Method AddFirstGhostLevel

Filters/Parallel/vtkExtractUnstructuredGridPiece.cxx:375–407

}

void vtkExtractUnstructuredGridPiece::AddFirstGhostLevel(
  vtkUnstructuredGrid* input, vtkIntArray* cellTags, int piece, int numPieces)
{
  const vtkIdType numCells = input->GetNumberOfCells();
  vtkNew<vtkIdList> cellPointIds;
  vtkNew<vtkIdList> neighborIds;

  // for level 1 we have an optimal implementation
  // that can compute the subset of cells we need to check
  vtkIdType minCell = 0;
  vtkIdType maxCell = 0;
  determineMinMax(piece, numPieces, numCells, minCell, maxCell);
  for (vtkIdType idx = minCell; idx < maxCell; ++idx)
  {
    input->GetCellPoints(idx, cellPointIds);
    const vtkIdType numCellPoints = cellPointIds->GetNumberOfIds();
    for (vtkIdType j = 0; j < numCellPoints; j++)
    {
      const vtkIdType pointId = cellPointIds->GetId(j);
      input->GetPointCells(pointId, neighborIds);

      const vtkIdType numNeighbors = neighborIds->GetNumberOfIds();
      for (vtkIdType k = 0; k < numNeighbors; ++k)
      {
        const vtkIdType neighborCellId = neighborIds->GetId(k);
        if (cellTags->GetValue(neighborCellId) == -1)
        {
          cellTags->SetValue(neighborCellId, 1);
        }
      }
    }
  }
}

void vtkExtractUnstructuredGridPiece::AddGhostLevel(
  vtkUnstructuredGrid* input, vtkIntArray* cellTags, int level)