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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 閱讀全文
摘要: AVEVA Isodraft, OUTCOM, attributes.
AVEVA Isodraft中有許多開關用于配置管道ISO圖的圖面內容，這些配置都可以從文檔《Isodraft Reference Manual》中找到。如有需要在管件上標出管底標高，如何在Isodraft中配置呢？ 閱讀全文
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. 閱讀全文
摘要: AVEVA的RVM文件格式包含了三維模型數據及其他信息，可用于工廠模型的瀏覽、評審等。常見的三維瀏覽及評審軟件如Autodesk的Navisworks、Intergraph的評審軟件SmartPlant Review Publisher等，都提供了對RVM格式的支持。 閱讀全文
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 閱讀全文
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 閱讀全文
摘要: 用C++來開發管道出圖程序IsoAlgo時，當PCF文件名中包含中文時，讀取文件會失敗。
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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 閱讀全文
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 閱讀全文
摘要: 在管道設計過程中，會使用到大量的標準，如ASME，DIN，GB，CB，HG，SH等等。管道設計人員在設計過程中，需要翻閱相關標準手冊，查找所需要的數據，較為繁瑣。如果能將相關管件的數據以直觀的方式展示出來，可以極大地提高管道設計人員的設計效率。
pipedata3d通過把標準數據以表格及三維模型的方式展示出來，更加形象直觀，在方便設計人員查詢數據的同時，增加了些許趣味性，提高設計效率。
pipedata3d操作簡單，且可客戶定制標準數據，擴展方便，有以下特點：
三維模型顯示部件及尺寸標注，非常直觀；
標準數據擴展方便，使用Tcl腳本實現；
標準數據將會放在網上共享； 閱讀全文
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 閱讀全文
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 閱讀全文
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 閱讀全文
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 閱讀全文
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 閱讀全文
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