1package aurelienribon.tweenengine.equations;
2
3import aurelienribon.tweenengine.TweenEquation;
4
5/**
6 * Easing equation based on Robert Penner's work:
7 * http://robertpenner.com/easing/
8 * @author Aurelien Ribon | http://www.aurelienribon.com/
9 */
10public abstract class Bounce extends TweenEquation {
11	public static final Bounce IN = new Bounce() {
12		@Override
13		public final float compute(float t) {
14			return 1 - OUT.compute(1-t);
15		}
16
17		@Override
18		public String toString() {
19			return "Bounce.IN";
20		}
21	};
22
23	public static final Bounce OUT = new Bounce() {
24		@Override
25		public final float compute(float t) {
26			if (t < (1/2.75)) {
27				return 7.5625f*t*t;
28			} else if (t < (2/2.75)) {
29				return 7.5625f*(t-=(1.5f/2.75f))*t + .75f;
30			} else if (t < (2.5/2.75)) {
31				return 7.5625f*(t-=(2.25f/2.75f))*t + .9375f;
32			} else {
33				return 7.5625f*(t-=(2.625f/2.75f))*t + .984375f;
34			}
35		}
36
37		@Override
38		public String toString() {
39			return "Bounce.OUT";
40		}
41	};
42
43	public static final Bounce INOUT = new Bounce() {
44		@Override
45		public final float compute(float t) {
46			if (t < 0.5f) return IN.compute(t*2) * .5f;
47			else return OUT.compute(t*2-1) * .5f + 0.5f;
48		}
49
50		@Override
51		public String toString() {
52			return "Bounce.INOUT";
53		}
54	};
55}