Mesh BRep Shapes eryar@163.com Abstract. 当对OpenCASCADE的BRep表示法的数据结构有了一定的理解后,建议可以自己实现一个显示数据生成的功能,即网格剖分功能. Key Words. BRep, Mesh, Triangulation 1. Introduction 在OpenCASCADE中网格剖分功能是很重要的一个模块,他可用于生成模型的可视化数据,还可用于HLR消隐,对于离散求交算法也是基于网格数据.OpenCASCADE开源版本中的模块TK…

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,如只包含边的显示数据:多段线:面的显示数据:网格,而不包含几何曲线和曲面.只包含显示数据的BRep体有时候很有用,如只需要显示一下而不对其做任何修改.但是OCC7.3.0版本之前是不支持这…

Topology Shapes of OpenCascade BRep eryar@163.com 摘要Abstract:通过对OpenCascade中的BRep数据的读写,理解边界表示法的概念及实现.理解了拓朴形状的数据结构,就对ModelingData模块有了清晰认识,方便OpenCascade其他模块如ModelingAlgorithms和Visiualization模块的理解. 关键字Key Words:OpenCascade, BRep, Topology, BRep Format 一…

Mesh Algorithm in OpenCascade eryar@163.com Abstract. Rendering a generic surface is a two steps process: first, computing the points that will form the mesh of the surface and then, send this mesh to 3D API. Use the Triangle to triangulate the param…

OpenCascade Primitives BRep - Box eryar@163.com Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this ca…

Representation Data in OpenCascade BRep eryar@163.com 摘要Abstract:现在的显示器大多数是光栅显示器,即可以看做一个像素的矩阵.在光栅显示器上显示的任何图形,实际上都是一些具有一种或多种颜色的集合.数学上精确表示的图形在显示器中只能用逼近的方式显示出来.本文主要对OpenCascade的BRep文件中用来显示曲线和曲面的离散数据结构进行说明. 关键字:OpenCascade, BRep, Polygon, Triangulation,…

OpenCascade BRep Format Description eryar@163.com 摘要Abstract:本文结合OpenCascade的BRep格式描述文档和源程序,对BRep格式进行分析,详细说明BRep的数据组织形式.结合源程序,可以对OpenCascade中Modeling Data模块中的模型数据结构进行理解. 关键字Key Words:OpenCascade, BRep Format, ModelingData 一.引言 Introduction OpenCascad…

转自 http://www.cppblog.com/eryar/archive/2013/08/20/202678.html Topology and Geometry in OpenCascade-Vertex eryar@163.com 摘要Abstract:本文简要介绍了几何造型中的边界表示法(BRep),并结合程序说明OpenCascade中的边界表示的具体实现,即拓朴与几何的联系.对具有几何信息的拓朴结构顶点(vertex).边(edge).面(face)进行了详细说明.本文只对顶点数…

OpenCASCADE Incremental Mesh eryar@163.com Abstract. OpenCASCADE IncrementalMesh is used to build the mesh of a shape with respect of their correctly triangulated parts. The blog focus on the deflection control of the algorithm. Key Words. Mesh, Visu…

EasyMesh - A Two-Dimensional Quality Mesh Generator eryar@163.com Abstract. EasyMesh is developed by Bojan Niceno, it is a two-dimensional quality mesh generator. EasyMesh can generate two dimensional, unstructured, Delaunay and constrained Delaunay…