ISO 10303-521:2003 工业自动化系统和综合-产品数据表示和交换-第521部分：应用说明：多种形式地表下部分

标准编号：ISO 10303-521:2003

中文名称：工业自动化系统和综合-产品数据表示和交换-第521部分：应用说明：多种形式地表下部分

英文名称：Industrial automation systems and integration — Product data representation and exchange — Part 521: Application interpreted construct: Manifold subsurface

发布日期：2003-03

标准范围

ISO 10303-521:2003规定了集成资源的解释，以满足对包含定义为连接面子集的开放壳的形状表示的定义的要求。每个连接面子集的域是另一个开放或封闭壳的域的一部分。在连接的面子集中，各个面或边可以被识别为子面或子边。以下内容属于ISO 10303-521:2003的范围:3D几何；高级面孔；连通面子集；映射和几何变换；打开外壳；拓扑对象的域之间的关系；子边缘；子面；具有相关拓扑边界的无界几何；使用拓扑来绑定几何实体。以下内容超出了ISO 10303-521的范围:2003:除了用于在曲面的参数空间中定义pcurve之外的2D几何图形；边界表示实体模型；折线和B样条曲线以外的有界曲线；B样条曲面以外的有界曲面；非流形几何；偏移曲线和曲面；没有拓扑边界的无界几何。

ISO 10303-521:2003 specifies the interpretation of the integrated resources to satisfy the requirement for the definition of a shape representation containing open shells defined as connected face sub sets. The domain of each connected face sub set is part of the domain of another open, or closed shell. Within the connected face sub set individual faces or edges may be identified as being subfaces, or subedges.The following are within the scope of ISO 10303-521:2003:

• 3D geometry;
• advanced faces;
• connected face sub sets;
• mappings and geometric transformations;
• open shells;
• relationships between domains of topological objects;
• subedges;
• subfaces;
• unbounded geometry with associated topological boundaries;
• use of topology to bound geometric entities.

• 2D geometry other than for the definition of a pcurve in the parameter space of a surface;
• boundary representation solid models;
• bounded curves other than polylines and B-spline curves;
• bounded surfaces other than B-spline surfaces;
• non-manifold geometry;
• offset curves and surfaces;
• unbounded geometry without topological boundaries.

标准预览图