Article

Splatting with shadows

Authors:

Manjushree Nulkar,

Klaus MuellerAuthors Info & Claims

VG'01: Proceedings of the 2001 Eurographics conference on Volume Graphics

Pages 35 - 50

Published: 21 June 2001 Publication History

Abstract

In this paper we describe an efficient approach to add shadows to volumetric scenes. The light emitted by the lightsource is properly attenuated by the intervening volumetric structures before it is reflected towards the eye. Both parallel and perspective lightsources can be efficiently and accurately modeled.We use a two-stage splatting approach. In the first stage, a light volume is constructed in O(N³) time, which is about the same time it takes to render a regular image. This light volume stores the volumetric attenuated light arriving at each grid voxel and only needs to be recomputed if the light source is moved. If only diffuse shading is required, then the contribution of any number of lightsources can be stored in the same space. The second stage is formed by the usual rendering pipeline. The only difference is that the light contributions are interpolated from the light volume, instead of using the constant light source intensity. Once the light volume is computed, the actual rendering is only marginally more expensive than in the unshadowed case. The rendered images, however, convey three-dimensional relationships much better and look considerably more realistic, which is clearly needed if volume graphics is to become a mainstream technology.

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Cited By

Jönsson DSundén EYnnerman ARopinski T(2014)A Survey of Volumetric Illumination Techniques for Interactive Volume RenderingComputer Graphics Forum10.1111/cgf.1225233:1(27-51)Online publication date: 1-Feb-2014
https://dl.acm.org/doi/10.1111/cgf.12252
Stewart A(2003)Vicinity Shading for Enhanced Perception of Volumetric DataProceedings of the 14th IEEE Visualization 2003 (VIS'03)10.1109/VISUAL.2003.1250394Online publication date: 22-Oct-2003
https://dl.acm.org/doi/10.1109/VISUAL.2003.1250394
Kniss JPremoze SHansen CShirley PMcPherson A(2003)A Model for Volume Lighting and ModelingIEEE Transactions on Visualization and Computer Graphics10.1109/TVCG.2003.11960039:2(150-162)Online publication date: 1-Apr-2003
https://dl.acm.org/doi/10.1109/TVCG.2003.1196003
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Splatting with shadows
1. Computing methodologies
  1. Computer graphics

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cover image Guide Proceedings

VG'01: Proceedings of the 2001 Eurographics conference on Volume Graphics

June 2001

409 pages

ISBN:321183737X

Publisher

Eurographics Association

Goslar, Germany

Publication History

Published: 21 June 2001

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Cited By

Jönsson DSundén EYnnerman ARopinski T(2014)A Survey of Volumetric Illumination Techniques for Interactive Volume RenderingComputer Graphics Forum10.1111/cgf.1225233:1(27-51)Online publication date: 1-Feb-2014
https://dl.acm.org/doi/10.1111/cgf.12252
Stewart A(2003)Vicinity Shading for Enhanced Perception of Volumetric DataProceedings of the 14th IEEE Visualization 2003 (VIS'03)10.1109/VISUAL.2003.1250394Online publication date: 22-Oct-2003
https://dl.acm.org/doi/10.1109/VISUAL.2003.1250394
Kniss JPremoze SHansen CShirley PMcPherson A(2003)A Model for Volume Lighting and ModelingIEEE Transactions on Visualization and Computer Graphics10.1109/TVCG.2003.11960039:2(150-162)Online publication date: 1-Apr-2003
https://dl.acm.org/doi/10.1109/TVCG.2003.1196003
Zhang CCrawfis R(2003)Shadows and Soft Shadows with Participating Media Using SplattingIEEE Transactions on Visualization and Computer Graphics10.1109/TVCG.2003.11960029:2(139-149)Online publication date: 1-Apr-2003
https://dl.acm.org/doi/10.1109/TVCG.2003.1196002
Kniss JPremoze SHansen CEbert DPfister HBailey MSwan JThomas J(2002)Interactive translucent volume rendering and procedural modelingProceedings of the conference on Visualization '0210.5555/602099.602114(109-116)Online publication date: 27-Oct-2002
https://dl.acm.org/doi/10.5555/602099.602114
Zhang CCrawfis RPfister HBailey MSwan JThomas J(2002)Volumetric shadows using splattingProceedings of the conference on Visualization '0210.5555/602099.602111(85-92)Online publication date: 27-Oct-2002
https://dl.acm.org/doi/10.5555/602099.602111
Dobashi YYamamoto TNishita TLastra ASchneider B(2002)Interactive rendering of atmospheric scattering effects using graphics hardwareProceedings of the ACM SIGGRAPH/EUROGRAPHICS conference on Graphics hardware10.5555/569046.569060(99-107)Online publication date: 1-Sep-2002
https://dl.acm.org/doi/10.5555/569046.569060

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