几何造型器

几何造型系统是指能够定义、描述、生成几何模型,并能够进行交互编辑处理的系统称为几何造型系统。采用几何造型技术,可以将物体的形状及其各种属性存储在计算机内,形成该物体的几何模型。这样的几何模型是对原物体确切的数学表达,或对其某种状态的真实模拟。
Plant Design Review Based on AnyCAD-卡核

Plant Design Review Based on AnyCAD

Plant Design Review Based on AnyCAD eryar@163.com Abstract. AVEVA Review is used to 3D model visualization for plant or ship design, construction and operation. Taking data from a ...
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 Primitives BRep - Sphere-卡核

OpenCascade Primitives BRep – Sphere

OpenCascade Primitives BRep - Sphere eryar@163.com Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associa...
Polynomial Library in OpenCascade-卡核

Polynomial Library in OpenCascade

Polynomial Library in OpenCascade eryar@163.com 摘要Abstract:分析幂基曲线即多项式曲线在OpenCascade中的计算方法,以及利用OpenSceneGraph来显示OpenCascade的计算结果,加深对多项式曲线...
Plant Design Review Based on AnyCAD-卡核

Plant Design Review Based on AnyCAD

Plant Design Review Based on AnyCAD eryar@163.com Abstract. AVEVA Review is used to 3D model visualization for plant or ship design, construction and operation. Taking data from a ...
Conversion Operators in OpenCascade-卡核

Conversion Operators in OpenCascade

Conversion Operators in OpenCascade eryar@163.com Abstract. C++ lets us redefine the meaning of the operators when applied to objects. It also lets us define conversion operations ...
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...
GLUT Trackball Demo-卡核

GLUT Trackball Demo

GLUT Trackball Demo eryar@163.com 1.Introduction 在三维场景中建立模型后,为了方便用户从各个角度观察模型,从而需要对三维视图进行控制。常见的视图交互控制方式有:Trackball控制器、飞行...
清华笔记:计算共形几何讲义 (8)狭缝映射(Slit Map)的存在性-卡核

清华笔记:计算共形几何讲义 (8)狭缝映射(Slit Map)的存在性

我们用较为初等的复变函数方法证明一种共形映射的存在性:狭缝映射(slit mapping)。如图所示,给定亏过为0的多连通曲面,存在共形映射将其映射到平面区域,每个边界的联通分支都被映成一条狭...
OpenCASCADE Hidden Line Removal-卡核

OpenCASCADE Hidden Line Removal

OpenCASCADE Hidden Line Removal eryar@163.com Abstract. To provide the precision required in industrial design, drawings need to offer the possibility of removing lines, which are ...
A Simple OpenGL Shader Example-卡核

A Simple OpenGL Shader Example

A Simple OpenGL Shader Example eryar@163.com Abstract. OpenGL Shading Language, the high-level programming language defined to allow application writers to write programs that exec...
清华笔记:计算共形几何讲义 (12)极值长度-卡核

清华笔记:计算共形几何讲义 (12)极值长度

图1. 圆柱面的共形模。拓扑等价的度量曲面是否共形等价,亦即拓扑同胚的带有黎曼度量的曲面间是否存在保角双射,这是一个微妙的问题。几何上,我们需要寻找共形变换下的全系不变量,通过比较不...