Thank you, Mark!

One more question, How can I use the org.web3d.util
  package? Where can I download the UtilCanvas3D.java?

thanks again!



At 05:29 PM 7/5/2002 -0700, you wrote:
> > Date:         Fri, 5 Jul 2002 17:22:21 -0400
> > From: Lan Wu-Cavener <[EMAIL PROTECTED]>
> >
> > If I have the viewingPlatform, how can I get the six planes of the view
> > frustum? could anyone please give a quick hint?
>
>Get the Canvas3D and call the getInverseVworldProjection() method
>available in Java 3D 1.3.  Use the matrices obtained to back project the
>[-1.0 .. +1.0] bounds of the viewing frustum from clipping coordinates
>into world coordinates.
>
>-- Mark Hood
>
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Lan Wu-Cavener
Dept. of Landscape Architecture

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