Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!m.cs.uiuc.edu!s.cs.uiuc.edu!mcooper
From: mcooper@s.cs.uiuc.edu
Newsgroups: comp.graphics
Subject: Re: 3-d -----> 2-d
Message-ID: <207400034@s.cs.uiuc.edu>
Date: 19 Oct 89 20:41:00 GMT
References: <2370@ge-dab.GE.COM>
Lines: 23
Nf-ID: #R:ge-dab.GE.COM:2370:s.cs.uiuc.edu:207400034:000:813
Nf-From: s.cs.uiuc.edu!mcooper    Oct 19 15:41:00 1989


/* ---------- "Re: 3-d -----> 2-d" ---------- */
In article <1133@utkcs2.cs.utk.edu> wozniak@utkux1.utk.edu (Bryon Lape) writes:
>
>	Does anyone know of an algorithm for translating 3-d to 2-d so
>that I can plot on my IBM-PC?  I wish to display all axises at a
>rotation
>suitable to view everything.
>
>-bryon-

I hope I'm not being simplistic here, but it seems the easiest way to convert 
any 3D object into 2D is (assuming the object is made of polygons) sort the
polygons by depth (z value) using a simple depth sort (or the painters' 
algorithm.  Effective, but S-L-O-W) and then plot each polygon according
to its x,y coords.  

Or are you asking something else?

					-Marc Cooper
"When the going gets weird,		 mcooper@cs.uiuc.edu
 the weird turn pro."
		-Hunter S. Thompson	 University of Illinios, C-U