三维BREP拓扑概念
CadQuery基于OpenCascade内核,它对对象使用边界表示(BREP)。这只是意味着对象是由它们的封闭表面定义的。
1.vertex : a single point in space
顶点:几何中的某个点
2.edge : a connection between two or more vertices along a particular path (called a curve)
线:由两个或者更多个顶点组成的线
3.wire : a collection of edges that are connected together.
线框:edge的集合,由线组成
4.face : a set of edges or wires that enclose a surface
面:由线或者线框组成,并且是个封闭的几何
5.shell : a collection of faces that are connected together along some of their edges
壳:由面组成的空壳,面之间相互连接
6.solid : a shell that has a closed interior
实体:由壳组成的一个实心几何,壳可以理解为实体的表皮,实体简称为体
7.compound : a collection of solids
多体:由多个实体组成,与装配体的观念类似
参考occ官方文档中的图片:https://dev.opencascade.org/doc/overview/html/occt_user_guides__modeling_data.html