/usr/include/dune/pdelab/finiteelementmap/rt1simplex2dfem.hh is in libdune-pdelab-dev 2.0.0-1.
This file is owned by root:root, with mode 0o644.
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#ifndef DUNE_PDELAB_FINITEELEMENTMAP_RT1SIMPLEX2DFEM_HH
#define DUNE_PDELAB_FINITEELEMENTMAP_RT1SIMPLEX2DFEM_HH
#include <vector>
#include <dune/localfunctions/raviartthomas/raviartthomas12d.hh>
#include "finiteelementmap.hh"
namespace Dune {
namespace PDELab {
//! wrap up element from local functions
//! \ingroup FiniteElementMap
template<typename GV, typename D, typename R>
class RT1Simplex2DLocalFiniteElementMap :
public LocalFiniteElementMapInterface<
LocalFiniteElementMapTraits< Dune::RT12DLocalFiniteElement<D,R> >,
RT1Simplex2DLocalFiniteElementMap<GV,D,R> >
{
typedef Dune::RT12DLocalFiniteElement<D,R> FE;
typedef typename GV::IndexSet IndexSet;
public:
//! \brief export type of the signature
typedef LocalFiniteElementMapTraits<FE> Traits;
//! \brief Use when Imp has a standard constructor
RT1Simplex2DLocalFiniteElementMap(const GV& gv_)
: gv(gv_), is(gv_.indexSet()), orient(gv_.size(0))
{
// create all variants
for (int i = 0; i < 8; i++)
{
variant[i] = FE(i);
}
// compute orientation for all elements
typedef typename GV::Traits::template Codim<0>::Iterator ElementIterator;
typedef typename GV::IntersectionIterator IntersectionIterator;
// loop once over the grid
for (ElementIterator it = gv.template begin<0>(); it != gv.template end<0>(); ++it)
{
unsigned int myId = is.template index<0>(*it);
orient[myId] = 0;
IntersectionIterator endit = gv.iend(*it);
for (IntersectionIterator iit = gv.ibegin(*it); iit != endit; ++iit)
{
if (iit->neighbor()
&& is.template index<0>(*(iit->outside())) > myId)
{
orient[myId] |= 1 << iit->indexInInside();
}
}
}
}
//! \brief get local basis functions for entity
template<class EntityType>
const typename Traits::FiniteElementType& find(const EntityType& e) const
{
return variant[orient[is.template index<0>(e)]];
}
bool fixedSize() const
{
return true;
}
std::size_t size(GeometryType gt) const
{
switch (gt.dim())
{
case 2:
return 2;
case 1:
return 2;
default:
return 0;
}
}
std::size_t maxLocalSize() const
{
return 8;
}
private:
GV gv;
FE variant[8];
const IndexSet& is;
std::vector<unsigned char> orient;
};
} // end namespace PDELab
} // end namespace Dune
#endif // DUNE_PDELAB_FINITEELEMENTMAP_RT1SIMPLEX2DFEM_HH
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