BOOST_AUTO_TEST_CASE_TEMPLATE(symmetric_matches_nonsymmetric_in_aca_mode,
ValueType, result_types)
{
typedef ValueType RT;
typedef typename Fiber::ScalarTraits<ValueType>::RealType RealType;
typedef RealType BFT;
if (boost::is_same<RT, std::complex<float> >::value) {
// The AHMED support for single-precision complex symmetric matrices
// is broken
BOOST_CHECK(true);
return;
}
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "../../examples/meshes/sphere-h-0.4.msh",
false /* verbose */);
PiecewiseLinearContinuousScalarSpace<BFT> pwiseLinears(grid);
PiecewiseConstantScalarSpace<BFT> pwiseConstants(grid);
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
AcaOptions acaOptions;
acaOptions.minimumBlockSize = 4;
assemblyOptions.switchToAcaMode(acaOptions);
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(4);
accuracyOptions.doubleSingular.setRelativeQuadratureOrder(2);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
const RT waveNumber = initWaveNumber<RT>();
BoundaryOperator<BFT, RT> opNonsymmetric =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseConstants),
make_shared_from_ref(pwiseLinears),
waveNumber,
"", NO_SYMMETRY);
BoundaryOperator<BFT, RT> opSymmetric =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseConstants),
make_shared_from_ref(pwiseLinears),
waveNumber,
"", SYMMETRIC);
arma::Mat<RT> matNonsymmetric = opNonsymmetric.weakForm()->asMatrix();
arma::Mat<RT> matSymmetric = opSymmetric.weakForm()->asMatrix();
BOOST_CHECK(check_arrays_are_close<RT>(
matNonsymmetric, matSymmetric, 2 * acaOptions.eps));
}
DefaultLocalAssemblerForIntegralOperatorsOnSurfacesManager(
bool cacheSingularIntegrals)
{
// Create a Bempp grid
shared_ptr<Grid> grid = createGrid();
// These important thing is that the domain and dualToRange spaces are
// different
piecewiseConstantSpace = std::auto_ptr<PiecewiseConstantSpace>(
new PiecewiseConstantSpace(grid));
piecewiseLinearSpace = std::auto_ptr<PiecewiseLinearSpace>(
new PiecewiseLinearSpace(grid));
op = std::auto_ptr<Operator>(new Operator(
make_shared_from_ref(*piecewiseConstantSpace),
make_shared_from_ref(*piecewiseLinearSpace),
make_shared_from_ref(*piecewiseLinearSpace),
"SLP"));
// Construct local assembler
Fiber::AccuracyOptions options;
options.doubleRegular.setRelativeQuadratureOrder(1);
quadStrategy = std::auto_ptr<QuadratureStrategy>(new QuadratureStrategy);
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
assemblyOptions.enableSingularIntegralCaching(cacheSingularIntegrals);
assembler = op->makeAssembler(*quadStrategy, assemblyOptions);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(L2Norm_works_for_constant_function_and_piecewise_constants, ResultType, result_types)
{
typedef ResultType RT;
typedef typename ScalarTraits<RT>::RealType BFT;
typedef typename ScalarTraits<RT>::RealType CT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "../../meshes/sphere-h-0.1.msh", false /* verbose */);
shared_ptr<Space<BFT> > space(
new PiecewiseConstantScalarSpace<BFT>(grid));
AccuracyOptions accuracyOptions;
shared_ptr<NumericalQuadratureStrategy<BFT, RT> > quadStrategy(
new NumericalQuadratureStrategy<BFT, RT>(accuracyOptions));
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
shared_ptr<Context<BFT, RT> > context(
new Context<BFT, RT>(quadStrategy, assemblyOptions));
Bempp::GridFunction<BFT, RT> fun(context, space, space,
surfaceNormalIndependentFunction(
ConstantFunction<RT>()));
CT norm = fun.L2Norm();
CT expectedNorm = sqrt(2. * 2. * 4. * M_PI);
BOOST_CHECK_CLOSE(norm, expectedNorm, 1 /* percent */);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(cubic_function_can_be_expanded_in_cubic_space, ResultType, result_types)
{
typedef ResultType RT;
typedef typename ScalarTraits<RT>::RealType BFT;
typedef typename ScalarTraits<RT>::RealType CT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "../../examples/meshes/sphere-h-0.2.msh", false /* verbose */);
shared_ptr<Space<BFT> > space(
new PiecewisePolynomialDiscontinuousScalarSpace<BFT>(grid, 3));
AccuracyOptions accuracyOptions;
accuracyOptions.singleRegular.setRelativeQuadratureOrder(2);
shared_ptr<NumericalQuadratureStrategy<BFT, RT> > quadStrategy(
new NumericalQuadratureStrategy<BFT, RT>(accuracyOptions));
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
shared_ptr<Context<BFT, RT> > context(
new Context<BFT, RT>(quadStrategy, assemblyOptions));
GridFunction<BFT, RT> function(
context, space, space,
surfaceNormalIndependentFunction(CubicFunction<RT>()));
CT absoluteError, relativeError;
estimateL2Error(
function, surfaceNormalIndependentFunction(CubicFunction<RT>()),
*quadStrategy, absoluteError, relativeError);
BOOST_CHECK_SMALL(relativeError, 1000 * std::numeric_limits<CT>::epsilon() /* percent */);
}
inline bool shouldUseBlasInQuadrature(const AssemblyOptions& assemblyOptions,
const Space<BasisFunctionType>& domain,
const Space<BasisFunctionType>& dualToRange)
{
return assemblyOptions.isBlasEnabledInQuadrature() == AssemblyOptions::YES ||
(assemblyOptions.isBlasEnabledInQuadrature() == AssemblyOptions::AUTO &&
(maximumShapesetOrder(domain) >= 2 ||
maximumShapesetOrder(dualToRange) >= 2));
}
BOOST_AUTO_TEST_CASE_TEMPLATE(aca_of_synthetic_maxwell_single_layer_operator_agrees_with_dense_assembly_in_asymmetric_case,
ValueType, complex_result_types)
{
typedef ValueType RT;
typedef typename ScalarTraits<ValueType>::RealType RealType;
typedef RealType BFT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "../../meshes/sphere-h-0.4.msh", false /* verbose */);
RT waveNumber = initWaveNumber<RT>();
shared_ptr<Space<BFT> > vectorPwiseLinears(
new RaviartThomas0VectorSpace<BFT>(grid));
shared_ptr<Space<BFT> > vectorPwiseLinears2(
new RaviartThomas0VectorSpace<BFT>(grid));
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(2);
accuracyOptions.singleRegular.setRelativeQuadratureOrder(2);
shared_ptr<NumericalQuadratureStrategy<BFT, RT> > quadStrategy(
new NumericalQuadratureStrategy<BFT, RT>(accuracyOptions));
AssemblyOptions assemblyOptionsDense;
assemblyOptionsDense.setVerbosityLevel(VerbosityLevel::LOW);
shared_ptr<Context<BFT, RT> > contextDense(
new Context<BFT, RT>(quadStrategy, assemblyOptionsDense));
BoundaryOperator<BFT, RT> opDense =
maxwell3dSingleLayerBoundaryOperator<BFT>(
contextDense,
vectorPwiseLinears, vectorPwiseLinears, vectorPwiseLinears,
waveNumber);
arma::Mat<RT> weakFormDense = opDense.weakForm()->asMatrix();
AssemblyOptions assemblyOptionsAca;
assemblyOptionsAca.setVerbosityLevel(VerbosityLevel::LOW);
AcaOptions acaOptions;
acaOptions.mode = AcaOptions::LOCAL_ASSEMBLY;
assemblyOptionsAca.switchToAcaMode(acaOptions);
shared_ptr<Context<BFT, RT> > contextAca(
new Context<BFT, RT>(quadStrategy, assemblyOptionsAca));
// Internal domain different from dualToRange
BoundaryOperator<BFT, RT> opAca =
maxwell3dSingleLayerBoundaryOperator<BFT>(
contextAca,
vectorPwiseLinears, vectorPwiseLinears, vectorPwiseLinears2,
waveNumber);
arma::Mat<RT> weakFormAca = opAca.weakForm()->asMatrix();
BOOST_CHECK(check_arrays_are_close<ValueType>(
weakFormDense, weakFormAca, 2. * acaOptions.eps));
}
BOOST_AUTO_TEST_CASE_TEMPLATE(interpolated_matches_noniterpolated,
BasisFunctionType, basis_function_types)
{
typedef BasisFunctionType BFT;
typedef typename Fiber::ScalarTraits<BFT>::ComplexType RT;
typedef typename Fiber::ScalarTraits<BFT>::ComplexType KT;
typedef typename Fiber::ScalarTraits<BFT>::RealType CT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "meshes/two_disjoint_triangles.msh",
false /* verbose */);
PiecewiseLinearContinuousScalarSpace<BFT> pwiseLinears(grid);
PiecewiseConstantScalarSpace<BFT> pwiseConstants(grid);
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setAbsoluteQuadratureOrder(5);
accuracyOptions.doubleSingular.setAbsoluteQuadratureOrder(5);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
const KT waveNumber(3.23, 0.31);
BoundaryOperator<BFT, RT> opNoninterpolated =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, KT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
waveNumber,
"", NO_SYMMETRY,
false);
BoundaryOperator<BFT, RT> opInterpolated =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, KT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
waveNumber,
"", NO_SYMMETRY,
true);
arma::Mat<RT> matNoninterpolated = opNoninterpolated.weakForm()->asMatrix();
arma::Mat<RT> matInterpolated = opInterpolated.weakForm()->asMatrix();
const CT eps = std::numeric_limits<CT>::epsilon();
BOOST_CHECK(check_arrays_are_close<RT>(
matNoninterpolated, matInterpolated, 100 * eps));
}
inline bool
shouldUseBlasInQuadrature(const AssemblyOptions &assemblyOptions,
const Space<BasisFunctionType> &domain,
const Space<BasisFunctionType> &dualToRange) {
// Disabled as BLAS quadrature causes crashes in the hypersingular operator for
// unknown reasons.
return assemblyOptions.isBlasEnabledInQuadrature() == AssemblyOptions::YES ||
(assemblyOptions.isBlasEnabledInQuadrature() ==
AssemblyOptions::AUTO &&
(maximumShapesetOrder(domain) >= 2 ||
maximumShapesetOrder(dualToRange) >= 2));
}
BOOST_AUTO_TEST_CASE_TEMPLATE(aca_of_synthetic_modified_helmholtz_hypersingular_operator_agrees_with_dense_assembly_in_symmetric_case,
ValueType, result_types)
{
typedef ValueType RT;
typedef typename ScalarTraits<ValueType>::RealType RealType;
typedef RealType BFT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "../../meshes/sphere-h-0.4.msh", false /* verbose */);
RT waveNumber = initWaveNumber<RT>();
shared_ptr<Space<BFT> > pwiseConstants(
new PiecewiseConstantScalarSpace<BFT>(grid));
shared_ptr<Space<BFT> > pwiseLinears(
new PiecewiseLinearContinuousScalarSpace<BFT>(grid));
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(2);
accuracyOptions.singleRegular.setRelativeQuadratureOrder(2);
shared_ptr<NumericalQuadratureStrategy<BFT, RT> > quadStrategy(
new NumericalQuadratureStrategy<BFT, RT>(accuracyOptions));
AssemblyOptions assemblyOptionsDense;
assemblyOptionsDense.setVerbosityLevel(VerbosityLevel::LOW);
shared_ptr<Context<BFT, RT> > contextDense(
new Context<BFT, RT>(quadStrategy, assemblyOptionsDense));
BoundaryOperator<BFT, RT> opDense =
modifiedHelmholtz3dHypersingularBoundaryOperator<BFT, RT, RT>(
contextDense, pwiseLinears, pwiseConstants, pwiseLinears,
waveNumber);
arma::Mat<RT> weakFormDense = opDense.weakForm()->asMatrix();
AssemblyOptions assemblyOptionsAca;
assemblyOptionsAca.setVerbosityLevel(VerbosityLevel::LOW);
AcaOptions acaOptions;
acaOptions.mode = AcaOptions::LOCAL_ASSEMBLY;
assemblyOptionsAca.switchToAcaMode(acaOptions);
shared_ptr<Context<BFT, RT> > contextAca(
new Context<BFT, RT>(quadStrategy, assemblyOptionsAca));
BoundaryOperator<BFT, RT> opAca =
modifiedHelmholtz3dHypersingularBoundaryOperator<BFT, RT, RT>(
contextAca, pwiseLinears, pwiseConstants, pwiseLinears,
waveNumber);
arma::Mat<RT> weakFormAca = opAca.weakForm()->asMatrix();
BOOST_CHECK(check_arrays_are_close<ValueType>(
weakFormDense, weakFormAca, 2. * acaOptions.eps));
}
void
AbstractBoundaryOperator<BasisFunctionType, ResultType>::
collectOptionsDependentDataForAssemblerConstruction(
const AssemblyOptions& options,
const shared_ptr<Fiber::RawGridGeometry<CoordinateType> >& testRawGeometry,
const shared_ptr<Fiber::RawGridGeometry<CoordinateType> >& trialRawGeometry,
shared_ptr<Fiber::OpenClHandler>& openClHandler,
bool& cacheSingularIntegrals) const
{
typedef LocalAssemblerConstructionHelper Helper;
Helper::makeOpenClHandler(options.parallelizationOptions().openClOptions(),
testRawGeometry, trialRawGeometry, openClHandler);
cacheSingularIntegrals = options.isSingularIntegralCachingEnabled();
}
std::unique_ptr<typename ElementaryLocalOperator<BasisFunctionType,
ResultType>::LocalAssembler>
ElementaryLocalOperator<BasisFunctionType, ResultType>::makeAssembler(
const QuadratureStrategy &quadStrategy,
const AssemblyOptions &options) const {
typedef Fiber::RawGridGeometry<CoordinateType> RawGridGeometry;
typedef std::vector<const Fiber::Shapeset<BasisFunctionType> *>
ShapesetPtrVector;
const bool verbose = (options.verbosityLevel() >= VerbosityLevel::DEFAULT);
shared_ptr<RawGridGeometry> testRawGeometry, trialRawGeometry;
shared_ptr<GeometryFactory> testGeometryFactory, trialGeometryFactory;
shared_ptr<Fiber::OpenClHandler> openClHandler;
shared_ptr<ShapesetPtrVector> testShapesets, trialShapesets;
bool cacheSingularIntegrals;
if (verbose)
std::cout << "Collecting data for assembler construction..." << std::endl;
this->collectDataForAssemblerConstruction(
options, testRawGeometry, trialRawGeometry, testGeometryFactory,
trialGeometryFactory, testShapesets, trialShapesets, openClHandler,
cacheSingularIntegrals);
if (verbose)
std::cout << "Data collection finished." << std::endl;
assert(testRawGeometry == trialRawGeometry);
assert(testGeometryFactory == trialGeometryFactory);
return quadStrategy.makeAssemblerForLocalOperators(
testGeometryFactory, testRawGeometry, testShapesets, trialShapesets,
make_shared_from_ref(testTransformations()),
make_shared_from_ref(trialTransformations()),
make_shared_from_ref(integral()), openClHandler);
}
std::pair<
shared_ptr<typename HypersingularIntegralOperator<
BasisFunctionType, KernelType, ResultType>::LocalAssembler>,
shared_ptr<typename HypersingularIntegralOperator<
BasisFunctionType, KernelType, ResultType>::LocalAssembler>
>
HypersingularIntegralOperator<BasisFunctionType, KernelType, ResultType>::makeAssemblers(
const QuadratureStrategy& quadStrategy,
const AssemblyOptions& options) const
{
typedef Fiber::RawGridGeometry<CoordinateType> RawGridGeometry;
typedef std::vector<const Fiber::Shapeset<BasisFunctionType>*> ShapesetPtrVector;
const bool verbose = (options.verbosityLevel() >= VerbosityLevel::DEFAULT);
shared_ptr<RawGridGeometry> testRawGeometry, trialRawGeometry;
shared_ptr<GeometryFactory> testGeometryFactory, trialGeometryFactory;
shared_ptr<Fiber::OpenClHandler> openClHandler;
shared_ptr<ShapesetPtrVector> testShapesets, trialShapesets;
bool cacheSingularIntegrals;
if (verbose)
std::cout << "Collecting data for assembler construction..." << std::endl;
this->collectDataForAssemblerConstruction(options,
testRawGeometry, trialRawGeometry,
testGeometryFactory, trialGeometryFactory,
testShapesets, trialShapesets,
openClHandler, cacheSingularIntegrals);
if (verbose)
std::cout << "Data collection finished." << std::endl;
bool makeSeparateOffDiagonalAssembler =
options.assemblyMode() == AssemblyOptions::ACA &&
options.acaOptions().mode == AcaOptions::HYBRID_ASSEMBLY;
return reallyMakeAssemblers(quadStrategy,
testGeometryFactory, trialGeometryFactory,
testRawGeometry, trialRawGeometry,
testShapesets, trialShapesets, openClHandler,
options.parallelizationOptions(),
options.verbosityLevel(),
cacheSingularIntegrals,
makeSeparateOffDiagonalAssembler);
}
DefaultLocalAssemblerForIntegralOperatorsOnSurfacesManager(
bool cacheSingularIntegrals)
{
// Create a Bempp grid
shared_ptr<Grid> grid = createGrid();
// Create context
Fiber::AccuracyOptions options;
options.doubleRegular.setRelativeQuadratureOrder(1);
quadStrategy.reset(new QuadratureStrategy);
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
assemblyOptions.enableSingularIntegralCaching(cacheSingularIntegrals);
Context<BFT, RT> context(quadStrategy, assemblyOptions);
// These important thing is that the domain and dualToRange spaces are
// different
piecewiseConstantSpace.reset(new PiecewiseConstantSpace(grid));
piecewiseLinearSpace.reset(new PiecewiseLinearSpace(grid));
bop = laplace3dSingleLayerBoundaryOperator<BFT, RT>(
make_shared_from_ref(context),
piecewiseConstantSpace,
piecewiseLinearSpace,
piecewiseLinearSpace,
"SLP");
const Operator& op = static_cast<const Operator&>(*bop.abstractOperator());
// This would be more elegant than the above, but it doesn't
// work on Mac because of a problem with RTTI across
// shared-library boundaries.
// op = boost::dynamic_pointer_cast<const Operator>(bop.abstractOperator());
// Construct local assembler
assembler = op.makeAssembler(*quadStrategy, assemblyOptions);
}
std::unique_ptr<DiscreteBoundaryOperator<ResultType>>
ElementaryLocalOperator<BasisFunctionType, ResultType>::
assembleWeakFormInSparseMode(LocalAssembler &assembler,
const AssemblyOptions &options) const {
#ifdef WITH_TRILINOS
if (boost::is_complex<BasisFunctionType>::value)
throw std::runtime_error(
"ElementaryLocalOperator::assembleWeakFormInSparseMode(): "
"sparse-mode assembly of identity operators for "
"complex-valued basis functions is not supported yet");
const Space<BasisFunctionType> &testSpace = *this->dualToRange();
const Space<BasisFunctionType> &trialSpace = *this->domain();
// Fill local submatrices
const GridView &view = testSpace.gridView();
const size_t elementCount = view.entityCount(0);
std::vector<int> elementIndices(elementCount);
for (size_t i = 0; i < elementCount; ++i)
elementIndices[i] = i;
std::vector<arma::Mat<ResultType>> localResult;
assembler.evaluateLocalWeakForms(elementIndices, localResult);
// Global DOF indices corresponding to local DOFs on elements
std::vector<std::vector<GlobalDofIndex>> testGdofs(elementCount);
std::vector<std::vector<GlobalDofIndex>> trialGdofs(elementCount);
std::vector<std::vector<BasisFunctionType>> testLdofWeights(elementCount);
std::vector<std::vector<BasisFunctionType>> trialLdofWeights(elementCount);
gatherGlobalDofs(testSpace, trialSpace, testGdofs, trialGdofs,
testLdofWeights, trialLdofWeights);
// Multiply matrix entries by DOF weights
for (size_t e = 0; e < elementCount; ++e)
for (size_t trialDof = 0; trialDof < trialGdofs[e].size(); ++trialDof)
for (size_t testDof = 0; testDof < testGdofs[e].size(); ++testDof)
localResult[e](testDof, trialDof) *=
conj(testLdofWeights[e][testDof]) * trialLdofWeights[e][trialDof];
// Estimate number of entries in each row
// This will be useful when we begin to use MPI
// // Get global DOF indices for which this process is responsible
// const int testGlobalDofCount = testSpace.globalDofCount();
// Epetra_Map rowMap(testGlobalDofCount, 0 /* index-base */, comm);
// std::vector<int> myTestGlobalDofs(rowMap.MyGlobalElements(),
// rowMap.MyGlobalElements() +
// rowMap.NumMyElements());
// const int myTestGlobalDofCount = myTestGlobalDofs.size();
const int testGlobalDofCount = testSpace.globalDofCount();
const int trialGlobalDofCount = trialSpace.globalDofCount();
arma::Col<int> nonzeroEntryCountEstimates(testGlobalDofCount);
nonzeroEntryCountEstimates.fill(0);
// Upper estimate for the number of global trial DOFs coupled to a given
// global test DOF: sum of the local trial DOF counts for each element that
// contributes to the global test DOF in question
for (size_t e = 0; e < elementCount; ++e)
for (size_t testLdof = 0; testLdof < testGdofs[e].size(); ++testLdof) {
int testGdof = testGdofs[e][testLdof];
if (testGdof >= 0)
nonzeroEntryCountEstimates(testGdof) += trialGdofs[e].size();
}
Epetra_SerialComm comm; // To be replaced once we begin to use MPI
Epetra_LocalMap rowMap(testGlobalDofCount, 0 /* index_base */, comm);
Epetra_LocalMap colMap(trialGlobalDofCount, 0 /* index_base */, comm);
shared_ptr<Epetra_FECrsMatrix> result =
boost::make_shared<Epetra_FECrsMatrix>(
Copy, rowMap, colMap, nonzeroEntryCountEstimates.memptr());
// TODO: make each process responsible for a subset of elements
// Find maximum number of local dofs per element
size_t maxLdofCount = 0;
for (size_t e = 0; e < elementCount; ++e)
maxLdofCount =
std::max(maxLdofCount, testGdofs[e].size() * trialGdofs[e].size());
// Initialise sparse matrix with zeros at required positions
arma::Col<double> zeros(maxLdofCount);
zeros.fill(0.);
for (size_t e = 0; e < elementCount; ++e)
result->InsertGlobalValues(testGdofs[e].size(), &testGdofs[e][0],
trialGdofs[e].size(), &trialGdofs[e][0],
zeros.memptr());
// Add contributions from individual elements
for (size_t e = 0; e < elementCount; ++e)
epetraSumIntoGlobalValues(*result, testGdofs[e], trialGdofs[e],
localResult[e]);
result->GlobalAssemble();
// If assembly mode is equal to ACA and we have AHMED,
// construct the block cluster tree. Otherwise leave it uninitialized.
typedef ClusterConstructionHelper<BasisFunctionType> CCH;
typedef AhmedDofWrapper<CoordinateType> AhmedDofType;
typedef ExtendedBemCluster<AhmedDofType> AhmedBemCluster;
typedef bbxbemblcluster<AhmedDofType, AhmedDofType> AhmedBemBlcluster;
shared_ptr<AhmedBemBlcluster> blockCluster;
shared_ptr<IndexPermutation> test_o2pPermutation, test_p2oPermutation;
shared_ptr<IndexPermutation> trial_o2pPermutation, trial_p2oPermutation;
#ifdef WITH_AHMED
if (options.assemblyMode() == AssemblyOptions::ACA) {
const AcaOptions &acaOptions = options.acaOptions();
bool indexWithGlobalDofs = acaOptions.mode != AcaOptions::HYBRID_ASSEMBLY;
typedef ClusterConstructionHelper<BasisFunctionType> CCH;
shared_ptr<AhmedBemCluster> testClusterTree;
CCH::constructBemCluster(testSpace, indexWithGlobalDofs, acaOptions,
testClusterTree, test_o2pPermutation,
test_p2oPermutation);
// TODO: construct a hermitian H-matrix if possible
shared_ptr<AhmedBemCluster> trialClusterTree;
CCH::constructBemCluster(trialSpace, indexWithGlobalDofs, acaOptions,
trialClusterTree, trial_o2pPermutation,
trial_p2oPermutation);
unsigned int blockCount = 0;
bool useStrongAdmissibilityCondition = !indexWithGlobalDofs;
blockCluster.reset(CCH::constructBemBlockCluster(
acaOptions, false /* hermitian */, *testClusterTree, *trialClusterTree,
useStrongAdmissibilityCondition, blockCount).release());
}
#endif
// Create and return a discrete operator represented by the matrix that
// has just been calculated
return std::unique_ptr<DiscreteBoundaryOperator<ResultType>>(
new DiscreteSparseBoundaryOperator<ResultType>(
result, this->symmetry(), NO_TRANSPOSE, blockCluster,
trial_o2pPermutation, test_o2pPermutation));
#else // WITH_TRILINOS
throw std::runtime_error(
"ElementaryLocalOperator::assembleWeakFormInSparseMode(): "
"To enable assembly in sparse mode, recompile BEM++ "
"with the symbol WITH_TRILINOS defined.");
#endif
}
int main(int argc, char* argv[])
{
// Physical parameters, general
const BFT c0 = 0.3; // speed of light in vacuum [mm/ps]
BFT refind = 1.4; // refractive index
BFT alpha = A_Keijzer(refind); // boundary term
BFT c = c0/refind; // speed of light in medium [mm/ps]
BFT freq = 100*1e6; // modulation frequency [Hz]
BFT omega = 2.0*M_PI * freq*1e-12; // modulation frequency [cycles/ps]
// Physical parameters, outer region
BFT mua1 = 0.01; // absorption coefficient
BFT mus1 = 1.0; // scattering coefficient
BFT kappa1 = 1.0/(3.0*(mua1+mus1)); // diffusion coefficient
RT waveNumber1 = sqrt (RT(mua1/kappa1, omega/(c*kappa1))); // outer region
// Physical parameters, inner region
BFT mua2 = 0.02; // absorption coefficient
BFT mus2 = 0.5; // scattering coefficient
BFT kappa2 = 1.0/(3.0*(mua2+mus2)); // diffusion coefficient
RT waveNumber2 = sqrt (RT(mua2/kappa2, omega/(c*kappa2))); // outer region
// Create sphere meshes on the fly
shared_ptr<Grid> grid1 = CreateSphere(25.0, 1.0);
shared_ptr<Grid> grid2 = CreateSphere(15.0, 1.0);
// Initialize the spaces
PiecewiseLinearContinuousScalarSpace<BFT> HplusHalfSpace1(grid1);
PiecewiseLinearContinuousScalarSpace<BFT> HplusHalfSpace2(grid2);
// Define some default options.
AssemblyOptions assemblyOptions;
// We want to use ACA
AcaOptions acaOptions; // Default parameters for ACA
acaOptions.eps = 1e-5;
assemblyOptions.switchToAcaMode(acaOptions);
// Define the standard integration factory
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(2);
accuracyOptions.singleRegular.setRelativeQuadratureOrder(1);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
// We need the single layer, double layer, and the identity operator
// mesh1 x mesh1
BoundaryOperator<BFT, RT> slp11 =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace1),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1), waveNumber1);
BoundaryOperator<BFT, RT> dlp11 =
modifiedHelmholtz3dDoubleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace1),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1), waveNumber1);
BoundaryOperator<BFT, RT> id11 =
identityOperator<BFT, RT>(
SHARED(context), SHARED(HplusHalfSpace1),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1));
// mesh2 x mesh2, wavenumber 1
BoundaryOperator<BFT, RT> slp22_w1 =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber1);
BoundaryOperator<BFT, RT> dlp22_w1 =
modifiedHelmholtz3dDoubleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber1);
BoundaryOperator<BFT, RT> id22 =
identityOperator<BFT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2));
// mesh2 x mesh2, wavenumber 2
BoundaryOperator<BFT, RT> slp22_w2 =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber2);
BoundaryOperator<BFT, RT> dlp22_w2 =
modifiedHelmholtz3dDoubleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber2);
// mesh1 x mesh2
BoundaryOperator<BFT, RT> slp12 =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1), waveNumber1);
BoundaryOperator<BFT, RT> dlp12 =
modifiedHelmholtz3dDoubleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace2),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1), waveNumber1);
// mesh2 x mesh1
BoundaryOperator<BFT, RT> slp21 =
modifiedHelmholtz3dSingleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace1),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber1);
BoundaryOperator<BFT, RT> dlp21 =
modifiedHelmholtz3dDoubleLayerBoundaryOperator<BFT, RT, RT>(
SHARED(context), SHARED(HplusHalfSpace1),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2), waveNumber1);
BFT scale = 1.0/(2.0*alpha*kappa1);
BoundaryOperator<BFT, RT> lhs_k11 = 0.5*id11 + dlp11 + scale*slp11;
BoundaryOperator<BFT, RT> lhs_k12 = -1.0*dlp12; // sign flipped to accommodate normal direction
BoundaryOperator<BFT, RT> lhs_k13 = -(1.0/kappa1)*slp12;
BoundaryOperator<BFT, RT> lhs_k21 = dlp21 + scale*slp21;
BoundaryOperator<BFT, RT> lhs_k22 = 0.5*id22 - dlp22_w1; // sign flipped to accommodate normal direction
BoundaryOperator<BFT, RT> lhs_k23 = -(1.0/kappa1)*slp22_w1;
// BoundaryOperator<BFT, RT> lhs_k31 -- empty
BoundaryOperator<BFT, RT> lhs_k32 = 0.5*id22 + dlp22_w2;
BoundaryOperator<BFT, RT> lhs_k33 = (1.0/kappa2) * slp22_w2;
BlockedOperatorStructure<BFT, RT> structure;
structure.setBlock(0, 0, lhs_k11);
structure.setBlock(0, 1, lhs_k12);
structure.setBlock(0, 2, lhs_k13);
structure.setBlock(1, 0, lhs_k21);
structure.setBlock(1, 1, lhs_k22);
structure.setBlock(1, 2, lhs_k23);
// structure.setBlock(2, 0, ...); -- empty
structure.setBlock(2, 1, lhs_k32);
structure.setBlock(2, 2, lhs_k33);
BlockedBoundaryOperator<BFT, RT> blockedOp(structure);
// Grid functions for the RHS
// TODO: remove the necessity of creating "dummy" functions
// corresponding to zero blocks.
BoundaryOperator<BFT, RT> rhs1 = scale*slp11;
BoundaryOperator<BFT, RT> rhs2 = scale*slp21;
std::vector<GridFunction<BFT, RT> > blockedRhs(3);
blockedRhs[0] = rhs1 * GridFunction<BFT, RT>(
SHARED(context),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1),
//surfaceNormalIndependentFunction(NullFunctor()));
surfaceNormalIndependentFunction(MyFunctor(waveNumber1)));
blockedRhs[1] = rhs2 * GridFunction<BFT, RT>(
SHARED(context),
SHARED(HplusHalfSpace1), SHARED(HplusHalfSpace1),
//surfaceNormalIndependentFunction(NullFunctor()));
surfaceNormalIndependentFunction(MyFunctor(waveNumber1)));
blockedRhs[2] = GridFunction<BFT, RT>(
SHARED(context),
SHARED(HplusHalfSpace2), SHARED(HplusHalfSpace2),
//surfaceNormalIndependentFunction(MyFunctor(waveNumber2)));
surfaceNormalIndependentFunction(NullFunctor()));
// Initialize the solver
const double solverTol = 1e-10;
DefaultIterativeSolver<BFT, RT> solver(blockedOp);
solver.initializeSolver(defaultGmresParameterList(solverTol));
// Solve
BlockedSolution<BFT, RT> solution = solver.solve(blockedRhs);
std::cout << solution.solverMessage() << std::endl;
arma::Col<RT> solutionVectorBlock1 = solution.gridFunction(0).coefficients();
arma::Col<RT> solutionVectorBlock2 = solution.gridFunction(1).coefficients();
arma::Col<RT> solutionVectorBlock3 = solution.gridFunction(2).coefficients();
arma::diskio::save_raw_ascii(solutionVectorBlock1, "sol1.txt");
arma::diskio::save_raw_ascii(solutionVectorBlock2, "sol2.txt");
arma::diskio::save_raw_ascii(solutionVectorBlock3, "sol3.txt");
solution.gridFunction(0).exportToVtk(VtkWriter::VERTEX_DATA, "gf1", "gf1");
solution.gridFunction(1).exportToVtk(VtkWriter::VERTEX_DATA, "gf2", "gf2");
solution.gridFunction(2).exportToVtk(VtkWriter::VERTEX_DATA, "gf3", "gf3");
}
int main(int argc, char* argv[])
{
// Load mesh
if (argc != 2) {
std::cout << "Solve a Dirichlet problem for the Laplace equation.\n"
"Usage: " << argv[0] << " <mesh_file>" << std::endl;
return 1;
}
shared_ptr<Grid> grid = loadTriangularMeshFromFile(argv[1]);
//std::cout << grid->gridTopology() << std::endl;
// Initialize the spaces
PiecewiseLinearContinuousScalarSpace<BFT> HplusHalfSpace(grid);
PiecewiseConstantScalarSpace<BFT> HminusHalfSpace(grid);
// Define some default options.
AssemblyOptions assemblyOptions;
// We want to use ACA
AcaOptions acaOptions; // Default parameters for ACA
acaOptions.eps = 1e-5;
assemblyOptions.switchToAcaMode(acaOptions);
// Define the standard integration factory
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(1);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
// We need the single layer, double layer, and the identity operator
BoundaryOperator<BFT, RT> slpOp = laplace3dSingleLayerBoundaryOperator<BFT, RT >(
make_shared_from_ref(context),
make_shared_from_ref(HminusHalfSpace),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HminusHalfSpace),
"SLP");
BoundaryOperator<BFT, RT> dlpOp = laplace3dDoubleLayerBoundaryOperator<BFT, RT >(
make_shared_from_ref(context),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HminusHalfSpace),
"DLP");
BoundaryOperator<BFT, RT> id = identityOperator<BFT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HminusHalfSpace),
"I");
// Form the right-hand side sum
BoundaryOperator<BFT, RT> rhsOp = -0.5 * id + dlpOp;
// We also want a grid function
GridFunction<BFT, RT> u(
make_shared_from_ref(context),
make_shared_from_ref(HplusHalfSpace),
make_shared_from_ref(HplusHalfSpace), // is this the right choice?
surfaceNormalIndependentFunction(MyFunctor()));
// Assemble the rhs
std::cout << "Assemble rhs" << std::endl;
GridFunction<BFT, RT> rhs = rhsOp * u;
// Initialize the solver
std::cout << "Initialize solver" << std::endl;
#ifdef WITH_TRILINOS
DefaultIterativeSolver<BFT, RT> solver(slpOp,ConvergenceTestMode::TEST_CONVERGENCE_IN_DUAL_TO_RANGE);
solver.initializeSolver(defaultGmresParameterList(1e-5));
Solution<BFT, RT> solution = solver.solve(rhs);
std::cout << solution.solverMessage() << std::endl;
#else
DefaultDirectSolver<BFT, RT> solver(slp, rhs);
solver.solve();
#endif
// Extract the solution
const GridFunction<BFT, RT>& solFun = solution.gridFunction();
// Write out as VTK
solFun.exportToVtk(VtkWriter::CELL_DATA, "Neumann_data",
"calculated_neumann_data_cell");
solFun.exportToVtk(VtkWriter::VERTEX_DATA, "Neumann_data",
"calculated_neumann_data_vertex");
// Uncomment the block below if you are solving the problem on a sphere and
// you want to compare the numerical and analytical solution.
// arma::Col<RT> solutionCoefficients = solFun.coefficients();
// std::cout << solutionCoefficients << std::endl;
// arma::Col<RT> deviation = solutionCoefficients - static_cast<RT>(-1.);
// // % in Armadillo -> elementwise multiplication
// RT stdDev = sqrt(arma::accu(deviation % deviation) /
// static_cast<RT>(solutionCoefficients.n_rows));
// std::cout << "Standard deviation: " << stdDev << std::endl;
}
BOOST_AUTO_TEST_CASE_TEMPLATE(works, BasisFunctionType, basis_function_types)
{
typedef BasisFunctionType BFT;
typedef typename Fiber::ScalarTraits<BFT>::ComplexType RT;
typedef typename Fiber::ScalarTraits<BFT>::RealType CT;
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(
params, "meshes/two_disjoint_triangles.msh",
false /* verbose */);
PiecewiseLinearContinuousScalarSpace<BFT> pwiseLinears(grid);
PiecewiseConstantScalarSpace<BFT> pwiseConstants(grid);
AssemblyOptions assemblyOptions;
assemblyOptions.setVerbosityLevel(VerbosityLevel::LOW);
AccuracyOptions accuracyOptions;
accuracyOptions.doubleRegular.setAbsoluteQuadratureOrder(5);
accuracyOptions.doubleSingular.setAbsoluteQuadratureOrder(5);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
const RT waveNumber(1.23, 0.31);
BoundaryOperator<BFT, RT> slpOpConstants = Bempp::helmholtz3dSingleLayerBoundaryOperator<BFT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseConstants),
make_shared_from_ref(pwiseConstants),
make_shared_from_ref(pwiseConstants),
waveNumber);
BoundaryOperator<BFT, RT> slpOpLinears = helmholtz3dSingleLayerBoundaryOperator<BFT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
waveNumber);
BoundaryOperator<BFT, RT> hypOp = helmholtz3dHypersingularBoundaryOperator<BFT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
waveNumber);
// Get the matrix repr. of the hypersingular operator
arma::Mat<RT> hypMat = hypOp.weakForm()->asMatrix();
// Construct the expected hypersingular operator matrix. For this, we need:
// * the surface curls of all basis functions (which are constant)
typedef Fiber::SurfaceCurl3dElementaryFunctor<CT> ElementaryFunctor;
typedef Fiber::ElementaryBasisTransformationFunctorWrapper<ElementaryFunctor> Functor;
Functor functor;
size_t basisDeps = 0, geomDeps = 0;
functor.addDependencies(basisDeps, geomDeps);
arma::Mat<CT> points(2, 1);
points.fill(0.);
typedef Fiber::PiecewiseLinearContinuousScalarBasis<3, BFT> Basis;
Basis basis;
Fiber::BasisData<BFT> basisData;
basis.evaluate(basisDeps, points, Fiber::ALL_DOFS, basisData);
Fiber::GeometricalData<CT> geomData[2];
std::unique_ptr<GridView> view = grid->leafView();
std::unique_ptr<EntityIterator<0> > it = view->entityIterator<0>();
it->entity().geometry().getData(geomDeps, points, geomData[0]);
it->next();
it->entity().geometry().getData(geomDeps, points, geomData[1]);
Fiber::DefaultCollectionOfBasisTransformations<Functor> transformations(functor);
Fiber::CollectionOf3dArrays<BFT> surfaceCurl[2];
transformations.evaluate(basisData, geomData[0], surfaceCurl[0]);
transformations.evaluate(basisData, geomData[1], surfaceCurl[1]);
// * the single-layer potential matrix for constant basis functions
arma::Mat<RT> slpMatConstants = slpOpConstants.weakForm()->asMatrix();
// * the single-layer potential matrix for linear basis functions
arma::Mat<RT> slpMatLinears = slpOpLinears.weakForm()->asMatrix();
arma::Mat<RT> expectedHypMat(6, 6);
for (size_t testElement = 0; testElement < 2; ++testElement)
for (size_t trialElement = 0; trialElement < 2; ++trialElement)
for (size_t r = 0; r < 3; ++r)
for (size_t c = 0; c < 3; ++c) {
RT curlMultiplier = 0.;
for (size_t dim = 0; dim < 3; ++dim)
curlMultiplier += surfaceCurl[testElement][0](dim, r, 0) *
surfaceCurl[trialElement][0](dim, c, 0);
RT valueMultiplier = 0.;
for (size_t dim = 0; dim < 3; ++dim)
valueMultiplier += geomData[testElement].normals(dim, 0) *
geomData[trialElement].normals(dim, 0);
expectedHypMat(3 * testElement + r, 3 * trialElement + c) =
curlMultiplier * slpMatConstants(testElement, trialElement) -
waveNumber * waveNumber * valueMultiplier *
slpMatLinears(3 * testElement + r, 3 * trialElement + c);
}
BOOST_CHECK(check_arrays_are_close<RT>(expectedHypMat, hypMat, 1e-6));
}
int main(int argc, char* argv[])
{
// Process command-line args
if (argc < 7 || argc % 2 != 1) {
std::cout << "Solve a Maxwell Dirichlet problem in an exterior domain.\n"
<< "Usage: " << argv[0]
<< " <mesh_file> <n_threads> <aca_eps> <solver_tol>"
<< " <singular_order_increment>"
<< " [<regular_order_increment_1> <min_relative_distance_1>]"
<< " [<regular_order_increment_2> <min_relative_distance_2>]"
<< " [...] <regular_order_increment_n>"
<< std::endl;
return 1;
}
int maxThreadCount = atoi(argv[2]);
double acaEps = atof(argv[3]);
double solverTol = atof(argv[4]);
int singOrderIncrement = atoi(argv[5]);
if (acaEps > 1. || acaEps < 0.) {
std::cout << "Invalid aca_eps: " << acaEps << std::endl;
return 1;
}
if (solverTol > 1. || solverTol < 0.) {
std::cout << "Invalid solver_tol: " << solverTol << std::endl;
return 1;
}
AccuracyOptionsEx accuracyOptions;
std::vector<double> maxNormDists;
std::vector<int> orderIncrements;
for (int i = 6; i < argc - 1; i += 2) {
orderIncrements.push_back(atoi(argv[i]));
maxNormDists.push_back(atof(argv[i + 1]));
}
orderIncrements.push_back(atoi(argv[argc - 1]));
accuracyOptions.setDoubleRegular(maxNormDists, orderIncrements);
accuracyOptions.setDoubleSingular(singOrderIncrement);
accuracyOptions.setSingleRegular(2);
// Load mesh
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(params, argv[1]);
// Initialize the space
RaviartThomas0VectorSpace<BFT> HdivSpace(grid);
// Set assembly mode and options
AssemblyOptions assemblyOptions;
assemblyOptions.setMaxThreadCount(maxThreadCount);
if (acaEps > 0.) {
AcaOptions acaOptions;
acaOptions.eps = acaEps;
assemblyOptions.switchToAcaMode(acaOptions);
}
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
// Construct operators
BoundaryOperator<BFT, RT> slpOp = maxwell3dSingleLayerBoundaryOperator<BFT>(
make_shared_from_ref(context),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
k,
"SLP");
BoundaryOperator<BFT, RT> dlpOp = maxwell3dDoubleLayerBoundaryOperator<BFT>(
make_shared_from_ref(context),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
k,
"DLP");
BoundaryOperator<BFT, RT> idOp = maxwell3dIdentityOperator<BFT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
"Id");
// Construct a grid function representing the Dirichlet data
GridFunction<BFT, RT> dirichletData(
make_shared_from_ref(context),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
surfaceNormalDependentFunction(DirichletData()));
dirichletData.exportToVtk(VtkWriter::CELL_DATA, "Dirichlet_data",
"input_dirichlet_data_cell");
dirichletData.exportToVtk(VtkWriter::VERTEX_DATA, "Dirichlet_data",
"input_dirichlet_data_vertex");
// Construct a grid function representing the right-hand side
GridFunction<BFT, RT> rhs = -((0.5 * idOp + dlpOp) * dirichletData);
// Solve the equation
Solution<BFT, RT> solution;
#ifdef WITH_AHMED
if (solverTol > 0.) {
DefaultIterativeSolver<BFT, RT> solver(slpOp);
AcaApproximateLuInverse<RT> slpOpLu(
DiscreteAcaBoundaryOperator<RT>::castToAca(
*slpOp.weakForm()),
/* LU factorisation accuracy */ 0.01);
Preconditioner<RT> prec =
discreteOperatorToPreconditioner<RT>(
make_shared_from_ref(slpOpLu));
solver.initializeSolver(defaultGmresParameterList(solverTol, 10000), prec);
solution = solver.solve(rhs);
} else {
DefaultDirectSolver<BFT, RT> solver(slpOp);
solution = solver.solve(rhs);
}
#else // WITH_AHMED
DefaultDirectSolver<BFT, RT> solver(slpOp);
solution = solver.solve(rhs);
#endif
std::cout << solution.solverMessage() << std::endl;
// Extract the solution
const GridFunction<BFT, RT>& neumannData = solution.gridFunction();
neumannData.exportToVtk(VtkWriter::CELL_DATA, "Neumann_data",
"calculated_neumann_data_cell");
neumannData.exportToVtk(VtkWriter::VERTEX_DATA, "Neumann_data",
"calculated_neumann_data_vertex");
// Compare the solution against the analytical result
GridFunction<BFT, RT> exactNeumannData(
make_shared_from_ref(context),
make_shared_from_ref(HdivSpace),
make_shared_from_ref(HdivSpace),
surfaceNormalDependentFunction(ExactNeumannData()));
exactNeumannData.exportToVtk(VtkWriter::CELL_DATA, "Neumann_data",
"exact_neumann_data_cell");
exactNeumannData.exportToVtk(VtkWriter::VERTEX_DATA, "Neumann_data",
"exact_neumann_data_vertex");
EvaluationOptions evaluationOptions;
CT absoluteError = L2NormOfDifference(
neumannData, surfaceNormalDependentFunction(ExactNeumannData()),
quadStrategy, evaluationOptions);
CT exactSolNorm = L2NormOfDifference(
0. * neumannData, surfaceNormalDependentFunction(ExactNeumannData()),
quadStrategy, evaluationOptions);
std::cout << "Relative L^2 error: " << absoluteError / exactSolNorm
<< "\nAbsolute L^2 error: " << absoluteError << std::endl;
// Evaluate the solution at a few points
Maxwell3dSingleLayerPotentialOperator<BFT> slpPotOp(k);
Maxwell3dDoubleLayerPotentialOperator<BFT> dlpPotOp(k);
const int dimWorld = 3;
const int pointCount = 3;
arma::Mat<CT> points(dimWorld, pointCount * pointCount);
for (int i = 0; i < pointCount; ++i)
for (int j = 0; j < pointCount; ++j) {
points(0, i * pointCount + j) = 3. + i / CT(pointCount - 1);
points(1, i * pointCount + j) = 2. + j / CT(pointCount - 1);
points(2, i * pointCount + j) = 0.5;
}
arma::Mat<RT> slpContrib = slpPotOp.evaluateAtPoints(
neumannData, points, quadStrategy, evaluationOptions);
arma::Mat<RT> dlpContrib = dlpPotOp.evaluateAtPoints(
dirichletData, points, quadStrategy, evaluationOptions);
arma::Mat<RT> values = -slpContrib - dlpContrib;
// Evaluate the analytical solution at the same points
ExactSolution exactSolution;
arma::Mat<RT> exactValues(dimWorld, pointCount * pointCount);
for (int i = 0; i < pointCount * pointCount; ++i) {
arma::Col<RT> activeResultColumn = exactValues.unsafe_col(i);
exactSolution.evaluate(points.unsafe_col(i), activeResultColumn);
}
// Compare the numerical and analytical solutions
std::cout << "Numerical | analytical\n";
for (int i = 0; i < pointCount * pointCount; ++i)
std::cout << values(0, i) << " "
<< values(1, i) << " "
<< values(2, i) << " | "
<< exactValues(0, i) << " "
<< exactValues(1, i) << " "
<< exactValues(2, i) << "\n";
}
int main()
{
// Import symbols from namespace Bempp to the global namespace
using namespace Bempp;
// Load mesh
const char* meshFile = "meshes/sphere-h-0.2.msh";
GridParameters params;
params.topology = GridParameters::TRIANGULAR;
shared_ptr<Grid> grid = GridFactory::importGmshGrid(params, meshFile);
// Initialize the spaces
PiecewiseLinearContinuousScalarSpace<BFT> pwiseLinears(grid);
PiecewiseConstantScalarSpace<BFT> pwiseConstants(grid);
// Define the quadrature strategy
AccuracyOptions accuracyOptions;
// Increase by 2 the order of quadrature rule used to approximate
// integrals of regular functions on pairs on elements
accuracyOptions.doubleRegular.setRelativeQuadratureOrder(2);
// Increase by 2 the order of quadrature rule used to approximate
// integrals of regular functions on single elements
accuracyOptions.singleRegular.setRelativeQuadratureOrder(2);
NumericalQuadratureStrategy<BFT, RT> quadStrategy(accuracyOptions);
// Specify the assembly method. We want to use ACA
AssemblyOptions assemblyOptions;
AcaOptions acaOptions; // Default parameters for ACA
assemblyOptions.switchToAcaMode(acaOptions);
// Create the assembly context
Context<BFT, RT> context(make_shared_from_ref(quadStrategy), assemblyOptions);
// Construct elementary operators
BoundaryOperator<BFT, RT> slpOp =
laplace3dSingleLayerBoundaryOperator<BFT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseConstants),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseConstants));
BoundaryOperator<BFT, RT> dlpOp =
laplace3dDoubleLayerBoundaryOperator<BFT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseConstants));
BoundaryOperator<BFT, RT> idOp =
identityOperator<BFT, RT>(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseConstants));
// Form the right-hand side sum
BoundaryOperator<BFT, RT> rhsOp = -0.5 * idOp + dlpOp;
// Construct the grid function representing the (input) Dirichlet data
GridFunction<BFT, RT> dirichletData(
make_shared_from_ref(context),
make_shared_from_ref(pwiseLinears),
make_shared_from_ref(pwiseLinears),
surfaceNormalIndependentFunction(DirichletData()));
// Construct the right-hand-side grid function
GridFunction<BFT, RT> rhs = rhsOp * dirichletData;
// Initialize the solver
DefaultIterativeSolver<BFT, RT> solver(slpOp);
solver.initializeSolver(defaultGmresParameterList(1e-5));
// Solve the equation
Solution<BFT, RT> solution = solver.solve(rhs);
std::cout << solution.solverMessage() << std::endl;
// Extract the solution in the form of a grid function
// and export it in VTK format
const GridFunction<BFT, RT>& solFun = solution.gridFunction();
solFun.exportToVtk(VtkWriter::CELL_DATA, "Neumann_data", "solution");
// Compare the numerical and analytical solution on the grid
// GridFunction<BFT, RT> exactSolFun(
// make_shared_from_ref(context),
// make_shared_from_ref(pwiseConstants),
// make_shared_from_ref(pwiseConstants),
// surfaceNormalIndependentFunction(ExactNeumannData()));
CT absoluteError, relativeError;
estimateL2Error(
solFun, surfaceNormalIndependentFunction(ExactNeumannData()),
quadStrategy, absoluteError, relativeError);
std::cout << "Relative L^2 error: " << relativeError << std::endl;
// GridFunction<BFT, RT> diff = solFun - exactSolFun;
// double relativeError = diff.L2Norm() / exactSolFun.L2Norm();
// std::cout << "Relative L^2 error: " << relativeError << std::endl;
// Prepare to evaluate the solution on an annulus outside the sphere
// Create potential operators
Laplace3dSingleLayerPotentialOperator<BFT, RT> slPotOp;
Laplace3dDoubleLayerPotentialOperator<BFT, RT> dlPotOp;
// Construct the array 'evaluationPoints' containing the coordinates
// of points where the solution should be evaluated
const int rCount = 51;
const int thetaCount = 361;
const CT minTheta = 0., maxTheta = 2. * M_PI;
const CT minR = 1., maxR = 2.;
const int dimWorld = 3;
arma::Mat<CT> evaluationPoints(dimWorld, rCount * thetaCount);
for (int iTheta = 0; iTheta < thetaCount; ++iTheta) {
CT theta = minTheta + (maxTheta - minTheta) *
iTheta / (thetaCount - 1);
for (int iR = 0; iR < rCount; ++iR) {
CT r = minR + (maxR - minR) * iR / (rCount - 1);
evaluationPoints(0, iR + iTheta * rCount) = r * cos(theta); // x
evaluationPoints(1, iR + iTheta * rCount) = r * sin(theta); // y
evaluationPoints(2, iR + iTheta * rCount) = 0.; // z
}
}
// Use the Green's representation formula to evaluate the solution
EvaluationOptions evaluationOptions;
arma::Mat<RT> field =
-slPotOp.evaluateAtPoints(solFun, evaluationPoints,
quadStrategy, evaluationOptions) +
dlPotOp.evaluateAtPoints(dirichletData, evaluationPoints,
quadStrategy, evaluationOptions);
// Export the solution into text file
std::ofstream out("solution.txt");
out << "# x y z u\n";
for (int i = 0; i < rCount * thetaCount; ++i)
out << evaluationPoints(0, i) << ' '
<< evaluationPoints(1, i) << ' '
<< evaluationPoints(2, i) << ' '
<< field(0, i) << '\n';
}
std::auto_ptr<DiscreteBoundaryOperator<ResultType> >
AcaGlobalAssembler<BasisFunctionType, ResultType>::assembleDetachedWeakForm(
const Space<BasisFunctionType>& testSpace,
const Space<BasisFunctionType>& trialSpace,
const std::vector<LocalAssembler*>& localAssemblers,
const std::vector<const DiscreteBndOp*>& sparseTermsToAdd,
const std::vector<ResultType>& denseTermsMultipliers,
const std::vector<ResultType>& sparseTermsMultipliers,
const AssemblyOptions& options,
int symmetry)
{
#ifdef WITH_AHMED
typedef AhmedDofWrapper<CoordinateType> AhmedDofType;
typedef ExtendedBemCluster<AhmedDofType> AhmedBemCluster;
typedef bemblcluster<AhmedDofType, AhmedDofType> AhmedBemBlcluster;
typedef DiscreteAcaBoundaryOperator<ResultType> DiscreteAcaLinOp;
const AcaOptions& acaOptions = options.acaOptions();
const bool indexWithGlobalDofs = acaOptions.globalAssemblyBeforeCompression;
const bool verbosityAtLeastDefault =
(options.verbosityLevel() >= VerbosityLevel::DEFAULT);
const bool verbosityAtLeastHigh =
(options.verbosityLevel() >= VerbosityLevel::HIGH);
// Currently we don't support Hermitian ACA operators. This is because we
// don't have the means to really test them -- we would need complex-valued
// basis functions for that. (Assembly of such a matrix would be very easy
// -- just change complex_sym from true to false in the call to apprx_sym()
// in AcaWeakFormAssemblerLoopBody::operator() -- but operations on
// symmetric/Hermitian matrices are not always trivial and we do need to be
// able to test them properly.)
bool symmetric = symmetry & SYMMETRIC;
if (symmetry & HERMITIAN && !(symmetry & SYMMETRIC) &&
verbosityAtLeastDefault)
std::cout << "Warning: assembly of non-symmetric Hermitian H-matrices "
"is not supported yet. A general H-matrix will be assembled"
<< std::endl;
#ifndef WITH_TRILINOS
if (!indexWithGlobalDofs)
throw std::runtime_error("AcaGlobalAssembler::assembleDetachedWeakForm(): "
"ACA assembly with globalAssemblyBeforeCompression "
"set to false requires BEM++ to be linked with "
"Trilinos");
#endif // WITH_TRILINOS
const size_t testDofCount = indexWithGlobalDofs ?
testSpace.globalDofCount() : testSpace.flatLocalDofCount();
const size_t trialDofCount = indexWithGlobalDofs ?
trialSpace.globalDofCount() : trialSpace.flatLocalDofCount();
if (symmetric && testDofCount != trialDofCount)
throw std::invalid_argument("AcaGlobalAssembler::assembleDetachedWeakForm(): "
"you cannot generate a symmetric weak form "
"using test and trial spaces with different "
"numbers of DOFs");
// o2p: map of original indices to permuted indices
// p2o: map of permuted indices to original indices
typedef ClusterConstructionHelper<BasisFunctionType> CCH;
shared_ptr<AhmedBemCluster> testClusterTree;
shared_ptr<IndexPermutation> test_o2pPermutation, test_p2oPermutation;
CCH::constructBemCluster(testSpace, indexWithGlobalDofs, acaOptions,
testClusterTree,
test_o2pPermutation, test_p2oPermutation);
shared_ptr<AhmedBemCluster> trialClusterTree;
shared_ptr<IndexPermutation> trial_o2pPermutation, trial_p2oPermutation;
if (symmetric || &testSpace == &trialSpace) {
trialClusterTree = testClusterTree;
trial_o2pPermutation = test_o2pPermutation;
trial_p2oPermutation = test_p2oPermutation;
} else
CCH::constructBemCluster(trialSpace, indexWithGlobalDofs, acaOptions,
trialClusterTree,
trial_o2pPermutation, trial_p2oPermutation);
// // Export VTK plots showing the disctribution of leaf cluster ids
// std::vector<unsigned int> testClusterIds;
// getClusterIds(*testClusterTree, test_p2oPermutation->permutedIndices(), testClusterIds);
// testSpace.dumpClusterIds("testClusterIds", testClusterIds,
// indexWithGlobalDofs ? GLOBAL_DOFS : FLAT_LOCAL_DOFS);
// std::vector<unsigned int> trialClusterIds;
// getClusterIds(*trialClusterTree, trial_p2oPermutation->permutedIndices(), trialClusterIds);
// trialSpace.dumpClusterIds("trialClusterIds", trialClusterIds,
// indexWithGlobalDofs ? GLOBAL_DOFS : FLAT_LOCAL_DOFS);
if (verbosityAtLeastHigh)
std::cout << "Test cluster count: " << testClusterTree->getncl()
<< "\nTrial cluster count: " << trialClusterTree->getncl()
<< std::endl;
unsigned int blockCount = 0;
shared_ptr<AhmedBemBlcluster> bemBlclusterTree(
CCH::constructBemBlockCluster(acaOptions, symmetric,
*testClusterTree, *trialClusterTree,
blockCount).release());
if (verbosityAtLeastHigh)
std::cout << "Mblock count: " << blockCount << std::endl;
std::vector<unsigned int> p2oTestDofs =
test_p2oPermutation->permutedIndices();
std::vector<unsigned int> p2oTrialDofs =
trial_p2oPermutation->permutedIndices();
WeakFormAcaAssemblyHelper<BasisFunctionType, ResultType>
helper(testSpace, trialSpace, p2oTestDofs, p2oTrialDofs,
localAssemblers, sparseTermsToAdd,
denseTermsMultipliers, sparseTermsMultipliers, options);
typedef mblock<typename AhmedTypeTraits<ResultType>::Type> AhmedMblock;
boost::shared_array<AhmedMblock*> blocks =
allocateAhmedMblockArray<ResultType>(bemBlclusterTree.get());
// matgen_sqntl(helper, AhmedBemBlclusterTree.get(), AhmedBemBlclusterTree.get(),
// acaOptions.recompress, acaOptions.eps,
// acaOptions.maximumRank, blocks.get());
// matgen_omp(helper, blockCount, AhmedBemBlclusterTree.get(),
// acaOptions.eps, acaOptions.maximumRank, blocks.get());
// // Dump mblocks
// const int mblockCount = AhmedBemBlclusterTree->nleaves();
// for (int i = 0; i < mblockCount; ++i)
// if (blocks[i]->isdns())
// {
// char buffer[1024];
// sprintf(buffer, "mblock-dns-%d-%d.txt",
// blocks[i]->getn1(), blocks[i]->getn2());
// arma::Col<ResultType> block((ResultType*)blocks[i]->getdata(),
// blocks[i]->nvals());
// arma::diskio::save_raw_ascii(block, buffer);
// }
// else
// {
// char buffer[1024];
// sprintf(buffer, "mblock-lwr-%d-%d.txt",
// blocks[i]->getn1(), blocks[i]->getn2());
// arma::Col<ResultType> block((ResultType*)blocks[i]->getdata(),
// blocks[i]->nvals());
// arma::diskio::save_raw_ascii(block, buffer);
// }
AhmedLeafClusterArray leafClusters(bemBlclusterTree.get());
leafClusters.sortAccordingToClusterSize();
const size_t leafClusterCount = leafClusters.size();
const ParallelizationOptions& parallelOptions =
options.parallelizationOptions();
int maxThreadCount = 1;
if (!parallelOptions.isOpenClEnabled())
{
if (parallelOptions.maxThreadCount() == ParallelizationOptions::AUTO)
maxThreadCount = tbb::task_scheduler_init::automatic;
else
maxThreadCount = parallelOptions.maxThreadCount();
}
tbb::task_scheduler_init scheduler(maxThreadCount);
tbb::atomic<size_t> done;
done = 0;
std::vector<ChunkStatistics> chunkStats(leafClusterCount);
// typedef AcaWeakFormAssemblerLoopBody<BasisFunctionType, ResultType> Body;
// // std::cout << "Loop start" << std::endl;
// tbb::tick_count loopStart = tbb::tick_count::now();
// // tbb::parallel_for(tbb::blocked_range<size_t>(0, leafClusterCount),
// // Body(helper, leafClusters, blocks, acaOptions, done
// // , chunkStats));
// tbb::parallel_for(ScatteredRange(0, leafClusterCount),
// Body(helper, leafClusters, blocks, acaOptions, done
// , chunkStats));
// tbb::tick_count loopEnd = tbb::tick_count::now();
// // std::cout << "Loop end" << std::endl;
typedef AcaWeakFormAssemblerLoopBody<BasisFunctionType, ResultType> Body;
typename Body::LeafClusterIndexQueue leafClusterIndexQueue;
for (size_t i = 0; i < leafClusterCount; ++i)
leafClusterIndexQueue.push(i);
if (verbosityAtLeastDefault)
std::cout << "About to start the ACA assembly loop" << std::endl;
tbb::tick_count loopStart = tbb::tick_count::now();
{
Fiber::SerialBlasRegion region; // if possible, ensure that BLAS is single-threaded
tbb::parallel_for(tbb::blocked_range<size_t>(0, leafClusterCount),
Body(helper, leafClusters, blocks, acaOptions, done,
verbosityAtLeastDefault,
leafClusterIndexQueue, symmetric, chunkStats));
}
tbb::tick_count loopEnd = tbb::tick_count::now();
if (verbosityAtLeastDefault) {
std::cout << "\n"; // the progress bar doesn't print the final \n
std::cout << "ACA loop took " << (loopEnd - loopStart).seconds() << " s"
<< std::endl;
}
// TODO: parallelise!
if (acaOptions.recompress) {
if (verbosityAtLeastDefault)
std::cout << "About to start ACA agglomeration" << std::endl;
agglH(bemBlclusterTree.get(), blocks.get(),
acaOptions.eps, acaOptions.maximumRank);
if (verbosityAtLeastDefault)
std::cout << "Agglomeration finished" << std::endl;
}
// // Dump timing data of individual chunks
// std::cout << "\nChunks:\n";
// for (int i = 0; i < leafClusterCount; ++i)
// if (chunkStats[i].valid) {
// int blockIndex = leafClusters[i]->getidx();
// std::cout << chunkStats[i].chunkStart << "\t"
// << chunkStats[i].chunkSize << "\t"
// << (chunkStats[i].startTime - loopStart).seconds() << "\t"
// << (chunkStats[i].endTime - loopStart).seconds() << "\t"
// << (chunkStats[i].endTime - chunkStats[i].startTime).seconds() << "\t"
// << blocks[blockIndex]->getn1() << "\t"
// << blocks[blockIndex]->getn2() << "\t"
// << blocks[blockIndex]->islwr() << "\t"
// << (blocks[blockIndex]->islwr() ? blocks[blockIndex]->rank() : 0) << "\n";
// }
{
size_t origMemory = sizeof(ResultType) * testDofCount * trialDofCount;
size_t ahmedMemory = sizeH(bemBlclusterTree.get(), blocks.get());
int maximumRank = Hmax_rank(bemBlclusterTree.get(), blocks.get());
if (verbosityAtLeastDefault)
std::cout << "\nNeeded storage: "
<< ahmedMemory / 1024. / 1024. << " MB.\n"
<< "Without approximation: "
<< origMemory / 1024. / 1024. << " MB.\n"
<< "Compressed to "
<< (100. * ahmedMemory) / origMemory << "%.\n"
<< "Maximum rank: " << maximumRank << ".\n"
<< std::endl;
if (acaOptions.outputPostscript) {
if (verbosityAtLeastDefault)
std::cout << "Writing matrix partition ..." << std::flush;
std::ofstream os(acaOptions.outputFname.c_str());
if (symmetric) // seems valid also for Hermitian matrices
psoutputHeH(os, bemBlclusterTree.get(), testDofCount, blocks.get());
else
psoutputGeH(os, bemBlclusterTree.get(), testDofCount, blocks.get());
os.close();
if (verbosityAtLeastDefault)
std::cout << " done." << std::endl;
}
}
int outSymmetry = NO_SYMMETRY;
if (symmetric) {
outSymmetry = SYMMETRIC;
if (!boost::is_complex<ResultType>())
outSymmetry |= HERMITIAN;
}
std::auto_ptr<DiscreteAcaLinOp> acaOp(
new DiscreteAcaLinOp(testDofCount, trialDofCount,
acaOptions.eps,
acaOptions.maximumRank,
outSymmetry,
bemBlclusterTree, blocks,
*trial_o2pPermutation,
*test_o2pPermutation,
parallelOptions));
std::auto_ptr<DiscreteBndOp> result;
if (indexWithGlobalDofs)
result = acaOp;
else {
#ifdef WITH_TRILINOS
// without Trilinos, this code will never be reached -- an exception
// will be thrown earlier in this function
typedef DiscreteBoundaryOperatorComposition<ResultType> DiscreteBndOpComp;
shared_ptr<DiscreteBndOp> acaOpShared(acaOp.release());
shared_ptr<DiscreteBndOp> trialGlobalToLocal =
constructOperatorMappingGlobalToFlatLocalDofs<
BasisFunctionType, ResultType>(trialSpace);
shared_ptr<DiscreteBndOp> testLocalToGlobal =
constructOperatorMappingFlatLocalToGlobalDofs<
BasisFunctionType, ResultType>(testSpace);
shared_ptr<DiscreteBndOp> tmp(
new DiscreteBndOpComp(acaOpShared, trialGlobalToLocal));
result.reset(new DiscreteBndOpComp(testLocalToGlobal, tmp));
#endif // WITH_TRILINOS
}
return result;
#else // without Ahmed
throw std::runtime_error("AcaGlobalAssembler::assembleDetachedWeakForm(): "
"To enable assembly in ACA mode, recompile BEM++ "
"with the symbol WITH_AHMED defined.");
#endif // WITH_AHMED
}