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optimised Vertices.rotate

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liabru 2021-04-26 23:43:21 +01:00
parent 792ae2ead4
commit 6883d0d98a
1 changed files with 14 additions and 8 deletions
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22
src/geometry/Vertices.js
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@ -196,15 +196,21 @@ var Common = require('../core/Common');
return;
var cos = Math.cos(angle),
sin = Math.sin(angle);
sin = Math.sin(angle),
pointX = point.x,
pointY = point.y,
verticesLength = vertices.length,
vertex,
dx,
dy,
i;
for (var i = 0; i < vertices.length; i++) {
var vertice = vertices[i],
dx = vertice.x - point.x,
dy = vertice.y - point.y;
vertice.x = point.x + (dx * cos - dy * sin);
vertice.y = point.y + (dx * sin + dy * cos);
for (i = 0; i < verticesLength; i++) {
vertex = vertices[i];
dx = vertex.x - pointX;
dy = vertex.y - pointY;
vertex.x = pointX + (dx * cos - dy * sin);
vertex.y = pointY + (dx * sin + dy * cos);
}
return vertices;