Hi Ruopeng,
this was discussed on this list about two weeks ago. I promised to
summarize my experiences, so here is what you probably shoul do.
First of all, you should use Java 3D 1.2.1b1. Unfortunately this means
you are restricted to Windows and Solaris platforms for now. Then you
should use the removeAllLocales() method of VirtualUniverse and create
a new Universe. Here is, what I do now.
simpleUniverse.getViewer().getView().removeCanvas3D(canvas3D);
// or: canvas3D.getView().removeCanvas3D(canvas3D);
simpleU.removeAllLocales(); // This should do a proper cleanup.
System.gc(); // Do the best to reclaim the memory.
simpleU = new SimpleUniverse(canvas3D); // Create a new SimpleUniverse.
simpleU.addBranchGraph(createSceneGraph()); // Attach the new scene.
/* creating a new universe reusing the old view branch
(does not work, at least with 1.2FCS,
throws an IllegalSharingException)
Viewer viewer = simpleUniverse.getViewer();
ViewingPlatform viewingPlatform = simpleUniverse.getViewingPlatform();
simpleUniverse.removeAllLocales();
viewingPlatform.detach();
simpleUniverse = new SimpleUniverse(viewingPlatform, viewer);
simpleUniverse.addBranchGraph(createSceneGraph());
*/
This works fairly well for the whole scene, but I am not sure what
happens to BranchGroups that are attached and removed from the scene
graph between a change of the whole content branch, as well scenes,
that you put in their own JFrame (see a previous mail, that was sent
to this list today).
Hope it helps,
Ingo
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