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2.OpenCASCADE

OpenCASCADE code study. OpenCASCADE教程 OpenCASCADE书籍 OpenCASCADE入门 OpenCASCADE培训
     摘要: SdnfViewer - 3D Viewer for SDNF File.

Use SdnfViewer to view the structure model by SDNF file. The SdnfViewer is under developing, if you have any questions, suggestions, you can send me email, my email address is: eryar@163.com.  阅读全文

posted @ 2017-04-24 20:48 eryar 阅读(114) | 评论 (0)  编辑 |

     摘要: Abstract. Starting from OCCT6.8.0 will include one more algorithm for solving global optimization problems. Its development has been triggered by insufficient performance and robustness of existing algorithm of minimization of curve-surface distance in Extrema package. The PSO, Algorithms in this family are stochastic, and this feature can be perceived as opposite to robustness. However, we found it was not only much faster than original deterministic one, but also more robust in complex real-wo  阅读全文

posted @ 2017-04-18 22:51 eryar 阅读(163) | 评论 (0)  编辑 |

     摘要: Abstract. OpenCASCADE provides the algorithm to implement of the intersection between two 2d conic curve. The conic is defined by its implicit quadaratic equation, so the intersection problem is become a polynomial roots finding problem. The paper focus on the two conic curve intersection algorithm implementation.

Key Words. 2d conic intersection, conic equation  阅读全文

posted @ 2017-03-25 22:40 eryar 阅读(586) | 评论 (0)  编辑 |

     摘要: Abstract. OpenCASCADE provides the algorithm to implementation of the analytical intersection between a 2d line and another conic curve. The conic is defined by its implicit quadaratic equation, so the intersection problem is become a polynomial roots finding problem. The paper focus on the 2d line intersection another conic algorithm implementation.

Key Words. 2d line intersection, conic  阅读全文

posted @ 2017-03-23 23:23 eryar 阅读(234) | 评论 (0)  编辑 |

     摘要: Abstract. OpenCASCADE provides the algorithm to search the intersection point between 3 planes. If two of the planes are parallel or identical, will get no result.

Key Words. Plane Intersection  阅读全文

posted @ 2017-03-19 21:52 eryar 阅读(251) | 评论 (0)  编辑 |

     摘要: Abstract. OpenCASCADE geometric tools provide algorithms to calculate the intersection of two 2d curves, surfaces, or a 3d curve and a surface. Those are the basis of the Boolean Operation, so under the implementation can help to under the BO algorithms. The paper focus on the intersection of two 2d analytical line.

Key Words. OpenCASCADE, Line Intersection  阅读全文

posted @ 2017-02-25 23:05 eryar 阅读(323) | 评论 (0)  编辑 |

     摘要: In Visual Studio you can specify changes to environment variables in the project settings. Open your project, go to Project -> Properties... Under Configuration Properties -> Debugging, edit the Environment value to set environment variables.
For example, if you want to add the directory “c:\foo\bin” to the path when debugging your application, set the Environment value to “PATH=%PATH%;c:\foo\bin”.
  阅读全文

posted @ 2017-02-21 21:39 eryar 阅读(317) | 评论 (0)  编辑 |

     摘要:
RvmTranslator6.0 Preview:
1.Introduce Qt for a good GUI;
2.Support Dassault Systemes 3DXML translation;  阅读全文

posted @ 2017-01-18 22:38 eryar 阅读(590) | 评论 (0)  编辑 |

     摘要: Abstract. EasyMesh is developed by Bojan Niceno, it is a two-dimensional quality mesh generator. EasyMesh can generate two dimensional, unstructured, Delaunay and constrained Delaunay triangulations in general domains. It can handle holes in the domain. The paper focus on the usage of EasyMesh.

Key Words. EasyMesh, Delaunay Triangualtion, Triangulation, Mesh  阅读全文

posted @ 2017-01-06 22:54 eryar 阅读(408) | 评论 (0)  编辑 |

     摘要: 上海地目信息科技有限公司招聘OpenCASCADE相关图形开发人员,有兴趣的可直接与hr联系。  阅读全文

posted @ 2016-12-09 22:06 eryar 阅读(436) | 评论 (0)  编辑 |

     摘要: Abstract. OpenCASCADE7.1.0 introduces new built-in interactive object AIS_Manipulator providing interface for moving objects within 3D viewer. The class features three kinds of transformation modes for attached objects: translation through axis, scaling within axis, rotation around axis. The object can be activated using vmanipulator command within Draw Test Harness.

Key Words. OpenCASCADE, 3D Viewer Interactive, Model Editor, Manipulator  阅读全文

posted @ 2016-12-08 23:08 eryar 阅读(429) | 评论 (0)  编辑 |

     摘要: Abstract. The paper based on OpenCASCADE algorithms to approximate the NURBS curve to arc spline. The method is most useful in numerical control to drive the cutter along straight line or circular paths. Or in the shipbuilding industry to manufacture section bar for cold frame bender.

Key Words. NURBS, Biarc approximation, arc spline,  阅读全文

posted @ 2016-11-22 23:12 eryar 阅读(467) | 评论 (0)  编辑 |

     摘要: Abstract. Qt’s ActiveX and COM support allows Qt for Windows developers to access and use ActiveX controls and COM objects provided by any ActiveX server in their Qt applications. Make their Qt application available as COM servers, with any number of Qt objects and widgets as COM objects and ActiveX controls. Make OpenSceneGraph to ActiveX controls then you can use it in other place, like IE.

Key Words. OpenSceneGraph, ActiveX, COM, ActiveQt  阅读全文

posted @ 2016-11-11 23:32 eryar 阅读(580) | 评论 (0)  编辑 |

     摘要: Abstract. The TopLoc package of OpenCASCADE gives resources to handle 3D local coordinate systems called Locations. A Location is a composition of elementary coordinate systems, each one is called a Datum. The Location keeps track of this composition. The paper will use the Draw Test Harness to illustrate the Location concept.

Key Words. Transformation, Location, Local Coordinate Systems  阅读全文

posted @ 2016-09-07 00:06 eryar 阅读(750) | 评论 (0)  编辑 |

     摘要: OpenCASCADE BRepProj_Projection   阅读全文

posted @ 2016-08-16 23:11 eryar 阅读(696) | 评论 (0)  编辑 |

     摘要: 对于几何造型内核OpenCASCADE,由于会涉及到大量的数值算法,如矩阵相关计算,微积分,Newton迭代法解方程,以及非线性优化的一些算法,如BFGS,FRPR,PSO等等用于多元函数的极值求解,所以这些数值算法的性能直接影响系统的性能。软件的性能优化是计算机软件开发过程中需要一直关注的重要因素,因此有必要学习下C++应用程序性能优化的方法。  阅读全文

posted @ 2016-07-31 13:44 eryar 阅读(3086) | 评论 (4)  编辑 |

     摘要: IsoAlgo3d is a PCF format 3d visualization tool. I publish it on github to open the source code. Its license is GPL, you can use the IsoAlgo3d freely.

https://github.com/eryar/IsoAlgo3d

You can download the source code and contribute your modification.
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posted @ 2016-06-16 23:21 eryar 阅读(620) | 评论 (0)  编辑 |

     摘要: PCurve is a powerful modeling method, to make helix shapes in occQt to help you understand pcurve better, then you can also can model some intereting shape based on pcurve.

OpenCASCADE does not provide helix curve directly, but you can build a helix curve by the pcurve of a surface(curve on surface). When you understand the pcurve of a surface, you can make a helix curve easily.
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posted @ 2016-06-05 13:44 eryar 阅读(761) | 评论 (2)  编辑 |

     摘要: Abstract. OpenCASCADE provide data structure of any expression, relation or function used in mathematics. Flex and Bison are tools for building programs that handle structured input. They were originally tools for building compilers, but they have proven to be useful in many other areas. The Expression Interpreter in OpenCASCADE is made by Flex and Bison. So let’s know something about Flex and Bison.

Key Words. OpenCASCADE, Expression Interpreter, Flex, Bison  阅读全文

posted @ 2016-05-27 23:08 eryar 阅读(661) | 评论 (0)  编辑 |

     摘要:   FreeCAD是一个参数化的三维造型软件,主要用于任意大小的实际模型的设计。参数化的建模方式可以通过修改相关参数从而方便地修改你的设计。FreeCAD是开源软件,并提供了便利地自定义方式,也提供了脚本,从而根据自己的需要去扩展功能。FreeCAD是跨平台(Windows, Mac和Linux),可以读写许多开放的模型文件,如STEP,IGES,STL,SVG,DXF,OBJ,IFC,DAE等。
  如果说学习OpenCASCADE可以了解一些几何内核底层的算法,那么学习FreeCAD则可以用来实现一些具体的功能,从而将三维的技术应用到实际的生活中去,创造出有意义的功能。
本文详细说明如何在Windows平台上编译FreeCAD源码。如果你已经可以正常编译OpenCASCADE这种开源库的源码,那么编译FreeCAD还是很简单的。  阅读全文

posted @ 2016-05-08 11:07 eryar 阅读(2049) | 评论 (0)  编辑 |

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