/usr/include/dune/geometry/genericgeometry/conversion.hh is in libdune-geometry-dev 2.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GEOMETRY_GENERICGEOMETRY_CONVERSION_HH
#define DUNE_GEOMETRY_GENERICGEOMETRY_CONVERSION_HH
#include <dune/common/visibility.hh>
#include <dune/geometry/type.hh>
#include <dune/geometry/genericgeometry/topologytypes.hh>
#include <dune/geometry/genericgeometry/subtopologies.hh>
namespace Dune
{
namespace GenericGeometry
{
// DuneGeometryType
// ----------------
/** \class DuneGeometryType
* \ingroup GenericGeometry
* \brief statically convert a generic topology type into a GeometryType
*
* \tparam Topology topology type to be converted
* \tparam linetype basic geometry type to assign to a line
* (either simplex or cube)
*/
template< class Topology, GeometryType::BasicType linetype >
class DuneGeometryType;
template< GeometryType::BasicType linetype >
class DuneGeometryType< Point, linetype >
{
static_assert((linetype == GeometryType::simplex)
|| (linetype == GeometryType::cube),
"Parameter linetype may only be a simplex or a cube.");
public:
static const unsigned int dimension = 0;
static const GeometryType::BasicType basicType = linetype;
};
template< class BaseTopology, GeometryType::BasicType linetype >
class DuneGeometryType< Prism< BaseTopology >, linetype >
{
typedef DuneGeometryType< BaseTopology, linetype > DuneBaseGeometryType;
static_assert((linetype == GeometryType::simplex)
|| (linetype == GeometryType::cube),
"Parameter linetype may only be a simplex or a cube.");
static_assert((DuneBaseGeometryType::basicType == GeometryType::simplex)
|| (DuneBaseGeometryType::basicType == GeometryType::cube),
"Only prisms over simplices or cubes can be converted.");
public:
static const unsigned int dimension = DuneBaseGeometryType::dimension + 1;
static const GeometryType::BasicType basicType
= ((dimension == 1)
? linetype
: ((dimension == 2) || (DuneBaseGeometryType::basicType == GeometryType::cube))
? GeometryType::cube
: GeometryType::prism);
};
template< class BaseTopology, GeometryType::BasicType linetype >
class DuneGeometryType< Pyramid< BaseTopology >, linetype >
{
typedef DuneGeometryType< BaseTopology, linetype > DuneBaseGeometryType;
static_assert((linetype == GeometryType::simplex)
|| (linetype == GeometryType::cube),
"Parameter linetype may only be a simplex or a cube.");
static_assert((DuneBaseGeometryType::basicType == GeometryType::simplex)
|| (DuneBaseGeometryType::basicType == GeometryType::cube),
"Only pyramids over simplices or cubes can be converted.");
public:
static const unsigned int dimension = DuneBaseGeometryType::dimension + 1;
static const GeometryType::BasicType basicType
= ((dimension == 1)
? linetype
: ((dimension == 2) || (DuneBaseGeometryType::basicType == GeometryType::simplex))
? GeometryType::simplex
: GeometryType::pyramid);
};
// DuneGeometryTypeProvider
// ------------------------
/** \class DuneGeometryTypeProvider
* \brief dynamically convert a generic topology type into a GeometryType
*
* \tparam dim dimension of the topologies to be converted
* \tparam linetype basic geometry type to assign to a line
* (either simplex or cube)
*
* \note After 3D not all geometries are simplices, pyramids, prisms or
* cubes so that no meaningful GeometryType is available; therefore
* none is returned.
*/
template< unsigned int dim, GeometryType::BasicType linetype >
struct DuneGeometryTypeProvider
{
/** \brief dimension of the topologies to be converted */
static const unsigned int dimension = dim;
/** \brief number of possible topologies */
static const unsigned int numTopologies = (1 << dimension);
private:
GeometryType types_[ (dimension>=1) ? numTopologies / 2 : numTopologies ];
DUNE_EXPORT static const DuneGeometryTypeProvider &instance ()
{
static DuneGeometryTypeProvider inst;
return inst;
}
public:
/** \brief obtain a Geometry type from a topology id
*
* \param[in] topologyId id of the topology to be converted
*
* \returns GeometryType associated with the given topology id
*/
static const GeometryType &type ( unsigned int topologyId )
{
assert( topologyId < numTopologies );
return instance().types_[ topologyId / 2 ];
}
};
// Convert
// -------
template< GeometryType :: BasicType type, unsigned int dim >
struct Convert;
template< unsigned int dim >
struct Convert< GeometryType :: simplex, dim >
{
typedef Pyramid
< typename Convert< GeometryType :: simplex, dim-1 > :: type >
type;
};
template<>
struct Convert< GeometryType :: simplex, 0 >
{
typedef Point type;
};
template< unsigned int dim >
struct Convert< GeometryType :: cube, dim >
{
typedef Prism< typename Convert< GeometryType :: cube, dim-1 > :: type >
type;
};
template<>
struct Convert< GeometryType :: cube, 0 >
{
typedef Point type;
};
template< unsigned int dim >
struct Convert< GeometryType :: prism, dim >
{
typedef Prism
< typename Convert< GeometryType :: simplex, dim-1 > :: type >
type;
};
template< unsigned int dim >
struct Convert< GeometryType :: pyramid, dim >
{
typedef Pyramid
< typename Convert< GeometryType :: cube, dim-1 > :: type >
type;
};
}
}
#endif // #ifndef DUNE_GEOMETRY_GENERICGEOMETRY_CONVERSION_HH
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