IFC 4.3.0.1 (IFC4X3) development

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

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