From: Daniel Arndt <d.arndt@math.uni-goettingen.de>
Date: Sun, 17 Dec 2017 11:08:29 +0000 (+0100)
Subject: Increase stability of gmsh/create_tria_01
X-Git-Tag: v9.0.0-rc1~647^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a78d60e0dece185bacd74cc7d1a8cb64a75ed93c;p=dealii.git

Increase stability of gmsh/create_tria_01
---

diff --git a/tests/gmsh/create_tria_01.cc b/tests/gmsh/create_tria_01.cc
index 41ed72b2c8..fb790848c7 100644
--- a/tests/gmsh/create_tria_01.cc
+++ b/tests/gmsh/create_tria_01.cc
@@ -13,6 +13,28 @@
 // format.
 
 #include "../tests.h"
+#include <deal.II/grid/grid_in.h>
+#include <deal.II/grid/tria.h>
+
+template <int dim>
+void gmsh_grid (const char *name)
+{
+  Triangulation<dim> tria;
+  GridIn<dim> grid_in;
+  grid_in.attach_triangulation (tria);
+  std::ifstream input_file(name);
+  grid_in.read_msh(input_file);
+
+  deallog << "  " << tria.n_active_cells() << " active cells" << std::endl;
+
+  int hash = 0;
+  int index = 0;
+  for (typename Triangulation<dim>::active_cell_iterator c=tria.begin_active();
+       c!=tria.end(); ++c, ++index)
+    for (unsigned int i=0; i<GeometryInfo<dim>::vertices_per_cell; ++i)
+      hash += (index * i * c->vertex_index(i)) % (tria.n_active_cells()+1);
+  deallog << "  hash=" << hash << std::endl;
+}
 
 int main ()
 {
@@ -21,10 +43,10 @@ int main ()
 
   geo << "Lx = 25.0;" << std::endl
       << "Ly = 1.0;" << std::endl
-      << "Point(1) = {0, 0, 0, 1};" << std::endl
-      << "Point(2) = {Lx, 0, 0, 1};" << std::endl
-      << "Point(3) = {Lx, Ly, 0, 1};" << std::endl
-      << "Point(4) = {0, Ly, 0, 1};" << std::endl
+      << "Point(1) = {0, 0, 0, Lx};" << std::endl
+      << "Point(2) = {Lx, 0, 0, Lx};" << std::endl
+      << "Point(3) = {Lx, Ly, 0, Lx};" << std::endl
+      << "Point(4) = {0, Ly, 0, Lx};" << std::endl
       << "Line(1) = {1, 2};" << std::endl
       << "Line(2) = {2, 3};" << std::endl
       << "Line(3) = {3, 4};" << std::endl
@@ -36,8 +58,9 @@ int main ()
 
   geo.close();
 
-  std::system(DEAL_II_GMSH_EXECUTABLE_PATH " -2 file.geo 1>file.log 2>file_warn.log");
-
+  const int ierr = std::system(DEAL_II_GMSH_EXECUTABLE_PATH " -2 file.geo 1>file.log 2>file_warn.log");
+  Assert(ierr==0, ExcInternalError());
+  gmsh_grid<2>("file.msh");
   cat_file("file.msh");
 
   return 0;
diff --git a/tests/gmsh/create_tria_01.output b/tests/gmsh/create_tria_01.output
index 9233a4400d..053731e3d2 100644
--- a/tests/gmsh/create_tria_01.output
+++ b/tests/gmsh/create_tria_01.output
@@ -1,69 +1,31 @@
 
+DEAL::  2 active cells
+DEAL::  hash=2
 $MeshFormat
 2.2 0 8
 $EndMeshFormat
 $Nodes
-22
+6
 1 0 0 0
 2 25 0 0
 3 25 1 0
 4 0 1 0
-5 2.499999999990396 0 0
-6 4.999999999978534 0 0
-7 7.499999999965566 0 0
-8 9.999999999960014 0 0
-9 12.49999999995592 0 0
-10 14.99999999995182 0 0
-11 17.49999999995897 0 0
-12 19.99999999997264 0 0
-13 22.49999999998631 0 0
-14 22.50000000001776 1 0
-15 20.00000000003553 1 0
-16 17.50000000005329 1 0
-17 15.00000000006453 1 0
-18 12.50000000006454 1 0
-19 10.00000000006455 1 0
-20 7.500000000053301 1 0
-21 5.000000000035541 1 0
-22 2.500000000017781 1 0
+5 12.49999999995592 0 0
+6 12.50000000006453 1 0
 $EndNodes
 $Elements
-36
+12
 1 15 2 0 1 1
 2 15 2 0 2 2
 3 15 2 0 3 3
 4 15 2 0 4 4
 5 1 2 0 1 1 5
-6 1 2 0 1 5 6
-7 1 2 0 1 6 7
-8 1 2 0 1 7 8
-9 1 2 0 1 8 9
-10 1 2 0 1 9 10
-11 1 2 0 1 10 11
-12 1 2 0 1 11 12
-13 1 2 0 1 12 13
-14 1 2 0 1 13 2
-15 1 2 0 2 2 3
-16 1 2 0 3 3 14
-17 1 2 0 3 14 15
-18 1 2 0 3 15 16
-19 1 2 0 3 16 17
-20 1 2 0 3 17 18
-21 1 2 0 3 18 19
-22 1 2 0 3 19 20
-23 1 2 0 3 20 21
-24 1 2 0 3 21 22
-25 1 2 0 3 22 4
-26 1 2 0 4 4 1
-27 3 2 0 0 3 14 13 2
-28 3 2 0 0 14 15 12 13
-29 3 2 0 0 15 16 11 12
-30 3 2 0 0 16 17 10 11
-31 3 2 0 0 17 18 9 10
-32 3 2 0 0 18 19 8 9
-33 3 2 0 0 19 20 7 8
-34 3 2 0 0 20 21 6 7
-35 3 2 0 0 21 22 5 6
-36 3 2 0 0 22 4 1 5
+6 1 2 0 1 5 2
+7 1 2 0 2 2 3
+8 1 2 0 3 3 6
+9 1 2 0 3 6 4
+10 1 2 0 4 4 1
+11 3 2 0 0 3 6 5 2
+12 3 2 0 0 6 4 1 5
 $EndElements