Faculty of Information Technology, BUT

Publication Details

Fast robust and precise shadow algorithm for WebGL 1.0 platform

MILET Tomáš, TÓTH Michal, PEČIVA Jan, STARKA Tomáš, KOBRTEK Jozef and ZEMČÍK Pavel. Fast robust and precise shadow algorithm for WebGL 1.0 platform. In: ICAT-EGVE 2015 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments. Kyoto: Eurographics Association, 2015, pp. 85-92. ISBN 978-3-905674-84-2.
Czech title
Rychlé, robustní a přesné stíny pro platformu WebGL 1.0
Type
conference paper
Language
english
Authors
Milet Tomáš, Ing. (DCGM FIT BUT)
Tóth Michal, Ing. (DCGM FIT BUT)
Pečiva Jan, Ing., Ph.D. (DCGM FIT BUT)
Starka Tomáš, Ing. (DCGM FIT BUT)
Kobrtek Jozef, Ing. (DCGM FIT BUT)
Zemčík Pavel, prof. Dr. Ing. (DCGM FIT BUT)
Keywords
shadow volumes, silhouettes, precise shadows, WebGL, vertex Shader, robust method
Abstract
This paper presents fast and robust per-sample correct WebGL shadow method. It is based on silhouette shadow volumes. Our performance is usually superior when compared with high resolution shadow maps and it does not suffer from visual artefacts. Specially precomputed data are fed to the vertex shaders that extrude shadow volumes.
Annotation
This paper presents fast and robust per-sample correct shadows for WebGL platform. The algorithm is based on silhouette shadow volumes and it rivals the standard shadow mapping performance. Our performance is usually superior when compared with high resolution shadow maps. Moreover, it does not suffer from a number of artefacts of shadow mapping and always provides per-pixel correct results. WebGL 1.0 provides just vertex and fragment shaders. Thus, we put all our algorithms evaluating silhouette edges to vertex shaders. Specially precomputed data are fed to the vertex shaders that extrude shadow volume sides just for silhouette edges. Some optimizations are deployed for performance and data size reasons that are important especially on low performance configurations, such as cost-effective tablets and mobile phones. The paper evaluates our solution on number of models. Our solution performs on par with high resolution omni-directional shadow mapping.
Published
2015
Pages
85-92
Proceedings
ICAT-EGVE 2015 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
Conference
ICAT-EGVE 2015, Kyoto, JP
ISBN
978-3-905674-84-2
Publisher
Eurographics Association
Place
Kyoto, JP
DOI
BibTeX
@INPROCEEDINGS{FITPUB10946,
   author = "Tom\'{a}\v{s} Milet and Michal T\'{o}th and Jan Pe\v{c}iva and Tom\'{a}\v{s} Starka and Jozef Kobrtek and Pavel Zem\v{c}\'{i}k",
   title = "Fast robust and precise shadow algorithm for WebGL 1.0 platform",
   pages = "85--92",
   booktitle = "ICAT-EGVE 2015 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments",
   year = 2015,
   location = "Kyoto, JP",
   publisher = "Eurographics Association",
   ISBN = "978-3-905674-84-2",
   doi = "10.2312/egve.20151314",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/10946"
}
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