cell_tet.h

Go to the documentation of this file.

// The libMesh Finite Element Library.
// Copyright (C) 2002-2014 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



#ifndef LIBMESH_CELL_TET_H
#define LIBMESH_CELL_TET_H

// Local includes
#include "libmesh/cell.h"

namespace libMesh
{




class Tet : public Cell
{
public:

  Tet  (const unsigned int nn, Elem* p, Node** nodelinkdata);

  unsigned int n_sides() const { return 4; }

  unsigned int n_vertices() const { return 4; }

  unsigned int n_edges() const { return 6; }

  unsigned int n_faces() const { return 4; }

  unsigned int n_children() const { return 8; }

  /*
   * @returns true iff the specified edge is on the specified side
   */
  virtual bool is_edge_on_side(const unsigned int e,
                               const unsigned int s) const;

  dof_id_type key (const unsigned int s) const;

  UniquePtr<Elem> side (const unsigned int i) const;

  Real quality (const ElemQuality q) const;

  std::pair<Real, Real> qual_bounds (const ElemQuality q) const;

  enum Diagonal
    {
      DIAG_02_13=0,    // diagonal between edges (0,2) and (1,3)
      DIAG_03_12=1,    // diagonal between edges (0,3) and (1,2)
      DIAG_01_23=2,    // diagonal between edges (0,1) and (2,3)
      INVALID_DIAG=99  // diagonal not yet selected
    };

  Diagonal diagonal_selection () const { return _diagonal_selection; }

  void select_diagonal (const Diagonal diag) const;

protected:

  Elem* _elemlinks_data[5+(LIBMESH_DIM>3)];

  bool is_child_on_side_helper(const unsigned int c,
                               const unsigned int s,
                               const unsigned int checked_nodes[][3] ) const;

  mutable Diagonal _diagonal_selection;

  void choose_diagonal() const;

};



// ------------------------------------------------------------
// Tet class member functions
inline
Tet::Tet(const unsigned int nn, Elem* p, Node** nodelinkdata) :
  Cell(nn, Tet::n_sides(), p, _elemlinks_data, nodelinkdata)
  , _diagonal_selection(INVALID_DIAG)
{
}

} // namespace libMesh

#endif // LIBMESH_CELL_TET_H