/usr/include/dune/localfunctions/rannacherturek/rannachertureklocalinterpolation.hh is in libdune-localfunctions-dev 2.5.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
#define DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
#include <cassert>
#include <vector>
#include <dune/common/fvector.hh>
#include <dune/geometry/referenceelements.hh>
#include <dune/localfunctions/common/localbasis.hh>
namespace Dune
{
/**
\brief please doc me
\tparam D type to represent the field in the domain.
\tparam R type to represent the field in the range.
\tparam d domain dimension
*/
template< class D, class R, unsigned int d >
class RannacherTurekLocalInterpolation
{
typedef LocalBasisTraits< D, d, FieldVector< D, d >,
R, 1, FieldVector< R, 1 >,
FieldMatrix< R, 1, d > > Traits;
public:
template< class F, class C >
void interpolate ( const F &f, std::vector< C > &out ) const
{
typedef typename Traits::DomainType DomainType;
typedef typename Traits::RangeType RangeType;
// get cubic reference element
const ReferenceElement< D, d > &referenceElement = ReferenceElements< D, d >::cube();
const int size = 2*d;
assert( size == referenceElement.size( 1 ) );
// resize vector
out.resize( size );
// evaluate local function in barycenter of codim 1 subentities
for( int i = 0; i < size; ++i )
{
const DomainType &x = referenceElement.position( i, 1 );
RangeType y;
f.evaluate( x, y );
out[ i ] = y;
}
}
};
} // namespace Dune
#endif // #ifndef DUNE_RANNACHER_TUREK_LOCALINTERPOLATION_HH
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