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1 | // Created on: 1991-02-26 |
2 | // Created by: Isabelle GRIGNON |
3 | // Copyright (c) 1991-1999 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 _Extrema_ELPCOfLocateExtPC2d_HeaderFile |
18 | #define _Extrema_ELPCOfLocateExtPC2d_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <Standard_Address.hxx> |
25 | #include <gp_Pnt2d.hxx> |
26 | #include <Extrema_ExtPElC2d.hxx> |
27 | #include <Extrema_SequenceOfPOnCurv2d.hxx> |
28 | #include <Standard_Boolean.hxx> |
29 | #include <Standard_Real.hxx> |
30 | #include <Extrema_EPCOfELPCOfLocateExtPC2d.hxx> |
31 | #include <Standard_Integer.hxx> |
32 | #include <GeomAbs_CurveType.hxx> |
33 | #include <TColStd_SequenceOfBoolean.hxx> |
34 | #include <TColStd_SequenceOfReal.hxx> |
35 | class StdFail_NotDone; |
36 | class Standard_OutOfRange; |
37 | class Standard_TypeMismatch; |
38 | class Adaptor2d_Curve2d; |
39 | class Extrema_Curve2dTool; |
40 | class Extrema_ExtPElC2d; |
41 | class gp_Pnt2d; |
42 | class gp_Vec2d; |
43 | class Extrema_POnCurv2d; |
44 | class Extrema_EPCOfELPCOfLocateExtPC2d; |
45 | class Extrema_PCFOfEPCOfELPCOfLocateExtPC2d; |
46 | |
47 | |
48 | |
49 | class Extrema_ELPCOfLocateExtPC2d |
50 | { |
51 | public: |
52 | |
53 | DEFINE_STANDARD_ALLOC |
54 | |
55 | |
56 | Standard_EXPORT Extrema_ELPCOfLocateExtPC2d(); |
57 | |
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58 | //! It calculates all the distances. |
59 | //! The function F(u)=distance(P,C(u)) has an extremum |
60 | //! when g(u)=dF/du=0. The algorithm searchs all the |
61 | //! zeros inside the definition range of the curve. |
62 | //! Zeros are searched between uinf and usup. |
63 | //! Tol is used to decide to stop the |
64 | //! iterations according to the following condition: |
65 | //! if n is the number of iterations, |
66 | //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol. |
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67 | Standard_EXPORT Extrema_ELPCOfLocateExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10); |
68 | |
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69 | //! It calculates all the distances. |
70 | //! The function F(u)=distance(P,C(u)) has an extremum |
71 | //! when g(u)=dF/du=0. The algorithm searchs all the |
72 | //! zeros inside the definition range of the curve. |
73 | //! Tol is used to decide to stop the |
74 | //! iterations according to the following condition: |
75 | //! if n is the number of iterations, |
76 | //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol. |
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77 | Standard_EXPORT Extrema_ELPCOfLocateExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real TolF = 1.0e-10); |
78 | |
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79 | //! initializes the fields of the algorithm. |
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80 | Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10); |
81 | |
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82 | //! An exception is raised if the fields have not been |
83 | //! initialized. |
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84 | Standard_EXPORT void Perform (const gp_Pnt2d& P); |
85 | |
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86 | //! True if the distances are found. |
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87 | Standard_EXPORT Standard_Boolean IsDone() const; |
88 | |
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89 | //! Returns the value of the <N>th extremum square distance. |
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90 | Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N) const; |
91 | |
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92 | //! Returns the number of extremum distances. |
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93 | Standard_EXPORT Standard_Integer NbExt() const; |
94 | |
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95 | //! Returns True if the <N>th extremum distance is a |
96 | //! minimum. |
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97 | Standard_EXPORT Standard_Boolean IsMin (const Standard_Integer N) const; |
98 | |
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99 | //! Returns the point of the <N>th extremum distance. |
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100 | Standard_EXPORT const Extrema_POnCurv2d& Point (const Standard_Integer N) const; |
101 | |
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102 | //! if the curve is a trimmed curve, |
103 | //! dist1 is a square distance between <P> and the point |
104 | //! of parameter FirstParameter <P1> and |
105 | //! dist2 is a square distance between <P> and the point |
106 | //! of parameter LastParameter <P2>. |
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107 | Standard_EXPORT void TrimmedSquareDistances (Standard_Real& dist1, Standard_Real& dist2, gp_Pnt2d& P1, gp_Pnt2d& P2) const; |
108 | |
109 | |
110 | |
111 | |
112 | protected: |
113 | |
114 | |
115 | Standard_EXPORT void IntervalPerform (const gp_Pnt2d& P); |
116 | |
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117 | Standard_EXPORT void AddSol(const Standard_Real theU, |
118 | const gp_Pnt2d& theP, |
119 | const Standard_Real theSqDist, |
120 | const Standard_Boolean isMin); |
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121 | |
122 | |
123 | |
124 | private: |
125 | |
126 | |
127 | |
128 | Standard_Address myC; |
129 | gp_Pnt2d Pf; |
130 | gp_Pnt2d Pl; |
131 | Extrema_ExtPElC2d myExtPElC; |
132 | Extrema_SequenceOfPOnCurv2d mypoint; |
133 | Standard_Boolean mydone; |
134 | Standard_Real mydist1; |
135 | Standard_Real mydist2; |
136 | Extrema_EPCOfELPCOfLocateExtPC2d myExtPC; |
137 | Standard_Real mytolu; |
138 | Standard_Real mytolf; |
139 | Standard_Integer mysample; |
140 | Standard_Real myintuinf; |
141 | Standard_Real myintusup; |
142 | Standard_Real myuinf; |
143 | Standard_Real myusup; |
144 | GeomAbs_CurveType type; |
145 | TColStd_SequenceOfBoolean myismin; |
146 | TColStd_SequenceOfReal mySqDist; |
147 | |
148 | |
149 | }; |
150 | |
151 | |
152 | |
153 | |
154 | |
155 | |
156 | |
157 | #endif // _Extrema_ELPCOfLocateExtPC2d_HeaderFile |