Efficient Simulation of Secondary Motion in Rig-Space


We present an efficient method for augmenting keyframed character animations with physically-simulated secondary motion.

July 19, 2013
ACM SIGGRAPH / Eurographics Symposium on Computer Animation (SCA) 2013



Fabian Hahn (Disney Research/ETH Joint PhD)

Bernhard Thomaszewski (Disney Research)

Stelian Coros (Disney Research)

Robert W. Sumner (Disney Research)

Markus Gross (Disney Research/ETH Zurich)

Efficient Simulation of Secondary Motion in Rig-Space


Our method achieves a performance improvement of one to two orders of magnitude over previous work without compromising on quality. This performance is based on a linearized formulation of rigspace dynamics that uses only rig parameters as degrees of freedom, a physics-based volumetric skinning method that allows our method to predict the motion of internal vertices solely from deformations of the surface, as well as a deferred Jacobian update scheme that drastically reduces the number of required rig evaluations. We demonstrate the performance of our method by comparing it to previous work and showcase its potential on a production quality character rig.

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