gridfunctionadapter.hh

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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_PDELAB_GRIDFUNCTIONSPACE_GRIDFUNCTIONADAPTER_HH
#define DUNE_PDELAB_GRIDFUNCTIONSPACE_GRIDFUNCTIONADAPTER_HH
 
#include <dune/pdelab/common/function.hh>
 
namespace Dune {
  namespace PDELab {
 
    template<typename T1, typename T2>
    class DifferenceAdapter
      : public Dune::PDELab::GridFunctionBase<
      Dune::PDELab::GridFunctionTraits<typename T1::Traits::GridViewType,
                                       typename T1::Traits::RangeFieldType,
                                       1,
                                       Dune::FieldVector<typename T1::Traits::RangeFieldType,1> >,
      DifferenceAdapter<T1,T2> >
    {
    public:
      typedef Dune::PDELab::GridFunctionTraits<typename T1::Traits::GridViewType,
                                               typename T1::Traits::RangeFieldType,
                                               1,Dune::FieldVector<typename T1::Traits::RangeFieldType,1> > Traits;
 
      DifferenceAdapter (const T1& t1_, const T2& t2_) : t1(t1_), t2(t2_) {}
 
      inline void evaluate (const typename Traits::ElementType& e,
                            const typename Traits::DomainType& x,
                            typename Traits::RangeType& y) const
      {
        typename Traits::RangeType y1;
        t1.evaluate(e,x,y1);
        typename Traits::RangeType y2;
        t2.evaluate(e,x,y2);
        y1 -= y2;
        y = y1;
      }
 
      inline const typename Traits::GridViewType& getGridView () const
      {
        return t1.getGridView();
      }
 
    private:
      const T1& t1;
      const T2& t2;
    };
 
 
    template<typename T1, typename T2>
    class DifferenceSquaredAdapter
      : public Dune::PDELab::GridFunctionBase<
      Dune::PDELab::GridFunctionTraits<typename T1::Traits::GridViewType,
                                       typename T1::Traits::RangeFieldType,
                                       1,
                                       Dune::FieldVector<typename T1::Traits::RangeFieldType,1> >,
      DifferenceSquaredAdapter<T1,T2> >
    {
    public:
      typedef Dune::PDELab::GridFunctionTraits<typename T1::Traits::GridViewType,
                                               typename T1::Traits::RangeFieldType,
                                               1,Dune::FieldVector<typename T1::Traits::RangeFieldType,1> > Traits;
 
      DifferenceSquaredAdapter (const T1& t1_, const T2& t2_) : t1(t1_), t2(t2_) {}
 
      inline void evaluate (const typename Traits::ElementType& e,
                            const typename Traits::DomainType& x,
                            typename Traits::RangeType& y) const
      {
        typename T1::Traits::RangeType y1;
        t1.evaluate(e,x,y1);
        typename T2::Traits::RangeType y2;
        t2.evaluate(e,x,y2);
        y1 -= y2;
        y = y1.two_norm2();
      }
 
      inline const typename Traits::GridViewType& getGridView () const
      {
        return t1.getGridView();
      }
 
    private:
      const T1& t1;
      const T2& t2;
    };
 
  }
}
#endif