Journal
COMPUTER GRAPHICS FORUM
Volume 32, Issue 1, Pages 36-48Publisher
WILEY
DOI: 10.1111/j.1467-8659.2012.03230.x
Keywords
deformable objects; finite element method; non-linear; practice and experience; open source
Categories
Funding
- National Science Foundation [CAREER-53-4509-6600]
- James H. Zumberge Research and Innovation Fund at the University of Southern California
- Direct For Computer & Info Scie & Enginr
- Div Of Information & Intelligent Systems [1055035] Funding Source: National Science Foundation
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This practice and experience paper describes a robust C++ implementation of several non-linear solid three-dimensional deformable object strategies commonly employed in computer graphics, named the Vega finite element method (FEM) simulation library. Deformable models supported include co-rotational linear FEM elasticity, SaintVenant Kirchhoff FEM model, massspring system and invertible FEM models: neo-Hookean, SaintVenant Kirchhoff and MooneyRivlin. We provide several timestepping schemes, including implicit Newmark and backward Euler integrators, and explicit central differences. The implementation of material models is separated from integration, which makes it possible to employ our code not only for simulation, but also for deformable object control and shape modelling. We extensively compare the different material models and timestepping schemes. We provide practical experience and insight gained while using our code in several computer animation and simulation research projects.
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