interpolation.hh

#ifndef DUNE_FEM_SPACE_FINITEVOLUME_INTERPOLATION_HH
#define DUNE_FEM_SPACE_FINITEVOLUME_INTERPOLATION_HH
 
#include <functional>
 
#include <dune/fem/function/localfunction/average.hh>
 
#include "basisfunctionset.hh"
 
namespace Dune
{
 
  namespace Fem
  {
 
    // FiniteVolumeLocalInterpolation
    // ------------------------------
 
    template< class GridPart, class Range >
    class FiniteVolumeLocalInterpolation
    {
      typedef FiniteVolumeLocalInterpolation< GridPart, Range > ThisType;
 
    public:
      typedef GridPart GridPartType;
      typedef typename GridPartType::template Codim< 0 >::EntityType EntityType;
 
      typedef FiniteVolumeBasisFunctionSet< EntityType, Range > BasisFunctionSetType;
 
      FiniteVolumeLocalInterpolation () {}
 
      void bind( const EntityType &entity ) {}
      void unbind() {}
 
      explicit FiniteVolumeLocalInterpolation ( const EntityType &entity )
      { bind(entity); }
 
      FiniteVolumeLocalInterpolation ( const ThisType & ) = default;
 
      FiniteVolumeLocalInterpolation &operator= ( const ThisType & ) = default;
 
      /*
      BasisFunctionSetType basisFunctionSet () const
      {
        return BasisFunctionSetType( entity() );
      }
      */
 
      template< class LocalFunction, class LocalDofVector >
      void operator() ( const LocalFunction &localFunction, LocalDofVector &localDofVector ) const
      {
        apply( localFunction, localDofVector );
      }
 
      template< class LocalFunction, class LocalDofVector >
      void apply ( const LocalFunction &localFunction, LocalDofVector &localDofVector ) const
      {
        // use local functions range type here in case those differ
        typename LocalFunction::RangeType value;
        LocalAverage< LocalFunction, GridPartType >::apply( localFunction, value );
        for( int i = 0; i < Range::dimension; ++i )
          localDofVector[ i ] = value[ i ];
      }
 
    private:
      //const EntityType &entity () const { return entity_.get(); }
 
      //std::reference_wrapper< const EntityType > entity_;
    };
 
  } // namespace Fem
 
} // namespace Dune
 
#endif // #ifndef DUNE_FEM_SPACE_FINITEVOLUME_INTERPOLATION_HH