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Last change
on this file since e4c61dd was e4c61dd, checked in by istevanoska <ilinastevanoska@…>, 6 months ago |
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Prototype 1.1
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Property mode
set to
100644
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File size:
445 bytes
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| 1 | import {atan, cos, sin} from "../math.js";
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| 2 | import {azimuthalInvert} from "./azimuthal.js";
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| 3 | import projection from "./index.js";
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| 4 |
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| 5 | export function stereographicRaw(x, y) {
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| 6 | var cy = cos(y), k = 1 + cos(x) * cy;
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| 7 | return [cy * sin(x) / k, sin(y) / k];
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| 8 | }
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| 9 |
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| 10 | stereographicRaw.invert = azimuthalInvert(function(z) {
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| 11 | return 2 * atan(z);
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| 12 | });
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| 13 |
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| 14 | export default function() {
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| 15 | return projection(stereographicRaw)
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| 16 | .scale(250)
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| 17 | .clipAngle(142);
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| 18 | }
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