Real-time Large-deformation Substructuring
ACM SIGGRAPH 2011

People

• Jernej Barbič
  University of Southern California
• Yili Zhao
  University of Southern California

Project material

• Paper (PDF, 8 Mb)
• Video (Quicktime MP4, 108 Mb)
• Conference presentation slides (Powerpoint PPT, 72 Mb)
• Code (Polar Decomposition Gradient)
• Oak Tree Video (1920x1080) (Quicktime MP4, 33 Mb)

Citation

• Jernej Barbič, Yili Zhao:
  Real-time Large-deformation Substructuring, ACM Transactions on Graphics 30(4) (SIGGRAPH 2011), Aug 2011. BIBTEX

Abstract

This paper shows a method to extend 3D nonlinear elasticity model reduction to open-loop multi-level reduced deformable structures. Given a volumetric mesh, we decompose the mesh into several subdomains, build a reduced deformable model for each domain, and connect the domains using inertia coupling. This makes model reduction deformable simulations much more versatile: localized deformations can be supported without prohibitive computational costs, parts can be re-used and precomputation times shortened. Our method does not use constraints, and can handle large domain rigid body motion in addition to large deformations, due to our derivation of the gradient and Hessian of the rotation matrix in polar decomposition. We show real-time examples with multi-level domain hierarchies and hundreds of reduced degrees of freedom.

Comments, questions to Jernej Barbič.

Related projects

• Physics-based Character Skinning using Multi-Domain Subspace Deformations (Theodore Kim and Doug L. James)
• Real-Time Subspace Integration for St.Venant-Kirchhoff Deformable Models

Funding

• NSF (CAREER-53-4509-6600)
• James H. Zumberge Research and Innovation Fund at the Office of the Provost at the University of Southern California

Disclaimer

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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