0027491: GeomAdaptor_Curve Is Not Thread-Safe (Anymore?)
[occt.git] / src / Adaptor2d / Adaptor2d_Curve2d.hxx
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42cf5bc1 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
5//
6// This file is part of Open CASCADE Technology software library.
7//
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.
13//
14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
16
17#ifndef _Adaptor2d_Curve2d_HeaderFile
18#define _Adaptor2d_Curve2d_HeaderFile
19
20#include <Standard.hxx>
21#include <Standard_DefineAlloc.hxx>
22#include <Standard_Handle.hxx>
23
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>
30class Standard_OutOfRange;
31class Standard_NoSuchObject;
32class Standard_DomainError;
33class Adaptor2d_HCurve2d;
34class gp_Pnt2d;
35class gp_Vec2d;
36class gp_Lin2d;
37class gp_Circ2d;
38class gp_Elips2d;
39class gp_Hypr2d;
40class gp_Parab2d;
41class Geom2d_BezierCurve;
42class Geom2d_BSplineCurve;
43
44
45//! Root class for 2D curves on which geometric
46//! algorithms work.
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.
34e4e9f2
BB
52//!
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.
42cf5bc1 56class Adaptor2d_Curve2d
57{
58public:
59
60 DEFINE_STANDARD_ALLOC
61
62
63 Standard_EXPORT virtual Standard_Real FirstParameter() const;
64
65 Standard_EXPORT virtual Standard_Real LastParameter() const;
66
67 Standard_EXPORT virtual GeomAbs_Shape Continuity() const;
68
69 //! If necessary, breaks the curve in intervals of
70 //! continuity <S>. And returns the number of
71 //! intervals.
72 Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const;
73
74 //! Stores in <T> the parameters bounding the intervals
75 //! of continuity <S>.
76 //!
77 //! The array must provide enough room to accomodate
78 //! for the parameters. i.e. T.Length() > NbIntervals()
79 Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const;
80
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;
86
87 Standard_EXPORT virtual Standard_Boolean IsClosed() const;
88
89 Standard_EXPORT virtual Standard_Boolean IsPeriodic() const;
90
91 Standard_EXPORT virtual Standard_Real Period() const;
92
93 //! Computes the point of parameter U on the curve.
94 Standard_EXPORT virtual gp_Pnt2d Value (const Standard_Real U) const;
95
96 //! Computes the point of parameter U on the curve.
97 Standard_EXPORT virtual void D0 (const Standard_Real U, gp_Pnt2d& P) const;
98
99 //! Computes the point of parameter U on the curve with its
100 //! first derivative.
101 //! Raised if the continuity of the current interval
102 //! is not C1.
103 Standard_EXPORT virtual void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const;
104
105
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
109 //! is not C2.
110 Standard_EXPORT virtual void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const;
111
112
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
116 //! is not C3.
117 Standard_EXPORT virtual void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const;
118
119
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
123 //! is not CN.
124 //! Raised if N < 1.
125 Standard_EXPORT virtual gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const;
126
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;
130
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;
135
136 Standard_EXPORT virtual gp_Lin2d Line() const;
137
138 Standard_EXPORT virtual gp_Circ2d Circle() const;
139
140 Standard_EXPORT virtual gp_Elips2d Ellipse() const;
141
142 Standard_EXPORT virtual gp_Hypr2d Hyperbola() const;
143
144 Standard_EXPORT virtual gp_Parab2d Parabola() const;
145
146 Standard_EXPORT virtual Standard_Integer Degree() const;
147
148 Standard_EXPORT virtual Standard_Boolean IsRational() const;
149
150 Standard_EXPORT virtual Standard_Integer NbPoles() const;
151
152 Standard_EXPORT virtual Standard_Integer NbKnots() const;
153
154 Standard_EXPORT virtual Standard_Integer NbSamples() const;
155
156 Standard_EXPORT virtual Handle(Geom2d_BezierCurve) Bezier() const;
157
158 Standard_EXPORT virtual Handle(Geom2d_BSplineCurve) BSpline() const;
159 Standard_EXPORT virtual ~Adaptor2d_Curve2d();
160
161
162
163
164protected:
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169
170private:
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174
175
176};
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183
184#endif // _Adaptor2d_Curve2d_HeaderFile