Physically Based Motion Transformation

We introduce a novel algorithm for transforming character animation sequences that preserves essential physical properties of the motion. By using the spacetime constraints dynamics formulation our algorithm maintains realism of the original motion sequence without sacrificing full user control of the editing process. In contrast to most physically based animation techniques that synthesize motion from scratch, we take the approach of motion transformation as the underlying paradigm for generating computer animations. In doing so, we combine the expressive richness of an input animation sequence with the controllability of spacetime optimization to create a wide range of realistic character animations. The spacetime dynamics formulation also allows editing of intuitive, high-level motion concepts such as the time and placement of footprints, length and mass of various extremities, number of body joints and gravity. Our algorithm is well suited for the reuse of highly-detailed capture...

• Type: Conference
• Year: 1999
• Where: SIGGRAPH
• Authors: Zoran Popovic, Andrew P. Witkin
• Keywords: Computer Graphics, Original Motion Sequence, SIGGRAPH 1999, Spacetime Constraints Dynamics, Spacetime Optimization