8.9.3.50 IfcPointOnSurface

8.9.3.50.1 Semantic definition

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

Informal Propositions

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

8.9.3.50.2 Entity inheritance

8.9.3.50.3 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. 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
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 8.9.3.50.A

8.9.3.50.4 Formal representation

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

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

8.9.3.50 IfcPointOnSurface

8.9.3.50.1 Semantic definition

8.9.3.50.2 Entity inheritance

8.9.3.50.3 Attributes

8.9.3.50.4 Formal representation

8.9.3.50.5 References