1 // Created on: 1993-04-02
2 // Created by: Bruno DUMORTIER
3 // Copyright (c) 1993-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _Adaptor2d_Curve2d_HeaderFile
18 #define _Adaptor2d_Curve2d_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Real.hxx>
25 #include <GeomAbs_Shape.hxx>
26 #include <Standard_Integer.hxx>
27 #include <TColStd_Array1OfReal.hxx>
28 #include <Standard_Boolean.hxx>
29 #include <GeomAbs_CurveType.hxx>
30 class Standard_OutOfRange;
31 class Standard_NoSuchObject;
32 class Standard_DomainError;
33 class Adaptor2d_HCurve2d;
41 class Geom2d_BezierCurve;
42 class Geom2d_BSplineCurve;
45 //! Root class for 2D curves on which geometric
47 //! An adapted curve is an interface between the
48 //! services provided by a curve, and those required of
49 //! the curve by algorithms, which use it.
50 //! A derived concrete class is provided:
51 //! Geom2dAdaptor_Curve for a curve from the Geom2d package.
53 //! Polynomial coefficients of BSpline curves used for their evaluation are
54 //! cached for better performance. Therefore these evaluations are not
55 //! thread-safe and parallel evaluations need to be prevented.
56 class Adaptor2d_Curve2d
63 Standard_EXPORT virtual Standard_Real FirstParameter() const;
65 Standard_EXPORT virtual Standard_Real LastParameter() const;
67 Standard_EXPORT virtual GeomAbs_Shape Continuity() const;
69 //! If necessary, breaks the curve in intervals of
70 //! continuity <S>. And returns the number of
72 Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const;
74 //! Stores in <T> the parameters bounding the intervals
75 //! of continuity <S>.
77 //! The array must provide enough room to accommodate
78 //! for the parameters. i.e. T.Length() > NbIntervals()
79 Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const;
81 //! Returns a curve equivalent of <me> between
82 //! parameters <First> and <Last>. <Tol> is used to
83 //! test for 3d points confusion.
84 //! If <First> >= <Last>
85 Standard_EXPORT virtual Handle(Adaptor2d_HCurve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const;
87 Standard_EXPORT virtual Standard_Boolean IsClosed() const;
89 Standard_EXPORT virtual Standard_Boolean IsPeriodic() const;
91 Standard_EXPORT virtual Standard_Real Period() const;
93 //! Computes the point of parameter U on the curve.
94 Standard_EXPORT virtual gp_Pnt2d Value (const Standard_Real U) const;
96 //! Computes the point of parameter U on the curve.
97 Standard_EXPORT virtual void D0 (const Standard_Real U, gp_Pnt2d& P) const;
99 //! Computes the point of parameter U on the curve with its
100 //! first derivative.
101 //! Raised if the continuity of the current interval
103 Standard_EXPORT virtual void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const;
106 //! Returns the point P of parameter U, the first and second
107 //! derivatives V1 and V2.
108 //! Raised if the continuity of the current interval
110 Standard_EXPORT virtual void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const;
113 //! Returns the point P of parameter U, the first, the second
114 //! and the third derivative.
115 //! Raised if the continuity of the current interval
117 Standard_EXPORT virtual void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const;
120 //! The returned vector gives the value of the derivative for the
121 //! order of derivation N.
122 //! Raised if the continuity of the current interval
125 Standard_EXPORT virtual gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const;
127 //! Returns the parametric resolution corresponding
128 //! to the real space resolution <R3d>.
129 Standard_EXPORT virtual Standard_Real Resolution (const Standard_Real R3d) const;
131 //! Returns the type of the curve in the current
132 //! interval : Line, Circle, Ellipse, Hyperbola,
133 //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
134 Standard_EXPORT virtual GeomAbs_CurveType GetType() const;
136 Standard_EXPORT virtual gp_Lin2d Line() const;
138 Standard_EXPORT virtual gp_Circ2d Circle() const;
140 Standard_EXPORT virtual gp_Elips2d Ellipse() const;
142 Standard_EXPORT virtual gp_Hypr2d Hyperbola() const;
144 Standard_EXPORT virtual gp_Parab2d Parabola() const;
146 Standard_EXPORT virtual Standard_Integer Degree() const;
148 Standard_EXPORT virtual Standard_Boolean IsRational() const;
150 Standard_EXPORT virtual Standard_Integer NbPoles() const;
152 Standard_EXPORT virtual Standard_Integer NbKnots() const;
154 Standard_EXPORT virtual Standard_Integer NbSamples() const;
156 Standard_EXPORT virtual Handle(Geom2d_BezierCurve) Bezier() const;
158 Standard_EXPORT virtual Handle(Geom2d_BSplineCurve) BSpline() const;
159 Standard_EXPORT virtual ~Adaptor2d_Curve2d();
184 #endif // _Adaptor2d_Curve2d_HeaderFile