Method ExchangeVals

Filters/Parallel/vtkPKdTree.cxx:858–893

}

void vtkPKdTree::ExchangeVals(int pos1, int pos2)
{
  vtkCommunicator* comm = this->Controller->GetCommunicator();

  float* myval;
  float otherval[3];

  int player1 = this->WhoHas(pos1);
  int player2 = this->WhoHas(pos2);

  if ((player1 == this->MyId) && (player2 == this->MyId))
  {
    this->ExchangeLocalVals(pos1, pos2);
  }

  else if (player1 == this->MyId)
  {
    myval = this->GetLocalVal(pos1);

    comm->Send(myval, 3, player2, this->SubGroup->tag);

    comm->Receive(otherval, 3, player2, this->SubGroup->tag);

    this->SetLocalVal(pos1, otherval);
  }
  else if (player2 == this->MyId)
  {
    myval = this->GetLocalVal(pos2);

    comm->Receive(otherval, 3, player1, this->SubGroup->tag);

    comm->Send(myval, 3, player1, this->SubGroup->tag);

    this->SetLocalVal(pos2, otherval);
  }
}

// Given an array X with element indices ranging from L to R, and
// a K such that L <= K <= R, rearrange the elements such that