OpenCASCADE

摘要： Abstract. Today most 3D engineering model data are save to 3D PDF files. Universal 3D(U3D) along side Product Representation Compact(PRC), U3D is the historical foundation used to embed 3D interactive data and models into a PDF file. But PRC is now the preferred and most feature-rich method to embed 3D data into a PDF file. So the paper is focus on to translate OpenCASCADE geometry data to 3D PDF by embedding PRC file. Key Words. PDF 3D, OpenCASCADE, U3D, PRC, libharu 阅读全文

摘要： Abstract. In modeling, it is often required to approximate or interpolate points to curves and surfaces. In interpolation, the process is complete when the curve or surface passes through all the points; in approximation, when it is as close to these points as possible. The paper is the translation of the OpenCASCADE Modeling Data user guide. Key Words. Interpolation, Approximation, Fitting 阅读全文

摘要： Tcl内置变量备忘录。 阅读全文

摘要： Abstract. The general method to directly create an edge is to give a 3D curve as the support(geometric domain) of the edge. The curve maybe defined as a 2D curve in the parametric space of a surface: PCurve. When you understand the pcurve, you can modeling some interesting shapes, such as bottle neck thread, helix spring, ring type spring. Etc. The paper is focus on the Ring Type Spring Modeling in OpenCASCADE Draw Test Harness by Tcl script. Key Words. Spring, Helix, Tcl/Tk, 环形弹簧 阅读全文

摘要： 鞋博士经过8年沉淀，在鞋类工业4.0全流程平台上积累了相当的技术实力，获投资商亲睐。 新的一年，在投资商协助下，将踏上新的征途，因此诚邀您加盟顶层技术合伙人。 如果您具备以下实力，我们期待您的加盟： 1、熟悉C++ 2、熟悉图形学 3、学过矩阵，优化理论者优先 4、能阅读英文技术文档 5、人品好，踏 阅读全文

摘要： 为了帮助OPEN CASCADE新手顺利编译OPEN CASCADE源码，特录制了一个视频， 有了这个视频，OPEN CASCADE的编译再也不麻烦啦！ 阅读全文

摘要： Abstract. The common math algorithms library provides a C++ implementation of the most frequently used mathematical algorithms. These include: algorithms to solve a set of linear algebraic equations, algorithms to find the minimum of a function of one or more independent variables, algorithms to find roots of one, or of a set of non-linear equations, algorithm to find the eigenvalues and eigenvectors of a square matrix. The solver for function set is used widely in extrema value evaluation, poin 阅读全文

摘要： Happy New Year! 阅读全文

摘要： Abstract. In calculus, Newton’s method is used for finding the roots of a function. In optimization, Newton’s method is applied to find the roots of the derivative. OPEN CASCADE implement Newton method to find the extrema for a multiple variables function, such as find the extrema point for a curve and a surface. Key Words. Nonlinear Programming, Newton Method, Extrema, OPEN CASCADE 阅读全文

摘要： Abstract. Multiple variable function with gradient and Hessian matrix is very very import in OPEN CASCADE optimization algorithms. In order to understand these optimization algorithm better, let’s study some basic knowledge about Gradient, Hessian Matrix. Key Words. Multiple Variable Function, Gradient, Hessian Matrix, 最优化算法, 阅读全文