CATIA照片級渲染專題培訓課件

CATIA照片級渲染CoursePresentationObjectivesofthecourseInthiscourseyouwilllearnhowtocreateaphotorealisticimageTargetedaudienceNewCATIAV5users

Prerequisites

CATIAV5fundamentals0.5day2CopyrightDASSAULTSYSTEMES2002IntroductiontoPhotoStudio 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)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)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)5CopyrightDASSAULTSYSTEMES2002IntroductiontoPhotoStudioInthislessonyouwillseeV5PhotoStudiouserinterfaceandcomputeyourfirstbasicrealisticimagePhotoStudioWorkbenchPresentationAccessingtheworkbenchUserInterface:PhotoStudioGeneralPresentationUserInterface:PhotoStudiotoolsUserInterface:PhotoStudiotoolsUserSettingsGeneralProcessQuickStart:usingtheQuickRenderAdditionalInformation...6CopyrightDASSAULTSYSTEMES2002YouwilllearnaboutthePhotoStudioWorkbenchbyAccessingtheWorkbenchExploringtheUserInterfaceUnderstandingGeneralProcessPhotoStudioWorkbenchPresentation7CopyrightDASSAULTSYSTEMES2002AccessingtheWorkbench8CopyrightDASSAULTSYSTEMES2002PhotoStudiotools...ProducttreeStandardtoolsUserInterface:PhotoStudioGeneralPresentationPhotoStudiofeatures…9CopyrightDASSAULTSYSTEMES2002Sceneeditor:EnvironmentLightsourcesCameraUserInterface:PhotoStudiotoolsAnimationtoolsRendering:ImageparametersComputationApplymaterialandstickers10CopyrightDASSAULTSYSTEMES2002UserSettings(1/3)SelectPhotoStudioSelectDisplayDefinethelightsourcedisplaymodeDefinetheenvironmentdisplaymodeRestartCATIAaftermodifyingtheparameters11CopyrightDASSAULTSYSTEMES2002UserSettings(2/3)SelectPhotoStudioSelectOutputDefinetheQuickRenderparametersRestartCATIAaftermodifyingtheparametersDefinethefilenamemanagement12CopyrightDASSAULTSYSTEMES2002UserSettings(3/3)SelectPhotoStudioSelectStickerRestartCATIAaftermodifyingtheparametersDefinethedefaultstickersimage13CopyrightDASSAULTSYSTEMES2002FromaProductCreateanenvironmentCreateacameraCreatelightsourcesCreateashootingLaunchthecomputationGeneralProcessDefinethecomponentstexturesandstickers14CopyrightDASSAULTSYSTEMES2002QuickStart:usingtheQuickRenderInthisQuickStartyouwilldiscoverthruasimpledemonstration,thebaseofthecreationofaphotorealisticimageusingtheQuickRender.Theobjectiveisnottocontrolalltheparametersoftheimage,buttocreatequicklyarealisticimagefromthe3Dviewerdisplay.15CopyrightDASSAULTSYSTEMES2002Computationparameters:Defaultparametershavebeenpredefinedtohelptheusertogetquicklyarealisticimage.Ifanactiveenvironmenthasbeendefinedbytheuser,itwillbetakenintoaccountbytheQuickRender.Ifactivelightsexistinthesession,theywillbetakenintoaccount.Ifnolightisactive,adefaultlightpositionedatthecurrentviewpointwillbeused.Theimagedestinationfilecanbedefinedinthesettings.Aprecisesizeinpixelscanbedefinedfortheimageinthesettings.Applyingmaterial:Ifamaterialisappliedtoapartbeinginstancedintheproduct,alltheinstanceswillhavethesameattributes.Ex:thebuttonsYoucanalsoapplythematerialtotheinstanceitselfsothatthesameparthasdifferenteffectsintheimage,dependingonitsinstance.AdditionalInformation...16CopyrightDASSAULTSYSTEMES2002EnvironmentManagementInthislessonyouwilllearnhowtomanagethesceneenvironmentWhataboutenvironment?Creatingaboxenvironment

PositioningaboxenvironmentDimensioningaboxenvironmentAdditionalInformation...17CopyrightDASSAULTSYSTEMES2002Whataboutenvironment?Whatisanenvironment?Tomakeyourimagemorerealistic,youneedtoplacetheobjectyouwanttorenderincontext.Theenvironmentisageometrywhichwillsurroundyourobjectandwillhelpyoutocreatethecontextbyapplyingtexturestoit.WhichenvironmentscanIuse?CATIAPhotoStudioprovides4differenttypesofenvironment:AboxAsphereAcylinderEnvironmentpredefinedusingRealvizsoftwareStitcherDependingthecontextyouwanttocreate,youwilluseoneshapeoranother.Forexample,asphericalenvironmentcanbeusedtorenderaplaneflyinginthesky.18CopyrightDASSAULTSYSTEMES2002AdefaultboxenvironmentiscreatedaroundtheproductFaceslocatedbetweentheviewpointandtheproductareautomaticallymadetransparentfortheeye,buttheywillbereflectedbyreflectiveobjects.SelecttheCreateBoxEnvironmenticonCreatingaboxenvironmentAnewfeatureisaddedinthetree19CopyrightDASSAULTSYSTEMES2002ModifythepositionoftheenvironmentusingthestandardtoolsofthecompassPositionthecompassontheenvironmentPositioningaboxenvironment(1/2)Dynamically20CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectPositionPositioningaboxenvironment(2/2)Usingprecisevalues12DefinethecoordinatesoftheboxoriginDefinetheorientationoftheboxorigin3421CopyrightDASSAULTSYSTEMES2002Selectanedgeoftheboxanddragit.Thiswillapplyascalingcenteredontheboxcenter.Selectawalloftheboxanddragit.Thiswilltranslatethewall.Dimensioningaboxenvironment(1/2)DynamicallyGlobalscalingWallpositioning22CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectDimensionsDimensioningaboxenvironment(2/2)Usingprecisevalues12Definethedimensionsofthebox323CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Severalenvironmentscanbedefinedinasession.AnenvironmentisactivatedusingthisoptionofitscontextualmenuYoucangetthedefaultgeometryboundingboxusingthisoptionoftheenvironmentcontextualmenu24CopyrightDASSAULTSYSTEMES2002CameraManagementInthislessonyouwilllearnhowtomanagecamerasCreatingacamera

PositioningacameraDefiningthecameralens25CopyrightDASSAULTSYSTEMES2002AcameraisdefinedsothattheresultingimagecorrespondstothecurrentviewerviewpointSelecttheCreateCameraiconCreatingacameraAnewfeatureisaddedinthetreeDefineaviewpointusingthemousemanipulation12Cameradisplaywhenselected:StandardCameradisplay:26CopyrightDASSAULTSYSTEMES2002GreenpointmovestheoriginpointinthescreenplanePositioningacamera(1/2)DynamicallyGreensquaretranslatestheoriginpointGreensquaretranslatesthetargetpointGreenpointmovesthetargetpointinthescreenplane27CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuSelectPositionPositioningacamera(2/2)Usingprecisevalues12DefinethecoordinatesofthecameraoriginDefinethecoordinatesofthecameratarget3428CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuSelectLensDefiningthecameralens12Definetheprojectiontype.Perspectiveprojectionprovidesmorerealisticresults.Definethefocallength.Youshouldavoidsmallvaluesasitwilldeformtheobjectontheimage.Youshouldbettertakethecameraawayfromtheobject.34Thisviewercanbeusedtodefinethepositionofthecamerawiththemousemanipulationtools.Youcangetthesameviewinthe3Dviewerbydoubleclickingthecamerainthetreeorintheviewer.29CopyrightDASSAULTSYSTEMES2002LightSourcesManagementInthislessonyouwilllearnhowtohandlelightsourcesWhataboutlightsources?Creatingaspotlight

PositioningaspotlightDefiningaspotlightparametersDefiningasurfaciclightparametersAdditionalinformation…30CopyrightDASSAULTSYSTEMES2002Whataboutlightsources?Lightsourcesarenotjustusedtolightuptheenvironmentandmakeobjectvisible.Bygeneratingshadowsandilluminationvariationsontheobjectsurface,theygivetheimageitseffectofreliefandmakeitmorerealistic.WhichlightsourcescanIuseinPhotoStudio?“Ponctual”lightsources:ASpotlight:

Itprojectsaconeoflightfromagivenpointtoagivendirection.Itistheonlytypeoflightsourcewhichconcentrateslightsraysonaspecificpartofthescene.Itisthusveryusefultohighlightdetails.APointlight:

Itscatterslightinalldirectionsfromagivenpointlikeanelectriclamp.ADirectionallight:

Thelightreachesthesceneintheformofparallelraysasifithadbeenemittedbyaplane.Itsimulateslightemittedbyaverydistantsourcesuchasthesun.Surfaciclightsources,creatingmorerealisticimagesbygeneratingsoftshadows:AdiskarealighttosimulatespotlightAspherearealighttosimulatelightbulbArectangulararealightthatcansimulateadistantlightsourceAcylinderarealighttosimulateneon'sramp31CopyrightDASSAULTSYSTEMES2002SelecttheCreateSpotLighticonCreatingaspotlightAnewfeatureisaddedinthetreeSpotlightdisplaywhenselected:StandardSpotlightdisplay:Thespotlighteffectisvisualizedinthe3Dviewer32CopyrightDASSAULTSYSTEMES2002GreenpointmovestheoriginpointinthescreenplaneChooseaviewpointusingthemousemanipulationtoolsPositioningaspotlight(1/2)DynamicallyGreensquaretranslatestheoriginpointGreensquaretranslatesthetargetpointGreenpointmovesthetargetpointinthescreenplaneComputethespotlightpositionusingthisoption.Onlytheorigincoordinateswillbemodified.33CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectPositionPositioningaspotlight(2/2)Usingprecisevalues12DefinethecoordinatesofthespotoriginDefinethecoordinatesofthespottargetAfterthetargetpoint,thespotiscompletelydark3434CopyrightDASSAULTSYSTEMES2002SelectonesolidedgeofthespotlightconeanddragittodefinetheconeangleDefiningaspotlightparameter(1/2)DynamicallySelectonesolidedgeofthespotlightextremityanddragittodefinetheconeend.Outsidethecone,nolightisdiffused.35CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectLightingDefiningaspotlightparameter(2/2)Usingprecisevalues12DefinetheintensityandthecolorofthespotlightDefinetheangleofthespotlight54Definethelengthofthespotlightray.Thismovesthetargetpointinthespotdirection.6Definethelinearattenuation7Definetheangularattenuation8Activatetheshadowgenerationatrenderingtime9Definethetypeof“ponctual”lightsource336CopyrightDASSAULTSYSTEMES2002SelectPropertiesintheenvironmentcontextualmenuordouble-clickitSelectAreaDefiningasurfaciclightparameter12DefinetheUandVsamplesThehigherthevaluesare,thelessgrainythelightingwillbe.Computationtimeincreaseswiththesamplesvalues.Definethelightsourcesurfacedimensions54Definethetypeofsurfaciclightsource337CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Computationresultwitha“punctual”spotlightComputationresultwithasurfacicdiskarealight38CopyrightDASSAULTSYSTEMES2002ShootingManagementInthislessonyouwilllearnhowtodefinealltheimageparametersWhataboutshooting?CreatingashootingDefiningtheframeAdditionalInformation...DefiningthequalityparametersComputingtheimage39CopyrightDASSAULTSYSTEMES2002Whataboutshooting?CATIAPhotoStudioshootingdefinesalltheparametersthatwillbeusedforthecomputationofaspecificimagefromagivenproduct.Theparametersaresortedin4categories:TheFrameparameters:

Youwilldefinethescene(whichenvironment,whichcamera,whichlightsources),theresultingimagesizeandlocation.TheQualityparameters:

Youwilldefinetherenderingqualityparameters.Theseparameterswillhaveabiginfluenceonthecomputationtimerequiredforyourimage.Theindirectilluminationparameter:

Youwillactivatetheuseofthefinalgatheringalgorithmanddefineitsparameters.TheAnimationparameters:

Youwilldefinethenumberofimagesyouwanttousefortheanimation.Theseparameterswillbedetailedinthenextchapter.40CopyrightDASSAULTSYSTEMES2002SelecttheCreateshootingiconCreatingashootingAnewfeatureisaddedinthetree41CopyrightDASSAULTSYSTEMES2002DefinethecamerayouwanttouseforthecomputationYoucanusethecurrentviewpointof3DviewerDefiningtheframeDefinetheenvironmentyouwanttoseeontheimageDefinethelightsourcesyouwanttobeusedintheimageDefinethedestinationandtheformatofthecomputationresultDefinetheimagesizeTheimageiscomputedusingthe3Dviewerratio.Itisthendeformedtofitintothedefinedsize.Toavoidthisdeformation,definetheratiooftheimagesizeequaltothe3Dviewerration.SelectFrame42CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Whatisraytracing?Raytracingisastandardimagerymode.ItisusedbyCATIAPhotoStudiotocreaterealisticimages.Howdoesitwork?Theimageisdividedinsquaresofpixels.Thesizeofthesquaresisdefinedbytheuser.Raytracingconsistsincalculatingthecolorateachcornerofeachsquareoftheimage,consideringalightrayfromthatcornerinthedirectioninwhichtheobjectsareviewed(cameraviewingdirection),followingthatrayuntilithitsanobject.Ifthatobjectisreflective,thereflectedrayistraceduntilithitsanotherobject,andsoon.Themaximumnumberofreflectionsforarayisoneofthequalityparameters.Iftheobjectistransparent,therayistracedasitcrossestheobject.Eachtimetheraymeetsanobject,thecharacteristicsoftheobjectarereadatthepointofincidence(color,reflectionmode,transparency,etc.)inordertodeducethecolorofthecornerofthepixelwheretheraycamefrom.43CopyrightDASSAULTSYSTEMES2002Maximumnumberofreflectionsandrefractionsforaray.Increasingthisparameterwillincreasethecomputationtime.DefiningthequalityparametersActivatetheuseoftheobjectstexturesfortheimagecomputationDefinetherenderingaccuracyusingpredefinedsetsofvaluesActivatetheshadowcomputationSelectQualityActivatetheanti-aliasingDefineacustomizeddivisionoftheimageDefineacriteriaforautomaticsubdivisionofthesquaresDefinethemaximumnumberofsubdivisions44CopyrightDASSAULTSYSTEMES2002AdditionalInformation...Whatisfinalgathering?FinalGatheringhelpstocreateveryrealisticimagingbycreatingverysoftshadows.Thegeneralprincipalisthatthelightstrikingtheobjectisnotonlycomputedfromthelightsourcesbutalsofromtheotherelementscomposingthescene,asinreallife!Howdoesitwork?Lightraysaresentfromtheobjectspointsand,asthelightbouncesfromoneobjecttoanother,thelightenergyiscomputedonanysurfacessurroundingtheobject.Thisiswhatiscalled"indirectillumination".Theuserhastodefinethenumberofraysthatwillbesentatrandomfromeachpixeltocalculatetheindirectilluminationfactor.Itwillbemultipliedbythematerialdiffuseparametercoefficient.

Asaconsequence,noindirectilluminationwillbecomputedformaterialswithanulldiffusevalue.Toimproveperformances,theusercanuseaninterpolationalgorithmfromonepixeltoanotherinsteadofcomputingrealfinalgatheringforeachpoint.

Maximumradiusparameterdefinesthemaximumdistancebetweenapointhavingarealfinalgatheringcomputationresultandaninterpolatedone.

Minimumradiusdefinestheminimumdistancebetweentwopointshavingarealfinalgatheringcomputation.

Increasingthemaximumradiusreducesthecomputationtime,butcancreateartefactsduetotheinterpolationprocess.45CopyrightDASSAULTSYSTEMES2002AdditionalInformation...ComputationresultwithoutactivatingthefinalgatheringComputationresultwithactivationofthefinalgathering46CopyrightDASSAULTSYSTEMES2002SelectIndirectIlluminationDefiningtheindirectilluminationparametersActivatetheuseofthefinalgatheringfortheimagecomputationDefinethenumberofraysemittedbyeachobjectpoint.Definethemaximumradiusvalue.

Ifsetto0,thisvalueisautomaticallycomputedaccordingtothescenesize.Definetheminimumradiusvalue.Ifsetto0,thisvalueisautomaticallytunedto10%ofthemaximumradius.47CopyrightDASSAULTSYSTEMES2002ComputingtheimageSelecttheRenderShootingiconLaunchthecomputationUsingthecontextualmenuUsingthecomputationiconSelecttheShootingtorenderinthetreeLaunchthecomputation48CopyrightDASSAULTSYSTEMES2002TexturesManagementInthislessonyouwilllearnhowtohandletexturesApplyingtexturestotheenvironmentEditingenvironment’stexturesApplyingmaterialtoacomponentEditingmaterials49CopyrightDASSAULTSYSTEMES2002Selectthewallinthetree1Selectatexturefile.Applyingtexturestotheenvironment(1/2)2Scaletheimagesothatitdoesfitontheentirewall4FlipthetextureimageintheUandVdirectionsifnecessary2Lockthetexturesizeduringthemodificationoftheenvironmentdimensions350CopyrightDASSAULTSYSTEMES2002Applyingtexturestotheenvironment(2/2)SelectthewallinthetreeSelecttheApplyMaterialicon21Selectamateriallibrary3Selectamaterial451CopyrightDASSAULTSYSTEMES2002SelectthewallinthetreeEditingenvironment’stexturesDefineascalefactorforthetextureinbothdirections.

Theratiobetweenthetwovaluescanbemaintainedconstant.TranslatethetextureinbothdirectionsYoucanrotatethetexture52CopyrightDASSAULTSYSTEMES2002Selectthecomponentinthetree1SelectApplymaterialiconApplyingmaterialtoacomponent(1/2)2Ifyouapplythematerialtothepart,thematerialwillbeappliedtoalltheinstancesofthispart(ex:thekeyboardbuttons)Youcanalsoapplythematerialtotheinstanceoftheparttocreatedifferenteffectsoneachinstance.53CopyrightDASSAULTSYSTEMES2002Selectafamilyofmaterial3Applyingmaterialtoacomponent(2/2)Selectamaterial4Thematerialappearsinthetree,attachedtothepart54CopyrightDASSAULTSYSTEMES2002Selectthematerialinthetree1Editingmaterials(1/5)2DefinetheambientcolorofthematerialDefinethediffusecolorofthematerial.Shinymaterialwillneedlowvalue.SelectLighting4Definethespecularcolorofthematerial.Shinymaterialwillneedhighvalue.SelectRendering3Definethedullnessofthematerial.Highvaluewillcreatelargespecularspotsonthepart..55CopyrightDASSAULTSYSTEMES2002Editingmaterials(2/5)Definethetransparencyofthematerial.Thisparametershouldbedefinedattheend.Definethereflectivityofthematerial.PreviewoftheresultDefinetherefractionparameterofatransparentmaterial.Definethetransparencyclorofthematerial.56CopyrightDASSAULTSYSTEMES2002Selectthematerialinthetree1Editingmaterials(3/5)2Definethematerialsize.Ithelpstomakeglobalscalingofthetexture.ItiscombinedtotheScaleUandScaleVparameters.Definethewaythetexturewillbeprojectedonthecomponent.5modesareavailable:PlanarSphericalCylindricalCubical

AdaptativeSelectRendering3Selectthetexturefile.SelectTexture4Activateraytracedpreviewofthematerial57CopyrightDASSAULTSYSTEMES2002Editingmaterials(4/5)ScalethetextureinbothdirectionsTranslatethetextureinbothdirectionsDefinetheorientationofthetextureBydefault,thetextureisrepeateduntilitcoverstefullcomponent.Youcandecidetousethetextureonlyontimeinoneorbothdirections.58CopyrightDASSAULTSYSTEMES2002Editingmaterials(5/5)ModifythepositionofthetextureusingthecompassModifythetexturescaleusingthecornersSelectthematerialinthetree59CopyrightDASSAULTSYSTEMES2002StickersManagementInthislessonyouwilllearnhowtohandlestickersCreatingastickerAdjustingastickerDefiningastickerlightingparameters60CopyrightDASSAULTSYSTEMES2002ThestickerappearsintheproducttreeCreatingasticker(1/2)Selectthestickercreationicon61CopyrightDASSAULTSYSTEMES2002Creatingasticker(2/2)Selectthegeometrytouseforthestickermapping.Multi-selectionprocesisavailableDefinethetexturefileDefinethestickertexturescaleDefinethestickertextureposition62CopyrightDASSAULTSYSTEMES2002AdjustingastickerPositionthestickerusingthecompassSelectthestickerinthetreeDefinethestickerscaleusingthecorners63CopyrightDASSAULTSYSTEMES2002SelectthestickerinthetreeDefiningastickerlightingparameters1Selectlighting4SelectRendering3Definethelightingparametersasforanyothermaterial52Defineatransparencycolorifneeded64CopyrightDASSAULTSYSTEMES2002Animation:TurntableManagementInthislessonyouwilllearnhowtocreateasimpleanimationbyusingaturntableCreatingaturntableDefiningtheturntableparametersSimulatingtheanimationComputingtheanimation65CopyrightDASSAULTSYSTEMES2002SelecttheCreateTurntableiconCreatingaturntableAnewfeatureisaddedinthetreeTheturntableisrepresentedinthe3Dviewerbyanarc.66CopyrightDASSAULTSYSTEMES2002Youcandefinetheturntableparametersatitscreationorbydouble-clickingitsaxisinthetree.DefiningtheturntableparametersPositiontherotationaxisusingthestandardtoolsofthecompassDefinethestartandendrotationangle.Startangleto0meansthattheanimationstartswiththepositiontheobjecthasinthe3DviewerReversetherotationdirectionifnecessary67CopyrightDASSAULTSYSTEMES2002RewindthesimulationtoitsbeginningSimulatingtheanimationDouble-ClickontheturntableinthetreePlaythesimulation68CopyrightDASSAULT