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inria-00328122, version 2

Wind projection basis for real-time animation of trees

Julien Diener () a, 1, Mathieu Rodriguez () 2, 3, Lionel Baboud () a, 4, Lionel Reveret () b, 1

N° RR-6674 (2008)

Abstract: This scientific report presents a real-time method to animate complex scenes of thousands of trees under a user-controllable wind load. Firstly, modal analysis is applied to extract the main modes of deformation from the mechanical model of a 3D tree. The novelty of our contribution is to precompute a new basis of the modal stress of the tree under wind load. At runtime, this basis allows to replace the modal projection of the external forces by a direct mapping for any directional wind. We show that this approach can be efficiently implemented on a graphics hardware. This modal animation can be simulated at low computation cost even for large scenes containing thousands of trees.

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  • a –  MENRT
  • b –  INRIA
  • 1:  EVASION (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
  • CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Institut National Polytechnique de Grenoble (INPG) – Université Joseph Fourier - Grenoble I – Université Pierre-Mendès-France - Grenoble II
  • 2:  Laboratoire d'hydrodynamique (LadHyX)
  • CNRS : UMR7646 – Polytechnique - X
  • 3:  Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF)
  • Institut national de la recherche agronomique (INRA) : UMRA547 – Université Blaise Pascal - Clermont-Ferrand II
  • 4:  ARTIS (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
  • CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG)
  • Domain : Computer Science/Modeling and Simulation
    Computer Science/Computer Graphics and Virtual Reality
  • Keywords : Animation – physical simulation – tree – modal analysis – real-time
  • Internal note : RR-6674
  • Available versions :  v1 (2008-10-09) v2 (2008-10-21)
 
  • inria-00328122, version 2
  • http://hal.inria.fr/inria-00328122
  • oai:hal.inria.fr:inria-00328122
  • From: Julien Diener <>
  • Submitted on: Tuesday, 21 October 2008 10:41:16
  • Updated on: Saturday, 23 March 2013 00:04:08