虛擬環(huán)境鼠標(biāo)三維操作的研究與實現(xiàn).pdf

1、首都師范大學(xué)碩士學(xué)位論文虛擬環(huán)境鼠標(biāo)三維操作的研究與實現(xiàn)姓名：姚延嗣申請學(xué)位級別：碩士專業(yè)：計算機應(yīng)用技術(shù)指導(dǎo)教師：劉金剛20070604AbstractAbstractFirstIdiscussthemousepickalgorithminOpenGLandfindoutthemeaningofdatainthebuffer1willanalysiswhyOpenGLstorethedatainallunnermalwaySecond

2、，1willraiseamousepickingalgorithmbasedonOpenGLItreducesthecomplexoftheintersectionjudgementbetweenapoiTltanda3DobjectfromthreedimensiontoorredimensionThisalgorithmcreatsa3DcursorinvirtualenvironmentitcaIlmovearoundfreely

3、in3DspaceCompariedwiththetraditional2Dcursorthe3DC1Lrsorcallmoveatfightangl∞totheSCTCCTIandreflecttheperspectiveprojectionnaturelyThealgorithmwilljudgewhetherthehotpointof3D6xll“sorinthespaceofthetargetobject，andsettheob

4、jocttobepickedstateifthehotpointinthespaceoftheobjectIalsodesignallexperimenttotesttheeTrorAndIbalancetheprecisionandfacilityofthealgorithmwhenitisappliedtouserinterfaceTheerrorhasarelationshipwithmousestep，thenicestepma

5、kethecursormoveslowlyandthelargestepmakethe硯lrsorpenetratetheobjectwhich，however，willnotbereconginedaspickedupAtlast，thealgorithmisimprovedtomeetthissituationThepaperalsodiscussestheoperationofthe3DnlrsorUserCanmovethemo

6、uscpress／unpresstheright／leftbuttonandrotatethewheeltocontrolthe3DcursorItprovidsthreefeedbackstates，pointed，atteched，andselectedtouserA3DvirtualenvironmentisdevelopedtoapplythismousepickingalgorithmItcontainssceneandobj

7、ectThepaperdiscusseshowtodesignthescene；itincludestheattributes，operationsandrenderingThepaperalsoexplainsthatwhytheobjectshouldregisttothesceneandhowTherearethreewaystoassignlittleidtoeachobjectinascuttle，and1willanalys

8、eswhichisthebestoneThedoormodelisdesignedtotriggertheswitchbetweendifferentSCenesComputermodelisdesignedtolaunchtheapplicationsCameraisdesignedtoaminthevirtualenvironmentAndthe3Dpopupmenuisdesignedtoapplyseveralcommandst