Directionally Dependent Light Sources

Stéphane Albin and Bernard Péroche
École des Mines de Saint-Étienne
Department of LISSE
42023 Saint-Étienne



Keywords: Directional luminaires, Light Sources, Photometry, Rendering, Global Illumination.


This paper deals with light sources in computer graphics. Different kinds of light sources and different types of solutions generally used are first described. Then, a new solution for directionally dependent light sources based on No\'e and P\'eroche's model\cite{Noe00-HRBLS*} is proposed to avoid drawbacks of bilinear interpolation. The use of singular integrals with locally supported functions allows a fast and accurate reconstruction of goniometric diagrams. Application to point light sources is finally compared with some experimental results.