5#ifndef DUNE_ISTL_ILUSUBDOMAINSOLVER_HH
6#define DUNE_ISTL_ILUSUBDOMAINSOLVER_HH
35 template<
class M,
class X,
class Y>
51 virtual void apply (X& v,
const Y& d) =0;
76 template<
class M,
class X,
class Y>
82 typedef typename std::remove_const<M>::type rilu_type;
95 ILU::blockILUBacksolve(this->
ILU,v,d);
109 template<
class M,
class X,
class Y>
110 class ILUNSubdomainSolver
111 :
public ILUSubdomainSolver<M,X,Y>{
114 typedef typename std::remove_const<M>::type matrix_type;
115 typedef typename std::remove_const<M>::type rilu_type;
117 typedef X domain_type;
119 typedef Y range_type;
125 void apply (X& v,
const Y& d)
127 ILU::blockILUBacksolve(RILU,v,d);
138 void setSubMatrix(
const M& A, S& rowset);
149 template<
class M,
class X,
class Y>
155 typedef typename M::size_type size_type;
156 typedef std::map<typename S::value_type,size_type> IndexMap;
157 typedef typename IndexMap::iterator IMIter;
159 IMIter guess = indexMap.begin();
160 size_type localIndex=0;
162 typedef typename S::const_iterator SIter;
163 for(SIter rowIdx = rowSet.begin(), rowEnd=rowSet.end();
164 rowIdx!= rowEnd; ++rowIdx, ++localIndex)
165 guess = indexMap.insert(guess,
166 std::make_pair(*rowIdx,localIndex));
170 ILU.setSize(rowSet.size(),rowSet.size());
171 ILU.setBuildMode(matrix_type::row_wise);
174 typedef typename matrix_type::CreateIterator CIter;
175 CIter rowCreator = ILU.createbegin();
176 std::size_t offset=0;
177 for(SIter rowIdx = rowSet.begin(), rowEnd=rowSet.end();
178 rowIdx!= rowEnd; ++rowIdx, ++rowCreator) {
181 guess = indexMap.begin();
183 for(
typename matrix_type::ConstColIterator col=A[*rowIdx].begin(),
184 endcol=A[*rowIdx].end(); col != endcol; ++col) {
186 guess = indexMap.find(col.index());
187 if(guess!=indexMap.end()) {
189 rowCreator.insert(guess->second);
190 offset=std::max(offset,(std::size_t)std::abs((
int)(guess->second-rowCreator.index())));
197 typename matrix_type::iterator iluRow=ILU.begin();
199 for(SIter rowIdx = rowSet.begin(), rowEnd=rowSet.end();
200 rowIdx!= rowEnd; ++rowIdx, ++iluRow) {
203 typename matrix_type::ColIterator localCol=iluRow->begin();
204 for(
typename matrix_type::ConstColIterator col=A[*rowIdx].begin(),
205 endcol=A[*rowIdx].end(); col != endcol; ++col) {
207 guess = indexMap.find(col.index());
208 if(guess!=indexMap.end()) {
219 template<
class M,
class X,
class Y>
223 this->copyToLocalMatrix(A,rowSet);
224 ILU::blockILU0Decomposition(this->ILU);
227 template<
class M,
class X,
class Y>
229 void ILUNSubdomainSolver<M,X,Y>::setSubMatrix(
const M& A, S& rowSet)
231 std::size_t offset=copyToLocalMatrix(A,rowSet);
232 RILU.setSize(rowSet.size(),rowSet.size(), (1+2*offset)*rowSet.size());
233 RILU.setBuildMode(matrix_type::row_wise);
234 ILU::blockILUDecomposition(this->ILU, (offset+1)/2, RILU);
Exact subdomain solver using ILU(p) with appropriate p.
Definition: ilusubdomainsolver.hh:78
X domain_type
The domain type of the preconditioner.
Definition: ilusubdomainsolver.hh:84
Y range_type
The range type of the preconditioner.
Definition: ilusubdomainsolver.hh:86
std::remove_const< M >::type matrix_type
The matrix type the preconditioner is for.
Definition: ilusubdomainsolver.hh:81
void apply(X &v, const Y &d)
Apply the subdomain solver.
Definition: ilusubdomainsolver.hh:93
base class encapsulating common algorithms of ILU0SubdomainSolver and ILUNSubdomainSolver.
Definition: ilusubdomainsolver.hh:36
matrix_type ILU
The ILU0 decomposition of the matrix, or the local matrix.
Definition: ilusubdomainsolver.hh:67
X domain_type
The domain type of the preconditioner.
Definition: ilusubdomainsolver.hh:41
Y range_type
The range type of the preconditioner.
Definition: ilusubdomainsolver.hh:43
std::remove_const< M >::type matrix_type
The matrix type the preconditioner is for.
Definition: ilusubdomainsolver.hh:39
virtual void apply(X &v, const Y &d)=0
Apply the subdomain solver.
std::size_t copyToLocalMatrix(const M &A, S &rowset)
Copy the local part of the global matrix to ILU.
Definition: ilusubdomainsolver.hh:151
void setSubMatrix(const M &A, S &rowset)
Set the data of the local problem.
Definition: ilusubdomainsolver.hh:221
A dynamic dense block matrix class.
Dune namespace.
Definition: alignedallocator.hh:13
Define general preconditioner interface.
Traits for type conversions and type information.