Why can't I use boost graph write_graphviz with OutEdgeList=listS and VertexList=listS
Hi Why can't I compile the following simple app. If I changes listS to vecS every thing works just fine. (I'am using boost 1.46.1 and gcc 4.4.5) #include <iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/graphviz.hpp> int main(int argc, const char *argv[]) { boost::adjacency_list< boost::listS, boost::listS, boost::bidirectionalS > g; boost::write_graphviz(std::cout, g); return 0; } Best regards Allan W. Nielsen
On Mon, 25 Apr 2011, Allan Nielsen wrote:
Hi
Why can't I compile the following simple app. If I changes listS to vecS every thing works just fine. (I'am using boost 1.46.1 and gcc 4.4.5)
#include <iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/graphviz.hpp>
int main(int argc, const char *argv[]) { boost::adjacency_list< boost::listS, boost::listS, boost::bidirectionalS > g;
boost::write_graphviz(std::cout, g);
return 0; }
The write_graphviz function requires a vertex_index map, which is not provided by default by graphs with listS as the vertex container. You can add that property explicitly to a listS graph, and fill it in before the write_graphviz call (after any changes to the graph vertices). -- Jeremiah Willcock
Hi
The write_graphviz function requires a vertex_index map, which is not provided by default by graphs with listS as the vertex container. You can add that property explicitly to a listS graph, and fill it in before the write_graphviz call (after any changes to the graph vertices).
Thanks.... But it is not clear to me how to do this (sorry, i'am quite new to BGL) If I would just like to use the vertes_descriptor pointers as lables, what would that look like?? Do you know about an example I could look at?? -- Allan
On Mon, 25 Apr 2011, Allan Nielsen wrote:
Hi
The write_graphviz function requires a vertex_index map, which is not provided by default by graphs with listS as the vertex container. You can add that property explicitly to a listS graph, and fill it in before the write_graphviz call (after any changes to the graph vertices).
Thanks.... But it is not clear to me how to do this (sorry, i'am quite new to BGL)
If I would just like to use the vertes_descriptor pointers as lables, what would that look like??
Try something like this (not tested): #include <boost/lexical_cast.hpp> struct vertex_desc_node_id_map { template <typename T> friend std::string get(const vertex_desc_node_id_map&, const T& x) { return boost::lexical_cast<std::string>(x); } }; namespace boost { template <> struct property_traits<vertex_desc_node_id_map> { typedef std::string value_type; typedef std::string& reference; typedef void key_type; typedef readable_property_map_tag category; }; } and then add 'dp.property("node_id", vertex_desc_node_id_map());' (where "dp" is your dynamic_properties object) before calling write_graphviz_dp.
Do you know about an example I could look at??
No, I don't. -- Jeremiah Willcock
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