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InputDat.cpp
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2 //
3 // File: InputDat.cpp
4 //
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9 // Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
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31 //
32 // Description: Read tecplot dat for isontours in 2D triangular FE block format
33 //
34 ////////////////////////////////////////////////////////////////////////////////
35 
36 #include <iostream>
37 #include <string>
38 using namespace std;
39 
42 
43 #include <tinyxml.h>
44 
45 #include "InputDat.h"
46 
47 namespace Nektar
48 {
49 namespace FieldUtils
50 {
51 
52 ModuleKey InputDat::m_className[1] = {
54  ModuleKey(eInputModule, "dat"),
55  InputDat::create,
56  "Reads Tecplot dat file for FE block triangular format."),
57 };
58 
59 /**
60  * @brief Set up InputDat object.
61  *
62  */
63 InputDat::InputDat(FieldSharedPtr f) : InputModule(f)
64 {
65  m_allowedFiles.insert("dat");
66 }
67 
68 /**
69  *
70  */
72 {
73 }
74 
75 /**
76  *
77  */
78 void InputDat::Process(po::variables_map &vm)
79 {
80 
81  if (m_f->m_verbose)
82  {
83  if (m_f->m_comm->TreatAsRankZero())
84  {
85  cout << "Processing input dat file" << endl;
86  }
87  }
88 
89  string line, word, tag;
90  std::ifstream datFile;
91  stringstream s;
92 
93  // Open the file stream.
94  string fname = m_f->m_inputfiles["dat"][0];
95 
96  datFile.open(fname.c_str());
97  if (!datFile.good())
98  {
99  cerr << "Error opening file: " << fname << endl;
100  abort();
101  }
102 
103  // read variables
104  // currently assum there are x y and z coordinates
105  int dim = 3;
106  vector<string> fieldNames;
107  while (!datFile.eof())
108  {
109  getline(datFile, line);
110  string linetest = line;
111  boost::to_upper(linetest);
112  if (linetest.find("VARIABLES") != string::npos)
113  {
114  std::size_t pos = line.find('=');
115  pos++;
116 
117  // note this expects a comma separated list but
118  // does not work for white space separated lists!
120  line.substr(pos).c_str(), fieldNames);
121  ASSERTL0(valid, "Unable to process list of field variable in "
122  " VARIABLES list: " +
123  line.substr(pos));
124 
125  // remove coordinates from fieldNames
126  fieldNames.erase(fieldNames.begin(), fieldNames.begin() + dim);
127 
128  break;
129  }
130  }
131 
132  // set up basic parameters
133  int nfields = fieldNames.size();
134  int totvars = dim + nfields;
135  Array<OneD, Array<OneD, NekDouble> > pts(totvars);
136  vector<Array<OneD, int> > ptsConn;
137 
138  // read zones
139  while (!datFile.eof())
140  {
141  getline(datFile, line);
142  string linetest = line;
143  boost::to_upper(linetest);
144  if ((linetest.find("ZONE") != string::npos))
145  {
146  ReadTecplotFEBlockZone(datFile, line, pts, ptsConn);
147  }
148  }
149 
150  datFile.close();
151 
153  dim, fieldNames, pts);
154  m_f->m_fieldPts->SetPtsType(LibUtilities::ePtsTriBlock);
155  m_f->m_fieldPts->SetConnectivity(ptsConn);
156 }
157 
158 /**
159  *
160  */
161 void InputDat::ReadTecplotFEBlockZone(std::ifstream &datFile,
162  string &line,
164  vector<Array<OneD, int> > &ptsConn)
165 {
166  ASSERTL0(line.find("FEBlock") != string::npos,
167  "Routine only set up for FEBLock format");
168  ASSERTL0(line.find("ET") != string::npos, "Routine only set up TRIANLES");
169 
170  // read the number of nodes
171 
172  stringstream s;
173  string tag;
174  int start, end;
175 
176  s.clear();
177  s.str(line);
178  tag = s.str();
179 
180  // read the number of vertices
181  start = tag.find("N=");
182  end = tag.find_first_of(',', start);
183  int nvert = atoi(tag.substr(start + 2, end).c_str());
184 
185  // read the number of elements
186  start = tag.find("E=");
187  end = tag.find_first_of(',', start);
188  int nelmt = atoi(tag.substr(start + 2, end).c_str());
189 
190  // set-up or extend m_pts array;
191  int norigpts = pts[0].num_elements();
192  int totfields = pts.num_elements();
193  Array<OneD, Array<OneD, NekDouble> > origpts(totfields);
194  for (int i = 0; i < totfields; ++i)
195  {
196  origpts[i] = pts[i];
197  pts[i] = Array<OneD, NekDouble>(norigpts + nvert);
198  }
199 
200  NekDouble value;
201  for (int n = 0; n < totfields; ++n)
202  {
203 
204  for (int i = 0; i < norigpts; ++i)
205  {
206  pts[n][i] = origpts[n][i];
207  }
208  for (int i = 0; i < nvert; ++i)
209  {
210  datFile >> value;
211  pts[n][norigpts + i] = value;
212  }
213  }
214 
215  // read connectivity and add to list
216  int intvalue;
217  Array<OneD, int> conn(3 * nelmt);
218  for (int i = 0; i < 3 * nelmt; ++i)
219  {
220  datFile >> intvalue;
221  intvalue -= 1; // decrement intvalue by 1 for c array convention
222  conn[i] = norigpts + intvalue;
223  }
224  ptsConn.push_back(conn);
225 
226  getline(datFile, line);
227 }
228 }
229 }
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:198
static bool GenerateOrderedStringVector(const char *const str, std::vector< std::string > &vec)
Definition: ParseUtils.hpp:143
static boost::shared_ptr< DataType > AllocateSharedPtr()
Allocate a shared pointer from the memory pool.
virtual void Process(po::variables_map &vm)
Definition: InputDat.cpp:78
STL namespace.
void ReadTecplotFEBlockZone(std::ifstream &datFile, string &line, Array< OneD, Array< OneD, NekDouble > > &pts, vector< Array< OneD, int > > &ptsConn)
Definition: InputDat.cpp:161
pair< ModuleType, string > ModuleKey
Abstract base class for input modules.
boost::shared_ptr< Field > FieldSharedPtr
Definition: Field.hpp:767
double NekDouble
ModuleFactory & GetModuleFactory()
FieldSharedPtr m_f
Field object.
tKey RegisterCreatorFunction(tKey idKey, CreatorFunction classCreator, tDescription pDesc="")
Register a class with the factory.
Definition: NekFactory.hpp:215