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hyper_directional.hh
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26 
27 #ifndef MLN_CANVAS_BROWSING_HYPER_DIRECTIONAL_HH
28 # define MLN_CANVAS_BROWSING_HYPER_DIRECTIONAL_HH
29 
33 
34 # include <mln/core/concept/browsing.hh>
35 # include <mln/core/concept/image.hh>
36 
37 namespace mln
38 {
39 
40  namespace canvas
41  {
42 
43  namespace browsing
44  {
45 
47 
75  struct hyper_directional_t : public Browsing< hyper_directional_t >
76  {
77  // This default constructor is needed for compilation with gcc
78  // 4.6.0, gcc 4.6.1 and Clang.
80 
81  template <typename F>
82  void operator()(F& f) const;
83  };
84 
85  extern const hyper_directional_t hyper_directional;
86 
87 # ifndef MLN_INCLUDE_ONLY
88 
89 # ifndef MLN_WO_GLOBAL_VARS
90 
91  const hyper_directional_t hyper_directional;
92 
93 # endif // ! MLN_WO_GLOBAL_VARS
94 
95 
96  inline
97  hyper_directional_t::hyper_directional_t()
98  {
99  }
100 
101  template <typename F>
102  inline
103  void
104  hyper_directional_t::operator()(F& f) const
105  {
106  trace::entering("canvas::browsing::hyper_directional");
107  mln_precondition(f.dir < f.dim);
108  typedef typename F::I I;
109 
110  mln_psite(I)
111  pmin = f.input.domain().pmin(),
112  pmax = f.input.domain().pmax();
113 
114  f.p = pmin;
115 
116  f.init();
117 
118  do
119  {
120  f.next();
121 
122  for (int c = F::dim - 1; c >= 0; --c)
123  {
124  if (c == int(f.dir))
125  continue;
126  if (f.p[c] != pmax[c])
127  {
128  ++f.p[c];
129  break;
130  }
131  f.p[c] = pmin[c];
132  }
133  } while (f.p != pmin);
134 
135  f.final();
136  trace::exiting("canvas::browsing::hyper_directional");
137  }
138 
139 # endif // ! MLN_INCLUDE_ONLY
140 
141  } // end of namespace mln::canvas::browsing
142 
143  } // end of namespace mln::canvas
144 
145 } // end of namespace mln
146 
147 #endif // ! MLN_CANVAS_BROWSING_HYPER_DIRECTIONAL_HH