ExpoEaseInOutInterpolator.java

package com.tencent.tws.assistant.interpolator;

public class ExpoEaseInOutInterpolator extends BaseInterpolator {

    @Override
    public Float calculate(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;
    }
}