add subtree-ish sources for 12.0.3

[ceph.git] / ceph / src / boost / libs / graph / example / planar_face_traversal.cpp

diff --git a/ceph/src/boost/libs/graph/example/planar_face_traversal.cpp b/ceph/src/boost/libs/graph/example/planar_face_traversal.cpp
new file mode 100644 (file)
index 0000000..fe96d2d
--- /dev/null
+++ b/ceph/src/boost/libs/graph/example/planar_face_traversal.cpp
@@ -0,0 +1,124 @@
+//=======================================================================
+// Copyright 2007 Aaron Windsor
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+#include <iostream>
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/properties.hpp>
+#include <boost/graph/graph_traits.hpp>
+#include <boost/property_map/property_map.hpp>
+#include <boost/ref.hpp>
+#include <vector>
+
+#include <boost/graph/planar_face_traversal.hpp>
+#include <boost/graph/boyer_myrvold_planar_test.hpp>
+
+
+using namespace boost;
+
+
+
+// Some planar face traversal visitors that will 
+// print the vertices and edges on the faces
+
+struct output_visitor : public planar_face_traversal_visitor
+{
+  void begin_face() { std::cout << "New face: "; }
+  void end_face() { std::cout << std::endl; }
+};
+
+
+
+struct vertex_output_visitor : public output_visitor
+{
+  template <typename Vertex> 
+  void next_vertex(Vertex v) 
+  { 
+    std::cout << v << " "; 
+  }
+};
+
+
+
+struct edge_output_visitor : public output_visitor
+{
+  template <typename Edge> 
+  void next_edge(Edge e) 
+  { 
+    std::cout << e << " "; 
+  }
+};
+
+
+int main(int argc, char** argv)
+{
+
+  typedef adjacency_list
+    < vecS,
+      vecS,
+      undirectedS,
+      property<vertex_index_t, int>,
+      property<edge_index_t, int>
+    > 
+    graph;
+
+  // Create a graph - this is a biconnected, 3 x 3 grid.
+  // It should have four small (four vertex/four edge) faces and
+  // one large face that contains all but the interior vertex
+  graph g(9);
+
+  add_edge(0,1,g);
+  add_edge(1,2,g);
+
+  add_edge(3,4,g);
+  add_edge(4,5,g);
+  
+  add_edge(6,7,g);
+  add_edge(7,8,g);
+
+
+  add_edge(0,3,g);
+  add_edge(3,6,g);
+
+  add_edge(1,4,g);
+  add_edge(4,7,g);
+
+  add_edge(2,5,g);
+  add_edge(5,8,g);
+  
+
+  // Initialize the interior edge index
+  property_map<graph, edge_index_t>::type e_index = get(edge_index, g);
+  graph_traits<graph>::edges_size_type edge_count = 0;
+  graph_traits<graph>::edge_iterator ei, ei_end;
+  for(boost::tie(ei, ei_end) = edges(g); ei != ei_end; ++ei)
+    put(e_index, *ei, edge_count++);
+  
+
+  // Test for planarity - we know it is planar, we just want to 
+  // compute the planar embedding as a side-effect
+  typedef std::vector< graph_traits<graph>::edge_descriptor > vec_t;
+  std::vector<vec_t> embedding(num_vertices(g));
+  if (boyer_myrvold_planarity_test(boyer_myrvold_params::graph = g,
+                                   boyer_myrvold_params::embedding = 
+                                       &embedding[0]
+                                   )
+      )
+    std::cout << "Input graph is planar" << std::endl;
+  else
+    std::cout << "Input graph is not planar" << std::endl;
+
+  
+  std::cout << std::endl << "Vertices on the faces: " << std::endl;
+  vertex_output_visitor v_vis;
+  planar_face_traversal(g, &embedding[0], v_vis);
+
+  std::cout << std::endl << "Edges on the faces: " << std::endl;
+  edge_output_visitor e_vis;
+  planar_face_traversal(g, &embedding[0], e_vis);
+
+  return 0;  
+}