+ center +"  Vertices: "+computeVertices()+"]";
+ center +"  xExtent: "+xExtent +"  yExtent: "+yExtent +"  zExtent: "+zExtent+"]";
    public String toString() {        return "com.jme.scene.BoundingBox [Center: "                + center +"  Vertices: "+computeVertices()+"]";    }