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p2p/translation.hh
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25 
26 #ifndef MLN_FUN_P2P_TRANSLATION_HH
27 # define MLN_FUN_P2P_TRANSLATION_HH
28 
32 
33 # include <mln/core/concept/function.hh>
34 # include <mln/core/concept/gdpoint.hh>
35 
36 
37 namespace mln
38 {
39 
40  namespace fun
41  {
42 
43  namespace p2p
44  {
45 
46  template <typename P>
47  struct translation_t : public Function_v2v< translation_t<P> >
48  {
49  typedef P result;
50  typedef P argument;
51 
52  translation_t(const mln_delta(P)& dp);
53 
54  P operator()(const P& p) const;
55  P inverse(const P& p) const;
56 
57  protected:
58  mln_delta(P) dp_;
59  };
60 
61 
62  template <typename D>
63  translation_t<mln_site(D)>
64  translation(const Gdpoint<D>& dp);
65 
66 
67 
68 # ifndef MLN_INCLUDE_ONLY
69 
70  template <typename P>
71  inline
72  translation_t<P>::translation_t(const mln_delta(P)& dp)
73  : dp_(dp)
74  {
75  }
76 
77  template <typename P>
78  inline
79  P
80  translation_t<P>::operator()(const P& p) const
81  {
82  return p + dp_;
83  }
84 
85  template <typename P>
86  inline
87  P
88  translation_t<P>::inverse(const P& p) const
89  {
90  return p - dp_;
91  }
92 
93 
94  template <typename D>
95  inline
96  translation_t<mln_site(D)>
97  translation(const Gdpoint<D>& dp)
98  {
99  translation_t<mln_site(D)> tmp(exact(dp));
100  return tmp;
101  }
102 
103 
104 # endif // ! MLN_INCLUDE_ONLY
105 
106  } // end of namespace mln::fun::p2p
107 
108  } // end of namespace mln::fun
109 
110 } // end of namespace mln
111 
112 
113 #endif // ! MLN_FUN_P2P_TRANSLATION_HH