1Musse S R, Kallmann M, Thalmann D. Level of autonomy for virtual human agents [A]. In: ECAL'99, Lausanne, Switzerland, 1999. 345～349
2Tecchia F, Loscos C, Chrysanthou Y. Visualizing crowds in real-time [J]. Computer Graphics Forum, 2002, 21(4): 753～765
3Bandi S, Thalmann D. The use of space discretization for autonomous virtual humans [A]. In: Proceedings of the 2nd International Conference on Autonomous Agents (AGENTS-98), Minneapolis, 1998. 336～337
4Aubel A, Boulic R, Thalmann D. Animated impostors for real-time display of numerous virtual humans [A]. In: Proceedings the 1st International Conference on Virtual Worlds (VW-98), Berlin, 1998. 14～28
5Tecchia F, Loscos C, Chrysanthou Y. Image based crowd rendering [J].IEEE Computer Graphics and Applications, 2002, 22(2): 36～43
6Aubel A, Boulic R, Thalmann D. Real-time display of virtual humans: Level of details and impostors [J]. IEEE Transactions on Circuits and Systems for Video Technology(Special Issue on 3D Video Technology), 2000, 10(2): 207～217
7Sullivan O, Cassell C, Vilhjálmsson J, et al. Crowd and group simulation with levels of detail for geometry, motion and conversational behaviour [A]. In: Proceedings of Eurographics, Ireland, 2002. 15～20
8Reynolds C W. Flocks, herds, and schools: A distributed behavioral model [J]. Computer Graphics, 1987, 21(4): 25～34
9Mataric M J. Learning to behave socially [A]. In: Animals to Animats: International Conference on Simulation of Adaptive Behavior, Brighton, 1994. 453～462
