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1 | // Created on: 1992-06-04 |
2 | // Created by: Jacques GOUSSARD |
3 | // Copyright (c) 1992-1999 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 _Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter_HeaderFile |
18 | #define _Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <Standard_Boolean.hxx> |
25 | #include <Standard_Real.hxx> |
26 | #include <Geom2dInt_PCLocFOfTheLocateExtPCOfTheProjPCurOfGInter.hxx> |
27 | class Standard_DomainError; |
28 | class Standard_TypeMismatch; |
29 | class StdFail_NotDone; |
30 | class Adaptor2d_Curve2d; |
31 | class Geom2dInt_Geom2dCurveTool; |
32 | class Extrema_POnCurv2d; |
33 | class gp_Pnt2d; |
34 | class gp_Vec2d; |
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35 | |
36 | class Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter |
37 | { |
38 | public: |
39 | |
40 | DEFINE_STANDARD_ALLOC |
41 | |
42 | |
43 | Standard_EXPORT Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter(); |
44 | |
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45 | //! Calculates the distance with a close point. |
46 | //! The close point is defined by the parameter value |
47 | //! U0. |
48 | //! The function F(u)=distance(P,C(u)) has an extremum |
49 | //! when g(u)=dF/du=0. The algorithm searchs a zero |
50 | //! near the close point. |
51 | //! TolU is used to decide to stop the iterations. |
52 | //! At the nth iteration, the criteria is: |
53 | //! abs(Un - Un-1) < TolU. |
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54 | Standard_EXPORT Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real U0, const Standard_Real TolU); |
55 | |
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56 | //! Calculates the distance with a close point. |
57 | //! The close point is defined by the parameter value |
58 | //! U0. |
59 | //! The function F(u)=distance(P,C(u)) has an extremum |
60 | //! when g(u)=dF/du=0. The algorithm searchs a zero |
61 | //! near the close point. |
62 | //! Zeros are searched between Umin et Usup. |
63 | //! TolU is used to decide to stop the iterations. |
64 | //! At the nth iteration, the criteria is: |
65 | //! abs(Un - Un-1) < TolU. |
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66 | Standard_EXPORT Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real U0, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU); |
67 | |
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68 | //! sets the fields of the algorithm. |
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69 | Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU); |
70 | |
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71 | //! the algorithm is done with the point P. |
72 | //! An exception is raised if the fields have not |
73 | //! been initialized. |
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74 | Standard_EXPORT void Perform (const gp_Pnt2d& P, const Standard_Real U0); |
75 | |
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76 | //! Returns True if the distance is found. |
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77 | Standard_EXPORT Standard_Boolean IsDone() const; |
78 | |
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79 | //! Returns the value of the extremum square distance. |
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80 | Standard_EXPORT Standard_Real SquareDistance() const; |
81 | |
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82 | //! Returns True if the extremum distance is a minimum. |
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83 | Standard_EXPORT Standard_Boolean IsMin() const; |
84 | |
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85 | //! Returns the point of the extremum distance. |
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86 | Standard_EXPORT const Extrema_POnCurv2d& Point() const; |
87 | |
88 | |
89 | |
90 | |
91 | protected: |
92 | |
93 | |
94 | |
95 | |
96 | |
97 | private: |
98 | |
99 | |
100 | |
101 | Standard_Boolean myDone; |
102 | Standard_Real mytolU; |
103 | Standard_Real myumin; |
104 | Standard_Real myusup; |
105 | Geom2dInt_PCLocFOfTheLocateExtPCOfTheProjPCurOfGInter myF; |
106 | |
107 | |
108 | }; |
109 | |
110 | |
111 | |
112 | |
113 | |
114 | |
115 | |
116 | #endif // _Geom2dInt_TheLocateExtPCOfTheProjPCurOfGInter_HeaderFile |