/usr/include/dune/grid/albertagrid/meshpointer.hh is in libdune-grid-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_ALBERTA_MESHPOINTER_HH
#define DUNE_ALBERTA_MESHPOINTER_HH
/** \file
* \author Martin Nolte
* \brief provides a wrapper for ALBERTA's mesh structure
*/
#include <limits>
#include <string>
#include <dune/grid/albertagrid/misc.hh>
#include <dune/grid/albertagrid/elementinfo.hh>
#include <dune/grid/albertagrid/macrodata.hh>
#include <dune/grid/albertagrid/projection.hh>
#if HAVE_ALBERTA
namespace Dune
{
namespace Alberta
{
// External Forward Declarations
// -----------------------------
template< int dim >
class HierarchyDofNumbering;
// MeshPointer
// -----------
template< int dim >
class MeshPointer
{
typedef Alberta::ElementInfo< dim > ElementInfo;
typedef typename ElementInfo::MacroElement MacroElement;
typedef typename ElementInfo::FillFlags FillFlags;
class BoundaryProvider;
template< int dimWorld >
struct Library;
public:
class MacroIterator;
MeshPointer ()
: mesh_( 0 )
{}
explicit MeshPointer ( Mesh *mesh )
: mesh_( mesh )
{}
operator Mesh * () const
{
return mesh_;
}
operator bool () const
{
return (bool)mesh_;
}
MacroIterator begin () const
{
return MacroIterator( *this, false );
}
MacroIterator end () const
{
return MacroIterator( *this, true );
}
int numMacroElements () const;
int size ( int codim ) const;
// create a mesh from a macrodata structure
// params: macroData - macro data structure
// returns: number of boundary segments
unsigned int create ( const MacroData< dim > ¯oData );
// create a mesh from a macrodata structure, adding projections
// params: macroData - macro data structure
// projectionFactory - factory for the projections
// returns: number of boundary segments
template< class Proj, class Impl >
unsigned int create ( const MacroData< dim > ¯oData,
const ProjectionFactoryInterface< Proj, Impl > &projectionFactory );
// create a mesh from a file
// params: filename - file name of an Alberta macro triangulation
// binary - read binary?
// returns: number of boundary segments
unsigned int create ( const std::string &filename, bool binary = false );
// read back a mesh from a file
// params: filename - file name of an Alberta save file
// time - variable to receive the time stored in the file
// returns: number of boundary segments
//
// notes: - projections are not preserved
// - we assume that projections are added in the same order they
// inserted in when the grid was created (otherwise the boundary
// indices change)
unsigned int read ( const std::string &filename, Real &time );
bool write ( const std::string &filename, Real time ) const;
void release ();
template< class Functor >
void hierarchicTraverse ( Functor &functor,
typename FillFlags::Flags fillFlags = FillFlags::standard ) const;
template< class Functor >
void leafTraverse ( Functor &functor,
typename FillFlags::Flags fillFlags = FillFlags::standard ) const;
bool coarsen ( typename FillFlags::Flags fillFlags = FillFlags::nothing );
bool refine ( typename FillFlags::Flags fillFlags = FillFlags::nothing );
private:
static ALBERTA NODE_PROJECTION *
initNodeProjection ( Mesh *mesh, ALBERTA MACRO_EL *macroElement, int n );
template< class ProjectionProvider >
static ALBERTA NODE_PROJECTION *
initNodeProjection ( Mesh *mesh, ALBERTA MACRO_EL *macroElement, int n );
Mesh *mesh_;
};
// MeshPointer::Library
// --------------------
template< int dim >
template< int dimWorld >
struct MeshPointer< dim >::Library
{
typedef Alberta::MeshPointer< dim > MeshPointer;
static unsigned int boundaryCount;
static const void *projectionFactory;
static void
create ( MeshPointer &ptr, const MacroData< dim > ¯oData,
ALBERTA NODE_PROJECTION *(*initNodeProjection)( Mesh *, ALBERTA MACRO_EL *, int ) );
static void release ( MeshPointer &ptr );
};
// MeshPointer::MacroIterator
// --------------------------
template< int dim >
class MeshPointer< dim >::MacroIterator
{
typedef MacroIterator This;
friend class MeshPointer< dim >;
public:
typedef Alberta::MeshPointer< dim > MeshPointer;
typedef Alberta::ElementInfo< dim > ElementInfo;
MacroIterator ()
: mesh_(),
index_( -1 )
{}
private:
explicit MacroIterator ( const MeshPointer &mesh, bool end = false )
: mesh_( mesh ),
index_( end ? mesh.numMacroElements() : 0 )
{}
public:
bool done () const
{
return (index_ >= mesh().numMacroElements());
}
bool equals ( const MacroIterator &other ) const
{
return (index_ == other.index_);
}
void increment ()
{
assert( !done() );
++index_;
}
const MacroElement ¯oElement () const
{
assert( !done() );
return static_cast< const MacroElement & >( mesh().mesh_->macro_els[ index_ ] );
}
const MeshPointer &mesh () const
{
return mesh_;
}
This &operator++ ()
{
increment();
return *this;
}
ElementInfo operator* () const
{
return elementInfo();
}
bool operator== ( const MacroIterator &other ) const
{
return equals( other );
}
bool operator!= ( const MacroIterator &other ) const
{
return !equals( other );
}
ElementInfo
elementInfo ( typename FillFlags::Flags fillFlags = FillFlags::standard ) const
{
if( done() )
return ElementInfo();
else
return ElementInfo( mesh(), macroElement(), fillFlags );
}
private:
MeshPointer mesh_;
int index_;
};
// Implementation of MeshPointer
// -----------------------------
template< int dim >
inline int MeshPointer< dim >::numMacroElements () const
{
return (mesh_ ? mesh_->n_macro_el : 0);
}
template<>
inline int MeshPointer< 1 >::size( int codim ) const
{
assert( (codim >= 0) && (codim <= 1) );
return (codim == 0 ? mesh_->n_elements : mesh_->n_vertices);
}
template<>
inline int MeshPointer< 2 >::size( int codim ) const
{
assert( (codim >= 0) && (codim <= 2) );
if( codim == 0 )
return mesh_->n_elements;
else if( codim == 2 )
return mesh_->n_vertices;
else
return mesh_->n_edges;
}
template<>
inline int MeshPointer< 3 >::size( int codim ) const
{
assert( (codim >= 0) && (codim <= 3) );
if( codim == 0 )
return mesh_->n_elements;
else if( codim == 3 )
return mesh_->n_vertices;
else if( codim == 1 )
return mesh_->n_faces;
else
return mesh_->n_edges;
}
template< int dim >
inline unsigned int MeshPointer< dim >
::create ( const MacroData< dim > ¯oData )
{
release();
Library< dimWorld >::boundaryCount = 0;
Library< dimWorld >::create( *this, macroData, &initNodeProjection );
return Library< dimWorld >::boundaryCount;
}
template< int dim >
template< class Proj, class Impl >
inline unsigned int MeshPointer< dim >
::create ( const MacroData< dim > ¯oData,
const ProjectionFactoryInterface< Proj, Impl > &projectionFactory )
{
typedef ProjectionFactoryInterface< Proj, Impl > ProjectionFactory;
release();
Library< dimWorld >::boundaryCount = 0;
Library< dimWorld >::projectionFactory = &projectionFactory;
Library< dimWorld >::create( *this, macroData, &initNodeProjection< ProjectionFactory > );
Library< dimWorld >::projectionFactory = 0;
return Library< dimWorld >::boundaryCount;
}
template< int dim >
inline unsigned int MeshPointer< dim >
::create ( const std::string &filename, bool binary )
{
MacroData< dim > macroData;
macroData.read( filename, binary );
const unsigned int boundaryCount = create( macroData );
macroData.release();
return boundaryCount;
}
template< int dim >
inline unsigned int MeshPointer< dim >::read ( const std::string &filename, Real &time )
{
release();
Library< dimWorld >::boundaryCount = 0;
mesh_ = ALBERTA read_mesh_xdr( filename.c_str(), &time, NULL, NULL );
return Library< dimWorld >::boundaryCount;
}
template< int dim >
inline bool MeshPointer< dim >::write ( const std::string &filename, Real time ) const
{
int success = ALBERTA write_mesh_xdr( mesh_, filename.c_str(), time );
return (success == 0);
}
template< int dim >
inline void MeshPointer< dim >::release ()
{
Library< dimWorld >::release( *this );
}
template< int dim >
template< class Functor >
inline void MeshPointer< dim >
::hierarchicTraverse ( Functor &functor,
typename FillFlags::Flags fillFlags ) const
{
const MacroIterator eit = end();
for( MacroIterator it = begin(); it != eit; ++it )
{
const ElementInfo info = it.elementInfo( fillFlags );
info.hierarchicTraverse( functor );
}
}
template< int dim >
template< class Functor >
inline void MeshPointer< dim >
::leafTraverse ( Functor &functor,
typename FillFlags::Flags fillFlags ) const
{
const MacroIterator eit = end();
for( MacroIterator it = begin(); it != eit; ++it )
{
const ElementInfo info = it.elementInfo( fillFlags );
info.leafTraverse( functor );
}
}
template< int dim >
inline bool MeshPointer< dim >::coarsen ( typename FillFlags::Flags fillFlags )
{
const bool coarsened = (ALBERTA coarsen( mesh_, fillFlags ) == meshCoarsened);
if( coarsened )
ALBERTA dof_compress( mesh_ );
return coarsened;
}
template< int dim >
inline bool MeshPointer< dim >::refine ( typename FillFlags::Flags fillFlags )
{
return (ALBERTA refine( mesh_, fillFlags ) == meshRefined);
}
template< int dim >
inline ALBERTA NODE_PROJECTION *
MeshPointer< dim >::initNodeProjection ( Mesh *mesh, ALBERTA MACRO_EL *macroEl, int n )
{
const MacroElement ¯oElement = static_cast< const MacroElement & >( *macroEl );
if( (n > 0) && macroElement.isBoundary( n-1 ) )
return new BasicNodeProjection( Library< dimWorld >::boundaryCount++ );
else
return 0;
}
template< int dim >
template< class ProjectionFactory >
inline ALBERTA NODE_PROJECTION *
MeshPointer< dim >::initNodeProjection ( Mesh *mesh, ALBERTA MACRO_EL *macroEl, int n )
{
typedef typename ProjectionFactory::Projection Projection;
const MacroElement ¯oElement = static_cast< const MacroElement & >( *macroEl );
MeshPointer< dim > meshPointer( mesh );
ElementInfo elementInfo( meshPointer, macroElement, FillFlags::standard );
const ProjectionFactory &projectionFactory = *static_cast< const ProjectionFactory * >( Library< dimWorld >::projectionFactory );
if( (n > 0) && macroElement.isBoundary( n-1 ) )
{
const unsigned int boundaryIndex = Library< dimWorld >::boundaryCount++;
if( projectionFactory.hasProjection( elementInfo, n-1 ) )
{
Projection projection = projectionFactory.projection( elementInfo, n-1 );
return new NodeProjection< dim, Projection >( boundaryIndex, projection );
}
else
return new BasicNodeProjection( boundaryIndex );
}
else if( (dim < dimWorld) && (n == 0) )
{
const unsigned int boundaryIndex = std::numeric_limits< unsigned int >::max();
if( projectionFactory.hasProjection( elementInfo ) )
{
Projection projection = projectionFactory.projection( elementInfo );
return new NodeProjection< dim, Projection >( boundaryIndex, projection );
}
else
return 0;
}
else
return 0;
}
} // namespace Alberta
} // namespace Dune
#endif // #if HAVE_ALBERTA
#endif // #ifndef DUNE_ALBERTA_MESHPOINTER_HH
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