FreeFOAM The Cross-Platform CFD Toolkit
curve.C
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1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
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9  This file is part of OpenFOAM.
10 
11  OpenFOAM is free software: you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation, either version 3 of the License, or
14  (at your option) any later version.
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19  for more details.
20 
21  You should have received a copy of the GNU General Public License
22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 Description
25 
26 \*---------------------------------------------------------------------------*/
27 
28 #include "curve.H"
29 //#include "curveTools.H"
30 #include <OpenFOAM/Ostream.H>
31 
32 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
33 
34 namespace Foam
35 {
36 
37 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
38 
39 // construct as interpolation
40 /*
41 curve::curve(const curve& Curve, const label nFacets)
42 :
43  Name("Interpolated" + Curve.Name),
44  Style(Curve.Style),
45  X(2*nFacets),
46  Y(2*nFacets)
47 {
48  // Calculate curve length
49  scalar curveLength=0;
50  register label i;
51  for (i=0; i<Curve.size()-1; i++)
52  {
53  curveLength += distance(Curve[i], Curve[i+1]);
54  }
55 
56  scalar stepLength = curveLength/nFacets;
57  label nPoints = 0;
58  label previous=0, next=1;
59  bool endOfCurve;
60  vector presentPoint=Curve[0], nextPoint;
61 
62  do
63  {
64  endOfCurve =
65  stepForwardsToNextPoint
66  (
67  presentPoint,
68  nextPoint,
69  previous,
70  next,
71  stepLength,
72  Curve
73  );
74 
75  if (!endOfCurve)
76  {
77  if (nPoints >= size()-1)
78  {
79  setSize(label(1.5*size()));
80  }
81 
82  presentPoint = nextPoint;
83 
84  x()[nPoints] = nextPoint.x();
85  y()[nPoints] = nextPoint.y();
86 
87  nPoints++;
88  }
89 
90  } while (!endOfCurve);
91 
92  setSize(nPoints);
93 }
94 */
95 
96 
97 // construct given name, style and size
99 (
100  const string& name,
101  const curveStyle& style,
102  const label l
103 )
104 :
105  scalarField(l, 0.0),
106  name_(name),
107  style_(style)
108 {}
109 
110 
111 // construct from the bits
113 (
114  const string& name,
115  const curveStyle& style,
116  const scalarField& y
117 )
118 :
119  scalarField(y),
120  name_(name),
121  style_(style)
122 {}
123 
124 
125 // * * * * * * * * * * * * * * * Friend Functions * * * * * * * * * * * * * //
126 
127 // Gradient operation
128 /*
129 curve grad(const curve& Curve)
130 {
131  curve gradCurve(Curve);
132 
133  register label i;
134  for (i=1; i<Curve.size()-1; i++)
135  {
136  scalar deltaIm1 = Curve[i].x() - Curve[i-1].x();
137  scalar deltaI = Curve[i+1].x() - Curve[i].x();
138 
139  scalar deltaAv = 1.0/deltaIm1 + 1.0/deltaI;
140 
141  gradCurve.y()[i] =
142  (
143  (Curve[i+1].y() - Curve[i].y())/sqr(deltaI)
144  + (Curve[i].y() - Curve[i-1].y())/sqr(deltaIm1)
145  )/deltaAv;
146  }
147 
148  gradCurve.y()[0] =
149  (Curve[1].y() - Curve[0].y())/(Curve[1].x() - Curve[0].x());
150 
151  label n = Curve.size()-1;
152 
153  gradCurve.y()[n] =
154  (Curve[n].y() - Curve[n-1].y())/(Curve[n].x() - Curve[n-1].x());
155 
156  return gradCurve;
157 }
158 */
159 
160 
161 // * * * * * * * * * * * * * * * IOstream Operators * * * * * * * * * * * * //
162 
164 {
165  os << nl
166  << c.name_ << nl
167  << c.style_ << nl
168  << static_cast<const scalarField&>(c);
169 
170  os.check("Ostream& operator>>(Ostream&, const curve&)");
171 
172  return os;
173 }
174 
175 
176 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
177 
178 } // End namespace Foam
179 
180 // ************************ vim: set sw=4 sts=4 et: ************************ //