1、MultipleMonitorsinFlightGear:QuickandDirtyTableofcontentsIHtllIIJ=d，laJK<B-IJdla-4faAIGHdJiaIaL-InIalaA4,LBifl-&AJJfI|&<mK1aKIJ-1<*!<!<I&IJh-IJla-|_ALhLJn.1caIKILLJLIPiziKmvhcmuftiHirsLii+卜卜“USim(henutter事ithniiHvcFdjiL，g，財“一，哥3土“-2Stmiu!«ljivcwithMrtitint!"-naii

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4、;iNITrhBS><r-i<4r4bri!e99<i-al*!iei"r-i-rI-bMIFr-TTI-HTAi-gpFTr+ATI-rNetwork.心«一-“5“一7SumniaryLawMa.undidkicumcioiinhirnwiEKMrKIntroductionItj-lhjtulikeits,Mminii心tmedwcquLipmcnland滬心myupMiiHiipknuHvikiFxfiirnigfuGcmpcniujiifniihBuiyoumigliL血wgoddas»u»rinwiiioflUHipum

5、、也xlmojiitDr&tluieyoucnseiupnow皿themforasth>ntime.Thisha.quickunddirtygunli：fiirsellingupmulLipIcriMHiitUKKforFligbtriedrinju-t-IvuinmijickPositionthemonitorsAligningtheimageswillbemucheasierifyoufollowtheseguidelines:Keepthescreensvertical(nottilted.Raiseorlowereachmonitorsothattheircentersa

6、realignedhorizontally(Fig.1.Placethemonitorsateyelevel.Positionallthescreensthesamedistancefromyoureyes.Aimallthemonitorsdirectlyatyoureyes.Inotherwords,yourlineofsightshouldbeperpendiculartothefaceofthemonitorimage.Fig1.AlignhorizontallyoncenterStartthemasterwith-native-fdmThe“master”computeriswhic

7、heveroneyoudesignatetocomputetheflightdynamicsmodel(FDMforthenetwork.Forthistutorial,we'lldesignatethecomputerattachedtothemonitorinfrontandcenterasthemaster.The-native-fdmoptiontellsthemastertosenditsFDMresultstoanothercomputer.Theformis-native-fdm=socket,out,60,IPofslave,5500,udpAddoneoftheseo

8、ptionsforeachslavecomputer.The60referstothenumberoftimespersecondthatthemasterwillsendupdatedFDMinformationtotheslave.The5500istheUDPportnumbertouse.ThisoptioncanbesetintheGUIlauncherbyclickingAdvanced>Input/Output.Startaslavewith-fdmand-native-fdmStarteachslavewiththeseoptions:-fdm=external-nati

9、ve-fdm=socket,in,60,5500,udpNotethedoublecomma-noIPaddressneedstobespecified.The60referstotherateatwhichtheslaveshouldexpecttoreceiveFDMupdatesfromthemasterandshouldmatchthecorrespondingfieldofthemaster's-native-fdmoption.The5500istheUDPportnumbertouse.TheseoptionscanbesetintheGUIlauncheratAdvan

10、cedFlightModelandAdvanced->Input/Output.ScaleslaveIfallyourscreensarethesamephysicalsize,skiptothenextsection.Ifyourslaveandmastermonitorsaredifferentsizes,youneedtoscaletheimagesdisplayedonthescreenstoapproximatelythesamephysicalsize.Ifyourmastermonitorisalreadysettoareasonablefieldofview,don

11、9;tchangeit.Usethex/Xkeyontheslavetozoomitsdisplayinoroutsothatitsimageisthesamephysicalscaleasthemaster.Forexample,usearulertophysicallymeasurethedistancebetweentwoarbitraryinstrumentsontheinstrumentpanel,thenzoomtheslavesothatthedistancebetweenthesametwoinstrumentsisthesame(Fig.2.Fig2.Scaletothesa

12、mesizeMakenoteoftheresultingfieldofviewsothatyoucanputitonthecommandlinenexttimeandnothavetorepeatthisstep.Thenewfieldofviewbrieflyshowsonthedisplaywhenyouzoominorout.Thecommandlinetousethefutureis:-fov=degreesGUIuserscanalsoenterthefieldofviewinAdvanced>Rendering->FOV.PanslaveIfyou'vefoll

13、owedthesuggestionssofar,thenthisfinaladjustmentwillbemagicallysimple.Right-clickthemousetogetintopanviewmode(wherethecursorbecomesadoubleheadedarrow.Avoidpanningupordown.Justpanrightorlefttowheretheimageshouldbe.Youmightwanttopositionyouraircraftonapavedrunwayinpreparationforthisadjustment.Taxialitt

14、ledistancesothatthedistinctrunwaymarkingsappeartobecontinuousfromonedisplaytotheother,asifthemonitorswerewindows.Weavearoundabitandcheckthattherunwaymarkingsflowfromonescreentoanotherasyouwouldexpect.Afteryouestablishthecorrectviewangle,youcanavoidhavingtodothisstepinthefuturebyspecifyingtheangleont

15、hecommandline.UnliketheFOV,thepanangledoesn'tappearonthescreenwhenyouchangeit.Youcandiscoveryourcurrentpananglebybrowsingtheinternalpropertytreeat/sim/view/config/headingoffset-deg.Thecommandlineformattouseinthefutureis:-prop:/sim/view0/config/heading-offset-deg=degreesUsenegativeoffsetstolookto

16、theright,positiveoffsetstolookleft.GUIusersareoutofluck(theAdvanced->Rendering->ViewOffsetsettingandthe-view-offsetcommandlineoptionevidentiallydosomethingelse.ImprovementsandvariationsBestFOVThefieldofview(FOVinasingle-monitorsetupisflexible.Yourbrainunderstandswhatyoureyesseeacrossawiderange

17、ofFOVsettings.Whenyouaddasecondorthirdmonitor,youaremorelikelytonoticedistortionsfromanincorrectlychosenFOVcompoundedacrossmultiplescreens.There'saquickanddirtymethodtodeterminethecorrectFOVifyourmonitorsareimmediatelyadjacenteachotherwithlittleornovisualgapbetweenscreens.Measureorestimatetheang

18、lefromyoureyestotheleftmostandrightmostedgesoftheoverallimage(Fig.3.Dividebythenumberofmonitors.ZoomFig3.FieldofviewStepoutsidethecockpit150oTotalFOV=150oEachmonitorFOV=1503=50oAfteryouselectanewvieworigin,makeanoteofthethreevaluesintheviewlocationGUIsothatyoucanspecifythesevaluesonthecommandlineint

19、hefutureandnothavetorepeatthisexercise.Theformatis:-prop:/sim/view0/config/x-offset-m=meters-prop:/sim/view0/config/y-offset-m=meters-prop:/sim/view0/config/z-offset-m=metersUsepositiveXvaluestomoveyourviewpointtotheright,positiveYoffsetstomovehigher,andpositiveZoffsetstomoveaft.StereoscopicflyingUs

20、ingtheviewlocationadjustmentdescribedintheprevioussection,youcanviewtheworldinthreedimensions.Placetwomonitorssidebysideasclosetogetheraspossible.Shiftthevieworiginofonetotheleft,andtheothertotheright,fortheeffectasshowninFigs.5aand5b.Fig5a.RemotePeruvianAndesinstereo,forcrosyedviewingFig5b.RemotePe

21、ruvianAndesinstereo,fornon-ross-eyedviewingTroubleshootingFlightModelIfthemasterdisplayshowsaninstrumentpanelbutnoscenery,verifythatoption-fdm=externalisnotonthecommandlineorinanyconfigurationfile.IntheGUIlauncher,verifythatAdvanced->FlightModelisnotsettoexternal.Ifaslavestartsupinadifferentparto

22、ftheworldorotherwiseseemstorunindependentofthemaster,verifythattheslaveusestheoption-fdm=external.AnglesIfyoujustcan'tgettheimagestomatchupinitiallyortoremainalignedasyoupitchandrollyouraircraft,thencheckthatyoubeganyouralignmentprocedurewiththefrontcenterdisplaysettoviewdirectlyforwardwithnopit

23、ch.Youcanmovethefrontdisplaydirectlyrightorleftwithnoproblem,butanymovementupordownwillmakeithardertoalignthedisplaysonthesides.AlsocheckthatyoubeganyouralignmentprocedurewiththecenterdisplaysettothecorrectfieldofviewJt'easytosetthecenterdisplaytoafieldofviewtoowide,whichthenstrainstheforgivingg

24、eometryofourquick-and-dirtyapproach.RenderingIftheterrainlooksdifferentonthemasterandslave,orifrunwaysorotherobjectsappeardifferent,checkthatthemasterandslaveusethesamesceneryandobjectsdata.Thisisgenerallyanythingatorbelow$FG_ROOT/data/andat$FG_SCENERY.Thesedirectoryhierarchiescanbereplicatedlocally,orsharedatacommonnetworklocation.Ifthemasterandslaveshowdifferentcloudlayers,ordifferentvisibility,orpositionofthesun,orappeardifferentinotherways,checkthatthemasterandslaveusethesameorcompatibleoptions.Ifthecommandlinesappeartobethesame,checkforoptionsinallthepossibleconfigurationfilessuchasprefe