Re: [Boost-users] [GRAPH]write_graphviz and setS edges

Subject: Re: [Boost-users] [GRAPH]write_graphviz and setS edges
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2009-08-18 13:30:41

On Tue, 18 Aug 2009, Andrew Sutton wrote:

>       I'd like to use the simple write_graphviz function
>       write_graphviz(std::cout,g);
>
>       but since my graph doesn't allow multiple edges between two vertices, the graph type is defined by :
>       typedef adjacency_list <listS,setS, directedS,...>Graph;
>
>       but then I can't use the write_graphviz function anymore (compilation error). If I declare my graph with
>       typedef adjacency_list <listS,vecS, directedS,...>Graph;
>       it is fine, but  have multiple edges...
>
>       So my question is : is there a way to use write_graphviz with the setS edges representation ?
> 
> 
> I am not terribly familiar with the write_graphviz interface, so this may not be too helpful. I believe the problem is the manner in which setS and vecS identify vertices
> (descriptors) in the graph data structure. You may need to provide a vertex index map when you call write_graphviz, possibly using dynamic_properties. Unfortunately, I
> don't have any examples to point at. Perhaps other users will have encountered and solved the same problem.

I looked through the code, and that is the issue.  You can either provide 
a vertex_index property map for your graph, or give an explicit vertex_id 
argument to write_graphviz.

-- Jeremiah Willcock