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 CopyGridLevel(MultiGrid& srcMG, Grid& destGrid,
ISubsetHandler& srcSH, ISubsetHandler& destSH,
int lvl, TAPos aPos)
{
Grid::VertexAttachmentAccessor<TAPos> aaPos(destGrid, aPos);
Grid::VertexAttachmentAccessor<TAPos> aaSrcPos(srcMG, aPos);
GridObjectCollection goc = srcMG.get_grid_objects();
AVertex aNewVrt;
srcMG.attach_to_vertices(aNewVrt);
Grid::VertexAttachmentAccessor<AVertex> aaNewVrt(srcMG, aNewVrt);
for(int si = destSH.num_subsets(); si < srcSH.num_subsets(); ++si)
{
destSH.subset_info(si) = srcSH.subset_info(si);
}
for(VertexIterator vrtIter = goc.begin<Vertex>(lvl); vrtIter != goc.end<Vertex>(lvl); ++vrtIter)
{
Vertex* srcVrt = *vrtIter;
Vertex* destVrt = *destGrid.create_by_cloning(srcVrt);
aaNewVrt[srcVrt] = destVrt;
aaPos[destVrt] = aaSrcPos[srcVrt];
destSH.assign_subset(destVrt, srcSH.get_subset_index(srcVrt));
}
CopyGridLevelElements<Edge>(srcMG, destGrid, srcSH, destSH, lvl, aNewVrt);
CopyGridLevelElements<Face>(srcMG, destGrid, srcSH, destSH, lvl, aNewVrt);
CopyGridLevelElements<Volume>(srcMG, destGrid, srcSH, destSH, lvl, aNewVrt);
srcMG.detach_from_vertices(aNewVrt);
}
void SelectInterfaceElements(ISelector& sel, ISubsetHandler& sh,
const TIter begin, const TIter end,
bool regardSelectedNbrsOnly)
{
typedef typename Pointer2Value<typename TIter::value_type>::type TElem;
typedef typename TElem::sideof TNbr;
if(!TElem::CAN_BE_SIDE)
return;
if(!sel.grid())
return;
Grid& grid = *sel.grid();
std::vector<TNbr*> nbrs;
for(TIter iter = begin; iter != end;){
TElem* elem = *iter;
++iter;
CollectAssociated(nbrs, grid, elem);
int si = -2;
for(size_t i = 0; i < nbrs.size(); ++i){
if(!regardSelectedNbrsOnly || sel.is_selected(nbrs[i])){
if(sh.get_subset_index(nbrs[i]) != si){
if(si == -2)
si = sh.get_subset_index(nbrs[i]);
else{
// elem is an interface element
sel.select(elem);
break;
}
}
}
}
}
}
void AssignAssociatedVerticesToSubsets(TSubsetHandler& sh,
const ISubsetHandler& srcIndHandler)
{
typedef typename geometry_traits<TElem>::const_iterator iterator;
for(size_t l = 0; l < sh.num_levels(); ++l){
for(int si = 0; si < sh.num_subsets(); ++si){
for(iterator iter = sh.template begin<TElem>(si, l);
iter != sh.template end<TElem>(si, l); ++iter)
{
TElem* e = *iter;
for(size_t i = 0; i < e->num_vertices(); ++i)
{
Vertex* vrt = e->vertex(i);
sh.assign_subset(vrt, srcIndHandler.get_subset_index(vrt));
}
}
}
}
}
void AssignAssociatedFacesToSubsets(TSubsetHandler& sh,
const ISubsetHandler& srcIndHandler)
{
typedef typename geometry_traits<TElem>::const_iterator iterator;
std::vector<Face*> vFaces;
for(size_t l = 0; l < sh.num_levels(); ++l){
for(int si = 0; si < sh.num_subsets(); ++si){
for(iterator iter = sh.template begin<TElem>(si, l);
iter != sh.template end<TElem>(si, l); ++iter)
{
TElem* e = *iter;
CollectFaces(vFaces, *sh.grid(), e);
for(size_t i = 0; i < vFaces.size(); ++i)
{
Face* f = vFaces[i];
sh.assign_subset(f, srcIndHandler.get_subset_index(f));
}
}
}
}
}
void CopyGridLevelElements(MultiGrid& srcMG, Grid& destGrid,
ISubsetHandler& srcSH, ISubsetHandler& destSH,
int lvl, AVertex& aNewVrt)
{
Grid::VertexAttachmentAccessor<AVertex> aaNewVrt(srcMG, aNewVrt);
GridObjectCollection goc = srcMG.get_grid_objects();
CustomVertexGroup vrts;
typedef typename Grid::traits<TElem>::iterator iter_t;
for(iter_t eIter = goc.begin<TElem>(lvl); eIter != goc.end<TElem>(lvl); ++eIter)
{
TElem* e = *eIter;
vrts.resize(e->num_vertices());
for(size_t iv = 0; iv < e->num_vertices(); ++iv)
{
vrts.set_vertex(iv, aaNewVrt[e->vertex(iv)]);
}
TElem* ne = *destGrid.create_by_cloning(e, vrts);
destSH.assign_subset(ne, srcSH.get_subset_index(e));
}
}
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;
}
}