include/opencascade/Contap_HCurve2dTool.hxx

0001 // Created on: 1995-07-17
0002 // Created by: Laurent BUCHARD
0003 // Copyright (c) 1995-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Contap_HCurve2dTool_HeaderFile
0018 #define _Contap_HCurve2dTool_HeaderFile
0019
0020 #include <Adaptor2d_Curve2d.hxx>
0021 #include <GeomAbs_Shape.hxx>
0022 #include <Standard.hxx>
0023 #include <Standard_Boolean.hxx>
0024 #include <Standard_DefineAlloc.hxx>
0025 #include <Standard_Handle.hxx>
0026 #include <Standard_Integer.hxx>
0027 #include <Standard_Real.hxx>
0028 #include <NCollection_Array1.hxx>
0029
0030 class gp_Pnt2d;
0031 class gp_Vec2d;
0032 class Geom2d_BezierCurve;
0033 class Geom2d_BSplineCurve;
0034
0035 class Contap_HCurve2dTool
0036 {
0037 public:
0038   DEFINE_STANDARD_ALLOC
0039
0040   static double FirstParameter(const occ::handle<Adaptor2d_Curve2d>& C);
0041
0042   static double LastParameter(const occ::handle<Adaptor2d_Curve2d>& C);
0043
0044   static GeomAbs_Shape Continuity(const occ::handle<Adaptor2d_Curve2d>& C);
0045
0046   //! Returns the number of intervals for continuity
0047   //! <S>. May be one if Continuity(myclass) >= <S>
0048   static int NbIntervals(const occ::handle<Adaptor2d_Curve2d>& C, const GeomAbs_Shape S);
0049
0050   //! Stores in <T> the parameters bounding the intervals
0051   //! of continuity <S>.
0052   //!
0053   //! The array must provide enough room to accommodate
0054   //! for the parameters. i.e. T.Length() > NbIntervals()
0055   static void Intervals(const occ::handle<Adaptor2d_Curve2d>& C,
0056                         NCollection_Array1<double>&           T,
0057                         const GeomAbs_Shape                   S);
0058
0059   static bool IsClosed(const occ::handle<Adaptor2d_Curve2d>& C);
0060
0061   static bool IsPeriodic(const occ::handle<Adaptor2d_Curve2d>& C);
0062
0063   static double Period(const occ::handle<Adaptor2d_Curve2d>& C);
0064
0065   //! Computes the point of parameter U on the curve.
0066   static gp_Pnt2d Value(const occ::handle<Adaptor2d_Curve2d>& C, const double U);
0067
0068   //! Computes the point of parameter U on the curve.
0069   static void D0(const occ::handle<Adaptor2d_Curve2d>& C, const double U, gp_Pnt2d& P);
0070
0071   //! Computes the point of parameter U on the curve with its
0072   //! first derivative.
0073   //! Raised if the continuity of the current interval
0074   //! is not C1.
0075   static void D1(const occ::handle<Adaptor2d_Curve2d>& C, const double U, gp_Pnt2d& P, gp_Vec2d& V);
0076
0077   //! Returns the point P of parameter U, the first and second
0078   //! derivatives V1 and V2.
0079   //! Raised if the continuity of the current interval
0080   //! is not C2.
0081   static void D2(const occ::handle<Adaptor2d_Curve2d>& C,
0082                  const double                          U,
0083                  gp_Pnt2d&                             P,
0084                  gp_Vec2d&                             V1,
0085                  gp_Vec2d&                             V2);
0086
0087   //! Returns the point P of parameter U, the first, the second
0088   //! and the third derivative.
0089   //! Raised if the continuity of the current interval
0090   //! is not C3.
0091   static void D3(const occ::handle<Adaptor2d_Curve2d>& C,
0092                  const double                          U,
0093                  gp_Pnt2d&                             P,
0094                  gp_Vec2d&                             V1,
0095                  gp_Vec2d&                             V2,
0096                  gp_Vec2d&                             V3);
0097
0098   //! The returned vector gives the value of the derivative for the
0099   //! order of derivation N.
0100   //! Raised if the continuity of the current interval
0101   //! is not CN.
0102   //! Raised if N < 1.
0103   static gp_Vec2d DN(const occ::handle<Adaptor2d_Curve2d>& C, const double U, const int N);
0104
0105   //! Returns the parametric resolution corresponding
0106   //! to the real space resolution <R3d>.
0107   static double Resolution(const occ::handle<Adaptor2d_Curve2d>& C, const double R3d);
0108
0109   //! Returns the type of the curve in the current
0110   //! interval: Line, Circle, Ellipse, Hyperbola,
0111   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0112   static GeomAbs_CurveType GetType(const occ::handle<Adaptor2d_Curve2d>& C);
0113
0114   static gp_Lin2d Line(const occ::handle<Adaptor2d_Curve2d>& C);
0115
0116   static gp_Circ2d Circle(const occ::handle<Adaptor2d_Curve2d>& C);
0117
0118   static gp_Elips2d Ellipse(const occ::handle<Adaptor2d_Curve2d>& C);
0119
0120   static gp_Hypr2d Hyperbola(const occ::handle<Adaptor2d_Curve2d>& C);
0121
0122   static gp_Parab2d Parabola(const occ::handle<Adaptor2d_Curve2d>& C);
0123
0124   static occ::handle<Geom2d_BezierCurve> Bezier(const occ::handle<Adaptor2d_Curve2d>& C);
0125
0126   static occ::handle<Geom2d_BSplineCurve> BSpline(const occ::handle<Adaptor2d_Curve2d>& C);
0127
0128   Standard_EXPORT static int NbSamples(const occ::handle<Adaptor2d_Curve2d>& C,
0129                                        const double                          U0,
0130                                        const double                          U1);
0131 };
0132
0133 #include <Contap_HCurve2dTool.lxx>
0134
0135 #endif // _Contap_HCurve2dTool_HeaderFile