Defined in File Ifc4x3_rc1.h
IfcConic: public Ifc4x3_rc1::IfcCurve¶
Definition from ISO/CD 10303-42:1992: A conic (IfcConic) is a planar curve which could be produced by intersecting a plane with a cone. A conic is defined in terms of its intrinsic geometric properties rather than being described in terms of other geometry. A conic class always has a placement coordinate system defined by a two or three dimensional placement. The parametric representation is defined in terms of this placement coordinate system.
NOTE Corresponding ISO 10303 entity: conic, only the following subtypes have been incorporated into IFC 1.0, 1.5 & 2.0: circle as IfcCircle, ellipse as IfcEllipse. The derived attribute Dim has been added at this level and was therefore demoted from the geometric_representation_item. Please refer to ISO/IS 10303-42:1994, p. 38 for the final definition of the formal standard.
HISTORY New class in IFC Release 1.0
The location and orientation of the conic. Further details of the interpretation of this attribute are given for the individual subtypes.”.
- ::Ifc4x3_rc1::IfcAxis2Placement *