Method IsFaceOnBoundary

Testing/GenericBridge/vtkBridgeCell.cxx:645–672

For the internals of the tessellation algorithm (the hash table in particular) Is the face `faceId' of the current cell on a exterior boundary of the dataset or not? \pre 3d: GetDimension()==3 ------------------------------------------------------------------------------

// \pre 3d: GetDimension()==3
//------------------------------------------------------------------------------
int vtkBridgeCell::IsFaceOnBoundary(vtkIdType faceId)
{
  assert("pre: 3d" && this->GetDimension() == 3);

  // result=CountNeighbors(boundary(faceId))==0;

  vtkCell* face = this->Cell->GetFace(faceId);
  vtkIdList* cells = vtkIdList::New(); // expensive
  this->DataSet->Implementation->GetCellNeighbors(this->Id, face->GetPointIds(), cells);

  int result = cells->GetNumberOfIds() == 0;
  cells->Delete(); // expensive
#if 0
  if(this->GetType()==VTK_QUADRATIC_TETRA)
  {
    if(result)
    {
      cout<<"************************************************ boundary"<<endl;
    }
    else
    {
      cout<<"************************************************ NOT boundary"<<endl;
    }
//    assert(result);
  }
#endif
  return result;
}

// Is the cell on the exterior boundary of the dataset?
// \pre 2d: GetDimension()==2