Script language for avatar animation in 3D virtual environments

This paper continues previous work by the authors on the animation of anthropomorphic avatars in virtual reality environments. An avatar animation control system was built in three hierarchical levels: joint control, basic behaviors and script language. This paper focuses on the grammar and parser for the script language, which was designed to be easy to extend and modify. Also, in order to verify how flexible the hierarchical approach is, the two lower control levels were implemented in two different ways, without affecting the script language level.