IFC (IFC4X3) development IfcPointOnSurface 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. Entity inheritance 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.


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

Table Formal representation

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

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