Class BackIn

fr/lavache/anime/Easing.java:393–406

Back easing in - backtracking slightly, then reversing direction and moving to target.

     * Back easing in - backtracking slightly, then reversing direction and moving to target.
     */
    class BackIn extends Back {
        public BackIn() {
            super();
        }

        public BackIn(float overshoot) {
            super(overshoot);
        }

        public float ease(float t, float b, float c, float d) {
            float s = getOvershoot();
            return c * (t /= d) * t * ((s + 1) * t - s) + b;
        }
    }

    /**
     * Back easing out - moving towards target, overshooting it slightly, then reversing and coming back to target.