8.9.3.40 IfcOffsetCurve

ABSTRACT This definition may not be instantiated

8.9.3.40.1 Semantic definition

An IfcOffsetCurve is an abstract entity describing a curve that is defined relative to another curve according to an offset that may be constant or variable along the referenced curve.

8.9.3.40.2 Entity inheritance

8.9.3.40.3 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. IFC2x3-CHANGE The inverse attribute LayerAssignments has been added. IFC4-CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
	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. IFC2x3-CHANGE The inverse attribute StyledByItem has been added.
IfcCurve (1)
*	Dim	IfcDimensionCount	This attribute is formally derived. `IfcCurveDim(SELF)` The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve.
Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes
IfcOffsetCurve (1)
1	BasisCurve	IfcCurve	The curve that is being offset.

Table 8.9.3.40.A

8.9.3.40.4 Formal representation

ENTITY IfcOffsetCurve
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcOffsetCurve2D
	,IfcOffsetCurve3D
	,IfcOffsetCurveByDistances))
 SUBTYPE OF (IfcCurve);
	BasisCurve : IfcCurve;
END_ENTITY;