Simulation Physique Interactive pour la Synthèse d'Images

François Faure 1
1 EVASION - Virtual environments for animation and image synthesis of natural objects
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
Abstract : We consider mechanical simulations in moving image synthesis applications, especially in real time, such as video games or simulators. Interactive physical simulation has made large progress in the recent years, but it has not yet reached enough maturity to be usable by non-specialist over a large variety of models. We present contributions toward this goal. Soft object models are generally based on deformable cells. We have proposes fast and robust tetrahedral elements, and generalized the approach to regular hexahedral grids which greatly simplify the problems of meshing and controling the resolution. Collision detection and response are geometrically complex and mechanically discontinuous problems, which often create bottlenecks in the simulations. We have proposed solutions to control the computation time devoted to detection, to alleviate the problems due to multiple geometric models of the contact surfaces, as well as the robustness of the reaction and its computation on GPU. Much attention has been paid to software architecture in order to allow both modularity and efficiency. We propose a mechanical scene graph which allows to build model hierarchies and to decompose the simulation algorithms in independent modules. We have also investigated the distribution of the computations in parallel architectures, made necessary by the recent evolution of hardware.
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Habilitation à diriger des recherches
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Submitted on : Monday, November 10, 2008 - 11:36:36 AM
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François Faure. Simulation Physique Interactive pour la Synthèse d'Images. Modélisation et simulation. Université Joseph-Fourier - Grenoble I, 2008. ⟨tel-00336707⟩

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