> The canvas 3D is placed correctly in a frame now, but is misplaced in a child
> dialog.
> This can be tried with the simple following test where the canvas 3D doesn't
> appear at the good location:
>
> import java.awt.GraphicsEnvironment;
> import javax.media.j3d.*;
> import javax.swing.*;
> import com.sun.j3d.utils.universe.SimpleUniverse;
>
> public class Canvas3DPositionInDialogTest {
>   public static void main(String [] args) {
>     // Create a minimal canvas 3D
>     GraphicsConfigTemplate3D gc = new GraphicsConfigTemplate3D();
>     Canvas3D canvas = new Canvas3D(GraphicsEnvironment.getLocalGraphicsEnvironment().
>         getDefaultScreenDevice().getBestConfiguration(gc));
>     canvas.setSize(100, 100);
>     new SimpleUniverse(canvas);
>
>     // Display the canvas 3D in a dialog child of a frame
>     JFrame frame = new JFrame("Canvas3DPositionTest");
>     frame.setSize(400, 400);
>     frame.setVisible(true);
>     JOptionPane.showMessageDialog(frame, canvas);
>   }
> }
>
>
> I think that when you look for the location of the canvas 3D at screen, you
> should go up in the components hierarchy until you find a parent of Window
> class, and not until you get a null parent. Hope this will help...