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 // Created on: 1992-09-28
 // Created by: Remi GILET
 // Copyright (c) 1992-1999 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 _GCE2d_MakeCircle_HeaderFile
 #define _GCE2d_MakeCircle_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <GCE2d_Root.hxx>
 #include <Geom2d_Circle.hxx>
 
 class gp_Circ2d;
 class gp_Ax2d;
 class gp_Ax22d;
 class gp_Pnt2d;
 
 //! This class implements the following algorithms used
 //! to create Circle from Geom2d.
 //!
 //! * Create a Circle parallel to another and passing
 //! though a point.
 //! * Create a Circle parallel to another at the distance
 //! Dist.
 //! * Create a Circle passing through 3 points.
 //! * Create a Circle with its center and the normal of its
 //! plane and its radius.
 //! * Create a Circle with its axis and radius.
 class GCE2d_MakeCircle : public GCE2d_Root
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! creates a circle from a non persistent one.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Circ2d& C);
 
   //! A is the "XAxis" of the circle which defines the origin
   //! of parametrization.
   //! It is not forbidden to create a circle with Radius = 0.0
   //! The status is "NegativeRadius" if Radius < 0.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Ax2d&         A,
                                    const Standard_Real    Radius,
                                    const Standard_Boolean Sense = Standard_True);
 
   //! A is the local coordinate system of the circle which defines
   //! the origin of parametrization.
   //! It is not forbidden to create a circle with Radius = 0.0
   //! The status is "NegativeRadius" if Radius < 0.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Ax22d& A, const Standard_Real Radius);
 
   //! Make a Circle from Geom2d <TheCirc> parallel to another
   //! Circ <Circ> with a distance <Dist>.
   //! If Dist is greater than zero the result is enclosing
   //! the circle <Circ>, else the result is enclosed by the
   //! circle <Circ>.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Circ2d& Circ, const Standard_Real Dist);
 
   //! Make a Circle from Geom2d <TheCirc> parallel to another
   //! Circ <Circ> and passing through a Pnt <Point>.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Circ2d& Circ, const gp_Pnt2d& Point);
 
   //! Make a Circ from gp <TheCirc> passing through 3
   //! Pnt2d <P1>,<P2>,<P3>.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Pnt2d& P1, const gp_Pnt2d& P2, const gp_Pnt2d& P3);
 
   //! Make a Circ from geom2d <TheCirc> by its center an radius.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Pnt2d&        P,
                                    const Standard_Real    Radius,
                                    const Standard_Boolean Sense = Standard_True);
 
   //! Makes a Circle from geom2d <TheCirc> with its center
   //! <Center> and a point giving the radius.
   //! If Sense is true the local coordinate system of
   //! the solution is direct and non direct in the other case.
   //! Warning
   //! The MakeCircle class does not prevent the
   //! construction of a circle with a null radius.
   //! If an error occurs (that is, when IsDone returns
   //! false), the Status function returns:
   //! -   gce_NegativeRadius if Radius is less than 0.0, or
   //! -   gce_IntersectionError if points P1, P2 and P3
   //! are collinear and the three are not coincident.
   Standard_EXPORT GCE2d_MakeCircle(const gp_Pnt2d&        Center,
                                    const gp_Pnt2d&        Point,
                                    const Standard_Boolean Sense = Standard_True);
 
   //! Returns the constructed circle.
   //! Exceptions StdFail_NotDone if no circle is constructed.
   Standard_EXPORT const Handle(Geom2d_Circle)& Value() const;
 
   operator const Handle(Geom2d_Circle) & () const { return Value(); }
 
 private:
   Handle(Geom2d_Circle) TheCircle;
 };
 
 #endif // _GCE2d_MakeCircle_HeaderFile

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