Re: Q. Viewing Frustum

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Andy Shein (ashein++at++orac.boston.sgi.com)
Thu, 5 Feb 1998 12:39:24 -0800

Hi Wilfried
   Take a look at the man page for pfChannel. There are some
functions like
  int pfChannel::contains(const pfVec3 &pt, pfChannel* chan);

     int pfChannel::contains(const pfSphere* sph);

     int pfChannel::contains(const pfCylinder* cyl);

     int pfChannel::contains(const pfBox* box);

That can be called in a cull callback to see if the item is in
view.
                        Andy

On Feb 5, 2:08pm, Wilfried Zeise wrote:
> Subject: Q. Viewing Frustum
>
> [ plain text
> Encoded with "quoted-printable" ] :
Hi:
>
> Can I use cull callbacks to find out, which objects of my database lie in
> the viewing frustum? How can I use pfGet() to inquire database information?
>
> Regards
>
> Wilfried Zeise
> Bergische Universität GH Wuppertal
> Fuhlrottstr. 10
> 42097 Wuppertal
> Tel.: 0202-439-2961
> Fax: 0202-439-2959
> email: zeise++at++uni-wuppertal.de
>
>
> List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
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>-- End of excerpt from Wilfried Zeise

-- 
Andrew Shein   SE Stout               email: ashein++at++boston.sgi.com
Silicon Graphics Inc.                 phone: (508) 562 - 4800
1 Cabot Road                            fax: (508) 562 - 4755
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