public final void resetAndUpdate() {
        for (int i = rootBones.length - 1; i >= 0; i--) {
            Bone rootBone = rootBones[i];
            rootBone.reset();
            rootBone.update();
        }
    }
Reset the skeleton to bind pose and updates the bones
jme3-core/src/main/java/com/jme3/animation/Skeleton.java