libMesh
postscript_io.h
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1 // The libMesh Finite Element Library.
2 // Copyright (C) 2002-2017 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
3 
4 // This library is free software; you can redistribute it and/or
5 // modify it under the terms of the GNU Lesser General Public
6 // License as published by the Free Software Foundation; either
7 // version 2.1 of the License, or (at your option) any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // Lesser General Public License for more details.
13 
14 // You should have received a copy of the GNU Lesser General Public
15 // License along with this library; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 
18 
19 
20 #ifndef LIBMESH_POSTSCRIPT_IO_H
21 #define LIBMESH_POSTSCRIPT_IO_H
22 
23 // Local includes
24 #include "libmesh/libmesh_common.h"
25 #include "libmesh/mesh_output.h"
26 //#include "libmesh/dense_matrix.h"
27 #include "libmesh/point.h"
28 
29 // C++ includes
30 #include <fstream>
31 #include <sstream>
32 #include <vector>
33 
34 namespace libMesh
35 {
36 
37 // Forward declarations
38 class MeshBase;
39 class Elem;
40 
53 class PostscriptIO : public MeshOutput<MeshBase>
54 {
55 public:
59  explicit
60  PostscriptIO (const MeshBase & mesh);
61 
65  virtual ~PostscriptIO ();
66 
70  virtual void write (const std::string &) libmesh_override;
71 
81 
89 
93  void plot_quadratic_elem(const Elem * elem);
94 
98  void plot_linear_elem(const Elem * elem);
99 
100 private:
106  void _compute_edge_bezier_coeffs(const Elem * elem);
107 
113  //DenseMatrix<float> _M;
114  static const float _bezier_transform[3][3];
115 
120  std::vector<Point> _bezier_coeffs;
121 
126 
131 
136 
142  std::ostringstream _cell_string;
143 
147  std::ofstream _out;
148 };
149 
150 } // namespace libMesh
151 
152 #endif // LIBMESH_POSTSCRIPT_IO_H
void plot_linear_elem(const Elem *elem)
Draws an element with straight lines.
virtual ~PostscriptIO()
Destructor.
Definition: postscript_io.C:65
std::ofstream _out
Output file stream which will be opened when the file name is known.
Point _offset
Amount to add to every (x,y) point to place it in Postscript coordinates.
void _compute_edge_bezier_coeffs(const Elem *elem)
Given a quadratic edge Elem which lies in the x-y plane, computes the Bezier coefficients.
This class implements writing 2D meshes in Postscript.
Definition: postscript_io.h:53
This is the base class from which all geometric element types are derived.
Definition: elem.h:89
const MeshBase & mesh() const
This class defines an abstract interface for Mesh output.
Definition: mesh_output.h:53
The libMesh namespace provides an interface to certain functionality in the library.
Point _current_point
A point object used for temporary calculations.
static const float _bezier_transform[3][3]
Coefficients of the transformation from physical-space edge coordinates to Bezier basis coefficients...
This is the MeshBase class.
Definition: mesh_base.h:68
Real shade_value
Controls greyscale shading of cells.
Definition: postscript_io.h:80
virtual void write(const std::string &) libmesh_override
This method implements writing a mesh to a specified file.
Definition: postscript_io.C:71
PostscriptIO(const MeshBase &mesh)
Constructor.
Definition: postscript_io.C:42
Real line_width
Control the thickness of the lines used.
Definition: postscript_io.h:88
Real _scale
Amount by which to stretch each point to place it in Postscript coordinates.
std::vector< Point > _bezier_coeffs
Vector containing 3 points corresponding to Bezier coefficients, as computed by _compute_edge_bezier_...
std::ostringstream _cell_string
Drawing style-independent data for a single cell.
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
void plot_quadratic_elem(const Elem *elem)
Draws an element with Bezier curves.
A Point defines a location in LIBMESH_DIM dimensional Real space.
Definition: point.h:38