Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!rpi!wrf
From: wrf@mab.ecse.rpi.edu (Wm Randolph Franklin)
Newsgroups: comp.graphics
Subject: Re: Superquadrics
Message-ID: <3AR4+|@rpi.edu>
Date: 16 Jan 90 22:35:29 GMT
References: <438@fsu.scri.fsu.edu>
Organization: Rensselaer Polytechnic Institute, Troy NY
Lines: 32

In article <438@fsu.scri.fsu.edu> prem@geomag.gly.fsu.edu (Prem Subrahmanyam) writes:
>
>     I have been doing a lot of work with DBW_Render lately (honors thesis), 
>     and have acquired DBW 2.0 from the present keeper and author (Bill
>     Baldridge).  One of the new shapes that it supports is called a 
>     superquadric.  Now, I've attempted to look up info in IEEE CG&A about
>     them and found out that the first issue ever to come out had an article
>     about these, however, our library does not have this issue.  So, can   
>     anyone point out another source for info about these (the full equation
>     used for them, and how to do a ray-superquadric intersection (complete
>     with normal calculation for a given point))?  Thanks in advance......
>     ---Prem Subrahmanyam


1. You have a bad library since this is a standard journal.  They should
get the back copies that are missing.

2.  You might  contact  the author,  Al Barr,  then  at RPI  but  now at
Caltech,   for the  paper.  An  old    address  is barr@cit-vax.ARPA  or
@csvax.caltech.edu.

3. There was a second paper a little later  on superquadrics in IEEE CGA
by Barr and me.  I'll send you a copy if you give me your address.

4. Al has probably had other papers on them; he researches and publishes
a lot.  There might have been a Siggraph tutorial. 

-- 
						   Wm. Randolph Franklin
Internet: wrf@ecse.rpi.edu (or @cs.rpi.edu)    Bitnet: Wrfrankl@Rpitsmts
Telephone: (518) 276-6077;  Telex: 6716050 RPI TROU; Fax: (518) 276-6261
Paper: ECSE Dept., 6026 JEC, Rensselaer Polytechnic Inst, Troy NY, 12180