cell.C

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2019 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
// Local includes
#include "libmesh/cell.h"
 
 
namespace libMesh
{
 
BoundingBox Cell::loose_bounding_box () const
{
  // This might have curved sides, but it's definitely *not* curving
  // through 4-D space, so the full bounding box is just the merger of
  // the sides' bounding boxes.
 
  std::unique_ptr<const Elem> side_ptr { this->build_side_ptr(0, false) };
  BoundingBox bbox = side_ptr->loose_bounding_box();
  unsigned int my_n_sides = this->n_sides();
  for (unsigned s=1; s < my_n_sides; ++s)
    {
      this->build_side_ptr(side_ptr, s);
      bbox.union_with(side_ptr->loose_bounding_box());
    }
 
  return bbox;
}
 
} // namespace libMesh