Defined in File Ifc2x3.h
IfcSurfaceOfRevolution: public Ifc2x3::IfcSweptSurface¶
Definition from ISO/CD 10303-42:1992: A surface of revolution (IfcSurfaceOfRevolution) is the surface obtained by rotating a curve one complete revolution about an axis. The data shall be interpreted as below.
The parameterization is as follows where the curve has a parameterization l(u):
C = AxisPosition.LocationV = AxisPosition.Z
In order to produce a single-value surface the a complete revolution, the curve shall be such that when expressed in a cylindrical coordinate system the curve shall be such that when expressed in a cylindrical coordinate system (r,φ ,z) centred at C with an axis V no two distinct parametric points on the curve shall have the same values for (r, z).
For a surface of revolution the parametric range is 0 < u < 360 degree. The parameterization range for v is defined by referenced curve.
NOTE: Corresponding ISO 10303 entity: surface_of_revolution. Please refer to ISO/IS 10303-42:1994, p.76 for the final definition of the formal standard.
HISTORY: New entity in IFC2x.
The surface shall not self-intersect The swept curve shall not be coincident with the axis line for any finite part of its legth.
A point on the axis of revolution and the direction of the axis of revolution.
- ::Ifc2x3::IfcAxis1Placement *