0027491: GeomAdaptor_Curve Is Not Thread-Safe (Anymore?)
[occt.git] / src / Adaptor3d / Adaptor3d_Curve.hxx
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42cf5bc1 1// Created on: 1993-03-31
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 _Adaptor3d_Curve_HeaderFile
18#define _Adaptor3d_Curve_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 Adaptor3d_HCurve;
34class gp_Pnt;
35class gp_Vec;
36class gp_Lin;
37class gp_Circ;
38class gp_Elips;
39class gp_Hypr;
40class gp_Parab;
41class Geom_BezierCurve;
42class Geom_BSplineCurve;
43
44
45//! Root class for 3D 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//! Two derived concrete classes are provided:
51//! - GeomAdaptor_Curve for a curve from the Geom package
52//! - Adaptor3d_CurveOnSurface for a curve lying on
53//! a surface from the Geom package.
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 Adaptor3d_Curve
59{
60public:
61
62 DEFINE_STANDARD_ALLOC
63
64
65 Standard_EXPORT virtual Standard_Real FirstParameter() const;
66
67 Standard_EXPORT virtual Standard_Real LastParameter() const;
68
69 Standard_EXPORT virtual GeomAbs_Shape Continuity() const;
70
71 //! Returns the number of intervals for continuity
72 //! <S>. May be one if Continuity(me) >= <S>
73 Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const;
74
75 //! Stores in <T> the parameters bounding the intervals
76 //! of continuity <S>.
77 //!
78 //! The array must provide enough room to accomodate
79 //! for the parameters. i.e. T.Length() > NbIntervals()
80 Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const;
81
82 //! Returns a curve equivalent of <me> between
83 //! parameters <First> and <Last>. <Tol> is used to
84 //! test for 3d points confusion.
85 //! If <First> >= <Last>
86 Standard_EXPORT virtual Handle(Adaptor3d_HCurve) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const;
87
88 Standard_EXPORT virtual Standard_Boolean IsClosed() const;
89
90 Standard_EXPORT virtual Standard_Boolean IsPeriodic() const;
91
92 Standard_EXPORT virtual Standard_Real Period() const;
93
94 //! Computes the point of parameter U on the curve.
95 Standard_EXPORT virtual gp_Pnt Value (const Standard_Real U) const;
96
97 //! Computes the point of parameter U on the curve.
98 Standard_EXPORT virtual void D0 (const Standard_Real U, gp_Pnt& P) const;
99
100 //! Computes the point of parameter U on the curve with its
101 //! first derivative.
102 //! Raised if the continuity of the current interval
103 //! is not C1.
104 Standard_EXPORT virtual void D1 (const Standard_Real U, gp_Pnt& P, gp_Vec& V) const;
105
106
107 //! Returns the point P of parameter U, the first and second
108 //! derivatives V1 and V2.
109 //! Raised if the continuity of the current interval
110 //! is not C2.
111 Standard_EXPORT virtual void D2 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const;
112
113
114 //! Returns the point P of parameter U, the first, the second
115 //! and the third derivative.
116 //! Raised if the continuity of the current interval
117 //! is not C3.
118 Standard_EXPORT virtual void D3 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3) const;
119
120
121 //! The returned vector gives the value of the derivative for the
122 //! order of derivation N.
123 //! Raised if the continuity of the current interval
124 //! is not CN.
125 //! Raised if N < 1.
126 Standard_EXPORT virtual gp_Vec DN (const Standard_Real U, const Standard_Integer N) const;
127
128 //! Returns the parametric resolution corresponding
129 //! to the real space resolution <R3d>.
130 Standard_EXPORT virtual Standard_Real Resolution (const Standard_Real R3d) const;
131
132 //! Returns the type of the curve in the current
133 //! interval : Line, Circle, Ellipse, Hyperbola,
134 //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
135 Standard_EXPORT virtual GeomAbs_CurveType GetType() const;
136
137 Standard_EXPORT virtual gp_Lin Line() const;
138
139 Standard_EXPORT virtual gp_Circ Circle() const;
140
141 Standard_EXPORT virtual gp_Elips Ellipse() const;
142
143 Standard_EXPORT virtual gp_Hypr Hyperbola() const;
144
145 Standard_EXPORT virtual gp_Parab Parabola() const;
146
147 Standard_EXPORT virtual Standard_Integer Degree() const;
148
149 Standard_EXPORT virtual Standard_Boolean IsRational() const;
150
151 Standard_EXPORT virtual Standard_Integer NbPoles() const;
152
153 Standard_EXPORT virtual Standard_Integer NbKnots() const;
154
155 Standard_EXPORT virtual Handle(Geom_BezierCurve) Bezier() const;
156
157 Standard_EXPORT virtual Handle(Geom_BSplineCurve) BSpline() const;
158 Standard_EXPORT virtual ~Adaptor3d_Curve();
159
160
161
162
163protected:
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168
169private:
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174
175};
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182
183#endif // _Adaptor3d_Curve_HeaderFile