boost/graph/random_layout.hpp
// 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