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IfcConnectionCurveGeometry

Definition from IAI: The IfcConnectionCurveGeometry is used to describe the geometrical constraints that facilitate the physical connection of two objects at a curve (IfcBoundedCurve). It is envisioned as a control that applies to the element connection relationships.

The available geometry for the connection constraint may be further restricted to only allow straight segments by applying IfcPolyline only.

HISTORY New entity in IFC Release 1.5, has been renamed from IfcLineConnectionGeometry in IFC 2x.
ISSUE See issue log for changes made in IFC Release 1.5 and IFC 2x.

Geometry Use Definitions:

The bounded curve defines the line (and arc) segments, where the basic geometry items of the connected element connects.

EXPRESS specification:

ENTITY IfcConnectionCurveGeometry
SUBTYPE OF ( IfcConnectionGeometry);
CurveOnRelatingElement  :  IfcBoundedCurve;
CurveOnRelatedElement  :  OPTIONAL IfcBoundedCurve;
END_ENTITY;

Attribute definitions:

CurveOnRelatingElement  :  Line at which connected objects are aligned at the relating element, given in the LCS of the relating element.
CurveOnRelatedElement  :  Line (bounded curve) at which connected objects are aligned at the related element, given in the LCS of the related element. If the information is omitted, than the origin of the related element is used.

References (1):

Name Type Referred through Express-G
IfcConnectionGeometry Entity
Subtype
Diagram 2

Inheritance graph

ENTITY IfcConnectionCurveGeometry;
ENTITY IfcConnectionCurveGeometry;
CurveOnRelatingElement  :  IfcBoundedCurve;
CurveOnRelatedElement  :  OPTIONAL IfcBoundedCurve;
END_ENTITY;