一種大型場(chǎng)景表示方法及其加速繪制技術(shù)的研究與應(yīng)用.pdf

1、Y957152糾犬碩士學(xué)位論文(2006屆)一種大型場(chǎng)景表示方法及其加速繪制技術(shù)的研究與應(yīng)用AResearchandApplicationofRepresemationMethodandFastRenderingTechniqueforLarge—scaleScene研究生姓名王敏指導(dǎo)教師姓名呂強(qiáng)(教授)專業(yè)名稱研究方向論文提交日期計(jì)算機(jī)應(yīng)用技術(shù)計(jì)算機(jī)圖形學(xué)2006年4月Abs&rantA∞RedseFaarscthRaennddeAr

2、pipngIiTcaetchionniqoufeRfe。prreLaserngtea—tscioanIeilestcheonedAResearchandApplicationofRepresentationMethodandFastRenderingTechniqueforLarge—scaleSceneAbstractWiththeapplicationofVirtualRealityandVisualizationitisveryn

3、ecessarytobuildthousandsofcompticatedandreal3Dmodelinavirtualscenewhichcontainsunexpectedlylarge3DsceneItisverydifficultforala。gescalecomplexscenetobuildthe3Dmodel，managethedataofthe3Dmodelandrealtimeinteractandwalkthrou

4、ghinthesceneTherefore，twopivotalproblemsmustbesolvedinthedevelopingprocessofalargescalescene’swalkthroughsystem：howtepresentalargescalescene，andhowtealizereal—timeinteractingandwalkthroughinalargescalesceneAndthereisnogo

5、odmethodtosolvingthetwoproblemsatpresentThispaperaddressestherepresentationsandfastrenderingtechniquesforlargescalescenefurtherBasedontheresearchofconvectingmethodof3Dmodel，thispaperproposesanewtransplantingmethodofpolyg

6、onmodelmadebyMaya：developingaMayaexporterplugin，thenextractingthedataofsome3DmodelsfromMayaenvironmentsecondlyandorganizingandsavingthesedataaccordingteal—timerequirementConsequentlythispaperdesignsaM3Ddatamodelwithstand

7、ardized，optimizedandpossessedspatialdatastructuresBeingappliedtothelarge3Dvirtualscenedevelopment，thisdatamodelconducesnotonlytofastbuildingthousandsofcomplicatedandreal3Dmodelsina3Dscenewalkthroughsystem，butalsoteal—tim

8、erenderingfine3DmodelsBasedonthereseaZchofthehorizontalandthevisualcharacteristics，thispaperproposesaselLadaptivecontributionindex口basedontime，spaceandilluminance，Asaresultoftakingadvantageofp，thispaperimplementsOcclusio

9、nCullingbasedPartofDetailHorizon(PODHOC)algorithminordertospeeduptherenderingoflargescale3DscenewiththesupportofM3DmodelFinallybasedonM3DdatamodelandPODHOCLODfastrenderingalgorithmalargescalescenewalk—throughsystemprotot