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// SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GEOGRID_INTERSECTION_HH
#define DUNE_GEOGRID_INTERSECTION_HH
#include <dune/grid/geometrygrid/declaration.hh>
#include <dune/grid/geometrygrid/cornerstorage.hh>
namespace Dune
{
namespace GeoGrid
{
// Intersection
// ------------
template< class Grid, class HostIntersection >
class Intersection
{
typedef typename HostIntersection::Geometry HostGeometry;
typedef typename HostIntersection::LocalGeometry HostLocalGeometry;
typedef typename std::remove_const< Grid >::type::Traits Traits;
public:
typedef typename Traits::ctype ctype;
static const int dimension = Traits::dimension;
static const int dimensionworld = Traits::dimensionworld;
typedef typename Traits::template Codim< 0 >::Entity Entity;
typedef typename Traits::template Codim< 1 >::Geometry Geometry;
typedef typename Traits::template Codim< 1 >::LocalGeometry LocalGeometry;
typedef typename Traits::template Codim< 0 >::Geometry ElementGeometry;
private:
typedef GeoGrid::IntersectionCoordVector< Grid > CoordVector;
typedef typename Traits::template Codim< 0 >::EntityImpl EntityImpl;
typedef typename Traits::template Codim< 1 >::GeometryImpl GeometryImpl;
typedef typename Traits::template Codim< 0 >::GeometryImpl ElementGeometryImpl;
public:
Intersection()
{}
explicit Intersection ( const HostIntersection &hostIntersection, const ElementGeometryImpl &insideGeo )
: hostIntersection_( hostIntersection )
, insideGeo_ ( insideGeo )
, geo_( grid() )
{}
explicit Intersection ( HostIntersection&& hostIntersection, const ElementGeometryImpl &insideGeo )
: hostIntersection_( std::move( hostIntersection ) )
, insideGeo_ ( insideGeo )
, geo_( grid() )
{}
bool equals ( const Intersection &other) const
{
return hostIntersection_ == other.hostIntersection_;
}
explicit operator bool () const { return bool( hostIntersection_ ); }
Entity inside () const
{
return EntityImpl( insideGeo_, hostIntersection().inside() );
}
Entity outside () const
{
return EntityImpl( grid(), hostIntersection().outside() );
}
bool boundary () const { return hostIntersection().boundary(); }
bool conforming () const { return hostIntersection().conforming(); }
bool neighbor () const { return hostIntersection().neighbor(); }
size_t boundarySegmentIndex () const
{
return hostIntersection().boundarySegmentIndex();
}
LocalGeometry geometryInInside () const
{
return hostIntersection().geometryInInside();
}
LocalGeometry geometryInOutside () const
{
return hostIntersection().geometryInOutside();
}
Geometry geometry () const
{
if( !geo_ )
{
CoordVector coords( insideGeo_, geometryInInside() );
geo_ = GeometryImpl( grid(), type(), coords );
}
return Geometry( geo_ );
}
GeometryType type () const { return hostIntersection().type(); }
int indexInInside () const
{
return hostIntersection().indexInInside();
}
int indexInOutside () const
{
return hostIntersection().indexInOutside();
}
FieldVector< ctype, dimensionworld >
integrationOuterNormal ( const FieldVector< ctype, dimension-1 > &local ) const
{
const LocalGeometry geoInInside = geometryInInside();
const int idxInInside = indexInInside();
auto refElement = referenceElement< ctype, dimension >( insideGeo_.type() );
FieldVector< ctype, dimension > x( geoInInside.global( local ) );
const typename ElementGeometryImpl::JacobianInverseTransposed &jit = insideGeo_.jacobianInverseTransposed( x );
FieldVector< ctype, dimension > refNormal = refElement.integrationOuterNormal( idxInInside );
FieldVector< ctype, dimensionworld > normal;
jit.mv( refNormal, normal );
if( !conforming() )
normal *= geoInInside.volume() / refElement.template geometry< 1 >( idxInInside ).volume();
normal *= jit.detInv();
//normal *= insideGeo_.integrationElement( x );
return normal;
}
FieldVector< ctype, dimensionworld >
outerNormal ( const FieldVector< ctype, dimension-1 > &local ) const
{
auto refElement = referenceElement< ctype, dimension >( insideGeo_.type() );
FieldVector< ctype, dimension > x( geometryInInside().global( local ) );
const typename ElementGeometryImpl::JacobianInverseTransposed &jit = insideGeo_.jacobianInverseTransposed( x );
FieldVector< ctype, dimension > refNormal = refElement.integrationOuterNormal( indexInInside() );
FieldVector< ctype, dimensionworld > normal;
jit.mv( refNormal, normal );
return normal;
}
FieldVector< ctype, dimensionworld >
unitOuterNormal ( const FieldVector< ctype, dimension-1 > &local ) const
{
FieldVector< ctype, dimensionworld > normal = outerNormal( local );
normal *= (ctype( 1 ) / normal.two_norm());
return normal;
}
FieldVector< ctype, dimensionworld > centerUnitOuterNormal () const
{
auto refFace = referenceElement< ctype, dimension-1 >( type() );
return unitOuterNormal( refFace.position( 0, 0 ) );
}
const HostIntersection &hostIntersection () const
{
return hostIntersection_;
}
const Grid &grid () const { return insideGeo_.grid(); }
private:
HostIntersection hostIntersection_;
ElementGeometryImpl insideGeo_;
mutable GeometryImpl geo_;
};
} // namespace GeoGrid
} // namespace Dune
#endif // #ifndef DUNE_GEOGRID_INTERSECTION_HH
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