protected void getOffsetTransform(Matrix4f outTransform) {
        jointModelTransform.getOffsetTransform(outTransform, inverseModelBindMatrix);
    }
Stores the skinning transform in the specified Matrix4f.
The skinning transform applies the animation of the bone to a vertex.
<p>
This assumes that the world transforms for the entire bone hierarchy
have already been computed, otherwise this method will return undefined
results.

@param outTransform storage for the result (modified)
jme3-core/src/main/java/com/jme3/anim/Joint.java