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From: bruceh@sgi.com (Bruce R. Holloway)
Newsgroups: comp.graphics,comp.sys.sgi
Subject: Re: ALGORITHM References Wanted: tri mesh clipping
Message-ID: <1990Oct15.191537.15343@odin.corp.sgi.com>
Date: 15 Oct 90 19:15:37 GMT
References: <JIM.90Oct14172452@baroque.Stanford.EDU>
Sender: news@odin.corp.sgi.com (Net News)
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Organization: Silicon Graphics, Inc., Mountain View, CA
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In article <JIM.90Oct14172452@baroque.Stanford.EDU> jim@baroque.Stanford.EDU (James Helman) writes:
>
>I'm looking for algorithms for clipping triangular meshes "on the fly"
>against several "arbitrary" clipping planes.
>
>Some graphics hardware (e.g. SGI's VGX) handles multiple clipping
>planes.  (If we had one, I wouldn't be asking these questions!)  Does
>anyone know how SGI does it?

The VGX clipper knows nothing of meshes, only triangles.
It inputs a triangle and outputs a whole number of triangles.
Clipping a mesh could result in multiple disjoint meshes.

As for clipping against arbitrary planes, this is done at the same time
and in the same way as against the six canonical clipping planes.

Regards, bruceh