postscript_io.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2018 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_POSTSCRIPT_IO_H
#define LIBMESH_POSTSCRIPT_IO_H

// Local includes
#include "libmesh/libmesh_common.h"
#include "libmesh/mesh_output.h"
//#include "libmesh/dense_matrix.h"
#include "libmesh/point.h"

// C++ includes
#include <fstream>
#include <sstream>
#include <vector>

namespace libMesh
{

// Forward declarations
class MeshBase;
class Elem;

class PostscriptIO : public MeshOutput<MeshBase>
{
public:
  explicit
  PostscriptIO (const MeshBase & mesh);

  virtual ~PostscriptIO ();

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

  Real shade_value;

  Real line_width;

  void plot_quadratic_elem(const Elem * elem);

  void plot_linear_elem(const Elem * elem);

private:
  void _compute_edge_bezier_coeffs(const Elem * elem);

  //DenseMatrix<float> _M;
  static const float _bezier_transform[3][3];

  std::vector<Point> _bezier_coeffs;

  Point _offset;

  Real _scale;

  Point _current_point;

  std::ostringstream _cell_string;

  std::ofstream _out;
};

} // namespace libMesh

#endif // LIBMESH_POSTSCRIPT_IO_H