Wind projection basis for real-time animation of trees

Julien Diener 1 Mathieu Rodriguez 2, 3 Lionel Baboud 4 Lionel Reveret 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
4 ARTIS - Acquisition, representation and transformations for image synthesis
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
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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Submitted on : Tuesday, October 21, 2008 - 10:41:16 AM
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  • HAL Id : inria-00328122, version 2

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Julien Diener, Mathieu Rodriguez, Lionel Baboud, Lionel Reveret. Wind projection basis for real-time animation of trees. [Research Report] RR-6674, INRIA. 2008, pp.20. ⟨inria-00328122v2⟩

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