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 // Created on: 1991-03-29
 // Created by: Remi GILET
 // Copyright (c) 1991-1999 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 _Geom2dGcc_Circ2d2TanOnIter_HeaderFile
 #define _Geom2dGcc_Circ2d2TanOnIter_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 
 #include <gp_Circ2d.hxx>
 #include <GccEnt_Position.hxx>
 #include <gp_Pnt2d.hxx>
 class GccEnt_QualifiedCirc;
 class Geom2dGcc_QCurve;
 class gp_Lin2d;
 class GccEnt_QualifiedLin;
 class Geom2dAdaptor_Curve;
 
 //! This class implements the algorithms used to
 //! create 2d circles TANgent to 2 entities and
 //! having the center ON a curv.
 //! The order of the tangency argument is always
 //! QualifiedCirc, QualifiedLin, QualifiedCurv, Pnt2d.
 //! the arguments are :
 //! - The two tangency arguments.
 //! - The center line.
 //! - The parameter for each tangency argument which
 //! is a curve.
 //! - The tolerance.
 class Geom2dGcc_Circ2d2TanOnIter
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d circle and a curve and
   //! having the center ON a 2d line.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedCirc& Qualified1,
                                              const Geom2dGcc_QCurve&     Qualified2,
                                              const gp_Lin2d&             OnLine,
                                              const double                Param1,
                                              const double                Param2,
                                              const double                Param3,
                                              const double                Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d line and a curve and
   //! having the center ON a 2d line.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedLin& Qualified1,
                                              const Geom2dGcc_QCurve&    Qualified2,
                                              const gp_Lin2d&            OnLine,
                                              const double               Param1,
                                              const double               Param2,
                                              const double               Param3,
                                              const double               Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to two curves and
   //! having the center ON a 2d line.
   //! Param1 is the initial guess on the first QualifiedCurv.
   //! Param2 is the initial guess on the first QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve& Qualified1,
                                              const Geom2dGcc_QCurve& Qualified2,
                                              const gp_Lin2d&         OnLine,
                                              const double            Param1,
                                              const double            Param2,
                                              const double            Param3,
                                              const double            Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d point and a curve and
   //! having the center ON a 2d line.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve& Qualified1,
                                              const gp_Pnt2d&         Point2,
                                              const gp_Lin2d&         OnLine,
                                              const double            Param1,
                                              const double            Param2,
                                              const double            Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d circle and a curve and
   //! having the center ON a 2d circle.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedCirc& Qualified1,
                                              const Geom2dGcc_QCurve&     Qualified2,
                                              const gp_Circ2d&            OnCirc,
                                              const double                Param1,
                                              const double                Param2,
                                              const double                Param3,
                                              const double                Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d line and a curve and
   //! having the center ON a 2d circle.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedLin& Qualified1,
                                              const Geom2dGcc_QCurve&    Qualified2,
                                              const gp_Circ2d&           OnCirc,
                                              const double               Param1,
                                              const double               Param2,
                                              const double               Param3,
                                              const double               Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to two curves and
   //! having the center ON a 2d circle.
   //! Param1 is the initial guess on the first QualifiedCurv.
   //! Param2 is the initial guess on the first QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve& Qualified1,
                                              const Geom2dGcc_QCurve& Qualified2,
                                              const gp_Circ2d&        OnCirc,
                                              const double            Param1,
                                              const double            Param2,
                                              const double            Param3,
                                              const double            Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d point and a curve and
   //! having the center ON a 2d circle.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve& Qualified1,
                                              const gp_Pnt2d&         Point2,
                                              const gp_Circ2d&        OnCirc,
                                              const double            Param1,
                                              const double            Param2,
                                              const double            Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d circle and a curve and
   //! having the center ON a 2d curve.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! ParamOn is the initial guess on the center curve OnCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedCirc& Qualified1,
                                              const Geom2dGcc_QCurve&     Qualified2,
                                              const Geom2dAdaptor_Curve&  OnCurv,
                                              const double                Param1,
                                              const double                Param2,
                                              const double                ParamOn,
                                              const double                Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d line and a curve and
   //! having the center ON a 2d curve.
   //! Param2 is the initial guess on the curve QualifiedCurv.
   //! ParamOn is the initial guess on the center curve OnCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const GccEnt_QualifiedLin& Qualified1,
                                              const Geom2dGcc_QCurve&    Qualified2,
                                              const Geom2dAdaptor_Curve& OnCurve,
                                              const double               Param1,
                                              const double               Param2,
                                              const double               ParamOn,
                                              const double               Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d Point and a curve and
   //! having the center ON a 2d curve.
   //! Param1 is the initial guess on the curve QualifiedCurv.
   //! ParamOn is the initial guess on the center curve OnCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve&    Qualified1,
                                              const gp_Pnt2d&            Point2,
                                              const Geom2dAdaptor_Curve& OnCurve,
                                              const double               Param1,
                                              const double               ParamOn,
                                              const double               Tolerance);
 
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to two curves and
   //! having the center ON a 2d curve.
   //! Param1 is the initial guess on the first curve QualifiedCurv.
   //! Param1 is the initial guess on the second curve QualifiedCurv.
   //! ParamOn is the initial guess on the center curve OnCurv.
   //! Tolerance is used for the limit cases.
   Standard_EXPORT Geom2dGcc_Circ2d2TanOnIter(const Geom2dGcc_QCurve&    Qualified1,
                                              const Geom2dGcc_QCurve&    Qualified2,
                                              const Geom2dAdaptor_Curve& OnCurve,
                                              const double               Param1,
                                              const double               Param2,
                                              const double               ParamOn,
                                              const double               Tolerance);
 
   //! This method returns True if the construction
   //! algorithm succeeded.
   Standard_EXPORT bool IsDone() const;
 
   //! Returns the solution.
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT gp_Circ2d ThisSolution() const;
 
   Standard_EXPORT void WhichQualifier(GccEnt_Position& Qualif1, GccEnt_Position& Qualif2) const;
 
   //! Returns information about the tangency point between
   //! the result and the first argument.
   //! ParSol is the intrinsic parameter of the point PntSol
   //! on the solution curv.
   //! ParArg is the intrinsic parameter of the point PntSol
   //! on the argument curv.
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT void Tangency1(double& ParSol, double& ParArg, gp_Pnt2d& PntSol) const;
 
   //! Returns information about the tangency point between
   //! the result and the second argument.
   //! ParSol is the intrinsic parameter of the point PntSol
   //! on the solution curv.
   //! ParArg is the intrinsic parameter of the point PntSol
   //! on the argument curv.
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT void Tangency2(double& ParSol, double& ParArg, gp_Pnt2d& PntSol) const;
 
   //! Returns information about the center (on the curv) of the
   //! result and the third argument.
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT void CenterOn3(double& ParArg, gp_Pnt2d& PntSol) const;
 
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT bool IsTheSame1() const;
 
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT bool IsTheSame2() const;
 
 private:
   bool            WellDone;
   gp_Circ2d       cirsol;
   GccEnt_Position qualifier1;
   GccEnt_Position qualifier2;
   bool            TheSame1;
   bool            TheSame2;
   gp_Pnt2d        pnttg1sol;
   gp_Pnt2d        pnttg2sol;
   gp_Pnt2d        pntcen;
   double          par1sol;
   double          par2sol;
   double          pararg1;
   double          pararg2;
   double          parcen3;
 };
 
 #endif // _Geom2dGcc_Circ2d2TanOnIter_HeaderFile

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