Double interpolation?

Question

So, I've got a combination of Keyframe, PropertyValuesHolder and ValueAnimator. Both Keyframe and ValueAnimator have interpolators.

Code looks like:

Keyframe frame =
    Keyframe.ofFloat(1f, someValue);
frame.setInterpolator(interpolator1);

PropertyValuesHolder holder =
    PropertyValuesHolder.ofKeyframe("myProperty", frame);

ValueAnimator animator =
    ValueAnimator.ofPropertyValuesHolder(holder);
animator.setInterpolator(interpolator2);

animator.start();

The question is am I getting double interpolation or just a single one? What is the formula?

Answer 1

I've looked through ValueAnimator and KeyframeSet sources. It seems that firstly fraction is interpolated in ValueAnimator and then also in KeyframeSet