mirror of
https://github.com/photonstorm/phaser
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31 lines
820 B
JavaScript
31 lines
820 B
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2018 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* Calculates a Catmull-Rom value.
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*
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* @function Phaser.Math.CatmullRom
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* @since 3.0.0
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*
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* @param {number} t - [description]
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* @param {number} p0 - [description]
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* @param {number} p1 - [description]
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* @param {number} p2 - [description]
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* @param {number} p3 - [description]
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*
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* @return {number} The Catmull-Rom value.
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*/
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var CatmullRom = function (t, p0, p1, p2, p3)
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{
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var v0 = (p2 - p0) * 0.5;
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var v1 = (p3 - p1) * 0.5;
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var t2 = t * t;
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var t3 = t * t2;
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return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;
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};
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module.exports = CatmullRom;
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