8.9.3.42 IfcOffsetCurve3D

8.9.3.42.1 Semantic definition

An IfcOffsetCurve3D is a curve defined by an offset in 3D space from its BasisCurve.

Informal Propositions:

1. At no point on the curve shall ref direction be parallel, or opposite to, the direction of the tangent vector.

8.9.3.42.5 Formal representation

ENTITY IfcOffsetCurve3D
SUBTYPE OF (IfcOffsetCurve);
Distance : IfcLengthMeasure;
SelfIntersect : IfcLogical;
RefDirection : IfcDirection;
WHERE
DimIs2D : BasisCurve.Dim = 3;
END_ENTITY;