Mezati Messaoud¹, Foudil Cherif², Cedric Sanza³ and Veronique Gaildrat³, ¹University of Ouargla, Algeria, ²University of Biskra, Algeria and ³IRIT, France

Many virtual reality applications, such as training, urban design or gaming are based on a rich semantic description of the environment. This paper describes a new representation of semantic virtual worlds. Our model, called SVHsIEVs1should provide a consistent representation of the following aspects: the simulated environment, its structure, and the knowledge items using ontology, interactions and tasks that virtual humans can perform in the environment. Our first main contribution is to show the influence of semantic virtual objects on the environment. Our second main contribution is to use these semantic informations to manage he tasks of each virtual object. We propose to define each task by a set of attributes and relationships, which determines the links between attributes in tasks, and links between other tasks. The architecture has been successfully tested in 3D dynamic environments for navigation in virtual urban environments.

Virtual environments, semantic modeling, ontology, Virtual Human