geometrygridpart/intersectioniterator.hh

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#ifndef DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_INTERSECTIONITERATOR_HH
#define DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_INTERSECTIONITERATOR_HH
 
#include <type_traits>
 
#include <dune/grid/common/intersectioniterator.hh>
 
#include <dune/fem/gridpart/geometrygridpart/intersection.hh>
 
namespace Dune
{
 
  namespace Fem
  {
 
    // GeometryGridPartIntersectionIterator
    // ------------------------------------
 
    template< class GridFamily >
    class GeometryGridPartIntersectionIterator
    {
      typedef GeometryGridPartIntersectionIterator< GridFamily > ThisType;
 
      typedef typename std::remove_const_t< GridFamily >::Traits Traits;
 
      typedef typename Traits::HostGridPartType::IntersectionIteratorType HostIntersectionIteratorType;
 
      typedef typename Traits::template Codim< 0 >::Entity Entity;
      typedef typename Traits::template Codim< 0 >::Geometry ElementGeometry;
 
      typedef typename Traits::GridFunctionType GridFunctionType;
 
      typedef GeometryGridPartIntersection< const GridFamily > IntersectionImplType;
 
    public:
      typedef Dune::Intersection< const GridFamily, IntersectionImplType > Intersection;
 
      GeometryGridPartIntersectionIterator () = default;
 
      GeometryGridPartIntersectionIterator ( const Entity &inside, const HostIntersectionIteratorType &hostIterator )
        : hostIterator_( hostIterator ), gridFunction_( &inside.impl().gridFunction() ), insideGeo_( inside.geometry().impl() )
      {}
 
      bool equals ( const ThisType &other ) const { return (hostIterator_ == other.hostIterator_); }
 
      void increment () { ++hostIterator_; }
 
      Intersection dereference () const { return IntersectionImplType( *gridFunction_, insideGeo_, *hostIterator_ ); }
 
    private:
      HostIntersectionIteratorType hostIterator_;
      const GridFunctionType *gridFunction_ = nullptr;
      typename ElementGeometry::Implementation insideGeo_;
    };
 
  } // namespace Fem
 
} // namespace Dune
 
#endif // #ifndef DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_INTERSECTIONITERATOR_HH