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1 | // Created on: 1995-07-18 |
2 | // Created by: Modelistation |
3 | // Copyright (c) 1995-1999 Matra Datavision |
4 | // Copyright (c) 1999-2012 OPEN CASCADE SAS |
5 | // |
6 | // The content of this file is subject to the Open CASCADE Technology Public |
7 | // License Version 6.5 (the "License"). You may not use the content of this file |
8 | // except in compliance with the License. Please obtain a copy of the License |
9 | // at http://www.opencascade.org and read it completely before using this file. |
10 | // |
11 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
12 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
13 | // |
14 | // The Original Code and all software distributed under the License is |
15 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
16 | // Initial Developer hereby disclaims all such warranties, including without |
17 | // limitation, any warranties of merchantability, fitness for a particular |
18 | // purpose or non-infringement. Please see the License for the specific terms |
19 | // and conditions governing the rights and limitations under the License. |
20 | |
7fd59977 |
21 | |
22 | |
23 | #include <StdFail_NotDone.hxx> |
24 | #include <Standard_DomainError.hxx> |
25 | #include <math_FunctionRoot.hxx> |
26 | |
27 | //======================================================================= |
28 | //function : Extrema_GenLocateExtPC |
29 | //purpose : |
30 | //======================================================================= |
31 | |
32 | Extrema_GenLocateExtPC::Extrema_GenLocateExtPC() |
33 | { |
34 | myDone = Standard_False; |
35 | } |
36 | |
37 | |
38 | //======================================================================= |
39 | //function : Extrema_GenLocateExtPC |
40 | //purpose : |
41 | //======================================================================= |
42 | |
43 | Extrema_GenLocateExtPC::Extrema_GenLocateExtPC (const Pnt& P, |
44 | const Curve& C, |
45 | const Standard_Real U0, |
46 | const Standard_Real TolU) |
47 | { |
48 | Initialize(C, Tool::FirstParameter(C), Tool::LastParameter(C), TolU); |
49 | Perform(P, U0); |
50 | } |
51 | |
52 | |
53 | //======================================================================= |
54 | //function : Extrema_GenLocateExtPC |
55 | //purpose : |
56 | //======================================================================= |
57 | |
58 | Extrema_GenLocateExtPC::Extrema_GenLocateExtPC (const Pnt& P, |
59 | const Curve& C, |
60 | const Standard_Real U0, |
61 | const Standard_Real Umin, |
62 | const Standard_Real Usup, |
63 | const Standard_Real TolU) |
64 | { |
65 | Initialize(C, Umin, Usup, TolU); |
66 | Perform(P, U0); |
67 | } |
68 | |
69 | |
70 | //======================================================================= |
71 | //function : Initialize |
72 | //purpose : |
73 | //======================================================================= |
74 | |
75 | void Extrema_GenLocateExtPC::Initialize(const Curve& C, |
76 | const Standard_Real Umin, |
77 | const Standard_Real Usup, |
78 | const Standard_Real TolU) |
79 | { |
80 | myDone = Standard_False; |
81 | myF.Initialize(C); |
82 | myumin = Umin; |
83 | myusup = Usup; |
84 | mytolU = TolU; |
85 | } |
86 | |
87 | |
88 | //======================================================================= |
89 | //function : Perform |
90 | //purpose : |
91 | //======================================================================= |
92 | |
93 | void Extrema_GenLocateExtPC::Perform(const Pnt& P, |
94 | const Standard_Real U0) |
95 | |
96 | /*----------------------------------------------------------------------------- |
97 | Fonction: |
98 | Recherche de la valeur de parametre U telle que: |
99 | - dist(P,C(u)) passe par un extremum, |
100 | - U soit la solution la plus proche de U0. |
101 | |
102 | Methode: |
103 | Si U est solution, alors F(U)=(C(U)-P).C'(U) = 0. |
104 | Le probleme consiste a rechercher, dans l'intervalle de definition |
105 | de la courbe, la racine de F la plus proche de U0. |
106 | On utilise la classe math_FunctionRoot avec les arguments de |
107 | construction suivants: |
108 | - F: Extrema_FuncExtPC cree a partir de P et C, |
109 | - U0, |
110 | - TolU, |
111 | - Uinf: borne inferieure de l'intervalle de definition, |
112 | - Ulast: borne superieure de l'intervalle de definition, |
113 | - 100. . |
114 | -----------------------------------------------------------------------------*/ |
115 | { |
116 | myF.SetPoint(P); |
117 | math_FunctionRoot S (myF, U0, mytolU, myumin, myusup); |
118 | myDone = S.IsDone(); |
119 | if (myDone) { |
120 | Standard_Real uu, ff; |
121 | POnC PP = Point(); |
122 | uu = PP.Parameter(); |
123 | if(myF.Value(uu, ff)) { |
124 | if (Abs(ff) >= 1.e-07) myDone = Standard_False; |
125 | } |
126 | else myDone = Standard_False; |
127 | } |
128 | } |
129 | |
130 | //======================================================================= |
131 | //function : IsDone |
132 | //purpose : |
133 | //======================================================================= |
134 | |
135 | Standard_Boolean Extrema_GenLocateExtPC::IsDone () const |
136 | { |
137 | return myDone; |
138 | } |
139 | |
140 | |
141 | //======================================================================= |
142 | //function : Value |
143 | //purpose : |
144 | //======================================================================= |
145 | |
146 | Standard_Real Extrema_GenLocateExtPC::SquareDistance() const |
147 | { |
148 | if (!myDone) { StdFail_NotDone::Raise(); } |
149 | return myF.SquareDistance(1); |
150 | } |
151 | |
152 | |
153 | //======================================================================= |
154 | //function : IsMin |
155 | //purpose : |
156 | //======================================================================= |
157 | |
158 | Standard_Boolean Extrema_GenLocateExtPC::IsMin () const |
159 | { |
160 | if (!myDone) { StdFail_NotDone::Raise(); } |
161 | return myF.IsMin(1); |
162 | } |
163 | |
164 | |
165 | //======================================================================= |
166 | //function : Point |
167 | //purpose : |
168 | //======================================================================= |
169 | |
170 | POnC Extrema_GenLocateExtPC::Point () const |
171 | { |
172 | if (!myDone) { StdFail_NotDone::Raise(); } |
173 | return myF.Point(1); |
174 | } |
175 | |