thecloud@dhw68k.cts.com (Ken McLeod) (09/29/88)
This is in reply to Raymond Chen, as my mail to him was bouncing. It
will hopefully be interesting to anyone else who has experimented
with the Hodgepodge cellular automaton algorithm.
Thanks for sending the code... I'll look it over and see if there's
something I missed, but from your description of your results, it sounds
like the error is Dewdney's, not ours.
The best results I could obtain with my implementation were with Moore
neighborhoods, NOT von Neumann, and the "test parameters" as described
in the article DEFINITELY do not produce anything capable of spreading
infection. I was able to get some interesting results using von Neumann
neighborhoods when n=255, g=1, k1=1, k2=1 on a 100x100 cell grid, but
after a while (much less time with a 20x20 array!) the whole thing
degenerated into a giant checkerboard, with alternate cells ill and
healthy (or near health).
I've sent a letter to Dewdney... we'll see what happens.
-ken
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