Subj : Re: PET Colonies, based upon Conway's Game of Life
To   : Shaun Bebbington
From : ArcadeAge
Date : Fri Apr 27 2018 13:09:56

On Thursday, April 26, 2018 at 9:16:16 AM UTC+2, Shaun Bebbington wrote:
> I made this for the unexpanded VIC-20:
> 
> 0 def fn l(i)=a%(y-i,x-i)+a%(y-i,x)+a%(y-i,x+i)+a%(y,x-i)+a%(y,x+i)+a%(y+i,x-i)+a%(y+i,x)+a%(y+o,x+o):poke36879,8:tr%=20:tc%=21:dim a%(tr%,tc%),b%(tr%,tc%):h=.22:o=1:sr%=3:er%=18:ec%=19:c=.:g%=.:c1=2:c2=3:gosub 1000
> 1 for y=.to tr%:for x=.to tc%:a%(y,x)=b%(y,x):if a%(y,x)=.then print" ";:goto 
3
> 2 print"*";
> 3 next x,y:print "generation:";g%;"{home}";:g%=g%+o:for y=o to tr%-o:for x=o 
to tc%-o:c=.:c=fn l(o):if a%(y,x)=o and c<>c1and c<>c2then b%(y,x)=.:goto 5
> 4 if a%(y,x)=.and c=c2then b%(y,x)=o
> 5 next x,y:if g%<32768 then goto 1
> 6 goto6:donkeysoft
> 1000 print"{clear}{green}pet colonies, based   upon space colony by  tim 
hartnell circa    1983 in turn based    upon conway's         game of 
life{home}";:for y=sr% to er%:for x=sr% to ec%:b%(y,x)=rnd(.)+h:next x,y:return
> 
> Programmed with CBM PRG Studio.
> 
> The Commodore C64/128 version is here -> 
https://github.com/sbebbers/PET-Colonies#pet-colonies-64-for-the-commodore-64128-and-compatibles
> 
> Obviously, with it being BASIC, it's quite slow. Although with an accelerator 
and BLITZ BASIC it's pretty quick.
> 
> Regards,
> 
> Shaun

Do you have any additional information on Space Colony?
I found a program by Tim Hartnell called Evolution, published in his "Symphony 
for a Melancholy Computer", and -- according to Hartnell -- plagiarized by 
someone called R W Moore in Vic Computing 04/1982.

I wrote a Game of Life BASIC program for the Commodore 64 a few years ago, but 
it was painfully slow. I developed some ideas for reducing the number of memory 
accesses and did plan to rewrite it in assembly language, but that never 
materialized. I assume 
that entire volumes on Game of Life implementations were published at the time 
when it was new.

Chris

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