Title: Real-time soft shadows using a single light sample
Authors: Kirsch, Florian
Döllner, Jürgen
Citation: Journal of WSCG. 2003, vol. 11, no. 1-3.
Issue Date: 2003
Publisher: UNION Agency – Science Press
Document type: článek
URI: http://wscg.zcu.cz/wscg2003/Papers_2003/B19.pdf
ISSN: 1213-6972
Keywords: real-time vykreslování;stíny;grafický hardware
Keywords in different language: real-time rendering;shadows;graphic hardware
Abstract: We present a real-time rendering algorithm that generates soft shadows of dynamic scenes using a single light sample. As a depth-map algorithm it can handle arbitrary shadowed surfaces. The shadow-casting surfaces, however, should satisfy a few geometric properties to prevent artifacts. Our algorithm is based on a bivariate attenuation function, whose result modulates the intensity of a light causing shadows. The first argument specifies the distance of the occluding point to the shadowed point; the second argument measures how deep the shadowed point is inside the shadow. The attenuation function can be implemented using dependent texture accesses; the complete implementation of the algorithm can be accelerated by today's graphics hardware. We outline the implementation, and discuss details of artifact prevention and filtering.
Rights: © UNION Agency – Science Press
Appears in Collections:Volume 11, number 1-3 (2003)

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/1613

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