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Last change
on this file since a762898 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:
1.1 KB
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| 1 | export default function(a, b, x0, y0, x1, y1) {
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| 2 | var ax = a[0],
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| 3 | ay = a[1],
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| 4 | bx = b[0],
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| 5 | by = b[1],
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| 6 | t0 = 0,
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| 7 | t1 = 1,
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| 8 | dx = bx - ax,
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| 9 | dy = by - ay,
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| 10 | r;
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| 11 |
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| 12 | r = x0 - ax;
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| 13 | if (!dx && r > 0) return;
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| 14 | r /= dx;
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| 15 | if (dx < 0) {
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| 16 | if (r < t0) return;
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| 17 | if (r < t1) t1 = r;
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| 18 | } else if (dx > 0) {
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| 19 | if (r > t1) return;
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| 20 | if (r > t0) t0 = r;
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| 21 | }
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| 22 |
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| 23 | r = x1 - ax;
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| 24 | if (!dx && r < 0) return;
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| 25 | r /= dx;
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| 26 | if (dx < 0) {
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| 27 | if (r > t1) return;
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| 28 | if (r > t0) t0 = r;
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| 29 | } else if (dx > 0) {
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| 30 | if (r < t0) return;
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| 31 | if (r < t1) t1 = r;
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| 32 | }
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| 33 |
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| 34 | r = y0 - ay;
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| 35 | if (!dy && r > 0) return;
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| 36 | r /= dy;
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| 37 | if (dy < 0) {
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| 38 | if (r < t0) return;
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| 39 | if (r < t1) t1 = r;
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| 40 | } else if (dy > 0) {
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| 41 | if (r > t1) return;
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| 42 | if (r > t0) t0 = r;
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| 43 | }
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| 44 |
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| 45 | r = y1 - ay;
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| 46 | if (!dy && r < 0) return;
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| 47 | r /= dy;
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| 48 | if (dy < 0) {
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| 49 | if (r > t1) return;
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| 50 | if (r > t0) t0 = r;
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| 51 | } else if (dy > 0) {
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| 52 | if (r < t0) return;
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| 53 | if (r < t1) t1 = r;
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| 54 | }
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| 55 |
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| 56 | if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
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| 57 | if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
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| 58 | return true;
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| 59 | }
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