@Override
    public void physicsTick(PhysicsSpace space, float timeStep) {
        assert space == getPhysicsSpace();

        torsoLink.postTick();
        for (BoneLink boneLink : boneLinkList) {
            boneLink.postTick();
        }

        isReady = true;
    }
Callback from Bullet, invoked just after the physics has been stepped.
Used to re-activate any deactivated rigid bodies.

@param space the space that was just stepped (not null)
@param timeStep the time per physics step (in seconds, &ge;0)
jme3-jbullet/src/main/java/com/jme3/bullet/animation/DacLinks.java