phaser/Phaser/system/easing/Quartic.ts
2013-04-18 16:49:08 +01:00

34 lines
488 B
TypeScript

/// <reference path="../../Game.ts" />
/**
* Phaser - Easing - Quartic
*
* For use with Phaser.Tween
*/
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);
}
}
}