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polygon.hh
1 // Copyright (C) 2011 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
8 //
9 // Olena 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 // General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
16 //
17 // As a special exception, you may use this file as part of a free
18 // software project without restriction. Specifically, if other files
19 // instantiate templates or use macros or inpolygon functions from this
20 // file, or you compile this file and link it with other files to produce
21 // an executable, this file does not by itself cause the resulting
22 // executable to be covered by the GNU General Public License. This
23 // exception does not however invalidate any other reasons why the
24 // executable file might be covered by the GNU General Public License.
25 
26 #ifndef MLN_DRAW_POLYGON_HH
27 # define MLN_DRAW_POLYGON_HH
28 
33 
34 # include <mln/core/concept/image.hh>
35 # include <mln/core/site_set/p_array.hh>
36 # include <mln/draw/line.hh>
37 
38 
39 namespace mln
40 {
41 
42  namespace draw
43  {
44 
54  template <typename I>
55  void polygon(Image<I>& ima,
56  const p_array<mln_site(I)>& par,
57  const mln_value(I)& v,
58  unsigned output_ratio);
59 
60  // \overload
61  template <typename I>
62  void polygon(Image<I>& ima,
63  const p_array<mln_site(I)>& par,
64  const mln_value(I)& v);
65 
66 
67 # ifndef MLN_INCLUDE_ONLY
68 
69  template <typename I>
70  void polygon(Image<I>& ima_,
71  const p_array<mln_site(I)>& par,
72  const mln_value(I)& v,
73  unsigned output_ratio)
74  {
75  I& ima = exact(ima_);
76  mln_precondition(ima.is_valid());
77  mln_precondition(par.nelements() > 1);
78 
79  mln_site(I) p_last, tmp;
80  mln_piter(p_array<mln_site(I)>) p(par);
81  p_last = par[0] / output_ratio;
82  for_all(p)
83  {
84  tmp = p / output_ratio;
85  draw::line(ima, p_last, tmp, v);
86  p_last = tmp;
87  }
88  }
89 
90  template <typename I>
91  void polygon(Image<I>& ima,
92  const p_array<mln_site(I)>& par,
93  const mln_value(I)& v)
94  {
95  polygon(ima, par, v, 1);
96  }
97 
98 # endif // ! MLN_INCLUDE_ONLY
99 
100  } // end of namespace mln::draw
101 
102 } // end of namespace mln
103 
104 
105 #endif // ! MLN_DRAW_POLYGON_HH