Xref: utzoo comp.graphics:3661 sci.math:4822
Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ames!ucsd!sdcc6!calmasd!pjm
From: pjm@calmasd.GE.COM (Pierre Malraison)
Newsgroups: comp.graphics,sci.math
Subject: a torus is almost a quadric
Message-ID: <149@calmasd.GE.COM>
Date: 17 Nov 88 17:26:26 GMT
Reply-To: pjm@calmasd.UUCP (Pierre Malraison)
Organization: GE Calma, San Diego, CA
Lines: 21

Levin's work on quadrics provides nice ways of getting
exact solutions for q-q intersection curves in terms
of square roots of lowish degree polynomials.

The torus, alas, is not a quadric.... but it is pretty simple
algebraically. It seems similar methods ought to work to represent t-q
and torus-torus intersections.

Any obscure references or suggestions welcomed. Public domain
ideas only please. E-mail to me appreciated.
------------------------.signature--------------------------------
These opinions are solely mine and in no way reflect those of my employer.  
Pierre Malraison @ GE/Calma R&D, Geometric Modeling Group, San Diego
...{ucbvax|decvax}!sdcsvax!calmasd!pjm          pjm@calmasd.GE.COM


-- 
------------------------.signature--------------------------------
These opinions are solely mine and in no way reflect those of my employer.  
Pierre Malraison @ GE/Calma R&D, Geometric Modeling Group, San Diego
...{ucbvax|decvax}!sdcsvax!calmasd!pjm          pjm@calmasd.GE.COM