mesh_smoother_vsmoother.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2025 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_MESH_SMOOTHER_VSMOOTHER_H
#define LIBMESH_MESH_SMOOTHER_VSMOOTHER_H

#include "libmesh/libmesh_config.h"
#if defined(LIBMESH_ENABLE_VSMOOTHER)

// Local Includes
#include "libmesh/libmesh_common.h"
#include "libmesh/mesh_smoother.h"
#include "libmesh/variational_smoother_system.h"
#include "petsc_diff_solver.h"

// C++ Includes
#include <cstddef>
#include <vector>
#include <map>
#include <fstream>

namespace libMesh
{

// Forward declarations
class UnstructuredMesh;

class VariationalMeshSmoother : public MeshSmoother
{
public:

  VariationalMeshSmoother(UnstructuredMesh & mesh,
                          Real dilation_weight=0.5,
                          const bool preserve_subdomain_boundaries=true);

  virtual ~VariationalMeshSmoother() = default;

  virtual void smooth() override {this->smooth(1); }

  void smooth(unsigned int n_iterations);


private:

  const Real _dilation_weight;

  const bool _preserve_subdomain_boundaries;
};

} // namespace libMesh

#endif // defined(LIBMESH_ENABLE_VSMOOTHER)

#endif // LIBMESH_MESH_SMOOTHER_VSMOOTHER_H