Abstract: A technique for simulating behaviors in a reconfigurable infrastructure represented in three dimensions and including interactive objects. Characteristics of an interactive object are described in an object profile, users in the infrastructure simulated by intelligent agents, an agent described in an agent profile including information indicating a main objective of said agent, executing a trajectory calculation process associated with a given agent including at least three steps: (1) profiles of the interactive objects are analyzed; (2) a trajectory is calculated or recalculated with the help of a path-search algorithm; (3) a check is performed to verify whether the trajectory is valid; if the trajectory is valid, the trajectory is taken into account for the movements of the intelligent agent; if the trajectory is not valid, at least one constraint included in an interactive object profile invalidating the trajectory is identified and the process is executed again from the first step.