OpenCASCADE

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

摘要： Abstract. OpenCASCADE introduce a new class Graphic3d_Camera for the Visualization module. The camera class provides object-oriented approach to setting up projection and orientation properties of 3D view. The paper use GLUT to test the function of the new Camera class. Key Words. OpenCASCADE, Camera, OpenGL, GLUT, Transformations 阅读全文

摘要： Abstract. The quaternions are members of a noncommutative division algebra first invented by William Rowan Hamilton. The idea for quaternions occurred to him while he was walking along the Royal Cannal on his way to a meeting of the Irish Academy, and Hamilton was so pleased with his discovery that he scratched the fundamental formula of quaternion algebra. There are several different ways we can express orientation and angular displacement in 3D. Here we discuss the three most important methods 阅读全文

摘要： Abstract. OpenCASCADE linear extrusion surface is a generalized cylinder. Such a surface is obtained by sweeping a curve (called the “extruded curve” or “basis”) in a given direction (referred to as the direction of extrusion and defined by a unit vector). The u parameter is along the extruded curve. The v parameter is along the direction of extrusion. The form of a surface of linear extrusion is generally a ruled surface. It can be a cylindrical surface, or a planar surface. Key Words. OpenC 阅读全文

摘要： Abstract. The sphere is the simplest topology shape of the BRep structure. But there are several import concept of the sphere edges, such as degenerated edge and seam edge. So construct a sphere by code, you will learn these. Key Words. OpenCASCADE, Sphere, BRep 阅读全文