Hello, David. I'm fairly new to this. At school, we are trying to achieve an urban system based on swarm behaviour. We made a model about it, but our professor is telling us we are being too metaphorical about it. It is asking us for an algorithm to determine the parameters of the model and the shape it takes with that algorithm. However, we are having a hard time understanding this. It's kind of confusing. If you could help us (me and my classmates) with it we would appreciate it so much.  Our model is basically like this one, it forms a strand in some parts of it, and then it dissipate sinto many individual strands like the way a swarm behaves, but we can't find that algorithm our professor is asking us about. Thank you. 

Clemente