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Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
23 lines
416 B
JavaScript
23 lines
416 B
JavaScript
module.exports = rotate
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/**
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* Rotates a vec2 by an angle
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*
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* @param {vec2} out the receiving vector
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* @param {vec2} a the vector to rotate
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* @param {Number} angle the angle of rotation (in radians)
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* @returns {vec2} out
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*/
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function rotate(out, a, angle) {
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var c = Math.cos(angle),
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s = Math.sin(angle)
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var x = a[0],
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y = a[1]
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out[0] = x * c - y * s
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out[1] = x * s + y * c
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return out
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}
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