// Copyright 2004 The Trustees of Indiana University.

 // 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)

 //  Authors: Douglas Gregor

 //           Andrew Lumsdaine

 #ifndef BOOST_GRAPH_RANDOM_LAYOUT_HPP

 #define BOOST_GRAPH_RANDOM_LAYOUT_HPP

 #include <boost/graph/graph_traits.hpp>

 #include <boost/random/uniform_int.hpp>

 #include <boost/random/uniform_01.hpp>

 #include <boost/random/uniform_real.hpp>

 #include <boost/type_traits/is_integral.hpp>

 #include <boost/mpl/if.hpp>

 namespace boost {

 template<typename Graph, typename PositionMap, typename Dimension, 

          typename RandomNumberGenerator>

 void

 random_graph_layout(const Graph& g, PositionMap position_map,

                     Dimension minX, Dimension maxX, 

                     Dimension minY, Dimension maxY,

                     RandomNumberGenerator& gen)

 {

   typedef typename mpl::if_<is_integral<Dimension>,

                             uniform_int<Dimension>,

                             uniform_real<Dimension> >::type distrib_t;

   typedef typename mpl::if_<is_integral<Dimension>,

                             RandomNumberGenerator&,

                             uniform_01<RandomNumberGenerator, Dimension> >

     ::type gen_t;

   gen_t my_gen(gen);

   distrib_t x(minX, maxX);

   distrib_t y(minY, maxY);

   typename graph_traits<Graph>::vertex_iterator vi, vi_end;

   for(tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi) {

     position_map[*vi].x = x(my_gen);

     position_map[*vi].y = y(my_gen);

   }

 }

 } // end namespace boost

 #endif // BOOST_GRAPH_RANDOM_LAYOUT_HPP