Method SetTimeStepToRead

IO/EnSight/core/EnSightFile.cxx:190–293

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//------------------------------------------------------------------------------
bool EnSightFile::SetTimeStepToRead(double ts)
{
  if ((this->FileSet == -1 && this->TimeSet == -1) || !this->TimeInfo)
  {
    // non transient data
    return this->OpenFile(this->FileNamePattern);
  }

  if (this->TimeInfo->TimeValues.empty())
  {
    vtkGenericWarningMacro(
      "Time sets are used, but some error has caused the TimeValues to be empty");
    return false;
  }

  auto tsIdx = getFileNameNumberIndex(ts, this->TimeInfo);
  if (this->TimeSet != -1 && this->FileSet == -1)
  {
    // only using time sets
    if (tsIdx != this->TimeStepIndex)
    {
      this->TimeStepIndex = tsIdx;
      this->CloseFile();
      std::string filename = this->FileNamePattern;

      // check if the filename contains wildcards
      std::regex exp("\\*+");
      std::smatch sm;
      if (std::regex_search(this->FileNamePattern, sm, exp))
      {
        if (!this->TimeInfo)
        {
          vtkGenericWarningMacro("TimeSet is " << this->TimeSet << ", but TimeInfo was not set");
          return false;
        }
        filename = replaceWildcards(filename, this->TimeInfo->FileNameNumbers[this->TimeStepIndex]);
      }
      if (!this->OpenFile(filename))
      {
        vtkGenericWarningMacro("the file " << filename << " could not be opened");
        return false;
      }
    }
    this->ResetFile();
  }
  else if (this->TimeSet != -1 && this->FileSet != -1)
  {
    std::streampos posToRead;
    int fileIndex = -1;
    int tsIndexForFile = tsIdx;
    if (!this->FileInfo->FileNameIndex.empty())
    {
      // in this case we may have to switch files, depending on what
      // time step we're on
      // otherwise we just stay in the file we already have opened
      fileIndex = getFileSetIndex(tsIdx, this->FileInfo);
      tsIndexForFile = this->FileInfo->TimeStepIndexInFile[tsIdx];
      this->CurrentFileIndex = fileIndex;