Enhanced rig-space simulation

Rig‐space physics a finite element method(FEM) based simulation technique that aims at adding secondary motion on a character while maintaining seamless cooperation with traditional animation pipelines. We enhance the rig‐space physics by introducing several techniques, including general field inter...

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Bibliographic Details
Published in:Computer animation and virtual worlds 2016-05, Vol.27 (3-4), p.250-261
Main Authors: Li, Guiqing, Ouyang, Yaobin, Wei, Guodong, Zhang, Zhibang, Mao, Aihua
Format: Article
Language:English
Subjects:
Algorithms
Animation
computer animation
Computer simulation
Conjugate gradients
Finite element method
Materials control
Numerical stability
parametric space
physically based modeling
rigging
secondary motion
Trajectories
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Summary:Rig‐space physics a finite element method(FEM) based simulation technique that aims at adding secondary motion on a character while maintaining seamless cooperation with traditional animation pipelines. We enhance the rig‐space physics by introducing several techniques, including general field interaction, proportional‐derivative control, and improved material control. This allows an animator to perform various interferences to the simulation process and create more abundant animation effects. Moreover, we also improve the numerical stability of the simulation algorithm by prepending a conjugate gradient procedure. Copyright © 2016 John Wiley & Sons, Ltd. We allow user to define various fields, which are not necessarily conservative, on the mesh model to be simulated. We introduce proportional‐derivative control to specify target rig‐parameter trajectories and strength of control forces and therefore are able to trace the target trajectories as an entity. We improve the numerical stability for some tricky situations by prepending a conjugate gradient procedure to the original algorithm.
ISSN:1546-4261
1546-427X
DOI:10.1002/cav.1705