13 lines
364 B
JavaScript
13 lines
364 B
JavaScript
function fastInverseSqrt(number) {
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const threehalfs = 1.5;
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const x2 = number * 0.5;
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let i = new Float32Array(1);
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i[0] = number;
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let y = new Int32Array(i.buffer);
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y = threehalfs - (x2 * y * y);
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y = Math.abs(y);
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y = (y / 1000000000000000000);
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y = y - ((Math.floor(y) / 10) / y);
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y = Math.round(y * 100) / 100;
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return y;
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}
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