mirror of
https://github.com/photonstorm/phaser
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34 lines
532 B
TypeScript
34 lines
532 B
TypeScript
/// <reference path="../../_definitions.ts" />
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/**
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* Phaser - Easing - Circular
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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 Circular {
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public static In(k) {
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return 1 - Math.sqrt(1 - k * k);
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}
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public static Out(k) {
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return Math.sqrt(1 - (--k * k));
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}
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public static InOut(k) {
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if ((k *= 2) < 1) return -0.5 * (Math.sqrt(1 - k * k) - 1);
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return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);
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}
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}
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}
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