工业自动化系统和集成 产品数据表示和交换 第501部分:应用解释构造:基于边的线架

[中文适用范围]： ISO 10303 的这一部分指定了集成资源的解释，以满足使用由一组连接的边缘集界定的三维线框模型表示产品形状的要求。 以下内容属于 ISO 10303 本部分的范围： ——由边和顶点图描述的线框模型的表示，其中边仅在其顶点处相交； ——用一个或多个连接的边集表示线框模型，这些边集除顶点或边外不得重叠或相交； ——三维坐标空间中定义的点； ——在三维坐标空间中定义的曲线，包括 B 样条曲线； ——单个线框模型或线框模型组合的表示。 以下内容超出了 ISO 10303 本部分的范围： ——二维坐标空间中定义的几何形状； ——表面几何形状； ——立体几何； ——壳拓扑。 [外文原描述]： This part of ISO 10303 specifies the interpretation of the integrated resources to satisfy requirements for the representation of the product shape using three-dimensional wireframe models that are bounded by a set of connected edge sets. The following are within the scope of this part of ISO 10303: — the representation of wireframe models that are described by a graph of edges and vertices where the edges intersect only at their vertices; — the representation of a wireframe model by one or more connected edge sets that shall not overlap or intersect except at their vertices or edges; — points defined in a three-dimensional coordinate space; — curves, including b-splines, defined in a three-dimensional coordinate space; — the representation of a single wireframe model or an assembly of wireframe models. The following are outside the scope of this part of ISO 10303: — geometry defined in a two-dimensional coordinate space; — surface geometry; — solid geometry; — shell topology.