Re: modelling CAs in swarm?

[Pietro Terna]

Hi Phil, 

I have tested your helpful examples, many thanks.

Only conwaylife2d has been creating some problem in my Linux box. I my
directory (SWARMHOME)/include/graph/ I just had a ConwayLife2d.h file, which
resulted imported in your application via #import <graph.h>
so generating errors such as 'duplicate interface declarations' and,
finally, no linking.

My solution hacked solution has been that of modiying all instances of
ConwayLife2d in ConwayLifeBis2d in your package and so ... all is running.

Yours, Pietro


At 19.14 11/04/97 +0100, you wrote:
>I'm a delurking swarm user who rates somewhere just over 3 on Glen's
>user scale (3 - those who have successfully installed Swarm and played
>with the provided demos, but haven't made their own models, 4 -  those
>who are actively using Swarm).
>
>I'm interested in using swarm to explore cellular automata, specifically
>to model physical phenomena (i.e. digital physics or Fredkin's universe
>as a CA). In order to get started I set up a sim of Conway's Life. This
>is literally a two minute job to wrap a model swarm around the pre-
>supplied life class.
>
>Since I'm likely to want to utilise relatively large lattice spaces
>(ultimately in 3d), and the life class is implemented with a bog
>standard 2d array, I set about cobbling together a sparse matrix version
>of life and I've now succeeded in getting this up and running. The
>initial world size is specified and seeded with the desired probability,
>the initial world area is constantly displayed on a raster, but the
>lattice iteslf extends to 32k x 32k (it should be possible to increase
>this even further). In actual fact the app will also run more than just
>the life rule, allowing any 2d, binary, totalistic, Moore neighborhood
>CA to be simulated by specifying the appropriate birth/survival rule
>before running. 
>
>For anyone who's interested, both apps are available at:
>http://www.pknight.demon.co.uk/
>I should emphasise though that they are very hacked together and not
>intended to be the best or most efficient means of construction. At this
>stage I'm just trying to explore methods of modelling CAs on large
>lattices rather than providing serious models. Any constructive
>criticism is more than welcome.
>
>The real purpose of this post is to ask firstly if anyone else here is
>using swarm for CAs, especially on large lattices and if so, the
>approaches being used in the models.
>
>Secondly, and perhaps more importantly, one area that I'm really going
>to want to work on is visualisation tools (esp. 3d). For example, the
>sims above only display the initial lattice size, but the "active"
>lattice in the sparse version quickly becomes much larger, so there is a
>requirement to be able to zoom in/out of different areas of the lattice.
>I haven't yet thought too much about 3d visualisation tools as yet, but
>hope this post might stimulate some discussion :-)
>
>-- 
>Phil Knight
>
>
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                  ==================================
   Swarm-Modelling is for discussion of Simulation and Modelling techniques
   esp. using Swarm.  For list administration needs (esp. [un]subscribing),
   please send a message to <address@hidden> with "help" in the
   body of the message.
                  ==================================