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ID:39730006
大小:1.41 MB
页数:8页
时间:2019-07-10
《Real-time Terrain Rendering using Smooth Hardware Optimized Level of detail》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、Real-timeTerrainRenderingusingSmoothHardwareOptimizedLevelofDetailBentDalgaardLarsenNielsJørgenChristensenTechnicalUniversityofDenmarkABSTRACTWepresentamethodforreal-timelevelofdetailreductionthatisabletodisplayhigh-complexitypolygonalsurfacedata.Aco
2、mpactandefcientregulargridrepresentationisused.Themethodisoptimizedformodern,low-endconsumer3Dgraphicscards.Weavoidsuddenchangesofthegeometry-alsoknownas'popping',whenreducingthegeometrybyexploitingthelow-levelhardwareprogrammabilityinordertomaintai
3、ninteractiveframerates.Terrainmodelsarerepolygonizedinordertominimizingthevisibleerror.Furthermore,themethodminimizesCPUusageduringrenderingandrequiresminimalpre-processing.Webelievethatthisisthersttimethatasmoothlevelofdetailhasbeenimplementedincom
4、modityhardware.Keywords:terrain,viewingalgorithms,frame-to-framecoherence,multiresolutionmodelling,continuouslevelofdetail1Introductionwithdifferentlevelofdetail(LOD)algorithmsandag-gressivefrustumculling.ThemainfocushasbeentoHeighteldterrainrenderi
5、ngandeditingisanimpor-minimizethetotalnumberofpolygonsdisplayedonthetantaspectofGIS,outdoorvirtualrealityapplicationsscreenatanypointintime.Famousmethodsforter-suchasightsimulatorsand3D-games.SuchscenesrainrenderingaretheROAMmethod[Duchaineau97]mayc
6、ontainthousandsofpolygonsandalthoughmod-andthelevelofdetailalgorithmintroducedbyLind-erngraphicscardsallowthedisplayofmanythousandsstrometal.atSIGGRAPH'96[Lindstrom96].Thisofpolygonsatreal-timeframerates,manyapplicationsmethodoperatesonaregularlyspac
7、edheight-mapandhavemodelswithgeometriccomplexitiesthat,byfar,mergestrianglesbasedonthevisibleerrorinscreen-exceedthereal-timecapabilities.Inthefuture,graphicsspace.ThemethodcleverlyavoidsT-meshesandcrackscardswillbeabletodisplaymoreandmorepolygonsint
8、hesurfacebypropagatingtrianglesplitsandmergespersecond,butontheotherhandthedemandforus-intheheight-map.In[Rottger98¨]themethodorigi-ingmorecomplexmodelswillalsorise,andthisgapnallydevelopedin[Lindstrom96]wasextendedwithabetweentheperformanceofgraphic
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