If I have n elements defined with class CElement, how can one create vertices of those elements with boost graph - and connect them also? I've seen boost graph bundled props, but I just can't figure this one out.
I don't understand what you want to do exactly. Do you want to associate some data to vertices? Then use bundled properties.
//Define a class that has the data you want to associate to every vertex and edge
struct Vertex{ int foo;}
struct Edge{std::string blah;}
//Define the graph using those classes
typedef boost::adjacency_list<boost::listS, boost::vecS, boost::directedS, Vertex, Edge > Graph;
//Some typedefs for simplicity
typedef boost::graph_traits<Graph>::vertex_descriptor vertex_t;
typedef boost::graph_traits<Graph>::edge_descriptor edge_t;
//Instanciate a graph
Graph g;
// Create two vertices in that graph
vertex_t u = boost::add_vertex(g);
vertex_t v = boost::add_vertex(g);
// Create an edge conecting those two vertices
edge_t e; bool b;
boost::tie(e,b) = boost::add_edge(u,v,g);
// Set the properties of a vertex and the edge
g[u].foo = 42;
g[e].blah = "Hello world";
The are other ways to set the properties, but there you a have an example to bootstrap.
I hope I didn't misunderstand the question.