More precise value of pi.

git-svn-id: https://svn.dealii.org/trunk@3250 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/deal.II/source/grid/grid_generator.cc b/deal.II/deal.II/source/grid/grid_generator.cc
index 8356e2f4a280e83ce31255c4e967624591738c7f..013f528db0c0cc4b12a1a2bcb39ac7165a3fced5 100644 (file)
--- a/deal.II/deal.II/source/grid/grid_generator.cc
+++ b/deal.II/deal.II/source/grid/grid_generator.cc
@@ -258,7 +258,8 @@ void GridGenerator::hyper_shell<> (Triangulation<2>   &tria,
   Assert ((inner_radius > 0) && (inner_radius < outer_radius),
          ExcInvalidRadii ());
   
-  const double pi     = 3.1415926536;
+  const double pi     = 3.14159265358979323846;
+  
                                   // determine the number of cells
                                   // for the grid. if not provided by
                                   // the user determine it such that