By the way, I thought there might be an issue w/ my using a rectangle topology for the random_graph_layout and then a square topology for the fructerman_reingold ... so I changed it all to use the rectangle topology, but that didn't fix the problem. New code is below: using namespace boost; // Declare global types enum vertex_position_t { vertex_position }; namespace boost { BOOST_INSTALL_PROPERTY(vertex, position); } //typedef square_topology<>::point_type point; typedef rectangle_topology<>::point_type point; struct simple_edge { int first, second; }; struct spring_attractive_force { template<typename Graph, typename T> T operator()(typename graph_traits<Graph>::edge_descriptor, T k, T d, const Graph&) const { return d; } }; struct magnetic_repulsive_force { template<typename Graph, typename T> T operator()(typename graph_traits<Graph>::vertex_descriptor, typename graph_traits<Graph>::vertex_descriptor, T k, T d, const Graph&) const { return 1 / (d * d); } }; int _tmain(int argc, _TCHAR* argv[]) { typedef adjacency_list<listS, listS, undirectedS, // Vertex properties property<vertex_index_t, int, property<vertex_position_t, point> >, // Edge properties property<edge_weight_t, double> > Graph; enum {A, B, C, D, E, F, G, H}; simple_edge triangular_edges[14] = { {A, B}, {B, C}, {C, A}, {D, E}, {E, F}, {F, G}, {G, H}, {H, D}, {D, F}, {F, H}, {H, E}, {E, G}, {G, D} }; Graph g(&triangular_edges[0], &triangular_edges[13], 8); // Generate (x,y) coordinates for every node // - Randomly layout vertices of graph minstd_rand gen; rectangle_topology<> rect_top(gen, -25, -25, 25, 25); random_graph_layout(g, get(vertex_position, g), rect_top); // - Run Fruchterman Reingold algorithm on them //typedef square_topology<> Topology; //Topology topology(gen, 50.0); fruchterman_reingold_force_directed_layout(g, get(vertex_position, g), /* topology */ rect_top, attractive_force(spring_attractive_force()). repulsive_force(magnetic_repulsive_force()). force_pairs(all_force_pairs()). cooling(linear_cooling<double>(100))); } -- View this message in context: http://boost.2283326.n4.nabble.com/Trouble-w-fruchterman-reingold-tp4636494p... Sent from the Boost - Users mailing list archive at Nabble.com.