@Override
    public void cloneFields(Cloner cloner, Object original) {
        this.target = cloner.clone(target);
        computePosition();
        prevPos = new Vector3f(target.getWorldTranslation());
        cam.setLocation(pos);
    }
clone this camera for a spatial

@param spatial ignored
@return never
jme3-core/src/main/java/com/jme3/input/ChaseCamera.java