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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_Circ2d2TanRadGeo_HeaderFile
 #define _Geom2dGcc_Circ2d2TanRadGeo_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 
 #include <Standard_Integer.hxx>
 #include <TColgp_Array1OfCirc2d.hxx>
 #include <GccEnt_Array1OfPosition.hxx>
 #include <TColStd_Array1OfInteger.hxx>
 #include <TColgp_Array1OfPnt2d.hxx>
 #include <TColStd_Array1OfReal.hxx>
 #include <GccEnt_Position.hxx>
 class GccEnt_QualifiedCirc;
 class Geom2dGcc_QCurve;
 class GccEnt_QualifiedLin;
 class gp_Pnt2d;
 class gp_Circ2d;
 
 
 //! This class implements the algorithms used to
 //! create 2d circles tangent to one curve and a
 //! point/line/circle/curv and with a given radius.
 //! For each construction methods arguments are:
 //! - Two Qualified elements for tangency constrains.
 //! (for example EnclosedCirc if we want the
 //! solution inside the argument EnclosedCirc).
 //! - Two Reals. One (Radius) for the radius and the
 //! other (Tolerance) for the tolerance.
 //! Tolerance is only used for the limit cases.
 //! For example :
 //! We want to create a circle inside a circle C1 and
 //! inside a curve Cu2 with a radius Radius and a
 //! tolerance Tolerance.
 //! If we did not used Tolerance it is impossible to
 //! find a solution in the following case : Cu2 is
 //! inside C1 and there is no intersection point
 //! between the two elements.
 //! With Tolerance we will get a solution if the
 //! lowest distance between C1 and Cu2 is lower than or
 //! equal Tolerance.
 class Geom2dGcc_Circ2d2TanRadGeo 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d circle and a curve
   //! with a radius of Radius.
   //! It raises NegativeValue if Radius is lower than zero.
   Standard_EXPORT Geom2dGcc_Circ2d2TanRadGeo(const GccEnt_QualifiedCirc& Qualified1, const Geom2dGcc_QCurve& Qualified2, const Standard_Real Radius, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a 2d line and a curve
   //! with a radius of Radius.
   //! It raises NegativeValue if Radius is lower than zero.
   Standard_EXPORT Geom2dGcc_Circ2d2TanRadGeo(const GccEnt_QualifiedLin& Qualified1, const Geom2dGcc_QCurve& Qualified2, const Standard_Real Radius, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to two curves with
   //! a radius of Radius.
   //! It raises NegativeValue if Radius is lower than zero.
   Standard_EXPORT Geom2dGcc_Circ2d2TanRadGeo(const Geom2dGcc_QCurve& Qualified1, const Geom2dGcc_QCurve& Qualified2, const Standard_Real Radius, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles TANgent to a curve and a point
   //! with a radius of Radius.
   //! It raises NegativeValue if Radius is lower than zero.
   Standard_EXPORT Geom2dGcc_Circ2d2TanRadGeo(const Geom2dGcc_QCurve& Qualified1, const gp_Pnt2d& Point2, const Standard_Real Radius, const Standard_Real Tolerance);
   
   //! This method returns True if the algorithm succeeded.
   Standard_EXPORT Standard_Boolean IsDone() const;
   
   //! This method returns the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT Standard_Integer NbSolutions() const;
   
   //! Returns the solution number Index.
   //! Be careful: the Index is only a way to get all the
   //! solutions, but is not associated to those outside the context
   //! of the algorithm-object.
   //! It raises OutOfRange exception if Index is greater
   //! than the number of solutions.
   //! It raises NotDone if the construction algorithm did not
   //! succeed.
   Standard_EXPORT gp_Circ2d ThisSolution (const Standard_Integer Index) const;
   
   //! It returns the information about the qualifiers of
   //! the tangency arguments concerning the solution number Index.
   //! It returns the real qualifiers (the qualifiers given to the
   //! constructor method in case of enclosed, enclosing and outside
   //! and the qualifiers computedin case of unqualified).
   Standard_EXPORT void WhichQualifier (const Standard_Integer Index, GccEnt_Position& Qualif1, GccEnt_Position& Qualif2) const;
   
   //! Returns information about the tangency point between the
   //! result number Index and the first argument.
   //! ParSol is the intrinsic parameter of the point PntSol on the solution.
   //! ParArg is the intrinsic parameter of the point PntSol on the first
   //! argument.
   //! It raises OutOfRange if Index is greater than the number
   //! of solutions.
   //! It raises NotDone if the construction algorithm did not
   //! succeed.
   Standard_EXPORT void Tangency1 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const;
   
   //! Returns information about the tangency point between the
   //! result number Index and the second argument.
   //! ParSol is the intrinsic parameter of the point PntSol on
   //! the solution.
   //! ParArg is the intrinsic parameter of the point PntArg on
   //! the second argument.
   //! It raises OutOfRange if Index is greater than the number
   //! of solutions.
   //! It raises NotDone if the construction algorithm did not
   //! succeed.
   Standard_EXPORT void Tangency2 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const;
   
   //! Returns True if the solution number Index is equal to
   //! the first argument.
   //! It raises OutOfRange if Index is greater than the number
   //! of solutions.
   //! It raises NotDone if the construction algorithm did not
   //! succeed.
   Standard_EXPORT Standard_Boolean IsTheSame1 (const Standard_Integer Index) const;
   
   //! Returns True if the solution number Index is equal to
   //! the second argument.
   //! It raises OutOfRange if Index is greater than the number
   //! of solutions.
   //! It raises NotDone if the construction algorithm did not
   //! succeed.
   Standard_EXPORT Standard_Boolean IsTheSame2 (const Standard_Integer Index) const;
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
   Standard_Boolean WellDone;
   Standard_Integer NbrSol;
   TColgp_Array1OfCirc2d cirsol;
   GccEnt_Array1OfPosition qualifier1;
   GccEnt_Array1OfPosition qualifier2;
   TColStd_Array1OfInteger TheSame1;
   TColStd_Array1OfInteger TheSame2;
   TColgp_Array1OfPnt2d pnttg1sol;
   TColgp_Array1OfPnt2d pnttg2sol;
   TColStd_Array1OfReal par1sol;
   TColStd_Array1OfReal par2sol;
   TColStd_Array1OfReal pararg1;
   TColStd_Array1OfReal pararg2;
 
 
 };
 
 
 
 
 
 
 
 #endif // _Geom2dGcc_Circ2d2TanRadGeo_HeaderFile

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