0027491: GeomAdaptor_Curve Is Not Thread-Safe (Anymore?)
[occt.git] / src / Geom2dAdaptor / Geom2dAdaptor_Curve.hxx
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42cf5bc1 1// Created on: 1993-06-03
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 _Geom2dAdaptor_Curve_HeaderFile
18#define _Geom2dAdaptor_Curve_HeaderFile
19
20#include <Standard.hxx>
21#include <Standard_DefineAlloc.hxx>
22#include <Standard_Handle.hxx>
23
24#include <GeomAbs_CurveType.hxx>
25#include <Standard_Real.hxx>
26#include <BSplCLib_Cache.hxx>
27#include <Adaptor2d_Curve2d.hxx>
28#include <GeomAbs_Shape.hxx>
29#include <Standard_Integer.hxx>
30#include <TColStd_Array1OfReal.hxx>
31#include <Standard_Boolean.hxx>
d660a72a 32#include <Geom2dEvaluator_Curve.hxx>
33
42cf5bc1 34class Geom2d_Curve;
35class Adaptor2d_HCurve2d;
36class Standard_NoSuchObject;
37class Standard_ConstructionError;
38class Standard_OutOfRange;
39class Standard_DomainError;
40class gp_Pnt2d;
41class gp_Vec2d;
42class gp_Lin2d;
43class gp_Circ2d;
44class gp_Elips2d;
45class gp_Hypr2d;
46class gp_Parab2d;
47class Geom2d_BezierCurve;
48class Geom2d_BSplineCurve;
49
50
51//! An interface between the services provided by any
52//! curve from the package Geom2d and those required
53//! of the curve by algorithms which use it.
34e4e9f2
BB
54//!
55//! Polynomial coefficients of BSpline curves used for their evaluation are
56//! cached for better performance. Therefore these evaluations are not
57//! thread-safe and parallel evaluations need to be prevented.
42cf5bc1 58class Geom2dAdaptor_Curve : public Adaptor2d_Curve2d
59{
60public:
61
62 DEFINE_STANDARD_ALLOC
63
64
65 Standard_EXPORT Geom2dAdaptor_Curve();
66
67 Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C);
68
69 //! ConstructionError is raised if Ufirst>Ulast
70 Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
71
72 void Load (const Handle(Geom2d_Curve)& C);
73
74 //! ConstructionError is raised if Ufirst>Ulast
75 void Load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
76
77 const Handle(Geom2d_Curve)& Curve() const;
78
79 Standard_Real FirstParameter() const Standard_OVERRIDE;
80
81 Standard_Real LastParameter() const Standard_OVERRIDE;
82
83 Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
84
85 //! If necessary, breaks the curve in intervals of
86 //! continuity <S>. And returns the number of
87 //! intervals.
88 Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
89
90 //! Stores in <T> the parameters bounding the intervals
91 //! of continuity <S>.
92 //!
93 //! The array must provide enough room to accomodate
94 //! for the parameters. i.e. T.Length() > NbIntervals()
95 Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
96
97 //! Returns a curve equivalent of <me> between
98 //! parameters <First> and <Last>. <Tol> is used to
99 //! test for 3d points confusion.
100 //! If <First> >= <Last>
101 Standard_EXPORT Handle(Adaptor2d_HCurve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE;
102
103 Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
104
105 Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
106
107 Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
108
109 //! Computes the point of parameter U on the curve
110 Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const Standard_OVERRIDE;
111
112 //! Computes the point of parameter U.
113 Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const Standard_OVERRIDE;
114
115 //! Computes the point of parameter U on the curve with its
116 //! first derivative.
117 //! Raised if the continuity of the current interval
118 //! is not C1.
119 Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const Standard_OVERRIDE;
120
121
122 //! Returns the point P of parameter U, the first and second
123 //! derivatives V1 and V2.
124 //! Raised if the continuity of the current interval
125 //! is not C2.
126 Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE;
127
128
129 //! Returns the point P of parameter U, the first, the second
130 //! and the third derivative.
131 //! Raised if the continuity of the current interval
132 //! is not C3.
133 Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const Standard_OVERRIDE;
134
135
136 //! The returned vector gives the value of the derivative for the
137 //! order of derivation N.
138 //! Raised if the continuity of the current interval
139 //! is not CN.
140 //! Raised if N < 1.
141 Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
142
143 //! returns the parametric resolution
144 Standard_EXPORT Standard_Real Resolution (const Standard_Real Ruv) const Standard_OVERRIDE;
145
146 GeomAbs_CurveType GetType() const Standard_OVERRIDE;
147
148 Standard_EXPORT gp_Lin2d Line() const Standard_OVERRIDE;
149
150 Standard_EXPORT gp_Circ2d Circle() const Standard_OVERRIDE;
151
152 Standard_EXPORT gp_Elips2d Ellipse() const Standard_OVERRIDE;
153
154 Standard_EXPORT gp_Hypr2d Hyperbola() const Standard_OVERRIDE;
155
156 Standard_EXPORT gp_Parab2d Parabola() const Standard_OVERRIDE;
157
158 Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
159
160 Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
161
162 Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
163
164 Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
165
166 Standard_EXPORT virtual Standard_Integer NbSamples() const Standard_OVERRIDE;
167
168 Standard_EXPORT Handle(Geom2d_BezierCurve) Bezier() const Standard_OVERRIDE;
169
170 Standard_EXPORT Handle(Geom2d_BSplineCurve) BSpline() const Standard_OVERRIDE;
171
172
173
174
175protected:
176
177
178
179
180
181private:
182
42cf5bc1 183 Standard_EXPORT GeomAbs_Shape LocalContinuity (const Standard_Real U1, const Standard_Real U2) const;
184
185 Standard_EXPORT void load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
d660a72a 186
187 //! Check theU relates to start or finish point of B-spline curve and return indices of span the point is located
188 Standard_Boolean IsBoundary(const Standard_Real theU, Standard_Integer& theSpanStart, Standard_Integer& theSpanFinish) const;
189
42cf5bc1 190 //! Rebuilds B-spline cache
191 //! \param theParameter the value on the knot axis which identifies the caching span
d660a72a 192 void RebuildCache (const Standard_Real theParameter) const;
42cf5bc1 193
194
195 Handle(Geom2d_Curve) myCurve;
196 GeomAbs_CurveType myTypeCurve;
197 Standard_Real myFirst;
198 Standard_Real myLast;
3b25c0e8
IC
199
200 Handle(Geom2d_BSplineCurve) myBSplineCurve; ///< B-spline representation to prevent castings
d660a72a 201 Handle(BSplCLib_Cache) myCurveCache; ///< Cached data for B-spline or Bezier curve
202 Handle(Geom2dEvaluator_Curve) myNestedEvaluator; ///< Calculates value of offset curve
42cf5bc1 203
204
205};
206
207
208#include <Geom2dAdaptor_Curve.lxx>
209
210
211
212
213
214#endif // _Geom2dAdaptor_Curve_HeaderFile