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https://github.com/photonstorm/phaser
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46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2020 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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/**
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* Round a value to the given precision.
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*
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* For example:
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*
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* ```javascript
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* RoundTo(123.456, 0) = 123
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* RoundTo(123.456, 1) = 120
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* RoundTo(123.456, 2) = 100
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* ```
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*
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* To round the decimal, i.e. to round to precision, pass in a negative `place`:
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*
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* ```javascript
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* RoundTo(123.456789, 0) = 123
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* RoundTo(123.456789, -1) = 123.5
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* RoundTo(123.456789, -2) = 123.46
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* RoundTo(123.456789, -3) = 123.457
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* ```
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*
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* @function Phaser.Math.RoundTo
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* @since 3.0.0
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*
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* @param {number} value - The value to round.
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* @param {integer} [place=0] - The place to round to. Positive to round the units, negative to round the decimal.
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* @param {integer} [base=10] - The base to round in. Default is 10 for decimal.
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*
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* @return {number} The rounded value.
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*/
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var RoundTo = function (value, place, base)
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{
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if (place === undefined) { place = 0; }
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if (base === undefined) { base = 10; }
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var p = Math.pow(base, -place);
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return Math.round(value * p) / p;
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};
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module.exports = RoundTo;
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