<div dir="ltr"><div>Hi <br>Thank you for your replies.<br></div><div><br>It appears that I can iterate through only the Ghost and InteriorEntity for codim 0 for a given partition. This is OK as I am concerned about the elements that are truly interior to a partition.<br>I however need more information: how to extract all the vertices and edges (marked as blue in grid-howto) only on the border of the partition using this?<br><br>The border of partition must include the domain boundary if any (If I understand correctly, as per howto some of the edges/vertices can be of partitiontype interior and be on the domain boundary- aptly therefore marked red).<br><br></div><div>As of now, I am able to extract only the domain boundary edges in the partition this way. <br><br> const Dune::PartitionIteratorType pit_all=Dune::All_Partition ;<br> typedef typename GridType::template Codim<0>::template Partition<pit_all>::LeafIterator AllElementIterator;<br> typedef typename GridView::IntersectionIterator IntersectionIterator;<br><br> int all_ElmCount = 0;<br> for (AllElementIterator it = grid.template leafbegin<0,pit_all>(); it!=grid.template leafend<0,pit_all>(); ++it) {<br> if (it->partitionType() == Dune::GhostEntity)<br> continue;<br> IntersectionIterator isIt = gv.ibegin(*it);<br> const IntersectionIterator &isEndIt = gv.iend(*it);<br> int numedges_on_domain_boundary = 0;<br> std::cout << "coe: " << it->geometry().center() << std::endl;<br> for (; isIt != isEndIt; ++isIt) {<br> if(isIt->boundary()) ++ numedges_on_domain_boundary;<br> }<br> std::cout << "edges on domain boundary = " << numedges_on_domain_boundary << std::endl;<br> ++all_ElmCount;<br> } <br><br><br></div><div>One way to probe the border entities, I thought was to follow test-parallel-ug.cc code:<br><br>typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, LayoutWrapper<0>::template Layout><br> MapperType;<br> MapperType mapper(gv);<br><br><br></div><div>and then probe the entity as:<br><br>for (AllElementIterator it = grid.template leafbegin<0,pit_all>(); it!=grid.template leafend<0,pit_all>(); ++it) { // element loop 2001<br> int numberOfSubEntities = it->template count<1>();<br> std::cout << "no of subentities = " << numberOfSubEntities << std::endl;<br> for (int k = 0; k < numberOfSubEntities; k++)<br> {<br> typedef typename GridView::template Codim<0>::Entity Element;<br> typedef typename Element::template Codim<0>::EntityPointer EntityPointer;<br> const EntityPointer entityPointer(it->template subEntity<1>(k)); // <<========= compilation error occurs here<br> entityIndex[mapper.map(*entityPointer)] = mapper.map(*entityPointer);<br>}<br>}<br><br></div><div>But I have problem compiling this where I define the EntityPointer, the error is:<br><br></div><div> error: no matching function for call to ‘Dune::EntityPointer<const Dune::UGGrid<2>, Dune::UGGridEntityPointer<0, const Dune::UGGrid<2> > >::EntityPointer(Dune::Entity<0, 2, const Dune::UGGrid<2>, Dune::UGGridEntity>::subentity_return_info<1>::type)’<br> const EntityPointer entityPointer(it->template subEntity<1>(k));<br><br><br></div><div>Thank you,<br></div><div>Ganesh<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 15, 2015 at 5:38 PM, Markus Blatt <span dir="ltr"><<a href="mailto:markus@dr-blatt.de" target="_blank">markus@dr-blatt.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span>On Tue, Sep 15, 2015 at 02:42:47PM +0200, Jö Fahlke wrote:<br>
><br>
> To unify things, and to make using the vertices() and elements() functions<br>
> easier, recently a new scheme for naming partitions was introduced[4]. The<br>
> new scheme makes it possible to name name all possible combinations, even<br>
> though not all combinations are supported or are even meaningful in the<br>
> context of entity iterators or communication.<br>
<br>
</span>Isn't that against the principles DUNE ("one algorithm to use them<br>
(grids) all"?)?<br>
<br>
Can one query what combinations are supported by a grid?<br>
<span><font color="#888888"><br>
Markus<br>
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<br>
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</font></span></blockquote></div><br></div></div>