Re: pfBillboard calculations

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From: Angus Dorbie (dorbie++at++sgi.com)
Date: 07/24/2000 13:09:07

If you want the source code go to the web page

http://www.dorbie.com/

and follow the link to the dev toolbox in the first paragraph.

Sorry for all the typos in the text of my tutorial, I'd update it if I
had easy ftp to my tutorial pages on the sgi site.

CHeers,Angus.

Brian Furtaw wrote:
>
> Christopher,
>
> Angus Dorbie did an example using billboarded trees doing just what you
> want to do. He has a pretty good discription of what you need to do at
> http://www.sgi.com/software/performer/brew/billboard.html. If you
> subscribe to the developers toolbox the code may be in there.
>
> Brian
>
> christopher.g.dorosky++at++lmco.com wrote:
> >
> > hi,
> >
> > I am attempting to use a large number of billboards in my scene. Each
> > billboard seems to get a post-cull (is this right?) callback that aligns it
> > to the eye point.
> >
> > Is it possible to quickly (from a real time point of view) disable this
> > callback, or enable it selectively?
> >
> > If I have 5000 billboards, I might want to set a limit of only 1000 to be
> > updated per frame.
> >
> > Does anybody have any suggestions?
> >
> > Chris
> >
> > Christopher Dorosky
> > Lead Electronic Systems Engineer - Real Time Simulation
> > Lockheed Martin Missiles and Fire Control - Dallas
> > christopher.g.dorosky++at++lmco.com
> > 972-603-2349
> > -----------------------------------------------------------------------
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> > Submissions: info-performer++at++sgi.com
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>
> --
> ----oOOo---- ----oOOo---- ----oOOo---- ----oOOo----
>
> Brian Furtaw (brian++at++sgi.com)
> Graphics Guru Office:(301)572-3293 Fax: (603)250-0370
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-- 
For Performer+OpenGL tutorials http://www.dorbie.com/

"In the middle of difficulty lies opportunity." 
 --Albert Einstein

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