/usr/include/libmesh/postscript_io.h is in libmesh-dev 0.7.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | // $Id: postscript_io.h 3928 2010-08-24 22:39:45Z roystgnr $
// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 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 __postscript_io_h__
#define __postscript_io_h__
// C++ includes
#include <vector>
// Local includes
#include "libmesh_common.h"
#include "mesh_output.h"
//#include "dense_matrix.h"
#include "point.h"
namespace libMesh
{
// Forward declarations
class MeshBase;
class Elem;
/**
* This class implements writing 2D meshes in Postscript. It borrows
* several ideas from, and is a more simple-minded version of, the
* DataOutBase::write_eps() function from Deal II. Only output is
* supported here, and only the Mesh (none of the data) is written.
* The main use I imagined for this class is creating nice Mesh
* images for publications, since I didn't find/don't know of a free
* visualization program which would do this.
*
* @author John W. Peterson, 2008
*/
class PostscriptIO : public MeshOutput<MeshBase>
{
public:
/**
* Constructor.
*/
PostscriptIO (const MeshBase& mesh);
/**
* Destructor.
*/
virtual ~PostscriptIO ();
/**
* This method implements writing a mesh to a specified file.
*/
virtual void write (const std::string& );
/**
* Controls greyscale shading of cells. By default this value
* is 0.0 (which actually corresponds to black) and this indicates
* "no shading" i.e. only mesh lines will be drawn. Any other
* value in (0,1] will cause the cells to be grey-shaded to some
* degree, with higher values being lighter. A value of 0.75
* gives decent results.
*/
Real shade_value;
/**
* Control the thickness of the lines used. 0.5 is a reasonable default
* for printed images, but you may need to decrease this value (or
* choose it adaptively) when there are very slim cells present in
* the mesh.
*/
Real line_width;
/**
* Draws an element with Bezier curves
*/
void plot_quadratic_elem(const Elem* elem);
/**
* Draws an element with straight lines
*/
void plot_linear_elem(const Elem* elem);
private:
/**
* Given a quadratic edge Elem which lies in the x-y plane,
* computes the Bezier coefficients. These may be passed to
* the Postscript routine "curveto".
*/
void _compute_edge_bezier_coeffs(const Elem* elem);
/**
* Coefficients of the transformation from physical-space
* edge coordinates to Bezier basis coefficients. Transforms
* x and y separately.
*/
//DenseMatrix<float> _M;
static const float _bezier_transform[3][3];
/**
* Vector containing 3 points corresponding to Bezier coefficients,
* as computed by _compute_edge_bezier_coeffs.
*/
std::vector<Point> _bezier_coeffs;
/**
* Amount to add to every (x,y) point to place it in Postscript coordinates.
*/
Point _offset;
/**
* Amount by which to stretch each point to place it in Postscript coordinates.
*/
Real _scale;
/**
* A point object used for temporary calculations
*/
Point _current_point;
/**
* Drawing style-independent data for a single cell. This can be
* used as a temporary buffer for storing data which may be sent to
* the output stream multiple times.
*/
std::ostringstream _cell_string;
/**
* Output file stream which will be opened when the file name is known
*/
std::ofstream _out;
};
} // namespace libMesh
#endif // #ifndef __postscript_io_h__
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