mirror of
https://github.com/photonstorm/phaser
synced 2024-11-24 05:33:35 +00:00
34 lines
524 B
TypeScript
34 lines
524 B
TypeScript
/// <reference path="../../Game.ts" />
|
|
|
|
/**
|
|
* Phaser - Easing - Circular
|
|
*
|
|
* For use with Phaser.Tween
|
|
*/
|
|
|
|
module Phaser.Easing {
|
|
|
|
export class Circular {
|
|
|
|
public static In(k) {
|
|
|
|
return 1 - Math.sqrt(1 - k * k);
|
|
|
|
}
|
|
|
|
public static Out(k) {
|
|
|
|
return Math.sqrt(1 - (--k * k));
|
|
|
|
}
|
|
|
|
public static InOut(k) {
|
|
|
|
if ((k *= 2) < 1) return -0.5 * (Math.sqrt(1 - k * k) - 1);
|
|
return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|