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

Subject: Re: [Boost-users] [GRAPH]write_graphviz and setS edges
From: Matthieu BOUSSARD (mboussar_at_[hidden])
Date: 2009-08-18 18:48:55

Thank you very much, I will try that. At the moment, I check manually 
the presence of parallel edges (not a long term solution).

Matthieu

Jeremiah Willcock a écrit :
> 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
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