Novosibirsk State University Journal of Information Technologies
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ISSN 2410-0420 (Online), ISSN 1818-7900 (Print)

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All Issues >> Contents: Volume 07, Issue No 2 (2009)

Soft shadow generation via recursive ray tracing
V. A. Debelov, I. E. Novikov

Abstract
The problem of computational complexity for a calculation of hard shadows and generation of soft shadows via the light backwards recursive ray tracing algorithm is considered. Basing on exact formulations advantages and drawbacks of popular algorithms for hard shadow generation are demonstrated. Along with basic «shadow map» and «shadow volume» algorithms their modifications that allow to produce soft shadows are considered too. The light meshes method (LMM) is formulated, and algorithms developed for its acceleration are described. Also in the paper are defined the place and value of LMM in the whole palette of Whitted-like algorithms.

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Publication information
Main title Vestnik NSU Series: Information Technologies, Volume 07, Issue No 2 (2009).
Parallel title: Novosibirsk State University Journal of Information Technologies Volume 07, Issue No 2 (2009).

Key title: Vestnik Novosibirskogo gosudarstvennogo universiteta. Seriâ: Informacionnye tehnologii
Abbreviated key title: Vestn. Novosib. Gos. Univ., Ser.: Inf. Tehnol.
Variant title: Vestnik NGU. Seriâ: Informacionnye tehnologii

Year of Publication: 2009
ISSN: 1818-7900 (Print), ISSN 2410-0420 (Online)
Publisher: Novosibirsk State University Press
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