8.9.6.4 IfcBuildAxes
8.9.6.4.1 Semantic definition
8.9.6.4.2 Formal representation
FUNCTION IfcBuildAxes
(Axis, RefDirection : IfcDirection)
: LIST [3:3] OF IfcDirection;
LOCAL
D1, D2 : IfcDirection;
END_LOCAL;
D1 := NVL(IfcNormalise(Axis), IfcRepresentationItem() || IfcGeometricRepresentationItem () || IfcDirection([0.0,0.0,1.0]));
D2 := IfcFirstProjAxis(D1, RefDirection);
RETURN ([D2, IfcNormalise(IfcCrossProduct(D1,D2))\IfcVector.Orientation, D1]);
END_FUNCTION;
8.9.6.4.3 References