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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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real Param3, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real ParamOn, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real ParamOn, const Standard_Real 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 Standard_Real Param1, const Standard_Real ParamOn, const Standard_Real 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 Standard_Real Param1, const Standard_Real Param2, const Standard_Real ParamOn, const Standard_Real Tolerance);
   
   //! This method returns True if the construction
   //! algorithm succeeded.
   Standard_EXPORT Standard_Boolean 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 (Standard_Real& ParSol, Standard_Real& 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 (Standard_Real& ParSol, Standard_Real& 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 (Standard_Real& ParArg, gp_Pnt2d& PntSol) const;
   
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT Standard_Boolean IsTheSame1() const;
   
   //! It raises NotDone if the construction algorithm
   //! didn't succeed.
   Standard_EXPORT Standard_Boolean IsTheSame2() const;
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
   Standard_Boolean WellDone;
   gp_Circ2d cirsol;
   GccEnt_Position qualifier1;
   GccEnt_Position qualifier2;
   Standard_Boolean TheSame1;
   Standard_Boolean TheSame2;
   gp_Pnt2d pnttg1sol;
   gp_Pnt2d pnttg2sol;
   gp_Pnt2d pntcen;
   Standard_Real par1sol;
   Standard_Real par2sol;
   Standard_Real pararg1;
   Standard_Real pararg2;
   Standard_Real parcen3;
 
 
 };
 
 
 
 
 
 
 
 #endif // _Geom2dGcc_Circ2d2TanOnIter_HeaderFile

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