Implementation of graphical library for synthetic characters in virtual environments

In this paper discussed the design and implementation of a graphical library for synthetic character in virtual learning environment. The library provides basic API for high-level users that do not care about graphic skills, such as artificial group, educational group programmers. Simply writing several rows of code, the library creates the 3D environment with synthetic characters under user requirements. A virtual mind designed from AI group or imported from present AI system is supported. It controls synthetic character expressing specified behavior and personal personality. Open Scene Graph (OSG) is chosen to manage scene organization and geometry level rendering mechanism based on OpenGL. Behavior is implemented using animation engine which take advantage of Cal3D, an animation library supporting motion blending and transition.