[JAVA3D] waitForOffScreenRendering goes CPU hog

[Bradley White]

I have the following Branch group for the View Platform side of the
scene graph:


VP ------------ Viewa ----------- Canvas3Da
|
|
Viewb ---------- Canvas3Db
|
|
Canvas3Dc (Off screen canvas)

The Canvas3Da node and its View node represents an alternative view
of the 3D world is created thus:

        // Create a second view on the second canvas, attach it to
        // the viewing platform
        View viewb = new View();
        viewb.setWindowResizePolicy( View.VIRTUAL_WORLD );
        View view0 = canvas3Db.getView();
        viewb.setPhysicalBody( view0.getPhysicalBody() );
        viewb.setPhysicalEnvironment( view0.getPhysicalEnvironment() );
        viewb.attachViewPlatform( canvas3Db.getViewPlatform() );
        viewb.addCanvas3D( canvas3Da );

The Canvas3Db  is the "main" view of the world and Canvas3Dc is an
off screen canvas to support screen capture.

The Canvas3Dc is attached to the Canvas3Db View with:

         canvas3Db.getView().addCanvas3D(canvas3Dc);

I am attempting to capture a snapshot of the canvas3Db using the  off screen
canvas, canvas3Dc, with :

         BufferedImage image = new
BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
         ImageComponent2D buffer = new
ImageComponent2D(ImageComponent.FORMAT_RGBA, image);
         buffer.setCapability(ImageComponent2D.ALLOW_IMAGE_READ);

         canvas3Dc.setOffScreenBuffer(buffer);
         canvas3Dc.renderOffScreenBuffer();

         canvas3Dc.waitForOffScreenRendering(); <-- At this point my
program goes CPU hog and never returns.

Can any one see any problems in what I'm trying to do?

Brad.

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