認識Scratch!DongJun

Feb20171ppt課件認識Scratch!DongJun

Feb20171p舞臺區2ppt課件舞臺區2ppt課件我來試一試1-1在舞臺上移動鼠標，觀察（x,y）坐標值的。如果鼠標超出了舞臺的邊緣，數值發生什么變化？3ppt課件我來試一試1-1在舞臺上移動鼠標，觀察（x,y）坐標值的。3我來試一試1-24ppt課件我來試一試1-24ppt課件舞臺背景區-試一試嘗試使用圖庫新建一個背景自己繪制一個背景打開一個文件作為背景利用攝像頭拍一張圖片作為背景5ppt課件舞臺背景區-試一試嘗試使用圖庫新建一個背景5ppt課件角色區-試一試嘗試使用圖庫新建一個角色自己繪制一個角色打開一個文件作為角色利用攝像頭拍一張圖片作為角色6ppt課件角色區-試一試嘗試使用圖庫新建一個角色6ppt課件探索積木區動作區外觀區偵測區聲音區事件區控制區畫筆區7ppt課件探索積木區動作區7ppt課件外觀顏色1-28ppt課件外觀顏色1-28ppt課件乒乓游戲第一步：準備背景第二步：加入乒乓和球板第三步：讓角色動起來乒乓球(角度方向，隨機值（向下（-45,45）向上（135,225）））球板（跟隨鼠標的x）9ppt課件乒乓游戲第一步：準備背景9ppt課件10ppt課件10ppt課件WhatisScratch?Scratchisafreeprogrammabletoolkitthatenableskidstocreatetheirowngames,animatedstories,andinteractiveartandsharetheircreationswithoneanotherovertheInternet.11ppt課件WhatisScratch?ScratchisafWhatisScratch?ScratchbuildsonthelongtraditionofLogoandLEGO/Logo,buttakesadvantageofnewcomputationalideasandcapabilitiestomakeiteasierforkidstogetstartedwithprogramming(loweringthefloor)andtoextendtherangeofwhatkidscancreateandlearn(raisingtheceiling).12ppt課件WhatisScratch?ScratchbuildsWhatisScratch?Theultimategoalistohelpkidsbecomefluentwithdigitalmedia,empoweringthemtoexpressthemselvescreativelyandmakeconnectionstopowerfulideas.13ppt課件WhatisScratch?TheultimategWhatisScratch?ScratchisbuiltontopoftheSqueakenvironmentdevelopedbyAlanKayandcolleagues.14ppt課件WhatisScratch?ScratchisbuiWhatisScratch?ScratchisbeingdevelopedbytheLifelongKindergartenresearchgroupattheMITMediaLab,incollaborationwithKIDSresearchgroupattheUCLAGraduateSchoolofEducation&InformationStudies.15ppt課件WhatisScratch?ScratchisbeiLet’sGetStarted!ToOpenScratch,double-clickontheScratch(cat)iconorclickonScratch.exe16ppt課件Let’sGetStarted!ToOpenScraGettingStartedWithScratchOnceyou’veopenedScratch,youshouldseethisdefaultscreen:17ppt課件GettingStartedWithScratchOnWatchaQuickIntroductiontoScratch!18ppt課件WatchaQuickIntroductiontoLet’sLookAtSomeScratchExamplesGotoOpen>ProjectsandchoosethecategoryAnimationLookthroughthemandseewhatyouwillbeabletodoinScratch!(Someofthesehavesound.Pleasebeconsiderateofyourneighborsandturnthesounddownonyourcomputers!Askyourteachertohelpyouifyoudon’tknowhow.)19ppt課件Let’sLookAtSomeScratchExaChooseYourSprite!Youwillnoticethatthedefaultspriteisanorangecat.(Aspriteisasmallgraphicthatcanbemovedindependentlyaroundthescreen,producinganimatedeffects.)YoucanchooseadifferentspritetoprogramfromalibraryinScratch,oryoucandrawyourown!Youwillcreateyourownspritelater.20ppt課件ChooseYourSprite!YouwillnoChooseYourSprite!TochooseaspritefromtheScratchlibrary,clickontheFolderwithaStaricon.Whenyouhoveryourmouseoverit,itwillsay“Choosenewspritefromfile”.21ppt課件ChooseYourSprite!TochooseaChooseYourSprite!Openthefoldersofthedifferentcategoriesofsprites.Chooseonethatyou’dliketoexperimentwithbydoubleclickingonit.Youcanhavemorethanonespriteinyouranimation!22ppt課件ChooseYourSprite!OpenthChooseYourSprite!Onceyouhaveaspritethatyou’dliketoprogram,youcandeletetheorangecatspritebyclickingthescissoriconandclickingonthecat!Makesurethatyouclickonthearrowiconbeforeyoudoanythingelse–otherwise,you’lldeletesomethingthatyoureallywanted!Youcanalsorightclickontheicontodeletethatsprite23ppt課件ChooseYourSprite!OnceyouhaResizeYourSprite!Youcanmakeyourspritelargerorsmallerbyusingthe“growsprite”or“shrinksprite”icons.Youclickononeoftheseicons,thenclickonyourspriteuntilitisthesizeyou’dlike.24ppt課件ResizeYourSprite!YoucanmakChooseYourBackground!Rightnow,youhaveaplain,whitebackground–boring!YoucanalsochangeyourbackgroundbychoosingonefromtheScratchlibraryorcreatingyourown!25ppt課件ChooseYourBackground!RightnChooseYourBackground!ClickontheStage:Now,selectthe“Backgrounds”tab!26ppt課件ChooseYourBackground!ClickoChangeYourBackground!Youcanexperimentwithcreatingorimportingyourownbackgroundlater,but,forrightnow–chooseonefromthelibrarybyselectingImport.27ppt課件ChangeYourBackground!YoucanChangeTheBackground!

Fromthisscreen,youcanchooseoneofthecategoryfolders,andselectabackgroundthatyoulikebydoubleclickingonit!28ppt課件ChangeTheBackground!FromNow,We’reReadytoProgram!Now,youshouldhaveaspriteandabackgroundthatyou’dliketoworkwith!29ppt課件Now,We’reReadytoProgram!NoProgrammingInScratch!Thefirstthingyouneedtodoistoclickonthespriteyouwanttoprogram,andselectthe“Scripts”tab.Sinceyourspriteistheonlythingthatcanbeanimated,makesureyouhaveitselected.TheScriptsareaiswhereyou“build”yourprogrambyusingtheprogrammingblocks.30ppt課件ProgrammingInScratch!ThefirProgrammingInScratch!Intheupper,left-handcornerofyourScratchwindow,youwillsee8buttons.Eachofthesebuttonshaveprogrammingblocksinthoseparticularareas.WewillfirstexperimentwiththeMotionblocks.31ppt課件ProgrammingInScratch!IntheMotion!Whenyouclickonthemotionbutton,youwillseetheprogrammingblocksthatcanbeusedwithyoursprite.Let’sallprogramourspriteswiththesamecodefirst,andthenyou’llbeallowedtoexperimentonyourown!32ppt課件Motion!WhenyouclickonthemMotion!Dragoutthe“move10steps”block.Changethe“10”to“50”byclickingintheblockandtypingin50.Toseeyourspritemove50pixelstotheright,doubleclickontheblockintheScriptarea.Cool,isn’tit?!33ppt課件Motion!Dragoutthe“move10sMotionYoucanalsosetthemotionblocktomoveanegativenumberofpixelsbytypinganegativenumberintheblock.Thiswillmoveyourspritethatnumberofpixelsintheoppositedirection.34ppt課件MotionYoucanalsosetthemotWhatIsAPixel?We’vebeentalkingaboutpixels–whatisapixel?Apixelisoneofthesmallunitsthatmakeupanimageonacomputerortelevisionscreen.Itisderivedfromthewordspictureandelementtomakepixel!

35ppt課件WhatIsAPixel?We’vebeentalTheScratchStageTheScratchstageis480pixelswideand360pixelshigh.-240240180-18036ppt課件TheScratchStageTheScratchsMoreMotion!Now,addthe“turn15degrees”blocktotheotherblockofcode.Whenyouseethewhitebarbetweenthe2blocksofcode,youcanreleaseyourmouse.Thatwhitebarmeansthatthe2blockswill“snap”ontotheotherblock.37ppt課件MoreMotion!Now,addthe“turnMoreMotion!Again,youcanchangethenumberofdegreesbydoubleclickinginthatareaandtypinginthenumberofdegreesyou’dlikeyourspritetorotate.Doubleclickontheblockstoseeyourspritemoveandrotate!38ppt課件MoreMotion!Again,youcanchaExperimentWithMotion!We’veonlyused2oftheblocksintheMotioncategory.Forthenextfewminutes,IwantyoutoexperimentwithalloftheotherblocksintheMotioncategory.Ifyou’dliketoseewhatablockdoes,rightclickontheblockandthenclickonhelp.YoucandeletecodeeasilybyjustdraggingitfromtheScriptarea!Havefun!39ppt課件ExperimentWithMotion!We’veoControl!ThenextcategoryofprogrammingbuttonswewillexperimentwithistheControlcategory.Thisisaveryimportantcategorybecauseitcontrolshowmanytimesaneventhappens,howlonganeventhappens,orwhenaneventhappens.40ppt課件Control!ThenextcategoryofpControl!ThefirstblockI’dlikeustouseisthe“whenflagclicked”block:Dragthisblockout,andsnapitontopoftheblocksyoualreadyhaveinyourscript.41ppt課件Control!ThefirstblockI’dliControl!Now,insteadofhavingtodoubleclickonyourblockofcode,youcanjustclickontheflagicontoplayyouranimation!Clickheretostart42ppt課件Control!Now,insteadofhavingPresentationModeWhenyouclickonthepresentationmodebutton,youranimationwillfillthewholescreen!Toexitpresentationmode,clickthearrowinthetopleftofthescreen,orjustpresstheEsckey.43ppt課件PresentationModeWhenyouclicBacktoControl!OtherpowerfulblocksintheControlcategoryaretheblocksthathandleconditionalstatements.Conditionalstatementsarecommonlycalled“ifstatements”or“if-elsestatements”.44ppt課件BacktoControl!OtherpowerfulConditionalStatementsThiscodemeansthatiftheuserpressestheSpacekeyonthekeyboard,thespritewillmove10steps.45ppt課件ConditionalStatementsThiscodSensing!Theconditionalstatementsmustbeusedalongwiththesensingblocks.(Noticetheshapeofsomeofthesensingblocks.Theyaretheonesthatwillfitinsidethe“condition”sincetheyhave6sides)46ppt課件Sensing!TheconditionalstatemBacktoControl!Forthenextfewminutes,experimentwiththeblocksinMotion,Control,andSensing.Rightclickonablockandselecthelptogetinformationaboutablock.Whenyougetsomethingcool,I’dliketoseeit!47ppt課件BacktoControl!ForthenextfSound!Now,let’saddsomesoundtoouranimation!Therearemanydifferentwaystogetsoundinyouranimation.Thefirstwaywe’regoingtoexperimentwithisbyimportingasoundfromtheScratchsoundlibrary.48ppt課件Sound!Now,let’saddsomesounImportingSoundFromTheScratchSoundLibraryClickonthespriteyouwanttohavesound.ClickontheSoundstabandselectImport.49ppt課件ImportingSoundFromTheScratScratchSoundLibraryYouwillseedifferentcategoriesofsoundsthatyoucanuseinyouranimationthatareavailableforyouintheScratchlibrary.50ppt課件ScratchSoundLibraryYouwillInsertingSoundOnceyoufindasoundthatyoulike,selectitandclickonOK.Youwillseethesoundyoujustselectedshowupunder“NewSound”.51ppt課件InsertingSoundOnceyoufindaPlayYourSoundIfyouclickonthe“Play”button,youcanpreviewyoursound.52ppt課件PlayYourSoundIfyouclickonAddingTheSoundToYourAnimationNow,you’rereadytoaddthesoundtoyouranimation!ClickontheScripttab.Selectthespriteyouwanttohavesound.NowselecttheSoundbutton.53ppt課件AddingTheSoundToYourAnimaAddingSoundNow,selectoneoftheblocksthatsays,“playsound…”Selectyoursoundfromthedrop-downmenubyclickingonthetrianglenextto“pop”.54ppt課件AddingSoundNow,selectoneofRecordingaSoundClickontherecordbuttontorecordasoundClickontheredbuttontostartrecordingClickonthesquaretostopYoucanrenamethesoundbytypingoverthename55ppt課件RecordingaSoundClickontheIncorporateSoundIntoYourAnimation!WhenIclicktheflag,mybeewillmoveandbuzz.56ppt課件IncorporateSoundIntoYourAnTimeToPlay!Forthenextfewminutes,experimentwithMotion,Control,Sensing,andSound!Whenyougetsomethingcool,letmeseeit!57ppt課件TimeToPlay!ForthenextfewUsingThePen!WhenusingthePentools,yourspriteactuallybecomesyourwritinginstrument!YoucanchangethePen’scolor,itsshade,anditssize.58ppt課件UsingThePen!WhenusingthePUsingthePen!YourfirstPenchallengeistowriteyourinitialsusingthePentools.Itmaysoundeasy,but,youhavetoremembertoliftyourpenwhennecessaryandalsotoputitbackdown!59ppt課件UsingthePen!YourfirstPencPenChallenge#2GreatjobwithPenChallenge#1!YoursecondPenChallengeistousethetoolstocreateaninterestingdesign.RememberthatyoucanchangePencolorandshade!60ppt課件PenChallenge#2GreatjobwithNumbers!TherearemanyanimationeffectsyoucancreateusingNumbersinScratch.Oneeffectisrandommovementofasprite!61ppt課件Numbers!TherearemanyanimatiRandomMovementRememberthattheScratchanimationareais480pixelswideand360pixelshigh.Thatmeansthattherangeonthehorizontalaxisisfrom-240to240.Therangeontheverticalaxisis

-180to180.62ppt課件RandomMovementRememberthattRandomMovementThisistheblockofcodeIwoulduseifIwantedmyspritetorandomlyglidetheentirehorizontalandverticaldistanceofmyScratchanimationarea:63ppt課件RandomMovementThisisthebloNumbers!Forthenextfewminutes,experimentwiththetoolsinMotion,Control,Sensing,Sound,andNumbers.Clickrightonablockandselecthelptoseewhatitdoes.Whenyougetsomethingcool,letmeseeit!64ppt課件Numbers!ForthenextfewminutVariables!Variablesareusedmainlyinthedevelopmentofgames.OpensomeoftheexamplesinProjects>Gamestoseehowvariablesareusedtokeepscoreinagame.65ppt課件Variables!VariablesareusedmTimeToHaveFun!Nowit’stimeforyoutocreateyourownoriginalanimationsorgames!Eachtablehasasetof12laminatedcardswithdifferentprojectsthatyoucantry,togiveyouideasforyourownanimation.66ppt課件TimeToHaveFun!Nowit’stimeLearnHowTo:Whileyou’recreatingyourownScratchanimation,Iwantyoutodiscoverhowto:Createyourownsprite;Createyourownbackground;67ppt課件LearnHowTo:Whileyou’recreaLastSlide!Rememberto:Beappropriate;Becreative;Havefun!YouwillalsobegivenaScratchHelpGuide,completewithscreenshotstohelpyougetstarted.68ppt課件LastSlide!Rememberto:68ppt課件認識Scratch!DongJun

Feb201769ppt課件認識Scratch!DongJun

Feb20171p舞臺區70ppt課件舞臺區2ppt課件我來試一試1-1在舞臺上移動鼠標，觀察（x,y）坐標值的。如果鼠標超出了舞臺的邊緣，數值發生什么變化？71ppt課件我來試一試1-1在舞臺上移動鼠標，觀察（x,y）坐標值的。3我來試一試1-272ppt課件我來試一試1-24ppt課件舞臺背景區-試一試嘗試使用圖庫新建一個背景自己繪制一個背景打開一個文件作為背景利用攝像頭拍一張圖片作為背景73ppt課件舞臺背景區-試一試嘗試使用圖庫新建一個背景5ppt課件角色區-試一試嘗試使用圖庫新建一個角色自己繪制一個角色打開一個文件作為角色利用攝像頭拍一張圖片作為角色74ppt課件角色區-試一試嘗試使用圖庫新建一個角色6ppt課件探索積木區動作區外觀區偵測區聲音區事件區控制區畫筆區75ppt課件探索積木區動作區7ppt課件外觀顏色1-276ppt課件外觀顏色1-28ppt課件乒乓游戲第一步：準備背景第二步：加入乒乓和球板第三步：讓角色動起來乒乓球(角度方向，隨機值（向下（-45,45）向上（135,225）））球板（跟隨鼠標的x）77ppt課件乒乓游戲第一步：準備背景9ppt課件78ppt課件10ppt課件WhatisScratch?Scratchisafreeprogrammabletoolkitthatenableskidstocreatetheirowngames,animatedstories,andinteractiveartandsharetheircreationswithoneanotherovertheInternet.79ppt課件WhatisScratch?ScratchisafWhatisScratch?ScratchbuildsonthelongtraditionofLogoandLEGO/Logo,buttakesadvantageofnewcomputationalideasandcapabilitiestomakeiteasierforkidstogetstartedwithprogramming(loweringthefloor)andtoextendtherangeofwhatkidscancreateandlearn(raisingtheceiling).80ppt課件WhatisScratch?ScratchbuildsWhatisScratch?Theultimategoalistohelpkidsbecomefluentwithdigitalmedia,empoweringthemtoexpressthemselvescreativelyandmakeconnectionstopowerfulideas.81ppt課件WhatisScratch?TheultimategWhatisScratch?ScratchisbuiltontopoftheSqueakenvironmentdevelopedbyAlanKayandcolleagues.82ppt課件WhatisScratch?ScratchisbuiWhatisScratch?ScratchisbeingdevelopedbytheLifelongKindergartenresearchgroupattheMITMediaLab,incollaborationwithKIDSresearchgroupattheUCLAGraduateSchoolofEducation&InformationStudies.83ppt課件WhatisScratch?ScratchisbeiLet’sGetStarted!ToOpenScratch,double-clickontheScratch(cat)iconorclickonScratch.exe84ppt課件Let’sGetStarted!ToOpenScraGettingStartedWithScratchOnceyou’veopenedScratch,youshouldseethisdefaultscreen:85ppt課件GettingStartedWithScratchOnWatchaQuickIntroductiontoScratch!86ppt課件WatchaQuickIntroductiontoLet’sLookAtSomeScratchExamplesGotoOpen>ProjectsandchoosethecategoryAnimationLookthroughthemandseewhatyouwillbeabletodoinScratch!(Someofthesehavesound.Pleasebeconsiderateofyourneighborsandturnthesounddownonyourcomputers!Askyourteachertohelpyouifyoudon’tknowhow.)87ppt課件Let’sLookAtSomeScratchExaChooseYourSprite!Youwillnoticethatthedefaultspriteisanorangecat.(Aspriteisasmallgraphicthatcanbemovedindependentlyaroundthescreen,producinganimatedeffects.)YoucanchooseadifferentspritetoprogramfromalibraryinScratch,oryoucandrawyourown!Youwillcreateyourownspritelater.88ppt課件ChooseYourSprite!YouwillnoChooseYourSprite!TochooseaspritefromtheScratchlibrary,clickontheFolderwithaStaricon.Whenyouhoveryourmouseoverit,itwillsay“Choosenewspritefromfile”.89ppt課件ChooseYourSprite!TochooseaChooseYourSprite!Openthefoldersofthedifferentcategoriesofsprites.Chooseonethatyou’dliketoexperimentwithbydoubleclickingonit.Youcanhavemorethanonespriteinyouranimation!90ppt課件ChooseYourSprite!OpenthChooseYourSprite!Onceyouhaveaspritethatyou’dliketoprogram,youcandeletetheorangecatspritebyclickingthescissoriconandclickingonthecat!Makesurethatyouclickonthearrowiconbeforeyoudoanythingelse–otherwise,you’lldeletesomethingthatyoureallywanted!Youcanalsorightclickontheicontodeletethatsprite91ppt課件ChooseYourSprite!OnceyouhaResizeYourSprite!Youcanmakeyourspritelargerorsmallerbyusingthe“growsprite”or“shrinksprite”icons.Youclickononeoftheseicons,thenclickonyourspriteuntilitisthesizeyou’dlike.92ppt課件ResizeYourSprite!YoucanmakChooseYourBackground!Rightnow,youhaveaplain,whitebackground–boring!YoucanalsochangeyourbackgroundbychoosingonefromtheScratchlibraryorcreatingyourown!93ppt課件ChooseYourBackground!RightnChooseYourBackground!ClickontheStage:Now,selectthe“Backgrounds”tab!94ppt課件ChooseYourBackground!ClickoChangeYourBackground!Youcanexperimentwithcreatingorimportingyourownbackgroundlater,but,forrightnow–chooseonefromthelibrarybyselectingImport.95ppt課件ChangeYourBackground!YoucanChangeTheBackground!

Fromthisscreen,youcanchooseoneofthecategoryfolders,andselectabackgroundthatyoulikebydoubleclickingonit!96ppt課件ChangeTheBackground!FromNow,We’reReadytoProgram!Now,youshouldhaveaspriteandabackgroundthatyou’dliketoworkwith!97ppt課件Now,We’reReadytoProgram!NoProgrammingInScratch!Thefirstthingyouneedtodoistoclickonthespriteyouwanttoprogram,andselectthe“Scripts”tab.Sinceyourspriteistheonlythingthatcanbeanimated,makesureyouhaveitselected.TheScriptsareaiswhereyou“build”yourprogrambyusingtheprogrammingblocks.98ppt課件ProgrammingInScratch!ThefirProgrammingInScratch!Intheupper,left-handcornerofyourScratchwindow,youwillsee8buttons.Eachofthesebuttonshaveprogrammingblocksinthoseparticularareas.WewillfirstexperimentwiththeMotionblocks.99ppt課件ProgrammingInScratch!IntheMotion!Whenyouclickonthemotionbutton,youwillseetheprogrammingblocksthatcanbeusedwithyoursprite.Let’sallprogramourspriteswiththesamecodefirst,andthenyou’llbeallowedtoexperimentonyourown!100ppt課件Motion!WhenyouclickonthemMotion!Dragoutthe“move10steps”block.Changethe“10”to“50”byclickingintheblockandtypingin50.Toseeyourspritemove50pixelstotheright,doubleclickontheblockintheScriptarea.Cool,isn’tit?!101ppt課件Motion!Dragoutthe“move10sMotionYoucanalsosetthemotionblocktomoveanegativenumberofpixelsbytypinganegativenumberintheblock.Thiswillmoveyourspritethatnumberofpixelsintheoppositedirection.102ppt課件MotionYoucanalsosetthemotWhatIsAPixel?We’vebeentalkingaboutpixels–whatisapixel?Apixelisoneofthesmallunitsthatmakeupanimageonacomputerortelevisionscreen.Itisderivedfromthewordspictureandelementtomakepixel!

103ppt課件WhatIsAPixel?We’vebeentalTheScratchStageTheScratchstageis480pixelswideand360pixelshigh.-240240180-180104ppt課件TheScratchStageTheScratchsMoreMotion!Now,addthe“turn15degrees”blocktotheotherblockofcode.Whenyouseethewhitebarbetweenthe2blocksofcode,youcanreleaseyourmouse.Thatwhitebarmeansthatthe2blockswill“snap”ontotheotherblock.105ppt課件MoreMotion!Now,addthe“turnMoreMotion!Again,youcanchangethenumberofdegreesbydoubleclickinginthatareaandtypinginthenumberofdegreesyou’dlikeyourspritetorotate.Doubleclickontheblockstoseeyourspritemoveandrotate!106ppt課件MoreMotion!Again,youcanchaExperimentWithMotion!We’veonlyused2oftheblocksintheMotioncategory.Forthenextfewminutes,IwantyoutoexperimentwithalloftheotherblocksintheMotioncategory.Ifyou’dliketoseewhatablockdoes,rightclickontheblockandthenclickonhelp.YoucandeletecodeeasilybyjustdraggingitfromtheScriptarea!Havefun!107ppt課件ExperimentWithMotion!We’veoControl!ThenextcategoryofprogrammingbuttonswewillexperimentwithistheControlcategory.Thisisaveryimportantcategorybecauseitcontrolshowmanytimesaneventhappens,howlonganeventhappens,orwhenaneventhappens.108ppt課件Control!ThenextcategoryofpControl!ThefirstblockI’dlikeustouseisthe“whenflagclicked”block:Dragthisblockout,andsnapitontopoftheblocksyoualreadyhaveinyourscript.109ppt課件Control!ThefirstblockI’dliControl!Now,insteadofhavingtodoubleclickonyourblockofcode,youcanjustclickontheflagicontoplayyouranimation!Clickheretostart110ppt課件Control!Now,insteadofhavingPresentationModeWhenyouclickonthepresentationmodebutton,youranimationwillfillthewholescreen!Toexitpresentationmode,clickthearrowinthetopleftofthescreen,orjustpresstheEsckey.111ppt課件PresentationModeWhenyouclicBacktoControl!OtherpowerfulblocksintheControlcategoryaretheblocksthathandleconditionalstatements.Conditionalstatementsarecommonlycalled“ifstatements”or“if-elsestatements”.112ppt課件BacktoControl!OtherpowerfulConditionalStatementsThiscodemeansthatiftheuserpressestheSpacekeyonthekeyboard,thespritewillmove10steps.113ppt課件ConditionalStatementsThiscodSensing!Theconditionalstatementsmustbeusedalongwiththesensingblocks.(Noticetheshapeofsomeofthesensingblocks.Theyaretheonesthatwillfitinsidethe“condition”sincetheyhave6sides)114ppt課件Sensing!TheconditionalstatemBacktoControl!Forthenextfewminutes,experimentwiththeblocksinMotion,Control,andSensing.Rightclickonablockandselecthelptogetinformationaboutablock.Whenyougetsomethingcool,I’dliketoseeit!115ppt課件BacktoControl!ForthenextfSound!Now,let’saddsomesoundtoouranimation!Therearemanydifferentwaystogetsoundinyouranimation.Thefirstwaywe’regoingtoexperimentwithisbyimportingasoundfromtheScratchsoundlibrary.116ppt課件Sound!Now,let’saddsomesounImportingSoundFromTheScratchSoundLibraryClickonthespriteyouwanttohavesound.ClickontheSoundstabandselectImport.117ppt課件ImportingSoundFromTheScratScratchSoundLibraryYouwillseedifferentcategoriesofsoundsthatyoucanuseinyouranimationthatareavailableforyouintheScratchlibrary.118ppt課件ScratchSoundLibraryYouwillInsertingSoundOnceyoufindasoundthatyoulike,selectitandclickonOK.Youwillseethesoundyoujustselectedshowupunder“NewSound”.119ppt課件InsertingSoundOnceyoufindaPlayYourSoundIfyouclickonthe“Play”button,youcanpreviewyoursound.120ppt課件PlayYourSoundIfyouclickonAddingTheSoundToYourAnimationNow,you’rereadytoaddthesoundtoyouranimation!ClickontheScripttab.Selectthespriteyouwanttohavesound.NowselecttheSoundbutton.121ppt課件AddingTheSoundToYourAnimaAddingSoundNow,selectoneoftheblocksthatsays,“playsound…”Selectyoursoundfromthedrop-downmenubyclickingonthetrianglenextto“pop”.122ppt課件AddingSoundNow,selectoneofRecordingaSoundClickontherecordbuttontorecordasoundClickontheredbuttontostartrecordingClickonthesquaretostopYoucanrenamethesoundbytypingoverthename123ppt課件