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// Copyright 2004 The Trustees of Indiana University.
// Use, modification and distribution is subject to 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: Jeremiah Willcock
// Douglas Gregor
// Andrew Lumsdaine
#include <boost/graph/gursoy_atun_layout.hpp>
#include "boost/graph/adjacency_list.hpp"
#include "boost/graph/random.hpp"
#include "boost/graph/graphviz.hpp"
#include "boost/random/mersenne_twister.hpp"
#include "boost/random/linear_congruential.hpp"
#include "boost/random/uniform_01.hpp"
#include <iostream>
#include <fstream>
#include <sstream>
#if 0
#include <boost/graph/plod_generator.hpp>
#include <boost/graph/small_world_generator.hpp>
#endif
using namespace boost;
template <class Property, class Vertex>
struct position_writer {
const Property& property;
position_writer(const Property& property): property(property) {}
void operator()(std::ostream& os, const Vertex& v) const {
os << "[pos=\"" << int(property[v][0]) << "," << int(property[v][1]) << "\"]";
}
};
struct graph_writer {
void operator()(std::ostream& os) const {
os << "node [shape=point, width=\".01\", height=\".01\", fixedsize=\"true\"]"
<< std::endl;
}
};
int main(int, char*[]) {
// Generate a graph structured like a grid, cylinder, or torus; lay it out in
// a square grid; and output it in dot format
typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS,
boost::no_property,
boost::property<boost::edge_weight_t, double>
> graph_type;
typedef boost::graph_traits<graph_type>::vertex_descriptor vertex_descriptor;
// boost::mt19937 rng;
// boost::generate_random_graph(graph, 100, 600, rng, false, false);
#if 1
graph_type graph;
// Make grid, like Gursoy and Atun used
std::map<int, std::map<int, vertex_descriptor> > verts;
const int grid_size = 30;
boost::minstd_rand edge_weight_gen;
boost::uniform_01<boost::minstd_rand> random_edge_weight(edge_weight_gen);
for (int i = 0; i < grid_size; ++i)
for (int j = 0; j < grid_size; ++j)
verts[i][j] = add_vertex(graph);
for (int i = 0; i < grid_size; ++i) {
for (int j = 0; j < grid_size; ++j) {
if (i != 0)
add_edge(verts[i][j], verts[i-1][j], random_edge_weight(), graph);
if (j != 0)
add_edge(verts[i][j], verts[i][j-1], random_edge_weight(), graph);
#if 0
// Uncomment parts of this to get a cylinder or torus
if (i == 0)
add_edge(verts[0][j], verts[grid_size-1][j], random_edge_weight(),
graph);
if (j == 0)
add_edge(verts[i][0], verts[i][grid_size-1], random_edge_weight(),
graph);
#endif
}
}
#else
using namespace boost;
#if 0
int n = 10000;
double alpha = 0.4;
double beta = 50;
minstd_rand gen;
graph_type graph(plod_iterator<minstd_rand, graph_type>(gen, n, alpha, beta),
plod_iterator<minstd_rand, graph_type>(),
n);
#else
int n = 100000;
int k = 6;
double p = 0.001;
minstd_rand gen;
graph_type graph(small_world_iterator<minstd_rand>(gen, n, k, p),
small_world_iterator<minstd_rand>(n, k),
n);
#endif
#endif
// boost::read_graphviz(stdin, graph);
typedef boost::property_map<graph_type, boost::vertex_index_t>::type
VertexIndexMap;
VertexIndexMap vertex_index = get(boost::vertex_index_t(), graph);
typedef boost::heart_topology<> topology;
topology space;
typedef topology::point_type point;
std::vector<point> position_vector(num_vertices(graph));
typedef boost::iterator_property_map<std::vector<point>::iterator,
VertexIndexMap, point, point&> Position;
Position position(position_vector.begin(), vertex_index);
boost::gursoy_atun_layout(graph, space, position);
std::cerr << "--------Unweighted layout--------\n";
boost::write_graphviz(std::cout, graph,
position_writer<Position, vertex_descriptor>(position),
boost::default_writer(),
graph_writer());
boost::gursoy_atun_layout(graph, space, position,
weight_map(get(boost::edge_weight, graph)));
std::cerr << "--------Weighted layout--------\n";
boost::write_graphviz(std::cout, graph,
position_writer<Position, vertex_descriptor>(position),
boost::default_writer(),
graph_writer());
return 0;
}
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