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nneighbor.hh
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25 
26 #ifndef MLN_FUN_X2V_NNEIGHBOR_HH
27 # define MLN_FUN_X2V_NNEIGHBOR_HH
28 
29 # include <mln/core/concept/function.hh>
30 # include <mln/fun/internal/selector.hh>
31 # include <mln/algebra/vec.hh>
32 # include <mln/convert/to.hh>
33 
39 namespace mln
40 {
41 
42  namespace fun
43  {
44 
45  namespace x2x
46  {
47 
48  template < typename I >
49  struct nneighbor
50  : public fun::internal::selector_<const algebra::vec<3,float>,
51  // 3,float is a dummy parameter (real is n,T)
52  mln_value(I), nneighbor<I> >::ret
53  {
54  typedef mln_value(I) result;
55 
56  nneighbor(const I& ima);
57 
58  template < unsigned n, typename T >
59  mln_value(I)
60  operator()(const algebra::vec<n,T>& x) const;
61 
62  const I& ima;
63  };
64 
65 
66 # ifndef MLN_INCLUDE_ONLY
67 
68  template < typename I >
69  nneighbor<I>::nneighbor(const I& ima) : ima(ima)
70  {
71  }
72 
73  template < typename I >
74  template < unsigned n, typename T >
75  mln_value(I)
76  nneighbor<I>::operator()(const algebra::vec<n,T>& x) const
77  {
78  mln_psite(I) p = convert::to<mln_psite(I)>(x);
79  return ima(p);
80  }
81 
82 
83 # endif // ! MLN_INCLUDE_ONLY
84 
85  } // end of namespace mln::fun::x2x
86 
87  } // end of namespace mln::fun
88 
89 } // end of namespace mln
90 
91 
92 #endif // ! MLN_FUN_X2V_NNEIGHBOR_HH