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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";
}
};
}
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