From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 3 Feb 2021 03:44:44 +0000 (-0700)
Subject: Simplify a computation.
X-Git-Tag: v9.3.0-rc1~523^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a7ea90f1e956f4efda9bf8806ed70dd2f37b9c4;p=dealii.git

Simplify a computation.
---

diff --git a/include/deal.II/grid/reference_cell.h b/include/deal.II/grid/reference_cell.h
index 892fec8364..be338585b1 100644
--- a/include/deal.II/grid/reference_cell.h
+++ b/include/deal.II/grid/reference_cell.h
@@ -698,13 +698,8 @@ namespace ReferenceCell
       {
         Assert(*this == Tri, ExcInternalError());
 
-        const auto tangential = unit_tangential_vectors<dim>(face_no, 0);
-
-        Tensor<1, dim> result;
-        result[0] = tangential[1];
-        result[1] = -tangential[0];
-
-        return result;
+        // Return the rotated vector
+        return cross_product_2d(unit_tangential_vectors<dim>(face_no, 0));
       }
     else if (dim == 3)
       {