Method FillGhostArrays

Filters/Geometry/vtkStructuredGridConnectivity.cxx:453–492

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//------------------------------------------------------------------------------
void vtkStructuredGridConnectivity::FillGhostArrays(
  int gridID, vtkUnsignedCharArray* nodesArray, vtkUnsignedCharArray* cellsArray)
{
  if (nodesArray == nullptr)
  {
    return;
  }

  // STEP 0: Get the grid information
  int GridExtent[6];
  this->GetGridExtent(gridID, GridExtent);

  // STEP 1: Real extent
  int RealExtent[6];
  this->GetRealExtent(gridID, GridExtent, RealExtent);

  // STEP 2: Get the data description
  int dataDescription = vtkStructuredData::GetDataDescriptionFromExtent(GridExtent);

  // STEP 3: Get the cell extent
  int CellExtent[6];
  vtkStructuredData::GetCellExtentFromPointExtent(GridExtent, CellExtent, dataDescription);

  // STEP 4: Get the data dimension
  int dim = vtkStructuredData::GetDataDimension(dataDescription);
  assert("pre: data dimensions must be 1, 2 or 3" && (dim >= 1) && (dim <= 3));

  // STEP 5: Get the grid dimensions from the given extent.
  int dims[3];
  vtkStructuredData::GetDimensionsFromExtent(GridExtent, dims);

  // STEP 6: Get the number of nodes per cell
  int numNodes = this->GetNumberOfNodesPerCell(dim);

  // STEP 7: Mark nodes
  this->FillNodesGhostArray(gridID, dataDescription, GridExtent, RealExtent, nodesArray);

  // STEP 8: Mark Cells
  this->FillCellsGhostArray(dataDescription, numNodes, dims, CellExtent, nodesArray, cellsArray);
}

//------------------------------------------------------------------------------
void vtkStructuredGridConnectivity::GetRealExtent(int gridID, int GridExtent[6], int RealExtent[6])