Hello all
I am attempting to implement a hp hybridized dg-method for solving
ellipctic problems in deal.II. I am relying on steps 27 and 51 of the
deal.II tutorial programs. However, when I try to group some FE_FaceQ
elements in an hp::FeCollection and distribute the degrees of freedom, I
get an ExcNotImplemented() exception thrown by some method
hp_vertex_dof_identities. Am I getting something wrong? Or is this feature
just not implemented for
FaceQ yet?
I have attached the error message and a minimal example that reproduces the
error.
Thanks,
Samuel
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--------------------------------------------------------
An error occurred in line <904> of file
</home/samuel/Downloads/dealii-8.4.1/source/fe/fe.cc> in function
std::vector<std::pair<unsigned int, unsigned int> >
dealii::FiniteElement<<anonymous>, <anonymous>
>::hp_vertex_dof_identities(const dealii::FiniteElement<<anonymous>,
<anonymous> >&) const [with int dim = 2; int spacedim = 2]
The violated condition was:
false
The name and call sequence of the exception was:
ExcNotImplemented()
Additional Information:
You are trying to use functionality in deal.II that is currently not
implemented. In many cases, this indicates that there simply didn't appear much
of a need for it, or that the author of the original code did not have the time
to implement a particular case. If you hit this exception, it is therefore
worth the time to look into the code to find out whether you may be able to
implement the missing functionality. If you do, please consider providing a
patch to the deal.II development sources (see the deal.II website on how to
contribute).
Stacktrace:
-----------
#0 /opt/dealii/lib/libdeal_II.g.so.8.4.1: dealii::FiniteElement<2,
2>::hp_vertex_dof_identities(dealii::FiniteElement<2, 2> const&) const
#1 /opt/dealii/lib/libdeal_II.g.so.8.4.1: void
dealii::internal::hp::ensure_existence_of_dof_identities<0, 2,
2>(dealii::FiniteElement<2, 2> const&, dealii::FiniteElement<2, 2> const&,
std::shared_ptr<std::vector<std::pair<unsigned int, unsigned int>,
std::allocator<std::pair<unsigned int, unsigned int> > > >&)
#2 /opt/dealii/lib/libdeal_II.g.so.8.4.1: dealii::hp::DoFHandler<2,
2>::compute_vertex_dof_identities(std::vector<unsigned int,
std::allocator<unsigned int> >&) const
#3 /opt/dealii/lib/libdeal_II.g.so.8.4.1: dealii::hp::DoFHandler<2,
2>::distribute_dofs(dealii::hp::FECollection<2, 2> const&)
#4 ./faceq_error: main
--------------------------------------------------------
#include <deal.II/grid/tria.h>
#include <deal.II/hp/dof_handler.h>
#include <deal.II/grid/grid_generator.h>
#include <deal.II/fe/fe_face.h>
#include <deal.II/dofs/dof_accessor.h>
using namespace dealii;
int main()
{
Triangulation<2> triangulation;
GridGenerator::hyper_cube(triangulation);
triangulation.refine_global(1);
Triangulation<2>::active_cell_iterator cell = triangulation.begin_active();
cell->set_refine_flag();
triangulation.execute_coarsening_and_refinement ();
hp::DoFHandler<2> dof_handler(triangulation);
hp::DoFHandler<2>::active_cell_iterator cell2 = dof_handler.begin_active(), endc = dof_handler.end();
for (;cell2!=endc;++cell2)
{
if (cell2->level()==2)
{
cell2->set_active_fe_index(1);
}
}
hp::FECollection<2> fe_collection;
fe_collection.push_back(FE_FaceQ<2>(1));
fe_collection.push_back(FE_FaceQ<2>(2));
dof_handler.distribute_dofs(fe_collection);
}
