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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2007 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: SpectralMethod.cpp,v 1.4 2007/06/09 14:25:58 delpinux Exp $
#include <SpectralMethod.hpp>
#include <SpectralDiscretization.hpp>
#include <BoundaryConditionDiscretizationSpectral.hpp>
#include <PDESolution.hpp>
#include <PDEProblem.hpp>
#include <SpectralMesh.hpp>
#include <KrylovSolver.hpp>
#include <MatrixManagement.hpp>
#include <SparseMatrix.hpp>
#include <Timer.hpp>
#include <ErrorHandler.hpp>
template <typename MeshType,
DiscretizationType::Type TypeOfDiscretization>
void SpectralMethod::__discretizeOnMesh()
{
// overwritting memory matrix
ParameterCenter::instance().set("memory::matrix","none");
MemoryManager MM;
bool performAssembling =MM.ReserveMatrix(__A,
problem().numberOfUnknown(),
__degreeOfFreedomSet.size());
MM.ReserveVector(__b,
problem().numberOfUnknown(),
__degreeOfFreedomSet.size());
ffout(2) << "Spectral method: disretization...\n";
ReferenceCounting<SpectralDiscretization<TypeOfDiscretization> > spectralMethod
= new SpectralDiscretization<TypeOfDiscretization>(problem(),
dynamic_cast<MeshType&>(mesh()),
*__A,*__b, __degreeOfFreedomSet);
// if (performAssembling) {
spectralMethod->assembleMatrix();
// } else {
// ffout(2) << "- keeping previous operator discretization\n";
// }
spectralMethod->assembleSecondMember();
ffout(2) << "- discretizing boundary conditions\n";
BoundaryConditionDiscretizationSpectral* bcd
= new BoundaryConditionDiscretizationSpectral(problem(),
dynamic_cast<MeshType&>(mesh()),
__degreeOfFreedomSet);
// bcd->associatesMeshesToBoundaryConditions();
ReferenceCounting<BoundaryConditionDiscretization> bcDiscretization = bcd;
// // Set Dirichlet information to the matrix
// FEM->setDirichletList(bcDiscretization->getDirichletList());
ffout(2) << "- second member modification\n";
bcDiscretization->setSecondMember(__A,__b);
ffout(2) << "- matrix modification\n";
bcDiscretization->setMatrix(__A,__b);
ffout(2) << "Spectral method: disretization done\n";
if (__A->type() == BaseMatrix::doubleHashedMatrix) {
Timer t;
t.start();
SparseMatrix* aa
= new SparseMatrix(static_cast<DoubleHashedMatrix&>(*__A));
__A = aa; // now use sparse matrix
t.stop();
ffout(2) << "Matrix copy: " << t << '\n';
}
}
template <DiscretizationType::Type TypeOfDiscretization>
void SpectralMethod::__discretize()
{
switch (mesh().type()) {
case Mesh::spectralMesh: {
this->__discretizeOnMesh<SpectralMesh, TypeOfDiscretization>();
break;
}
default: {
throw ErrorHandler(__FILE__, __LINE__,
"Cannot use '"+mesh().typeName()+"' for spectral method computations",
ErrorHandler::normal);
}
}
}
void SpectralMethod::Discretize (ConstReferenceCounting<Problem> Pb)
{
__problem = Pb;
switch(__discretizationType.type()) {
case DiscretizationType::spectralLegendre: {
this->__discretize<DiscretizationType::spectralLegendre>();
return;
}
default: {
throw ErrorHandler(__FILE__,__LINE__,
"Discretization type not implemented",
ErrorHandler::normal);
}
}
}
void SpectralMethod::Compute (Solution& U)
{
PDESolution& u = static_cast<PDESolution&>(U);
KrylovSolver K(*__A, *__b, __degreeOfFreedomSet);
K.solve(problem(), u.values());
}
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