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// $Id: mg_matrix.h 20871 2010-03-21 19:22:22Z kanschat $
// Version: $Name$
//
// Copyright (C) 2003, 2004, 2005, 2006, 2009, 2010 by the deal.II authors
//
// This file is subject to QPL and may not be distributed
// without copyright and license information. Please refer
// to the file deal.II/doc/license.html for the text and
// further information on this license.
//
//---------------------------------------------------------------------------
#ifndef __deal2__mg_matrix_h
#define __deal2__mg_matrix_h
#include <lac/vector.h>
#include <lac/sparse_matrix.h>
#include <multigrid/mg_base.h>
#include <base/mg_level_object.h>
DEAL_II_NAMESPACE_OPEN
/*!@addtogroup mg */
/*@{*/
/**
* Multilevel matrix. This class implements the interface defined by
* MGMatrixBase, using MGLevelObject of an arbitrary
* matrix class.
*
* @author Guido Kanschat, 2002
*/
template <class MATRIX = SparseMatrix<double>, class VECTOR = Vector<double> >
class MGMatrix : public MGMatrixBase<VECTOR>
{
public:
/**
* Constructor. The argument is
* handed over to the
* @p SmartPointer
* constructor. The matrix object
* must exist longer as the
* @p MGMatrix object, since
* only a pointer is stored.
*/
MGMatrix (MGLevelObject<MATRIX>* = 0);
/**
* Set the matrix object to be
* used. The matrix object must
* exist longer as the
* @p MGMatrix object, since
* only a pointer is stored.
*/
void set_matrix (MGLevelObject<MATRIX>* M);
/**
* Matrix-vector-multiplication on
* a certain level.
*/
virtual void vmult (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const;
/**
* Adding matrix-vector-multiplication on
* a certain level.
*/
virtual void vmult_add (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const;
/**
* Transpose
* matrix-vector-multiplication on
* a certain level.
*/
virtual void Tvmult (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const;
/**
* Adding transpose
* matrix-vector-multiplication on
* a certain level.
*/
virtual void Tvmult_add (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const;
/**
* Memory used by this object.
*/
unsigned int memory_consumption () const;
private:
/**
* Pointer to the matrix objects on each level.
*/
SmartPointer<MGLevelObject<MATRIX>,MGMatrix<MATRIX,VECTOR> > matrix;
};
/**
* Multilevel matrix selecting from block matrices. This class
* implements the interface defined by MGMatrixBase. The
* template parameter @p MATRIX should be a block matrix class like
* BlockSparseMatrix or @p BlockSparseMatrixEZ. Then, this
* class stores a pointer to a MGLevelObject of this matrix
* class. In each @p vmult, the block selected on initialization will
* be multiplied with the vector provided.
*
* @author Guido Kanschat, 2002
*/
template <class MATRIX, typename number>
class MGMatrixSelect : public MGMatrixBase<Vector<number> >
{
public:
/**
* Constructor. @p row and
* @p col are the coordinate of
* the selected block. The other
* argument is handed over to the
* @p SmartPointer constructor.
*/
MGMatrixSelect (const unsigned int row = 0,
const unsigned int col = 0,
MGLevelObject<MATRIX>* = 0);
/**
* Set the matrix object to be
* used. The matrix object must
* exist longer as the
* @p MGMatrix object, since
* only a pointer is stored.
*/
void set_matrix (MGLevelObject<MATRIX>* M);
/**
* Select the block for
* multiplication.
*/
void select_block (const unsigned int row,
const unsigned int col);
/**
* Matrix-vector-multiplication on
* a certain level.
*/
virtual void vmult (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const;
/**
* Adding matrix-vector-multiplication on
* a certain level.
*/
virtual void vmult_add (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const;
/**
* Transpose
* matrix-vector-multiplication on
* a certain level.
*/
virtual void Tvmult (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const;
/**
* Adding transpose
* matrix-vector-multiplication on
* a certain level.
*/
virtual void Tvmult_add (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const;
private:
/**
* Pointer to the matrix objects on each level.
*/
SmartPointer<MGLevelObject<MATRIX>,MGMatrixSelect<MATRIX,number> > matrix;
/**
* Row coordinate of selected block.
*/
unsigned int row;
/**
* Column coordinate of selected block.
*/
unsigned int col;
};
/*@}*/
/*----------------------------------------------------------------------*/
template <class MATRIX, class VECTOR>
MGMatrix<MATRIX, VECTOR>::MGMatrix (MGLevelObject<MATRIX>* p)
:
matrix (p, typeid(*this).name())
{}
template <class MATRIX, class VECTOR>
void
MGMatrix<MATRIX, VECTOR>::set_matrix (MGLevelObject<MATRIX>* p)
{
matrix = p;
}
template <class MATRIX, class VECTOR>
void
MGMatrix<MATRIX, VECTOR>::vmult (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].vmult(dst, src);
}
template <class MATRIX, class VECTOR>
void
MGMatrix<MATRIX, VECTOR>::vmult_add (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].vmult_add(dst, src);
}
template <class MATRIX, class VECTOR>
void
MGMatrix<MATRIX, VECTOR>::Tvmult (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].Tvmult(dst, src);
}
template <class MATRIX, class VECTOR>
void
MGMatrix<MATRIX, VECTOR>::Tvmult_add (const unsigned int level,
VECTOR& dst,
const VECTOR& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].Tvmult_add(dst, src);
}
template <class MATRIX, class VECTOR>
unsigned int
MGMatrix<MATRIX, VECTOR>::memory_consumption () const
{
return sizeof(*this) + matrix->memory_consumption();
}
/*----------------------------------------------------------------------*/
template <class MATRIX, typename number>
MGMatrixSelect<MATRIX, number>::
MGMatrixSelect (const unsigned int row,
const unsigned int col,
MGLevelObject<MATRIX>* p)
:
matrix (p, typeid(*this).name()),
row(row),
col(col)
{}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::set_matrix (MGLevelObject<MATRIX>* p)
{
matrix = p;
}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::
select_block (const unsigned int brow,
const unsigned int bcol)
{
row = brow;
col = bcol;
}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::
vmult (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].block(row, col).vmult(dst, src);
}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::
vmult_add (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].block(row, col).vmult_add(dst, src);
}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::
Tvmult (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].block(row, col).Tvmult(dst, src);
}
template <class MATRIX, typename number>
void
MGMatrixSelect<MATRIX, number>::
Tvmult_add (const unsigned int level,
Vector<number>& dst,
const Vector<number>& src) const
{
Assert(matrix != 0, ExcNotInitialized());
const MGLevelObject<MATRIX>& m = *matrix;
m[level].block(row, col).Tvmult_add(dst, src);
}
DEAL_II_NAMESPACE_CLOSE
#endif
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