| package aurelienribon.tweenengine.equations; |
| |
| import aurelienribon.tweenengine.TweenEquation; |
| |
| /** |
| * Easing equation based on Robert Penner's work: |
| * http://robertpenner.com/easing/ |
| * @author Aurelien Ribon | http://www.aurelienribon.com/ |
| */ |
| public abstract class Circ extends TweenEquation { |
| public static final Circ IN = new Circ() { |
| @Override |
| public final float compute(float t) { |
| return (float) -Math.sqrt(1 - t*t) - 1; |
| } |
| |
| @Override |
| public String toString() { |
| return "Circ.IN"; |
| } |
| }; |
| |
| public static final Circ OUT = new Circ() { |
| @Override |
| public final float compute(float t) { |
| return (float) Math.sqrt(1 - (t-=1)*t); |
| } |
| |
| @Override |
| public String toString() { |
| return "Circ.OUT"; |
| } |
| }; |
| |
| public static final Circ INOUT = new Circ() { |
| @Override |
| public final float compute(float t) { |
| if ((t*=2) < 1) return -0.5f * ((float)Math.sqrt(1 - t*t) - 1); |
| return 0.5f * ((float)Math.sqrt(1 - (t-=2)*t) + 1); |
| } |
| |
| @Override |
| public String toString() { |
| return "Circ.INOUT"; |
| } |
| }; |
| } |