Comparison of Modern Omnidirectional Precise Shadowing Techniques Versus Ray Tracing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26230%2F22%3APU147290" target="_blank" >RIV/00216305:26230/22:PU147290 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/cgf.14425" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/cgf.14425</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/cgf.14425" target="_blank" >10.1111/cgf.14425</a>

Result language

angličtina

Original language name

Comparison of Modern Omnidirectional Precise Shadowing Techniques Versus Ray Tracing

Original language description

This paper presents an in depth comparison of state-of-the-art precise shadowing techniques for an omnidirectional point light. We chose several types of modern shadowing algorithms, starting from stencil shadow volumes, methods using traversal of acceleration structures to hardware-accelerated ray-traced shadows. Some methods were further improved - robustness, increased performance; we also provide the first multi-platform implementations of some of the tested algorithms. All the methods are evaluated on several test scenes in different resolutions and on two hardware platforms - with and without dedicated hardware units for ray tracing. We conclude our findings based on speed and memory consumption. Ray-tracing is the fastest and one of the easiest methods to implement with small memory footprint. The Omnidirectional Frustum-Traced Shadows method has a predictable memory footprint and is the second fastest algorithm tested. Our stencil shadow volumes are faster than some newer algorithms. Per-Triangle Shadow Volumes and Clustered Per-Triangle Shadow Volumes are difficult to implement and require the most memory; the latter method scales well with the scene complexity and resolution. Deep Partitioned Shadow Volumes does not excel in any of the measured parameters and is suitable for smaller scenes. The source codes of the testing framework have been made publicly available.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

COMPUTER GRAPHICS FORUM

ISSN

0167-7055

e-ISSN

1467-8659

Volume of the periodical

41

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

106-121

UT code for WoS article

000725980900001

EID of the result in the Scopus database

2-s2.0-85120437392