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OpenCASCADE Chamfer 3D Basics-卡核

OpenCASCADE Chamfer 3D Basics

OpenCASCADE Chamfer 3D Basics eryar@163.com 倒角Chamfer造型功能是几何内核一般都具有的功能,OpenCASCADE中也提供倒角Chamfer造型功能。如下图所示:   在Draw Test Harness中的源文件...
OpenCASCADE Rolling Ball-卡核

OpenCASCADE Rolling Ball

OpenCASCADE Rolling Ball eryar@163.com   在《The NURBS Book》书中引入了三边球面片(Three-sided Spherical Surface)的概念: 当三个曲面两两相交时,会使三边界曲线交于一个角点(如...
解析几何之二次型-卡核

解析几何之二次型

解析几何之二次型 eryar@163.com Abstract. 通过二次多项式的形式把二次曲线和二次曲面之间的求交问题统一成对将参数方程代入隐式方程得到问题的求解。 Key Words. Quadratic Form, Conic, Anal...
OpenCASCADE 布尔运算简介-卡核

OpenCASCADE 布尔运算简介

OpenCASCADE 布尔运算简介 eryar@163.com 布尔运算(Boolean Operations)是根据两组模型的组合创建出新的模型的造型方法。两组模型Objects/Tools之间有三种布尔算子: 布尔并:FUSE,将两组模...
OpenCASCADE 曲线向曲面投影-卡核

OpenCASCADE 曲线向曲面投影

OpenCASCADE 曲线向曲面投影 eryar@163.com   Abstract: Project a curve on a surface no matter the surface is a plane or BSpline Surface. The projected result curve are all BSpli...
OpenCASCADE 曲面展开-卡核

OpenCASCADE 曲面展开

OpenCASCADE 曲面展开 eryar@163.com   Abstract: There is a common need in industries dealing with sheet material products (shipbuilding in the sphere of vessel design, construc...
OpenCASCADE PCurve终极问题-卡核

OpenCASCADE PCurve终极问题

OpenCASCADE PCurve终极问题 eryar@163.com   Abstract: Geometry Curves and Surfaces in BRep are parametric equations. So given a parametric space curve and a geometry surface ca...
Two analytical 2d line intersection in OpenCASCADE-卡核

Two analytical 2d line intersection in OpenCASCADE

Two analytical 2d line intersection in OpenCASCADE eryar@163.com Abstract. OpenCASCADE geometric tools provide algorithms to calculate the intersection of two 2d curves, surfaces, ...
OpenCASCADE 参数曲面面积-卡核

OpenCASCADE 参数曲面面积

OpenCASCADE 参数曲面面积 eryar@163.com Abstract. 本文介绍了参数曲面的第一基本公式,并应用曲面的第一基本公式,结合OpenCASCADE中计算多重积分的类,对任意参数曲面的面积进行计算。 Key W...
OpenCASCADE构造一般曲面-卡核

OpenCASCADE构造一般曲面

OpenCASCADE构造一般曲面 eryar@163.com Abstract. 本文主要介绍常见的曲面如一般柱面(拉伸曲面)、旋转面在OpenCASCADE中的构造方法,由此思考一般放样算法的实现。 Key Words. Common Surfac...
BRep Shapes Based on Tessellated Geometry-卡核

BRep Shapes Based on Tessellated Geometry

BRep Shapes Based on Tessellated Geometry eryar@163.com Key Words. BRep Shape, Tessellated Geometry, Mesh, STL 1. Introduction OCCT的TopoDS允许定义只包含显示数据的BRep体,如只...
OpenCASCADE Face Normals-卡核

OpenCASCADE Face Normals

OpenCASCADE Face Normals eryar@163.com   Abstract. 要显示一个逼真的三维模型,其顶点坐标、顶点法向、纹理坐标这三个信息必不可少。本文主要介绍如何在OpenCASCADE的Draw中显示出曲面...