = 0; k < i; ++k) {
+ var sk = series[order[k]],
+ skj0 = sk[j][1] || 0,
+ skj1 = sk[j - 1][1] || 0;
+ s3 += skj0 - skj1;
+ }
+ s1 += sij0, s2 += s3 * sij0;
+ }
+ s0[j - 1][1] += s0[j - 1][0] = y;
+ if (s1) y -= s2 / s1;
+ }
+ s0[j - 1][1] += s0[j - 1][0] = y;
+ none$1(series, order);
+}
+
+function appearance(series) {
+ var peaks = series.map(peak);
+ return none(series).sort(function(a, b) { return peaks[a] - peaks[b]; });
+}
+
+function peak(series) {
+ var i = -1, j = 0, n = series.length, vi, vj = -Infinity;
+ while (++i < n) if ((vi = +series[i][1]) > vj) vj = vi, j = i;
+ return j;
+}
+
+function ascending(series) {
+ var sums = series.map(sum);
+ return none(series).sort(function(a, b) { return sums[a] - sums[b]; });
+}
+
+function sum(series) {
+ var s = 0, i = -1, n = series.length, v;
+ while (++i < n) if (v = +series[i][1]) s += v;
+ return s;
+}
+
+function descending(series) {
+ return ascending(series).reverse();
+}
+
+function insideOut(series) {
+ var n = series.length,
+ i,
+ j,
+ sums = series.map(sum),
+ order = appearance(series),
+ top = 0,
+ bottom = 0,
+ tops = [],
+ bottoms = [];
+
+ for (i = 0; i < n; ++i) {
+ j = order[i];
+ if (top < bottom) {
+ top += sums[j];
+ tops.push(j);
+ } else {
+ bottom += sums[j];
+ bottoms.push(j);
+ }
+ }
+
+ return bottoms.reverse().concat(tops);
+}
+
+function reverse(series) {
+ return none(series).reverse();
+}
+
+var constant = x => () => x;
+
+function ZoomEvent(type, {
+ sourceEvent,
+ target,
+ transform,
+ dispatch
+}) {
+ Object.defineProperties(this, {
+ type: {value: type, enumerable: true, configurable: true},
+ sourceEvent: {value: sourceEvent, enumerable: true, configurable: true},
+ target: {value: target, enumerable: true, configurable: true},
+ transform: {value: transform, enumerable: true, configurable: true},
+ _: {value: dispatch}
+ });
+}
+
+function Transform(k, x, y) {
+ this.k = k;
+ this.x = x;
+ this.y = y;
+}
+
+Transform.prototype = {
+ constructor: Transform,
+ scale: function(k) {
+ return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+ },
+ translate: function(x, y) {
+ return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+ },
+ apply: function(point) {
+ return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+ },
+ applyX: function(x) {
+ return x * this.k + this.x;
+ },
+ applyY: function(y) {
+ return y * this.k + this.y;
+ },
+ invert: function(location) {
+ return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+ },
+ invertX: function(x) {
+ return (x - this.x) / this.k;
+ },
+ invertY: function(y) {
+ return (y - this.y) / this.k;
+ },
+ rescaleX: function(x) {
+ return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+ },
+ rescaleY: function(y) {
+ return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+ },
+ toString: function() {
+ return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+ }
+};
+
+var identity = new Transform(1, 0, 0);
+
+transform.prototype = Transform.prototype;
+
+function transform(node) {
+ while (!node.__zoom) if (!(node = node.parentNode)) return identity;
+ return node.__zoom;
+}
+
+function nopropagation(event) {
+ event.stopImmediatePropagation();
+}
+
+function noevent(event) {
+ event.preventDefault();
+ event.stopImmediatePropagation();
+}
+
+// Ignore right-click, since that should open the context menu.
+// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
+function defaultFilter(event) {
+ return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+}
+
+function defaultExtent() {
+ var e = this;
+ if (e instanceof SVGElement) {
+ e = e.ownerSVGElement || e;
+ if (e.hasAttribute("viewBox")) {
+ e = e.viewBox.baseVal;
+ return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+ }
+ return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+ }
+ return [[0, 0], [e.clientWidth, e.clientHeight]];
+}
+
+function defaultTransform() {
+ return this.__zoom || identity;
+}
+
+function defaultWheelDelta(event) {
+ return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+}
+
+function defaultTouchable() {
+ return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
+function defaultConstrain(transform, extent, translateExtent) {
+ var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+ dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+ dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+ dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+ return transform.translate(
+ dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
+ dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
+ );
+}
+
+function zoom() {
+ var filter = defaultFilter,
+ extent = defaultExtent,
+ constrain = defaultConstrain,
+ wheelDelta = defaultWheelDelta,
+ touchable = defaultTouchable,
+ scaleExtent = [0, Infinity],
+ translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+ duration = 250,
+ interpolate = interpolateZoom,
+ listeners = dispatch("start", "zoom", "end"),
+ touchstarting,
+ touchfirst,
+ touchending,
+ touchDelay = 500,
+ wheelDelay = 150,
+ clickDistance2 = 0,
+ tapDistance = 10;
+
+ function zoom(selection) {
+ selection
+ .property("__zoom", defaultTransform)
+ .on("wheel.zoom", wheeled, {passive: false})
+ .on("mousedown.zoom", mousedowned)
+ .on("dblclick.zoom", dblclicked)
+ .filter(touchable)
+ .on("touchstart.zoom", touchstarted)
+ .on("touchmove.zoom", touchmoved)
+ .on("touchend.zoom touchcancel.zoom", touchended)
+ .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+ }
+
+ zoom.transform = function(collection, transform, point, event) {
+ var selection = collection.selection ? collection.selection() : collection;
+ selection.property("__zoom", defaultTransform);
+ if (collection !== selection) {
+ schedule(collection, transform, point, event);
+ } else {
+ selection.interrupt().each(function() {
+ gesture(this, arguments)
+ .event(event)
+ .start()
+ .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
+ .end();
+ });
+ }
+ };
+
+ zoom.scaleBy = function(selection, k, p, event) {
+ zoom.scaleTo(selection, function() {
+ var k0 = this.__zoom.k,
+ k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+ return k0 * k1;
+ }, p, event);
+ };
+
+ zoom.scaleTo = function(selection, k, p, event) {
+ zoom.transform(selection, function() {
+ var e = extent.apply(this, arguments),
+ t0 = this.__zoom,
+ p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+ p1 = t0.invert(p0),
+ k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+ return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+ }, p, event);
+ };
+
+ zoom.translateBy = function(selection, x, y, event) {
+ zoom.transform(selection, function() {
+ return constrain(this.__zoom.translate(
+ typeof x === "function" ? x.apply(this, arguments) : x,
+ typeof y === "function" ? y.apply(this, arguments) : y
+ ), extent.apply(this, arguments), translateExtent);
+ }, null, event);
+ };
+
+ zoom.translateTo = function(selection, x, y, p, event) {
+ zoom.transform(selection, function() {
+ var e = extent.apply(this, arguments),
+ t = this.__zoom,
+ p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+ return constrain(identity.translate(p0[0], p0[1]).scale(t.k).translate(
+ typeof x === "function" ? -x.apply(this, arguments) : -x,
+ typeof y === "function" ? -y.apply(this, arguments) : -y
+ ), e, translateExtent);
+ }, p, event);
+ };
+
+ function scale(transform, k) {
+ k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+ return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+ }
+
+ function translate(transform, p0, p1) {
+ var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+ return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+ }
+
+ function centroid(extent) {
+ return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+ }
+
+ function schedule(transition, transform, point, event) {
+ transition
+ .on("start.zoom", function() { gesture(this, arguments).event(event).start(); })
+ .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).event(event).end(); })
+ .tween("zoom", function() {
+ var that = this,
+ args = arguments,
+ g = gesture(that, args).event(event),
+ e = extent.apply(that, args),
+ p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+ w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+ a = that.__zoom,
+ b = typeof transform === "function" ? transform.apply(that, args) : transform,
+ i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+ return function(t) {
+ if (t === 1) t = b; // Avoid rounding error on end.
+ else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
+ g.zoom(null, t);
+ };
+ });
+ }
+
+ function gesture(that, args, clean) {
+ return (!clean && that.__zooming) || new Gesture(that, args);
+ }
+
+ function Gesture(that, args) {
+ this.that = that;
+ this.args = args;
+ this.active = 0;
+ this.sourceEvent = null;
+ this.extent = extent.apply(that, args);
+ this.taps = 0;
+ }
+
+ Gesture.prototype = {
+ event: function(event) {
+ if (event) this.sourceEvent = event;
+ return this;
+ },
+ start: function() {
+ if (++this.active === 1) {
+ this.that.__zooming = this;
+ this.emit("start");
+ }
+ return this;
+ },
+ zoom: function(key, transform) {
+ if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+ if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+ if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+ this.that.__zoom = transform;
+ this.emit("zoom");
+ return this;
+ },
+ end: function() {
+ if (--this.active === 0) {
+ delete this.that.__zooming;
+ this.emit("end");
+ }
+ return this;
+ },
+ emit: function(type) {
+ var d = select(this.that).datum();
+ listeners.call(
+ type,
+ this.that,
+ new ZoomEvent(type, {
+ sourceEvent: this.sourceEvent,
+ target: zoom,
+ type,
+ transform: this.that.__zoom,
+ dispatch: listeners
+ }),
+ d
+ );
+ }
+ };
+
+ function wheeled(event, ...args) {
+ if (!filter.apply(this, arguments)) return;
+ var g = gesture(this, args).event(event),
+ t = this.__zoom,
+ k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+ p = pointer(event);
+
+ // If the mouse is in the same location as before, reuse it.
+ // If there were recent wheel events, reset the wheel idle timeout.
+ if (g.wheel) {
+ if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+ g.mouse[1] = t.invert(g.mouse[0] = p);
+ }
+ clearTimeout(g.wheel);
+ }
+
+ // If this wheel event won’t trigger a transform change, ignore it.
+ else if (t.k === k) return;
+
+ // Otherwise, capture the mouse point and location at the start.
+ else {
+ g.mouse = [p, t.invert(p)];
+ interrupt(this);
+ g.start();
+ }
+
+ noevent(event);
+ g.wheel = setTimeout(wheelidled, wheelDelay);
+ g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+
+ function wheelidled() {
+ g.wheel = null;
+ g.end();
+ }
+ }
+
+ function mousedowned(event, ...args) {
+ if (touchending || !filter.apply(this, arguments)) return;
+ var currentTarget = event.currentTarget,
+ g = gesture(this, args, true).event(event),
+ v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+ p = pointer(event, currentTarget),
+ x0 = event.clientX,
+ y0 = event.clientY;
+
+ dragDisable(event.view);
+ nopropagation(event);
+ g.mouse = [p, this.__zoom.invert(p)];
+ interrupt(this);
+ g.start();
+
+ function mousemoved(event) {
+ noevent(event);
+ if (!g.moved) {
+ var dx = event.clientX - x0, dy = event.clientY - y0;
+ g.moved = dx * dx + dy * dy > clickDistance2;
+ }
+ g.event(event)
+ .zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+ }
+
+ function mouseupped(event) {
+ v.on("mousemove.zoom mouseup.zoom", null);
+ yesdrag(event.view, g.moved);
+ noevent(event);
+ g.event(event).end();
+ }
+ }
+
+ function dblclicked(event, ...args) {
+ if (!filter.apply(this, arguments)) return;
+ var t0 = this.__zoom,
+ p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+ p1 = t0.invert(p0),
+ k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+ t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+
+ noevent(event);
+ if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);
+ else select(this).call(zoom.transform, t1, p0, event);
+ }
+
+ function touchstarted(event, ...args) {
+ if (!filter.apply(this, arguments)) return;
+ var touches = event.touches,
+ n = touches.length,
+ g = gesture(this, args, event.changedTouches.length === n).event(event),
+ started, i, t, p;
+
+ nopropagation(event);
+ for (i = 0; i < n; ++i) {
+ t = touches[i], p = pointer(t, this);
+ p = [p, this.__zoom.invert(p), t.identifier];
+ if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;
+ else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+ }
+
+ if (touchstarting) touchstarting = clearTimeout(touchstarting);
+
+ if (started) {
+ if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+ interrupt(this);
+ g.start();
+ }
+ }
+
+ function touchmoved(event, ...args) {
+ if (!this.__zooming) return;
+ var g = gesture(this, args).event(event),
+ touches = event.changedTouches,
+ n = touches.length, i, t, p, l;
+
+ noevent(event);
+ for (i = 0; i < n; ++i) {
+ t = touches[i], p = pointer(t, this);
+ if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
+ else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+ }
+ t = g.that.__zoom;
+ if (g.touch1) {
+ var p0 = g.touch0[0], l0 = g.touch0[1],
+ p1 = g.touch1[0], l1 = g.touch1[1],
+ dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+ dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+ t = scale(t, Math.sqrt(dp / dl));
+ p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+ l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+ }
+ else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
+ else return;
+
+ g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+ }
+
+ function touchended(event, ...args) {
+ if (!this.__zooming) return;
+ var g = gesture(this, args).event(event),
+ touches = event.changedTouches,
+ n = touches.length, i, t;
+
+ nopropagation(event);
+ if (touchending) clearTimeout(touchending);
+ touchending = setTimeout(function() { touchending = null; }, touchDelay);
+ for (i = 0; i < n; ++i) {
+ t = touches[i];
+ if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
+ else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+ }
+ if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+ if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
+ else {
+ g.end();
+ // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
+ if (g.taps === 2) {
+ t = pointer(t, this);
+ if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+ var p = select(this).on("dblclick.zoom");
+ if (p) p.apply(this, arguments);
+ }
+ }
+ }
+ }
+
+ zoom.wheelDelta = function(_) {
+ return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+ };
+
+ zoom.filter = function(_) {
+ return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+ };
+
+ zoom.touchable = function(_) {
+ return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
+ };
+
+ zoom.extent = function(_) {
+ return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+ };
+
+ zoom.scaleExtent = function(_) {
+ return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+ };
+
+ zoom.translateExtent = function(_) {
+ return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+ };
+
+ zoom.constrain = function(_) {
+ return arguments.length ? (constrain = _, zoom) : constrain;
+ };
+
+ zoom.duration = function(_) {
+ return arguments.length ? (duration = +_, zoom) : duration;
+ };
+
+ zoom.interpolate = function(_) {
+ return arguments.length ? (interpolate = _, zoom) : interpolate;
+ };
+
+ zoom.on = function() {
+ var value = listeners.on.apply(listeners, arguments);
+ return value === listeners ? zoom : value;
+ };
+
+ zoom.clickDistance = function(_) {
+ return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+ };
+
+ zoom.tapDistance = function(_) {
+ return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+ };
+
+ return zoom;
+}
+
+exports.Adder = Adder;
+exports.Delaunay = Delaunay;
+exports.FormatSpecifier = FormatSpecifier;
+exports.InternMap = InternMap;
+exports.InternSet = InternSet;
+exports.Node = Node$1;
+exports.Path = Path$1;
+exports.Voronoi = Voronoi;
+exports.ZoomTransform = Transform;
+exports.active = active;
+exports.arc = arc;
+exports.area = area;
+exports.areaRadial = areaRadial;
+exports.ascending = ascending$3;
+exports.autoType = autoType;
+exports.axisBottom = axisBottom;
+exports.axisLeft = axisLeft;
+exports.axisRight = axisRight;
+exports.axisTop = axisTop;
+exports.bin = bin;
+exports.bisect = bisect;
+exports.bisectCenter = bisectCenter;
+exports.bisectLeft = bisectLeft;
+exports.bisectRight = bisectRight;
+exports.bisector = bisector;
+exports.blob = blob;
+exports.blur = blur;
+exports.blur2 = blur2;
+exports.blurImage = blurImage;
+exports.brush = brush;
+exports.brushSelection = brushSelection;
+exports.brushX = brushX;
+exports.brushY = brushY;
+exports.buffer = buffer;
+exports.chord = chord;
+exports.chordDirected = chordDirected;
+exports.chordTranspose = chordTranspose;
+exports.cluster = cluster;
+exports.color = color;
+exports.contourDensity = density;
+exports.contours = Contours;
+exports.count = count$1;
+exports.create = create$1;
+exports.creator = creator;
+exports.cross = cross$2;
+exports.csv = csv;
+exports.csvFormat = csvFormat;
+exports.csvFormatBody = csvFormatBody;
+exports.csvFormatRow = csvFormatRow;
+exports.csvFormatRows = csvFormatRows;
+exports.csvFormatValue = csvFormatValue;
+exports.csvParse = csvParse;
+exports.csvParseRows = csvParseRows;
+exports.cubehelix = cubehelix$3;
+exports.cumsum = cumsum;
+exports.curveBasis = basis;
+exports.curveBasisClosed = basisClosed;
+exports.curveBasisOpen = basisOpen;
+exports.curveBumpX = bumpX;
+exports.curveBumpY = bumpY;
+exports.curveBundle = bundle;
+exports.curveCardinal = cardinal;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveLinear = curveLinear;
+exports.curveLinearClosed = linearClosed;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.descending = descending$2;
+exports.deviation = deviation;
+exports.difference = difference;
+exports.disjoint = disjoint;
+exports.dispatch = dispatch;
+exports.drag = drag;
+exports.dragDisable = dragDisable;
+exports.dragEnable = yesdrag;
+exports.dsv = dsv;
+exports.dsvFormat = dsvFormat;
+exports.easeBack = backInOut;
+exports.easeBackIn = backIn;
+exports.easeBackInOut = backInOut;
+exports.easeBackOut = backOut;
+exports.easeBounce = bounceOut;
+exports.easeBounceIn = bounceIn;
+exports.easeBounceInOut = bounceInOut;
+exports.easeBounceOut = bounceOut;
+exports.easeCircle = circleInOut;
+exports.easeCircleIn = circleIn;
+exports.easeCircleInOut = circleInOut;
+exports.easeCircleOut = circleOut;
+exports.easeCubic = cubicInOut;
+exports.easeCubicIn = cubicIn;
+exports.easeCubicInOut = cubicInOut;
+exports.easeCubicOut = cubicOut;
+exports.easeElastic = elasticOut;
+exports.easeElasticIn = elasticIn;
+exports.easeElasticInOut = elasticInOut;
+exports.easeElasticOut = elasticOut;
+exports.easeExp = expInOut;
+exports.easeExpIn = expIn;
+exports.easeExpInOut = expInOut;
+exports.easeExpOut = expOut;
+exports.easeLinear = linear$1;
+exports.easePoly = polyInOut;
+exports.easePolyIn = polyIn;
+exports.easePolyInOut = polyInOut;
+exports.easePolyOut = polyOut;
+exports.easeQuad = quadInOut;
+exports.easeQuadIn = quadIn;
+exports.easeQuadInOut = quadInOut;
+exports.easeQuadOut = quadOut;
+exports.easeSin = sinInOut;
+exports.easeSinIn = sinIn;
+exports.easeSinInOut = sinInOut;
+exports.easeSinOut = sinOut;
+exports.every = every;
+exports.extent = extent$1;
+exports.fcumsum = fcumsum;
+exports.filter = filter$1;
+exports.flatGroup = flatGroup;
+exports.flatRollup = flatRollup;
+exports.forceCenter = center;
+exports.forceCollide = collide;
+exports.forceLink = link$2;
+exports.forceManyBody = manyBody;
+exports.forceRadial = radial$1;
+exports.forceSimulation = simulation;
+exports.forceX = x$1;
+exports.forceY = y$1;
+exports.formatDefaultLocale = defaultLocale$1;
+exports.formatLocale = formatLocale$1;
+exports.formatSpecifier = formatSpecifier;
+exports.fsum = fsum;
+exports.geoAlbers = albers;
+exports.geoAlbersUsa = albersUsa;
+exports.geoArea = area$2;
+exports.geoAzimuthalEqualArea = azimuthalEqualArea;
+exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
+exports.geoAzimuthalEquidistant = azimuthalEquidistant;
+exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
+exports.geoBounds = bounds;
+exports.geoCentroid = centroid$1;
+exports.geoCircle = circle$1;
+exports.geoClipAntimeridian = clipAntimeridian;
+exports.geoClipCircle = clipCircle;
+exports.geoClipExtent = extent;
+exports.geoClipRectangle = clipRectangle;
+exports.geoConicConformal = conicConformal;
+exports.geoConicConformalRaw = conicConformalRaw;
+exports.geoConicEqualArea = conicEqualArea;
+exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
+exports.geoConicEquidistant = conicEquidistant;
+exports.geoConicEquidistantRaw = conicEquidistantRaw;
+exports.geoContains = contains$1;
+exports.geoDistance = distance;
+exports.geoEqualEarth = equalEarth;
+exports.geoEqualEarthRaw = equalEarthRaw;
+exports.geoEquirectangular = equirectangular;
+exports.geoEquirectangularRaw = equirectangularRaw;
+exports.geoGnomonic = gnomonic;
+exports.geoGnomonicRaw = gnomonicRaw;
+exports.geoGraticule = graticule;
+exports.geoGraticule10 = graticule10;
+exports.geoIdentity = identity$4;
+exports.geoInterpolate = interpolate;
+exports.geoLength = length$1;
+exports.geoMercator = mercator;
+exports.geoMercatorRaw = mercatorRaw;
+exports.geoNaturalEarth1 = naturalEarth1;
+exports.geoNaturalEarth1Raw = naturalEarth1Raw;
+exports.geoOrthographic = orthographic;
+exports.geoOrthographicRaw = orthographicRaw;
+exports.geoPath = index$2;
+exports.geoProjection = projection;
+exports.geoProjectionMutator = projectionMutator;
+exports.geoRotation = rotation;
+exports.geoStereographic = stereographic;
+exports.geoStereographicRaw = stereographicRaw;
+exports.geoStream = geoStream;
+exports.geoTransform = transform$1;
+exports.geoTransverseMercator = transverseMercator;
+exports.geoTransverseMercatorRaw = transverseMercatorRaw;
+exports.gray = gray;
+exports.greatest = greatest;
+exports.greatestIndex = greatestIndex;
+exports.group = group;
+exports.groupSort = groupSort;
+exports.groups = groups;
+exports.hcl = hcl$2;
+exports.hierarchy = hierarchy;
+exports.histogram = bin;
+exports.hsl = hsl$2;
+exports.html = html;
+exports.image = image;
+exports.index = index$4;
+exports.indexes = indexes;
+exports.interpolate = interpolate$2;
+exports.interpolateArray = array$3;
+exports.interpolateBasis = basis$2;
+exports.interpolateBasisClosed = basisClosed$1;
+exports.interpolateBlues = Blues;
+exports.interpolateBrBG = BrBG;
+exports.interpolateBuGn = BuGn;
+exports.interpolateBuPu = BuPu;
+exports.interpolateCividis = cividis;
+exports.interpolateCool = cool;
+exports.interpolateCubehelix = cubehelix$2;
+exports.interpolateCubehelixDefault = cubehelix;
+exports.interpolateCubehelixLong = cubehelixLong;
+exports.interpolateDate = date$1;
+exports.interpolateDiscrete = discrete;
+exports.interpolateGnBu = GnBu;
+exports.interpolateGreens = Greens;
+exports.interpolateGreys = Greys;
+exports.interpolateHcl = hcl$1;
+exports.interpolateHclLong = hclLong;
+exports.interpolateHsl = hsl$1;
+exports.interpolateHslLong = hslLong;
+exports.interpolateHue = hue;
+exports.interpolateInferno = inferno;
+exports.interpolateLab = lab;
+exports.interpolateMagma = magma;
+exports.interpolateNumber = interpolateNumber;
+exports.interpolateNumberArray = numberArray;
+exports.interpolateObject = object$1;
+exports.interpolateOrRd = OrRd;
+exports.interpolateOranges = Oranges;
+exports.interpolatePRGn = PRGn;
+exports.interpolatePiYG = PiYG;
+exports.interpolatePlasma = plasma;
+exports.interpolatePuBu = PuBu;
+exports.interpolatePuBuGn = PuBuGn;
+exports.interpolatePuOr = PuOr;
+exports.interpolatePuRd = PuRd;
+exports.interpolatePurples = Purples;
+exports.interpolateRainbow = rainbow;
+exports.interpolateRdBu = RdBu;
+exports.interpolateRdGy = RdGy;
+exports.interpolateRdPu = RdPu;
+exports.interpolateRdYlBu = RdYlBu;
+exports.interpolateRdYlGn = RdYlGn;
+exports.interpolateReds = Reds;
+exports.interpolateRgb = interpolateRgb;
+exports.interpolateRgbBasis = rgbBasis;
+exports.interpolateRgbBasisClosed = rgbBasisClosed;
+exports.interpolateRound = interpolateRound;
+exports.interpolateSinebow = sinebow;
+exports.interpolateSpectral = Spectral;
+exports.interpolateString = interpolateString;
+exports.interpolateTransformCss = interpolateTransformCss;
+exports.interpolateTransformSvg = interpolateTransformSvg;
+exports.interpolateTurbo = turbo;
+exports.interpolateViridis = viridis;
+exports.interpolateWarm = warm;
+exports.interpolateYlGn = YlGn;
+exports.interpolateYlGnBu = YlGnBu;
+exports.interpolateYlOrBr = YlOrBr;
+exports.interpolateYlOrRd = YlOrRd;
+exports.interpolateZoom = interpolateZoom;
+exports.interrupt = interrupt;
+exports.intersection = intersection;
+exports.interval = interval;
+exports.isoFormat = formatIso$1;
+exports.isoParse = parseIso$1;
+exports.json = json;
+exports.lab = lab$1;
+exports.lch = lch;
+exports.least = least;
+exports.leastIndex = leastIndex;
+exports.line = line;
+exports.lineRadial = lineRadial$1;
+exports.link = link;
+exports.linkHorizontal = linkHorizontal;
+exports.linkRadial = linkRadial;
+exports.linkVertical = linkVertical;
+exports.local = local$1;
+exports.map = map$1;
+exports.matcher = matcher;
+exports.max = max$3;
+exports.maxIndex = maxIndex;
+exports.mean = mean;
+exports.median = median;
+exports.medianIndex = medianIndex;
+exports.merge = merge;
+exports.min = min$2;
+exports.minIndex = minIndex;
+exports.mode = mode;
+exports.namespace = namespace;
+exports.namespaces = namespaces;
+exports.nice = nice$1;
+exports.now = now;
+exports.pack = index$1;
+exports.packEnclose = enclose;
+exports.packSiblings = siblings;
+exports.pairs = pairs;
+exports.partition = partition;
+exports.path = path;
+exports.pathRound = pathRound;
+exports.permute = permute;
+exports.pie = pie;
+exports.piecewise = piecewise;
+exports.pointRadial = pointRadial;
+exports.pointer = pointer;
+exports.pointers = pointers;
+exports.polygonArea = area$1;
+exports.polygonCentroid = centroid;
+exports.polygonContains = contains;
+exports.polygonHull = hull;
+exports.polygonLength = length;
+exports.precisionFixed = precisionFixed;
+exports.precisionPrefix = precisionPrefix;
+exports.precisionRound = precisionRound;
+exports.quadtree = quadtree;
+exports.quantile = quantile$1;
+exports.quantileIndex = quantileIndex;
+exports.quantileSorted = quantileSorted;
+exports.quantize = quantize$1;
+exports.quickselect = quickselect;
+exports.radialArea = areaRadial;
+exports.radialLine = lineRadial$1;
+exports.randomBates = bates;
+exports.randomBernoulli = bernoulli;
+exports.randomBeta = beta;
+exports.randomBinomial = binomial;
+exports.randomCauchy = cauchy;
+exports.randomExponential = exponential;
+exports.randomGamma = gamma;
+exports.randomGeometric = geometric;
+exports.randomInt = int;
+exports.randomIrwinHall = irwinHall;
+exports.randomLcg = lcg;
+exports.randomLogNormal = logNormal;
+exports.randomLogistic = logistic;
+exports.randomNormal = normal;
+exports.randomPareto = pareto;
+exports.randomPoisson = poisson;
+exports.randomUniform = uniform;
+exports.randomWeibull = weibull;
+exports.range = range$2;
+exports.rank = rank;
+exports.reduce = reduce;
+exports.reverse = reverse$1;
+exports.rgb = rgb;
+exports.ribbon = ribbon$1;
+exports.ribbonArrow = ribbonArrow;
+exports.rollup = rollup;
+exports.rollups = rollups;
+exports.scaleBand = band;
+exports.scaleDiverging = diverging$1;
+exports.scaleDivergingLog = divergingLog;
+exports.scaleDivergingPow = divergingPow;
+exports.scaleDivergingSqrt = divergingSqrt;
+exports.scaleDivergingSymlog = divergingSymlog;
+exports.scaleIdentity = identity$2;
+exports.scaleImplicit = implicit;
+exports.scaleLinear = linear;
+exports.scaleLog = log;
+exports.scaleOrdinal = ordinal;
+exports.scalePoint = point$4;
+exports.scalePow = pow;
+exports.scaleQuantile = quantile;
+exports.scaleQuantize = quantize;
+exports.scaleRadial = radial;
+exports.scaleSequential = sequential;
+exports.scaleSequentialLog = sequentialLog;
+exports.scaleSequentialPow = sequentialPow;
+exports.scaleSequentialQuantile = sequentialQuantile;
+exports.scaleSequentialSqrt = sequentialSqrt;
+exports.scaleSequentialSymlog = sequentialSymlog;
+exports.scaleSqrt = sqrt$1;
+exports.scaleSymlog = symlog;
+exports.scaleThreshold = threshold;
+exports.scaleTime = time;
+exports.scaleUtc = utcTime;
+exports.scan = scan;
+exports.schemeAccent = Accent;
+exports.schemeBlues = scheme$5;
+exports.schemeBrBG = scheme$q;
+exports.schemeBuGn = scheme$h;
+exports.schemeBuPu = scheme$g;
+exports.schemeCategory10 = category10;
+exports.schemeDark2 = Dark2;
+exports.schemeGnBu = scheme$f;
+exports.schemeGreens = scheme$4;
+exports.schemeGreys = scheme$3;
+exports.schemeObservable10 = observable10;
+exports.schemeOrRd = scheme$e;
+exports.schemeOranges = scheme;
+exports.schemePRGn = scheme$p;
+exports.schemePaired = Paired;
+exports.schemePastel1 = Pastel1;
+exports.schemePastel2 = Pastel2;
+exports.schemePiYG = scheme$o;
+exports.schemePuBu = scheme$c;
+exports.schemePuBuGn = scheme$d;
+exports.schemePuOr = scheme$n;
+exports.schemePuRd = scheme$b;
+exports.schemePurples = scheme$2;
+exports.schemeRdBu = scheme$m;
+exports.schemeRdGy = scheme$l;
+exports.schemeRdPu = scheme$a;
+exports.schemeRdYlBu = scheme$k;
+exports.schemeRdYlGn = scheme$j;
+exports.schemeReds = scheme$1;
+exports.schemeSet1 = Set1;
+exports.schemeSet2 = Set2;
+exports.schemeSet3 = Set3;
+exports.schemeSpectral = scheme$i;
+exports.schemeTableau10 = Tableau10;
+exports.schemeYlGn = scheme$8;
+exports.schemeYlGnBu = scheme$9;
+exports.schemeYlOrBr = scheme$7;
+exports.schemeYlOrRd = scheme$6;
+exports.select = select;
+exports.selectAll = selectAll;
+exports.selection = selection;
+exports.selector = selector;
+exports.selectorAll = selectorAll;
+exports.shuffle = shuffle$1;
+exports.shuffler = shuffler;
+exports.some = some;
+exports.sort = sort;
+exports.stack = stack;
+exports.stackOffsetDiverging = diverging;
+exports.stackOffsetExpand = expand;
+exports.stackOffsetNone = none$1;
+exports.stackOffsetSilhouette = silhouette;
+exports.stackOffsetWiggle = wiggle;
+exports.stackOrderAppearance = appearance;
+exports.stackOrderAscending = ascending;
+exports.stackOrderDescending = descending;
+exports.stackOrderInsideOut = insideOut;
+exports.stackOrderNone = none;
+exports.stackOrderReverse = reverse;
+exports.stratify = stratify;
+exports.style = styleValue;
+exports.subset = subset;
+exports.sum = sum$2;
+exports.superset = superset;
+exports.svg = svg;
+exports.symbol = Symbol$1;
+exports.symbolAsterisk = asterisk;
+exports.symbolCircle = circle;
+exports.symbolCross = cross;
+exports.symbolDiamond = diamond;
+exports.symbolDiamond2 = diamond2;
+exports.symbolPlus = plus;
+exports.symbolSquare = square;
+exports.symbolSquare2 = square2;
+exports.symbolStar = star;
+exports.symbolTimes = times;
+exports.symbolTriangle = triangle;
+exports.symbolTriangle2 = triangle2;
+exports.symbolWye = wye;
+exports.symbolX = times;
+exports.symbols = symbolsFill;
+exports.symbolsFill = symbolsFill;
+exports.symbolsStroke = symbolsStroke;
+exports.text = text;
+exports.thresholdFreedmanDiaconis = thresholdFreedmanDiaconis;
+exports.thresholdScott = thresholdScott;
+exports.thresholdSturges = thresholdSturges;
+exports.tickFormat = tickFormat;
+exports.tickIncrement = tickIncrement;
+exports.tickStep = tickStep;
+exports.ticks = ticks;
+exports.timeDay = timeDay;
+exports.timeDays = timeDays;
+exports.timeFormatDefaultLocale = defaultLocale;
+exports.timeFormatLocale = formatLocale;
+exports.timeFriday = timeFriday;
+exports.timeFridays = timeFridays;
+exports.timeHour = timeHour;
+exports.timeHours = timeHours;
+exports.timeInterval = timeInterval;
+exports.timeMillisecond = millisecond;
+exports.timeMilliseconds = milliseconds;
+exports.timeMinute = timeMinute;
+exports.timeMinutes = timeMinutes;
+exports.timeMonday = timeMonday;
+exports.timeMondays = timeMondays;
+exports.timeMonth = timeMonth;
+exports.timeMonths = timeMonths;
+exports.timeSaturday = timeSaturday;
+exports.timeSaturdays = timeSaturdays;
+exports.timeSecond = second;
+exports.timeSeconds = seconds;
+exports.timeSunday = timeSunday;
+exports.timeSundays = timeSundays;
+exports.timeThursday = timeThursday;
+exports.timeThursdays = timeThursdays;
+exports.timeTickInterval = timeTickInterval;
+exports.timeTicks = timeTicks;
+exports.timeTuesday = timeTuesday;
+exports.timeTuesdays = timeTuesdays;
+exports.timeWednesday = timeWednesday;
+exports.timeWednesdays = timeWednesdays;
+exports.timeWeek = timeSunday;
+exports.timeWeeks = timeSundays;
+exports.timeYear = timeYear;
+exports.timeYears = timeYears;
+exports.timeout = timeout;
+exports.timer = timer;
+exports.timerFlush = timerFlush;
+exports.transition = transition;
+exports.transpose = transpose;
+exports.tree = tree;
+exports.treemap = index;
+exports.treemapBinary = binary;
+exports.treemapDice = treemapDice;
+exports.treemapResquarify = resquarify;
+exports.treemapSlice = treemapSlice;
+exports.treemapSliceDice = sliceDice;
+exports.treemapSquarify = squarify;
+exports.tsv = tsv;
+exports.tsvFormat = tsvFormat;
+exports.tsvFormatBody = tsvFormatBody;
+exports.tsvFormatRow = tsvFormatRow;
+exports.tsvFormatRows = tsvFormatRows;
+exports.tsvFormatValue = tsvFormatValue;
+exports.tsvParse = tsvParse;
+exports.tsvParseRows = tsvParseRows;
+exports.union = union;
+exports.unixDay = unixDay;
+exports.unixDays = unixDays;
+exports.utcDay = utcDay;
+exports.utcDays = utcDays;
+exports.utcFriday = utcFriday;
+exports.utcFridays = utcFridays;
+exports.utcHour = utcHour;
+exports.utcHours = utcHours;
+exports.utcMillisecond = millisecond;
+exports.utcMilliseconds = milliseconds;
+exports.utcMinute = utcMinute;
+exports.utcMinutes = utcMinutes;
+exports.utcMonday = utcMonday;
+exports.utcMondays = utcMondays;
+exports.utcMonth = utcMonth;
+exports.utcMonths = utcMonths;
+exports.utcSaturday = utcSaturday;
+exports.utcSaturdays = utcSaturdays;
+exports.utcSecond = second;
+exports.utcSeconds = seconds;
+exports.utcSunday = utcSunday;
+exports.utcSundays = utcSundays;
+exports.utcThursday = utcThursday;
+exports.utcThursdays = utcThursdays;
+exports.utcTickInterval = utcTickInterval;
+exports.utcTicks = utcTicks;
+exports.utcTuesday = utcTuesday;
+exports.utcTuesdays = utcTuesdays;
+exports.utcWednesday = utcWednesday;
+exports.utcWednesdays = utcWednesdays;
+exports.utcWeek = utcSunday;
+exports.utcWeeks = utcSundays;
+exports.utcYear = utcYear;
+exports.utcYears = utcYears;
+exports.variance = variance;
+exports.version = version;
+exports.window = defaultView;
+exports.xml = xml;
+exports.zip = zip;
+exports.zoom = zoom;
+exports.zoomIdentity = identity;
+exports.zoomTransform = transform;
+
+}));
Index: node_modules/d3/dist/d3.min.js
===================================================================
--- node_modules/d3/dist/d3.min.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3/dist/d3.min.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,2 @@
+// https://d3js.org v7.9.0 Copyright 2010-2023 Mike Bostock
+!function(t,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n((t="undefined"!=typeof globalThis?globalThis:t||self).d3=t.d3||{})}(this,(function(t){"use strict";function n(t,n){return null==t||null==n?NaN:tn?1:t>=n?0:NaN}function e(t,n){return null==t||null==n?NaN:nt?1:n>=t?0:NaN}function r(t){let r,o,a;function u(t,n,e=0,i=t.length){if(e>>1;o(t[r],n)<0?e=r+1:i=r}while(en(t(e),r),a=(n,e)=>t(n)-e):(r=t===n||t===e?t:i,o=t,a=t),{left:u,center:function(t,n,e=0,r=t.length){const i=u(t,n,e,r-1);return i>e&&a(t[i-1],n)>-a(t[i],n)?i-1:i},right:function(t,n,e=0,i=t.length){if(e>>1;o(t[r],n)<=0?e=r+1:i=r}while(e{n(t,e,(r<<=2)+0,(i<<=2)+0,o<<=2),n(t,e,r+1,i+1,o),n(t,e,r+2,i+2,o),n(t,e,r+3,i+3,o)}}));function d(t){return function(n,e,r=e){if(!((e=+e)>=0))throw new RangeError("invalid rx");if(!((r=+r)>=0))throw new RangeError("invalid ry");let{data:i,width:o,height:a}=n;if(!((o=Math.floor(o))>=0))throw new 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+ }
+}
Index: node_modules/d3/src/index.js
===================================================================
--- node_modules/d3/src/index.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3/src/index.js (revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,30 @@
+export * from "d3-array";
+export * from "d3-axis";
+export * from "d3-brush";
+export * from "d3-chord";
+export * from "d3-color";
+export * from "d3-contour";
+export * from "d3-delaunay";
+export * from "d3-dispatch";
+export * from "d3-drag";
+export * from "d3-dsv";
+export * from "d3-ease";
+export * from "d3-fetch";
+export * from "d3-force";
+export * from "d3-format";
+export * from "d3-geo";
+export * from "d3-hierarchy";
+export * from "d3-interpolate";
+export * from "d3-path";
+export * from "d3-polygon";
+export * from "d3-quadtree";
+export * from "d3-random";
+export * from "d3-scale";
+export * from "d3-scale-chromatic";
+export * from "d3-selection";
+export * from "d3-shape";
+export * from "d3-time";
+export * from "d3-time-format";
+export * from "d3-timer";
+export * from "d3-transition";
+export * from "d3-zoom";