00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026 #ifndef MLN_WIN_BACKDIAG2D_HH
00027 # define MLN_WIN_BACKDIAG2D_HH
00028
00032
00033 # include <mln/core/internal/classical_window_base.hh>
00034 # include <mln/core/alias/dpoint2d.hh>
00035
00036
00037 namespace mln
00038 {
00039
00040 mln_internal_add_classical_window_trait(backdiag2d);
00041
00042
00043 namespace win
00044 {
00045
00063 struct backdiag2d : public internal::classical_window_base< dpoint2d, backdiag2d >
00064 {
00071 backdiag2d(unsigned length);
00072
00075 unsigned length() const;
00076
00080 unsigned delta_() const;
00081
00082 void print_(std::ostream& ostr) const;
00083
00084 protected:
00085 unsigned length_;
00086 };
00087
00088
00089
00090 # ifndef MLN_INCLUDE_ONLY
00091
00092 inline
00093 backdiag2d::backdiag2d(unsigned length)
00094 : length_(length)
00095 {
00096 mln_precondition(length % 2 == 1);
00097 const def::coord
00098 dcol = static_cast<def::coord>(length / 2),
00099 minus_dcol = static_cast<def::coord>(- dcol);
00100 for (def::coord col = minus_dcol; col <= dcol; ++col)
00101 insert(dpoint2d(col, col));
00102 }
00103
00104 inline
00105 unsigned backdiag2d::length() const
00106 {
00107 return length_;
00108 }
00109
00110 inline
00111 unsigned backdiag2d::delta_() const
00112 {
00113 return length_ / 2;
00114 }
00115
00116 inline
00117 void backdiag2d::print_(std::ostream& ostr) const
00118 {
00119 ostr << "[backdiag 2d: length=" << length_ << ']';
00120 }
00121
00122 # endif // ! MLN_INCLUDE_ONLY
00123
00124 }
00125
00126 }
00127
00128
00129
00130 #endif // ! MLN_WIN_BACKDIAG2D_HH