Continuum Crowds

This is a paper by Treuille, A. Cooper, S., and Popović, Z, presented in Siggraph 2006.It’s a real time crowd model based on continuum dynamics. The motion of crowds is controlled by a dynamic potential field, which allows it to avoid moving obstacles without the need of explicit collision avoidance. Their paper and video can be downloaded here.
This paper presents a lot of potential in creating a real time crowd simulation with large crowds. It would be interesting to see other implementations of this technique.