// Created on: 1991-09-10 // Created by: Michel Chauvat // 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 _ElCLib_HeaderFile #define _ElCLib_HeaderFile #include #include #include #include #include #include #include class gp_Pnt; class gp_Lin; class gp_Circ; class gp_Elips; class gp_Hypr; class gp_Parab; class gp_Vec; class gp_Lin2d; class gp_Circ2d; class gp_Elips2d; class gp_Hypr2d; class gp_Parab2d; class gp_Pnt2d; class gp_Vec2d; class gp_Ax1; class gp_Ax2; class gp_Ax2d; class gp_Ax22d; class gp_Dir; class gp_Dir2d; //! Provides functions for basic geometric computations on //! elementary curves such as conics and lines in 2D and 3D space. //! This includes: //! - calculation of a point or derived vector on a 2D or //! 3D curve where: //! - the curve is provided by the gp package, or //! defined in reference form (as in the gp package), //! and //! - the point is defined by a parameter, //! - evaluation of the parameter corresponding to a point //! on a 2D or 3D curve from gp, //! - various elementary computations which allow you to //! position parameterized values within the period of a curve. //! Notes: //! - ElCLib stands for Elementary Curves Library. //! - If the curves provided by the gp package are not //! explicitly parameterized, they still have an implicit //! parameterization, analogous to that which they infer //! for the equivalent Geom or Geom2d curves. class ElCLib { public: DEFINE_STANDARD_ALLOC //! Return a value in the range by //! adding or removing the period to //! . //! ATTENTION!!! //! It is expected but not checked that (ULast > UFirst) Standard_EXPORT static Standard_Real InPeriod (const Standard_Real U, const Standard_Real UFirst, const Standard_Real ULast); //! Adjust U1 and U2 in the parametric range UFirst //! Ulast of a periodic curve, where ULast - //! UFirst is its period. To do this, this function: //! - sets U1 in the range [ UFirst, ULast ] by //! adding/removing the period to/from the value U1, then //! - sets U2 in the range [ U1, U1 + period ] by //! adding/removing the period to/from the value U2. //! Precision is used to test the equalities. Standard_EXPORT static void AdjustPeriodic (const Standard_Real UFirst, const Standard_Real ULast, const Standard_Real Precision, Standard_Real& U1, Standard_Real& U2); //! For elementary curves (lines, circles and conics) from //! the gp package, computes the point of parameter U. //! The result is either: //! - a gp_Pnt point for a curve in 3D space, or //! - a gp_Pnt2d point for a curve in 2D space. static gp_Pnt Value (const Standard_Real U, const gp_Lin& L); static gp_Pnt Value (const Standard_Real U, const gp_Circ& C); static gp_Pnt Value (const Standard_Real U, const gp_Elips& E); static gp_Pnt Value (const Standard_Real U, const gp_Hypr& H); static gp_Pnt Value (const Standard_Real U, const gp_Parab& Prb); //! For elementary curves (lines, circles and conics) from the //! gp package, computes: //! - the point P of parameter U, and //! - the first derivative vector V1 at this point. //! The results P and V1 are either: //! - a gp_Pnt point and a gp_Vec vector, for a curve in 3D space, or //! - a gp_Pnt2d point and a gp_Vec2d vector, for a curve in 2D space. static void D1 (const Standard_Real U, const gp_Lin& L, gp_Pnt& P, gp_Vec& V1); static void D1 (const Standard_Real U, const gp_Circ& C, gp_Pnt& P, gp_Vec& V1); static void D1 (const Standard_Real U, const gp_Elips& E, gp_Pnt& P, gp_Vec& V1); static void D1 (const Standard_Real U, const gp_Hypr& H, gp_Pnt& P, gp_Vec& V1); static void D1 (const Standard_Real U, const gp_Parab& Prb, gp_Pnt& P, gp_Vec& V1); //! For elementary curves (circles and conics) from the gp //! package, computes: //! - the point P of parameter U, and //! - the first and second derivative vectors V1 and V2 at this point. //! The results, P, V1 and V2, are either: //! - a gp_Pnt point and two gp_Vec vectors, for a curve in 3D space, or //! - a gp_Pnt2d point and two gp_Vec2d vectors, for a curve in 2D space. static void D2 (const Standard_Real U, const gp_Circ& C, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); static void D2 (const Standard_Real U, const gp_Elips& E, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); static void D2 (const Standard_Real U, const gp_Hypr& H, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); static void D2 (const Standard_Real U, const gp_Parab& Prb, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); //! For elementary curves (circles, ellipses and hyperbolae) //! from the gp package, computes: //! - the point P of parameter U, and //! - the first, second and third derivative vectors V1, V2 //! and V3 at this point. //! The results, P, V1, V2 and V3, are either: //! - a gp_Pnt point and three gp_Vec vectors, for a curve in 3D space, or //! - a gp_Pnt2d point and three gp_Vec2d vectors, for a curve in 2D space. static void D3 (const Standard_Real U, const gp_Circ& C, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); static void D3 (const Standard_Real U, const gp_Elips& E, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); static void D3 (const Standard_Real U, const gp_Hypr& H, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); //! For elementary curves (lines, circles and conics) from //! the gp package, computes the vector corresponding to //! the Nth derivative at the point of parameter U. The result is either: //! - a gp_Vec vector for a curve in 3D space, or //! - a gp_Vec2d vector for a curve in 2D space. //! In the following functions N is the order of derivation //! and should be greater than 0 static gp_Vec DN (const Standard_Real U, const gp_Lin& L, const Standard_Integer N); static gp_Vec DN (const Standard_Real U, const gp_Circ& C, const Standard_Integer N); static gp_Vec DN (const Standard_Real U, const gp_Elips& E, const Standard_Integer N); static gp_Vec DN (const Standard_Real U, const gp_Hypr& H, const Standard_Integer N); static gp_Vec DN (const Standard_Real U, const gp_Parab& Prb, const Standard_Integer N); static gp_Pnt2d Value (const Standard_Real U, const gp_Lin2d& L); static gp_Pnt2d Value (const Standard_Real U, const gp_Circ2d& C); static gp_Pnt2d Value (const Standard_Real U, const gp_Elips2d& E); static gp_Pnt2d Value (const Standard_Real U, const gp_Hypr2d& H); static gp_Pnt2d Value (const Standard_Real U, const gp_Parab2d& Prb); static void D1 (const Standard_Real U, const gp_Lin2d& L, gp_Pnt2d& P, gp_Vec2d& V1); static void D1 (const Standard_Real U, const gp_Circ2d& C, gp_Pnt2d& P, gp_Vec2d& V1); static void D1 (const Standard_Real U, const gp_Elips2d& E, gp_Pnt2d& P, gp_Vec2d& V1); static void D1 (const Standard_Real U, const gp_Hypr2d& H, gp_Pnt2d& P, gp_Vec2d& V1); static void D1 (const Standard_Real U, const gp_Parab2d& Prb, gp_Pnt2d& P, gp_Vec2d& V1); static void D2 (const Standard_Real U, const gp_Circ2d& C, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); static void D2 (const Standard_Real U, const gp_Elips2d& E, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); static void D2 (const Standard_Real U, const gp_Hypr2d& H, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); static void D2 (const Standard_Real U, const gp_Parab2d& Prb, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); static void D3 (const Standard_Real U, const gp_Circ2d& C, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); static void D3 (const Standard_Real U, const gp_Elips2d& E, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); //! In the following functions N is the order of derivation //! and should be greater than 0 static void D3 (const Standard_Real U, const gp_Hypr2d& H, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); static gp_Vec2d DN (const Standard_Real U, const gp_Lin2d& L, const Standard_Integer N); static gp_Vec2d DN (const Standard_Real U, const gp_Circ2d& C, const Standard_Integer N); static gp_Vec2d DN (const Standard_Real U, const gp_Elips2d& E, const Standard_Integer N); static gp_Vec2d DN (const Standard_Real U, const gp_Hypr2d& H, const Standard_Integer N); static gp_Vec2d DN (const Standard_Real U, const gp_Parab2d& Prb, const Standard_Integer N); //! Curve evaluation //! The following basis functions compute the derivatives on //! elementary curves defined by their geometric characteristics. //! These functions can be called without constructing a conic //! from package gp. They are called by the previous functions. //! Example : //! A circle is defined by its position and its radius. Standard_EXPORT static gp_Pnt LineValue (const Standard_Real U, const gp_Ax1& Pos); Standard_EXPORT static gp_Pnt CircleValue (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Radius); Standard_EXPORT static gp_Pnt EllipseValue (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius); Standard_EXPORT static gp_Pnt HyperbolaValue (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius); Standard_EXPORT static gp_Pnt ParabolaValue (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Focal); Standard_EXPORT static void LineD1 (const Standard_Real U, const gp_Ax1& Pos, gp_Pnt& P, gp_Vec& V1); Standard_EXPORT static void CircleD1 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Radius, gp_Pnt& P, gp_Vec& V1); Standard_EXPORT static void EllipseD1 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1); Standard_EXPORT static void HyperbolaD1 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1); Standard_EXPORT static void ParabolaD1 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Focal, gp_Pnt& P, gp_Vec& V1); Standard_EXPORT static void CircleD2 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Radius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); Standard_EXPORT static void EllipseD2 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); Standard_EXPORT static void HyperbolaD2 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); Standard_EXPORT static void ParabolaD2 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Focal, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2); Standard_EXPORT static void CircleD3 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Radius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); Standard_EXPORT static void EllipseD3 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); Standard_EXPORT static void HyperbolaD3 (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3); //! In the following functions N is the order of derivation //! and should be greater than 0 Standard_EXPORT static gp_Vec LineDN (const Standard_Real U, const gp_Ax1& Pos, const Standard_Integer N); Standard_EXPORT static gp_Vec CircleDN (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Radius, const Standard_Integer N); Standard_EXPORT static gp_Vec EllipseDN (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const Standard_Integer N); Standard_EXPORT static gp_Vec HyperbolaDN (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const Standard_Integer N); Standard_EXPORT static gp_Vec ParabolaDN (const Standard_Real U, const gp_Ax2& Pos, const Standard_Real Focal, const Standard_Integer N); Standard_EXPORT static gp_Pnt2d LineValue (const Standard_Real U, const gp_Ax2d& Pos); Standard_EXPORT static gp_Pnt2d CircleValue (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Radius); Standard_EXPORT static gp_Pnt2d EllipseValue (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius); Standard_EXPORT static gp_Pnt2d HyperbolaValue (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius); Standard_EXPORT static gp_Pnt2d ParabolaValue (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Focal); Standard_EXPORT static void LineD1 (const Standard_Real U, const gp_Ax2d& Pos, gp_Pnt2d& P, gp_Vec2d& V1); Standard_EXPORT static void CircleD1 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Radius, gp_Pnt2d& P, gp_Vec2d& V1); Standard_EXPORT static void EllipseD1 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1); Standard_EXPORT static void HyperbolaD1 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1); Standard_EXPORT static void ParabolaD1 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Focal, gp_Pnt2d& P, gp_Vec2d& V1); Standard_EXPORT static void CircleD2 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Radius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); Standard_EXPORT static void EllipseD2 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); Standard_EXPORT static void HyperbolaD2 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); Standard_EXPORT static void ParabolaD2 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Focal, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2); Standard_EXPORT static void CircleD3 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Radius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); Standard_EXPORT static void EllipseD3 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); //! In the following functions N is the order of derivation //! and should be greater than 0 Standard_EXPORT static void HyperbolaD3 (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3); Standard_EXPORT static gp_Vec2d LineDN (const Standard_Real U, const gp_Ax2d& Pos, const Standard_Integer N); Standard_EXPORT static gp_Vec2d CircleDN (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Radius, const Standard_Integer N); Standard_EXPORT static gp_Vec2d EllipseDN (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const Standard_Integer N); Standard_EXPORT static gp_Vec2d HyperbolaDN (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const Standard_Integer N); //! The following functions compute the parametric value corresponding //! to a given point on a elementary curve. The point should be on the //! curve. Standard_EXPORT static gp_Vec2d ParabolaDN (const Standard_Real U, const gp_Ax22d& Pos, const Standard_Real Focal, const Standard_Integer N); //! Computes the parameter value of the point P on the given curve. //! Note: In its local coordinate system, the parametric //! equation of the curve is given by the following: //! - for the line L: P(U) = Po + U*Vo //! where Po is the origin and Vo the unit vector of its positioning axis. //! - for the circle C: X(U) = Radius*Cos(U), Y(U) = Radius*Sin(U) //! - for the ellipse E: X(U) = MajorRadius*Cos(U). Y(U) = MinorRadius*Sin(U) //! - for the hyperbola H: X(U) = MajorRadius*Ch(U), Y(U) = MinorRadius*Sh(U) //! - for the parabola Prb: //! X(U) = U**2 / (2*p) //! Y(U) = U //! where p is the distance between the focus and the directrix. //! Warning //! The point P must be on the curve. These functions are //! not protected, however, and if point P is not on the //! curve, an exception may be raised. static Standard_Real Parameter (const gp_Lin& L, const gp_Pnt& P); //! parametrization //! P (U) = L.Location() + U * L.Direction() static Standard_Real Parameter (const gp_Lin2d& L, const gp_Pnt2d& P); static Standard_Real Parameter (const gp_Circ& C, const gp_Pnt& P); //! parametrization //! In the local coordinate system of the circle //! X (U) = Radius * Cos (U) //! Y (U) = Radius * Sin (U) static Standard_Real Parameter (const gp_Circ2d& C, const gp_Pnt2d& P); static Standard_Real Parameter (const gp_Elips& E, const gp_Pnt& P); //! parametrization //! In the local coordinate system of the Ellipse //! X (U) = MajorRadius * Cos (U) //! Y (U) = MinorRadius * Sin (U) static Standard_Real Parameter (const gp_Elips2d& E, const gp_Pnt2d& P); static Standard_Real Parameter (const gp_Hypr& H, const gp_Pnt& P); //! parametrization //! In the local coordinate system of the Hyperbola //! X (U) = MajorRadius * Ch (U) //! Y (U) = MinorRadius * Sh (U) static Standard_Real Parameter (const gp_Hypr2d& H, const gp_Pnt2d& P); static Standard_Real Parameter (const gp_Parab& Prb, const gp_Pnt& P); //! parametrization //! In the local coordinate system of the parabola //! Y**2 = (2*P) * X where P is the distance between the focus //! and the directrix. static Standard_Real Parameter (const gp_Parab2d& Prb, const gp_Pnt2d& P); Standard_EXPORT static Standard_Real LineParameter (const gp_Ax1& Pos, const gp_Pnt& P); //! parametrization //! P (U) = L.Location() + U * L.Direction() Standard_EXPORT static Standard_Real LineParameter (const gp_Ax2d& Pos, const gp_Pnt2d& P); Standard_EXPORT static Standard_Real CircleParameter (const gp_Ax2& Pos, const gp_Pnt& P); //! Pos is the Axis of the Circle //! parametrization //! In the local coordinate system of the circle //! X (U) = Radius * Cos (U) //! Y (U) = Radius * Sin (U) Standard_EXPORT static Standard_Real CircleParameter (const gp_Ax22d& Pos, const gp_Pnt2d& P); Standard_EXPORT static Standard_Real EllipseParameter (const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const gp_Pnt& P); //! Pos is the Axis of the Ellipse //! parametrization //! In the local coordinate system of the Ellipse //! X (U) = MajorRadius * Cos (U) //! Y (U) = MinorRadius * Sin (U) Standard_EXPORT static Standard_Real EllipseParameter (const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const gp_Pnt2d& P); Standard_EXPORT static Standard_Real HyperbolaParameter (const gp_Ax2& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const gp_Pnt& P); //! Pos is the Axis of the Hyperbola //! parametrization //! In the local coordinate system of the Hyperbola //! X (U) = MajorRadius * Ch (U) //! Y (U) = MinorRadius * Sh (U) Standard_EXPORT static Standard_Real HyperbolaParameter (const gp_Ax22d& Pos, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const gp_Pnt2d& P); Standard_EXPORT static Standard_Real ParabolaParameter (const gp_Ax2& Pos, const gp_Pnt& P); //! Pos is the mirror axis of the parabola //! parametrization //! In the local coordinate system of the parabola //! Y**2 = (2*P) * X where P is the distance between the focus //! and the directrix. //! The following functions build a 3d curve from a //! 2d curve at a given position defined with an Ax2. Standard_EXPORT static Standard_Real ParabolaParameter (const gp_Ax22d& Pos, const gp_Pnt2d& P); Standard_EXPORT static gp_Pnt To3d (const gp_Ax2& Pos, const gp_Pnt2d& P); Standard_EXPORT static gp_Vec To3d (const gp_Ax2& Pos, const gp_Vec2d& V); Standard_EXPORT static gp_Dir To3d (const gp_Ax2& Pos, const gp_Dir2d& V); Standard_EXPORT static gp_Ax1 To3d (const gp_Ax2& Pos, const gp_Ax2d& A); Standard_EXPORT static gp_Ax2 To3d (const gp_Ax2& Pos, const gp_Ax22d& A); Standard_EXPORT static gp_Lin To3d (const gp_Ax2& Pos, const gp_Lin2d& L); Standard_EXPORT static gp_Circ To3d (const gp_Ax2& Pos, const gp_Circ2d& C); Standard_EXPORT static gp_Elips To3d (const gp_Ax2& Pos, const gp_Elips2d& E); Standard_EXPORT static gp_Hypr To3d (const gp_Ax2& Pos, const gp_Hypr2d& H); //! These functions build a 3D geometric entity from a 2D geometric entity. //! The "X Axis" and the "Y Axis" of the global coordinate //! system (i.e. 2D space) are lined up respectively with the //! "X Axis" and "Y Axis" of the 3D coordinate system, Pos. Standard_EXPORT static gp_Parab To3d (const gp_Ax2& Pos, const gp_Parab2d& Prb); protected: private: }; #include #endif // _ElCLib_HeaderFile