+ private boolean isAnimationIncreasing() {
+ return mAnim > 0 && mAnimDelta > 0 || mAnim < 0 && mAnimDelta < 0;
+ }
+
+ protected final void updateAnimation(float delta) {
+ if (mVelocity.x != 0f || Math.abs(mAnim) > mAnimDelta * delta) {
+ mAnim += mAnimDelta * delta;
+ } else {
+ mAnim = 0;
+ }
+
+ if (mAnim > 60f) {
+ mAnim = 60f;
+ mAnimDelta = -ANIMATION_SPEED;
+ } else if (mAnim < -60f) {
+ mAnim = -60f;
+ mAnimDelta = ANIMATION_SPEED;
+ }
+
+ if (mVelocity.x == 0f && isAnimationIncreasing()) {
+ mAnimDelta = -mAnimDelta;
+ }
+ }
+