highfidelity/hifi — pull request #2559 by AndrewMeadows (2014-03-27 22:35:49+00:00)
Title: split lean input from lean perturbations

This makes the collision resolution effects on the head/torso play better with faceshift driven avatars. The driven part of the lean (faceshift) is independent of the perturbation part (collisions) and are independently attenuated over time. The final lean angles are the sum of the two, as used by the SkeletonModel to compute the final joint transforms.