Issue No. 01 - January/February (2008 vol. 14)
We present a psychology-inspired approach for generating a character' s anticipation of and response to an impending head or upper body impact. Protective anticipatory movement is built upon several actions that have been identified in the psychology literature as response mechanisms in monkeys and in humans. These actions are parameterized by a model of the approaching object (the threat) and are defined as procedural rules. We present a hybrid forward and inverse kinematic blending technique to guide the character to the pose that results from these rules while maintaining properties of a balanced posture as well as characteristics of the behavior just prior to the interaction. In our case, these characteristics are determined by a motion capture sequence. We combine our anticipation model with a physically-based dynamic response to produce animations where a character anticipates an impact before collision and reacts to the contact, physically, after the collision. We present a variety of examples including threats that vary in approach direction, size and speed.
Animation, Motion Capture, Physically-Based Modeling, Kinematics and Dynamics
Ronald Metoyer, Victor Zordan, Benjamin Hermens, Chun-Chi Wu, Marc Soriano, "Psychologically Inspired Anticipation and Dynamic Response for Impacts to the Head and Upper Body", IEEE Transactions on Visualization & Computer Graphics, vol. 14, no. , pp. 173-185, January/February 2008, doi:10.1109/TVCG.2007.70427