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     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(585) | 评论 (0)编辑 收藏

     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(619) | 评论 (0)编辑 收藏

     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(728) | 评论 (0)编辑 收藏

     摘要: RvmTranslator5.1 is released! This is a 3ds max plugin developed by 3ds max sdk.  阅读全文

posted @ 2016-10-03 12:14 eryar 阅读(793) | 评论 (0)编辑 收藏

     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(903) | 评论 (0)编辑 收藏

     摘要: RvmTranslator5.0 is released!

This version support to translate RVM to AutoCAD DXF file.  阅读全文

posted @ 2016-08-22 23:26 eryar 阅读(697) | 评论 (0)编辑 收藏

     摘要: OpenCASCADE BRepProj_Projection   阅读全文

posted @ 2016-08-16 23:11 eryar 阅读(812) | 评论 (0)编辑 收藏

     摘要: RvmTranslator4.3 ChangeLog

1. Reduce the STEP file size to improve the performance for STEP translation;
2.Fix the dish lose in STEP file;  阅读全文

posted @ 2016-08-13 09:58 eryar 阅读(543) | 评论 (0)编辑 收藏

     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(3257) | 评论 (4)编辑 收藏

     摘要: In order to export PDMS model to other system more convenient, I wrapped the RvmTranslator in PDMS by PML. Then you can export PDMS model to STEP, IGES, STL, 3D PDF. Etc. Directly.   阅读全文

posted @ 2016-06-26 00:39 eryar 阅读(961) | 评论 (9)编辑 收藏

     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.
  阅读全文

posted @ 2016-06-16 23:21 eryar 阅读(746) | 评论 (0)编辑 收藏

     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.
  阅读全文

posted @ 2016-06-05 13:44 eryar 阅读(873) | 评论 (2)编辑 收藏

     摘要: Abstract. AVEVA PDMS Pipe Router is a rule-based tool which enables you to route pipe network automatically and to position piping components. Pipe Router can create clash-free orthogonal routes which use the minimum length of pipe and as few elbows and bends as possible.

Key Words. Automatic Pipe Routing, 自动布管  阅读全文

posted @ 2016-05-31 22:59 eryar 阅读(1129) | 评论 (0)编辑 收藏

     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(750) | 评论 (0)编辑 收藏

     摘要:   本文主要描述如何修改FreeCAD的Branding,从而使自己能基于FreeCAD灵活的架构快速开发出自己的应用程序。通过修改FreeCAD的Branding甚至启动画面,从而使程序看上去更像是自己开发的。  阅读全文

posted @ 2016-05-09 22:18 eryar 阅读(838) | 评论 (2)编辑 收藏

     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(2480) | 评论 (0)编辑 收藏

     摘要:   CPU要读写一个内存单元时,必须先要给出这个内存单元的地址,在8086PC中内存地址由段地址和偏移地址组成。8086CPU中有一个DS(Data Segment)寄存器,通常用来存放要访问数据的段地址。
  8086CPU也提供相关的指令以栈的方式LIFO(Last In First Out后进先出)来访问内存空间。这意味着在基于8086CPU编程的时候,可以将一段内存当作栈来使用。8086CPU提供入栈和出栈的指令:push和pop。比如push ax表示将寄存器AX中的数据入栈;pop AX表示从栈顶取出数据送入AX。  阅读全文

posted @ 2016-05-02 23:14 eryar 阅读(761) | 评论 (0)编辑 收藏

     摘要: Assembly Loop.  阅读全文

posted @ 2016-04-27 22:01 eryar 阅读(801) | 评论 (0)编辑 收藏

     摘要: The IsoAlgo means the Piping Isometric Drawing Algorithm which can be used to generate the isometrics for pipeline. It reads Piping Component File(PCF) and generates the piping isometric drawing in DXF format.   阅读全文

posted @ 2016-04-25 22:28 eryar 阅读(481) | 评论 (0)编辑 收藏

     摘要: 汇编程序输出字符到窗口。  阅读全文

posted @ 2016-04-16 18:59 eryar 阅读(993) | 评论 (0)编辑 收藏

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