IfcAdvancedFace

标签：used shall geometry face 曲面 IfcAdvancedFace

IfcAdvancedFace

实体定义

高级面是面曲面的专业化，必须满足使用特定拓扑和几何表示项定义面、边和顶点的要求。

 

IfcAdvancedFace仅限于：

 

具有IfcElementarySurface、IfcWeptSurface或IfcBSplineSurface类型的面曲面几何体，

具有一个IfcFaceOuterBound作为面的边界，闭合曲面除外，

使所有面都由IfcEdgeLoop或IfcVertexLoop绑定

，

使所有边都具有边曲线几何图形

将边曲线几何图形限制为IfcLine、Ifconic、IfcPolyline或IfcBSplineCurve

注：实体适用于ISO 10303-511中定义的advanced_face。

IFC4中的新实体

 

Formal Propositions

Rule	Description
ApplicableSurface	The geometry used in the definition of the face shall be restricted. The face geometry shall be an IfcElementarySurface, IfcSweptSurface, or IfcBSplineSurface.
RequiresEdgeCurve	The geometry of all bounding edges of the face shall be fully defined as IfcEdgeCurve's.
ApplicableEdgeCurves	The types of curve used to define the geometry of edges shall be restricted to IfcLine, IfcConic, IfcPolyline, or IfcBSplineCurve.

 

 

 

 

 

 

 

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标签：used,shall,geometry,face,曲面,IfcAdvancedFace
From： https://www.cnblogs.com/herd/p/17578478.html