Jump to content
  • Advertisement
Sign in to follow this  

Boost graph question

This topic is 4888 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hey guys :) I'm working on the "maximum flow" problem . I'm trying to use the " push_relabel_max_flow " function of the boost::graph lib. http://www.boost.org/libs/graph/doc/push_relabel_max_flow.html And im missing some things ; i've build my directed graph with all the edges and their capacity value , i got 2 edge with a property string = "source" & "sink" . Their is a few things i dont understand : - how do i create the reverse of edges ? do i have to to this by myself ? - i need 2 vertex_descriptor ( sink / source ), if my code corrrect :
typedef graph_traits < Graph >::vertex_descriptor Vertex ;
Vertex s s2 ;
I also wonder how do i affect those vertex to the 2 taht i need ( labled source and sink ) . Do i have to parse all my vertice and do something like this :
typedef graph_traits < Graph >::vertex_iterator vertex_it ;
std::pair<vertex_it, vertex_it> vp;
for ( vp = vertices(Network) ;vp.first != vp.second; ++vp.first)
   if (  name[*vp.first] == "sink" ) s2 = *vp.first ;
   if ( name[*vp.first] == "source" ) s = *vp.first ;
i just created my graph like this
typedef adjacency_list_traits<vecS, vecS, directedS> Traits;

typedef adjacency_list < vecS, vecS, directedS,Etat, property <edge_capacity_t , long,
                                                     property <edge_residual_capacity_t, long,  
													 property <edge_reverse_t, Traits::edge_descriptor > > > > Graph;

Etat is the string property . I dont know what does the last property do ... im kinda confused if you got any tips ... EDIT : one sentence that bugs me : " The ReverseEdgeMap argument rev must map each edge in the original graph to its reverse edge, that is (u,v) -> (v,u) for all (u,v) in E " What exatly do i have to do ? [Edited by - Ey-Lord on May 30, 2005 7:45:49 AM]

Share this post

Link to post
Share on other sites
Sign in to follow this  

  • Advertisement

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!