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git-svn-id: https://svn.dealii.org/trunk@23016 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/source/fe/mapping_q1.cc b/deal.II/source/fe/mapping_q1.cc
index 34f474b93b20675b6426462f1d7596c19174f47e..9a8485f7223cf370c36a0982e233fe67068983c6 100644 (file)
--- a/deal.II/source/fe/mapping_q1.cc
+++ b/deal.II/source/fe/mapping_q1.cc
@@ -1087,11 +1087,19 @@ namespace internal
                                                   // tangent and the cell
                                                   // normal:
                  if ( (dim==1) && (spacedim==2) )
-                                                    // need to think how to
-                                                    // figure out whether we
-                                                    // need to point to the
-                                                    // left or right
-                   Assert (false, ExcNotImplemented())
+                   {
+                                                      // need to think how to
+                                                      // do this. the code
+                                                      // should be something
+                                                      // like the below, but
+                                                      // I can't test it
+                                                      // right now since we
+                                                      // can't use
+                                                      // FEFaceValues in 1d
+                     Assert (false, ExcNotImplemented());
+                     cross_product (boundary_forms[point],
+                                    (face_no == 0 ? 1 : -1) * cell_normal);
+                   }
                  else if ( (dim==2) && (spacedim==3) )
                    cross_product (boundary_forms[point],
                                   data.aux[0][point], cell_normal);