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 // Created on: 1991-03-18
 // Created by: Remy 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 _GccAna_Circ2d3Tan_HeaderFile
 #define _GccAna_Circ2d3Tan_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 GccEnt_QualifiedLin;
 class gp_Pnt2d;
 class gp_Circ2d;
 
 
 //! This class implements the algorithms used to
 //! create 2d circles tangent to 3 points/lines/circles.
 //! The arguments of all construction methods are :
 //! - The three qualified elements for the
 //! tangency constraints (QualifiedCirc, QualifiedLine,
 //! Points).
 //! - A real Tolerance.
 //! Tolerance is only used in the limit cases.
 //! For example :
 //! We want to create a circle tangent to an UnqualifiedCirc
 //! C1 and an UnqualifiedCirc C2 and an UnqualifiedCirc C3
 //! with a tolerance Tolerance.
 //! If we do not use Tolerance it is impossible to find
 //! a solution in the following case : C2 is inside C1
 //! and there is no intersection point between the two
 //! circles, and C3 is completely outside C1.
 //! With Tolerance we will find a solution if the
 //! lowest distance between C1 and C2 is lower than or
 //! equal Tolerance.
 class GccAna_Circ2d3Tan 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 3 circles.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const GccEnt_QualifiedCirc& Qualified2, const GccEnt_QualifiedCirc& Qualified3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 2 circles and 1 line.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const GccEnt_QualifiedCirc& Qualified2, const GccEnt_QualifiedLin& Qualified3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 1 circle and 2 lines.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const GccEnt_QualifiedLin& Qualified2, const GccEnt_QualifiedLin& Qualified3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 3 lines.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedLin& Qualified1, const GccEnt_QualifiedLin& Qualified2, const GccEnt_QualifiedLin& Qualified3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 2 circles and 1 Point.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const GccEnt_QualifiedCirc& Qualified2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to a circle and a line and
   //! 1 Point.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const GccEnt_QualifiedLin& Qualified2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to 2 lines and 1 Point.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedLin& Qualified1, const GccEnt_QualifiedLin& Qualified2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to a circle and passing
   //! through 2 Points.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedCirc& Qualified1, const gp_Pnt2d& Point2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles tangent to a line and passing
   //! through 2 Points.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const GccEnt_QualifiedLin& Qualified1, const gp_Pnt2d& Point2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method implements the algorithms used to
   //! create 2d circles passing through 3 Points.
   //! ConstructionError is raised if there is a problem during
   //! the computation.
   Standard_EXPORT GccAna_Circ2d3Tan(const gp_Pnt2d& Point1, const gp_Pnt2d& Point2, const gp_Pnt2d& Point3, const Standard_Real Tolerance);
   
   //! This method returns True if the construction
   //! algorithm succeeded.
   //! Note: IsDone protects against a failure arising from a
   //! more internal intersection algorithm, which has
   //! reached its numeric limits.
   Standard_EXPORT Standard_Boolean IsDone() const;
   
   //! This method returns the number of solutions.
   //! Raises NotDone if the construction algorithm didn't succeed.
   Standard_EXPORT Standard_Integer NbSolutions() const;
   
   //! Returns the solution number Index and raises OutOfRange
   //! exception if Index is greater than the number of
   //! solutions.
   //! 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.
   //! Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT gp_Circ2d ThisSolution (const Standard_Integer Index) const;
   
   //! 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, GccEnt_Position& Qualif3) 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 curv.
   //! ParArg is the intrinsic parameter of the point PntArg
   //! on the argument curv. Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   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 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. Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT void Tangency2 (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 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. Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT void Tangency3 (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. Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT Standard_Boolean IsTheSame1 (const Standard_Integer Index) const;
   
   //! Returns True if the solution number Index is equal to
   //! the second argument. Raises OutOfRange Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT Standard_Boolean IsTheSame2 (const Standard_Integer Index) const;
   
   //! Returns True if the solution number Index is equal to
   //! the third argument. Raises OutOfRange if Index is greater than
   //! the number of solutions.
   //! It raises NotDone if the algorithm failed.
   Standard_EXPORT Standard_Boolean IsTheSame3 (const Standard_Integer Index) const;
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
   Standard_Boolean WellDone;
   Standard_Integer NbrSol;
   TColgp_Array1OfCirc2d cirsol;
   GccEnt_Array1OfPosition qualifier1;
   GccEnt_Array1OfPosition qualifier2;
   GccEnt_Array1OfPosition qualifier3;
   TColStd_Array1OfInteger TheSame1;
   TColStd_Array1OfInteger TheSame2;
   TColStd_Array1OfInteger TheSame3;
   TColgp_Array1OfPnt2d pnttg1sol;
   TColgp_Array1OfPnt2d pnttg2sol;
   TColgp_Array1OfPnt2d pnttg3sol;
   TColStd_Array1OfReal par1sol;
   TColStd_Array1OfReal par2sol;
   TColStd_Array1OfReal par3sol;
   TColStd_Array1OfReal pararg1;
   TColStd_Array1OfReal pararg2;
   TColStd_Array1OfReal pararg3;
 
 
 };
 
 
 
 
 
 
 
 #endif // _GccAna_Circ2d3Tan_HeaderFile

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