Quick Cone Map Generation on the GPU

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013-016.pdf (18.6 MB)
Date
2022
Authors
Valasek, Gábor
Bán, Róbert
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
We propose an efficient conservative cone map generation algorithm that has T(N^2 logN) complexity for textures of dimension N ×N in contrast to the T(N^4) complexity of brute-force approaches. This is achieved by using a maximum mip texture of a heightmap to process all texels during the search for cone apertures, resulting in real-time generation times. Furthermore, we show that discarding already visited regions of neighboring mip texels widens the obtained cones considerably while still being conservative. Finally, we present a method to increase cone aperture tangents further at the expense of conservativeness. We compare our methods to brute-force and relaxed cone maps in generation and rendering performance.
Description

CCS Concepts: Computing methodologies --> Ray tracing; Shape modeling

        
@inproceedings{
10.2312:egs.20221021
,
booktitle = {
Eurographics 2022 - Short Papers
},
editor = {
Pelechano, Nuria
 and 
Vanderhaeghe, David
},
title = {{
Quick Cone Map Generation on the GPU
}},
author = {
Valasek, Gábor
 and 
Bán, Róbert
},
year = {
2022
},
publisher = {
The Eurographics Association
},
ISSN = {
1017-4656
},
ISBN = {
978-3-03868-169-4
},
DOI = {
10.2312/egs.20221021
}
}
Citation
URI
https://doi.org/10.2312/egs.20221021
 https://diglib.eg.org:443/handle/10.2312/egs20221021
Collections
EG 2022 - Short Papers