// Created on: 1991-03-18 // 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 _GccAna_Circ2dTanCen_HeaderFile #define _GccAna_Circ2dTanCen_HeaderFile #include #include #include #include #include #include #include #include #include #include #include #include class Standard_NegativeValue; class Standard_OutOfRange; class StdFail_NotDone; class GccEnt_BadQualifier; class GccEnt_QualifiedCirc; class gp_Pnt2d; class gp_Lin2d; class gp_Circ2d; //! This class implements the algorithms used to //! create 2d circles tangent to an entity and //! centered on a point. //! The arguments of all construction methods are : //! - The qualified element for the tangency constrains //! (QualifiedCirc, Line, Point). //! - The center point Pcenter. //! - A real Tolerance. //! Tolerance is only used in the limits cases. //! For example : //! We want to create a circle tangent to an EnclosedCirc C1 //! with a tolerance Tolerance. //! If we did not used Tolerance it is impossible to //! find a solution in the the following case : Pcenter is //! outside C1. //! With Tolerance we will give a solution if the distance //! between C1 and Pcenter is lower than or equal Tolerance. class GccAna_Circ2dTanCen { public: DEFINE_STANDARD_ALLOC //! This method implements the algorithms used to //! create 2d circles tangent to a circle and //! centered on a point. Standard_EXPORT GccAna_Circ2dTanCen(const GccEnt_QualifiedCirc& Qualified1, const gp_Pnt2d& Pcenter, const Standard_Real Tolerance); //! This method implements the algorithms used to //! create 2d circles tangent to a line and //! centered on a point. Standard_EXPORT GccAna_Circ2dTanCen(const gp_Lin2d& Linetan, const gp_Pnt2d& Pcenter); //! This method implements the algorithms used to //! create 2d circles passing thrue a point and //! centered on a point. //! Tolerance is a tolerance criterion used by the algorithm //! to find a solution when, mathematically, the problem //! posed does not have a solution, but where there is //! numeric uncertainty attached to the arguments. //! In these algorithms Tolerance is only used in very //! specific cases where the center of the solution is very //! close to the circle to which it is tangential, and where the //! solution is therefore a very small circle. //! Exceptions //! GccEnt_BadQualifier if a qualifier is inconsistent with //! the argument it qualifies (for example, enclosing for a line). Standard_EXPORT GccAna_Circ2dTanCen(const gp_Pnt2d& Point1, const gp_Pnt2d& Pcenter); //! 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; //! Returns the number of circles, representing solutions //! computed by this algorithm and raises NotDone //! exception if the algorithm didn't succeed. Standard_EXPORT Standard_Integer NbSolutions() const; //! Returns the circle, representing the solution number Index and raises OutOfRange //! exception if Index is greater than the number of solutions. //! Be carefull: the Index is only a way to get all the //! solutions, but is not associated to theses outside the //! context of the algorithm-object. //! Raises NotDone if the construction algorithm didn't succeed. //! It raises OutOfRange if Index is greater than the //! number of solutions or less than zer Standard_EXPORT gp_Circ2d ThisSolution (const Standard_Integer Index) const; //! Returns the qualifier Qualif1 of the tangency argument //! for the solution of index Index computed by this algorithm. //! The returned qualifier is: //! - that specified at the start of construction when the //! solutions are defined as enclosed, enclosing or //! 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) const; //! Returns informations 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. //! It raises NotDone if the construction algorithm //! didn't succeed. //! It raises OutOfRange if Index is greater than the //! number of solutions or less than zero. Standard_EXPORT void Tangency1 (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 NotDone if the construction algorithm //! didn't succeed. //! It raises OutOfRange if Index is greater than the //! number of solutions or less than zero. Standard_EXPORT Standard_Boolean IsTheSame1 (const Standard_Integer Index) const; protected: private: Standard_Boolean WellDone; Standard_Integer NbrSol; TColgp_Array1OfCirc2d cirsol; GccEnt_Array1OfPosition qualifier1; TColStd_Array1OfInteger TheSame1; TColgp_Array1OfPnt2d pnttg1sol; TColStd_Array1OfReal par1sol; TColStd_Array1OfReal pararg1; }; #endif // _GccAna_Circ2dTanCen_HeaderFile