geometrygridpart.hh

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#ifndef DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_HH
#define DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_HH
 
#include <cassert>
 
#include <dune/common/version.hh>
 
#include <dune/fem/function/localfunction/const.hh>
 
#include <dune/fem/gridpart/common/deaditerator.hh>
#include <dune/fem/gridpart/common/entitysearch.hh>
#include <dune/fem/gridpart/common/extendedentity.hh>
#include <dune/fem/gridpart/common/gridpart.hh>
#include <dune/fem/gridpart/common/metatwistutility.hh>
#include <dune/fem/gridpart/idgridpart/indexset.hh>
#include <dune/fem/gridpart/idgridpart/iterator.hh>
 
#include <dune/fem/gridpart/common/compositegeometry.hh>
#include <dune/fem/gridpart/common/localfunctiongeometry.hh>
#include <dune/fem/gridpart/common/sharedgeometry.hh>
#include <dune/fem/gridpart/geometrygridpart/capabilities.hh>
#include <dune/fem/gridpart/geometrygridpart/entity.hh>
#include <dune/fem/gridpart/geometrygridpart/datahandle.hh>
#include <dune/fem/gridpart/geometrygridpart/intersection.hh>
#include <dune/fem/gridpart/geometrygridpart/intersectioniterator.hh>
 
namespace Dune
{
 
  namespace Fem
  {
 
    // Internal Forward Declarations
    // -----------------------------
 
    template< class GridFunctionType >
    class GeometryGridPart;
 
 
 
    // GeometryGridPartData
    // --------------------
 
    template< class GridFunction >
    struct GeometryGridPartData
    {
      typedef GridFunction GridFunctionType;
 
      GeometryGridPartData () noexcept = default;
      GeometryGridPartData ( const GridFunctionType &gridFunction ) noexcept : gridFunction_( &gridFunction ) {}
 
      operator const GridFunctionType & () const { assert( gridFunction_ ); return *gridFunction_; }
 
    private:
      const GridFunctionType *gridFunction_ = nullptr;
    };
 
 
 
    // GeometryGridPartFamily
    // ----------------------
 
    template< class GridFunction >
    struct GeometryGridPartFamily
    {
      typedef GridFunction GridFunctionType;
      typedef typename GridFunction::RangeFieldType ctype;
 
      constexpr static int dimension = GridFunction::GridPartType::dimension;
      constexpr static int dimensionworld = GridFunction::FunctionSpaceType::dimRange;
 
      typedef GeometryGridPartFamily< GridFunction > GridPartFamily;
 
      struct Traits
      {
        typedef GeometryGridPartData< GridFunction > ExtraData;
        typedef GridFunction GridFunctionType;
        typedef typename GridFunctionType::GridPartType HostGridPartType;
 
        typedef SharedGeometry< LocalFunctionGeometry< ConstLocalFunction<GridFunction> > > ElementGeometryImpl;
 
        template< int codim >
        struct Codim
        {
          typedef typename HostGridPartType::template Codim< codim >::LocalGeometryType LocalGeometry;
 
          template< int mydim, int cdim, class Grid >
          using GeometryImpl = std::conditional_t< mydim == dimension, ElementGeometryImpl, CompositeGeometry< ElementGeometryImpl, LocalGeometry > >;
 
          typedef Dune::Geometry< dimension - codim, dimensionworld, const GridPartFamily, GeometryImpl > Geometry;
 
          typedef Dune::ExtendedEntity< codim, dimension, const GridPartFamily, GeometryGridPartEntity > Entity;
          typedef typename HostGridPartType::GridType::template Codim< codim >::EntitySeed EntitySeed;
        };
 
        typedef DeadIntersection< const GridPartFamily > IntersectionImplType;
        typedef DeadIntersectionIterator< const GridPartFamily > IntersectionIteratorImplType;
 
        typedef Dune::Intersection< const GridPartFamily, IntersectionImplType > LeafIntersection;
        typedef Dune::Intersection< const GridPartFamily, IntersectionImplType > LevelIntersection;
 
        typedef Dune::IntersectionIterator< const GridPartFamily, IntersectionIteratorImplType, IntersectionImplType > LeafIntersectionIterator;
        typedef Dune::IntersectionIterator< const GridPartFamily, IntersectionIteratorImplType, IntersectionImplType > LevelIntersectionIterator;
 
        typedef Dune::EntityIterator< 0, const GridPartFamily, DeadIterator< typename Codim< 0 >::Entity > > HierarchicIterator;
      };
 
      template< int codim >
      struct Codim
        : public Traits::template Codim< codim >
      {};
 
      typedef typename Traits::LeafIntersectionIterator LeafIntersectionIterator;
      typedef typename Traits::LevelIntersectionIterator LevelIntersectionIterator;
 
      typedef typename Traits::HierarchicIterator HierarchicIterator;
    };
 
 
 
    // GeometryGridPartTraits
    // ----------------------
 
    template< class GridFunction >
    struct GeometryGridPartTraits
    {
      typedef GridFunction GridFunctionType;
      typedef typename GridFunction::GridPartType HostGridPartType;
      typedef GeometryGridPart< GridFunction > GridPartType;
      typedef GeometryGridPartFamily< GridFunction > GridPartFamily;
      typedef GeometryGridPartFamily< GridFunction > GridFamily;
 
      typedef GridPartType GridViewType;
 
      constexpr static int dimension = GridFunction::GridPartType::dimension;
      constexpr static int dimensionworld = GridFunction::FunctionSpaceType::dimRange;
 
      typedef MetaTwistUtility< typename HostGridPartType::TwistUtilityType >  TwistUtilityType;
 
      typedef IdIndexSet< const GridPartFamily > IndexSetType;
 
      typedef typename HostGridPartType::GridType GridType;
 
      static const PartitionIteratorType indexSetPartitionType = HostGridPartType::indexSetPartitionType;
      static const InterfaceType indexSetInterfaceType = HostGridPartType::indexSetInterfaceType;
 
      typedef GeometryGridPartIntersectionIterator< const GridFamily > IntersectionIteratorImplType;
      typedef GeometryGridPartIntersection< const GridFamily > IntersectionImplType;
      typedef IntersectionIterator< const GridFamily, IntersectionIteratorImplType, IntersectionImplType > IntersectionIteratorType;
 
      template< int codim >
      struct Codim : public GridFamily::Traits::template Codim< codim >
      {
        typedef typename GridFamily::Traits::template Codim< codim > BaseType;
 
        typedef typename BaseType::Geometry       GeometryType;
        typedef typename BaseType::LocalGeometry  LocalGeometryType;
 
        typedef typename BaseType::Entity         EntityType;
        typedef typename BaseType::EntitySeed     EntitySeedType;
 
        template< PartitionIteratorType pitype >
        struct Partition
        {
          typedef EntityIterator< codim, const GridFamily, IdIterator< codim, pitype, const GridFamily > > IteratorType;
          typedef IteratorType Iterator;
        };
      };
 
      typedef typename HostGridPartType::CommunicationType CommunicationType;
      typedef CommunicationType Communication;
      static const bool conforming = HostGridPartType::Traits::conforming;
    };
 
 
 
    // GeometryGridPart
    // ----------------
 
    template< class GridFunction >
    class GeometryGridPart
      : public GridPartDefault< GeometryGridPartTraits< GridFunction > >
    {
    public:
      typedef GridFunction GridFunctionType;
 
    private:
      typedef GeometryGridPart< GridFunctionType > ThisType;
      typedef GridPartDefault< GeometryGridPartTraits< GridFunctionType > > BaseType;
      typedef typename GeometryGridPartTraits< GridFunctionType >::GridFamily GridFamily;
 
    public:
      typedef typename GridFunctionType::GridPartType HostGridPartType;
      typedef typename BaseType::GridType GridType;
      typedef typename BaseType::Grid     Grid;
      typedef typename BaseType::IndexSetType IndexSetType;
      typedef typename BaseType::IndexSet     IndexSet;
      typedef typename BaseType::IntersectionIteratorType IntersectionIteratorType;
      typedef typename BaseType::IntersectionIterator     IntersectionIterator;
      typedef typename BaseType::IntersectionType IntersectionType;
      typedef typename BaseType::Intersection Intersection;
      typedef typename BaseType::CommunicationType CommunicationType;
      typedef typename BaseType::Communication     Communication;
      typedef typename BaseType::GridViewType GridViewType;
 
      // the interface takes this from the grid
      constexpr static int dimensionworld = GridFunction::FunctionSpaceType::dimRange;
 
      template< int codim >
      struct Codim
        : public BaseType::template Codim< codim >
      {};
 
      explicit GeometryGridPart ( const GridFunctionType &gridFunction )
        : BaseType( const_cast< GridType& > (gridFunction.gridPart().grid()) ),
          gridFunction_( &gridFunction ),
          indexSet_( hostGridPart().indexSet() )
      {}
 
      const IndexSetType &indexSet () const
      {
        return indexSet_;
      }
 
      template< int codim >
      typename Codim< codim >::IteratorType
      begin () const
      {
        return begin< codim, InteriorBorder_Partition >();
      }
 
      template< int codim, PartitionIteratorType pitype >
      typename Codim< codim >::template Partition< pitype >::IteratorType
      begin () const
      {
        return IdIterator< codim, pitype, const GridFamily >( gridFunction(), hostGridPart().template begin< codim, pitype >() );
      }
 
      template< int codim >
      typename Codim< codim >::IteratorType
      end () const
      {
        return end< codim, InteriorBorder_Partition >();
      }
 
      template< int codim, PartitionIteratorType pitype >
      typename Codim< codim >::template Partition< pitype >::IteratorType
      end () const
      {
        return IdIterator< codim, pitype, const GridFamily >( gridFunction(), hostGridPart().template end< codim, pitype >() );
      }
 
      int level () const
      {
        return hostGridPart().level();
      }
 
      IntersectionIteratorType ibegin ( const typename Codim< 0 >::EntityType &entity ) const
      {
        return GeometryGridPartIntersectionIterator< const GridFamily >( entity, hostGridPart().ibegin( entity.impl().hostEntity() ) );
      }
 
      IntersectionIteratorType iend ( const typename Codim< 0 >::EntityType &entity ) const
      {
        return GeometryGridPartIntersectionIterator< const GridFamily >( entity, hostGridPart().iend( entity.impl().hostEntity() ) );
      }
 
      template< class DataHandle, class Data >
      void communicate ( CommDataHandleIF< DataHandle, Data > &handle,
                         InterfaceType iftype, CommunicationDirection dir ) const
      {
        typedef CommDataHandleIF< DataHandle, Data >  HostHandleType;
        GeometryGridPartDataHandle< GridFamily, HostHandleType > handleWrapper( handle, gridFunction() );
        hostGridPart().communicate( handleWrapper, iftype, dir );
      }
 
      // convert a grid entity to a grid part entity ("Gurke!")
      template< class Entity >
      MakeableInterfaceObject< typename Codim< Entity::codimension >::EntityType >
      convert ( const Entity &entity ) const
      {
        // make sure we have a grid entity
        const auto& gridEntity = Fem::gridEntity( entity );
 
        // create a grid part entity from a given grid entity
        typedef typename Codim< Entity::codimension >::EntityType EntityType;
        typedef typename EntityType::Implementation Implementation;
        typedef MakeableInterfaceObject< EntityType > EntityObj;
        // here, grid part information can be passed, if necessary
        return EntityObj( Implementation( gridFunction(), hostGridPart().convert( gridEntity ) ) );
      }
      template < class EntitySeed >
      typename Codim< EntitySeed::codimension >::EntityType
      entity ( const EntitySeed &seed ) const
      {
        return convert( hostGridPart().entity(seed) );
      }
 
      const HostGridPartType &hostGridPart () const
      {
        return gridFunction().gridPart();
      }
 
      const GridFunctionType& gridFunction() const
      {
        assert( gridFunction_ );
        return *gridFunction_;
      }
 
    protected:
      const GridFunctionType *gridFunction_;
      IndexSetType indexSet_;
    };
 
 
 
    // GridEntityAccess for GeometryGridPartEntity
    // -------------------------------------------
 
    template< int codim, int dim, class GridFamily >
    struct GridEntityAccess< Dune::ExtendedEntity< codim, dim, GridFamily, GeometryGridPartEntity > >
    {
      typedef Dune::ExtendedEntity< codim, dim, GridFamily, GeometryGridPartEntity > EntityType;
      typedef GridEntityAccess< typename EntityType::Implementation::HostEntityType > HostAccessType;
      typedef typename HostAccessType::GridEntityType GridEntityType;
 
      static const GridEntityType &gridEntity ( const EntityType &entity )
      {
        return HostAccessType::gridEntity( entity.impl().hostEntity() );
      }
    };
 
 
 
    // EntitySearch for GeometryGridPart
    // ---------------------------------
 
    template< class GridFunction, int codim, PartitionIteratorType partition >
    class EntitySearch< GeometryGridPart< GridFunction >, codim, partition >
      : public DefaultEntitySearch< GeometryGridPart< GridFunction >, codim, partition >
    {
      typedef EntitySearch< GeometryGridPart< GridFunction >, codim, partition > ThisType;
      typedef DefaultEntitySearch< GeometryGridPart< GridFunction >, codim, partition > BaseType;
 
    public:
      typedef typename BaseType::GridPartType GridPartType;
 
      explicit EntitySearch ( const GridPartType &gridPart )
        : BaseType( gridPart )
      {}
    };
 
  } // namespace Fem
 
} // namespace Dune
 
#endif // #ifndef DUNE_FEM_GRIDPART_GEOMETRYGRIDPART_HH