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 <NCollection_Array1.hxx>
0031
0032 class BRepBlend_HCurve2dTool
0033 {
0034 public:
0035   DEFINE_STANDARD_ALLOC
0036
0037   static double FirstParameter(const occ::handle<Adaptor2d_Curve2d>& C);
0038
0039   static double LastParameter(const occ::handle<Adaptor2d_Curve2d>& C);
0040
0041   static GeomAbs_Shape Continuity(const occ::handle<Adaptor2d_Curve2d>& C);
0042
0043   //! Returns the number of intervals for continuity
0044   //! <S>. May be one if Continuity(myclass) >= <S>
0045   static int NbIntervals(const occ::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 occ::handle<Adaptor2d_Curve2d>& C,
0053                         NCollection_Array1<double>&           T,
0054                         const GeomAbs_Shape                   S);
0055
0056   static bool IsClosed(const occ::handle<Adaptor2d_Curve2d>& C);
0057
0058   static bool IsPeriodic(const occ::handle<Adaptor2d_Curve2d>& C);
0059
0060   static double Period(const occ::handle<Adaptor2d_Curve2d>& C);
0061
0062   //! Computes the point of parameter U on the curve.
0063   static gp_Pnt2d Value(const occ::handle<Adaptor2d_Curve2d>& C, const double U);
0064
0065   //! Computes the point of parameter U on the curve.
0066   static void D0(const occ::handle<Adaptor2d_Curve2d>& C, const double 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 occ::handle<Adaptor2d_Curve2d>& C, const double U, gp_Pnt2d& P, gp_Vec2d& V);
0073
0074   //! Returns the point P of parameter U, the first and second
0075   //! derivatives V1 and V2.
0076   //! Raised if the continuity of the current interval
0077   //! is not C2.
0078   static void D2(const occ::handle<Adaptor2d_Curve2d>& C,
0079                  const double                          U,
0080                  gp_Pnt2d&                             P,
0081                  gp_Vec2d&                             V1,
0082                  gp_Vec2d&                             V2);
0083
0084   //! Returns the point P of parameter U, the first, the second
0085   //! and the third derivative.
0086   //! Raised if the continuity of the current interval
0087   //! is not C3.
0088   static void D3(const occ::handle<Adaptor2d_Curve2d>& C,
0089                  const double                          U,
0090                  gp_Pnt2d&                             P,
0091                  gp_Vec2d&                             V1,
0092                  gp_Vec2d&                             V2,
0093                  gp_Vec2d&                             V3);
0094
0095   //! The returned vector gives the value of the derivative for the
0096   //! order of derivation N.
0097   //! Raised if the continuity of the current interval
0098   //! is not CN.
0099   //! Raised if N < 1.
0100   static gp_Vec2d DN(const occ::handle<Adaptor2d_Curve2d>& C, const double U, const int N);
0101
0102   //! Returns the parametric resolution corresponding
0103   //! to the real space resolution <R3d>.
0104   static double Resolution(const occ::handle<Adaptor2d_Curve2d>& C, const double R3d);
0105
0106   //! Returns the type of the curve in the current
0107   //! interval: Line, Circle, Ellipse, Hyperbola,
0108   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0109   static GeomAbs_CurveType GetType(const occ::handle<Adaptor2d_Curve2d>& C);
0110
0111   static gp_Lin2d Line(const occ::handle<Adaptor2d_Curve2d>& C);
0112
0113   static gp_Circ2d Circle(const occ::handle<Adaptor2d_Curve2d>& C);
0114
0115   static gp_Elips2d Ellipse(const occ::handle<Adaptor2d_Curve2d>& C);
0116
0117   static gp_Hypr2d Hyperbola(const occ::handle<Adaptor2d_Curve2d>& C);
0118
0119   static gp_Parab2d Parabola(const occ::handle<Adaptor2d_Curve2d>& C);
0120
0121   static occ::handle<Geom2d_BezierCurve> Bezier(const occ::handle<Adaptor2d_Curve2d>& C);
0122
0123   static occ::handle<Geom2d_BSplineCurve> BSpline(const occ::handle<Adaptor2d_Curve2d>& C);
0124
0125   Standard_EXPORT static int NbSamples(const occ::handle<Adaptor2d_Curve2d>& C,
0126                                        const double                          U0,
0127                                        const double                          U1);
0128 };
0129
0130 #include <BRepBlend_HCurve2dTool.lxx>
0131
0132 #endif // _BRepBlend_HCurve2dTool_HeaderFile