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w_window_directional.hh
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25 
26 #ifndef MLN_MAKE_W_WINDOW_DIRECTIONAL_HH
27 # define MLN_MAKE_W_WINDOW_DIRECTIONAL_HH
28 
32 
33 # include <mln/core/w_window.hh>
34 # include <mln/core/concept/gdpoint.hh>
35 # include <mln/literal/zero.hh>
36 
37 
38 namespace mln
39 {
40 
41  namespace make
42  {
43 
51  template <typename D, typename W, unsigned L>
53  w_window_directional(const Gdpoint<D>& dp, W (&weights)[L]);
54 
55 
56 # ifndef MLN_INCLUDE_ONLY
57 
58  template <typename D, typename W, unsigned L>
59  inline
61  w_window_directional(const Gdpoint<D>& dp_, W (&weights)[L])
62  {
63  mlc_bool(L % 2 == 1)::check();
64  int half = L / 2;
65 
66  const D& dp = exact(dp_);
67  D zero = literal::zero;
68  mln_precondition(dp != zero);
69 
70  mln::w_window<D,W> w_win;
71  for (int i = - half; i <= half; ++i)
72  if (weights[half + i] != 0)
73  w_win.insert(weights[half + i], zero + dp * i);
74  return w_win;
75  }
76 
77 # endif // ! MLN_INCLUDE_ONLY
78 
79  } // end of namespace mln::make
80 
81 } // end of namespace mln
82 
83 
84 #endif // ! MLN_MAKE_W_WINDOW_DIRECTIONAL_HH