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From: thornton@ssc-vax.UUCP
Newsgroups: comp.graphics,comp.ai
Subject: Solid Modeling
Message-ID: <798@ssc-bee.ssc-vax.UUCP>
Date: Fri, 27-Mar-87 15:12:10 EST
Article-I.D.: ssc-bee.798
Posted: Fri Mar 27 15:12:10 1987
Date-Received: Sun, 29-Mar-87 07:33:00 EST
Organization: Boeing Aerospace
Lines: 34
Keywords: 3D Graphics, Robotics, Automation
Xref: utgpu comp.graphics:415 comp.ai:337



Unfortunately, there is no CAD/CAM, Robotics, or Automation newsgroups
so I decided to post here.

I am interested in hearing from people who know about solid modeling systems
and have experience using them. Specific questions I'm interested in are:

What is generally preferred, constructive solid geometry (CSG) representations
or boundary represesentations (B-rep)?

Of the available commercial systems, is CSG or B-rep more predominant?

I am specifically interested in generating procedures for a robotic vision
system to automatically inspect a part, given a solid model of the part.
In addition to the actual part model, it would be necessary to have 
information about specific features, relationships between features,
feature tolerances, and object surface reflectance. From what I understand,
commercial systems do not provide this information in the output file
representation of the part.

More than anything, I'm interested in stimulating some discussion about 
solid modeling and related computer graphics algorithms. If such a
discussion is considered inappropriate to this newsgroup, I might be interested
in forming another group or starting a mailing list, if anyone is
interested.

Ken

-- 
Ken Thornton          {decvax,ihnp4}!uw-beaver!ssc-vax!ssc-bee!thornton
Boeing Aerospace      PO Box 3999  MS 2E-73  Seattle, WA  98124-2499

       "A little learning is a dang'rous thing" - Alexander Pope