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 // Created on: 1993-03-24
 // Created by: JCV
 // Copyright (c) 1993-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _Geom2d_Direction_HeaderFile
 #define _Geom2d_Direction_HeaderFile
 
 #include <Standard.hxx>
 
 #include <Geom2d_Vector.hxx>
 #include <Standard_Real.hxx>
 class gp_Dir2d;
 class gp_Trsf2d;
 class Geom2d_Geometry;
 
 
 class Geom2d_Direction;
 DEFINE_STANDARD_HANDLE(Geom2d_Direction, Geom2d_Vector)
 
 
 //! The class Direction specifies a vector that is never null.
 //! It is a unit vector.
 class Geom2d_Direction : public Geom2d_Vector
 {
 
 public:
 
   
   //! Creates a unit vector with it 2 cartesian coordinates.
   //!
   //! Raised if Sqrt( X*X + Y*Y) <= Resolution from gp.
   Standard_EXPORT Geom2d_Direction(const Standard_Real X, const Standard_Real Y);
   
   //! Creates a persistent copy of <me>.
   Standard_EXPORT Geom2d_Direction(const gp_Dir2d& V);
   
   //! Assigns the coordinates X and Y to this unit vector,
   //! then normalizes it.
   //! Exceptions
   //! Standard_ConstructionError if Sqrt(X*X +
   //! Y*Y) is less than or equal to gp::Resolution().
   Standard_EXPORT void SetCoord (const Standard_Real X, const Standard_Real Y);
   
   //! Converts the gp_Dir2d unit vector V into this unit vector.
   Standard_EXPORT void SetDir2d (const gp_Dir2d& V);
   
 
   //! Assigns a value to the X coordinate of this unit vector, then normalizes it.
   //! Exceptions
   //! Standard_ConstructionError if the value assigned
   //! causes the magnitude of the vector to become less
   //! than or equal to gp::Resolution().
   Standard_EXPORT void SetX (const Standard_Real X);
   
   //! Assigns a value to the Y coordinate of this unit vector, then normalizes it.
   //! Exceptions
   //! Standard_ConstructionError if the value assigned
   //! causes the magnitude of the vector to become less
   //! than or equal to gp::Resolution().
   Standard_EXPORT void SetY (const Standard_Real Y);
   
   //! Converts this unit vector into a gp_Dir2d unit vector.
   Standard_EXPORT gp_Dir2d Dir2d() const;
   
   //! returns 1.0
   Standard_EXPORT Standard_Real Magnitude() const Standard_OVERRIDE;
   
   //! returns 1.0
   Standard_EXPORT Standard_Real SquareMagnitude() const Standard_OVERRIDE;
   
   //! Computes the cross product between <me> and <Other>.
   Standard_EXPORT Standard_Real Crossed (const Handle(Geom2d_Vector)& Other) const Standard_OVERRIDE;
 Standard_Real operator ^ (const Handle(Geom2d_Vector)& Other) const
 {
   return Crossed(Other);
 }
   
   //! Applies the transformation T to this unit vector, then normalizes it.
   Standard_EXPORT void Transform (const gp_Trsf2d& T) Standard_OVERRIDE;
   
   //! Creates a new object which is a copy of this unit vector.
   Standard_EXPORT Handle(Geom2d_Geometry) Copy() const Standard_OVERRIDE;
 
 
 
 
   DEFINE_STANDARD_RTTIEXT(Geom2d_Direction,Geom2d_Vector)
 
 protected:
 
 
 
 
 private:
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _Geom2d_Direction_HeaderFile

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