From c5205498cb7f7fdbf1231be17c516a582ae269b9 Mon Sep 17 00:00:00 2001
From: Oliver Sander <oliver.sander@tu-dresden.de>
Date: Wed, 14 Nov 2018 11:50:30 +0100
Subject: [PATCH] Also implement the boundarydofs method for dune-functions
bases
With this patch, the method works both for old-style dune-fufem bases
and for dune-functions bases directly. The distinction is done
using some minor SFINAE trickery.
---
dune/fufem/functiontools/boundarydofs.hh | 49 +++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/dune/fufem/functiontools/boundarydofs.hh b/dune/fufem/functiontools/boundarydofs.hh
index 57dd6b94..b156363c 100644
--- a/dune/fufem/functiontools/boundarydofs.hh
+++ b/dune/fufem/functiontools/boundarydofs.hh
@@ -15,11 +15,58 @@
of freedom on the patch.
\param boundaryDofs Bit is set if corresponding dofs belongs to the boundary patch
+ \param sfinae Dummy parameter to instantiate this method only for dune-functions bases
*/
template <class GridView, class Basis, int blocksize>
void constructBoundaryDofs(const BoundaryPatch<GridView>& boundaryPatch,
const Basis& basis,
- Dune::BitSetVector<blocksize>& boundaryDofs)
+ Dune::BitSetVector<blocksize>& boundaryDofs,
+ typename Basis::LocalView* sfinae = nullptr)
+{
+ // Check consistency of the input
+ static_assert((std::is_same<GridView, typename Basis::GridView>::value),
+ "BoundaryPatch and global basis must be for the same grid view!");
+
+ //////////////////////////////////////////////////////////
+ // Init output bitfield
+ //////////////////////////////////////////////////////////
+
+ boundaryDofs.resize(basis.size({}));
+ boundaryDofs.unsetAll();
+
+ auto localView = basis.localView();
+
+ for (auto it = boundaryPatch.begin(); it != boundaryPatch.end(); ++it)
+ {
+ localView.bind(it->inside());
+ const auto& localCoefficients = localView.tree().finiteElement().localCoefficients();
+
+ for (size_t i=0; i<localCoefficients.size(); i++)
+ {
+ ////////////////////////////////////////////////////
+ // Test whether dof is on the boundary face
+ ////////////////////////////////////////////////////
+
+ unsigned int entity = localCoefficients.localKey(i).subEntity();
+ unsigned int codim = localCoefficients.localKey(i).codim();
+
+ if (it.containsInsideSubentity(entity, codim))
+ boundaryDofs[localView.index(i)] = true;
+ }
+ }
+}
+
+
+/** \brief For a given basis and boundary patch, determine all degrees
+ of freedom on the patch.
+
+ Same method as above, but this time for dune-fufem bases.
+*/
+template <class GridView, class Basis, int blocksize>
+void constructBoundaryDofs(const BoundaryPatch<GridView>& boundaryPatch,
+ const Basis& basis,
+ Dune::BitSetVector<blocksize>& boundaryDofs,
+ typename Basis::LocalFiniteElement* sfinae=nullptr)
{
// Check consistency of the input
static_assert((std::is_same<GridView, typename Basis::GridView>::value),
--
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