ABSTRACT

It is natural for man to escape from everyday reality for different reasons (artistic, cultural or professional). Thanks to technological developments, man has been able to satisfy this need through various but set representations of the world that are mainly audio or visual. Set in the sense that the user can observe the representation only as a spectator, be it a painting, a photograph, or a film of real or computer-generated images. Virtual reality offers him an additional dimension by providing him a virtual environment in which he becomes the actor. The readers must not be mistaken; the novelty is not in the creation of virtual environments that are increasingly efficient in terms of their representation, but rather in the possibility of being able to “act virtually’’ in an artificial world (or “interact’’ in a more technical sense).