Hasso-Plattner-Institut
  
Hasso-Plattner-Institut
Prof. Dr. Jürgen Döllner
  
 

Publications

Real-Time Soft Shadows Using a Single Light Sample

Kirsch, Florian and Döllner, Jürgen
International Winter School of Computer Graphics, Journal of WSCG, vol. 11(2):255–262 2003

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.

BibTeX file

@article{KD03,
author = { Kirsch, Florian and D{\"o}llner, J{\"u}rgen },
title = { Real-Time Soft Shadows Using a Single Light Sample },
pages = { 255--262 },
year = { 2003 },
journal = { International Winter School of Computer Graphics, Journal of WSCG },
volume = { 11 },
number = { 2 }
}

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last change: Fri, 14 Aug 2009 11:28:51 +0200