// 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_Lin2dTanObl_HeaderFile #define _Geom2dGcc_Lin2dTanObl_HeaderFile #include #include #include #include #include #include #include #include #include #include #include class Geom2dGcc_QualifiedCurve; class gp_Lin2d; class gp_Pnt2d; class Geom2dGcc_Lin2dTanOblIter; class Geom2dAdaptor_Curve; //! This class implements the algorithms used to //! create 2d line tangent to a curve QualifiedCurv and //! doing an angle Angle with a line TheLin. //! The angle must be in Radian. //! Describes functions for building a 2D line making a given //! angle with a line and tangential to a curve. //! A Lin2dTanObl object provides a framework for: //! - defining the construction of 2D line(s), //! - implementing the construction algorithm, and //! - consulting the result(s). class Geom2dGcc_Lin2dTanObl { public: DEFINE_STANDARD_ALLOC //! This class implements the algorithm used to //! create 2d line tangent to a curve and doing an //! angle Angle with the line TheLin. //! Angle must be in Radian. //! Tolang is the angular tolerance. Standard_EXPORT Geom2dGcc_Lin2dTanObl(const Geom2dGcc_QualifiedCurve& Qualified1, const gp_Lin2d& TheLin, const Standard_Real TolAng, const Standard_Real Angle); //! This class implements the algorithm used to //! create 2d line tangent to a curve and doing an //! angle Angle with the line TheLin. //! Angle must be in Radian. //! Param2 is the initial guess on the curve QualifiedCurv. //! Tolang is the angular tolerance. //! Warning //! An iterative algorithm is used if Qualified1 is more //! complex than a line or a circle. In such cases, the //! algorithm constructs only one solution. //! Exceptions //! GccEnt_BadQualifier if a qualifier is inconsistent with //! the argument it qualifies (for example, enclosed for a circle). Standard_EXPORT Geom2dGcc_Lin2dTanObl(const Geom2dGcc_QualifiedCurve& Qualified1, const gp_Lin2d& TheLin, const Standard_Real TolAng, const Standard_Real Param1, const Standard_Real Angle); //! 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. Standard_EXPORT Standard_Integer NbSolutions() const; //! Returns a line, representing the solution of index Index //! computed by this algorithm. //! 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 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 enclosing or outside with //! respect to the argument, or //! - that computed during construction (i.e. enclosing or //! outside) when the solutions are defined as unqualified //! with respect to the argument, 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) 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. Standard_EXPORT void Tangency1 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const; //! Returns the point of intersection PntSol between the //! solution of index Index and the second argument (the line) of this algorithm. //! ParSol is the parameter of the point PntSol on the //! solution. ParArg is the parameter of the point PntSol on the second argument (the line). //! Exceptions //! StdFail_NotDone if the construction fails. //! Geom2dGcc_IsParallel if the solution and the second //! argument (the line) are parallel. //! Standard_OutOfRange if Index is less than zero or //! greater than the number of solutions computed by this algorithm. Standard_EXPORT void Intersection2 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const; //! Returns true if the line and the solution are parallel. This //! is the case when the angle given at the time of //! construction is equal to 0 or Pi. //! Exceptions StdFail_NotDone if the construction fails. Standard_EXPORT Standard_Boolean IsParallel2() const; protected: private: Standard_EXPORT Standard_Boolean Add (const Standard_Integer theIndex, const Geom2dGcc_Lin2dTanOblIter& theLin, const Standard_Real theTol, const Geom2dAdaptor_Curve& theC1); Standard_Boolean WellDone; Standard_Boolean Paral2; Standard_Integer NbrSol; TColgp_Array1OfLin2d linsol; GccEnt_Array1OfPosition qualifier1; TColgp_Array1OfPnt2d pnttg1sol; TColgp_Array1OfPnt2d pntint2sol; TColStd_Array1OfReal par1sol; TColStd_Array1OfReal par2sol; TColStd_Array1OfReal pararg1; TColStd_Array1OfReal pararg2; }; #endif // _Geom2dGcc_Lin2dTanObl_HeaderFile