Boost logo

Boost Users :

Subject: Re: [Boost-users] Filtered graph losing original property
From: giridhar (giridharms_at_[hidden])
Date: 2012-02-04 13:32:09

> Hello All,
> ????? I have a Graph with 3 children (sub graphs). After I filter
> certain edges of the main graph, I can't access the children. Is there
> any turn around to work this.

>>What do you mean "children"? How are they represented by properties.

typedef subgraph< adjacency_list<vecS, vecS, undirectedS,
   Vertexp, property< edge_index_t, unsigned int, Edgep > > > Graph;

This is the property of every graph even the main graph and children.

I am creating children like this:

    Graph g; // main graph

   //graph children

   Graph& g1=g.create_subgraph();
    Graph& g2=g.create_subgraph();
    Graph& g3=g.create_subgraph();

> I want some edges to be filtered from the total graph, but still the
> filtered graph should retain its original children (with filtered edges
> ofcourse). Any information on this would be great help to me.

That is the way that properties are supposed to work in filtered_graphs.

When I filter these graphs using the predicate, I can access the edges and
vertices (as if it is a whole single graph) from filtered graph. But
somehow filtered graph is forgetting that it is made of 3 subgraphs, i.e, I
cannot access children of filtered graph . For example consider G is the
filtered graph, I cannot access children through iterators.

tie(c1,c2)= G.children();

-- Jeremiah Willcock



Boost-users list run by williamkempf at, kalb at, bjorn.karlsson at, gregod at, wekempf at