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1、大連海事大學(xué)碩士學(xué)位論文大規(guī)模地形場(chǎng)景實(shí)時(shí)繪制技術(shù)研究姓名:翟小明申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):交通信息工程及控制指導(dǎo)教師:任鴻翔20100601中文摘要摘要大規(guī)模三維場(chǎng)景的可視化在虛擬現(xiàn)實(shí)、地理信息系統(tǒng)、戰(zhàn)場(chǎng)仿真等領(lǐng)域有著廣泛的應(yīng)用,作為其中必不可少的一部分,大規(guī)模地形場(chǎng)景的實(shí)時(shí)繪制已經(jīng)成為國(guó)內(nèi)外學(xué)者研究的熱點(diǎn)之一。本文為滿(mǎn)足海上搜救模擬器直升機(jī)單元的視景系統(tǒng)需求,對(duì)大規(guī)模地形場(chǎng)景的實(shí)時(shí)繪制技術(shù)進(jìn)行了研究,所做的主要工作如下:1.研究大規(guī)模地形場(chǎng)景實(shí)時(shí)繪制的關(guān)鍵技術(shù)。大規(guī)模地形場(chǎng)景在繪制時(shí),通常需要對(duì)數(shù)據(jù)進(jìn)行適當(dāng)?shù)奶幚?,以滿(mǎn)足實(shí)時(shí)性的要求。本文重點(diǎn)
2、研究了地形數(shù)據(jù)的分塊、裁剪、調(diào)度方法以及紋理數(shù)據(jù)處理相關(guān)的理論和場(chǎng)景模型中裂縫的消除。2.大規(guī)模地形場(chǎng)景模型構(gòu)建過(guò)程。大規(guī)模地形場(chǎng)景模型的構(gòu)建需要解決海量的地形數(shù)據(jù)和逼真的紋理數(shù)據(jù)來(lái)源問(wèn)題,本文綜合考慮海上模擬器中直升機(jī)單元視點(diǎn)較高,對(duì)地形場(chǎng)景的幾何細(xì)節(jié)要求相對(duì)較低的情況,采用GoogleEarth的高程數(shù)據(jù)和高清遙感圖片作為構(gòu)建場(chǎng)景的數(shù)據(jù)源,并利用ArcScene構(gòu)建了地形場(chǎng)景模型。3.利用OpenSceneCn'aph三維渲染引擎實(shí)現(xiàn)了大規(guī)模地形場(chǎng)景的實(shí)時(shí)繪制。本文所做工作為日后進(jìn)一步完善海上搜救模擬器直升機(jī)單元的視景系統(tǒng)打下了一定的基礎(chǔ)。
3、關(guān)鍵詞:大規(guī)模地形場(chǎng)景;實(shí)時(shí)繪制;LOD;OSG;建模英文摘要ABSTRACT111ethree-dimensionvisualizationtechnologyforlarge-scaleenvironmenthasbeenbroadlyappliedtoVR,GIS.militarysimulation,etc.Thereal-timerenderingoflarge-scaleterrainenvironment,asanessentialpartofit,isnowahotresearchtopicwidelyconcernedbysc
4、holarsfromhomeandabroad.Inordertomeettherequirementsofhelicopterunitvisualsystemofmarinesearchandrescuesimulator,thispaperresearchesOilthereal·timerenderingtechnologyoflarge—scaleterrainenvironment.Themainworkcanbesummarizedasfollows:1.Thekeytechnologyofthereal-timerendering
5、oflarge-scaleterrainenvironment.Thedatashouldbeproperlyhandledwhenthelarge-scaleterrainenvironmentisbeenrendered,itisofgreatnecessitytomeettherequirementofreal-timerendering.nlispaperfocusesontheblocking,culling,andreviewstherelativetheoryontexturedatahandlingandsplitelimina
6、tionofscenemodel.2.Theprocesstobuildthemodeloflarge-scaleterrainenvironment.Tosolvethesourogproblemofmassterrainandlifeliketexturedata,theelevationdataandimagesofGoogleEarthareputforwardandArcSccneisappliedtobuildtheterrainscenemodel,勰theviewingpointishighinthehelicopterunit
7、ofmaritimesimulatorandthegeometricrequirementofterrainsceneisrelativelylow.3.Realizationofthereal—timerenderingoflarge-scaleterrainscenebyOSG.Inthispaper,tosomeextent,theworklaysafoundationtoimprovehelicoptervisualsystemofmaritimesearchingsimulatorinthenextstep.KeyWords:Larg
8、e-ScaleTerramEnvironment;Real-TimeRendering:LOD:OSG;Modeling大連海事大學(xué)學(xué)位論文原創(chuàng)性聲明