include/opencascade/BRepBlend_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 _BRepBlend_HCurve2dTool_HeaderFile
0018 #define _BRepBlend_HCurve2dTool_HeaderFile
0019
0020 #include <Adaptor2d_Curve2d.hxx>
0021 #include <GeomAbs_CurveType.hxx>
0022 #include <GeomAbs_Shape.hxx>
0023 #include <gp_Lin2d.hxx>
0024 #include <gp_Circ2d.hxx>
0025 #include <gp_Elips2d.hxx>
0026 #include <gp_Parab2d.hxx>
0027 #include <gp_Pnt2d.hxx>
0028 #include <gp_Vec2d.hxx>
0029 #include <gp_Hypr2d.hxx>
0030 #include <TColStd_Array1OfReal.hxx>
0031
0032 class BRepBlend_HCurve2dTool
0033 {
0034 public:
0035   DEFINE_STANDARD_ALLOC
0036
0037   static Standard_Real FirstParameter(const Handle(Adaptor2d_Curve2d)& C);
0038
0039   static Standard_Real LastParameter(const Handle(Adaptor2d_Curve2d)& C);
0040
0041   static GeomAbs_Shape Continuity(const Handle(Adaptor2d_Curve2d)& C);
0042
0043   //! Returns  the number  of  intervals for  continuity
0044   //! <S>. May be one if Continuity(myclass) >= <S>
0045   static Standard_Integer NbIntervals(const Handle(Adaptor2d_Curve2d)& C, const GeomAbs_Shape S);
0046
0047   //! Stores in <T> the  parameters bounding the intervals
0048   //! of continuity <S>.
0049   //!
0050   //! The array must provide  enough room to  accommodate
0051   //! for the parameters. i.e. T.Length() > NbIntervals()
0052   static void Intervals(const Handle(Adaptor2d_Curve2d)& C,
0053                         TColStd_Array1OfReal&            T,
0054                         const GeomAbs_Shape              S);
0055
0056   static Standard_Boolean IsClosed(const Handle(Adaptor2d_Curve2d)& C);
0057
0058   static Standard_Boolean IsPeriodic(const Handle(Adaptor2d_Curve2d)& C);
0059
0060   static Standard_Real Period(const Handle(Adaptor2d_Curve2d)& C);
0061
0062   //! Computes the point of parameter U on the curve.
0063   static gp_Pnt2d Value(const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U);
0064
0065   //! Computes the point of parameter U on the curve.
0066   static void D0(const Handle(Adaptor2d_Curve2d)& C, const Standard_Real U, gp_Pnt2d& P);
0067
0068   //! Computes the point of parameter U on the curve with its
0069   //! first derivative.
0070   //! Raised if the continuity of the current interval
0071   //! is not C1.
0072   static void D1(const Handle(Adaptor2d_Curve2d)& C,
0073                  const Standard_Real              U,
0074                  gp_Pnt2d&                        P,
0075                  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 Handle(Adaptor2d_Curve2d)& C,
0082                  const Standard_Real              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 Handle(Adaptor2d_Curve2d)& C,
0092                  const Standard_Real              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 Handle(Adaptor2d_Curve2d)& C,
0104                      const Standard_Real              U,
0105                      const Standard_Integer           N);
0106
0107   //! Returns the parametric  resolution corresponding
0108   //! to the real space resolution <R3d>.
0109   static Standard_Real Resolution(const Handle(Adaptor2d_Curve2d)& C, const Standard_Real R3d);
0110
0111   //! Returns  the  type of the   curve  in the  current
0112   //! interval :   Line,   Circle,   Ellipse, Hyperbola,
0113   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0114   static GeomAbs_CurveType GetType(const Handle(Adaptor2d_Curve2d)& C);
0115
0116   static gp_Lin2d Line(const Handle(Adaptor2d_Curve2d)& C);
0117
0118   static gp_Circ2d Circle(const Handle(Adaptor2d_Curve2d)& C);
0119
0120   static gp_Elips2d Ellipse(const Handle(Adaptor2d_Curve2d)& C);
0121
0122   static gp_Hypr2d Hyperbola(const Handle(Adaptor2d_Curve2d)& C);
0123
0124   static gp_Parab2d Parabola(const Handle(Adaptor2d_Curve2d)& C);
0125
0126   static Handle(Geom2d_BezierCurve) Bezier(const Handle(Adaptor2d_Curve2d)& C);
0127
0128   static Handle(Geom2d_BSplineCurve) BSpline(const Handle(Adaptor2d_Curve2d)& C);
0129
0130   Standard_EXPORT static Standard_Integer NbSamples(const Handle(Adaptor2d_Curve2d)& C,
0131                                                     const Standard_Real              U0,
0132                                                     const Standard_Real              U1);
0133
0134 protected:
0135 private:
0136 };
0137
0138 #include <BRepBlend_HCurve2dTool.lxx>
0139
0140 #endif // _BRepBlend_HCurve2dTool_HeaderFile