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Physics-based character skinning using multidomain subspace deformations.

Theodore Kim1, Doug L James

  • 1Media Arts and Technology Program, University of California at Santa Barbara, Santa Barbara, CA 93106-6065, USA. kim@mat.ucsb.edu

IEEE Transactions on Visualization and Computer Graphics
|March 7, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a subspace framework for simulating articulated deformable characters, achieving interactive rates and significant speedups. The domain-decomposition method efficiently handles complex deformations and materials.

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Area of Science:

  • Computer Animation
  • Deformable Models
  • Numerical Simulation

Background:

  • Simulating articulated deformable characters is computationally intensive.
  • Existing methods often struggle with nonlinearities and achieving interactive rates.
  • Coupling low-rank domain models can lead to artificial rigidity.

Purpose of the Study:

  • To present a domain-decomposition method for simulating articulated deformable characters within a subspace framework.
  • To enhance simulation efficiency and support quasistatic and dynamic deformations.
  • To analyze parallelization and eigendecomposition performance.

Main Methods:

  • Utilizes a subspace framework for character simulation.
  • Employs penalty-based coupling forces to avoid artificial rigidity.
  • Introduces a novel Fast Sandwich Transform (FST) for efficient constraint force evaluation between rotated domains.

Main Results:

  • Achieves interactive time-stepping rates for complex deformations.
  • Demonstrates efficient simulation of articulated characters with hundreds of coupled modes.
  • Reports speedups of 3-4 orders of magnitude compared to full-rank simulations.

Conclusions:

  • The domain-decomposition subspace method offers significant performance improvements for simulating articulated deformable characters.
  • The approach effectively handles nonlinear kinematics and materials.
  • Enables efficient and interactive simulation of complex deformable systems.