From: Bruno Turcksin <bruno.turcksin@gmail.com>
Date: Wed, 6 Nov 2013 23:03:56 +0000 (+0000)
Subject: Add test for graph_coloring.
X-Git-Tag: v8.1.0~372
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c17231b1942ba5ad57793e02898832ed55a57b7;p=dealii.git

Add test for graph_coloring.

git-svn-id: https://svn.dealii.org/trunk@31568 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/tests/base/graph_coloring_05.cc b/tests/base/graph_coloring_05.cc
new file mode 100644
index 0000000000..f3d92deb3d
--- /dev/null
+++ b/tests/base/graph_coloring_05.cc
@@ -0,0 +1,105 @@
+// ---------------------------------------------------------------------
+// $Id: graph_coloring_02.cc 30045 2013-07-18 19:18:00Z maier $
+//
+// Copyright (C) 2003 - 2013 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+
+// Check that graph coloring works on adapted mesh with a uniform polynomial
+// order.
+
+
+#include "../tests.h"
+#include <fstream>
+#include <set>
+#include <vector>
+
+#include <deal.II/base/graph_coloring.h>
+#include <deal.II/dofs/dof_accessor.h>
+#include <deal.II/dofs/dof_handler.h>
+#include <deal.II/fe/fe_q.h>
+#include <deal.II/grid/grid_generator.h>
+#include <deal.II/grid/tria_accessor.h>
+#include <deal.II/grid/tria_iterator.h>
+#include <deal.II/grid/tria.h>
+
+template <int dim>
+std::vector<types::global_dof_index> get_conflict_indices_cfem(
+    typename DoFHandler<dim>::active_cell_iterator const &it) 
+{
+  std::vector<types::global_dof_index> local_dof_indices(it->get_fe().dofs_per_cell);
+  it->get_dof_indices(local_dof_indices);
+
+  return local_dof_indices;
+}
+
+template <int dim>
+void check()
+{
+  // Create the Triangulation and the DoFHandler
+  Triangulation<dim> triangulation;
+  GridGenerator::hyper_cube(triangulation);
+  triangulation.refine_global(2);
+  FE_Q<dim> fe(2);
+  DoFHandler<dim> dof_handler(triangulation);
+  dof_handler.distribute_dofs(fe);
+
+  // Create an adapted mesh
+  typename DoFHandler<dim>::active_cell_iterator
+  cell = dof_handler.begin_active();
+  for (; cell<dof_handler.end(); ++cell)
+  {
+    if ((cell->center()[0]==0.625) && (cell->center()[1]==0.625))
+    cell->set_refine_flag();
+  }
+  triangulation.execute_coarsening_and_refinement();
+  dof_handler.distribute_dofs(fe);
+
+  // Create the coloring
+  std::vector<std::vector<typename DoFHandler<dim>::active_cell_iterator> > coloring(
+      graph_coloring::make_graph_coloring(dof_handler.begin_active(),dof_handler.end(),
+        std_cxx1x::function<std::vector<types::global_dof_index> (typename 
+          DoFHandler<dim>::active_cell_iterator const &)> (&get_conflict_indices_cfem<dim>)));
+
+  // Check that a color does not contain a conflict index twice
+  for (unsigned int color=0; color<coloring.size(); ++color)
+  {
+    std::set<types::global_dof_index> color_set;
+    for (unsigned int i=0; i<coloring[color].size(); ++i)
+    {
+      std::vector<types::global_dof_index> dofs = get_conflict_indices_cfem<dim>(coloring[color][i]);
+      for (unsigned int j=0; j<dofs.size(); ++j)
+      {
+        if (color_set.count(dofs[j])!=0)
+          deallog<<"Error in color: "<<color<<std::endl;
+        color_set.insert(dofs[j]);
+      }
+    }
+  }
+
+  deallog<<"OK"<<std::endl;
+}
+
+int main()
+{
+  std::ofstream logfile("output");
+  deallog<<std::setprecision(4);
+  deallog<<std::fixed;
+  deallog.attach(logfile);
+  deallog.depth_console(0);
+
+  check<2> ();
+
+  return 0;
+}
diff --git a/tests/base/graph_coloring_05.output b/tests/base/graph_coloring_05.output
new file mode 100644
index 0000000000..0fd8fc12f0
--- /dev/null
+++ b/tests/base/graph_coloring_05.output
@@ -0,0 +1,2 @@
+
+DEAL::OK