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
6 // This file is part of Open CASCADE Technology software library.
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.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _Extrema_ExtPC_HeaderFile
18 #define _Extrema_ExtPC_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
24 #include <Extrema_ExtPElC.hxx>
25 #include <Extrema_EPCOfExtPC.hxx>
26 #include <Standard_Integer.hxx>
27 #include <GeomAbs_CurveType.hxx>
28 #include <TColStd_SequenceOfBoolean.hxx>
29 #include <TColStd_SequenceOfReal.hxx>
30 class StdFail_NotDone;
31 class Standard_OutOfRange;
32 class Standard_TypeMismatch;
33 class Adaptor3d_Curve;
34 class Extrema_CurveTool;
35 class Extrema_ExtPElC;
38 class Extrema_POnCurv;
39 class Extrema_EPCOfExtPC;
40 class Extrema_PCFOfEPCOfExtPC;
51 Standard_EXPORT Extrema_ExtPC();
53 //! It calculates all the distances.
54 //! The function F(u)=distance(P,C(u)) has an extremum
55 //! when g(u)=dF/du=0. The algorithm searches all the
56 //! zeros inside the definition range of the curve.
57 //! Zeros are searched between uinf and usup.
58 //! Tol is used to decide to stop the
59 //! iterations according to the following condition:
60 //! if n is the number of iterations,
61 //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
62 Standard_EXPORT Extrema_ExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
64 //! It calculates all the distances.
65 //! The function F(u)=distance(P,C(u)) has an extremum
66 //! when g(u)=dF/du=0. The algorithm searches all the
67 //! zeros inside the definition range of the curve.
68 //! Tol is used to decide to stop the
69 //! iterations according to the following condition:
70 //! if n is the number of iterations,
71 //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
72 Standard_EXPORT Extrema_ExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Real TolF = 1.0e-10);
74 //! initializes the fields of the algorithm.
75 Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
77 //! An exception is raised if the fields have not been
79 Standard_EXPORT void Perform (const gp_Pnt& P);
81 //! True if the distances are found.
82 Standard_EXPORT Standard_Boolean IsDone() const;
84 //! Returns the value of the <N>th extremum square distance.
85 Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N) const;
87 //! Returns the number of extremum distances.
88 Standard_EXPORT Standard_Integer NbExt() const;
90 //! Returns True if the <N>th extremum distance is a
92 Standard_EXPORT Standard_Boolean IsMin (const Standard_Integer N) const;
94 //! Returns the point of the <N>th extremum distance.
95 Standard_EXPORT const Extrema_POnCurv& Point (const Standard_Integer N) const;
97 //! if the curve is a trimmed curve,
98 //! dist1 is a square distance between <P> and the point
99 //! of parameter FirstParameter <P1> and
100 //! dist2 is a square distance between <P> and the point
101 //! of parameter LastParameter <P2>.
102 Standard_EXPORT void TrimmedSquareDistances (Standard_Real& dist1, Standard_Real& dist2, gp_Pnt& P1, gp_Pnt& P2) const;
110 Standard_EXPORT void IntervalPerform (const gp_Pnt& P);
112 Standard_EXPORT void AddSol(const Standard_Real theU,
114 const Standard_Real theSqDist,
115 const Standard_Boolean isMin);
123 Standard_Address myC;
126 Extrema_ExtPElC myExtPElC;
127 Extrema_SequenceOfPOnCurv mypoint;
128 Standard_Boolean mydone;
129 Standard_Real mydist1;
130 Standard_Real mydist2;
131 Extrema_EPCOfExtPC myExtPC;
132 Standard_Real mytolu;
133 Standard_Real mytolf;
134 Standard_Integer mysample;
135 Standard_Real myintuinf;
136 Standard_Real myintusup;
137 Standard_Real myuinf;
138 Standard_Real myusup;
139 GeomAbs_CurveType type;
140 TColStd_SequenceOfBoolean myismin;
141 TColStd_SequenceOfReal mySqDist;
152 #endif // _Extrema_ExtPC_HeaderFile