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ID:41188866
大小:2.05 MB
页数:10页
时间:2019-08-18
《Hardware accelerated displacement mapping for image based rendering》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、HardwareAcceleratedDisplacementMappingforImageBasedRenderingJanKautzHans-PeterSeidelMax-Planck-InstitutfürInformatikMax-Planck-InstitutfürInformatikSaarbrücken,GermanySaarbrücken,GermanyAbstractInthispaper,wepresentatechniqueforrenderingdis-placementmappedgeometryusingcurrentgraphicshar
2、d-ware.Ourmethodrendersadisplacementbyslicingthroughtheenclosingvolume.The-testisusedtorenderonlytheappropriatepartsofeveryslice.Theslicesneednottobealignedwiththebasesurface,e.g.itispossibletodoscreen-spacealignedslicing.Wethenextendthemethodtobeabletorendertheintersectionbetweensevera
3、ldisplacementmappedpoly-gons.Thisisusedtorenderanewkindofimage-basedobjectsbasedonimageswithdepth,whichwecallimagebaseddepthobjects.Thistechniquecanalsodirectlybeusedtoacceler-Figure1:Furrydonut(625polygons)usingdisplacementatetherenderingofobjectsusingtheimage-basedvisualmapping.Itwasr
4、enderedat35HzonaPIII/800usinganhull.OtherwarpingbasedIBRtechniquescanbeaccel-NVIDIAGeForce2GTS.eratedinasimilarmanner.Keywords:DisplacementMapping,ImageWarping,DisplacementmappingrecentlymadeitswayintoHardwareAcceleration,TextureMapping,Frame-Bufferhardwareacceleratedrenderingusingstand
5、ardfeatures.Tricks,Image-BasedRendering.ThebasictechniquewasintroducedbySchaufler[24]inthecontextofwarpingforlayeredimpostors.Itwasthen1IntroductionreintroducedinthecontextofdisplacementmappingbyDisplacementmappingisaneffectivetechniquetoaddDietrich[8].Thisalgorithmencodesthedisplacement
6、indetailtoapolygon-basedsurfacemodelwhilekeepingthe-channelofatexture.Itthendrawssurface-alignedthepolygoncountlow.Foreverypixelonapolygonaslicesthroughthevolumedefinedbythemaximumdis-valueisgiventhatdefinesthedisplacementofthatpartic-placement.The-testisusedtorenderonlytheappropri-ularpi
7、xelalongthenormaldirectioneffectivelyencodingatepartsofeveryslice.Occlusionsarehandledproperlyaheightfield.Sofar,displacementmappinghasmainlybythismethod.beenusedinsoftwarerendering[21,29]sincethegraph-Thisalgorithmworkswellonlyforsurface-alignedicshardwarewasnotcapableofrenderi
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