From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 1 Feb 2022 19:03:34 +0000 (-0700)
Subject: Micro simplication.
X-Git-Tag: v9.4.0-rc1~542^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4ee21bdcc1a6f7cf5a5c746ce846a7cc31b87c7;p=dealii.git

Micro simplication.
---

diff --git a/source/base/data_out_base.cc b/source/base/data_out_base.cc
index 92490893f7..21e867ad14 100644
--- a/source/base/data_out_base.cc
+++ b/source/base/data_out_base.cc
@@ -3283,13 +3283,10 @@ namespace DataOutBase
                     b[1] * (v_inter[2] - v_min[2]) - c + v_min[2];
 
       // normalize the gradient
-      double gradient_norm =
-        std::sqrt(std::pow(gradient[0], 2.0) + std::pow(gradient[1], 2.0));
-      gradient[0] /= gradient_norm;
-      gradient[1] /= gradient_norm;
+      gradient /= gradient.norm();
 
-      double lambda = -gradient[0] * (v_min[0] - v_max[0]) -
-                      gradient[1] * (v_min[1] - v_max[1]);
+      const double lambda = -gradient[0] * (v_min[0] - v_max[0]) -
+                            gradient[1] * (v_min[1] - v_max[1]);
 
       Point<6> gradient_parameters;