8.20.3.19 IfcVertexLoop

8.20.3.19.1 Semantic definition

Informal Propositions

1. A vertex loop has zero extent and dimensionality.
2. The vertex loop has genus 0.

8.20.3.19.2 Entity inheritance

1. • IfcRepresentationItem
2. • IfcTopologicalRepresentationItem
   • IfcGeometricRepresentationItem
   • IfcMappedItem
   • IfcStyledItem
3. • IfcLoop
   • IfcConnectedFaceSet
   • IfcEdge
   • IfcFace
   • IfcFaceBound
   • IfcPath
   • IfcVertex
4. • IfcVertexLoop
   • IfcEdgeLoop
   • IfcPolyLoop

8.20.3.19.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	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.
	StyledByItem	SET [0:1] OF IfcStyledItem FOR Item	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
IfcVertexLoop (1)
1	LoopVertex	IfcVertex	The vertex which defines the entire loop.

8.20.3.19.4 Formal representation

ENTITY IfcVertexLoop
 SUBTYPE OF (IfcLoop);
	LoopVertex : IfcVertex;
END_ENTITY;

8.20.3.19.5 References

• IfcLoop