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#ifndef CELL_PATCH_FACTORY_HH
#define CELL_PATCH_FACTORY_HH
#include <set>
#include <queue>
#include <dune/common/bitsetvector.hh>
#include <dune/common/fvector.hh>
#include <dune/fufem/referenceelementhelper.hh>
#include <dune/grid/common/mcmgmapper.hh>
#include <dune/faultnetworks/hierarchicleveliterator.hh>
template <class BasisType>
class CellPatchFactory
{
protected:
typedef typename BasisType::GridView GV;
typedef typename BasisType::LocalFiniteElement LFE;
typedef typename GV::Grid GridType;
typedef typename GridType::ctype ctype;
static const int dim = GridType::dimension;
typedef typename GridType::template Codim<0>::Entity Element;
typedef typename Dune::LevelMultipleCodimMultipleGeomTypeMapper<GridType, Dune::MCMGElementLayout > ElementMapper;
private:
const BasisType& basis_;
const int level_;
const GridType& grid;
const GV& gridView;
std::vector<std::vector<int>> cellLocalToGlobal;
std::vector<Dune::BitSetVector<1>> cellBoundaryDofs;
std::vector<std::vector<Element>> cellElements;
ElementMapper mapper;
private:
std::cout << message << std::endl;
for (size_t i=0; i<x.size(); i++) {
std::cout << x[i][0] << " ";
}
std::cout << std::endl << std::endl;
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bool containsInsideSubentity(const Element& elem, const typename GridType::LevelIntersection& intersection, int subEntity, int codim) {
return ReferenceElementHelper<double, dim>::subEntityContainsSubEntity(elem.type(), intersection.indexInInside(), 1, subEntity, codim);
}
public:
//setup
CellPatchFactory(const BasisType& basis, const int level) :
basis_(basis),
level_(level),
grid(basis_.getGridView().grid()),
gridView(basis_.getGridView()),
mapper(grid, level_) {
const auto& interfaces = basis_.faultNetwork();
cellElements.resize(0);
Dune::BitSetVector<1> visited(mapper.size());
visited.unsetAll();
std::queue<Element> cellSeeds;
cellSeeds.push(*gridView. template begin <0>());
size_t cellCount = 0;
while (!cellSeeds.empty()) {
const auto cellSeed = cellSeeds.front();
cellSeeds.pop();
if (visited[mapper.index(cellSeed)][0] == true)
continue;
cellCount++;
cellElements.resize(cellCount);
auto& elements = cellElements.back();
std::queue<Element> elementQueue;
elementQueue.push(cellSeed);
cellLocalToGlobal.resize(cellCount);
cellBoundaryDofs.resize(cellCount);
std::set<int> dofs;
std::set<int> boundaryDofs;
while (!elementQueue.empty()) {
const auto elem = elementQueue.front();
const auto elemID = mapper.index(elem);
elementQueue.pop();
if (visited[elemID][0] == true)
continue;
elements.push_back(elem);
visited[elemID][0] = true;
const LFE& lfe = basis_.getLocalFiniteElement(elem);
// insert dofs
for (size_t i=0; i<lfe.localBasis().size(); ++i) {
int dofIndex = basis_.index(elem, i);
dofs.insert(dofIndex);
}
for (const auto& is : intersections(gridView, elem)) {
if (is.neighbor()) {
const auto neighbor = is.outside();
const auto neighborId = mapper.index(neighbor);
if (!(visited[neighborId][0])) {
if (interfaces.isInterfaceIntersection(is)) {
cellSeeds.push(neighbor);
} else {
elementQueue.push(neighbor);
}
}
}
// set boundaryDofs
if (is.boundary()) {
const auto& localCoefficients = lfe.localCoefficients();
for (size_t i=0; i<localCoefficients.size(); i++) {
auto entity = localCoefficients.localKey(i).subEntity();
auto codim = localCoefficients.localKey(i).codim();
if (containsInsideSubentity(elem, is, entity, codim))
boundaryDofs.insert(basis_.index(elem, i));
}
}
}
}
auto& localToGlobal = cellLocalToGlobal.back();
auto& localBoundaryDofs = cellBoundaryDofs.back();
localToGlobal.resize(dofs.size());
localBoundaryDofs.resize(dofs.size());
localBoundaryDofs.unsetAll();
size_t i=0;
for (const auto& dof : dofs) {
localToGlobal[i] = dof;
if (boundaryDofs.count(dof)) {
localBoundaryDofs[i][0] = true;
}
i++;
}
}
}
auto& getLocalToGlobal() {
return cellLocalToGlobal;
}
auto& getRegionElements() {
return cellElements;
}
auto& getBoundaryDofs() {
return cellBoundaryDofs;
}
};
#endif