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27 lines
405 B
JavaScript
27 lines
405 B
JavaScript
export default function pertrub([x, y, z]) {
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let s = x + y + z;
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x = pertrubFloat(x + 3 + s);
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y = pertrubFloat(y + 5 + s);
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z = pertrubFloat(z + 7 + s);
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let r = Math.sqrt(x*x + y*y + z*z);
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return [
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x/r,
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y/r,
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z/r
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];
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}
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function pertrubFloat(x) {
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return xorshift32(Math.round(x * 1e8)) ;
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}
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function xorshift32(x) {
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x ^= x << 13;
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x ^= x >> 17;
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x ^= x << 5;
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return x;
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}
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