工业自动化系统和集成 产品数据表示和交换 第508部分： 应用解释构造：非多种用途表面

[中文适用范围]： ISO 10303的这一部分规定了对集成资源的解释，以满足通过非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。 — 基本曲线类型直线、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； ——基本表面类型平面、圆柱、圆锥、环面和球体； ——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； ——非流形。 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。 [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 non-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 curve types line, circle, ellipse, parabola, and hyperbola; — intersection curves; — polylines that consist of at least three points; — the elementary surface types 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; — non-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.