vtk_io.h

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// 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_VTK_IO_H
#define LIBMESH_VTK_IO_H

// Local includes
#include "libmesh/libmesh_common.h"
#include "libmesh/mesh_input.h"
#include "libmesh/mesh_output.h"

#ifdef LIBMESH_HAVE_VTK
#include "vtkType.h"
#endif

// C++ includes
#include <cstddef>
#include <map>

// Forward declarations

class vtkUnstructuredGrid;
class vtkPoints;
class vtkCellArray;

namespace libMesh
{

class MeshBase;
class MeshData;

// ------------------------------------------------------------
// VTKIO class definition
class VTKIO : public MeshInput<MeshBase>,
              public MeshOutput<MeshBase>
{
public:
  explicit
  VTKIO (MeshBase& mesh, MeshData* mesh_data=NULL);

  explicit
  VTKIO (const MeshBase& mesh, MeshData* mesh_data=NULL);

  virtual void write_nodal_data (const std::string&,
                                 const std::vector<Number>&,
                                 const std::vector<std::string>&);

  // virtual void write_equation_systems(const std::string& fname,
  //                                     const EquationSystems& es,
  //                                     const std::set<std::string>* system_names=NULL);

  virtual void read (const std::string&);

  virtual void write (const std::string&);

  vtkUnstructuredGrid* get_vtk_grid();

  void set_compression(bool b);

private:
#ifdef LIBMESH_HAVE_VTK

  vtkIdType get_elem_type(ElemType type);
#endif

  void nodes_to_vtk();

  void cells_to_vtk();

  void system_vectors_to_vtk(const EquationSystems& es, vtkUnstructuredGrid*& grid);

  vtkUnstructuredGrid* _vtk_grid;

  MeshData* _mesh_data;

  bool _compress;

  std::map<dof_id_type, dof_id_type> _local_node_map;
};



} // namespace libMesh


#endif // LIBMESH_VTK_IO_H