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Soft Textured Shadow Volume

Forest Vincent 1 Loic Barthe 2 Gael Guennebaud 3, 4 Mathias Paulin 2 
2 IRIT-VORTEX - Visual Objects from Reality To Expression
IRIT - Institut de recherche en informatique de Toulouse
4 IPARLA - Visualization and manipulation of complex data on wireless mobile devices
Université Sciences et Technologies - Bordeaux 1, Inria Bordeaux - Sud-Ouest, École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), CNRS - Centre National de la Recherche Scientifique : UMR5800
Abstract : Efficiently computing robust soft shadows is a challenging and time consuming task. On the one hand, the quality of image-based shadows is inherently limited by the discrete property of their framework. On the other hand, object-based algorithms do not exhibit such discretization issues but they can only efficiently deal with triangles having a constant transmittance factor. This paper addresses this limitation. We propose a general algorithm for the computation of robust and accurate soft shadows for triangles with a spatially varying transmittance. We then show how this technique can be efficiently included into object-based soft shadow algorithms. This results in unified object-based frameworks for computing robust direct shadows for both standard and perforated triangles in fully animated scenes.
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Submitted on : Monday, May 23, 2011 - 4:27:14 PM
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  • HAL Id : inria-00390534, version 1


Forest Vincent, Loic Barthe, Gael Guennebaud, Mathias Paulin. Soft Textured Shadow Volume. Computer Graphics Forum, 2009, Proceedings of Eurographics Symposium on Rendering 2009, 28 (4), pp.1111--1120. ⟨inria-00390534⟩



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