Path: utzoo!utgpu!watmath!watcgl!jdchrist
From: jdchrist@watcgl.waterloo.edu (Dan Christensen)
Newsgroups: comp.graphics
Subject: Re: Polygon Representation of a Sphere's Surface
Message-ID: <8836@watcgl.waterloo.edu>
Date: 26 Mar 89 18:55:47 GMT
References: <270@ai.etl.army.mil> <7409@thorin.cs.unc.edu>
Reply-To: jdchrist@watcgl.waterloo.edu (Dan Christensen)
Organization: U. of Waterloo, Ontario
Lines: 20

In article <7409@thorin.cs.unc.edu> leech@alanine.UUCP (Jonathan Leech) writes:
>    This request comes up (seemingly) once a month or so.  For a
>change, here's the code to do it instead of a description.  Note that
>the triangles generated are all equilateral, but not all the same
>size. This program generates tesselations with
>
>--
>    Jon Leech (leech@cs.unc.edu)    __@/
>    SUSHIDO: the Way of the Tuna

Are you sure that the triangles are all equilateral?  I wrote a program a
while ago that seems to do exactly what yours does and they some of the
triangles that were generated looked isoceles.  In fact, after several
iterations, the triangles became extremely thin and so the polygonization
was not very efficient.  Starting with a 20 sided regular figure (I forget
its name) helps.

----
Dan Christensen, Computer Graphics Lab,	         jdchrist@watcgl.uwaterloo.ca
University of Waterloo, Waterloo, Ont.	         jdchrist@watcgl.waterloo.edu