Relative animations are animations that are rotation deltas from some base reference pose.
They are calculated by multiplying each frame of each joint the inverse of that joints in the base reference pose.
It is intended for use with additive blending.
Added the following fields to AnimClip node.
* isRelative (boolean)
* baseURL (string)
* baseFrame (int)
* Added seatedToIdle transition, to make transition quicker to better match the capsule physics.
* Made switching into and out of instantly set animVar for the animation graph, previously it was delayed by 100 ms.
* Created "isNotSeated" anim var for exiting the seated state.
* MyAvatar::beginSit & MyAvatar::endSit no longer calls goToPosition, instead MyAvatar::slamPosition is called.
* MyAvatar::slamPosition will cause the AvatarTransit class to NOT play the teleport anticipation/reaction animation.
Note: This does not prevent other clients from interpolating the position when entering the seat, but it prevents the teleport reaction animation from playing.
* Disable leg IK in HMD mode while seated.
Also, split getReactions() API into two calls
* getTriggerReactions() - lists all reactions that can be triggered with MyAvatar.triggerReaction().
* getBeginReactions() - lists all reactions that can be used with MyAvatar.beginReaction() and MyAvatar.endReaction().
This PR disables handTouch.js.
handTouch.js allows the fingers to animate on the surface of an object.
However, it can sometimes detect collisions with walls or tables when the avatar is standing next to them.
We will more properly fix handTouch.js in a future PR, but for now we will disable the functionality.
Also, a small bug fix was made to the Rig to prevent the idleOverlayAlpha from exceeding the 0.0 to 1.0 range.
This can cause the fingers to bend incorrectly for a moment.
Also, three new items were added to the Developer > Show Animation Stats panel.
* Joint Override Count: displays the current count of joints that are overriden by MyAvatar.setJointRotation() JS API calls.
* Flow: displays if flow is active of disabled.
* Network Graph: displays if the network anim graph, used for teleportation, is enabled or disabled.
https://highfidelity.atlassian.net/browse/BUGZ-154
