Re: glClipPlane in Performer.

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Mr. M.D.R. Prasad - VR Group (mdrp++at++ada.ernet.in)
Fri, 26 Sep 1997 19:55:09 -0500 (GMT)

I used 6 GL clipping planes in performer. I was able to move and rotate
them
in the scene. But the problem is when I move the scene in trackball mode
the clipping planes do not move with the scene. I want to move them
along with the scene in the xformer model. How do I do this?

Thanks...
prasad

On Tue, 23 Sep 1997, Angus Dorbie wrote:

> On Sep 23, 10:38am, Steve Baker wrote:
> > Subject: glClipPlane in Performer.
> >
> > A few questions:
> >
> > * Has anybody out there used the extra glClipPlane's within a Performer
> Application?
>
> I've used six simultaneously in a performer based GL application.
>
> >
> > * I don't see any Performer features to enable them - did I miss something?
> >
>
> Nope, use the GL.
>
> > * Does anyone have a feel for the performance impact on an Inf.Reality box?
> >
>
> Nope, I expect a modest geometry overhead.
>
> > * Is it one of those features that puts me off the optimised pathways through
> OpenGL
> > and thus *kills* performance - or is it just the overhead of the additional
> clipping?
>
> Just the clipping.
> Did you have any features in mind when you say this? I'm not aware of
> this kind of thing on iR.
>
> Cheers,Angus.
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