IfcOrthogonalComplement

IfcOrthogonalComplement

Function Semantic Definition
Definition from ISO/CD 10303-42:1992: This function returns a direction which is the orthogonal complement of the input direction. The input direction must be a two-dimensional direction and the result is a vector of the same type and perpendicular to the input vector.

NOTE Corresponding STEP function orthogonal_component, new function in IFC Release 1.5. Please refer to ISO/IS 10303-42:1994, p. 101 for the final definition of the formal standard.

EXPRESS specification:

FUNCTION IfcOrthogonalComplement

  (Vec : IfcDirection)
    : IfcDirection;
LOCAL
  Result : IfcDirection ;
END_LOCAL;
  IF NOT EXISTS (Vec) OR (Vec.Dim <> 2) THEN
    RETURN(?);
  ELSE
    Result := IfcRepresentationItem() || IfcGeometricRepresentationItem () || IfcDirection([-Vec.DirectionRatios[2], Vec.DirectionRatios[1]]);
    RETURN(Result);
  END_IF;

END_FUNCTION;