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// $Id: dof_objects.h 30036 2013-07-18 16:55:32Z maier $
//
// Copyright (C) 2006 - 2013 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------
#ifndef __deal2__dof_objects_h
#define __deal2__dof_objects_h
#include <deal.II/base/config.h>
#include <deal.II/base/exceptions.h>
#include <vector>
DEAL_II_NAMESPACE_OPEN
template <int, int> class DoFHandler;
namespace internal
{
namespace DoFHandler
{
template <int> class DoFLevel;
template <int> class DoFFaces;
/**
* Store the indices of the degrees of freedom which are located on
* objects of dimension @p dim.
*
* <h3>Information for all DoFObjects classes</h3>
*
* The DoFObjects classes store the global indices of the
* degrees of freedom for each cell on a certain level. The global
* index or number of a degree of freedom is the zero-based index of
* the according value in the solution vector and the row and column
* index in the global matrix or the multigrid matrix for this
* level. These indices refer to the unconstrained vectors and
* matrices, where we have not taken account of the constraints
* introduced by hanging nodes.
*
* Since vertices are not associated with a particular level, the
* indices associated with vertices are not stored in the DoFObjects
* classes but rather in the DoFHandler::vertex_dofs array.
*
* The DoFObjects classes are not used directly, but objects
* of theses classes are included in the DoFLevel and
* DoFFaces classes.
*
* @ingroup dofs
* @author Tobias Leicht, 2006
*/
template <int dim>
class DoFObjects
{
public:
/**
* Store the global indices of
* the degrees of freedom.
*/
std::vector<types::global_dof_index> dofs;
public:
/**
* Set the global index of
* the @p local_index-th
* degree of freedom located
* on the object with number @p
* obj_index to the value
* given by the last
* argument. The @p
* dof_handler argument is
* used to access the finite
* element that is to be used
* to compute the location
* where this data is stored.
*
* The third argument, @p
* fe_index, must equal
* zero. It is otherwise
* unused, but we retain the
* argument so that we can
* use the same interface for
* non-hp and hp finite
* element methods, in effect
* making it possible to
* share the DoFAccessor
* class hierarchy between hp
* and non-hp classes.
*/
template <int dh_dim, int spacedim>
void
set_dof_index (const dealii::DoFHandler<dh_dim,spacedim> &dof_handler,
const unsigned int obj_index,
const unsigned int fe_index,
const unsigned int local_index,
const types::global_dof_index global_index);
/**
* Return the global index of
* the @p local_index-th
* degree of freedom located
* on the object with number @p
* obj_index. The @p
* dof_handler argument is
* used to access the finite
* element that is to be used
* to compute the location
* where this data is stored.
*
* The third argument, @p
* fe_index, must equal
* zero. It is otherwise
* unused, but we retain the
* argument so that we can
* use the same interface for
* non-hp and hp finite
* element methods, in effect
* making it possible to
* share the DoFAccessor
* class hierarchy between hp
* and non-hp classes.
*/
template <int dh_dim, int spacedim>
types::global_dof_index
get_dof_index (const dealii::DoFHandler<dh_dim,spacedim> &dof_handler,
const unsigned int obj_index,
const unsigned int fe_index,
const unsigned int local_index) const;
/**
* Return the value 1. The
* meaning of this function
* becomes clear by looking
* at what the corresponding
* functions in the classes
* internal::hp::DoFObjects
*/
template <int dh_dim, int spacedim>
unsigned int
n_active_fe_indices (const dealii::DoFHandler<dh_dim,spacedim> &dof_handler,
const types::global_dof_index index) const;
/**
* Similar to the function
* above. Assert that the
* given index is zero, and
* then return true.
*/
template <int dh_dim, int spacedim>
bool
fe_index_is_active (const dealii::DoFHandler<dh_dim,spacedim> &dof_handler,
const types::global_dof_index index,
const unsigned int fe_index) const;
/**
* Determine an estimate for the
* memory consumption (in bytes)
* of this object.
*/
std::size_t memory_consumption () const;
/**
* Read or write the data of this object to or
* from a stream for the purpose of serialization
*/
template <class Archive>
void serialize(Archive &ar,
const unsigned int version);
/**
* Make the DoFHandler and
* MGDoFHandler classes a
* friend, so that they can
* resize arrays as
* necessary.
*/
template <int> friend class DoFLevel;
template <int> friend class DoFFaces;
};
// --------------------- template and inline functions ------------------
template <int dim>
template <int dh_dim, int spacedim>
inline
unsigned int
DoFObjects<dim>::n_active_fe_indices (const dealii::DoFHandler<dh_dim,spacedim> &,
const types::global_dof_index) const
{
return 1;
}
template <int dim>
template <int dh_dim, int spacedim>
inline
bool
DoFObjects<dim>::fe_index_is_active (const dealii::DoFHandler<dh_dim,spacedim> &,
const types::global_dof_index,
const unsigned int fe_index) const
{
Assert (fe_index == 0,
ExcMessage ("Only zero fe_index values are allowed for "
"non-hp DoFHandlers."));
return true;
}
template <int dim>
template <int dh_dim, int spacedim>
inline
types::global_dof_index
DoFObjects<dim>::
get_dof_index (const dealii::DoFHandler<dh_dim,spacedim> &dof_handler,
const unsigned int obj_index,
const unsigned int fe_index,
const unsigned int local_index) const
{
Assert ((fe_index == dealii::DoFHandler<dh_dim,spacedim>::default_fe_index),
ExcMessage ("Only the default FE index is allowed for non-hp DoFHandler objects"));
Assert (local_index<dof_handler.get_fe().template n_dofs_per_object<dim>(),
ExcIndexRange (local_index, 0, dof_handler.get_fe().template n_dofs_per_object<dim>()));
Assert (obj_index * dof_handler.get_fe().template n_dofs_per_object<dim>()+local_index
<
dofs.size(),
ExcInternalError());
return dofs[obj_index * dof_handler.get_fe()
.template n_dofs_per_object<dim>() + local_index];
}
template <int dim>
template <class Archive>
void DoFObjects<dim>::serialize(Archive &ar,
const unsigned int)
{
ar &dofs;
}
}
}
DEAL_II_NAMESPACE_CLOSE
#endif
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