IFC 4.3.2.20250327 (IFC4X3_ADD2) under development

8.20.3.8 IfcFaceBound

8.20.3.8.1 Semantic definition

8.20.3.8.2 Entity inheritance

8.20.3.8.3 Attributes

# Attribute Type Description
IfcRepresentationItem (2)
Click to show 2 hidden inherited attributes
IfcFaceBound (2)
1 Bound IfcLoop

The loop which will be used as a face boundary.

2 Orientation IfcBoolean

This indicated whether (TRUE) or not (FALSE) the loop has the same sense when used to bound the face as when first defined. If sense is FALSE the senses of all its component oriented edges are implicitly reversed when used in the face.

Table 8.20.3.8.C

8.20.3.8.4 Examples

8.20.3.8.5 Formal representation

ENTITY IfcFaceBound
SUPERTYPE OF (ONEOF
(IfcFaceOuterBound))
SUBTYPE OF (IfcTopologicalRepresentationItem);
Bound : IfcLoop;
Orientation : IfcBoolean;
END_ENTITY;

8.20.3.8.6 References

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8.20.3.8.7 Changelog

8.20.3.8.7.1 IFC4

  • attribute Orientation type, Changed from "boolean" to "IfcBoolean"