When using skinning with rotations only, the translation is removed. However, the worm might move slightly, because the skeleton root in bind pose and skeleton root in current timestep have different positions. Difference of this positions might be needed to encode in the translation matrix of the skeleton root node.
When using skinning with rotations only, the translation is removed. However, the worm might move slightly, because the skeleton root in bind pose and skeleton root in current timestep have different positions. Difference of this positions might be needed to encode in the translation matrix of the skeleton root node.