Method CreateGhostLayers

Filters/ParallelGeometry/vtkPStructuredGridConnectivity.cxx:116–167

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//------------------------------------------------------------------------------
void vtkPStructuredGridConnectivity::CreateGhostLayers(int N)
{
  assert("pre: Instance has not been initialized!" && this->Initialized);
  if (N == 0)
  {
    vtkWarningMacro("N=0 ghost layers requested! No ghost layers will be created!");
    this->Controller->Barrier();
    return;
  }

  this->NumberOfGhostLayers += N;
  this->AllocateInternalDataStructures();
  this->GhostedExtents.resize(this->NumberOfGrids * 6, -1);

  // STEP 0: Compute neighbor send and receive extent
  for (unsigned int i = 0; i < this->NumberOfGrids; ++i)
  {
    this->CreateGhostedExtent(i, N);
    this->ComputeNeighborSendAndRcvExtent(i, N);
  }

  // BEGIN DEBUG
  //  std::ostringstream oss;
  //  oss << "Process" << this->Rank << "-neis.log";
  //  vtksys::ofstream ofs;
  //  ofs.open( oss.str().c_str() );
  //  assert("ERROR: cannot write log file" && ofs.is_open() );
  //  this->Print( ofs );
  //  ofs.close();
  // END DEBUG

  this->Controller->Barrier();

  // STEP 1: Exchange ghost-data
  this->ExchangeGhostData();
  this->Controller->Barrier();

  // STEP 4: Create ghost-layers
  for (unsigned int i = 0; i < this->NumberOfGrids; ++i)
  {
    if (this->IsGridLocal(i))
    {
      this->CreateGhostedMaskArrays(i);
      this->InitializeGhostData(i);
      this->TransferRegisteredDataToGhostedData(i);
      this->TransferGhostDataFromNeighbors(i);
    }
  } // END for all grids

  // STEP 5: Synchronize
  this->Controller->Barrier();
}

//------------------------------------------------------------------------------
void vtkPStructuredGridConnectivity::TransferRemoteNeighborData(