IFC 4.3.0.1 (IFC4X3) development

8.9.3.51 IfcPointOnSurface

8.9.3.51.1 Semantic definition

The IfcPointOnSurface is a point defined by two parameter value of its defining surface.

Informal Propositions:

  1. The parametric values specified for u and v shall not be outside the parametric range of the basis surface.

8.9.3.51.2 Entity inheritance

8.9.3.51.3 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
IfcPointOnSurface (4)
1 BasisSurface IfcSurface

The surface to which the parameter values relate.

2 PointParameterU IfcParameterValue

The first parameter value of the point location.

3 PointParameterV IfcParameterValue

The second parameter value of the point location.

* Dim IfcDimensionCount

This attribute is formally derived.

BasisSurface.Dim

The space dimensionality of this class, determined by the space dimensionality of the basis surface.

Table 8.9.3.51.A

8.9.3.51.4 Formal representation

ENTITY IfcPointOnSurface
 SUBTYPE OF (IfcPoint);
	BasisSurface : IfcSurface;
	PointParameterU : IfcParameterValue;
	PointParameterV : IfcParameterValue;
 DERIVE
	 Dim : IfcDimensionCount := BasisSurface.Dim;
END_ENTITY;

8.9.3.51.5 References

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