CATIA照片级渲染.ppt

CopyrightDASSAULTSYSTEMES2002,1,PhotoStudio,CATIATrainingFoils,Version5Release9June2002EDU-CAT-E-PHS-FF-V5R9,CopyrightDASSAULTSYSTEMES2002,2,CoursePresentation,ObjectivesofthecourseInthiscourseyouwilllearnhowtocreateaphotorealisticimageTargetedaudienceNewCATIAV5usersPrerequisitesCATIAV5fundamentals,0.5day,CopyrightDASSAULTSYSTEMES2002,3,IntroductiontoPhotoStudiop.6WorkbenchPresentationp.7Accessingtheworkbenchp.8Userinterfacep.9Generalprocessp.15QuickStartp.16Environmentmanagementp.18Creatingaboxenvironmentp.20Positioningtheenvironmentp21Dimensioningtheenvironmentp23Cameramanagementp.26Creatingacamerap.27Positioningacamerap.28Definingthecameralensp.30Lightsourcesmanagementp.31Creatingaspotlightp.33Positioningaspotlightp.34Definingthespotlightparametersp.36,TableofContents(1/3),CopyrightDASSAULTSYSTEMES2002,4,Shootingmanagementp.39Creatingashootingp.41Definingtheframep.42Definingthequalityparametersp.44Computingtheimagep.45Texturesmanagementp.46Applyingtexturetotheenvironmentp.47Editingtheenvironmenttexturepropertiesp.49Applyingmaterialtoacomponentp.50Editingamaterialpropertiesp.52Stickersmanagementp.56Creatingastickerp.57Mappingastickerp.58Adjustingastickerp.61Definingastickertexturep.62Definingastickerlightingparametersp.63,TableofContents(2/3),CopyrightDASSAULTSYSTEMES2002,5,Animation:Turntablemanagementp.64Creatingaturntablep.65DefiningtheTurntableparametersp.66Simulatingananimationp.67Computingananimationp.68Animation:Animatingsceneelementsp.70Creatingananimationp.71Addingelementstoananimationp.72Defininganimatedelementsparametersp.73Creatingandmodifyingshotsp.74Usingcatalogsp.75,TableofContents(3/3),CopyrightDASSAULTSYSTEMES2002,6,IntroductiontoPhotoStudio,InthislessonyouwillseeV5PhotoStudiouserinterfaceandcomputeyourfirstbasicrealisticimagePhotoStudioWorkbenchPresentationAccessingtheworkbenchUserInterface:PhotoStudioGeneralPresentationUserInterface:PhotoStudiotoolsUserInterface:PhotoStudiotoolsUserSettingsGeneralProcessQuickStart:usingtheQuickRenderAdditionalInformation.,CopyrightDASSAULTSYSTEMES2002,7,YouwilllearnaboutthePhotoStudioWorkbenchbyAccessingtheWorkbenchExploringtheUserInterfaceUnderstandingGeneralProcess,PhotoStudioWorkbenchPresentation,CopyrightDASSAULTSYSTEMES2002,8,AccessingtheWorkbench,CopyrightDASSAULTSYSTEMES2002,9,PhotoStudiotools.,Producttree,Standardtools,UserInterface:PhotoStudioGeneralPresentation,PhotoStudiofeatures,CopyrightDASSAULTSYSTEMES2002,10,Sceneeditor:EnvironmentLightsourcesCamera,UserInterface:PhotoStudiotools,Animationtools,Rendering:ImageparametersComputation,Applymaterialandstickers,CopyrightDASSAULTSYSTEMES2002,11,UserSettings(1/3),SelectPhotoStudio,SelectDisplay,Definethelightsourcedisplaymode,Definetheenvironmentdisplaymode,RestartCATIAaftermodifyingtheparameters,CopyrightDASSAULTSYSTEMES2002,12,UserSettings(2/3),SelectPhotoStudio,SelectOutput,DefinetheQuickRenderparameters,RestartCATIAaftermodifyingtheparameters,Definethefilenamemanagement,CopyrightDASSAULTSYSTEMES2002,13,UserSettings(3/3),SelectPhotoStudio,SelectSticker,RestartCATIAaftermodifyingtheparameters,Definethedefaultstickersimage,CopyrightDASSAULTSYSTEMES2002,14,FromaProduct,Createanenvironment,Createacamera,Createlightsources,Createashooting,Launchthecomputation,GeneralProcess,Definethecomponentstexturesandstickers,CopyrightDASSAULTSYSTEMES2002,15,QuickStart:usingtheQuickRender,InthisQuickStartyouwilldiscoverthruasimpledemonstration,thebaseofthecreationofaphotorealisticimageusingtheQuickRender.Theobjectiveisnottocontrolalltheparametersoftheimage,buttocreatequicklyarealisticimagefromthe3Dviewerdisplay.,CopyrightDASSAULTSYSTEMES2002,16,Computationparameters:Defaultparametershavebeenpredefinedtohelptheusertogetquicklyarealisticimage.Ifanactiveenvironmenthasbeendefinedbytheuser,itwillbetakenintoaccountbytheQuickRender.Ifactivelightsexistinthesession,theywillbetakenintoaccount.Ifnolightisactive,adefaultlightpositionedatthecurrentviewpointwillbeused.Theimagedestinationfilecanbedefinedinthesettings.Aprecisesizeinpixelscanbedefinedfortheimageinthesettings.Applyingmaterial:Ifamaterialisappliedtoapartbeinginstancedintheproduct,alltheinstanceswillhavethesameattributes.Ex:thebuttonsYoucanalsoapplythematerialtotheinstanceitselfsothatthesameparthasdifferenteffectsintheimage,dependingonitsinstance.,AdditionalInformation.,CopyrightDASSAULTSYSTEMES2002,17,EnvironmentManagement,InthislessonyouwilllearnhowtomanagethesceneenvironmentWhataboutenvironment?CreatingaboxenvironmentPositioningaboxenvironmentDimensioningaboxenvironmentAdditionalInformation.,CopyrightDASSAULTSYSTEMES2002,18,Whataboutenvironment?,Whatisanenvironment?Tomakeyourimagemorerealistic,youneedtoplacetheobjectyouwanttorenderincontext.Theenvironmentisageometrywhichwillsurroundyourobjectandwillhelpyoutocreatethecontextbyapplyingtexturestoit.WhichenvironmentscanIuse?CATIAPhotoStudioprovides4differenttypesofenvironment:AboxAsphereAcylinderEnvironmentpredefinedusingRealvizsoftwareStitcherDependingthecontextyouwanttocreate,youwilluseoneshapeoranother.Forexample,asphericalenvironmentcanbeusedtorenderaplaneflyinginthesky.,CopyrightDASSAULTSYSTEMES2002,19,AdefaultboxenvironmentiscreatedaroundtheproductFaceslocatedbetweentheviewpointandtheproductareautomaticallymadetransparentfortheeye,buttheywillbereflectedbyreflectiveobjects.,SelecttheCreateBoxEnvironmenticon,Creatingaboxenvironment,Anewfeatureisaddedinthetree,CopyrightDASSAULTSYSTEMES2002,20,Modifythepositionoftheenvironmentusingthestandardtoolsofthecompass,Positionthecompassontheenvironment,Positioningaboxenvironment(1/2),Dynamically,CopyrightDASSAULTSYSTEMES2002,21,SelectPropertiesintheenvironmentcontextualmenuordouble-clickit,SelectPosition,Positioningaboxenvironment(2/2),Usingprecisevalues,1,2,Definethecoordinatesoftheboxorigin,Definetheorientationoftheboxorigin,3,4,CopyrightDASSAULTSYSTEMES2002,22,Selectanedgeoftheboxanddragit.Thiswillapplyascalingcenteredontheboxcenter.,Selectawalloftheboxanddragit.Thiswilltranslatethewall.,Dimensioningaboxenvironment(1/2),Dynamically,Globalscaling,Wallpositioning,CopyrightDASSAULTSYSTEMES2002,23,SelectPropertiesintheenvironmentcontextualmenuordouble-clickit,SelectDimensions,Dimensioningaboxenvironment(2/2),Usingprecisevalues,1,2,Definethedimensionsofthebox,3,CopyrightDASSAULTSYSTEMES2002,24,AdditionalInformation.,Severalenvironmentscanbedefinedinasession.Anenvironmentisactivatedusingthisoptionofitscontextualmenu,Youcangetthedefaultgeometryboundingboxusingthisoptionoftheenvironmentcontextualmenu,CopyrightDASSAULTSYSTEMES2002,25,CameraManagement,InthislessonyouwilllearnhowtomanagecamerasCreatingacameraPositioningacameraDefiningthecameralens,CopyrightDASSAULTSYSTEMES2002,26,Acameraisdefinedsothattheresultingimagecorrespondstothecurrentviewerviewpoint,SelecttheCreateCameraicon,Creatingacamera,Anewfeatureisaddedinthetree,Defineaviewpointusingthemousemanipulation,1,2,Cameradisplaywhenselected:,StandardCameradisplay:,CopyrightDASSAULTSYSTEMES2002,27,Greenpointmovestheoriginpointinthescreenplane,Positioningacamera(1/2),Dynamically,Greensquaretranslatestheoriginpoint,Greensquaretranslatesthetargetpoint,Greenpointmovesthetargetpointinthescreenplane,CopyrightDASSAULTSYSTEMES2002,28,SelectPropertiesintheenvironmentcontextualmenu,SelectPosition,Positioningacamera(2/2),Usingprecisevalues,1,2,Definethecoordinatesofthecameraorigin,Definethecoordinatesofthecameratarget,3,4,CopyrightDASSAULTSYSTEMES2002,29,SelectPropertiesintheenvironmentcontextualmenu,SelectLens,Definingthecameralens,1,2,Definetheprojectiontype.Perspectiveprojectionprovidesmorerealisticresults.,Definethefocallength.Youshouldavoidsmallvaluesasitwilldeformtheobjectontheimage.Youshouldbettertakethecameraawayfromtheobject.,3,4,Thisviewercanbeusedtodefinethepositionofthecamerawiththemousemanipulationtools.Youcangetthesameviewinthe3Dviewerbydoubleclickingthecamerainthetreeorintheviewer.,CopyrightDASSAULTSYSTEMES2002,30,LightSourcesManagement,InthislessonyouwilllearnhowtohandlelightsourcesWhataboutlightsources?CreatingaspotlightPositioningaspotlightDefiningaspotlightparametersDefiningasurfaciclightparametersAdditionalinformation,CopyrightDASSAULTSYSTEMES2002,31,Whataboutlightsources?,Lightsourcesarenotjustusedtolightuptheenvironmentandmakeobjectvisible.Bygeneratingshadowsandilluminationvariationsontheobjectsurface,theygivetheimageitseffectofreliefandmakeitmorerealistic.WhichlightsourcescanIuseinPhotoStudio?“Ponctual”lightsources:ASpotlight:Itprojectsaconeoflightfromagivenpointtoagivendirection.Itistheonlytypeoflightsourcewhichconcentrateslightsraysonaspecificpartofthescene.Itisthusveryusefultohighlightdetails.APointlight:Itscatterslightinalldirectionsfromagivenpointlikeanelectriclamp.ADirectionallight:Thelightreachesthesceneintheformofparallelraysasifithadbeenemittedbyaplane.Itsimulateslightemittedbyaverydistantsourcesuchasthesun.Surfaciclightsources,creatingmorerealisticimagesbygeneratingsoftshadows:AdiskarealighttosimulatespotlightAspherearealighttosimulatelightbulbArectangulararealightthatcansimulateadistantlightsourceAcylinderarealighttosimulateneonsramp,CopyrightDASSAULTSYSTEMES2002,32,SelecttheCreateSpotLighticon,Creatingaspotlight,Anewfeatureisaddedinthetree,Spotlightdisplaywhenselected:,StandardSpotlightdisplay:,Thespotlighteffectisvisualizedinthe3Dviewer,CopyrightDASSAULTSYSTEMES2002,33,Greenpointmovestheoriginpointinthescreenplane,Chooseaviewpointusingthemousemanipulationtools,Positioningaspotlight(1/2),Dynamically,Greensquaretranslatestheoriginpoint,Greensquaretranslatesthetargetpoint,Greenpointmovesthetargetpointinthescreenplane,Computethespotlightpositionusingthisoption.Onlytheorigincoordinateswillbemodified.,CopyrightDASSAULTSYSTEMES2002,34,SelectPropertiesintheenvironmentcontextualmenuordouble-clickit,SelectPosition,Positioningaspotlight(2/2),Usingprecisevalues,1,2,Definethecoordinatesofthespotorigin,DefinethecoordinatesofthespottargetAfterthetargetpoint,thespotiscompletelydark,3,4,CopyrightDASSAULTSYSTEMES2002,35,Selectonesolidedgeofthespotlightconeanddragittodefinetheconeangle,Definingaspotlightparameter(1/2),Dynamically,Selectonesolidedgeofthespotlightextremityanddragittodefinetheconeend.Outsidethecone,nolightisdiffused.,CopyrightDASSAULTSYSTEMES2002,36,SelectPropertiesintheenvironmentcontextualmenuordouble-clickit,SelectLighting,Definingaspotlightparameter(2/2),Usingprecisevalues,1,2,Definetheintensityandthecolorofthespotlight,Definetheangleofthespotlight,5,4,Definethelengthofthespotlightray.Thismovesthetargetpointinthespotdirection.,6,Definethelinearattenuation,7,Definetheangularattenuation,8,Activatetheshadowgenerationatrenderingtime,9,Definethetypeof“ponctual”lightsource,3,CopyrightDASSAULTSYSTEMES2002,37,SelectPropertiesintheenvironmentcontextualmenuordouble-clickit,SelectArea,Definingasurfaciclightparameter,1,2,DefinetheUandVsamplesThehigherthevaluesare,thelessgrainythelightingwillbe.Computationtimeincreaseswiththesamplesvalues.,Definethelightsourcesurfacedimensions,5,4,Definethetypeofsurfaciclightsource,3,CopyrightDASSAULTSYSTEMES2002,38,AdditionalInformation.,Computationresultwitha“punctual”spotlight,Computationresultwithasurfacicdiskarealight,CopyrightDASSAULTSYSTEMES2002,39,ShootingManagement,InthislessonyouwilllearnhowtodefinealltheimageparametersWhataboutshooting?CreatingashootingDefiningtheframeAdditionalInformation.DefiningthequalityparametersComputingtheimage,CopyrightDASSAULTSYSTEMES2002,40,Whataboutshooting?,CATIAPhotoStudioshootingdefinesalltheparametersthatwillbeusedforthecomputationofaspecificimagefromagivenproduct.Theparametersaresortedin4categories:TheFrameparameters:Youwilldefinethescene(whichenvironment,whichcamera,whichlightsources),theresultingimagesizeandlocation.TheQualityparameters:Youwilldefinetherenderingqualityparameters.Theseparameterswillhaveabiginfluenceonthecomputationtimerequiredforyourimage.Theindirectilluminationparameter:Youwillactivatetheuseofthefinalgatheringalgorithmanddefineitsparameters.TheAnimationparameters:Youwilldefinethenumberofimagesyouwanttousefortheanimation.Theseparameterswillbedetailedinthenextchapter.,CopyrightDASSAULTSYSTEMES2002,41,SelecttheCreateshootingicon,Creatingashooting,Anewfeatureisaddedinthetree,CopyrightDASSAULTSYSTEMES2002,42,DefinethecamerayouwanttouseforthecomputationYoucanusethecurrentviewpointof3Dviewer,Definingtheframe,Definetheenvironmentyouwanttoseeontheimage,Definethelightsourcesyouwanttobeusedintheimage,Definethedestinationandtheformatofthecomputationresult,DefinetheimagesizeTheimageiscomputedusingthe3Dviewerratio.Itisthendeformedtofitintothedefinedsize.Toavoidthisdeformation,definetheratiooftheimagesizeequaltothe3Dviewerration.,SelectFrame,CopyrightDASSAULTSYSTEMES2002,43,AdditionalInformation.,Whatisraytracing?Raytracingisastandardimagerymode.ItisusedbyCATIAPhotoStudiotocreaterealisticimages.Howdoesitwork?Theimageisdividedinsquaresofpixels.Thesizeofthesquaresisdefinedbytheuser.Raytracingconsistsincalculatingthecolorateachcornerofeachsquareoftheimage,consideringalightrayfromthatcornerinthedirectioninwhichtheobjectsareviewed(cameraviewingdirection),followingthatrayuntilithitsanobject.Ifthatobjectisreflective,thereflectedrayistraceduntilithitsanotherobject,andsoon.Themaximumnumberofreflectionsforarayisoneofthequalityparameters.Iftheobjectistransparent,therayistracedasitcrossestheobject.Eachtimetheraymeetsanobject,thecharacteristicsoftheobjectarereadatthepointofincidence(color,reflectionmode,transparency,etc.)inordertodeducethecolorofthecornerofthepixelwheretheraycamefrom.,CopyrightDASSAULTSYSTEMES2002,44,Maximumnumberofreflectionsandrefractionsforaray.Increasingthisparameterwillincreasethecomputationtime.,Definingthequalityparameters,Activatetheuseoftheobjectstexturesfortheimagecomputation,Definetherenderingaccuracyusingpredefinedsetsofvalues,Activatetheshadowcomputation,SelectQuality,Activatetheanti-aliasing,Defineacustomizeddivisionoftheimage,Defineacriteriaforautomaticsubdivisionofthesquares,Definethemaximumnumberofsubdivisions,CopyrightDASSAULTSYSTEMES2002,45,AdditionalInformation.,Whatisfinalgathering?FinalGatheringhelpstocreateveryrealisticimagingbycreatingverysoftshadows.Thegeneralprincipalisthatthelightstrikingtheobjectisnotonlycomputedfromthelightsourcesbutalsofromtheotherelementscomposingthescene,asinreallife!Howdoesitwork?Lightraysaresentfromtheobjectspointsand,asthelightbouncesfromoneobjecttoanother,thelightenergyiscomputedonanysurfacessurroundingtheobject.Thisiswhatiscalledindirectillumination.Theuserhastodefinethenumberofraysthatwillbesentatrandomfromeachpixeltocalculatetheindirectilluminationfactor.Itwillbemultipliedbythematerialdiffuseparametercoefficient.Asaconsequence,noindirectilluminationwillbecomputedformaterialswithanulldiffusevalue.Toimproveperformances,theusercanuseaninterpolationalgorithmfromonepixeltoanotherinsteadofcomputingrealfinalgatheringforeachpoint.Maximumradiusparameterdefinesthemaximumdistancebetweenapointhavingarealfinalgatheringcomputationresultandaninterpolatedone.Minimumradiusdefinestheminimumdistancebetweentwopointshavingarealfinalgatheringcomputation.Increasingthemaximumradiusreducesthecomputationtime,butcancreateartefactsduetotheinterpolationprocess.,CopyrightDASSAULTSYSTEMES2002,46,AdditionalInformation.,Computationresultwithoutactivatingthefinalgathering,Computationresultwithactivationofthefinalgathering,CopyrightDASSAULTSYSTEMES2002,47,SelectIndirectIllumination,Definingtheindirectilluminationparameters,Activatetheuseofthefinalgatheringfortheimagecomputation,Definethenumberofraysemittedbyeachobjectpoint.,Definethemaximumradiusvalue.Ifsetto0,thisvalueisautomaticallycomputedaccordingtothescenesize.,Definetheminimumradiusvalue.Ifsetto0,thisvalueisautomaticallytunedto10%ofthemaximumradius.,CopyrightDASSAULTSYSTEMES2002,48,Computingtheimage,SelecttheRenderShootingicon,Launchthecomputation,Usingthecontextualmenu,Usingthecomputationicon,SelecttheShootingtorenderinthetree,Launchthecomputation,CopyrightDASSAULTSYSTEMES2002,49,TexturesManagement,InthislessonyouwilllearnhowtohandletexturesApplyingtexturestotheenvironmentEditingenvironmentstexturesApplyingmaterialtoacomponentEditingmaterials,CopyrightDASSAULTSYSTEMES2002,50,Selectthewallinthetree,1,Selectatexturefile.,Applyingtexturestotheenvironment(1/2),2,Scaletheimagesothatitdoesfitontheentirewall,4,FlipthetextureimageintheUandVdirectionsifnecessary,2,Lockthetexturesizeduringthemodificationoftheenvironmentdimensions,3,CopyrightDASSAULTSYSTEMES2002,51,Applyingtexturestotheenvironment(2/2),Selectthewallinthetree,SelecttheApplyMaterialicon,2,1,Selectamateriallibrary,3,Selectamaterial,4,CopyrightDASSAULTSYSTEMES2002,52,Selectthewallinthetree,Editingenvironmentstextures,Defineascalefactorforthetextureinbothdirections.Theratiobetweenthetwovaluescanbemaintainedconstant.,Translatethetextureinbothdirections,Youcanrotatethetexture,CopyrightDASSAULTSYSTEMES2002,53,Selectthecomponentinthetree,1,SelectApplymaterialicon,Applyingmaterialtoacomponent(1/2),2,Ifyouapplythematerialtothepart,thematerialwillbeappliedtoalltheinstancesofthispart(ex:thekeyboardbuttons)Youcanalsoapplythematerialtotheinstanceoftheparttocreatedifferenteffectsoneachinstance.,CopyrightDASSAULTSYSTEMES2002,54,Selectafamilyofmaterial,3,Applyingmaterialtoacomponent(2/2),Selectamaterial,4,Thematerialappearsinthetree,attachedtothepart,CopyrightDASSAULTSYSTEMES2002,55,Selectthematerialinthetree,1,Editingmaterials(1/5),2,Definetheambientcolorofthematerial,Definethediffusecolorofthematerial.Shinymaterialwillneedlowvalue.,SelectLighting,4,Definethespecularcolorofthematerial.Shinymaterialwillneedhighvalue.,SelectRendering,3,Definethedullnessofthematerial.Highvaluewillcreatelargespecularspotsonthepart.,CopyrightDASSAULTSYSTEMES2002,56,Editingmaterials(2/5),Definethetransparencyofthematerial.Thisparametershouldbedefinedattheend.,Definethereflectivityofthematerial.,Previewoftheresult,Definetherefractionparameterofatransparentmaterial.,De