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1、基于Flash的谐振电路的分析与实现外文原文：WhatisFIashFlashisanauthoringtoolthatletsdesignersanddeveloperscrcatepresentations,applications,andothercontentthatenablesuserinteraction.Flashprojectscanincludesimpleanimations,videocontent,complexpresentations,applications,andeverythinginbetween.Ingener
2、al,individualpiecesofcontentmadewithFlasharecal1edapplications,eventhoughtheymightonlybeabasica’nimation.Youcanmakemedia-richFlashapplicationsbyincludingpictures,sound,video,andspecialeffects.FlashisextremelywellsuitedtocreatingcontentfordeliveryovertheInternetbecauseitsfilesar
3、everysmall.Flashachievesthisthroughitsextensiveuseofvectorgraphics.Vectorgraphicsrequiresignificantlylessmemoryandstoragespacethanbitmapgraphicsbecausetheyarcrepresentedbymathematicalformulasinsteadoflargedatasets.Bitmapgraphicsarelargerbecauseeachindividualpixelintheimagerequi
4、resaseparatepieceofdatatorepresentit.Tobui1danapplicationinFlash，youcreategraphicswiththeFlashdrawingtoolsandimportadditionalmediaelementsintoyourFlashdocument.Ncxt，youdefinehowandwhenyouwanttouseeachofthoseelementstocreatetheapplicationyouhaveinmind.WhenyouauthorcontentinFlash
5、,youworkinaFlashdocumentfile.Flashdocumentshavethefileextension.fla.AFlashdocumenthasfourmainparts:TheStageiswhereyourgraphics,video,buttons,andsoonappearduringplayback.TheTimelineiswhereyoutellFlashwhenyouwantthegraphicsandotherelementsofyourprojecttoappear.YoualsousetheTimeli
6、netospecifythelayeringorderofgraphicsontheStage.Graphicsinhigherlayersappearontopofgraphicsinlowerlayers.TheLibrarypaneliswhereFlashdisplaysalistofthemediaelementsinyourFlashdocument.ActionScriptcodeallowsyoutoaddinteractivitytothemediaelementsinyourdocument.Forexample,youcanad
7、dcodethatcausesabuttontodisplayanewimagewhentheuserclicksit.YoucanalsouseActionScripttoaddlogictoyourapplications.Logicenablesyourapplicationtobehaveindifferentwaysdependingontheuser"sactionsorotherconditions.FlashincludestwoversionsofActionScript,eachsuitedtoanauthor"sspecific
8、needs.FormoreinformationaboutwritingActionScript,seeLe
