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, Iterate Fi 阅读全文
摘要：
Abstract. Qt’s Undo Framework is an implementation of the Command Pattern, for implementing undo/redo functionality in applications. The Command pattern is based on the idea that all editing in an application is done by creating instances of command objects. Command objects apply changes to the document and are stored on a command stack. Furthermore, each command knows how to undo its changes to bring the document back to its previous state. As long as the application only uses command objects t 阅读全文
摘要：
Abstract. To provide the precision required in industrial design, drawings need to offer the possibility of removing lines, which are hidden in a given projection. OpenCASCADE provides two algorithms for this Hidden Line Removal component. The paper mainly translate the document of OpenCASCADE Modeling Algorithms, and give some applications in the plant design CAD software.
Key Words. OpenCASCADE, HLR, Hidden Line Removal 阅读全文
摘要：
Abstract. OpenCASCADE have provided the Qt samples in the samples directory, but they are a little complicated. So I decide write a simple OpenCASCADE Qt demo for the OpenCASCADE beginners.
Key Words. OpenCASCADE6.8.0, Qt5.4 阅读全文
摘要：
Abstract. Siemens’ JT data format accepted as the world’s first ISO international standard for viewing and sharing lightweight 3D product information. OpenCASCADE JT Assistant is a viewer for files in JT format.
Key Words. Simens JT, JtOpen, OpenCASCADE, Jt Assistant 阅读全文
摘要：
Abstract. When you finish modeling objects in the scene, you must want to use some operations to view the scene objects, such as Pan, Zoom and Rotate the scene. Pan and Zoom is easy to understand, rotate the 3D scene according to 2D point in the viewport is a little complicated. There are many methods to rotate the 3D scene, but the Arcball Controller is intuitive for the user and any viewport can be described. You can rotate your model at will just by using the mouse.
Key Words. OpenCASCADE 阅读全文
摘要：
OpenCASCADE使用Doxygen及一些第三方程序来自动生成文档，简化程序开发过程中的文档工作。尤其是Tcl/Tk脚本的使用，让重复机械的劳动由电脑来自动完成，提高工作效率及编程的乐趣。
如果想使用搜索功能，可以自己运行gendoc.bat并指定搜索模式为local即可解决问题。 阅读全文
摘要：
Abstract. The purpose of the OpenGL graphics processing pipeline is to convert 3D descriptions of objects into a 2D image that can be displayed. In many ways, this process is similar to using a camera to convert a real-world scene into a 2D print. To accomplish the transformation from 3D to 2D, OpenGL defines several coordinate spaces and transformations between those spaces. Each coordinate space has some properties that make it useful for some part of the rendering process. The transformations 阅读全文