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Last change
on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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| 1 | // `Math.scale` method implementation
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| 2 | // https://rwaldron.github.io/proposal-math-extensions/
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| 3 | module.exports = Math.scale || function scale(x, inLow, inHigh, outLow, outHigh) {
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| 4 | if (
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| 5 | arguments.length === 0
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| 6 | /* eslint-disable no-self-compare -- NaN check */
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| 7 | || x != x
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| 8 | || inLow != inLow
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| 9 | || inHigh != inHigh
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| 10 | || outLow != outLow
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| 11 | || outHigh != outHigh
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| 12 | /* eslint-enable no-self-compare -- NaN check */
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| 13 | ) return NaN;
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| 14 | if (x === Infinity || x === -Infinity) return x;
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| 15 | return (x - inLow) * (outHigh - outLow) / (inHigh - inLow) + outLow;
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| 16 | };
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