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 <TColStd_Array1OfReal.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
0039   DEFINE_STANDARD_ALLOC
0040
0041
0042     static Standard_Real FirstParameter (const Handle(Adaptor2d_Curve2d)& C);
0043
0044     static Standard_Real LastParameter (const Handle(Adaptor2d_Curve2d)& C);
0045
0046     static GeomAbs_Shape Continuity (const Handle(Adaptor2d_Curve2d)& C);
0047
0048   //! Returns  the number  of  intervals for  continuity
0049   //! <S>. May be one if Continuity(myclass) >= <S>
0050     static Standard_Integer NbIntervals (const Handle(Adaptor2d_Curve2d)& C, const GeomAbs_Shape S);
0051
0052   //! Stores in <T> the  parameters bounding the intervals
0053   //! of continuity <S>.
0054   //!
0055   //! The array must provide  enough room to  accommodate
0056   //! for the parameters. i.e. T.Length() > NbIntervals()
0057     static void Intervals (const Handle(Adaptor2d_Curve2d)& C, TColStd_Array1OfReal& T, const GeomAbs_Shape S);
0058
0059     static Standard_Boolean IsClosed (const Handle(Adaptor2d_Curve2d)& C);
0060
0061     static Standard_Boolean IsPeriodic (const Handle(Adaptor2d_Curve2d)& C);
0062
0063     static Standard_Real Period (const Handle(Adaptor2d_Curve2d)& C);
0064
0065   //! Computes the point of parameter U on the curve.
0066     static gp_Pnt2d Value (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U);
0067
0068   //! Computes the point of parameter U on the curve.
0069     static void D0 (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real 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 Handle(Adaptor2d_Curve2d)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V);
0076
0077
0078   //! Returns the point P of parameter U, the first and second
0079   //! derivatives V1 and V2.
0080   //! Raised if the continuity of the current interval
0081   //! is not C2.
0082     static void D2 (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2);
0083
0084
0085   //! Returns the point P of parameter U, the first, the second
0086   //! and the third derivative.
0087   //! Raised if the continuity of the current interval
0088   //! is not C3.
0089     static void D3 (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3);
0090
0091
0092   //! The returned vector gives the value of the derivative for the
0093   //! order of derivation N.
0094   //! Raised if the continuity of the current interval
0095   //! is not CN.
0096   //! Raised if N < 1.
0097     static gp_Vec2d DN (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U, const Standard_Integer N);
0098
0099   //! Returns the parametric  resolution corresponding
0100   //! to the real space resolution <R3d>.
0101     static Standard_Real Resolution (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real R3d);
0102
0103   //! Returns  the  type of the   curve  in the  current
0104   //! interval :   Line,   Circle,   Ellipse, Hyperbola,
0105   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0106     static GeomAbs_CurveType GetType (const Handle(Adaptor2d_Curve2d)& C);
0107
0108     static gp_Lin2d Line (const Handle(Adaptor2d_Curve2d)& C);
0109
0110     static gp_Circ2d Circle (const Handle(Adaptor2d_Curve2d)& C);
0111
0112     static gp_Elips2d Ellipse (const Handle(Adaptor2d_Curve2d)& C);
0113
0114     static gp_Hypr2d Hyperbola (const Handle(Adaptor2d_Curve2d)& C);
0115
0116     static gp_Parab2d Parabola (const Handle(Adaptor2d_Curve2d)& C);
0117
0118     static Handle(Geom2d_BezierCurve) Bezier (const Handle(Adaptor2d_Curve2d)& C);
0119
0120     static Handle(Geom2d_BSplineCurve) BSpline (const Handle(Adaptor2d_Curve2d)& C);
0121
0122   Standard_EXPORT static Standard_Integer NbSamples (const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U0, const Standard_Real U1);
0123
0124
0125
0126
0127 protected:
0128
0129
0130
0131
0132
0133 private:
0134
0135
0136
0137
0138
0139 };
0140
0141
0142 #include <Contap_HCurve2dTool.lxx>
0143
0144
0145
0146
0147
0148 #endif // _Contap_HCurve2dTool_HeaderFile