Defined in File Ifc2x3.h
IfcDirection: public Ifc2x3::IfcGeometricRepresentationItem¶
Definition from ISO/CD 10303-42:1992: This entity defines a general direction vector in two or three dimensional space. The actual magnitudes of the components have no effect upon the direction being defined, only the ratios X:Y:Z or X:Y are significant.
NOTE: The components of this entity are not normalized. If a unit vector is required it should be normalized before use.
NOTE: Corresponding ISO 10303 entity: direction. Please refer to ISO/IS 10303-42:1994, p.26 for the final definition of the formal standard. The derived attribute Dim has been added (see also note at IfcGeometricRepresentationItem).
HISTORY: New entity in IFC Release 1.0
The components in the direction of X axis (DirectionRatios), of Y axis (DirectionRatios), and of Z axis (DirectionRatios)