The local X rotation corresponds to a global Y rotation, and by a different angle. To retarget the pose, we therefore reexpress the transformation in the global coordinate system, as shown below. This is not very useful if the target armature has a diffent rest pose. Since the parent’s local Y points along its axis and its local Z points up, the child bone is rotated around the local X axis. The picture above shows a transformation in the local coordinate system. If the rest poses of the source and target armatures differ, the source F-curves can not be used directly by the target armature. The motion of each bone is specified in local coordinates, relative to the parent and the bone’s own rest pose. However, it is not straightforward to assign the source action to the target rig, even if the bones have identical names. from a BVH file) to a given target armature (e.g. The goal of retargeting is to transfer a motion from a source armature (e.g. MakeWalk is a Blender add-on for retargeting mocap data (.bvh files) to a given armature.
The MakeWalk tool is now found as a tab on the T-side-panel in Blender.Reference to armatures in older version of MakeHuman.Most of the fundamental information is quite usable, nevertheless. There is a wealth of important information in this document, but some of the detail is badly out of date.
