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// Copyright (C) 2008-2009 Solveig Bruvoll and Anders Logg
//
// This file is part of DOLFIN.
//
// DOLFIN 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// First added:  2008-05-02
// Last changed: 2010-03-02

#ifndef __ALE_H
#define __ALE_H

namespace dolfin
{

  class Mesh;
  class BoundaryMesh;
  class Function;

  /// This class provides functionality useful for implementation of
  /// ALE (Arbitrary Lagrangian-Eulerian) methods, in particular
  /// moving the boundary vertices of a mesh and then interpolating
  /// the new coordinates for the interior vertices accordingly.

  class ALE
  {
  public:

    /// Move coordinates of mesh according to new boundary coordinates
    static void move(Mesh& mesh, const BoundaryMesh& new_boundary);

    /// Move coordinates of mesh0 according to mesh1 with common global vertices
    static void move(Mesh& mesh0, const Mesh& mesh1);

    /// Move coordinates of mesh according to displacement function
    static void move(Mesh& mesh, const Function& displacement);

  };

}

#endif