[JAVA3D]

[matthias sweertvaegher]

Hello

I have a problem concerning the orbitbehavior class. When I move the mouse for some 
time (rotate and zoom) , suddenly no more movement is possible, so the app
"freezes". I added the boundingleaf of the behavior to the platformgeometry, so the 
behavior should be always on.
I haven't been able to create a lockup without zooming out first. The scene consists 
of only some cubes and triangles (less than 100 triangles in total)
I can't understand why such a basic app like mine can have problems. Please have a 
look at the very simple source code.

I also had the following problem : I didn't see anything on my screen until I pressed 
a mousebutton on the canvas (ie until the behavior got triggered). When I inserted
an extra transformgroup (in the code vpTG2) instead of using directly the one obtained 
from getViewPlatformTransform(), the problem was solved. Is this normal?

any help appreciated,

mattie

    public void init()
    {
        setLayout(new BorderLayout());
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas = new Canvas3D(config);
        add("Center", canvas);

        ViewingPlatform viewingPlatform = new ViewingPlatform();
        iVpBoundingLeaf = new BoundingLeaf(new BoundingSphere(new 
Point3d(0.0,0.0,0.0),100.0));
        PlatformGeometry pg = new PlatformGeometry();
        pg.addChild(iVpBoundingLeaf);
        viewingPlatform.setPlatformGeometry(pg);
        OrbitBehavior orbitBehavior = new 
OrbitBehavior(canvas,OrbitBehavior.REVERSE_ALL);
        orbitBehavior.setSchedulingBoundingLeaf(iVpBoundingLeaf);
        orbitBehavior.setZoomFactor(50.0);
        viewingPlatform.setViewPlatformBehavior(orbitBehavior);
        TransformGroup vpTG = viewingPlatform.getViewPlatformTransform();
        TransformGroup vpTG2 = new TransformGroup();
        vpTG.addChild(vpTG2);
        Transform3D vptrans = new Transform3D();
        vptrans.setTranslation(new Vector3d(0.0,0.0,20.0));
        Transform3D vprot0 = new Transform3D();
        Transform3D vprot1 = new Transform3D();
        vprot0.rotX(-0.75);
        vprot1.rotY(0.75);
        vprot0.mul(vprot1);
        vptrans.mul(vprot0);
        vpTG2.setTransform(vptrans);

        Viewer viewer = new Viewer(canvas);
        viewer.getView().setBackClipDistance(100.0);
        iSimpleUniverse = new SimpleUniverse(viewingPlatform,viewer);
        BranchGroup scene = createSceneGraph();
        iSimpleUniverse.addBranchGraph(scene);
    }

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