Using NeXT 3D kit to dump tesselated surfaces

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#1406

From: Shane G. Artis
Date: Sun, 11 Oct 1992 22:12

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	Hi, I've found by using the 3D kit on RIB files that I can produce
good wireframe views of the 3D images by choosing a wireframe model.
My goal is to dump RIB primitives and composite solids into polygonal
patches which I can render with a ray-tracer (instead of prman which
doesn't support ray-tracing).  Is there any way to get at the (x,y,z)
coordinate data of the wireframe solids being drawn on the screen by
methods such as renderSelf:, or using the RenderMan interface commands
directly?  

	This would make the 3DKit a high-quality surface tesselator
for solids, patches, NURBS, and so on which is a useful ability.  Any
clues would be appreciated. My instinct is to use the
convertPoints:fromSpace methods and their ilk found in the N3DShape
and N3DCamera objects, but I don't see an immediate or even sneaky
low-level way to get at the points.

	Help much appreciated!

Regards,

Shane

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Message-ID: <1992Oct11.221240.23292@athena.mit.edu>

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Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!darwin.sura.net!spool.mu.edu!think.com!snorkelwacker.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!shanega
From: shanega@athena.mit.edu (Shane G. Artis)
Subject: Using NeXT 3D kit to dump tesselated surfaces
Message-ID: <1992Oct11.221240.23292@athena.mit.edu>
Keywords: RenderMan, rendering, tesselation, graphics
Sender: shanega@athena.mit.edu
Nntp-Posting-Host: e40-008-7.mit.edu
Organization: Massachusetts Institute of Technology
Date: Sun, 11 Oct 1992 22:12:40 GMT
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