--- "Brobbey,Isaac (neuron)"
<[EMAIL PROTECTED]> wrote:
> Dear All:
>
> i have a branch Group with three children. All the
> children are also branch
> Groups which also contains 3D graphs like;
>
> BranchGroup createSceneGraph(Vector hix)
> {
> BranchGroup objRoot = new BranchGroup();
>
> objRoot.setCapability(BranchGroup.ALLOW_DETACH);
>
>
objRoot.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
>
>
objRoot.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
>
>
objRoot.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
>
> for(int k =0;k<3;k++)
> {
> System.out.println("k="+k );
>
> objRoot.addChild(makeOneGraph(k,hix));
> }
> return objRoot;
> }
>
> i need some help with how to read and display the
> second and third children.
>
> this is the method i wrote:
>
> private void showChildren(boolean boon)
> {
> if(boon != false && isRunning() )
> {
>
> //java.util.Enumeration enumChild =
> scene.getAllChildren();
> //if (enumChild.hasMoreElements())
> if (scene!=null)
> {
> //System.out.println("enum
> size="+enumKids);
> BranchGroup brg = (BranchGroup)
> scene.getChild(1);
> if (brg instanceof BranchGroup )
> {
> //brg.detach();
> GraphicsConfigTemplate3D
> template = new
> GraphicsConfigTemplate3D();
> GraphicsEnvironment env =
> GraphicsEnvironment.getLocalGraphicsEnvironment();
> GraphicsDevice device =
> env.getDefaultScreenDevice();
> GraphicsConfiguration config =
> device.getBestConfiguration(template);
>
> JPopupMenu.setDefaultLightWeightPopupEnabled(false);
> Canvas3D canvax = new
> Canvas3D(config);
> canvax.addMouseListener(this);
> u2 = new SimpleUniverse(canvax);
>
> pickCanvas = new PickCanvas(canvax,
> brg);
>
>
pickCanvas.setMode(PickTool.GEOMETRY_INTERSECT_INFO);
> pickCanvas.setTolerance(0.0f);
> canvas.setCursor(new
> Cursor(Cursor.HAND_CURSOR));
>
> // cannot share cannot share canvas
> with multiple views.
>
> // get the view
> //view = u.getViewer().getView();
> //view.addCanvas3D(canvas);
>
> // This will move the ViewPlatform
> back a bit so the
> // objects in the scene can be
> viewed.
> ViewingPlatform viewingPlatform =
> u.getViewingPlatform();
>
> viewingPlatform.setNominalViewingTransform();
>
> // add an orbit behavior to move the viewing
> platform
> OrbitBehavior orbit = new
> OrbitBehavior(canvas,OrbitBehavior.STOP_ZOOM);
> orbit.setSchedulingBounds(bounds);
>
> viewingPlatform.setViewPlatformBehavior(orbit);
>
> u2.addBranchGraph(brg);
>
> JFrame f = new JFrame("test");
> f.getContentPane().add(canvax,"Center");
> f.setBounds(100,100,400,400);
> f.setVisible(true);
>
> f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
> }
> }
>
>
> }
> }
>
> and this is the ERROR:
>
>
> all children=3
> javax.media.j3d.MultipleParentException:
> Locale.addBranchGraph: Branch Group
> already has a parent
> at
>
javax.media.j3d.Locale.addBranchGraph(Locale.java:158)
> at
>
com.sun.j3d.utils.universe.SimpleUniverse.addBranchGraph(SimpleUniverse.java
> :356)
> at
>
GraphicDisplay.showChildren(GraphicDisplay.java:1144)
>
> I am really out of ideas, any help will be reaaly
> Appreciated.
> i am 98& done.
>
> Isaac
My guess would be this code here:
BranchGroup brg = (BranchGroup) scene.getChild(1);
u2.addBranchGraph(brg);
is giving you the error. You would have to use
cloneTree(true) to add it without causing the error,
which you can't do on a live scene. So the only way I
can think of (on a live scene) would be to detach the
BranchGroup, and add a clone of it. You would have to
keep track of it's parent so you could re-add it,
otherwise you would just be moving it.
So something like.
brg.detach();
u2.addBranchGroup(brg.cloneTree(true));
scene.addChild(brg);
Here I'm assuming scene is a BranchGroup and you have
the capabilities set...
=====
See you later,
Brandon
-------------------------------
"Don't take it too seriously it's just life we'll win in the end." Superchic[k]
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