| Title: | Pyramidal hemisphere subdivision radiosity. Definition and improvements |
| Authors: | Jolivet, Vincent Plemenos, Dimitri Sbert, Mateu |
| Citation: | Journal of WSCG. 2000, vol. 8, no. 1-3. |
| Issue Date: | 2000 |
| Publisher: | Václav Skala - UNION Agency |
| Document type: | 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) |
| Keywords: | Monte Carlo;dělení hemisfér;heuristické hledání;radiozita |
| Keywords in different language: | Monte Carlo;hemisphere subdivision;heuristic search;radiosity |
| Abstract in different language: | 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. |
| Rights: | © Václav Skala - UNION Agency |
| Appears in Collections: | Volume 8, number 1-3 (2000) |
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11025/15960Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.