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WSCG
2004

Fast Intensity Distribution Functions for Soft and Hard Edged Spotlights

11 years 1 months ago
Fast Intensity Distribution Functions for Soft and Hard Edged Spotlights
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. Keywords Spotlights, Beam Angle, Field Angle, Luminous intensity distribution.
Anders Hast, Tony Barrera, Ewert Bengtsson
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2004
Where WSCG
Authors Anders Hast, Tony Barrera, Ewert Bengtsson
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