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polygon.hh
1 // Copyright (C) 2011, 2012 EPITA Research and Development Laboratory
2 // (LRDE)
3 //
4 // This file is part of Olena.
5 //
6 // Olena is free software: you can redistribute it and/or modify it under
7 // the terms of the GNU General Public License as published by the Free
8 // Software Foundation, version 2 of the License.
9 //
10 // Olena is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
17 //
18 // As a special exception, you may use this file as part of a free
19 // software project without restriction. Specifically, if other files
20 // instantiate templates or use macros or inpolygon functions from this
21 // file, or you compile this file and link it with other files to produce
22 // an executable, this file does not by itself cause the resulting
23 // executable to be covered by the GNU General Public License. This
24 // exception does not however invalidate any other reasons why the
25 // executable file might be covered by the GNU General Public License.
26 
27 #ifndef MLN_DRAW_POLYGON_HH
28 # define MLN_DRAW_POLYGON_HH
29 
35 
36 # include <mln/core/concept/image.hh>
37 # include <mln/core/site_set/p_array.hh>
38 # include <mln/draw/line.hh>
39 
40 
41 namespace mln
42 {
43 
44  namespace draw
45  {
46 
58  template <typename I>
59  void polygon(Image<I>& ima,
60  const p_array<mln_site(I)>& par,
61  const mln_value(I)& v,
62  unsigned output_ratio);
63 
68  template <typename I>
69  void polygon(Image<I>& ima,
70  const p_array<mln_site(I)>& par,
71  const mln_value(I)& v);
72 
73 
74 # ifndef MLN_INCLUDE_ONLY
75 
76  template <typename I>
77  void polygon(Image<I>& ima_,
78  const p_array<mln_site(I)>& par,
79  const mln_value(I)& v,
80  unsigned output_ratio)
81  {
82  I& ima = exact(ima_);
83  mln_precondition(ima.is_valid());
84  mln_precondition(par.nelements() > 1);
85 
86  mln_site(I) p_last, tmp;
87  mln_piter(p_array<mln_site(I)>) p(par);
88  p_last = par[0] / output_ratio;
89  for_all(p)
90  {
91  tmp = p / output_ratio;
92  draw::line(ima, p_last, tmp, v);
93  p_last = tmp;
94  }
95  }
96 
97  template <typename I>
98  void polygon(Image<I>& ima,
99  const p_array<mln_site(I)>& par,
100  const mln_value(I)& v)
101  {
102  polygon(ima, par, v, 1);
103  }
104 
105 # endif // ! MLN_INCLUDE_ONLY
106 
107  } // end of namespace mln::draw
108 
109 } // end of namespace mln
110 
111 
112 #endif // ! MLN_DRAW_POLYGON_HH