Title: Fast instensity functions for soft and hard edged spotlights
Authors: Hast, Anders
Barrera, Tony
Bengtsson, Ewert
Citation: WSCG '2004: Short Communications: the 12-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2004, 2.-6. February 2004 Plzeň, p. 95-100.
Issue Date: 2004
Publisher: Václav Skala - UNION Agency
Document type: konferenční příspěvek
URI: http://wscg.zcu.cz/wscg2004/Papers_2004_Short/H73.pdf
ISBN: 80-903100-5-2
Keywords: reflektory;distribuční funkce;intenzita světla;počítačové modelování
Keywords in different language: spotlights;distribution function;luminous intensity;computer modelling
Abstract: The purpose of this paper is twofold: to propose two fast distribution functions for spotlights and to use terminology used in stage lighting to model these luminaries. In OpenGL and other API’s the original Warn model is used where the light distribution is computed using a power function. In professional modeling tools, a linear or a cubic function is often used. We propose the use of two different quadratic functions instead that will make the computation involved faster than using the power function or a cubic function. Moreover it will be more flexible than using a linear function. These functions can be used to model both hard and soft edged spotlights.
Rights: © Václav Skala - UNION Agency
Appears in Collections:WSCG '2004: Short Communications

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