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 // Created on: 1993-03-10
 // 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 _Geom_Direction_HeaderFile
 #define _Geom_Direction_HeaderFile
 
 #include <Standard.hxx>
 
 #include <Geom_Vector.hxx>
 #include <Standard_Real.hxx>
 class gp_Dir;
 class gp_Trsf;
 class Geom_Geometry;
 
 
 class Geom_Direction;
 DEFINE_STANDARD_HANDLE(Geom_Direction, Geom_Vector)
 
 
 //! The class Direction specifies a vector that is never null.
 //! It is a unit vector.
 class Geom_Direction : public Geom_Vector
 {
 
 public:
 
   
   //! Creates a unit vector with it 3 cartesian coordinates.
   //!
   //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
   Standard_EXPORT Geom_Direction(const Standard_Real X, const Standard_Real Y, const Standard_Real Z);
   
   //! Creates a transient copy of <me>.
   Standard_EXPORT Geom_Direction(const gp_Dir& V);
   
   //! Sets <me> to X,Y,Z coordinates.
   //!
   //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
   Standard_EXPORT void SetCoord (const Standard_Real X, const Standard_Real Y, const Standard_Real Z);
   
   //! Converts the gp_Dir unit vector V into this unit vector.
   Standard_EXPORT void SetDir (const gp_Dir& V);
   
   //! Changes the X coordinate of <me>.
   //!
   //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
   Standard_EXPORT void SetX (const Standard_Real X);
   
   //! Changes the Y coordinate of <me>.
   //!
   //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
   Standard_EXPORT void SetY (const Standard_Real Y);
   
   //! Changes the Z coordinate of <me>.
   //!
   //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
   Standard_EXPORT void SetZ (const Standard_Real Z);
   
 
   //! Returns the non transient direction with the same
   //! coordinates as <me>.
   Standard_EXPORT gp_Dir Dir() const;
   
   //! returns 1.0 which is the magnitude of any unit vector.
   Standard_EXPORT Standard_Real Magnitude() const Standard_OVERRIDE;
   
   //! returns 1.0 which is the square magnitude of any unit vector.
   Standard_EXPORT Standard_Real SquareMagnitude() const Standard_OVERRIDE;
   
 
   //! Computes the cross product between <me> and <Other>.
   //!
   //! Raised if the two vectors are parallel because it is
   //! not possible to have a direction with null length.
   Standard_EXPORT void Cross (const Handle(Geom_Vector)& Other) Standard_OVERRIDE;
   
 
   //! Computes the triple vector product  <me> ^(V1 ^ V2).
   //!
   //! Raised if V1 and V2 are parallel or <me> and (V1 ^ V2) are
   //! parallel
   Standard_EXPORT void CrossCross (const Handle(Geom_Vector)& V1, const Handle(Geom_Vector)& V2) Standard_OVERRIDE;
   
 
   //! Computes the cross product between <me> and <Other>.
   //! A new direction is returned.
   //!
   //! Raised if the two vectors are parallel because it is
   //! not possible to have a direction with null length.
   Standard_EXPORT Handle(Geom_Vector) Crossed (const Handle(Geom_Vector)& Other) const Standard_OVERRIDE;
   
 
   //! Computes the triple vector product <me> ^(V1 ^ V2).
   //!
   //! Raised if V1 and V2 are parallel or <me> and (V1 ^ V2) are
   //! parallel
   Standard_EXPORT Handle(Geom_Vector) CrossCrossed (const Handle(Geom_Vector)& V1, const Handle(Geom_Vector)& V2) const Standard_OVERRIDE;
   
   //! Applies the transformation T to this unit vector, then normalizes it.
   Standard_EXPORT void Transform (const gp_Trsf& T) Standard_OVERRIDE;
   
   //! Creates a new object which is a copy of this unit vector.
   Standard_EXPORT Handle(Geom_Geometry) Copy() const Standard_OVERRIDE;
 
 
 
 
   DEFINE_STANDARD_RTTIEXT(Geom_Direction,Geom_Vector)
 
 protected:
 
 
 
 
 private:
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _Geom_Direction_HeaderFile

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