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- W129677540 abstract "Publisher Summary This chapter discusses derivation of an approximation for the calculation of a shadow attenuation term for shadow generation. It highlights that an accurate, general, computable algorithm for calculating the amount of light that passes through transparent surfaces to reach the point being illuminated is difficult to construct. Objects such as glass lenses tend to focus light onto the point being illuminated. To demonstrate the difficulty in constructing an accurate model, the light being focused through a simple lens can be considered. The solution for light being focused through a lens onto a single point on the surface is a continuous area of the lens. Determination of the focusing areas for arbitrary multiple transparent surfaces is extremely difficult. However, if focusing effects are ignored, the shadow model becomes much simpler. The chapter presents an approximation that has been used by the ray-tracing project at the University of Tulsa. It describes a naive scheme and an improved scheme." @default.
- W129677540 created "2016-06-24" @default.
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- W129677540 date "1991-01-01" @default.
- W129677540 modified "2023-09-23" @default.
- W129677540 title "MORE SHADOW ATTENUATION FOR RAY TRACING TRANSPARENT OR TRANSLUCENT OBJECTS" @default.
- W129677540 doi "https://doi.org/10.1016/b978-0-08-050754-5.50061-x" @default.
- W129677540 hasPublicationYear "1991" @default.
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