modelingofsinglearchitecture.Therefore,infinemodelingofcomplexancientarchitectures,thebestwayistomodelsinglearchitectureinDsMaxfirstly,thenimportittoMultiGenCreatorforsimplification,andusekeytechnologiessuchasLOD,tosatisfythedatademandofreal-timerendering..ModelingprocessesusingDsMaxandMultiGenCreatorIntheactualconstructionprocessofancientarchitecture,thecomponentsaredividedintothefollowingfivelevThemostsignificantcharacteristicofancientChinesearchitecturemakefulluseoftimberframework.Woodenposts,beams,lintelsandjoistsmakeuptheframeworkofahouse.Wallsserveastheseparationofroomswithoutbearingtheweightofthewholehouse,whichisuniquetoChina.Asafamoussayinggoes,'Chinesehouseswillstillstandwhentheirwallscollapse.'Thespecialtyofwoodrequiresantisepsismethodstobeadopted,thusdevelopsintoChineseownarchitecturalpaintingdecoration.()Coloredglazeroofs,windowswithexquisiteappliquedesignandbeautifulflowerpatternsonwoodenpillarsreflectthehigh-levelofthecraftsmen'shandicraftandtheirrichimagination.()Thelayoutofacourtyardcomplexisalsouniquetochina.Themainstructureislocatedonthecentralaxisofacourtwhileless-importantstructuresarelocatedtotheleftandright.Thewholelayoutissymmetrical..ComparisonofDsMaxandMultiGenCreatorInmodelingofsinglecomplexarchitecture,finenessandfidelity,DsMaxhasmoreadvantagesmoreMultiGenCreator.DsMaxprovidesthepolygon--modeling,lofting,facemodeling,NURBSfacemodeling,andotherconvenientandeffectivemodelingmethod.Ithasabetterabilityofspecialeffectprocessingandrendering.UsingDsMaxyoucandeterminepreciselythesizeandthepositionofthemodel.Aftermodeling,youcanmodifyeachcomponentaccordingtotheactualneedatanymoment.AlthoughDsMaxdescribestheobjects'detailsvividly,thelargeamountofthedataofmodelingcannotmeettheneedofreal-timerendering.ComparedwithDsMax,MultiGenCreatorhaslessamountofmodelingdata.MultiGenCreatorhasthereal-timefunctionsofpolygonculling、logicculling、prioritydrawing、binaryseparatingplaneandsoon.OpenFlightisthedatabaseformatofCreator.Ituseshierarchicalstructureofnodestodescribethedatabase,soastoinformtheimagegeneratorwhenandhowtorenderreal-timeDscenes.AlthoughCreatorgeneratesfileonthesmallvolumedata,andhasarapidrenderingspeed,itcannotbecomparabletoDsMaxinfinemodelingofsinglearchitecture.Therefore,infinemodelingofcomplexancientarchitectures,thebestwayistomodelsinglearchitectureinDsMaxfirstly,thenimportittoMultiGenCreatorforsimplification,andusekeytechnologiessuchasLOD,tosatisfythedatademandofreal-timerendering..ModelingprocessesusingDsMaxandMultiGenCreatorIntheactualconstructionprocessofancientarchitecture,thecomponentsaredividedintothefollowingfivelev，对大雄宝殿建模应该按照从下到上、从局部到整体、从粗到细次序。具体步骤如下：()从AutoCAD中导出所需建筑现状图，然后将提取出局部图保存为新DWG文件。这样做法是为了避免因导入如此大DWG文件而引起计算机运行效率降低甚至电脑僵局。()在DsMax中选择“导入”选项，导入保存DWG文件。由于导入工作草图中包含高度值，不方便观察，所以我们需要在顶视图中压缩Z轴高度为。()使用刚导入数据，在DsMax中创建D模型。由于独特结构特征，建模必须按照一定顺序：首先是柱座，因为柱座是上面总量支撑而且是整个建筑基础；其次是柱子、墙体梁框架；最后是屋顶。在大雄宝殿主要构架建模完成后，就该是大殿局部位置建模了，如门窗、栏杆、窗台等等。()对D模型进行材质贴图。在想要表现栩栩如生建筑效果时，对材质选择是很重要。高分辨率贴图能产生逼真视觉效果,但同时也增加了现场示范负担。使用恰当分辨率材质和材料可以降低几何模型细节,同时产生更加良好视觉效果。在建模过程中完成后,由高分辨率数码相机在现场拍出经过处理照片,然后保存照片以用作合适大小材质贴图。在DsMax中选择合适贴图方式与坐标来对建筑每个组件进行贴图，例如：使用修改器中UVW贴图命令以调整贴图。图显示完成大殿D模型。图大雄宝殿D模型.导入Creator简化模型将模型从DsMax中导入Creator中进行模型简化需要三个步骤：()导入模型。将D模型从DsMax中导入Creator中，然后贴图通道会丢失，你需要建立一个新贴图通道。后者路径应该是一个与模型路径相关路径，这样会增加模型路径适应性。()组织数据库结构。Ds文件数据库没有层次结构，所有对象都被置于同一父节点下。所以我们应该重组数据库是根据古代建筑模型不同部分主次。这不仅可以促进在建模过程中模型选择操作,而且提高了图形渲染速度并避免场景渲染和浏览中一些绘图错误。()简化模型。即在不影响模型表现前提下，用较少数据表现模型并消除冗余数据。导出Ds文件保存面是三角形组成，而保存面是多角形组成。为了简化，--可以用Creator中结合面工具将共面三角形合并到一个多角形面上。这样可以大大地减少多边形数量。此外，应用实例可以简化模型。通常情况下，古代建筑模型包括很多相同组件，如：标杆，梁等等。在建模过程中，你可以使用实例技术，复制组件到其他位置。以至于数据库不会重复地创建同一类型节点。这可以极大节省内存空间。最后，一些看不见面可以直接删除，如模型底部和相邻组件之间相邻面。.创建LOD模型LOD（LevelOfDetails）是一个模型管理方法用不同细节来节约对象。在场景中，根据需要绘制场景，同样场景或对象可以访问不同细节层次。较高LOD模型详细程度是,模型越好,数据量越大；较低细节程度是，场景或模型越简单，数据量越小。一般地，低细节程度模型应用在远程观察。这不会影响到第三维度；当近距离观察模型,应采用高细节程度，你可以看到一个非常好模型。有很多建立LOD模型方法。在论文中，我们使用两种方法，删除方法与截取图片方法。删除方法是删除模型部分细节和保存主要部分，适用于建筑装修层次架构。但该方法缺点是难以将模型数据量最小化。截取图片方法可以简化模式中需要显示面，比如建筑窗户，它们结构很复杂，就可以采用截取图像方法。截取图片方法使用捕捉屏幕方式截取图像，然后处理作为材质，最后将其贴到整个面上来表现模型这个面。较低级LOD模型完成面不能超过较高级LOD模型完成面三分之一。图显示了使用删除方法和截图方法LOD模型三个级。一级LOD模型二级LOD模型--三级LOD模型图LOD模型三个级图所示一级LOD模型有个面。但是图所示模型却有个面。很明显，数据量在很大程度上下降了，但去没有明显视觉差异。表三级LOD模型精度比较表从表数据中可以看出，通过删除方法和截图方法创建三级LOD模型可以邮箱减少面数量。它为南普陀寺虚拟漫游系统完成奠定了基础。、结论本文在相当程度上简化了DsMax中模型海量数据，通过使用MutliGenCreator中强大三维数据组织功能、实例、多层次细节建模等方面关键技术，所以它满足实时渲染需求。此项技术很大程度上减少了数据量,并且在工程上拥有良好表现效果。与此同时，证明了DsMax与MutliGenCreator在古建筑D重修方面集成可行性和实用性。ThemostsignificantcharacteristicofancientChinesearchitecturemakefulluseoftimberframework.Woodenposts,beams,lintelsandjoistsmakeuptheframeworkofahouse.Wallsserveastheseparationofroomswithoutbearingtheweightofthewholehouse,whichisuniquetoChina.Asafamoussayinggoes,'Chinesehouseswillstillstandwhentheirwallscollapse.'Thespecialtyofwoodrequiresantisepsismethodstobeadopted,thusdevelopsintoChineseownarchi--附录AResearchonMethodofDReconstructionofAncientArchitecture(NanputuoTemple)[]AbstractInthispaper,regardingtheGreatMajestyHalloftheNanPutuoTempleasavirtualmodelingobject,theresearchonthenewtechnologyofDreconstructionoftheancientarchitecturehasbeendone,inwhichDsMaxandMultiGenCreatorwereapplied.TheconflictwassolvedbetweenprecisionandtheamountofdataexistingintheprocessofDmodelingvirtualancientarchitecture.Thepracticalprojecthasprovedthattheancientarchitecturemodelmadeinthiswayhasgottenlivingeffectinroamingsystem,atthemeantimeitsatisfiesthedatademandofreal-timerendering.Keyword：Virtualreality(VR),AncientArchitectureProtection,DsMax,MultiGenCreator.IntroductionVirtualRealityisanewman-machineinterface.Itprovidesusers(participants)withsatisfactoryimmersedexperienceandmulti-sensorychannels,andattemptstoseekthebestwayofman-machinecommunication.Usingthevirtualrealitytechnologytorealizetherepresentationofancientarchitectureistheinnovationofarchitecturalillustrationaltools,anditisoneofthehottopicsofthepresentresearch.ThelifelikecomputermodelingcannotonlydemonstratetheprofoundculturaldetailsofChineseancientarchitectures,buthavepracticalsignificancetotheprotectionofancientarchitecturesinformofarchives,thereforeitwasappliedmorewidelythanthetraditionalphysicalmodel.Themodelingfidelityandrapidreal-timedatarenderingarethefoundationsof--realizingvirtualrealitydesktopsystem.Theproject"XiamenNanputuoTemplevirtualroamingsystem"requiredthatvirtualscenescouldreachabalancebetweenthequalityimageandthespeedoftherendering,andprescribedstrictlythedegreeofaccuracyanddetailofeveryarchitecture.Itcontrolledtheamountofdataaspossibleaswecanonthebasisoffinemodeling.RegardingtheGreatMajestyHalloftheNanPutuoTempleasvirtualmodelingobject,usingthemodelingmethodofDsMaxandMultiGenCreator,thepapercarriedonbeneficialdiscussiontotheapplicationofthetechnologyingeometrymodelingofancientarchitectures..Chineseancientarchitectures’featuresInthispaper,thevirtualmodelingobjectoftheGreatMajestyHallbelongtoimitationQing-Dynastyancientarchitectures.ItfollowedtheancientChinesearchitecturemajorcharacteristicsgenerallysummarizedasfollows:()ThemostsignificantcharacteristicofancientChinesearchitecturemakefulluseoftimberframework.Woodenposts,beams,lintelsandjoistsmakeuptheframeworkofahouse.Wallsserveastheseparationofroomswithoutbearingtheweightofthewholehouse,whichisuniquetoChina.Asafamoussayinggoes,'Chinesehouseswillstillstandwhentheirwallscollapse.'Thespecialtyofwoodrequiresantisepsismethodstobeadopted,thusdevelopsintoChineseownarchitecturalpaintingdecoration.()Coloredglazeroofs,windowswithexquisiteappliquedesignandbeautifulflowerpatternsonwoodenpillarsreflectthehigh-levelofthecraftsmen'shandicraftandtheirrichimagination.()Thelayoutofacourtyardcomplexisalsouniquetochina.Themainstructureislocatedonthecentralaxisofacourtwhileless-importantstructuresarelocatedtotheleftandright.Thewholelayoutissymmetrical..ComparisonofDsMaxandMultiGenCreatorInmodelingofsinglecomplexarchitecture,finenessandfidelity,DsMaxhasmoreadvantagesmoreMultiGenCreator.DsMaxprovidesthepolygon--modeling,lofting,facemodeling,NURBSfacemodeling,andotherconvenientandeffectivemodelingmethod.Ithasabetterabilityofspecialeffectprocessingandrendering.UsingDsMaxyoucandeterminepreciselythesizeandthepositionofthemodel.Aftermodeling,youcanmodifyeachcomponentaccordingtotheactualneedatanymoment.AlthoughDsMaxdescribestheobjects'detailsvividly,thelargeamountofthedataofmodelingcannotmeettheneedofreal-timerendering.ComparedwithDsMax,MultiGenCreatorhaslessamountofmodelingdata.MultiGenCreatorhasthereal-timefunctionsofpolygonculling、logicculling、prioritydrawing、binaryseparatingplaneandsoon.OpenFlightisthedatabaseformatofCreator.        -1-附录AResearchonMethodof3DReconstructionofAncientArchitecture(NanputuoTemple)[10]AbstractInthispaper,regardingtheGreatMajestyHalloftheNanPutuoTempleasavirtualmodelingobject,theresearchonthenewtechnologyof3Dreconstructionoftheancientarchitecturehasbeendone,inwhich3DsMaxandMultiGenCreatorwereapplied.Theconflictwassolvedbetweenprecisionandtheamountofdat

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