Method ReadMetaData

IO/NetCDF/vtkNetCDFCFReader.cxx:1777–1870

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkNetCDFCFReader::ReadMetaData(int ncFD)
{
  int numDimensions;
  CALL_NETCDF(this->Accessor->inq_ndims(ncFD, &numDimensions));
  this->DimensionInfo->v.resize(numDimensions);

  std::set<std::string> specialVariables;

  for (int i = 0; i < numDimensions; i++)
  {
    this->DimensionInfo->v[i] =
      vtkDimensionInfo(this->Accessor, ncFD, i, this->SpecialDimensionOverrideNames);

    // Record any special variables for this dimension.
    vtkStringArray* dimensionVariables = this->DimensionInfo->v[i].GetSpecialVariables();
    for (vtkIdType j = 0; j < dimensionVariables->GetNumberOfValues(); j++)
    {
      specialVariables.insert(dimensionVariables->GetValue(j));
    }
  }

  int numVariables;
  CALL_NETCDF(this->Accessor->inq_nvars(ncFD, &numVariables));

  // Check all variables for special 2D coordinates.
  for (int i = 0; i < numVariables; i++)
  {
    vtkDependentDimensionInfo info(this->Accessor, ncFD, i, this);
    if (!info.GetValid())
      continue;
    if (this->FindDependentDimensionInfo(info.GetGridDimensions()) != nullptr)
    {
      continue;
    }

    this->DependentDimensionInfo->v.push_back(info);

    // Record any special variables.
    vtkStringArray* dimensionVariables = info.GetSpecialVariables();
    for (vtkIdType j = 0; j < dimensionVariables->GetNumberOfValues(); j++)
    {
      specialVariables.insert(dimensionVariables->GetValue(j));
    }
  }

  // Look at all variables and record them so that the user can select which
  // ones he wants.  This oddness of adding and removing from
  // VariableArraySelection is to preserve any current settings for variables.
  typedef std::set<std::string> stringSet;
  stringSet variablesToAdd;
  stringSet variablesToRemove;

  // Initialize variablesToRemove with all the variables.  Then remove them from
  // the list as we find them.
  for (int i = 0; i < this->VariableArraySelection->GetNumberOfArrays(); i++)
  {
    variablesToRemove.insert(this->VariableArraySelection->GetArrayName(i));
  }