| 1 | export function centroid(polygon){
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| 2 | var _x = 0, _y = 0, _z = 0, _n = polygon.length;
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| 3 |
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| 4 | for (var i = _n - 1; i >= 0; i--) {
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| 5 | _x += polygon[i].rotated.x;
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| 6 | _y += polygon[i].rotated.y;
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| 7 | _z += polygon[i].rotated.z;
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| 8 | }
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| 9 |
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| 10 | return {
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| 11 | x: _x / _n,
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| 12 | y: _y / _n,
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| 13 | z: _z / _n,
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| 14 | };
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| 15 | }
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