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https://github.com/photonstorm/phaser
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17 lines
318 B
JavaScript
17 lines
318 B
JavaScript
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// p = Point or any object with public x/y properties
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var RotateAround = function (p, cx, cy, angle)
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{
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var c = Math.cos(angle);
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var s = Math.sin(angle);
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var x = p.x - cx;
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var y = p.y - cy;
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p.x = x * c - y * s + cx;
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p.y = x * s + y * c + cy;
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return p;
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};
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module.exports = RotateAround;
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