Point-based rendering of trees

Guillaume Gilet 1 Alexandre Meyer 1 Fabrice Neyret 1
1 EVASION - Virtual environments for animation and image synthesis of natural objects
GRAVIR - IMAG - Graphisme, Vision et Robotique, Inria Grenoble - Rhône-Alpes, CNRS - Centre National de la Recherche Scientifique : FR71
Abstract : The goal of this paper is the interactive and realistic rendering of 3D trees covering a landscape. The landscape is composed by instantiating one or more block of vegetation on the terrain. A block of vegetation is composed by a single or a compact group of trees. For these blocks of vegetation, we propose a new representation based on triangle+point primitives organized into a regular spatial structure (grid). This structure is defined onto easily adapt the level of details (LOD) of each subpart (cell) of the vegetation element. During the rendering process, we determine a global level of details for each block of vegetation. Then, we refine it for each cell according to the following heuristic: leaves or branches on the rear of tree or inside the forest are statistically less visible than front ones and then can be rendered coarsely. As a result, our method greatly decrease the number of rendered primitives by preserving realism. This allows rendering of large landscape in interactive time, for a camera far away until inside.
Type de document :
Communication dans un congrès
Pierre Poulin and Eric Galin. Eurographics Workshop on Natural Phenomena, Aug 2005, Dublin, Ireland. Eurographics Association, pp.67-72, 2005, 〈http://www.eg.org/EG/DL/WS/NPH/NPH05/067-072.pdf〉. 〈10.2312/NPH/NPH05/067-072〉
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Contributeur : Fabrice Neyret <>
Soumis le : jeudi 18 novembre 2010 - 15:24:51
Dernière modification le : jeudi 16 novembre 2017 - 08:42:02
Document(s) archivé(s) le : samedi 19 février 2011 - 03:03:51

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Guillaume Gilet, Alexandre Meyer, Fabrice Neyret. Point-based rendering of trees. Pierre Poulin and Eric Galin. Eurographics Workshop on Natural Phenomena, Aug 2005, Dublin, Ireland. Eurographics Association, pp.67-72, 2005, 〈http://www.eg.org/EG/DL/WS/NPH/NPH05/067-072.pdf〉. 〈10.2312/NPH/NPH05/067-072〉. 〈inria-00537448〉

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