Expo.java

package com.external.easing;
 
public class Expo {
	
	public static float  easeIn(float t,float b , float c, float d) {
		return (t==0) ? b : c * (float)Math.pow(2, 10 * (t/d - 1)) + b;
	}
	
	public static float  easeOut(float t,float b , float c, float d) {
		return (t==d) ? b+c : c * (-(float)Math.pow(2, -10 * t/d) + 1) + b;	
	}
	
	public static float  easeInOut(float t,float b , float c, float d) {
		if (t==0) return b;
		if (t==d) return b+c;
		if ((t/=d/2) < 1) return c/2 * (float)Math.pow(2, 10 * (t - 1)) + b;
		return c/2 * (-(float)Math.pow(2, -10 * --t) + 2) + b;
	}

}