/// <summary>
/// Computes the minimum spanning tree using Kruskal's algorithm.
/// </summary>
/// <typeparam name="TVertex">type of the vertices</typeparam>
/// <typeparam name="TEdge">type of the edges</typeparam>
/// <param name="visitedGraph"></param>
/// <param name="weights"></param>
/// <returns></returns>
public static IEnumerable <TEdge> MinimumSpanningTreeKruskal <TVertex, TEdge>(
IUndirectedGraph <TVertex, TEdge> visitedGraph,
Func <TEdge, double> weights)
where TEdge : IEdge <TVertex>
{
Contract.Requires(visitedGraph != null);
Contract.Requires(weights != null);
if (visitedGraph.VertexCount == 0)
{
return(new TEdge[0]);
}
var kruskal = new KruskalMinimumSpanningTreeAlgorithm <TVertex, TEdge>(visitedGraph, weights);
var edgeRecorder = new EdgeRecorderObserver <TVertex, TEdge>();
using (edgeRecorder.Attach(kruskal))
kruskal.Compute();
return(edgeRecorder.Edges);
}