// Created on: 1992-10-20 // Created by: Remi GILET // Copyright (c) 1992-1999 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_Lin2d2Tan_HeaderFile #define _Geom2dGcc_Lin2d2Tan_HeaderFile #include #include #include #include #include #include #include #include class Geom2dGcc_QualifiedCurve; class gp_Pnt2d; class gp_Lin2d; class Geom2dGcc_Lin2d2TanIter; class Geom2dAdaptor_Curve; //! This class implements the algorithms used to //! create 2d lines tangent to 2 other elements which //! can be circles, curves or points. //! More than one argument must be a curve. //! Describes functions for building a 2D line: //! - tangential to 2 curves, or //! - tangential to a curve and passing through a point. //! A Lin2d2Tan object provides a framework for: //! - defining the construction of 2D line(s), //! - implementing the construction algorithm, and //! - consulting the result(s). //! //! Note: Some constructors may check the type of the qualified argument //! and raise BadQualifier Error in case of incorrect couple (qualifier, curv). class Geom2dGcc_Lin2d2Tan { public: DEFINE_STANDARD_ALLOC //! This class implements the algorithms used to create 2d //! line tangent to two curves. //! Tolang is used to determine the tolerance for the tangency points. Standard_EXPORT Geom2dGcc_Lin2d2Tan(const Geom2dGcc_QualifiedCurve& Qualified1, const Geom2dGcc_QualifiedCurve& Qualified2, const Standard_Real Tolang); //! This class implements the algorithms used to create 2d //! lines passing through a point and tangent to a curve. //! Tolang is used to determine the tolerance for the tangency points. Standard_EXPORT Geom2dGcc_Lin2d2Tan(const Geom2dGcc_QualifiedCurve& Qualified1, const gp_Pnt2d& ThePoint, const Standard_Real Tolang); //! This class implements the algorithms used to create 2d //! line tangent to two curves. //! Tolang is used to determine the tolerance for the tangency points. //! Param1 is used for the initial guess on the first curve. //! Param2 is used for the initial guess on the second curve. Standard_EXPORT Geom2dGcc_Lin2d2Tan(const Geom2dGcc_QualifiedCurve& Qualified1, const Geom2dGcc_QualifiedCurve& Qualified2, const Standard_Real Tolang, const Standard_Real Param1, const Standard_Real Param2); //! This class implements the algorithms used to create 2d //! lines passing through a point and tangent to a curve. //! Tolang is used to determine the tolerance for the tangency points. //! Param2 is used for the initial guess on the curve. Standard_EXPORT Geom2dGcc_Lin2d2Tan(const Geom2dGcc_QualifiedCurve& Qualified1, const gp_Pnt2d& ThePoint, const Standard_Real Tolang, const Standard_Real Param1); //! Returns true if the construction algorithm does not fail //! (even if it finds no solution). //! 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 lines, representing solutions computed by this algorithm. //! Exceptions StdFail_NotDone if the construction fails.R Standard_EXPORT Standard_Integer NbSolutions() const; //! Returns a line, representing the solution of index Index computed by this algorithm. //! Warning //! This indexing simply provides a means of consulting the //! solutions. The index values are not associated with //! these solutions outside the context of the algorithm object. //! Exceptions //! Standard_OutOfRange if Index is less than zero or //! greater than the number of solutions computed by this algorithm. //! StdFail_NotDone if the construction fails. Standard_EXPORT gp_Lin2d ThisSolution (const Standard_Integer Index) const; //! Returns the qualifiers Qualif1 and Qualif2 of the //! tangency arguments for the solution of index Index //! computed by this algorithm. //! The returned qualifiers are: //! - those specified at the start of construction when the //! solutions are defined as enclosing or outside with //! respect to the arguments, or //! - those computed during construction (i.e. enclosing or //! outside) when the solutions are defined as unqualified //! with respect to the arguments, or //! - GccEnt_noqualifier if the tangency argument is a point. //! Exceptions //! Standard_OutOfRange if Index is less than zero or //! greater than the number of solutions computed by this algorithm. //! StdFail_NotDone if the construction fails. Standard_EXPORT void WhichQualifier (const Standard_Integer Index, 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. //! Exceptions //! Standard_OutOfRange if Index is less than zero or //! greater than the number of solutions computed by this algorithm. //! StdFail_NotDone if the construction fails. 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 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. //! Exceptions //! Standard_OutOfRange if Index is less than zero or //! greater than the number of solutions computed by this algorithm. //! StdFail_NotDone if the construction fails. Standard_EXPORT void Tangency2 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const; protected: private: Standard_EXPORT Standard_Boolean Add (const Standard_Integer theIndex, const Geom2dGcc_Lin2d2TanIter& theLin, const Standard_Real theTol, const Geom2dAdaptor_Curve& theC1, const Geom2dAdaptor_Curve& theC2); Standard_Boolean WellDone; Standard_Integer NbrSol; TColgp_Array1OfLin2d linsol; GccEnt_Array1OfPosition qualifier1; GccEnt_Array1OfPosition qualifier2; TColgp_Array1OfPnt2d pnttg1sol; TColgp_Array1OfPnt2d pnttg2sol; TColStd_Array1OfReal par1sol; TColStd_Array1OfReal par2sol; TColStd_Array1OfReal pararg1; TColStd_Array1OfReal pararg2; }; #endif // _Geom2dGcc_Lin2d2Tan_HeaderFile