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Solid Angle Sampling of Disk and Cylinder Lights

Author:

Manuel N. GamitoAuthors Info & Claims

Computer Graphics Forum, Volume 35, Issue 4

Pages 25 - 36

Published: 01 July 2016 Publication History

Abstract

A new unbiased sampling approach is presented, which allows the direct illumination from disk and cylinder light sources to be sampled with a uniform probability distribution within their solid angles, as seen from each illuminated point. This approach applies to any form of global illumination path tracing algorithm forward or bidirectional, where the direct illumination integral from light sources needs to be estimated. We show that taking samples based on the solid angle of these two light sources leads to improved estimates and reduced variance of the Monte Carlo integral for direct illumination. This work follows from previously known unbiased methods for the solid angle sampling of triangular and rectangular light sources and extends the class of lights that can be rendered with these improved sampling algorithms.

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Cited By

Lu HChang WHedstrom TLi T(2024)Real-Time Path Guiding Using Bounding Voxel SamplingACM Transactions on Graphics10.1145/365820343:4(1-14)Online publication date: 19-Jul-2024
https://dl.acm.org/doi/10.1145/3658203
Shah IKT ANarayanan P(2023)Combining Resampled Importance and Projected Solid Angle Samplings for Many Area Light RenderingSIGGRAPH Asia 2023 Technical Communications10.1145/3610543.3626165(1-4)Online publication date: 28-Nov-2023
https://dl.acm.org/doi/10.1145/3610543.3626165
Peters CDachsbacher C(2019)Sampling Projected Spherical Caps in Real TimeProceedings of the ACM on Computer Graphics and Interactive Techniques10.1145/33202822:1(1-16)Online publication date: 3-Jun-2019
https://dl.acm.org/doi/10.1145/3320282
Show More Cited By

Index Terms

Solid Angle Sampling of Disk and Cylinder Lights
1. Computing methodologies
  1. Computer graphics
    1. Rendering
      1. Ray tracing

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Published In

cover image Computer Graphics Forum

Computer Graphics Forum Volume 35, Issue 4

July 2016

132 pages

ISSN:0167-7055

EISSN:1467-8659

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Publisher

The Eurographs Association & John Wiley & Sons, Ltd.

Chichester, United Kingdom

Publication History

Published: 01 July 2016

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Cited By

Lu HChang WHedstrom TLi T(2024)Real-Time Path Guiding Using Bounding Voxel SamplingACM Transactions on Graphics10.1145/365820343:4(1-14)Online publication date: 19-Jul-2024
https://dl.acm.org/doi/10.1145/3658203
Shah IKT ANarayanan P(2023)Combining Resampled Importance and Projected Solid Angle Samplings for Many Area Light RenderingSIGGRAPH Asia 2023 Technical Communications10.1145/3610543.3626165(1-4)Online publication date: 28-Nov-2023
https://dl.acm.org/doi/10.1145/3610543.3626165
Peters CDachsbacher C(2019)Sampling Projected Spherical Caps in Real TimeProceedings of the ACM on Computer Graphics and Interactive Techniques10.1145/33202822:1(1-16)Online publication date: 3-Jun-2019
https://dl.acm.org/doi/10.1145/3320282
Fascione LHanika JPieké RVillemin RHery CGamito MEmrose LMazzone A(2018)Path tracing in productionACM SIGGRAPH 2018 Courses10.1145/3214834.3214864(1-79)Online publication date: 12-Aug-2018
https://dl.acm.org/doi/10.1145/3214834.3214864
Vévoda PKondapaneni IKřivánek J(2018)Bayesian online regression for adaptive direct illumination samplingACM Transactions on Graphics10.1145/3197517.320134037:4(1-12)Online publication date: 30-Jul-2018
https://dl.acm.org/doi/10.1145/3197517.3201340
Guillén IUreña CKing AFajardo MGeorgiev ILópez-Moreno JJarabo A(2017)Area-Preserving Parameterizations for Spherical EllipsesComputer Graphics Forum10.1111/cgf.1323436:4(179-187)Online publication date: 1-Jul-2017
https://dl.acm.org/doi/10.1111/cgf.13234

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