[JAVA3D] why not rotate about the (0,0,0)

[SUBSCRIBE JAVA3D-INTEREST peter]

hi all:
 i am a beginner and create 3 planes..but that 3 planes not rotat about the point 
(0,0,0) . I want to ask all of U how to set that?
and what is the use of normal in here ? Thanks all

   public BranchGroup createSceneGraph(SimpleUniverse su) {
    BranchGroup objRoot = new BranchGroup();
        TransformGroup vpTrans = null;
        BoundingSphere mouseBounds = null;
        vpTrans = su.getViewingPlatform().getViewPlatformTransform();
       QuadArray myQuads=new 
QuadArray(12,GeometryArray.COORDINATES|GeometryArray.NORMALS);

        Point3f[] myCoords={    new Point3f(0.0f,0.0f,0.0f),
      new Point3f(0.2f,0.0f,0.0f),
   new Point3f(0.2f,0.2f,0.0f),
   new Point3f(0.0f,0.2f,0.0f),

   new Point3f(0.0f,0.2f,0.0f),
   new Point3f(0.2f,0.2f,0.0f),
   new Point3f(0.0f,0.2f,0.2f),
      new Point3f(0.2f,0.2f,0.2f),

   new Point3f(0.0f,0.0f,0.2f),
   new Point3f(0.2f,0.2f,0.2f),
   new Point3f(0.0f,0.2f,0.2f),
      new Point3f(0.2f,0.2f,0.2f),

     };


myQuads.setCoordinates(0,myCoords);
Vector3f [] myNormals={new Vector3f(0.0f,0.0f,0.0f)};

ColoringAttributes myCA=new ColoringAttributes();
myCA.setColor(0.0f,1.0f,1.0f);
Appearance myAppear=new Appearance();
myAppear.setColoringAttributes(myCA);
Shape3D myshape2=new Shape3D(myQuads,myAppear);
objRoot.addChild(myshape2);
  mouseBounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 1000.0);

    MouseRotate myMouseRotate = new MouseRotate();
        myMouseRotate.setTransformGroup(vpTrans);
        myMouseRotate.setSchedulingBounds(mouseBounds);
        objRoot.addChild(myMouseRotate);

        objRoot.compile();
        return objRoot;
    }

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