8.9.3.49 IfcPointOnCurve

8.9.3.49.1 Semantic definition

The IfcPointOnCurve is a point defined by a parameter value of its defining curve.

{ .extDef}

Informal Propositions

The value of the point parameter shall not be outside the parametric range of the curve.

#	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.
IfcPoint (1)
*	Dim	IfcDimensionCount	This attribute is formally derived. `IfcPointDim(SELF)` The space dimensionality of this abstract class, handled by a function specific for concrete subtypes. Determined by the number of coordinate components in case of IfcCartesianPoint or by the dimensionality of the basis curve or surface in other cases.
Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes
IfcPointOnCurve (2)
1	BasisCurve	IfcCurve	The curve to which point parameter relates.
2	PointParameter	IfcParameterValue	The parameter value of the point location.

Table A

ENTITY IfcPointOnCurve
SUBTYPE OF (IfcPoint);
BasisCurve : IfcCurve;
PointParameter : IfcParameterValue;
END_ENTITY;