phaser/Phaser/system/easing/Quartic.ts

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2013-04-18 13:16:18 +00:00
/// <reference path="../../Game.ts" />
/**
* Phaser - Easing
*
* @desc Based heavily on tween.js by sole (https://github.com/sole/tween.js)
*
* @version 1.0 - 11th January 2013
*
* @author Richard Davey, TypeScript conversion and Phaser integration. See Phaser.TweenManager for the full tween.js author list
*/
module Phaser.Easing {
export class Quartic {
public static In(k) {
return k * k * k * k;
}
public static Out(k) {
return 1 - (--k * k * k * k);
}
public static InOut(k) {
if ((k *= 2) < 1) return 0.5 * k * k * k * k;
return -0.5 * ((k -= 2) * k * k * k - 2);
}
}
}