IFC (IFC4X3_TC1) 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.

IfcPoint (1)
* Dim IfcDimensionCount

This attribute is formally derived.


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
IfcPointOnSurface (3)
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.

Table Formal representation

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