Protocol description

{
    uint8 flags:
        bit 1: position
        bit 2: rotation
        bit 3: scale (Unused, but was implemented in puppetry)
        bit 4: IK
        bit 5: Partial
        bit 6-8: unused / future
    
    uint16 flags2:
        bit 1-11: boneID (Up to 2048 bones, more than anyone will need)
        bit 11-16: length
    
    for length:
        if position:
            int16 x
            int16 y
            int16 z
        
        if rotation:
            int16 x
            int16 y
            int16 z
        
        if scale:
            int16 x
            int16 y
            int16 z
}

Length is index 1. If IK, length is the chain length of the IK.

If not IK, length is the number of bones up the hiarchy we are animating. Example: If we specify mWristRight, and a length of 5, we animate this chain:

1. mWristRight
2. mElbowRight
3. mShoulderLeft
4. mCollarRight
5. mChest

If position, rotation, and scale are both zero, stop animating those bones.

BoneID is the ID of the occurance of the bone in the skeleton. This is received from the default skeleton, or from the bakes service.

Partial indicates that not all the bones have been sent yet, and that more bone updates are coming down the chain.