2026-04-13T00:03:25Zhttps://recercat.cat/oai/requestoai:recercat.cat:10256/71382024-06-14T10:06:31Zcom_2072_452955com_2072_2054col_2072_453069col_2072_453081
RECERCAT
author
Mas Baixeras, Albert
author
Martín Campos, Ignacio
author
Patow, Gustavo
2024-06-14T10:06:31Z
2024-06-14T10:06:31Z
2009
http://hdl.handle.net/10256/7138
This paper presents a new inverse reflector design method using a GPU-based computation of outgoing light distribution from reflectors. We propose a fast method to obtain the outgoing light distribution of a parametrized reflector, and then compare it with the desired illumination. The new method works completely in the GPU. We trace millions of rays using a hierarchical height-field representation of the reflector. Multiple reflections are taken into account. The parameters that define the reflector shape are optimized in an iterative procedure in order for the resulting light distribution to be as close as possible to the desired, user-provided one. We show that our method can calculate reflector lighting at least one order of magnitude faster than previous methods, even with millions of rays, complex geometries and light sourcesThis work was done under grant TIN2007-67120 from the Spanish Government, and under grant 7th Framework Programme-Capacities (grant No 222550, project EcoStreetLight) from the UE
Tots els drets reservats info:eu-repo/semantics/openAccess
Llums -- Disseny assistit per ordinador
Lamps -- Computer-aided design
Optimització matemàtica
Mathematical optimization
Fast Inverse Reflector Design (FIRD)
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion