简介:摘要:工程测量工作离不开计算机辅助设计软件,随着国产软件在技术进步,ZWCAD软件逐渐在工程测量工作中占据一席之地。但是与其配套的应用程序却并不丰富,能服务于工程测量工作的更是少之又少。本文通过2个应用程序的开发实例,着重探讨了基于Visual LISP工具开发ZWCAD工程测量应用程序的方法。
简介:2.3 VB访问数据库的方法 VB访问数据库的方法很多,而ODBC接口并不是VB访问数据库运行效率最高的方法,因此ADO通过其内部的属性和方法提供统一的数据访问接口方法
简介:<正>1.IntroductionFlaviusArrianusfromNicomediainBithyniaisregardedasaprimeexampleforthesuccessfulblendofRomanandGreekidentityinimperialtimes.Inhiswritings,heproudlypresentshimselfasaRomanofficialandGreekintellectual.1Bothpartsofhispolyvalentidentityservedhimaselementsofhissymboliccapital.2HisRomanpolitical-militarypersonacomplementedhisimageasa
简介:摘要lisp能大大提高工作效率,减少操作错误率并提高作业精度。通过自身工作实践,简单介绍下如何利用三角形原理用lisp将高程值转为可视化线段,完成地物立面方向在CASS中的平面转换。
简介:AnelectromagnetdesignsystemisdevelopedusingVisualC++languageandOpenGLtechnologytovisualizeparametric3Dmodel.Thesystemconsistsofprimarydesign,optimizationdesign,dynamicandstaticcharacteristics,andvisualsimulation.Allempiricalparametersandcurvesusedindesignprocessarestoredindatabase.Throughhuman-computerinteractions,anelectromagneticsystemcanbedesignedconvenientlywiththeresultsandcharacteristicscurvesdisplayedingraphicmodel.Usingthissystemcangreatlyshortentheprocessofproductdesign,andtheresultssatisfytechnicalrequirements.
简介:Inaerialrobots’visualnavigation,itisessentialyetverydiffculttodetecttheattitudeandpositionoftherobotsoperatedinrealtime.Byintroducinganewparametricmodel,theproblemcanbereducedfromalmostunmanageabletobepartlysolved,thoughnotfully,aspertherequirement.Inthisparametricapproach,amulti-scaleleastsquaremethodisformulatedfirst.Bypropagatingaswellasimprovingtheparametersdownfromlayertolayeroftheimagepyramid,anewglobalfeaturelinecanthenbedetectedtoparameterizetheattitudeoftherobots.Furthermore,thisapproachpavesthewayforsegmentingtheimageintodistinctparts,whichcanberealizedbydeployingaBayesianclassifieronthepicturecelllevel.ComparisonwiththeHoughtransformbasedmethodintermsofrobustnessandprecisionshowsthatthismulti-scaleleastsquarealgorithmisconsiderablymorerobusttonoises.Somediscussionsarealsogiven.
简介:在VisualFoxPro中,可通过调用Foxtools.fll中的_WOdTop()和_WhnHwnd()两个例程来为AH函数SetWindowRgn()获取窗口句柄,用API函数中的CreateRoundRectRgn(),CreateEllipticRgn()、CreatePolygonRgn()设定显示区域的方法来实现异形表单的制作.
简介:Thetheoreticalframeworkofvisualsimulationinvirtualrealityisdiscussed.Thenewconceptofvisualimagespaceissupposed.Onthebasisofvisualimagespace,invisualperceptivesense,VRisconsideredasaspatialsimulation.Theobjectiveofthespatialsimulationistotransformphysicalspacetovisualimagespace.Last,theprototypesystem,surveying&mappingvirtualReality(SMVR),isdeveloped,andthespacesimulationaboveisrealized.ByuseofSMVR,thereal3Drepresentation,3Dvisualanalysis,virtualplananddesignscanbeimplemented.