There were three things that were causing issues with eye look at vectors while wearing an HMD.
1) The matrix returned by AvatarUpdate->getHeadPose() was in the wrong space, it should be in avatar space.
it was actually returning a matrix in sensor/room space.
2) The lookAtPosition was incorrect while wearing an HMD and with no avatars to look at.
3) The eye rotation limits in Rig::updateEyeJoint were relative to the model's zero orientation, NOT relative to the head.
this was causing the eyes to hit limits when the avatar head turned.
* When computing tipPosition, for the next iteration of the CCD,
use the leverArm before it's projected onto the lowerSpine twist axis.
* fix for acos() that was going outside of valid domain. (-1.0, 1.0)
Now there are two sets of of jump takeoff and in-air animations.
* Run - Used when the character jumps or falls with a small forward velocity.
* Standing - Used when the character jumps or falls in-place or backward.
CharacterController
* increased takeoff duration to 250 ms
* increased takeoff to fly duration to 1100 ms
* added standing jump and in-air animations
* added 250 milisecond delay between ground and hover, to prevent going into hover when walking over cracks.
* take-off to in-air transitions now use the new snapshotPrev interp type for a smoother tweening.
interpType defines how the interpolation between two states is performed.
* SnapshotBoth: Stores two snapshots, the previous animation before interpolation begins and the target state at the
interTarget frame. Then during the interpolation period the two snapshots are interpolated to produce smooth motion between them.
* SnapshotPrev: Stores a snapshot of the previous animation before interpolation begins. However the target state is
evaluated dynamically. During the interpolation period the previous snapshot is interpolated with the target pose
to produce smooth motion between them. This mode is useful for interping into a blended animation where the actual
blend factor is not known at the start of the interp or is might change dramatically during the interp.
