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From: patrick@longs.LANCE.ColoState.EDU (patrick fitzhorn)
Newsgroups: comp.graphics
Subject: Re: Plex language in Solid/Geometrical modeling
Message-ID: <13412@ccncsu.ColoState.EDU>
Date: 6 Mar 91 21:13:30 GMT
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Look at the following reference, which is the only PLEX-grammar based
modeler I have seen in the literature:

W. Lin and K. Fu, "A Syntactic Approach to 3-D Object Representation",
IEEE Transactions on Pattern Analysis and Machine Intelligence, 1984
PAMI-6(3), pp. 351-365

There are a number of other formal languages that have been used for
shape representation, notably the shape grammars of Stiny (UCLA),
the algebraic and node label control graph grammars that I have 
used for shape representation and enumeration, the structure
grammars of Woodbury (CMU), and various attributed grammars.

Patrick Fitzhorn            !  
Mechanical Engineering      ! Then remembering he was an automaton,
Colorado State University   ! he decided to  spend the night at the
Fort Collins, CO  80523     ! Hotel du Determinisme.
(303) 491-5505              !                           (P. Morand)