计算机图形学常见问题1.docx

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计算机图形学常见问题1.docx

计算机图形学常见问题1

Archive-Name:

graphics/opengl-faq/part1

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Xref:

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comp.answers,comp.graphics.api.opengl,news.answers

Path:

senator-bedfellow.mit.edu!

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usc!

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swrinde!

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pho

From:

pho@（PaulHo）

Subject:

OpenGLFrequentlyAskedQuestions（FAQ）[1/3]

Message-ID:

Followup-To:

poster

Last-Modified:

1995September18

Summary:

ThiscontainsalistofFrequentlyAskedQuestionsaboutOpenGL（R）

Keywords:

FAQ,OpenGL

Sender:

pho@

Reply-To:

pho@

Organization:

SiliconGraphicsInc.

Posting-Frequency:

twiceamonth

Date:

Mon,2Oct199508:

00:

20GMT

Approved:

mailnews@

Viewmainheaders

Seereaderquestions&answersonthistopic!

-Helpothersbysharingyourknowledge

ThisFAQispostedtwiceamonth,onthe2nd,16thofeverymonth.

YoumayalsowanttoseetheOpenGLWebPage:

WWWURL

*marksrecentlymodifiedanswersornewquestions

TheFAQhasbeensplitinto3parts.

Part1aregeneralquestionsaboutOpenGLdocumentation,

implementations,licensing,andothergeneralproduct

information.Part2isaboutOpenGLgovernanceandtheARB.

Part3aretechnicalquestions,includingwheresourcecode

examplescanbefound.

Part1

Q1:

HowdoIsubmitchangesoradditionstothisFAQ?

Q2:

WhatisOpenGL?

Q3:

WhereareWorldWideWebsiteswithinformationaboutOpenGL?

Q4:

Whatdoesthe.glor.GLfileformathavetodowithOpenGL?

Q5:

WhatdocumentationisavailableforOpenGL?

（Abibliographyof

OpenGLdocumentsislistedhere.）

Q6:

WherecanIgettheOpenGLspecification?

Q7:

WhichvendorsarelicensingOpenGL?

*Q8:

WhatOpenGLimplementationsareavailable?

Part2

Q9:

WhoneedstolicenseOpenGL?

Whodoesn't?

Q10:

Whataretheconformancetests?

Q11:

WhatisSiliconGraphicspolicyon"free"

implementationsofAPIswhichresembletheOpenGLAPI?

Q12:

WhatisMesa3DandwherecanIgetit?

Q13:

Howdoesauniversityorresearchinstitutionacquireaccessto

OpenGLsourcecode?

Q14:

Howisacommerciallicenseacquired?

Q15:

HowistheOpenGLgoverned?

Whodecideswhatchangescanbemade?

Q16:

WhoarethecurrentARBmembers?

Q17:

WhatisthephilosophybehindthestructureoftheARB?

Q18:

HowdoestheOpenGLARBoperatelogistically?

Whendoesthe

ARBhavemeetings?

Q19:

HowdoadditionalmembersjointheOpenGLARB?

Q20:

SoifI'mnotamemberoftheARB,amIshutoutofthedecision

makingprocess?

Q21:

AreARBmeetingsopentoobservers?

Part3

Q22:

WherecanIfindOpenGLsourcecodeexamples?

Forinstance,whereisanexamplewhichcombines

OpenGLwithMotif,usingtheMotifwidget?

Q23:

HowdoIcontributeOpenGLcodeexamplestoapubliclyaccessible

archive?

Q24:

WhatistheGLUTtoolkit?

WheredoIgetit?

Q25:

WhatistherelationshipbetweenIRISGLandOpenGL?

IsOpenGLsourcecodeorbinarycodecompatiblewithIRISGL?

Q26:

WhyshouldIportmyIRISGLapplicationtoOpenGL?

Q27:

HowmuchworkisittoconvertanIRISGLprogramtoOpenGL?

Whatarethemajordifferencesbetweenthem?

Q28:

WhenusingXlib,howdoIcreateaborderlesswindow?

Q29:

HowdoIswitchbetweensinglebufferanddoublebuffermode?

Q30:

Onmymachine,itappearsthatglXChooseVisual

isonlyabletomatchdouble-bufferedvisuals.Iwanttohavemore

bitsofcolorresolution,sohowdoIrenderinsinglebuffermode?

Q31:

I'vegota24-bitmachine,butmyOpenGLwindows

arenotusingthefullcolorresolution.What'swrong?

programlooksfineononemachine,butthedepthbufferdoesn'twork

onanother.What'swrong?

Q32:

WhatinformationisavailableaboutOpenGLextensions?

Q33:

HowdoImakeshadowsinOpenGL?

Q34:

HowcanIuse16bitXfonts?

Q35:

What'sinthenewGLU1.2tesselator?

------

Subject:

Q1:

HowdoIsubmitchangesoradditionstothisFAQ?

Torequestchangesoradditions,pleasesende-mailto

theFAQmaintainer.Seethe"Reply-To:

"fieldintheheaderfor

thee-mailaddress.

OpenGLlicenseesmaywanttocontributeinformationtothe

question:

"WhatOpenGLimplementationsareavailable?

"That

spaceisavailableforanycompanywhowishestostatestatus

reports,releasedates,contactnamesandphonenumbers,orother

informationfortheirOpenGLimplementation.

Itisaskedthatthisinformationberelativelybrief.Also,for

thesakeofcivility,eachimplementorisaskednottomake

comparisonsoftheirimplementationsagainstothers.

NotethatalthoughaSiliconGraphicsemployeemaintainsthis

FAQ,SiliconGraphicsdoesnotspeakforanyothercompany,

nordoesitupholdtheveracityofanyoneelse'sinformation.

------

Subject:

Q2:

WhatisOpenGL?

OpenGL（R）isthesoftwareinterfaceforgraphicshardwarethatallows

graphicsprogrammerstoproducehigh-qualitycolorimagesof3D

objects.OpenGLisarenderingonly,vendorneutralAPIproviding2D

and3Dgraphicsfunctions,includingmodelling,transformations,

color,lighting,smoothshading,aswellasadvancedfeatureslike

texturemapping,NURBS,fog,alphablendingandmotionblur.OpenGL

worksinbothimmediateandretained（displaylist）graphicsmodes.

OpenGLiswindowsystemandoperatingsystemindependent.OpenGLhas

beenintegratedwithWindowsNTandwiththeXWindowSystemunder

UNIX.Also,OpenGLisnetworktransparent.Adefinedcommonextension

totheXWindowSystemallowsanOpenGLclientononevendor'splatform

torunacrossanetworktoanothervendor'sOpenGLserver.

------

Subject:

Q3:

WhereareWorldWideWebsiteswithinformationaboutOpenGL?

OpenGL--TheIntegrationofWindowingand3DGraphics

WWWURLhttp:

//hertz.eng.ohio-state.edu/~hts/opengl/article.html

MaintainedbyHarryShamansky.

OpenGLWWWCenter

WWWURL

MaintainedbyThomasMcReynolds.

IBMWWWCenterforOpenGL

WWWURL

TemplateGraphicsSoftwareWWWCenterforOpenGL

WWWURL

MicrosoftDeveloperNetworkOffRampWebServer

WWWURL

------

Subject:

Q4:

Whatdoesthe.glor.GLfileformathavetodowithOpenGL?

.glfileshavenothingtodowithOpenGL,butaresometimes

confusedwithit..glisafileformatforimages,whichhasno

relationshiptoIRISGLorOpenGL.

------

Subject:

Q5:

WhatdocumentationisavailableforOpenGL?

（AbibliographyofOpenGLdocumentsislistedhere.）

A2volumeset,TheOpenGLTechnicalLibrary（TheOpenGL

ProgrammingGuideandTheOpenGLReferenceManual）ispublished

byAddison-Wesley.TheISBNnumbersforbothEnglishand

Japaneseversionsarelistedbelow.Youcanpurchasethebooks

inextremelylargevolumebycallingAddison-Wesley（+1-617-944-3700）.

Whatfollowsisabibliographyofarticles,books,andpaperswritten

aboutOpenGL.

Books（inEnglish）

------------------

Neider,Jackie,TomDavis,andMasonWoo,OpenGLProgramming

Guide:

TheOfficialGuidetoLearningOpenGL,Release1,

Addison-Wesley,Reading,Massachusetts,1993（ISBN0-201-63274-8）.

OpenGLArchitectureReviewBoard,OpenGLReferenceManual:

The

OfficialReferenceDocumentforOpenGL,Release1,

Addison-Wesley,Reading,Massachusetts,1992（ISBN0-201-63276-4）.

Magazinearticles

-----------------

Bruno,Lee."GraphicsUsersDebateThreeHotTopics,"OpenSystemsToday,

December12,1994,p.HP3,HP8.

Bruno,Lee."SunContinuestoResistOpenGLTide,"OpenSystemsToday,

November28,1994,p.SF1,SF5-6.

Davis,Tom."MovingtoOpenGL,"IRISUniverse,Number25,

Summer,1993.

Deffeyes,SuzyandJohnSpitzer."OpenGLonOS/2,"OS/2DeveloperMagazine,

Nov/Dec94,pages34-45.

Glazier,Bill."The'BestPrinciple':

WhyOpenGLisemergingasthe3D

graphicsstandard,"ComputerGraphicsWorld,April,1992.

"Industrygrouppushing3-Dgraphicsstandard,"ComputerDesign,

July,1994,p.50,52.

Karlton,Phil."IntegratingtheGLintotheXenvironment:

highperformancerenderingextensionworkingwithandnotagainst

X,"TheXResource:

Proceedingofthe6thAnnualXTechnical

Conference,O'ReillyAssociates,Issue1,Winter,1992.

Kilgard,Mark,SimonHui,AllenLeinwand,andDaveSpalding.``X

ServerMulti-renderingforOpenGLandPEX,''TheXResource

Proceedingsofthe8thAnnualXTechnicalConference,O'Reily

andAssociates,Sebastopol,California,January1994.

Kilgard,MarkJ."OpenGL&X:

AnIntroduction,"TheXJournal.

November-December,1993,page36-51.

Kilgard,MarkJ."UsingOpenGLwithXlib,"TheXJournal.

January-February,1994,page46-65.

Kilgard,MarkJ."UsingOpenGLwithMotif,"TheXJournal.

July-August,1994.

"OpenGLProgramsaNewHorizonforSun,"SunWorld,January,1994,

page15-17.

Prosise,Jeff."Advanced3-DGraphicsforWindowsNT3.5:

IntroducingtheOpenGLInterface,PartI,"MicrosoftSystemsJournal,

October,1994,Vol.9,Number10,pages15-29.

Prosise,Jeff."Advanced3-DGraphicsforWindowsNT3.5:

IntroducingtheOpenGLInterface,PartII,"MicrosoftSystemsJournal,

November,1994,Vol.9,Number11.

Prosise,Jeff."UnderstandingModelviewTransformationsin

OpenGLforWindowsNT,"MicrosoftSystemsJournal,

February,1995,Vol.10,Number2.

Japaneselanguagemagazinearticlesandbooks

---------------------------------------------

"InterviewwithMasamichiTachiaboutOpenGL_Japan,"

NikkeiComputerGraphics,3/1995,p.56-57.

Matsumoto,Masayuki,PIXEL,"OpenGL,A3DGraphicsStandard",

10/1994,p.138-1

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