Merge branch 'fix_bddc_bbnd' into 'master'

fix for BDDC if BBND elements are in the mesh

See merge request jschoeberl/ngsolve!259

comp/bddc.cpp

@@ -70,21 +70,21 @@ namespace ngcomp
      // auto fes = bfa -> GetFESpace();
      shared_ptr<MeshAccess> ma = fes->GetMeshAccess();

      Array<int> wbdcnt(ma->GetNE()+ma->GetNSE());
      Array<int> ifcnt(ma->GetNE()+ma->GetNSE());
      Array<int> wbdcnt(ma->GetNE()+ma->GetNSE()+ma->GetNCD2E());
      Array<int> ifcnt(ma->GetNE()+ma->GetNSE()+ma->GetNCD2E());
      wbdcnt = 0;
      ifcnt = 0;
      const BitArray & freedofs = *fes->GetFreeDofs();
      

      LocalHeap lh(10000, "BDDC-constr, dummy heap");
      
      for (auto vb : { VOL, BND })
      for (auto vb : { VOL, BND, BBND })
        IterateElements 
          (*fes, vb, lh, 
           [&] (FESpace::Element el, LocalHeap & lh)
           {
             int base = (vb == VOL) ? 0 : ma->GetNE();
             int base = (vb == VOL) ? 0 : ((vb == BND) ? ma->GetNE() : ma->GetNE() + ma->GetNSE());
             for (auto d : el.GetDofs())
               {
                 if (d == -1) continue;
@@ -103,12 +103,12 @@ namespace ngcomp
      Table<int> el2wbdofs(wbdcnt);   // wirebasket dofs on each element
      Table<int> el2ifdofs(ifcnt);    // interface dofs on each element
      
      for (auto vb : { VOL, BND })
      for (auto vb : { VOL, BND, BBND })
        IterateElements 
          (*fes, vb, lh, 
           [&] (FESpace::Element el, LocalHeap & lh)
           {
             int base = (vb == VOL) ? 0 : ma->GetNE();
             int base = (vb == VOL) ? 0 : ((vb == BND) ? ma->GetNE() : ma->GetNE() + ma->GetNSE());
             int lifcnt = 0;
             int lwbcnt = 0;