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Animating Shapes at Arbitrary Resolution with Non-Uniform Stiffness

Matthieu Nesme 1 Yohan Payan 2 François Faure 3, 4, 5
2 TIMC-IMAG-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC-IMAG - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
3 EVASION - Virtual environments for animation and image synthesis of natural objects
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes, CNRS - Centre National de la Recherche Scientifique : FR71
5 ALCOVE - Collaborative interactive virtual environment
LIFL - Laboratoire d'Informatique Fondamentale de Lille, Inria Lille - Nord Europe
Abstract : We present a new method for physically animating deformable shapes using finite element models (FEM). Contrary to commonly used methods based on tetrahedra, our finite elements are the bounding voxels of a given shape at arbitrary resolution. This alleviates the complexities and limitations of tetrahedral volume meshing and results in regular, well-conditionned meshes. We show how to build the voxels and how to set the masses and stiffnesses in order to model the physical properties as accurately as possible at any given resolution. Additionally, we extend a fast and robust tetrahedron-FEM approach to the case of hexahedral elements. This permits simulation of arbitrarily complex shapes at interactive rates in a manner that takes into account the distribution of material within the elements.
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Submitted on : Thursday, June 11, 2009 - 6:14:43 PM
Last modification on : Wednesday, February 23, 2022 - 11:54:01 AM
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  • HAL Id : inria-00394475, version 1


Matthieu Nesme, Yohan Payan, François Faure. Animating Shapes at Arbitrary Resolution with Non-Uniform Stiffness. VRIPHYS, 2006, Madrid, Spain. ⟨inria-00394475⟩



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