IfcOrthogonalComplement

BACnet MVD

#### IfcOrthogonalComplement

Natural language names

| Orthogonal Complement

##### Semantic definitions at the function

Function Definition

> NOTE Definition according to 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 Function adapted from orthogonal_complement defined in ISO 10303-42.

> HISTORY New function in IFC1.5

##### Formal representations

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;

`

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