mirror of
https://github.com/photonstorm/phaser
synced 2024-12-25 04:23:30 +00:00
37 lines
632 B
TypeScript
37 lines
632 B
TypeScript
/// <reference path="../../_definitions.ts" />
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/**
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* Phaser - Easing - Back
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*
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* For use with Phaser.Tween
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*/
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module Phaser.Easing {
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export class Back {
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public static In(k) {
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var s = 1.70158;
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return k * k * ((s + 1) * k - s);
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}
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public static Out(k) {
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var s = 1.70158;
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return --k * k * ((s + 1) * k + s) + 1;
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}
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public static InOut(k) {
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var s = 1.70158 * 1.525;
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if ((k *= 2) < 1) return 0.5 * (k * k * ((s + 1) * k - s));
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return 0.5 * ((k -= 2) * k * ((s + 1) * k + s) + 2);
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}
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}
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}
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