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CATIA照片級(jí)渲染第1頁CoursePresentationObjectivesofthecourseInthiscourseyouwilllearnhowtocreateaphotorealisticimageTargetedaudienceNewCATIAV5users
Prerequisites
CATIAV5fundamentals0.5day第2頁2CopyrightDASSAULTSYSTEMES2002IntroductiontoPhotoStudio p.6WorkbenchPresentation p.7Accessingtheworkbench p.8Userinterface p.9Generalprocess p.15QuickStart p.16
Environmentmanagement p.18Creatingaboxenvironment p.20Positioningtheenvironment p21Dimensioningtheenvironment p23Cameramanagement p.26Creatingacamera p.27Positioningacamera p.28Definingthecameralens p.30Lightsourcesmanagement p.31Creatingaspotlight p.33Positioningaspotlight p.34Definingthespotlightparameters p.36TableofContents(1/3)第3頁3CopyrightDASSAULTSYSTEMES2002Shooting
management p.39Creatingashooting p.41Definingtheframe p.42Definingthequalityparameters p.44Computingtheimage p.45Texturesmanagement p.46Applyingtexturetotheenvironment p.47Editingtheenvironmenttextureproperties p.49Applyingmaterialtoacomponent p.50Editingamaterialproperties p.52Stickersmanagement p.56Creatingasticker p.57Mappingasticker p.58Adjustingasticker p.61Definingastickertexture p.62Definingastickerlightingparameters p.63TableofContents(2/3)第4頁4CopyrightDASSAULTSYSTEMES2002Animation:Turntablemanagement p.64Creatingaturntable p.65DefiningtheTurntableparameters p.66Simulatingananimation p.67Computingananimation p.68Animation:Animatingsceneelements p.70Creatingananimation p.71Addingelementstoananimation p.72Defininganimatedelementsparameters p.73Creatingandmodifyingshots p.74Usingcatalogs p.75TableofContents(3/3)第5頁5CopyrightDASSAULTSYSTEMES2002IntroductiontoPhotoStudioInthislessonyouwillseeV5PhotoStudiouserinterfaceandcomputeyourfirstbasicrealisticimagePhotoStudioWorkbenchPresentationAccessingtheworkbenchUserInterface:PhotoStudioGeneralPresentationUserInterface:PhotoStudiotoolsUserInterface:PhotoStudiotoolsUserSettingsGeneralProcessQuickStart:usingtheQuickRenderAdditionalInformation...第6頁6CopyrightDASSAULTSYSTEMES2002YouwilllearnaboutthePhotoStudioWorkbenchbyAccessingtheWorkbenchExploringtheUserInterfaceUnderstandingGeneralProcessPhotoStudioWorkbenchPresentation第7頁7CopyrightDASSAULTSYSTEMES2002AccessingtheWorkbench第8頁8CopyrightDASSAULTSYSTEMES2002PhotoStudiotools...ProducttreeStandardtoolsUserInterface:PhotoStudioGeneralPresentationPhotoStudiofeatures…第9頁9CopyrightDASSAULTSYSTEMES2002Sceneeditor:EnvironmentLightsourcesCameraUserInterface:PhotoStudiotoolsAnimationtoolsRendering:ImageparametersComputationApplymaterialandstickers第10頁10CopyrightDASSAULTSYSTEMES2002UserSettings(1/3)SelectPhotoStudioSelectDisplayDefinethelightsourcedisplaymodeDefinetheenvironmentdisplaymodeRestartCATIAaftermodifyingtheparameters第11頁11CopyrightDASSAULTSYSTEMES2002UserSettings(2/3)SelectPhotoStudioSelectOutputDefinetheQuickRenderparametersRestartCATIAaftermodifyingtheparametersDefinethefilenamemanagement第12頁12CopyrightDASSAULTSYSTEMES2002UserSettings(3/3)SelectPhotoStudioSelectStickerRestartCATIAaftermodifyingtheparametersDefinethedefaultstickersimage第13頁13CopyrightDASSAULTSYSTEMES2002FromaProductCreateanenvironmentCreateacameraCreatelightsourcesCreateashootingLaunchthecomputationGeneralProcessDefinethecomponentstexturesandstickers第14頁14CopyrightDASSAULTSYSTEMES2002QuickStart:usingtheQuickRenderInthisQuickStartyouwilldiscoverthruasimpledemonstration,thebaseofthecreationofaphotorealisticimageusingtheQuickRender.Theobjectiveisnottocontrolalltheparametersoftheimage,buttocreatequicklyarealisticimagefromthe3Dviewerdisplay.第15頁15CopyrightDASSAULTSYSTEMES2002Computationparameters:Defaultparametershavebeenpredefinedtohelptheusertogetquicklyarealisticimage.Ifanactiveenvironmenthasbeendefinedbytheuser,itwillbetakenintoaccountbytheQuickRender.Ifactivelightsexistinthesession,theywillbetakenintoaccount.Ifnolightisactive,adefaultlightpositionedatthecurrentviewpointwillbeused.Theimagedestinationfilecanbedefinedinthesettings.Aprecisesizeinpixelscanbedefinedfortheimageinthesettings.Applyingmaterial:Ifamaterialisappliedtoapartbeinginstancedintheproduct,alltheinstanceswillhavethesameattributes.Ex:thebuttonsYoucanalsoapplythematerialtotheinstanceitselfsothatthesameparthasdifferenteffectsintheimage,dependingonitsinstance.AdditionalInformation...第16頁16CopyrightDASSAULTSYSTEMES2002EnvironmentManagementInthislessonyouwilllearnhowtomanagethesceneenvironmentWhataboutenvironment?Creatingaboxenvironment
PositioningaboxenvironmentDimensioningaboxenvironmentAdditionalInformation...第17頁17CopyrightDASSAULTSYSTEMES2002Whataboutenvironment?Whatisanenvironment?Tomakeyourimagemorerealistic,youneedtoplacetheobjectyouwanttorenderincontext.Theenvironmentisageometrywhichwillsurroundyourobjectandwillhelpyoutocreatethecontextbyapplyingtexturestoit.WhichenvironmentscanIuse?CATIAPhotoStudioprovides4differenttypesofenvironment:AboxAsphereAcylinderEnvironmentpredefinedusingRealvizsoftwareStitcherDependingthecontextyouwanttocreate,youwilluseoneshapeoranother.Forexample,asphericalenvironmentcanbeusedtorenderaplaneflyinginthesky.第18頁18CopyrightDASSAULTSYSTEMES2002AdefaultboxenvironmentiscreatedaroundtheproductFaceslocatedbetweentheviewpointandtheproductareautomaticallymadetransparentfortheeye,buttheywillbereflectedbyreflectiveobjects.SelecttheCreateBoxEnvironmenticonCreatingaboxenvironmentAnewfeatureisaddedinthetree第19頁19CopyrightDASSAULTSYSTEMES2002ModifythepositionoftheenvironmentusingthestandardtoolsofthecompassPositionthecompassontheenvironmentPositioningaboxenvironment(1/2)Dynamically第20頁20CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectPositionPositioningaboxenvironment(2/2)Usingprecisevalues12DefinethecoordinatesoftheboxoriginDefinetheorientationoftheboxorigin34第21頁21CopyrightDASSAULTSYSTEMES2002Selectanedgeoftheboxanddragit.Thiswillapplyascalingcenteredontheboxcenter.Selectawalloftheboxanddragit.Thiswilltranslatethewall.Dimensioningaboxenvironment(1/2)DynamicallyGlobalscalingWallpositioning第22頁22CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectDimensionsDimensioningaboxenvironment(2/2)Usingprecisevalues12Definethedimensionsofthebox3第23頁23CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Severalenvironmentscanbedefinedinasession.AnenvironmentisactivatedusingthisoptionofitscontextualmenuYoucangetthedefaultgeometryboundingboxusingthisoptionoftheenvironmentcontextualmenu第24頁24CopyrightDASSAULTSYSTEMES2002CameraManagementInthislessonyouwilllearnhowtomanagecamerasCreatingacamera
PositioningacameraDefiningthecameralens第25頁25CopyrightDASSAULTSYSTEMES2002AcameraisdefinedsothattheresultingimagecorrespondstothecurrentviewerviewpointSelecttheCreateCameraiconCreatingacameraAnewfeatureisaddedinthetreeDefineaviewpointusingthemousemanipulation12Cameradisplaywhenselected:StandardCameradisplay:第26頁26CopyrightDASSAULTSYSTEMES2002GreenpointmovestheoriginpointinthescreenplanePositioningacamera(1/2)DynamicallyGreensquaretranslatestheoriginpointGreensquaretranslatesthetargetpointGreenpointmovesthetargetpointinthescreenplane第27頁27CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuSelectPositionPositioningacamera(2/2)Usingprecisevalues12DefinethecoordinatesofthecameraoriginDefinethecoordinatesofthecameratarget34第28頁28CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuSelectLensDefiningthecameralens12Definetheprojectiontype.Perspectiveprojectionprovidesmorerealisticresults.Definethefocallength.Youshouldavoidsmallvaluesasitwilldeformtheobjectontheimage.Youshouldbettertakethecameraawayfromtheobject.34Thisviewercanbeusedtodefinethepositionofthecamerawiththemousemanipulationtools.Youcangetthesameviewinthe3Dviewerbydoubleclickingthecamerainthetreeorintheviewer.第29頁29CopyrightDASSAULTSYSTEMES2002LightSourcesManagementInthislessonyouwilllearnhowtohandlelightsourcesWhataboutlightsources?Creatingaspotlight
PositioningaspotlightDefiningaspotlightparametersDefiningasurfaciclightparametersAdditionalinformation…第30頁30CopyrightDASSAULTSYSTEMES2002Whataboutlightsources?Lightsourcesarenotjustusedtolightuptheenvironmentandmakeobjectvisible.Bygeneratingshadowsandilluminationvariationsontheobjectsurface,theygivetheimageitseffectofreliefandmakeitmorerealistic.WhichlightsourcescanIuseinPhotoStudio?“Ponctual”lightsources:ASpotlight:
Itprojectsaconeoflightfromagivenpointtoagivendirection.Itistheonlytypeoflightsourcewhichconcentrateslightsraysonaspecificpartofthescene.Itisthusveryusefultohighlightdetails.APointlight:
Itscatterslightinalldirectionsfromagivenpointlikeanelectriclamp.ADirectionallight:
Thelightreachesthesceneintheformofparallelraysasifithadbeenemittedbyaplane.Itsimulateslightemittedbyaverydistantsourcesuchasthesun.Surfaciclightsources,creatingmorerealisticimagesbygeneratingsoftshadows:AdiskarealighttosimulatespotlightAspherearealighttosimulatelightbulbArectangulararealightthatcansimulateadistantlightsourceAcylinderarealighttosimulateneon'sramp第31頁31CopyrightDASSAULTSYSTEMES2002SelecttheCreateSpotLighticonCreatingaspotlightAnewfeatureisaddedinthetreeSpotlightdisplaywhenselected:StandardSpotlightdisplay:Thespotlighteffectisvisualizedinthe3Dviewer第32頁32CopyrightDASSAULTSYSTEMES2002GreenpointmovestheoriginpointinthescreenplaneChooseaviewpointusingthemousemanipulationtoolsPositioningaspotlight(1/2)DynamicallyGreensquaretranslatestheoriginpointGreensquaretranslatesthetargetpointGreenpointmovesthetargetpointinthescreenplaneComputethespotlightpositionusingthisoption.Onlytheorigincoordinateswillbemodified.第33頁33CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectPositionPositioningaspotlight(2/2)Usingprecisevalues12DefinethecoordinatesofthespotoriginDefinethecoordinatesofthespottargetAfterthetargetpoint,thespotiscompletelydark34第34頁34CopyrightDASSAULTSYSTEMES2002SelectonesolidedgeofthespotlightconeanddragittodefinetheconeangleDefiningaspotlightparameter(1/2)DynamicallySelectonesolidedgeofthespotlightextremityanddragittodefinetheconeend.Outsidethecone,nolightisdiffused.第35頁35CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectLightingDefiningaspotlightparameter(2/2)Usingprecisevalues12DefinetheintensityandthecolorofthespotlightDefinetheangleofthespotlight54Definethelengthofthespotlightray.Thismovesthetargetpointinthespotdirection.6Definethelinearattenuation7Definetheangularattenuation8Activatetheshadowgenerationatrenderingtime9Definethetypeof“ponctual”lightsource3第36頁36CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectAreaDefiningasurfaciclightparameter12DefinetheUandVsamplesThehigherthevaluesare,thelessgrainythelightingwillbe.Computationtimeincreaseswiththesamplesvalues.Definethelightsourcesurfacedimensions54Definethetypeofsurfaciclightsource3第37頁37CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Computationresultwitha“punctual”spotlightComputationresultwithasurfacicdiskarealight第38頁38CopyrightDASSAULTSYSTEMES2002ShootingManagementInthislessonyouwilllearnhowtodefinealltheimageparametersWhataboutshooting?CreatingashootingDefiningtheframeAdditionalInformation...DefiningthequalityparametersComputingtheimage第39頁39CopyrightDASSAULTSYSTEMES2002Whataboutshooting?CATIAPhotoStudioshootingdefinesalltheparametersthatwillbeusedforthecomputationofaspecificimagefromagivenproduct.Theparametersaresortedin4categories:TheFrameparameters:
Youwilldefinethescene(whichenvironment,whichcamera,whichlightsources),theresultingimagesizeandlocation.TheQualityparameters:
Youwilldefinetherenderingqualityparameters.Theseparameterswillhaveabiginfluenceonthecomputationtimerequiredforyourimage.Theindirectilluminationparameter:
Youwillactivatetheuseofthefinalgatheringalgorithmanddefineitsparameters.TheAnimationparameters:
Youwilldefinethenumberofimagesyouwanttousefortheanimation.Theseparameterswillbedetailedinthenextchapter.第40頁40CopyrightDASSAULTSYSTEMES2002SelecttheCreateshootingiconCreatingashootingAnewfeatureisaddedinthetree第41頁41CopyrightDASSAULTSYSTEMES2002DefinethecamerayouwanttouseforthecomputationYoucanusethecurrentviewpointof3DviewerDefiningtheframeDefinetheenvironmentyouwanttoseeontheimageDefinethelightsourcesyouwanttobeusedintheimageDefinethedestinationandtheformatofthecomputationresultDefinetheimagesizeTheimageiscomputedusingthe3Dviewerratio.Itisthendeformedtofitintothedefinedsize.Toavoidthisdeformation,definetheratiooftheimagesizeequaltothe3Dviewerration.SelectFrame第42頁42CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Whatisraytracing?Raytracingisastandardimagerymode.ItisusedbyCATIAPhotoStudiotocreaterealisticimages.Howdoesitwork?Theimageisdividedinsquaresofpixels.Thesizeofthesquaresisdefinedbytheuser.Raytracingconsistsincalculatingthecolorateachcornerofeachsquareoftheimage,consideringalightrayfromthatcornerinthedirectioninwhichtheobjectsareviewed(cameraviewingdirection),followingthatrayuntilithitsanobject.Ifthatobjectisreflective,thereflectedrayistraceduntilithitsanotherobject,andsoon.Themaximumnumberofreflectionsforarayisoneofthequalityparameters.Iftheobjectistransparent,therayistracedasitcrossestheobject.Eachtimetheraymeetsanobject,thecharacteristicsoftheobjectarereadatthepointofincidence(color,reflectionmode,transparency,etc.)inordertodeducethecolorofthecornerofthepixelwheretheraycamefrom.第43頁43CopyrightDASSAULTSYSTEMES2002Maximumnumberofreflectionsandrefractionsforaray.Increasingthisparameterwillincreasethecomputationtime.DefiningthequalityparametersActivatetheuseoftheobjectstexturesfortheimagecomputationDefinetherenderingaccuracyusingpredefinedsetsofvaluesActivatetheshadowcomputationSelectQualityActivatetheanti-aliasingDefineacustomizeddivisionoftheimageDefineacriteriaforautomaticsubdivisionofthesquaresDefinethemaximumnumberofsubdivisions第44頁44CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Whatisfinalgathering?FinalGatheringhelpstocreateveryrealisticimagingbycreatingverysoftshadows.Thegeneralprincipalisthatthelightstrikingtheobjectisnotonlycomputedfromthelightsourcesbutalsofromtheotherelementscomposingthescene,asinreallife!Howdoesitwork?Lightraysaresentfromtheobjectspointsand,asthelightbouncesfromoneobjecttoanother,thelightenergyiscomputedonanysurfacessurroundingtheobject.Thisiswhatiscalled"indirectillumination".Theuserhastodefinethenumberofraysthatwillbesentatrandomfromeachpixeltocalculatetheindirectilluminationfactor.Itwillbemultipliedbythematerialdiffuseparametercoefficient.
Asaconsequence,noindirectilluminationwillbecomputedformaterialswithanulldiffusevalue.Toimproveperformances,theusercanuseaninterpolationalgorithmfromonepixeltoanotherinsteadofcomputingrealfinalgatheringforeachpoint.
Maximumradiusparameterdefinesthemaximumdistancebetweenapointhavingarealfinalgatheringcomputationresultandaninterpolatedone.
Minimumradiusdefinestheminimumdistancebetweentwopointshavingarealfinalgatheringcomputation.
Increasingthemaximumradiusreducesthecomputationtime,butcancreateartefactsduetotheinterpolationprocess.第45頁45CopyrightDASSAULTSYSTEMES2002AdditionalInformation...ComputationresultwithoutactivatingthefinalgatheringComputationresultwithactivationofthefinalgathering第46頁46CopyrightDASSAULTSYSTEMES2002SelectIndirectIlluminationDefiningtheindirectilluminationparametersActivatetheuseofthefinalgatheringfortheimagecomputationDefinethenumberofraysemittedbyeachobjectpoint.Definethemaximumradiusvalue.
Ifsetto0,thisvalueisautomaticallycomputedaccordingtothescenesize.Definetheminimumradiusvalue.Ifsetto0,thisvalueisautomaticallytunedto10%ofthemaximumradius.第47頁47CopyrightDASSAULTSYSTEMES2002ComputingtheimageSelecttheRenderShootingiconLaunchthecomputationUsingthecontextualmenuUsingthecomputationiconSelecttheShootingtorenderinthetreeLaunchthecomputation第48頁48CopyrightDASSAULTSYSTEMES2002TexturesManagementInthislessonyouwilllearnhowtohandletexturesApplyingtexturestotheenvironmentEditingenvironment’stexturesApplyingmaterialtoacomponentEditingmaterials第49頁49CopyrightDASSAULTSYSTEMES2002Selectthewallinthetree1Selectatexturefile.Applyingtexturestotheenvironment(1/2)2Scaletheimagesothatitdoesfitontheentirewall4FlipthetextureimageintheUandVdirectionsifnecessary2Lockthetexturesizeduringthemodificationoftheenvironmentdimensions3第50頁50CopyrightDASSAULTSYSTEMES2002Applyingtexturestotheenvironment(2/2)SelectthewallinthetreeSelecttheApplyMaterialicon21Selectamateriallibrary3Selectamaterial4第51頁51CopyrightDASSAULTSYSTEMES2002SelectthewallinthetreeEditingenvironment’stexturesDefineascalefactorforthetextureinbothdirections.
Theratiobetweenthetwovaluescanbemaintainedconstant.TranslatethetextureinbothdirectionsYoucanrotatethetexture第52頁52CopyrightDASSAULTSYSTEMES2002Selectthecomponentinthetree1SelectApplymaterialiconApplyingmaterialtoacomponent(1/2)2Ifyouapplythematerialtothepart,thematerialwillbeappliedtoalltheinstancesofthispart(ex:thekeyboardbuttons)Youcanalsoapplythematerialtotheinstanceoftheparttocreatedifferenteffectsoneachinstance.第53頁53CopyrightDASSAULTSYSTEMES2002Selectafamilyofmaterial3Applyingmaterialtoacomponent(2/2)Selectamaterial4Thematerialappearsinthetree,attachedtothepart第54頁54CopyrightDASSAULTSYSTEMES2002Selectthematerialinthetree1Editingmaterials(1/5)2DefinetheambientcolorofthematerialDefinethediffusecolorofthematerial.Shinymaterialwillneedlowvalue.SelectLighting4Definethespecularcolorofthematerial.Shinymaterialwillneedhighvalue.SelectRendering3Definethedullnessofthematerial.Highvaluewillcreatelargespecularspotsonthepart..第55頁55CopyrightDASSAULTSYSTEMES2002Editingmaterials(2/5)Definethetransparencyofthematerial.Thisparametershouldbedefinedattheend.Definethereflectivityofthematerial.PreviewoftheresultDefinetherefractionparameterofatransparentmaterial.Definethetransparencyclorofthematerial.第56頁56CopyrightDASSAULTSYSTEMES2002Selectthematerialinthetree1Editingmaterials(3/5)2Definethematerialsize.Ithelpstomakeglobalscalingofthetexture.ItiscombinedtotheScaleUandScaleVparameters.Definethewaythetexturewillbeprojectedonthecomponent.5modesareavailable:PlanarSphericalCylindricalCubicalAdaptativeSelectRendering3Selectthetexturefile.SelectTexture4Activateraytracedpreviewofthematerial第57頁57CopyrightDASSAULTSYSTEMES2002Editingmaterials(4/5)ScalethetextureinbothdirectionsTranslatethetextureinbothdirectionsDefinetheorientationofthetextureBydefault,thetextureisrepeateduntilitcoverstefullcomponent.Youcandecidetousethetextureonlyontimeinoneorbothdirections.第58頁58CopyrightDASSAULTSYSTEMES2002Editingmaterials(5/5)ModifythepositionofthetextureusingthecompassModifythetexturescaleusingthecornersSelectthematerialinthetree第59頁59CopyrightDASSAULTSYSTEMES2002StickersManagementInthislessonyouwilllearnhowtohandlestickersCreatingastickerAdjustingastickerDefiningastickerlightingparameters第60頁60CopyrightDASSAULTSYSTEMES2002ThestickerappearsintheproducttreeCreatingasticker(1/2)Selectthestickercreationicon第61頁61CopyrightDASSAULTSYSTEMES2002Creatingasticker(2/2)Selectthegeometrytouseforthestickermapping.Multi-selectionprocesisavailableDefinethetexturefileDefinethestickertexturescaleDefinethestickertextureposition第62頁62CopyrightDASSAULTSYSTEMES2002AdjustingastickerPositionthestickerusingthecompassSelectthestickerinthetreeDefinethestickerscaleusingthecorners第63頁63CopyrightDASSAULTSYSTEMES2002SelectthestickerinthetreeDefiningastickerlightingparameters1Selectlighting4SelectRendering3Definethelightingparametersasforanyothermaterial52Defineatransparencycolorifneeded第64頁64CopyrightDASSAULTSYSTEMES2002Animation:TurntableManagementInthislessonyouwilllearnhowtocreateasimpleanimationbyusingaturntableCreatingaturntableDefiningtheturntableparametersSimulatingtheanimationComputingtheanimation第65頁65CopyrightDASSAULTSYSTEMES2002SelecttheCreateTurntableiconCreatingaturntableAnewfeatureisaddedinthetreeTheturntableisrepresentedinthe3Dviewerbyanarc.第66頁66CopyrightDASSAULTSYSTEMES2002Youcandefinetheturntableparametersatitscreationorbydouble-clickingitsaxisinthetree.DefiningtheturntableparametersPositiontherotationaxisusingthestandardtoolsofthecompassDefinethestartandendrotationangle.Startangleto0meansthattheanimationstartswiththepositiontheobjecthasinthe3DviewerReversetherotationdirectionifnecessary第67頁67CopyrightDASSAULTSYSTEMES2002RewindthesimulationtoitsbeginningSimulatingtheanimationDouble-ClickontheturntableinthetreePlaythesimulation第68頁68CopyrightDASSAULTSYSTEMES200
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