dune-localfunctions  2.8.0
rannachertureklocalinterpolation.hh
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1 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 // vi: set et ts=4 sw=2 sts=2:
3 #ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
4 #define DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
5 
6 #include <cassert>
7 #include <vector>
8 
9 #include <dune/common/fvector.hh>
10 
11 #include <dune/geometry/referenceelements.hh>
12 
15 
16 namespace Dune
17 {
18 
26  template< class D, class R, unsigned int d >
28  {
30  R, 1, FieldVector< R, 1 >,
31  FieldMatrix< R, 1, d > > Traits;
32 
33  public:
34  template< class F, class C >
35  void interpolate ( const F &ff, std::vector< C > &out ) const
36  {
37  typedef typename Traits::DomainType DomainType;
38 
39  auto&& f = Impl::makeFunctionWithCallOperator<DomainType>(ff);
40 
41  // get cubic reference element
42  auto referenceElement = ReferenceElements< D, d >::cube();
43 
44  const int size = 2*d;
45  assert( size == referenceElement.size( 1 ) );
46 
47  // resize vector
48  out.resize( size );
49 
50  // evaluate local function in barycenter of codim 1 subentities
51  for( int i = 0; i < size; ++i )
52  {
53  const DomainType &x = referenceElement.position( i, 1 );
54  out[ i ] = f(x);
55  }
56  }
57 
58  };
59 
60 } // namespace Dune
61 
62 #endif // #ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
Definition: bdfmcube.hh:16
Type traits for LocalBasisVirtualInterface.
Definition: common/localbasis.hh:32
D DomainType
domain type
Definition: common/localbasis.hh:43
please doc me
Definition: rannachertureklocalinterpolation.hh:28
void interpolate(const F &ff, std::vector< C > &out) const
Definition: rannachertureklocalinterpolation.hh:35