工业自动化系统和集成 产品数据表示和交换 第509部分： 应用解释构造：多种用途表面

[中文适用范围]： ISO 10303 的这一部分规定了对集成资源的解释，以满足通过流形表面模型描述几何形状的要求。 以下内容属于 ISO 10303 本部分的范围： ——3D 点； ——曲线或曲面参数空间中定义的点； ——3D 曲线； ——曲面参数空间中定义的曲线；注意 - 此类曲线也称为 pcurves 或 cons，它们是参数化曲线和曲面上曲线的缩写。 ——基本曲线直线、圆、椭圆、抛物线和双曲线； ——相交曲线； ——至少由三个点组成的折线； ——基本表面平面、圆柱、圆锥、圆环和球； ——通过旋转或线性挤压曲线创建的扫掠曲面； ——雕刻的曲线和曲面； ——使用拓扑实体修剪曲线和曲面； ——使用拓扑实体组成曲线和曲面； ——曲线、曲面和曲面模型的复制； ——曲线和曲面的 3D 偏移； ——2 个歧管。 以下内容超出了 ISO 10303 本部分的范围： ——无界几何； ——自相交几何； ——二维笛卡尔坐标空间中的几何； ——点的复制； ——没有与相应几何域关联的拓扑； ——非流形。 [外文原描述]： This part of ISO 10303 specifies the interpretation of the integrated resources to satisfy requirements for the description of geometric shapes by means of manifold surface models. The following are within the scope of this part of ISO 10303: — 3D points; — points defined in the parameter space of curves or surfaces; — 3D curves; — curves defined in the parameter space of surfaces; NOTE - Such curves are also known as pcurves or cons, which are acronyms for parametrised curve and curve on surface. — the elementary curves line, circle, ellipse, parabola, and hyperbola; — intersection curves; — polylines that consist of at least three points; — the elementary surfaces plane, cylinder, cone, torus, and sphere; — swept surfaces created by rotation or linear extrusion of a curve; — sculptured curves and surfaces; — trimming of curves and surfaces using topological entities; — composition of curves and surfaces using topological entities; — replication of curves, surfaces, and surface models; — 3D offsets of curves and surfaces; — 2-manifolds. The following are outside the scope of this part of ISO 10303: — unbounded geometry; — self-intersecting geometry; — geometry in a 2D cartesian coordinate space; — replication of points; — topology without an association to a corresponding geometric domain; — non-manifolds.