The main fix for this was to set the JointState animation priority to 3.0
The secondary fix was only noticed when we changed the animation priority
Basically, the debugRendering was using the JointStates after they were
manipulated by SkeletonModel to 'relax' them toward thier default pose for
IK purposes.
Because the current IK system doesn't quite handle what we need
for the head and neck IK, we do it procedurally in the rig, and
manually set both neck and head IK targets.
Restore the hmd conditional on setting head position. This had been removed when failing to pin it cause lean.
I believe that lean was being caused by coordinate system issues that are now addressed by the above and Andrew's big cleanup.
Filtering these was necessary before when the underpose coordinate was wrong, but now that we have that working, there shouldn't be any need to filter.
AnimController: proper support for alpha
AnimController: bug fix for translation.
AnimOverlay: renamed local var when building hand boneSets from head to hand.
The hand state machine has the following features
* There's a idle to point animation, followed by a looping point hold state.
* There's a point to idle animation.
* The grab state is composed of a linear blend between an open and closed pose.
Additionally the C++ code will ramp on the left and right hand overlays,
This allows the fingers to be animated normally when the user is not actively
pointing or grabbing.
* Application: Forward trigger values to the MyAvatar's PalmData
* SkeletonModel: Pass PalmData to Rig via updateRigFromHandData() this is more explicit then
the Rig::inverseKinematics methods.
* AnimNodeLoader & AnimOverlay: add support for LeftHand and RightHand bone sets
* Rig::updateRigFromHandData() read the triggers and set stateMachine trigger vars
* avatar.json - udpated with new hand state machine with temporary animations
