Defined in File Ifc4x1.h
IfcPlaneAngleMeasure: public IfcUtil::IfcBaseType¶
Definition from ISO/CD 10303-41:1992: A plane angle measure is the value of an angle in a plane.
Usually measured in radian (rad, m/m = 1), but also grads may be used. The grad unit may be declared as a conversion based unit based on radian unit.
NOTE IfcPlaneAngleMeasure is used where angles need to be described to an accuracy of less than one degree and expressed as decimal parts of an angle. It is widely used for angular measurement except for situations where accuracy needs to be defined using arc measurement; for which purpose the IfcCompoundPlaneAngleMeasure is provided.
NOTE Corresponding ISO 10303 name: plane_angle_measure, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
HISTORY New type in IFC Release 1.5.1.
Subclassed by Ifc4x1::IfcPositivePlaneAngleMeasure
operator double() const¶