Defined in File Ifc4x3_rc1.h
IfcPcurve: public Ifc4x3_rc1::IfcCurve¶
Definition from ISO/CD 10303-42:1992: A pcurve is a curve which lies on the basis of a surface and is defined in the parameter space of that surface. The basis curve is a curve defined in the two-dimensional parametric space of a reference basis surface. Although it is defined by a curve in two dimensional space, the variables involved are u and v, which occur in the parametric representation of the referenced surface, rather than the x, y, Cartesian coordinates.
The basis curve is only defined within the parametric range of the surface.
NOTE Corresponding ISO 10303 entity: pcurve. Please refer to ISO/IS 10303-42:1994, p.59 for the final definition of the formal standard. The definition of IfcPCurve derivates from pcurve. The following changes have been made: The BasisCurve replaces the definition of reference_to_curve since there is no requirement of having same dimensionality within the representation context.
HISTORY New class in IFC2x4.