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Sweep折角过渡处理
1 Introduction在《The NURBS Book》中对扫掠曲面Swept surfaces有如下定义:S(u,v)=T(v) + M(v) C(u)其中轨道曲线记为T(v),截面曲线记为C(u),M(v)是一个变换矩阵。从扫掠曲面定义中可以看出...
使用Gmail邮箱
由于国内不能直接访问google,所以其相关产品也不能直接使用。因为Gmail简洁,使用方便,国际上用的人很多。最近发现网易邮箱大师可以直接访问Gmail,所以将方法介绍给大家,如果大家只有访问Gm...
OpenCASCADE Curve Length Calculation
OpenCASCADE Curve Length Calculation eryar@163.com Abstract. The natural parametric equations of a curve are parametric equations that represent the curve in terms of a coordinate-...
OpenCASCADE Conic to BSpline Curves-Circle
OpenCASCADE Conic to BSpline Curves-Circle eryar@163.com Abstract. The conic sections and circles play a fundamental role in CAD/CAM applications. Undoubtedly one of the greatest a...
OpenCASCADE Connect Edges to Wires
OpenCASCADE Connect Edges to Wires eryar@163.com 1 Introduction 在边界表示法(BREP)中,WIRE是由首尾依次相连的EDGE组成的闭合结构,有的内核也叫做LOOP。BREP结构中,就是通过WIR...
OpenCASCADE 3 Planes Intersection
OpenCASCADE 3 Planes Intersection eryar@163.com Abstract. OpenCASCADE provides the algorithm to search the intersection point between 3 planes. If two of the planes are parallel or...
CesiumJS – 3D Tiles BIM
CesiumJS - 3D Tiles BIM eryar@163.com 1. Introduction CesiumJS is an open-source JavaScript library for world-class 3D globes and maps. 从其官网上可以看到这个库的愿景:提供世...
OpenCascade Ray Tracing Rendering
OpenCascade Ray Tracing Rendering eryar@163.com 摘要Abstract:OpenCascade6.7.0中引入了光线跟踪算法的实现。使用光线跟踪算法可实现高质量的渲染效果,且可以使用GPU提升渲染效率。 ...
OpenCASCADE DataExchange DWG
OpenCASCADE DataExchange DWG eryar@163.com Abstract. DWG is a file format created in the 70’s for the emerging CAD applications. Currently it is the native file format of AutoCAD,...
清华笔记:计算共形几何讲义 (2)代数拓扑
这次课程,我们简单介绍曲面基本群(一维同伦群)的理论梗概。主要概念有基本群的定义,表示,计算。然后我们介绍覆盖空间理论,特别是万有覆盖空间理论,曲线同伦检测算法。【1】给出了课程的...
PythonOCC基础使用:建模——倒角倒圆(二维+三维)
参考文献: https://github.com/LiHonJun/pythonocc-demos/tree/master/examples 倒角倒圆: 倒圆倒角常用在制造业中的零件,通过将物体的棱角换为多边或者圆球形状以减小应...











