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- 'use strict';
- // `Math.scale` method implementation
- // https://rwaldron.github.io/proposal-math-extensions/
- module.exports = Math.scale || function scale(x, inLow, inHigh, outLow, outHigh) {
- var nx = +x;
- var nInLow = +inLow;
- var nInHigh = +inHigh;
- var nOutLow = +outLow;
- var nOutHigh = +outHigh;
- // eslint-disable-next-line no-self-compare -- NaN check
- if (nx !== nx || nInLow !== nInLow || nInHigh !== nInHigh || nOutLow !== nOutLow || nOutHigh !== nOutHigh) return NaN;
- if (nx === Infinity || nx === -Infinity) return nx;
- return (nx - nInLow) * (nOutHigh - nOutLow) / (nInHigh - nInLow) + nOutLow;
- };
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