include/opencascade/Adaptor2d_OffsetCurve.hxx

0001 // Created on: 1993-04-15
0002 // Created by: Bruno DUMORTIER
0003 // Copyright (c) 1993-1999 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 _Adaptor2d_OffsetCurve_HeaderFile
0018 #define _Adaptor2d_OffsetCurve_HeaderFile
0019
0020 #include <Adaptor2d_Curve2d.hxx>
0021 #include <GeomAbs_CurveType.hxx>
0022 #include <GeomAbs_Shape.hxx>
0023 #include <Standard_Integer.hxx>
0024 #include <TColStd_Array1OfReal.hxx>
0025
0026 class gp_Pnt2d;
0027 class gp_Vec2d;
0028 class gp_Lin2d;
0029 class gp_Circ2d;
0030 class gp_Elips2d;
0031 class gp_Hypr2d;
0032 class gp_Parab2d;
0033 class Geom2d_BezierCurve;
0034 class Geom2d_BSplineCurve;
0035
0036 //! Defines an Offset curve (algorithmic 2d curve).
0037 class Adaptor2d_OffsetCurve  : public Adaptor2d_Curve2d
0038 {
0039   DEFINE_STANDARD_RTTIEXT(Adaptor2d_OffsetCurve, Adaptor2d_Curve2d)
0040 public:
0041
0042   //! The Offset is set to 0.
0043   Standard_EXPORT Adaptor2d_OffsetCurve();
0044
0045   //! The curve is loaded. The Offset is set to 0.
0046   Standard_EXPORT Adaptor2d_OffsetCurve(const Handle(Adaptor2d_Curve2d)& C);
0047
0048   //! Creates  an  OffsetCurve curve.
0049   //! The Offset is set to Offset.
0050   Standard_EXPORT Adaptor2d_OffsetCurve(const Handle(Adaptor2d_Curve2d)& C, const Standard_Real Offset);
0051
0052   //! Create an Offset curve.
0053   //! WFirst,WLast define the bounds of the Offset curve.
0054   Standard_EXPORT Adaptor2d_OffsetCurve(const Handle(Adaptor2d_Curve2d)& C, const Standard_Real Offset, const Standard_Real WFirst, const Standard_Real WLast);
0055
0056   //! Shallow copy of adaptor
0057   Standard_EXPORT virtual Handle(Adaptor2d_Curve2d) ShallowCopy() const Standard_OVERRIDE;
0058
0059   //! Changes  the curve.  The Offset is reset to 0.
0060   Standard_EXPORT void Load (const Handle(Adaptor2d_Curve2d)& S);
0061
0062   //! Changes the Offset on the current Curve.
0063   Standard_EXPORT void Load (const Standard_Real Offset);
0064
0065   //! Changes the Offset Curve on the current Curve.
0066   Standard_EXPORT void Load (const Standard_Real Offset, const Standard_Real WFirst, const Standard_Real WLast);
0067
0068   const Handle(Adaptor2d_Curve2d)& Curve() const { return myCurve; }
0069
0070   Standard_Real Offset() const { return myOffset; }
0071
0072   virtual Standard_Real FirstParameter() const Standard_OVERRIDE { return myFirst; }
0073
0074   virtual Standard_Real LastParameter() const Standard_OVERRIDE { return myLast; }
0075
0076   Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
0077
0078   //! If necessary,  breaks the  curve in  intervals  of
0079   //! continuity  <S>.    And  returns   the number   of
0080   //! intervals.
0081   Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
0082
0083   //! Stores in <T> the  parameters bounding the intervals
0084   //! of continuity <S>.
0085   //!
0086   //! The array must provide  enough room to  accommodate
0087   //! for the parameters. i.e. T.Length() > NbIntervals()
0088   Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
0089
0090   //! Returns    a  curve equivalent   of  <me>  between
0091   //! parameters <First>  and <Last>. <Tol>  is used  to
0092   //! test for 3d points confusion.
0093   //! If <First> >= <Last>
0094   Standard_EXPORT Handle(Adaptor2d_Curve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE;
0095
0096   Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
0097
0098   Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
0099
0100   Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
0101
0102   //! Computes the point of parameter U on the curve.
0103   Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const Standard_OVERRIDE;
0104
0105   //! Computes the point of parameter U on the curve.
0106   Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const Standard_OVERRIDE;
0107
0108   //! Computes the point of parameter U on the curve with its
0109   //! first derivative.
0110   //! Raised if the continuity of the current interval
0111   //! is not C1.
0112   Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const Standard_OVERRIDE;
0113
0114
0115   //! Returns the point P of parameter U, the first and second
0116   //! derivatives V1 and V2.
0117   //! Raised if the continuity of the current interval
0118   //! is not C2.
0119   Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE;
0120
0121
0122   //! Returns the point P of parameter U, the first, the second
0123   //! and the third derivative.
0124   //! Raised if the continuity of the current interval
0125   //! is not C3.
0126   Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const Standard_OVERRIDE;
0127
0128
0129   //! The returned vector gives the value of the derivative for the
0130   //! order of derivation N.
0131   //! Raised if the continuity of the current interval
0132   //! is not CN.
0133   //! Raised if N < 1.
0134   Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
0135
0136   //! Returns the parametric  resolution corresponding
0137   //! to the real space resolution <R3d>.
0138   Standard_EXPORT Standard_Real Resolution (const Standard_Real R3d) const Standard_OVERRIDE;
0139
0140   //! Returns  the  type of the   curve  in the  current
0141   //! interval :   Line,   Circle,   Ellipse, Hyperbola,
0142   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0143   Standard_EXPORT GeomAbs_CurveType GetType() const Standard_OVERRIDE;
0144
0145   Standard_EXPORT gp_Lin2d Line() const Standard_OVERRIDE;
0146
0147   Standard_EXPORT gp_Circ2d Circle() const Standard_OVERRIDE;
0148
0149   Standard_EXPORT gp_Elips2d Ellipse() const Standard_OVERRIDE;
0150
0151   Standard_EXPORT gp_Hypr2d Hyperbola() const Standard_OVERRIDE;
0152
0153   Standard_EXPORT gp_Parab2d Parabola() const Standard_OVERRIDE;
0154
0155   Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
0156
0157   Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
0158
0159   Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
0160
0161   Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
0162
0163   Standard_EXPORT Handle(Geom2d_BezierCurve) Bezier() const Standard_OVERRIDE;
0164
0165   Standard_EXPORT Handle(Geom2d_BSplineCurve) BSpline() const Standard_OVERRIDE;
0166
0167   Standard_EXPORT  Standard_Integer NbSamples() const Standard_OVERRIDE;
0168
0169 private:
0170
0171   Handle(Adaptor2d_Curve2d) myCurve;
0172   Standard_Real myOffset;
0173   Standard_Real myFirst;
0174   Standard_Real myLast;
0175
0176 };
0177
0178 DEFINE_STANDARD_HANDLE(Adaptor2d_OffsetCurve, Adaptor2d_Curve2d)
0179
0180 #endif // _Adaptor2d_OffsetCurve_HeaderFile