Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19395
Title: Visibility in the presence of occluders with curved boundaries
Authors: Baciu, G 
Yu, C
Keywords: Brightness
Computational geometry
Hidden feature removal
Lighting
Mesh generation
Rendering (computer graphics)
Visibility
Issue Date: 2000
Publisher: IEEE
Source: The Eighth Pacific Conference on Computer Graphics and Applications, 2000 : proceedings : 3-5 October 2000, Hong Kong, p. 105-441 How to cite?
Abstract: Accurate global visibility information has become essential in global illumination rendering. Combinatorial structures, such as the visibility complex, aspect graphs and the visibility skeleton, are the seeds of a new topic of research motivated by practical problems in computer graphics and global illumination rendering. This is now attracting interest from the computational geometry, combinatorics, CAD and robotics communities. The initial motivation has been to accurately represent shadow boundaries generated by occluding surfaces in the path of light from emitting surfaces (sources) to receiving surfaces (receivers). This article adds to the rich body of research in this field by presenting solutions to the problem of occluders with curved boundaries. This has profound implications in three main areas: (1) the generation, maintenance and search functions associated with the global visibility complex, (2) mesh generation, and (3) global illumination rendering. We present a new visibility complex based on the proposed visibility skeleton. The new visibility complex has been designed to handle not only polygonal elements but also surfaces with curved boundaries. We have found that, even in simple 3D scenes, the new visibility complex generates less polygons in the meshing phase and a more accurate global illumination
URI: http://hdl.handle.net/10397/19395
ISBN: 0-7695-0868-5
DOI: 10.1109/PCCGA.2000.883932
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