ReverseDelayInterplorator

ReverseDelayInterplorator.java

/**
* The graph:
* 
*         ----
*        /
*       /
*      /
* ----
* 
* @author sromku
*/
public class ReverseDelayInterpolator implements TimeInterpolator {

		private final float mDelayFraction;
		private final float mAngle;

		public ReverseDelayInterpolator(float delayFraction) {
			mDelayFraction = delayFraction;
			mAngle = 1 / (1 - mDelayFraction);
		}

		@Override
		public float getInterpolation(float input) {

			// check if we on the left side of the graph
			if (input <= mDelayFraction / 2) {
				return 0;
			}

			// check if we on the right side of the graph
			if (input >= 1 - mDelayFraction / 2) {
				return 1;
			}

			/*
			 * We make indentation of the graph to left (zero axis) and make the
			 * angle based on the fraction
			 */
			return (input - mDelayFraction / 2) * mAngle;
		}

	}