private void createSkinningMatrices() {
        skinningMatrixes = new Matrix4f[jointList.length];
        for (int i = 0; i < skinningMatrixes.length; i++) {
            skinningMatrixes[i] = new Matrix4f();
        }
    }
Update all joints in this Armature.
jme3-core/src/main/java/com/jme3/anim/Armature.java