Nektar++
InputDat.cpp
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3 // File: InputDat.cpp
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31 //
32 // Description: Read tecplot dat for isontours in 2D triangular FE block format
33 //
34 ////////////////////////////////////////////////////////////////////////////////
35 
36 #include <string>
37 #include <iostream>
38 using namespace std;
39 
42 
43 #include <tinyxml.h>
44 
45 #include "InputDat.h"
46 
47 namespace Nektar
48 {
49 namespace Utilities
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  *
71  */
73 {
74 }
75 
76 
77 /**
78  *
79  */
80 void InputDat::Process(po::variables_map &vm)
81 {
82 
83  if(m_f->m_verbose)
84  {
85  cout << "Processing input dat file" << endl;
86  }
87 
88  string line, word, tag;
89  std::ifstream datFile;
90  stringstream s;
91 
92  // Open the file stream.
93  string fname = m_f->m_inputfiles["dat"][0];
94 
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 
111  if(line.find("VARIABLES") != string::npos)
112  {
113  std::size_t pos = line.find('=');
114  pos++;
115 
116  // note this expects a comma separated list but
117  // does not work for white space separated lists!
119  line.substr(pos).c_str(), fieldNames);
120  ASSERTL0(valid,"Unable to process list of field variable in "
121  " VARIABLES list: "+ line.substr(pos));
122 
123  // remove coordinates from fieldNames
124  fieldNames.erase(fieldNames.begin(), fieldNames.begin() + dim);
125 
126  break;
127  }
128  }
129 
130  // set up basic parameters
131  int nfields = fieldNames.size();
132  int totvars = dim + nfields;
133  Array<OneD, Array<OneD, NekDouble> > pts(totvars);
134  vector<Array<OneD, int> > ptsConn;
135 
136  // read zones
137  while (!datFile.eof())
138  {
139  getline(datFile, line);
140 
141  if((line.find("ZONE") != string::npos)||
142  (line.find("Zone") != string::npos)||
143  (line.find("zone") != string::npos))
144  {
145  ReadTecplotFEBlockZone(datFile, line, pts, ptsConn);
146  }
147  }
148 
149  datFile.close();
150 
151  m_f->m_fieldPts =
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  */
163  std::ifstream &datFile,
164  string &line,
166  vector<Array<OneD, int> > &ptsConn)
167 {
168  ASSERTL0(line.find("FEBlock") != string::npos,
169  "Routine only set up for FEBLock format");
170  ASSERTL0(line.find("ET") != string::npos,
171  "Routine only set up TRIANLES");
172 
173  // read the number of nodes
174 
175  stringstream s;
176  string tag;
177  int start,end;
178 
179  s.clear();
180  s.str(line);
181  tag = s.str();
182 
183  // read the number of vertices
184  start = tag.find("N=");
185  end = tag.find_first_of(',',start);
186  int nvert = atoi(tag.substr(start+2,end).c_str());
187 
188  // read the number of elements
189  start = tag.find("E=");
190  end = tag.find_first_of(',',start);
191  int nelmt = atoi(tag.substr(start+2,end).c_str());
192 
193  // set-up or extend m_pts array;
194  int norigpts = pts[0].num_elements();
195  int totfields = pts.num_elements();
196  Array<OneD, Array<OneD, NekDouble> > origpts(totfields);
197  for(int i = 0; i < totfields; ++i)
198  {
199  origpts[i] = pts[i];
200  pts[i] = Array<OneD, NekDouble>(norigpts + nvert);
201  }
202 
203  NekDouble value;
204  for(int n = 0; n < totfields; ++n)
205  {
206 
207  for(int i = 0; i < norigpts; ++i)
208  {
209  pts[n][i] = origpts[n][i];
210  }
211  for(int i = 0; i < nvert; ++i)
212  {
213  datFile >> value;
214  pts[n][norigpts+i] = value;
215  }
216  }
217 
218  // read connectivity and add to list
219  int intvalue;
220  Array<OneD, int> conn(3*nelmt);
221  for(int i = 0; i < 3*nelmt; ++i)
222  {
223  datFile >> intvalue;
224  intvalue -=1; // decrement intvalue by 1 for c array convention
225  conn[i] = norigpts + intvalue;
226  }
227  ptsConn.push_back(conn);
228 
229  getline(datFile, line);
230 }
231 
232 
233 }
234 }
235 
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:161
static bool GenerateOrderedStringVector(const char *const str, std::vector< std::string > &vec)
Definition: ParseUtils.hpp:142
pair< ModuleType, string > ModuleKey
static boost::shared_ptr< DataType > AllocateSharedPtr()
Allocate a shared pointer from the memory pool.
virtual void Process()=0
STL namespace.
FieldSharedPtr m_f
Field object.
void ReadTecplotFEBlockZone(std::ifstream &datFile, string &line, Array< OneD, Array< OneD, NekDouble > > &pts, vector< Array< OneD, int > > &ptsConn)
Definition: InputDat.cpp:162
double NekDouble
boost::shared_ptr< Field > FieldSharedPtr
Definition: Field.hpp:677
ModuleFactory & GetModuleFactory()
Abstract base class for input modules.
tKey RegisterCreatorFunction(tKey idKey, CreatorFunction classCreator, tDescription pDesc="")
Register a class with the factory.
Definition: NekFactory.hpp:215