protected void kinematicUpdate(float tpf) {
        assert tpf >= 0f : tpf;
        assert rigidBody.isKinematic();
        /*
         * If blending, increase the kinematic weight.
         */
        if (blendInterval == 0f) {
            setKinematicWeight(1f); // done blending
        } else {
            setKinematicWeight(kinematicWeight + tpf / blendInterval);
        }
        /*
         * If we didn't need kpVelocity, we could defer this
         * calculation until the preTick().
         */
        Vector3f previousLocation = kpTransform.getTranslation(null);
        updateKPTransform();
        if (tpf > 0f) {
            kpTransform.getTranslation().subtract(previousLocation, kpVelocity);
            kpVelocity.divideLocal(tpf);
        }
    }
Update this link in blended Kinematic mode.

@param tpf the time interval between frames (in seconds, &ge;0)
jme3-jbullet/src/main/java/com/jme3/bullet/animation/PhysicsLink.java