void CopySubsetIndicesToSides(ISubsetHandler& sh, TIterator elemsBegin,
TIterator elemsEnd, bool toUnassignedOnly)
{
typedef typename PtrToValueType<typename TIterator::value_type>::base_type TElem;
typedef typename TElem::side TSide;
if(!TElem::HAS_SIDES)
return;
UG_ASSERT(sh.grid(), "No grid assigned to subset-handler");
Grid& grid = *sh.grid();
typename Grid::traits<TSide>::secure_container sides;
for(TIterator iter = elemsBegin; iter != elemsEnd; ++iter){
TElem* e = *iter;
int si = sh.get_subset_index(e);
grid.associated_elements(sides, e);
for(size_t i = 0; i < sides.size(); ++i){
TSide* s = sides[i];
if(toUnassignedOnly){
if(sh.get_subset_index(s) == -1)
sh.assign_subset(s, si);
}
else
sh.assign_subset(s, si);
}
}
}
void FindSubsetGroups
(
std::vector<int> & minCondInd,
const std::vector<bool> & isMarked,
const ISubsetHandler & sh,
const NeighborhoodType nbhType
)
{
typedef typename geometry_traits<TBaseObj>::const_iterator elem_iterator;
UG_ASSERT (((int) isMarked.size ()) == sh.num_subsets (), "FindSubsetGroups: array size mismatch");
std::vector<TBaseObj*> neighbours;
// Prepare minCondInd
minCondInd.resize (sh.num_subsets ());
for (size_t si = 0; si < minCondInd.size (); si++)
minCondInd [si] = (isMarked [si])? si : -1;
// Loop over the subsets:
for (size_t si = 0; si < minCondInd.size (); si++)
{
int min_si;
// Marked subset?
if ((min_si = minCondInd [si]) < 0)
continue; // no, we do not treat this subset
// Yes, loop over the elements in the subdomain (in the grid level 0):
GridObjectCollection goc = sh.get_grid_objects_in_subset (si);
elem_iterator e_end = goc.end<TBaseObj> (0);
bool is_empty = true;
for (elem_iterator e_iter = goc.begin<TBaseObj> (0); e_iter != e_end; ++e_iter)
{
is_empty = false;
// Loop over the neighbours:
CollectNeighbors (neighbours, *e_iter, *sh.grid(), nbhType);
for (size_t k = 0; k < neighbours.size (); k++)
{
int min_nbr_si;
int nbr_si = sh.get_subset_index (neighbours [k]);
if (nbr_si < 0 || nbr_si >= (int) minCondInd.size ())
UG_THROW ("FindSubsetGroups: Illegal neighbour subset index.");
if ((min_nbr_si = minCondInd [nbr_si]) < 0)
continue; // we do not treat this subset
// Set the same smallest index to both groups of the subsets:
if (min_nbr_si < min_si)
{
for (size_t l = 0; l < minCondInd.size (); l++)
if (minCondInd [l] == min_si)
minCondInd [l] = min_nbr_si;
}
else if (min_nbr_si > min_si)
{
for (size_t l = 0; l < minCondInd.size (); l++)
if (minCondInd [l] == min_nbr_si)
minCondInd [l] = min_si;
}
}
}
if (is_empty) minCondInd [si] = -2;
}
}