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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:
365 bytes
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| 1 | export default function(polygon) {
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| 2 | var i = -1,
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| 3 | n = polygon.length,
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| 4 | b = polygon[n - 1],
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| 5 | xa,
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| 6 | ya,
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| 7 | xb = b[0],
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| 8 | yb = b[1],
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| 9 | perimeter = 0;
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| 10 |
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| 11 | while (++i < n) {
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| 12 | xa = xb;
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| 13 | ya = yb;
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| 14 | b = polygon[i];
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| 15 | xb = b[0];
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| 16 | yb = b[1];
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| 17 | xa -= xb;
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| 18 | ya -= yb;
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| 19 | perimeter += Math.hypot(xa, ya);
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| 20 | }
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| 21 |
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| 22 | return perimeter;
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| 23 | }
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