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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: Discretization.hpp,v 1.5 2007/05/20 23:25:14 delpinux Exp $
#ifndef DISCRETIZATION_HPP
#define DISCRETIZATION_HPP
#include <ReferenceCounting.hpp>
#include <BaseVector.hpp>
#include <Vector.hpp>
#include <BaseMatrix.hpp>
#include <PDESystem.hpp>
/**
* @file Discretization.hpp
* @author Stephane Del Pino
* @date Wed Jul 19 15:48:26 2006
*
* @brief this class is used to define discretizations of PDEProblems.
*
*
*/
class Discretization
{
public:
//! The set of discretization types
enum Type {
FEM,
spectral
};
protected:
//! The discretization type
const Discretization::Type __type;
//! The PDEProblem to discretize.
const Problem& __problem;
//! The matrix which will contain the discretization.
BaseMatrix& __A;
//! The second member
BaseVector& __b;
//! elimination dirichlet informations
const Vector<bool>* __dirichletList;
public:
/**
* Sets dirichlet vertices list
*
* @param dirichletList list of dirichlet vertices
*/
void setDirichletList(const Vector<bool>& dirichletList)
{
ASSERT(__dirichletList == 0);
__dirichletList = &dirichletList;
}
/**
* Computes the matrix using the problem
*
*/
virtual void assembleMatrix() = 0;
/**
* Computes the second memeber using the problem
*
*/
virtual void assembleSecondMember() = 0;
/**
* Provides interface for to allow computation without matrix
*
* @param u the vector representing the diagonal
*/
virtual void getDiagonal(BaseVector& u) const = 0;
/**
* Provides interface for to allow computation without matrix
*
* @param x the vector @f$ x @f$
* @param v the result @f$ A^T x @f$
*/
virtual void transposedTimesX(const BaseVector& x, BaseVector& v) const = 0;
/**
* Provides interface for to allow computation without matrix
*
* @param x the vector @f$ x @f$
* @param v the result @f$ A x @f$
*/
virtual void timesX(const BaseVector& x, BaseVector& v) const = 0;
/**
* Read only access to the problem
*
* @return __problem
*/
const Problem& problem() const
{
return __problem;
}
/**
* Read only access to the discretization type
*
* @return __type
*/
const Discretization::Type&
type() const
{
return __type;
}
/**
* Access to the matrix
*
* @return __A
*/
BaseMatrix& A()
{
return __A;
}
/**
* Access to the second member
*
* @return __b
*/
BaseVector& b()
{
return __b;
}
/*!
The constructor.
The matrix A and the second member b should be computed here.
*/
/**
* Constructor
*
* @param t discretization type
* @param p given problem
* @param A matrix to build
* @param b second member
*/
Discretization(const Discretization::Type& t,
const Problem& p,
BaseMatrix& A,
BaseVector& b)
: __type(t),
__problem(p),
__A(A),
__b(b),
__dirichletList(0)
{
;
}
/**
* Copy constructor
*
* @param d discretization
*/
Discretization(const Discretization& d)
: __type(d.__type),
__problem(d.__problem),
__A(d.__A),
__b(d.__b),
__dirichletList(0)
{
;
}
/**
* Destructor
*
*
*/
virtual ~Discretization()
{
;
}
};
#endif // DISCRETIZATION_HPP
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