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diag2d.hh
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25 
26 #ifndef MLN_WIN_DIAG2D_HH
27 # define MLN_WIN_DIAG2D_HH
28 
32 
33 # include <mln/core/internal/classical_window_base.hh>
34 # include <mln/core/alias/dpoint2d.hh>
35 
36 
37 namespace mln
38 {
39 
41 
42 
43  namespace win
44  {
45 
63  struct diag2d : public internal::classical_window_base< dpoint2d, diag2d >
64  {
71  diag2d(unsigned length);
72 
75  unsigned length() const;
76 
80  unsigned delta_() const;
81 
82  void print_(std::ostream& ostr) const;
83 
84  protected:
85  unsigned length_;
86  };
87 
88 
89 
90 # ifndef MLN_INCLUDE_ONLY
91 
92  inline
93  diag2d::diag2d(unsigned length)
94  : length_(length)
95  {
96  mln_precondition(length % 2 == 1);
97  const def::coord
98  dcol = static_cast<def::coord>(length) / 2,
99  minus_dcol = static_cast<def::coord>(-dcol);
100  for (def::coord col = minus_dcol; col <= dcol; ++col)
101  insert(dpoint2d(static_cast<def::coord>(-col),
102  col));
103  }
104 
105  inline
106  unsigned diag2d::length() const
107  {
108  return length_;
109  }
110 
111  inline
112  unsigned diag2d::delta_() const
113  {
114  return length_ / 2;
115  }
116 
117  inline
118  void diag2d::print_(std::ostream& ostr) const
119  {
120  ostr << "[diag 2d: length=" << length_ << ']';
121  }
122 
123 # endif // ! MLN_INCLUDE_ONLY
124 
125  } // end of namespace mln::win
126 
127 } // end of namespace mln
128 
129 
130 
131 #endif // ! MLN_WIN_DIAG2D_HH