Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!decwrl!shlump.nac.dec.com!hiatus.dec.com!hanoi.enet.dec.com!jnelson
From: jnelson@tle.enet.dec.com (Jeff E. Nelson)
Newsgroups: comp.sys.mac.programmer
Subject: Moire screen saver algorithm wanted
Message-ID: <1729@hiatus.dec.com>
Date: 30 Nov 89 23:37:02 GMT
Sender: news@hiatus.dec.com
Reply-To: jnelson@tle.enet.dec.com (Jeff E. Nelson)
Followup-To: comp.sys.mac.programmer
Organization: Digital Equipment Corporation, Technical Languages and Environments
Lines: 25

I am looking for the algorithm that is used in the Moire screen
saver to plot objects on the screen.  I don't need the calls to
draw the objects, but the code that figures out:

o  where to place the next object to be drawn, and
o  how to adjust the dimensions of the object (i.e., adjust the
   endpoints of a line segment, adjust the foci of an ellipse,
   etc.).

That is, I'm interested in the algorithim that generates the
Moire pattern.  The Moire documentation claims that the algorithm
is adopted from an unknown person who originally received it off of
a Sun source distribution of some kind or another.

Algorithms and pointers to other Moire-like pattern generating
algorithms are also appreciated.  Please post, so that others may
benefit, although I will summarize any mail I receive.

Thanks for your help.

-Jeff E. Nelson
-Digital Equipment Corporation
-Internet:  jnelson@tle.enet.dec.com
-  -or-     jnelson%tle.dec@decwrl.dec.com
-Affiliation given for identification purposes only