Název:	Pyramidal hemisphere subdivision radiosity. Definition and improvements
Autoři:	Jolivet, Vincent Plemenos, Dimitri Sbert, Mateu
Citace zdrojového dokumentu:	Journal of WSCG. 2000, vol. 8, no. 1-3.
Datum vydání:	2000
Nakladatel:	Václav Skala - UNION Agency
Typ dokumentu:	článek article
URI:	http://wscg.zcu.cz/wscg2000/wscg_2000_program.htm http://hdl.handle.net/11025/15960
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (online)
Klíčová slova:	Monte Carlo;dělení hemisfér;heuristické hledání;radiozita
Klíčová slova v dalším jazyce:	Monte Carlo;hemisphere subdivision;heuristic search;radiosity
Abstrakt v dalším jazyce:	In this paper a complete presentation of Pyramidal Hemisphere subdivision method is given. This method improves Monte Carlo radiosity by sending more rays towards selected directions. More precisely, we determine regions of the scene where the distribution of the energy must be done more accurately. The number of rays sent in a direction is function of a pyramidal region, defined by the center of the shooting patch and a spherical triangle on the surface of a hemisphere surrounding the patch, and the number of patches contained in this region. Thus, the rays shot from a patch have not all the same energy. This method allows us not only to obtain fine details much sooner and with lower cost, but also the overall efficiency is considerably increased. Next we present a new way to calculate the number of rays sent in a region by using a dynamic estimation of the visible patches in this region.
Práva:	© Václav Skala - UNION Agency
Vyskytuje se v kolekcích:	Volume 8, number 1-3 (2000)

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