IFC 4.3.0.1 (IFC4X3) development

8.7.3.8 IfcConnectionPointGeometry

8.7.3.8.1 Semantic definition

IfcConnectionPointGeometry is used to describe the geometric constraints that facilitate the physical connection of two objects at a point (here IfcCartesianPoint) or at an vertex with point coordinates associated. It is envisioned as a control that applies to the element connection relationships.

The IfcPoint (or the IfcVertexPoint with an associated IfcPoint) at the PointOnRelatingElement attribute defines the point where the basic geometry items of the connected elements connect. The point coordinates are provided within the local coordinate system of the RelatingElement, as specified at the IfcRelConnectsSubtype that utilizes the IfcConnectionPointGeometry. Optionally, the same point coordinates can also be provided within the local coordinate system of the RelatedElement by using the PointOnRelatedElement attribute. If both point coordinates are not identical within a common parent coordinate system (ultimately within the world coordinate system), the subtype IfcConnectionPointEccentricity shall be used.

8.7.3.8.2 Entity inheritance

8.7.3.8.3 Attributes

# Attribute Type Description
IfcConnectionPointGeometry (2)
1 PointOnRelatingElement IfcPointOrVertexPoint

Point at which the connected object is aligned at the relating element, given in the LCS of the relating element.

2 PointOnRelatedElement OPTIONAL IfcPointOrVertexPoint

Point at which connected objects are aligned at the related element, given in the LCS of the related element. If the information is omitted, then the origin of the related element is used.

Table 8.7.3.8.A

8.7.3.8.4 Formal representation

ENTITY IfcConnectionPointGeometry
 SUPERTYPE OF (ONEOF
	(IfcConnectionPointEccentricity))
 SUBTYPE OF (IfcConnectionGeometry);
	PointOnRelatingElement : IfcPointOrVertexPoint;
	PointOnRelatedElement : OPTIONAL IfcPointOrVertexPoint;
END_ENTITY;

8.7.3.8.5 References

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