ModelingAlgorithmsFilletsandChamfers造型算法——倒圆与倒角[email protected]一、倒圆FilletConstructor1．BRepFilletAPI_MakeFillet使用类BRepFilletAPI_MakeFillet来为形状添加倒圆。倒圆是用光滑面来代替角边。使用方法如下： l首先，给定一个需要倒圆的形状； l然后，通过Add方法来添加描述倒圆的

本文通过将OpenCascade中的形状离散成网格数据后在OpenSceneGraph中显示，及使用OSG的快速法向osgUtil::SmoothingVisitor优化与使用OpenCascade来计算正确

在OpenSceneGraph中绘制OpenCascade的曲线Render [email protected]摘要Abstract

OpenCASCADECurveLengthCalculationeryar@163.comAbstract.Thenaturalparametricequationsofacurveareparametricequationsthatrepresentthecurveintermsofacoordinate-independentparameter,generallyarclengths,ins

[email protected]摘要Abstract：本文通过程序实例，将OpenCascade中的拓朴数据（边、面

[email protected]摘要Abstract：分析幂基曲线即多项式曲线在OpenCascade中的计算方法，以及利用OpenSceneGraph

OpenCascadePrimitivesBRep-Boxeryar@163.comAbstract.BRepisshortforBoundaryRepresentation.BoundaryRepresentationgivesacompletedescriptionofanobjectbyassociatingtopologicalandgeometricinformationforsolid

 OpenCASCADEMakePrimitives-Boxeryar@163.comAbstract.BymakingasimpleboxtodemonstratetheBRepdatastructureoftheOpenCASCADE.TheconstructionmethodisdifferentfromBRepPrimAPI_MakeBox.Inthepaperconstructthebo

关键字KeyWords：Netgen,nglib,MeshGenerator,OpenCascade,Triangulation一、引言IntroductionNETGEN是一个二维/三维自动网格剖分工具

[email protected]摘要Abstract：本文对网格数据结构作简要介绍，并结合使用OpenCascade中的数据结构，将网格数据在OpenSceneGraph

OpenCASCADERationalBezierCurveseryar@163.comAbstract.Althoughpolynomialsoffermanyadvantages,thereexistanumberofimportantcurveandsurfacetypeswhichcannotberepresentedpreciselyusingpolynomials,e.g.,circl

KeyWords.OpenCASCADE

[email protected] 关键字KeyWords：OpenCascade,LineAspect,LineType 在OpenCascade的显示模块中

OpenCascadeChineseTextRenderingeryar@163.comAbstract.OpenCascadeusesadvancedtextrenderingpoweredbyFTGLlibrary.TheFreeTypeprovidesvectortextrendering,asaresultthetextcanberotatedandzoomedwithoutquality

[email protected]摘要Abstract：本文通过OpenCascade的Tcl/Tk和ACIS的Scheme的对比来说明脚本语言在程序中的重要作用

[email protected]摘要Abstract：OpenCascade6.7.0中引入了光线跟踪算法的实现。

[email protected]摘要Abstract：表面上某一点的法向量（NormalVector）指的是在该点处与表面垂直的方向。对于平面，其上各点的法向是一样的，统一为这个平面的法向。对于曲面，各点具有不同的法向量。几何对象的法向量定义了它在空间中的方向，法向量是在进行光照处理时的重要参数。所以在显示造型算法离散曲面后的网格时，设置正

[email protected]摘要Abstract：介绍了三维数据交换格式STL的组成，以及OpenCascade中对STL的读写。

OpenCASCADEConictoBSplineCurves-Circleeryar@163.comAbstract.TheconicsectionsandcirclesplayafundamentalroleinCAD/CAMapplications.UndoubtedlyoneofthegreatestadvantagesofNURBSistheircapabilityofprecisely

OpenCASCADEMakePrimitives-Boxeryar@163.comAbstract.BymakingasimpleboxtodemonstratetheBRepdatastructureoftheOpenCASCADE.TheconstructionmethodisdifferentfromBRepPrimAPI_MakeBox.Inthepaperconstructthebox

OpenCASCADEMakePrimitives-Sphereeryar@163.comAbstract.ThesphereisthesimplesttopologyshapeoftheBRepstructure.Butthereareseveralimportconceptofthesphereedges,suchasdegeneratededgeandseamedge.Soconstruct

[email protected]    有网友反映blog中关于OpenCASCADE的文章比较杂乱，不太好找，最好能提供一个大纲，这样方便查找。

OpenCASCADEBRepvs.OpenNURBSBReperyar@163.comAbstract.BRepshortforBoundaryRepresentation.FirstgivethedefinitionoftheBRep,thencomparetheBRepmodebetweenOpenCASCADEandOpenNURBS.Thereare3mainrepresentation

OpenNURBStoOpenCASCADEeryar@163.comAbstract.TheOpenNURBSinitiativeprovidesCAD/CAM/CAEandcomputergraphicssoftwaredevelopersthetoolstoaccuratelytransfer3Dgeometrybetweenapplications.TheOpenNURBSC++sourc

OpenCASCADERoot-FindingAlgorithmeryar@163.comAbstract.Aroot-findingalgorithmisanumericalmethod,oralgorithm,forfindingavaluexsuchthatf(x)=0,foragivenfunctionf.Suchanxiscalledarootofthefunctionf.InOpenC

OpenCASCADEDataExchangeDWGeryar@163.comAbstract.DWGisafileformatcreatedinthe70’sfortheemergingCADapplications.CurrentlyitisthenativefileformatofAutoCAD,aproprietaryCADprogramdevelopedbyAutodesk.Libred

OpenCASCADEConictoBSplineCurves-Circleeryar@163.comAbstract.TheconicsectionsandcirclesplayafundamentalroleinCAD/CAMapplications.UndoubtedlyoneofthegreatestadvantagesofNURBSistheircapabilityofprecisely

OpenCASCADEConictoBSplineCurves-Hyperbolaeryar@163.comAbstract.RationalBezierCurvecanrepresentconiccurvessuchascircle,ellipse,hyperbola,.etc.ButhowtoconvertaconiccurvetoBSplinecurveisstillquestion,i.e

OpenCASCADEConictoBSplineCurves-Parabolaeryar@163.comAbstract.RationalBezierCurvecanrepresentconiccurvessuchascircle,ellipse,hyperbola,.etc.ButhowtoconvertaconiccurvetoBSplinecurveisstillquestion,i.e.

BuildingOpenCASCADEonDebianeryar@163.comAbstract.WhenyouarefamiliarwithOpenCASCADEonWindows,youshouldtryitonLinuxoperatingsystem,becauseofDebianisalsoopensourcelikeOpenCASCADE.Thepaperisfocusonhowtobu

[email protected]是OpenCASCADE用于Linux操作系统测试的专用系统。这几天下载安装了Debian系统，体验了一下，感觉还不错：简洁，精致。

由于在openCascade推荐使用的发行版列表中，对Ubuntu比较熟悉，所以选用ubuntu。

comAbstract.UsetheDrawTestHarnesstotesttheperformanceofOpenCASCADEbyTclscripts.Fromthetestresult,youwillcheckwhethertheOpenCASCADEmeetyourneed.KeyWords.OpenCASCADE

OpenCASCADEColorScaleeryar@163.comAbstract.Thecolorscaleisaspecializedlabelobjectthatdisplaysacolormapandanaccompanyingnumericalscaleforcolormappedorcontourdataplots.AsthegeometrymodelingkernelofSALOM

OpenCASCADERationalBezierCurveseryar@163.comAbstract.Althoughpolynomialsoffermanyadvantages,thereexistanumberofimportantcurveandsurfacetypeswhichcannotberepresentedpreciselyusingpolynomials,e.g.,circl

OpenCASCADEGaussIntegrationeryar@163.comAbstract.Numericalintegrationistheapproximatecomputationofanintegralusingnumericaltechniques.Thenumericalcomputationofanintegralissometimescalledquadrature.Them

OpenCASCADEDocumentationSystemeryar@163.comAbstract.DoxygenisthedefactostandardtoolforgeneratingdocumentationfromannotatedC++sources,butitalsosupportsotherpopularprogramminglanguages.Youcanalsousedoxy

OpenCASCADECurveLengthCalculationeryar@163.comAbstract.Thenaturalparametricequationsofacurveareparametricequationsthatrepresentthecurveintermsofacoordinate-independentparameter,generallyarclengths,ins

经常会遇到要求点到曲线的距离的问题，在运用opencascade计算点到曲线和曲面的距离常用的两个类是：Extrema_ExtPC， Extrema_ExtPS一般做法是先构造曲线特征：（构造了Wire

OpenCascadeChineseTextRenderingeryar@163.comAbstract.OpenCascadeusesadvancedtextrenderingpoweredbyFTGLlibrary.TheFreeTypeprovidesvectortextrendering,asaresultthetextcanberotatedandzoomedwithoutquality

如在OpenCascade中经常看到如下类似的代码：TopoDS_Shape theSphere = BRepPrimAPI_MakeSphere(1.0);其中，BRepPrimAPI_MakeSphere

OpenCascadeDrawTestHarnesseryar@163.comAbstract.DrawisacommandinterpreterbasedonTcl/TkandagraphicalsystemusedtotestanddemonstrateOpenCascademodelinglibraries.Itprovidesaflexibleandeasytousemeansoftest

离散工作比较简单，opencascade里面的brepmesh直接支持将topoDS_shape类型的模型按照设置的精度要求离散成三角网格。

OpenCascadeB-SplineBasisFunctioneryar@163.comAbstract.B-splinesarequiteabitmoreflexiblethanBeziercurves.Thisflexibilitycomesfromthefactthatyouhavemuchmorecontroloverthebasisfunctions.ForBeziercurvesth

OpenCascade[email protected] Keywords:OpenCascade6.7.1,Qt5,Demo 从OpenCascade6.7.0开始图形显示的初始化部分有较大改动

OpenCascadeEigenvaluesandEigenvectorsofSquareMatrixeryar@163.comAbstract.OpenCascadeusetheJacobimethodtofindtheeigenvaluesandtheeigenvectorsofarealsymmetricsquarematrix.Useclassmath_Jacobitocomputesal

2，OpenCASCAD 网站：www.opencascade.org由法国MatraDatavision公司开发的CAD/CAE/CAM软件平台，可以说是世界上最重要的几何造型基础软件平台之一。Op

[email protected]++letsusredefinethemeaningoftheoperatorswhenappliedtoobjects.Italsoletsusdefineconversionoperationsforclasstypes.Class-typeconversionsareusedlike

MeshAlgorithminOpenCascadeeryar@163.comAbstract.Renderingagenericsurfaceisatwostepsprocess:first,computingthepointsthatwillformthemeshofthesurfaceandthen,sendthismeshto3DAPI.UsetheTriangletotriangulat

OpenCascadeMeshVSUsageeryar@163.comAbstract.MeshVSmeansMeshVisualizationService.Itcanbeusedtorepresentationmeshindifferentstyle,suchascoloredstresspatternsmesh,meshwithtextandmeshlikevector(witharrow)