AN EMPIRICAL EVALUATION OF A GPU RADIOSITY SOLVER

Guenter Wallner

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Paper

AN EMPIRICAL EVALUATION OF A GPU RADIOSITY SOLVER

Topics: Rendering Algorithms; Shadows, Translucency and Visibility

In Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 0VISIGRAPP, 225-232, 2010 , Angers, France

Author: Guenter Wallner

Affiliation: University of Applied Arts, Austria

Keyword(s): Global illumination, Radiosity, GPU programming, Projections.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Rendering ; Rendering Algorithms ; Shadows, Translucency and Visibility

Abstract: This paper presents an empirical evaluation of a GPU radiosity solver which was described in the authors previous work. The implementation is evaluated in regard to rendering times in comparision with a classical CPU implementation. Results show that the GPU implementation outperforms the CPU algorithm in most cases, most importantly, in cases where the number of radiosity elements is high. Furthermore, the impact of the projection -- which is used for determining the visibility -- on the quality of the rendering is assessed. Results gained with a hemispherical projection performed in a vertex shader and with a real non-linear hemispherical projection are compared against the results of the hemicube method. Based on the results of the evaluation, possible improvements for further research are pointed out.

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Paper citation in several formats:

Wallner, G. (2010). AN EMPIRICAL EVALUATION OF A GPU RADIOSITY SOLVER. In Proceedings of the International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2010) - GRAPP; ISBN 978-989-674-026-9; ISSN 2184-4321, SciTePress, pages 225-232. DOI: 10.5220/0002822202250232

@conference{grapp10,
author={Guenter Wallner.},
title={AN EMPIRICAL EVALUATION OF A GPU RADIOSITY SOLVER},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2010) - GRAPP},
year={2010},
pages={225-232},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002822202250232},
isbn={978-989-674-026-9},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2010) - GRAPP
TI - AN EMPIRICAL EVALUATION OF A GPU RADIOSITY SOLVER
SN - 978-989-674-026-9
IS - 2184-4321
AU - Wallner, G.
PY - 2010
SP - 225
EP - 232
DO - 10.5220/0002822202250232
PB - SciTePress