Re: Performer questions
Robert Webb (webb++at++cgl.citri.edu.au)
Mon, 21 Feb 1994 10:29:50 +1100 (EDT)
> On Fri, 18 Feb 1994 18:48:21 +1100 (EDT)
> Robert Webb <webb++at++cgl.citri.edu.au> writes:
>
> >- In one of our applications at least, the culling does not work properly.
> > Objects suddenly vanish before they leave the viewing frustrum. Any ideas
> > why this could be? We are not changing any of the GeoSets or other data in
> > the hierarchy after it has been initially set up.
>
> I assume you are using Performer 1.0 because we had the same problem.
> Ours occurred when we scaled a pfDCS with pfDCSScale. This was useful
> for instancing our data set. A once-defined box from a procedure for
> creating pfGeoSets could be scaled to the particular task. Some of our
> boxes vanished before the edge of our frustum. We tested and found that
> the problem got worse with more scaling.
>
> On Fri, 16 Jul 93 18:41:18 -0700
> Jim Helman <jimh++at++surreal.asd.sgi.com> writes:
>
> > There is a culling bug for scaled DCSes
> > which was fixed in Release 1.1. 1.1 only
> > was released for IRIX 5.0.
Thanks for the advice, but we aren't using any pfDCS nodes at all! Only pfSCS
nodes. We are using Performer 1.0 though. Is there an easy way to show the
bounding boxes in performer? Or does anyone have code to do this? Maybe the
boxes somehow aren't being created correctly, but this seems unlikely.
--
Rob. (webb++at++godzilla.cgl.citri.edu.au)
This archive was generated by hypermail 2.0b2
on Mon Aug 10 1998 - 17:50:11 PDT