Semi-automatic end-user tools for construction of virtual avatar behaviors

TitleSemi-automatic end-user tools for construction of virtual avatar behaviors
Publication TypeConference Paper
Year of Publication2011
AuthorsSrinivasan, M., and R. A. Metoyer
Tertiary AuthorsRoyan, J., M. Preda, T. Boubekeur, and N. F. Polys
Conference NameProceedings of the 16th International Conference on 3D Web Technology - Web3D '11
Date Published06/2011
PublisherACM Press
Conference LocationParis, France
ISBN Number9781450307741
Keywordsanimation, motion graphs, responsive characters, virtual avatars

We present tools and techniques for the design of an interactive motion data structure to drive virtual avatars. Our approach automatically analyzes a traditional labeled motion graph and constructs a condensed, coarser graph referred to as a Behavior Finite State Machine (BFSM). Each node of the BFSM represents a single behavior, and each weighted edge represents a valid transition and its likelihood. We present a semi-automated mechanism for user-editing of the graph. We also introduce an interface for user-in-the-loop design of transitions and blend spaces to generate controllable avatars from a BFSM. We present the results of our approach using two dynamic interactive examples, locomotion and martial arts, and discuss the strengths and weaknesses of our technique.