Bidirectional scattering distribution function: Difference between revisions

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The definition of the '''BSDF''' ('''Bidirectional scattering distribution function''') is not well standardized. The term was probably introduced in 19911980 by ''PaulBartell, Heckbert''Dereniak, and Wolfe{{Ref|endnote_veach1997_aendnote_bartell1980}}. Most often it is used to name the general mathematical function which describes the way in which the light is scattered by a surface. However in practice this phenomenon is usually split into the reflected and transmitted components, which are then treated separately as '''BRDF''' ('''[[Bidirectional reflectance distribution function]]''') and '''BTDF''' ('''Bidirectional transmittance distribution function''').

[[Image:BSDF05 800.png|thumb|right|280px|BSDF: BRDF + BTDF]]

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==References==

{{Reflist|2}}

# {{note |endnote_bartell1980}}F. O. Bartell, E. L. Dereniak, and W. L. Wolfe (1980), ''[http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1230783 "The theory and measurement of bidirectional reflectance distribution function (BRDF) and bidirectional transmittance distribution function (BTDF)"]''. Proceedings of SPIE Vol. 257 Radiation Scattering in Optical Systems, pp. 154-160.

# {{note |endnote_veach1997_a}} Eric Veach (1997), ''[http://graphics.stanford.edu/papers/veach_thesis/thesis-bw.pdf "Robust Monte Carlo Methods for Light Transport Simulation"]'', [http://graphics.stanford.edu/papers/veach_thesis/chapter3.ps page 86]<br>citing ''Paul Heckbert (1991). "Simulating Global Illumination Using Adaptive Meshing", PhD thesis'', University of California, Berkeley, page 26.

#{{note |endnote_rauw}} Randall Rauwendaal''[http://graphics.cs.ucdavis.edu/~bcbudge/ecs298_2004/General_BSDFs_BSSDFs.ppt "Rendering General BSDFs and BSSDFs"]''

#{{note |nicodemus_1977}} The original definition in Nicodemus et al. 1977 has ''scattering surface'', but somewhere along the way, the word ordering was reversed.