OPEN CASCADE Curve Continuity eryar@163.com Abstract. 设计一条复杂曲线时,出于设计和制造上的考虑,常常通过多段曲线组合而成,这就需要解决曲线段之间如何实现光滑连接的问题.评价曲线间连接的光滑度的度量有两种:参数连接性和几何连续性.本文对这两种连续性分别进行介绍. Key Words. Curve Continuity, Geometric Continuity, 参数连续性.几何连续性 1.Introduction 在实际应用中进行复杂零件的…

Apply Newton Method to Find Extrema in OPEN CASCADE eryar@163.com 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 implem…

OPEN CASCADE BSpline Curve Interpolation eryar@163.com Abstract. Global curve interpolation to point data is a way to construct curves. The paper focus on the interpolate algorithm in OPEN CASCADE, and give a simple example to demonstrate the usage o…

OCCT模块结构图 基础类: Foundation Classes module underlies all other OCCT classes; 模型数据: Modeling Data module supplies data structures to represent 2D and 3D geometric primitives and their compositions into CAD models; 模型算法: Modeling Algorithms module contai…

2015/6/4 Open CASCADE Technology: IGES Support http://www.opencascade.org/doc/occt­6.7.0/overview/html/user_guides__iges.html 1/35 Table of Contents Introduction Reading IGES Procedure Domain covered Translatable entities Attributes Administrative da…

Function Set in OPEN CASCADE eryar@163.com 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, algorit…

OPEN CASCADE Multiple Variable Function eryar@163.com 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…

Construction of Primitives in Open Cascade eryar@163.com 一.创建基本图元 Making Primitives 将用到如下的类创建基本图元,包括长方体(Box).楔形体(Wedge).旋转体(Revol)等.这些类提供Shell和Solid函数来返回实体(solid)和壳(shell). 使用方法都是调用这些类的构造函数,输入相应的参数,直接构造出基本图元.构造函数的参数不同,创建的基本几何实体的形状也会不同. 注:所有旋转体的角度值都是弧…

Open Cascade DataExchange IGES eryar@163.com 摘要Abstract:本文结合OpenCascade和Initial Graphics Exchange Specification来对IGES格式进行详细说明,理解IGES格式的结构,进而方便对OpenCascade中IGES格式文件读写的实现进行理解. 关键字Key Words:IGES.Open Cascade.Data Exchange 一.引言 Introduction 目前市面上的CAD系统都有…

ACCEPTED CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION 2001 Rapid Object Detection using a Boosted Cascade of Simple Features 简单特征的优化级联在快速目标检测中的应用 Paul Viola                                                            Michael Jones viola@merl.…