Une synthèse des variantes du lancer de rayons et du lancer de faisceaux

Jean-Marc Hasenfratz 1, * Djamchid Ghazanfarpour
* Corresponding author
1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Graphisme, Vision et Robotique, Inria Grenoble - Rhône-Alpes
Abstract : Ray tracing is one of the most important rendering techniques used in computer graphics. However, two fundamental problems of classical ray tracers are aliasing (jaggies, disappearing small objects and small shadows) and important computational time. Many ways have been followed to solve these two problems. Some of them failed, others improve image quality and others optimize the computation time. In this paper, we present variants of ray tracing: solutions using only infinitesimal thick rays, solutions using volumetric rays called “beams” and solutions which mix these two types of rays. We propose two algorithms that occasionally use volumetric rays. One of them optimizes shadow determination and the other the visibility between two patches in the radiosity algorithm.
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Jean-Marc Hasenfratz, Djamchid Ghazanfarpour. Une synthèse des variantes du lancer de rayons et du lancer de faisceaux. Revue Internationale de CFAO et d'informatique graphique et d'informatique graphique, Hermès, 1998, 13 (3), pp.235-264. ⟨inria-00509984⟩

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