Method GetCellIdsForProcess

Filters/ParallelGeometry/vtkPDistributedDataFilter.cxx:2540–2580

// vtkKdTree::DeleteCellLists will delete them all when we're done.

vtkIdList** vtkPDistributedDataFilter::GetCellIdsForProcess(int proc, int* nlists)
{
  TimeLog timer("GetCellIdsForProcess", this->Timing);
  (void)timer;

  *nlists = 0;

  vtkIntArray* regions = vtkIntArray::New();

  int nregions = this->Kdtree->GetRegionAssignmentList(proc, regions);

  if (nregions == 0)
  {
    return nullptr;
  }

  *nlists = nregions;

  if (this->IncludeAllIntersectingCells)
  {
    *nlists *= 2;
  }

  vtkIdList** lists = new vtkIdList*[*nlists];

  int nextList = 0;

  for (int reg = 0; reg < nregions; reg++)
  {
    lists[nextList++] = this->Kdtree->GetCellList(regions->GetValue(reg));

    if (this->IncludeAllIntersectingCells)
    {
      lists[nextList++] = this->Kdtree->GetBoundaryCellList(regions->GetValue(reg));
    }
  }

  regions->Delete();

  return lists;
}

//==========================================================================
// Code related to clipping cells to the spatial region