IFC 4.3.0.1 (IFC4X3) development

8.9.3.45 IfcPcurve

8.9.3.45.1 Semantic definition

The IfcPcurve is a curve defined within the parameter space of its reference surface.

8.9.3.45.2 Entity inheritance

8.9.3.45.3 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.

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
IfcPcurve (2)
1 BasisSurface IfcSurface

No description available.

2 ReferenceCurve IfcCurve

No description available.

Table 8.9.3.45.A

8.9.3.45.4 Formal propositions

Name Description
DimIs2D

The dimensionality of the parameter space curve shall be 2.

ReferenceCurve.Dim = 2
Table 8.9.3.45.B

8.9.3.45.5 Formal representation

ENTITY IfcPcurve
 SUBTYPE OF (IfcCurve);
	BasisSurface : IfcSurface;
	ReferenceCurve : IfcCurve;
 WHERE
	DimIs2D : ReferenceCurve.Dim = 2;
END_ENTITY;

8.9.3.45.6 References

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8.9.3.45.7 Changelog

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