Title:	A vector model for global illumination in ray tracing
Authors:	Zaninetti, Jacques Peroche, Bernard
Citation:	Journal of WSCG. 1998, vol. 6, no. 1-3, p. 448-455.
Issue Date:	1998
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	http://hdl.handle.net/11025/15870 http://wscg.zcu.cz/wscg1998/wscg98.htm
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (online)
Keywords:	algoritmus vykreslování;sledování paprsku;stínování;globální osvětlení
Keywords in different language:	rendering algorithms;ray tracing;shading;global illumination
Abstract in different language:	This paper presents a method taking global illumination in ray tracing into account. A vector approach is introduced which allows to use any type of material, in particular with directional properties. This vector is decomposed into a direct component associated to light sources and an indirect one which corresponds to light having been reflected at least once. These components are estimated at a small number of points within the scene. A weighted interpolation between known values allows to reconstruct these components for the other points, with the help of gradient computation for the indirect component. Computed images are thus more accurate, at almost no additional cost, and no discretizing of the geometry of the scene is needed.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 6, number 1-3 (1998)

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