dune-localfunctions 2.9.0
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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// SPDX-FileCopyrightInfo: Copyright (C) DUNE Project contributors, see file LICENSE.md in module root
4// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
5#ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
6#define DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
7
8#include <cassert>
9#include <vector>
10
11#include <dune/common/fvector.hh>
12
13#include <dune/geometry/referenceelements.hh>
14
17
18namespace Dune
19{
20
28 template< class D, class R, unsigned int d >
30 {
32 R, 1, FieldVector< R, 1 >,
33 FieldMatrix< R, 1, d > > Traits;
34
35 public:
36 template< class F, class C >
37 void interpolate ( const F &ff, std::vector< C > &out ) const
38 {
39 typedef typename Traits::DomainType DomainType;
40
41 auto&& f = Impl::makeFunctionWithCallOperator<DomainType>(ff);
42
43 // get cubic reference element
44 auto referenceElement = ReferenceElements< D, d >::cube();
45
46 const int size = 2*d;
47 assert( size == referenceElement.size( 1 ) );
48
49 // resize vector
50 out.resize( size );
51
52 // evaluate local function in barycenter of codim 1 subentities
53 for( int i = 0; i < size; ++i )
54 {
55 const DomainType &x = referenceElement.position( i, 1 );
56 out[ i ] = f(x);
57 }
58 }
59
60 };
61
62} // namespace Dune
63
64#endif // #ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
Definition bdfmcube.hh:18
Type traits for LocalBasisVirtualInterface.
Definition common/localbasis.hh:34
D DomainType
domain type
Definition common/localbasis.hh:42
please doc me
Definition rannachertureklocalinterpolation.hh:30
void interpolate(const F &ff, std::vector< C > &out) const
Definition rannachertureklocalinterpolation.hh:37