inria-00087776, version 2

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BibTeX  EndNote  TEI  RefWorks %% inria-00087776, version 2 %% http://hal.inria.fr/inria-00087776/en/ @techreport{BOUATOUCH:2006:INRIA-00087776:2, title = { {R}endering {G}rass in {R}eal {T}ime with {D}ynamic {L}ight {S}ources}, author = {{B}ouatouch, {K}adi and {B}oulanger, {K}{\'e}vin and {P}attanaik, {S}umanta}, abstract = {{S}ince grass is very abundant on the {E}arth's surface, it is an important element of natural 3{D} scenes. {R}eal-time realistic rendering of grass has always been difficult due to the huge number of grass blades. {O}vercoming this geometric complexity usually requires many coarse approximations to provide interactive frame rates. {H}owever, the performance comes at the cost of poor lighting quality and lack of detail of the grass. {I}n this report, we describe a grass rendering technique that allows better lighting and parallax effect while maintaining real-time performance. {W}e use a novel combination of geometry and lit volume slices, composed of {B}idirectional {T}exture {F}unctions ({{BTF}}s). {{BTF}}s, generated using a fast pre-computation step, provide an accurate, per pixel lighting of the grass. {O}ur implementation allows the rendering of a football field, covered by approximately $627$ million virtual grass blades, with dynamic lighting, shadows and anti-aliasing in real-time. {T}he creation of arbitrary shaped patches of grass is made possible using our density management.}, keywords = {grass rendering, real-time, lighting, shadows, levels of detail, density, volume rendering, {{BTF}}, anti-aliasing}, language = {{A}nglais}, affiliation = {{SIAMES} - {INRIA} - {IRISA} - {CNRS} : {UMR}6074 - {INRIA} - {I}nstitut {N}ational des {S}ciences {A}ppliqu{\'e}es de {R}ennes - {U}niversit{\'e} de {R}ennes 1 - {G}raphics {L}ab - {GRAPHICS} {LAB} - {U}niversity of {C}entral {F}lorida }, pages = {36 }, type = {Research Report}, institution = {INRIA}, number = {{RR}-5960}, year = {2006}, URL = {http://hal.inria.fr/inria-00087776/en/}, URL = {http://hal.inria.fr/inria-00087776/PDF/RR-5960.pdf}, } %F inria-00087776, version 2 %0 Report %U http://hal.inria.fr/inria-00087776/en/ %2 INFO:INFO_OH %T Rendering Grass in Real Time with Dynamic Light Sources %A Bouatouch, Kadi %A Boulanger, Kévin %A Pattanaik, Sumanta %A Bouatouch, K. %A Boulanger, K. %A Pattanaik, S. %A Bouatouch K. et al %+ SIAMES - INRIA - IRISA - CNRS : UMR6074 - INRIA - Institut National des Sciences Appliquées de Rennes - Université de Rennes 1 - Graphics Lab - GRAPHICS LAB - University of Central Florida %X Since grass is very abundant on the Earth's surface, it is an important element of natural 3D scenes. Real-time realistic rendering of grass has always been difficult due to the huge number of grass blades. Overcoming this geometric complexity usually requires many coarse approximations to provide interactive frame rates. However, the performance comes at the cost of poor lighting quality and lack of detail of the grass. In this report, we describe a grass rendering technique that allows better lighting and parallax effect while maintaining real-time performance. We use a novel combination of geometry and lit volume slices, composed of Bidirectional Texture Functions ({BTF}s). {BTF}s, generated using a fast pre-computation step, provide an accurate, per pixel lighting of the grass. Our implementation allows the rendering of a football field, covered by approximately $627$ million virtual grass blades, with dynamic lighting, shadows and anti-aliasing in real-time. The creation of arbitrary shaped patches of grass is made possible using our density management. %2 J.: Computer Applications/J.6: COMPUTER-AIDED ENGINEERING/J.6.0: Computer-aided design (CAD) %Z Computer graphics %G Anglais %2 Rapport de recherche %P 36 %8 2006 %K grass rendering, real-time, lighting, shadows, levels of detail, density, volume rendering, {BTF}, anti-aliasing %2 2006 %2 RR-5960 <?xml version="1.0" encoding="UTF-8"?> <listBibl xmlns="http://www.tei-c.org/ns/1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML"> <listBibl type="report"><head>Rapports</head> <biblStruct type="report" xml:id="inria-00087776"><monogr> <author><persName><forename>Kadi</forename><surname>Bouatouch</surname></persName> <affiliation> <orgName type="laboratory">INRIA - IRISA</orgName> <orgName type="team">SIAMES</orgName> <country>FR</country> <orgName type="institution">CNRS : UMR6074</orgName> <orgName type="institution">INRIA</orgName> <orgName type="institution">Institut National des Sciences Appliquées de Rennes</orgName> <orgName type="institution">Université de Rennes 1</orgName> </affiliation> </author> <author><persName><forename>Kévin</forename><surname>Boulanger</surname></persName> <affiliation> <orgName type="laboratory">INRIA - IRISA</orgName> <orgName type="team">SIAMES</orgName> <country>FR</country> <orgName type="institution">CNRS : UMR6074</orgName> <orgName type="institution">INRIA</orgName> <orgName type="institution">Institut National des Sciences Appliquées de Rennes</orgName> <orgName type="institution">Université de Rennes 1</orgName> </affiliation> </author> <author><persName><forename>Sumanta</forename><surname>Pattanaik</surname></persName> <affiliation> <orgName type="laboratory">GRAPHICS LAB</orgName> <orgName type="team">Graphics Lab</orgName> <country>US</country> <orgName type="institution">University of Central Florida</orgName> </affiliation> </author> <title type="main" level="m">Rendering Grass in Real Time with Dynamic Light Sources</title><title type="main" level="m">Rendering Grass in Real Time with Dynamic Light Sources</title><imprint><biblScope type="publicationDate">2006</biblScope><biblScope type="pp">36</biblScope></imprint></monogr><idno type="HALid">http://hal.inria.fr/inria-00087776/en/</idno><idno type="HALFile">http://hal.inria.fr/inria-00087776/PDF/RR-5960.pdf</idno></biblStruct> </listBibl> </listBibl>

Rendering Grass in Real Time with Dynamic Light Sources Kadi Bouatouch (, ) a, 1, Kévin Boulanger 1, Sumanta Pattanaik () b, 2 (2006)

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Résumé : Since grass is very abundant on the Earth's surface, it is an important element of natural 3D scenes. Real-time realistic rendering of grass has always been difficult due to the huge number of grass blades. Overcoming this geometric complexity usually requires many coarse approximations to provide interactive frame rates. However, the performance comes at the cost of poor lighting quality and lack of detail of the grass. In this report, we describe a grass rendering technique that allows better lighting and parallax effect while maintaining real-time performance. We use a novel combination of geometry and lit volume slices, composed of Bidirectional Texture Functions ({BTF}s). {BTF}s, generated using a fast pre-computation step, provide an accurate, per pixel lighting of the grass. Our implementation allows the rendering of a football field, covered by approximately $627$ million virtual grass blades, with dynamic lighting, shadows and anti-aliasing in real-time. The creation of arbitrary shaped patches of grass is made possible using our density management.

a –	Université Rennes I
b –	University of Central Florida
1 :	SIAMES (INRIA - IRISA)
	CNRS : UMR6074 – INRIA – Institut National des Sciences Appliquées de Rennes – Université de Rennes 1
2 :	Graphics Lab (GRAPHICS LAB)
	University of Central Florida

Domaine

:

Informatique/Autre

Mots-clés : grass rendering – real-time – lighting – shadows – levels of detail – density – volume rendering – {BTF} – anti-aliasing

Référence interne : RR-5960

Versions disponibles :

v1 (26-07-2006)

v2 (02-08-2006)

inria-00087776, version 2

http://hal.inria.fr/inria-00087776/fr/

oai:hal.inria.fr:inria-00087776_v2

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Soumis le : Mercredi 2 Août 2006, 10:49:17

Dernière modification le : Jeudi 25 Janvier 2007, 14:50:22