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Fast simulation of skeleton-driven deformable body characters

Fast simulation of skeleton-driven deformable body characters Fast Simulation of Skeleton-Driven Deformable Body Characters JUNGGON KIM and NANCY S. POLLARD Carnegie Mellon University We propose a fast physically-based simulation system for skeleton-driven deformable body characters. Our system can generate realistic motions of self-propelled deformable body characters by considering the two-way interactions among the skeleton, the deformable body, and the environment in the dynamic simulation. It can also compute the passive jiggling behavior of a deformable body driven by a kinematic skeletal motion. We show that a well-coordinated combination of: (1) a reduced deformable body model with nonlinear nite elements, (2) a linear-time algorithm for skeleton dynamics, and (3) explicit integration can boost simulation speed to orders of magnitude faster than existing methods, while preserving modeling accuracy as much as possible. Parallel computation on the GPU has also been implemented to obtain an additional speedup for complicated characters. Detailed discussions of our engineering decisions for speed and accuracy of the simulation system are presented in the article. We tested our approach with a variety of skeleton-driven deformable body characters, and the tested characters were simulated in real time or near real time. Categories and Subject Descriptors: I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling ”Physically based http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Transactions on Graphics (TOG) Association for Computing Machinery

Fast simulation of skeleton-driven deformable body characters

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References (68)

Publisher
Association for Computing Machinery
Copyright
Copyright © 2011 by ACM Inc.
ISSN
0730-0301
DOI
10.1145/2019627.2019640
Publisher site
See Article on Publisher Site

Abstract

Fast Simulation of Skeleton-Driven Deformable Body Characters JUNGGON KIM and NANCY S. POLLARD Carnegie Mellon University We propose a fast physically-based simulation system for skeleton-driven deformable body characters. Our system can generate realistic motions of self-propelled deformable body characters by considering the two-way interactions among the skeleton, the deformable body, and the environment in the dynamic simulation. It can also compute the passive jiggling behavior of a deformable body driven by a kinematic skeletal motion. We show that a well-coordinated combination of: (1) a reduced deformable body model with nonlinear nite elements, (2) a linear-time algorithm for skeleton dynamics, and (3) explicit integration can boost simulation speed to orders of magnitude faster than existing methods, while preserving modeling accuracy as much as possible. Parallel computation on the GPU has also been implemented to obtain an additional speedup for complicated characters. Detailed discussions of our engineering decisions for speed and accuracy of the simulation system are presented in the article. We tested our approach with a variety of skeleton-driven deformable body characters, and the tested characters were simulated in real time or near real time. Categories and Subject Descriptors: I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling ”Physically based

Journal

ACM Transactions on Graphics (TOG) – Association for Computing Machinery

Published: Oct 1, 2011

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