Defined in File Ifc4.h
IfcLine: public Ifc4::IfcCurve¶
Definition from ISO/CD 10303-42:1992: A line is an unbounded curve with constant tangent direction. A line is defined by a point and a direction. The positive direction of the line is in the direction of the Dir vector. The line is parameterized as follows:
P = Pnt V = Dir λ(u) = P + uV
and the parametric range is:
∞ < u < ∞
NOTE Corresponding ISO 10303 entity: line. Please refer to ISO/IS 10303-42:1994, p.37 for the final definition of the formal standard. The derived attribute Dim has been added at this level and was therefore demoted from the geometric_representation_item.
HISTORY New class in IFC Release 1.0
The direction of the line, the magnitude and units of Dir affect the parameterization of the line.
- ::Ifc4::IfcVector *