虚拟社区漫游系统的设计与实现(场景建模)摘要虚拟现实技术是由计算机产生，通过视、听、触觉等作用，使用户产生身临其境感觉的交互式视景仿真，具有多感知性、存在感、交互性和自主性等特征。虚拟现实建模言语VRML被用来描述三维物体及其行为，可以构建虚拟世界。VRML的基本目标是建立互联网上的交互式三维多媒体。VRML的出现使得虚拟现实像多媒体和互联网一样逐渐走进我们的生活。本文次要研讨基于VRML的虚拟场景建模、交互、漫游技术，根据虚拟设计及其次要特点，结合3DMAX和CosmoWorlds，对基于VRML的虚拟现实技术在人们生活领域的运用进行了研讨，侧重阐述了如何利用VRML言语以生动的模型来模拟和显示现实三维空间，毕竟以人机交互方式来实现社区三维景观的实时漫游。对建筑楼群的建模采用3DMAX三维外型工具和VRML相结合的方式，对这些模型进行优化。同时为了添加真实性，在虚拟社区中加入树木、游人、汽车等模型。这些模型共同构建全部虚拟三维场景，为市政规划建设提供一个科学简便、抽象直观的可视化人机交互平台。关键词：虚拟现实，VRML，场景建模，虚拟漫游DESIGNANDIMPLEMENTATIONFORTHEVIRTUALCOMMUNITYROAMINGSYSTEM(SCENARIOMODELING)ABSTRACTVirtualrealityisaresultofcomputerdevelopment,itmaycreatesomescenerythatincludessensesofsight,hearingandtouch.Itscharacteristicsaremulti-sensation,existentsense,interactionandindependence.VRMLcandescriptthreedimensionalobjectsandtheirbehaviors,thuscanbuildvirtualworld.BecauseoftheappearanceofVRML，VirtualRealitycomestoourlifesuchasmultimediaandInternet.Theresearchesofthispaperfocusonthemodeling,theinteractingandthebrowsingoftheVRML-basedvirtualscene.Accordingtothevirtualdesigningandthemainfeatures,unifyingthe3DMAXandCosmoWorlds,basedontheVRMLvirtualrealitytechnology,wehaveresearchedtheapplicationinthefieldofpeople'slife.ThepaperfocusesonhowtouseVRMLlanguagetoconstructinthemodelvividlytosimulateanddisplayrealisticthree-dimensionalspace.Finally,weachievedthereal-timeroamingintheThree-dimensionallandscapeofthecommunitybyhuman-computerinteraction.Wehavemodeledthesebuildingsbythecombinationof3DMAXthree—dimensionalmodelingtoolandVRML.Atthesametime,weputothermodelssuchastrees，humansandcarsintothe3dscenetointensifythesenseofthefacticity.Weusethesemodelstobuildavirtualthree-dimensionalscenetogether,toprovideascientificandsimple,intuitiveimagevisualizationplatformforconstructionofmunicipal.KEYWORDS：virtualreality，VRML，scenariomodeling，virtualtour目录TOC\o"1-3"\h\zHYPERLINK\l"_Toc327173890"前言PAGEREF_Toc327173890\h1HYPERLINK\l"_Toc327173891"第1章虚拟现实建模言语PAGEREF_Toc327173891\h3HYPERLIN