phaser/Phaser/tweens/easing/Exponential.js

var Phaser;
(function (Phaser) {
    /// <reference path="../../_definitions.ts" />
    /**
    * Phaser - Easing - Exponential
    *
    * For use with Phaser.Tween
    */
    (function (Easing) {
        var Exponential = (function () {
            function Exponential() {
            }
            Exponential.In = function (k) {
                return k === 0 ? 0 : Math.pow(1024, k - 1);
            };

            Exponential.Out = function (k) {
                return k === 1 ? 1 : 1 - Math.pow(2, -10 * k);
            };

            Exponential.InOut = function (k) {
                if (k === 0)
                    return 0;
                if (k === 1)
                    return 1;
                if ((k *= 2) < 1)
                    return 0.5 * Math.pow(1024, k - 1);
                return 0.5 * (-Math.pow(2, -10 * (k - 1)) + 2);
            };
            return Exponential;
        })();
        Easing.Exponential = Exponential;
    })(Phaser.Easing || (Phaser.Easing = {}));
    var Easing = Phaser.Easing;
})(Phaser || (Phaser = {}));