// 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_Circ2dTanOnRad_HeaderFile #define _Geom2dGcc_Circ2dTanOnRad_HeaderFile #include #include #include #include #include #include #include #include #include #include #include #include class Geom2dGcc_QualifiedCurve; class Geom2dAdaptor_Curve; class Geom2d_Point; class GccAna_Circ2dTanOnRad; class Geom2dGcc_Circ2dTanOnRadGeo; class gp_Circ2d; class gp_Pnt2d; //! This class implements the algorithms used to //! create a 2d circle tangent to a 2d entity, //! centered on a 2d entity and with a given radius. //! More than one argument must be a curve. //! The arguments of all construction methods are : //! - The qualified element for the tangency constrains //! (QualifiedCirc, QualifiedLin, QualifiedCurvPoints). //! - The Center element (circle, line, curve). //! - A real Tolerance. //! Tolerance is only used in the limits cases. //! For example : //! We want to create a circle tangent to an OutsideCurv Cu1 //! centered on a line OnLine with a radius Radius and with //! a tolerance Tolerance. //! If we did not used Tolerance it is impossible to //! find a solution in the following case : OnLine is //! outside Cu1. There is no intersection point between Cu1 //! and OnLine. The distance between the line and the //! circle is greater than Radius. //! With Tolerance we will give a solution if the //! distance between Cu1 and OnLine is lower than or //! equal Tolerance. class Geom2dGcc_Circ2dTanOnRad { public: DEFINE_STANDARD_ALLOC //! Constructs one or more 2D circles of radius Radius, //! centered on the 2D curve OnCurv and: //! - tangential to the curve Qualified1 Standard_EXPORT Geom2dGcc_Circ2dTanOnRad(const Geom2dGcc_QualifiedCurve& Qualified1, const Geom2dAdaptor_Curve& OnCurv, const Standard_Real Radius, const Standard_Real Tolerance); //! Constructs one or more 2D circles of radius Radius, //! centered on the 2D curve OnCurv and: //! passing through the point Point1. //! OnCurv is an adapted curve, i.e. an object which is an //! interface between: //! - the services provided by a 2D curve from the package Geom2d, //! - and those required on the curve by the construction algorithm. //! Similarly, the qualified curve Qualified1 is created from //! an adapted curve. //! Adapted curves are created in the following way: //! Handle(Geom2d_Curve) myCurveOn = ... ; //! Geom2dAdaptor_Curve OnCurv ( myCurveOn ) ; //! The algorithm is then constructed with this object: //! Handle(Geom2d_Curve) myCurve1 = ... //! ; //! Geom2dAdaptor_Curve Adapted1 ( myCurve1 ) ; //! Geom2dGcc_QualifiedCurve //! Qualified1 = Geom2dGcc::Outside(Adapted1); //! Standard_Real Radius = ... , Tolerance = ... ; //! Geom2dGcc_Circ2dTanOnRad //! myAlgo ( Qualified1 , OnCurv , Radius , Tolerance ) ; //! if ( myAlgo.IsDone() ) //! { Standard_Integer Nbr = myAlgo.NbSolutions() ; //! gp_Circ2d Circ ; //! for ( Standard_Integer i = 1 ; //! i <= nbr ; i++ ) //! { Circ = myAlgo.ThisSolution (i) ; //! ... //! } //! } Standard_EXPORT Geom2dGcc_Circ2dTanOnRad(const Handle(Geom2d_Point)& Point1, const Geom2dAdaptor_Curve& OnCurv, const Standard_Real Radius, const Standard_Real Tolerance); Standard_EXPORT void Results (const GccAna_Circ2dTanOnRad& Circ); Standard_EXPORT void Results (const Geom2dGcc_Circ2dTanOnRadGeo& Circ); //! 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 circles, representing solutions //! computed by this algorithm. //! Exceptions: StdFail_NotDone if the construction fails. 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 these 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_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 //! outside with respect to the arguments, or //! - that computed during construction (i.e. enclosed, //! 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) const; //! Returns information about the tangency point between the //! result number Index and the first argument. //! ParSol is the intrinsic parameter of the point on the solution curv. //! ParArg is the intrinsic parameter of the point on the argument curv. //! PntSol is the tangency point on the solution curv. //! PntArg is the tangency point 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 the center PntSol on the second argument (i.e. //! line or circle) of the solution of index Index computed by //! this algorithm. //! ParArg is the intrinsic parameter of the point on the argument curv. //! PntSol is the center point of the solution curv. //! PntArg is the projection of 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 CenterOn3 (const Standard_Integer Index, Standard_Real& ParArg, gp_Pnt2d& PntSol) const; //! Returns true if the solution of index Index and the first //! argument of this algorithm are the same (i.e. there are 2 //! identical circles). //! If Rarg is the radius of the first argument, Rsol is the //! radius of the solution and dist is the distance between //! the two centers, we consider the two circles to be //! identical if |Rarg - Rsol| and dist are less than //! or equal to the tolerance criterion given at the time of //! construction of this algorithm. //! OutOfRange is raised if Index is greater than the number of solutions. //! notDone is raised if the construction algorithm did not succeed. 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; TColgp_Array1OfPnt2d pntcen3; TColStd_Array1OfReal parcen3; }; #endif // _Geom2dGcc_Circ2dTanOnRad_HeaderFile