: From an input sequence (bottom) of a standing T. rex simulated via a Saint Venant-Kirchhoff deformation model, we edit the input motion with 27 space-time constraints to make the dinosaur squat & jump while trying to catch the small plane flying around it (top). We present a novel method for elastic animation editing with spacetime constraints. In a sharp departure from previous approaches, we not only optimize control forces added to a linearized dynamic model, but also optimize material properties to better match user constraints and provide plausible and consistent motion. Our approach achieves efficiency and scalability by performing all computations in a reduced rotation-strain (RS) space constructed with both cubature and geometric reduction, leading to two orders of magnitude improvement over the original RS method. We demonstrate the utility and versatility of our method in various applications, including motion editing, pose interpolation, and estimation of material parameters from existing animation sequences.
Elastic animation editing with spacetime constraints was discussed in REF that not only optimizes control forces added to a linearized dynamic model, but also optimizes material properties to better match user constraints and provide plausible and consistent motion.
Space-time editing of elastic motion through material optimization and reduction
TOGS
Computer Science