phaser/src/math/FloorTo.js
2019-05-10 16:15:04 +01:00

31 lines
868 B
JavaScript

/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2019 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
/**
* Floors to some place comparative to a `base`, default is 10 for decimal place.
*
* The `place` is represented by the power applied to `base` to get that place.
*
* @function Phaser.Math.FloorTo
* @since 3.0.0
*
* @param {number} value - The value to round.
* @param {integer} [place=0] - The place to round to.
* @param {integer} [base=10] - The base to round in. Default is 10 for decimal.
*
* @return {number} The rounded value.
*/
var FloorTo = function (value, place, base)
{
if (place === undefined) { place = 0; }
if (base === undefined) { base = 10; }
var p = Math.pow(base, -place);
return Math.floor(value * p) / p;
};
module.exports = FloorTo;