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From: krogh@talon.ncsa.uiuc.edu (Mike Krogh)
Newsgroups: comp.graphics,comp.graphics.visualization
Subject: Re: how to view f(x,y,z) = constant surfaces ?
Keywords: isosurfaces
Message-ID: <1991Mar15.152835.24927@ux1.cso.uiuc.edu>
Date: 15 Mar 91 15:28:35 GMT
References: <1991Mar14.234739.15281@athena.mit.edu>
Sender: krogh@talon (Mike Krogh)
Distribution: na
Organization: Nat. Cnt. for Supercomputing Appl.
Lines: 33


This type of surface is known as an isosurface.  You can get some public
domain software from NCSA's anonymous ftp server (ftp.ncsa.uiuc.edu or
128.174.20.50 [this may change to 141.142.20.50 any day now]).  After
logging into the server, go into the directory 'isovis' and get the
stuff in there, which includes binaries, source, and documentation.
This code will work on most machines, but has a option for displaying
the output on an SGI workstation.

You can also find a lot of other visualization tools on our server.


Mike Krogh
NCSA
krogh@ncsa.uiuc.edu


In article <1991Mar14.234739.15281@athena.mit.edu>, chasman@athena.mit.edu (David Chasman) writes:
> Umm, I've never read or posted to either of these groups.  What I am looking
> for is some code to take the function zz = f(x,y,z) and render the 3-D surface
> which corresponds to this.  
> 
> Ideally, I'd like C-code for a silicon graphics machine.
> 
> My current technique is to evaluate f(x,y,z) for all discretized
> (x,y,z) inside of a cube - and to light up a point 
> if :
> 	 | f(x,y,z) - constant | < Epsilon
> 
> if you have any ideas - please help.
> 
> --David Chasman
> chasman@athena.mit.edu