Algorithms for City Simulation? [closed]

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I want to create a city filled with virtual creatures.

Say like Sim City, where each creature walks around, doing it's own tasks.

I'd prefer the city to not 'explode' or do weird things -- like the population dies off, or the population leaves, or any other unexpected crap.

Is there a set of basic rules I can encode each agent with so that the city will be 'stable'? (Much like how for physics simulations, we have some basic rules that govern everything; is there a set of rules that governs how a simulation of a virtual city will be stable?)

I'm new to this area and have no idea what algorithms/books to look into. Insights deeply appreciated.

Thanks!

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I would start with the game of Life.

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Here is the original SimCity source code:

http://www.donhopkins.com/home/micropolis/micropolis-activity-source.tgz

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It may be hard to find any general resources on the subject, because it is quite specific area.

I have implemented some population dynamics and I know that it is not easy to get all the behavior correct to ensure that the population does not die off or overgrows. It is relatively easy if you implement a simple scenario like in predator-prey model, but tends to get tricky as the number of factors increases.

Some advice:

• Try to make behavior of agents parametrized

• Optimize the behavior parameters using some soft method, a neural network, a genetic algorithm or a simple hillclimbing algorithm, optimizing a single parameter of the simulation (like the time before the whole population dies off combined with average growth factor)

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Here is a pointer to some research on the topic, but be advised -- the population in this research study all died off.

http://www.nsf.gov/news/news_summ.jsp?cntn_id=104261