IfcSubedge

IfcSubedge

实体定义

注：根据ISO/IEC 10303-42:1992的定义

子边是其域是现有边的域的连接部分的边。子边上的拓扑约束与边上的相同。

注：根据ISO 10303-42中定义的子边改编的实体。

IFC2x2中的新实体。

非正式提议：

1、子边的域被正式定义为父边的域，由子边起始顶点和子边结束顶点修剪。

2、起始顶点和结束顶点应位于父边顶点域和父边域的并集内。

 

 

 

Attribute inheritance

#	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
IfcEdge
1	EdgeStart	IfcVertex	[1:1]	Start point (vertex) of the edge.	X
2	EdgeEnd	IfcVertex	[1:1]	End point (vertex) of the edge. The same vertex can be used for both EdgeStart and EdgeEnd.	X
IfcSubedge
3	ParentEdge	IfcEdge	[1:1]	The Edge, or Subedge, which contains the Subedge.	X

 

EXPRESS Specification

ENTITY IfcSubedge
 SUBTYPE OF (IfcEdge);
  ParentEdge : IfcEdge;
END_ENTITY;

 

 

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