IfcVertex

注:定义根据ISO/CD 10303-42:1992

顶点是与点相对应的拓扑结构。它具有维数0和范围0。顶点的域,如果存在的话,就是m维实空间RM中的一个点;这由顶点点子类型表示。

注:实体改编自ISO 10303-42中定义的顶点。

IFC2.0中增加的新实体

 

非正式提议:

①顶点的维数为0。这是顶点的一个基本属性。

②顶点的范围被定义为零。

 

IfcVertex

 

 

# Attribute Type Cardinality Description C
IfcRepresentationItem
  LayerAssignment IfcPresentationLayerAssignment
@AssignedItems
S[0:1] Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items. X
  StyledByItem IfcStyledItem
@Item
S[0:1] Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. X
IfcTopologicalRepresentationItem
IfcVertex
EXPRESS Specification
ENTITY IfcVertex
 SUPERTYPE OF(IfcVertexPoint)
 SUBTYPE OF (IfcTopologicalRepresentationItem);
END_ENTITY;

 

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