phaser/Phaser/system/easing/Quartic.js

var Phaser;
(function (Phaser) {
    /// <reference path="../../Game.ts" />
    /**
    * Phaser - Easing - Quartic
    *
    * For use with Phaser.Tween
    */
    (function (Easing) {
        var Quartic = (function () {
            function Quartic() { }
            Quartic.In = function In(k) {
                return k * k * k * k;
            };
            Quartic.Out = function Out(k) {
                return 1 - (--k * k * k * k);
            };
            Quartic.InOut = function InOut(k) {
                if((k *= 2) < 1) {
                    return 0.5 * k * k * k * k;
                }
                return -0.5 * ((k -= 2) * k * k * k - 2);
            };
            return Quartic;
        })();
        Easing.Quartic = Quartic;        
    })(Phaser.Easing || (Phaser.Easing = {}));
    var Easing = Phaser.Easing;
})(Phaser || (Phaser = {}));