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摘要: Abstract. OpenGL Shading Language, the high-level programming language defined to allow application writers to write programs that execute on the programmable processors defined within OpenGL. Informally the language is sometimes referred to as GLSL. The GLSL has been made part of the OpenGL standard as of OpenGL2.0. The paper focus on a simple example of OpenGL Shader, which can be used as a guide of GLSL.
Key Words. OpenGL, OpenGL Shading Language, GLSL, Shader, Qt 阅读全文
摘要: AVEVA Isodraft, OUTCOM, attributes.
AVEVA Isodraft中有许多开关用于配置管道ISO图的图面内容，这些配置都可以从文档《Isodraft Reference Manual》中找到。如有需要在管件上标出管底标高，如何在Isodraft中配置呢？ 阅读全文
摘要: It can compile and run correctly, the compile error in occQt do not appear in the test program. you can also debug the code in Qt Creator. So use Qt Creator to program on Linux is very convenient. 阅读全文
摘要: AVEVA的RVM文件格式包含了三维模型数据及其他信息，可用于工厂模型的浏览、评审等。常见的三维浏览及评审软件如Autodesk的Navisworks、Intergraph的评审软件SmartPlant Review Publisher等，都提供了对RVM格式的支持。 阅读全文
摘要: Abstract. OpenCASCADE provides a class BRepBuilderAPI_MakeFace to build topological faces. A face maybe built from a surface, elementary surface from gp package, surface from Geom, from a wire and find the surface automatically if possible, etc. If a face is built, how to check it for visualization? What does PCurve means? The paper will answer those question.
Key Words. OpenCASCADE, Topological Face, PCurve, Holes 阅读全文
摘要: Abstract. AVEVA Review is used for 3D model visualisation for plant or ship design, construction and operation. The RVM file is main input of AVEVA Review. RvmTranslator can translate RVM file to STEP, IGES, STL, etc without Review, only rely on the RVM file.
Key Words. AVEVA Review, PDMS RVM, STEP, IGES, STL, Data Exchange 阅读全文
摘要: 用C++来开发管道出图程序IsoAlgo时，当PCF文件名中包含中文时，读取文件会失败。
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摘要: Abstract. PostgreSQL is an excellent implementation of relational database, fully featured, open source, and free to use. Nearly nontrivial computer applications manipulate large amounts of data, and a lot of applications are written primarily to deal with data rather than perform calculations. Some writers estimate that 80% of all application development in the world today is connected in some way to complex data stored in a database, so databases are very important foundation to many applicati 阅读全文
摘要: Abstract. OpenCASCADE BRepTools provides utilities for BRep data structure. OuterWire method to find the outer wire of a face. Dump method to dump a BRep object. It also can be used as the data exchange for OpenCASCADE native shapes.
Key Words. OpenCASCADE, BRepTools, BRep, Topology 阅读全文
摘要: 在管道设计过程中，会使用到大量的标准，如ASME，DIN，GB，CB，HG，SH等等。管道设计人员在设计过程中，需要翻阅相关标准手册，查找所需要的数据，较为繁琐。如果能将相关管件的数据以直观的方式展示出来，可以极大地提高管道设计人员的设计效率。
pipedata3d通过把标准数据以表格及三维模型的方式展示出来，更加形象直观，在方便设计人员查询数据的同时，增加了些许趣味性，提高设计效率。
pipedata3d操作简单，且可客户定制标准数据，扩展方便，有以下特点：
三维模型显示部件及尺寸标注，非常直观；
标准数据扩展方便，使用Tcl脚本实现；
标准数据将会放在网上共享； 阅读全文
摘要: Abstract. Pipedata3d show piping component data in tables and 3D modeling. It can help the piping designers to looking up piping information quickly and so improve the efficiency of piping design.
Key Words. Pipedata3d, ASME, GB, HG, CB, Piping Design 阅读全文
摘要: Abstract. The Visual Studio Natvis framework lets you customize the way Visual Studio displays native types in debugger variable windows such as the Watch, Locals and Data Tips windows. It supersedes the autoexp.dat file that has been used in earlier versions of Visual Studio and offers XML syntax, better diagnostics, versioning, and multiple file support. The container in OpenCASCADE is difficult for debugging, such as TColStd_Array1OfInteger in the TColStd package, .etc. Use the natvis framewo 阅读全文
摘要: Abstract. Qt contains a set of item view classes that use a model/view architecture to manage the relationship between data and the way it is presented to the user. The separation of functionality introduced by this architecture gives developers greater flexibility to customize the presentation of items, and provides a standard model interface to allow a wide range of data sources to be used with existing item views. Model 3D aided design software such as AVEVA Plant/PDMS, Marine use the archite 阅读全文
摘要: Abstract. OpenCASCADE provides a general transformation class: gp_GTrsf. It can be a transformation from gp, an affinity, or you can define your own transformation giving the matrix of transformation. The general transformation contains the vectorial part of the transformation and the translation part. A GTrsf transformation is only applicable to coordinates. Be careful if you apply such a transformation to all points of a geometric object, as this can change the nature of the object and thus re 阅读全文
摘要: Abstract. Tcl/Tk provide a programming system for developing and using graphical user interface(GUI) applications. Tcl stands for “tool command language” and is pronounced “tickle”, is a simple scripting language for controlling the extending applications. The blog use Tcl/Tk to iterate all the files for a given directory, this is useful to some automation work, such as change all the file names for a given directory; add copyright info for the source code files.
Key Words. Tcl/Tk, Iter 阅读全文
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