Lance R. Marrou (marrou++at++vsl.ist.ucf.edu)
Thu, 27 Oct 1994 08:53:21 -0400 (EDT)
>
> Sounds like the scene is being culled out before the cull
> traversal reaches node with the cull mask set to accept.
> Since our cull mask semantics don't support something that
> says "accept this, but continue testing below", you'll
> either need to set the bounding sphere of the pfScene to
> be very large or use a pre-cull callback to force it to
> be accepted.
First, thanks for your quick response. :)
Do I need to set the bounding sphere of the scene or just the
groups underneath which will perform my own drawing? In other
words, will the bounding sphere of the scene be automatically
recomputed (with respect to your response, is that the scene
pre-cull callback or the group pre-cull callback)?
One more question, does it require significant amounts of processing
time to compute bounding spheres? I am curious if it would be
more beneficial to not even have a bounding sphere for the scene
node itself, since it could contain quite a few independent models,
and a distance operation for each every time they change might become
hazardous in a large simulation.
_______________________________________________________
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