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From: jch@Stardent.COM (Jan Hardenbergh)
Newsgroups: comp.graphics
Subject: Re: Solid Modeler summary ...
Message-ID: <1991May16.155854.1436@Stardent.COM>
Date: 16 May 91 15:58:54 GMT
References: <1991May9.201345.1801@wpi.WPI.EDU>
Organization: Stardent Computer, Concord MA
Lines: 30


[Good Summary of lots of solid modellers deleted]

Of course, the really big names are not mentioned, Computervision,
Intergraph, CADAM and CATIA.  They only account for over half of the
CAD market - based on 1989 market share data from Daratech.

CAD/CIM Alert did a survey of Solid Modelling based CAD/CAM systems
in a Febuary 28, 1989 issue.  They covered 18 companies/products, but
missed some such as BRL-CAD.

> IGES (Version 3.0 I think) is defining standards to transfer solid models -
> BRep and CSG.  [I feel IGES is getting too bulky these days.]
> 
> 
> PDES: 	As far as solid modeling format, one of the tasks of NIST in
>   working with DARPA is to get the research community to use PDES an
>   emerging standard for product model information including solids and
>   finite element analysis.  More information is available via
>   nptserver@cme.nist.gov put send index in the BODY (not subject line)
>   of the message, there is tons of stuff available.

If you think IGES is too bulky, I do not think you are going to like
PDES.  The IGES spec is somewhere between 2-3 inches. The PDES spec was
about 8 inches or more, last I saw it.


-- 
-Jan "YON" Hardenbergh       jch@stardent.com         (508)-371-9810x261
Stardent Computer, 6 N.E. Tech Center, 521 Virginia Rd,Concord, MA 01742