虚拟现实技术虚拟校园中英文对照外文翻译文献.docx
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虚拟现实技术虚拟校园中英文对照外文翻译文献.docx
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虚拟现实技术虚拟校园中英文对照外文翻译文献
中英文资料对照外文翻译
(文档含英文原文和中文翻译)
外文原文
VirtualizingaCampus:
ASEEUCaseStudy
ABSTRACT
Creatingapresentationforthewebthatdrasticallydiffersfromstandardonesisstillachallengeandrepresentsamilestoneformanyresearchgroups.Virtualuniversitycampusestogetherwithvirtuallearningrepresentoneofthesechallenges,becauseitfusesin-placelearningwithVirtualLearningoreducation.
InthispaperwepresenttheinhousedevelopmentoftheVirtualCampusforSouthEastEuropeanUniversity,thedesignmethodologies,implementationexperience,resultsandpossibilities.
Keywords
VirtualCampus,VirtualEducation,3-DModeling
1.INTRODUCTION
VirtualWorldsareenvironmentsthattendtolooklikethephysicalworldandtheycreateasenseofaplacewhereausercancommunicate,navigate,anddovariousthingsaccordingtoitsnavigationpreferences.Virtualworldshavetraditionallybeendevelopedasgames,butlatelyasvirtualcampuses,museumsorlibraries.Thevirtualcampusisaneducationalcommunitythatfocusesonincreasingstudentaccesstoqualityservices.ASEEUvirtualcampushasbeendevelopedintheComputerScienceandTechnologiesDepartmentattheSEEUanditisbasedontheconceptofvirtualworlds.Fewuniversities[5]offera3-DModelingofphysicalfacilities.Insteadmostofthemaresimplewebsites,offeringinformationandservicesintraditionalway(virtualeducation)[2,4,9].Enrichingthewebwithgraphicpossibilitiesratherthanusingthetraditionalapproach,hasbeenthemilestonesincefromitsverybeginning.Craftingawebthatwillbeabletopresent3-Dmodelsindifferentwaysisstillachallenge.Thenewtrendsin3-Modelingandweb,emergedwithnewconceptsandtechnologiesconcerningofferingbetterservicestocustomers.Thisnewtrenddidnotoverpassuniversitiesaswell.Educatorsandstudentsfromvariousresearchareasruntoexplore,presentandcollaboratetheirideasin3D.
Inthispaperwepresentadesignmethodologyandimplementationofavirtualcampusthatallowsstudentstovirtuallymovearoundthe3-Dimensionalworld,aswellasinteractwithit.TheobjectivesoftheSEEUVirtualCampusactuallyaimtocontributetothemodernizationagendaofuniversities,tryingtogiverelativelynewapproachbyputtingusersinavirtual3-Denvironmentandtryingtoprovidehimwiththenecessaryinformation.Approachesnotfoundin[2,4,9].OtherapproacheslikeSecondlife[8]useacompletenewinfrastructureanddifferentprotocols(secondlifeprotocol)thatmakesitimpossibleforusagebyordinarywebuserswithoutinstallingnewsoftwareandprotocolsthatsecondlifedemands.
ThemaingoaloftheSEEUvirtualcampusistocreatea3-Dvirtualworldbasedonanexistentinfrastructureandprotocolsthatwebprovides,makingitthiswaymoreusableandaccessible.TheclientthatSEEUVirtualcampususesislightweight,easytoinstallandbuiltuponexistentwebprotocols(http).
Therestofthispaperisorganizedasfollows:
Insection1,abriefintroductionandmaingoalofvirtualcampusispresented.InSection2,Insection3,theexperienceoftheprojectteamduringimplementationispresented.Section4presentstheresultsandoutcomesoftheVirtualCampuswithseveralpossibilitiesanddirectionsforenrichingitwithnewfeaturesandsection5concludesthispaper.
2.DESIGNMETHODOLOGY
Wegenerallyunderstandvirtualworldsasacollectionofdigitalmediaunits.Peoplearefamiliarwithhypertext,digitalimages,digitalaudioandvideo,and3Dmodelingaspresentationtools.Thedesignmaterialsofvirtualarchitectureemergeandtakeeffectduringdifferentdesignprocesses[1].ThestagesofthedesignofourVirtualCampusaregroupedintothreecategories:
metaphoricaldesign,analogicaldesign,andimplementation.
MetaphoricalDesign:
Throughtheuseofmetaphor,weexpresstheconceptsinonedomainintermsofanotherdomain.Untilnow,knownmetaphorsare:
GiantBrain,InformationSuperhighwayandMultipleMetaphors[1].DesigningaVirtualCampusfallsinthegroupofMultipleMetaphorstogetherwithDigitalLibrary,ElectronicMailandElectronicMarketplace.Usingthismetaphor,allofthesesubgroupsallowsuserstointeractwiththevirtualenvironment.
AnalogicalDesign:
Itdealswithusingthecurrentdesigninordertocreatenewinsightsandpossibilitiesforfurtherenhancementsandadaptationforanewdesign[1].Inthisstage,thephysicalarchitectureofSEEUhasbeenadoptedtosatisfytheneedsofvirtualarchitecture.Firststepwasprovidingthe2-DmapoftheUniversityuponwhichthe3-Dmodelwillbebuilt.Secondstepofthisstagewasincorporatingthemapintoourchosensoftware.
Implementation:
ThesoftwaresolutionwasdevelopedusingGoogleSketchUp[3]anddifferentdesignmaterialslistedbelow.
2.1DesignMaterials
Thetypesofdigitalmediarelevanttovirtualarchitectureinclude:
text,digitalimages,framedbasedanimation,3DModeling[7].
Text:
usingtextisveryimportantbecauseitaffectstheusersofthevirtualworld.AtourUniversity,officiallanguagesareAlbanian,MacedonianandEnglish;forthatreasonallusedtextsarewritteninthethreelanguagesmentionedabove.
DigitalImages:
Herewerefertodigitalimagesasrasterorbitmappedimages,representedincomputermemoryasanarrayofdiscretebitsofinformationwhereeachbitspecifiescolorandintensity[6].DigitalimagesareusedtorepresenttheenvironmentoutoftheCampusinordertogiveamorereallooktotheVirtualonethatwehavedesigned.
Framed-basedanimation:
Ananimatedpictureisasequenceofimagesthataredisplayedinafixedorder.Theframesmaybeproducedbysamplingwithamovieorvideocamera[12].AmoviefileoftheVirtualCampushasbeencreatedwhichisusedindifferentpresentationsheldinourUniversity.
3DModeling:
3Dmodelsarethebasicresourcesforproducing3Danimation.Iftheframesofananimatedpicturearecapturedbygeneratingasequenceofprojectedandrenderedviewsfroma3Dmodel,thenitwillproduce3Danimation.Therefore,3Danimationisthepostproductionof3Dmodels.Different3Danimationresultscanbeachievedbasedonasame3Dmodelbychanginganimationmethodsorcameraviewsandpaths[12].AcameraisplacedatthefrontdooroftheVirtualUniversitywhichhelpstheuserstowalkaroundtheCampusasavisualizedplace.
2.2User'sEvaluation
InthedesignoftheVirtualCampuswehaveinvolvedusersoneverystageofSEEUvirtualcampusimplementation.Wehaveidentifiedthreemainstagesofimplementationwhereuser'sfeedbackwasvaluable.Thesestagescanbesummarizedasfollows.
2.2.1PreliminaryResearchStage
Thefirststageisdefinedaspreliminaryresearchstagewhereweanalyzeandchoosethesoftwareanditsessentialfeatures,collectbooksandotherneededresourceslikedigitalcamera,campusmap,buildingwalltexturesetc.AsprojectteamwedecidedtouseGoogleSketchUpbecause,comparingtoothertechnologiesitcharacterizeditselfwithsimplicity,efficiencyandscalability.
2.2.2TestingStage
Thesecondstageisdefinedastestingstageofthefirstdraft.Thisdraftwaspresentedto60studentswhoaretakingtheComputerGraphiccourse.Thequestionsraisedwere:
HowdoyouevaluatetheoveralllookofSEEUVirtualCampus?
HoweasydoyoufindthenavigationwithinVC?
Areyousatisfiedwiththenavigationspeed?
Does3-Dmodelingreflectsrealisticallyouruniversitycampus?
Thisobservationindicatedthat:
Theyliketowalkaroundtheirvisualizeduniversity
Theypreferamoresophisticatedtextureratherthansimplecoloringthewallsofthebuildings
Theypreferabetterspeedperformance
TheywouldliketoseetheirVirtualUniversityontheInternet
2.2.3FinalizationandPresentationStage
Thethirdstageisdefinedasfinalizationstage.Atthisstagewehadthefinaldesignwhichwaspresentedtoabroaderaudience.Thefeedbackfromaudienceandusersindicatedthat:
Theylikedthegenerallookofthevirtualcampus
TheyprefertousethevirtualcampusduringtheUniversitymarketingcampaign
Detailsenhancementwasrecommended
3.IMPLEMENTATION
ThedesignofTheVirtualCampusisoriginallybasedonthevirtualworldconcept.Understandingtherealizationofaproject,wordsareabstractones,iftheyarenotrealizedinwork.Thispart,hasbeendealingwithdescriptionofthestepsforimplementingthecampusitself.
Thefirstneededthingwastoknowabouttheexactmarginsoftheoverallcampus.Thediscussionwasdonewiththeresponsibleuniversitystaff,whichgaveusthesketchofthecontentthatweplannedtorealize.Afterthis,themappingcouldbestarted.
3.1Mapping
Themapping,definedthegeneralparametersthatcamefromthesketch.Themappinghasbeendoneintwodimensionalenvironments.Atthispoint,thesizeofthefieldswasdefined,inbaseofthewidenessanddistanceofeveryobjectfromone–another.Itstartedwiththelandscape,afterthatwiththeroads,andfinallytobefinished
withobjendthem.
3.2Objectextrusion
Oncethemappingwascompleted,thedefinitionofwireframeobjects,byraisingtheminacertainaxeswasperformed.Thisprocessisknownasobjectextrusionwhichcreatesfullyscaled3Dobjects.
3.3SurfaceDefinitionsandHiddenSurfaceRemoval
Wireframeobjectasshownonfigure2aresuitableonlyformodeling,butnotforgeneralpresentation.Thenextstageisdefiningthesidesofsurfacesaswellashidingsurfacesthatarenotvisible.Atechniquewhichiswidelyknowsashiddensurfaceremoval.Withthistechniqueobjectsgaindepthrelativetoeachother.
3.4TextureMapping
Thelastpartoftheimplementation,surelythemosteye–valuab
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