That can be done by having some sort of bridging tool. At Apple I hear there used to be an in-house tool that takes AfterEffect raw output and convert it into

That can be done by having some sort of bridging tool. At Apple I hear there used to be an in-house tool that takes AfterEffect raw output and convert it into full transformation matrices (which covers rotation, translation and scale, which in turn covers everything within an animation) that can be directly used by CoreAnimation. I'm actually surprised AE still doesn't have a tool that can export full transformation matrices on a frame-by-frame basis.