Our research focuses on animating autonomous virtual humans which are able
to take decisions by themselves. We especially address in this paper the te
chnical problem of integrating altogether the physical simulation of agents
(represented as virtual humans in a 3D environment) and their behaviours a
nd motivations, driven by a Beliefs, Desires and Intentions architecture. W
e also explain how goals drive plans, and how an agent can coherently handl
e concurrent tasks.