Luis Villablanca wrote:
> I wish I could do that. If I use nulls instead
> of a branchgroup I get an exception:
>
> java.lang.InternalError: Group: only BranchGroup nodes may be set

Oh... errr. that's odd. We use that struture all through the Xj3D code.
Hmm... I do know that there was an issue that crept in with the latest
1.3 beta that stopped us doing that for something. I came across it just
over a month ago and got a bug ID number back from the Sun guys. I'll
see if I can track it down.

FWIW, one of my standard tactics for reducing the number of cap bits
that need to be set is to construct the BG with a child set to null,
and then only set ALLOW_CHILDREN_WRITE. (I know exactly the total number
of children that could ever be set). Later on, when I get a valid child,
I replace the null with the actual BG. This stopped working with the
beta version, and hence the bug report.

--
Justin Couch                         http://www.vlc.com.au/~justin/
Java Architect & Bit Twiddler              http://www.yumetech.com/
Author, Java 3D FAQ Maintainer                  http://www.j3d.org/
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Neither man nor woman is the measure of all things. Every organism
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                                               - Greg Bear, Slant
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