public static void RunDFS(List <Node> nodes, ShortestPathResult shortestPath)
{
bool[] vis = new bool[nodes.Count + 1];
Array.Fill(vis, false);
n = nodes;
DFSReq(vis, shortestPath.FromNodeId, shortestPath.ToNodeId, shortestPath.Path, shortestPath.Distance);
}
private static List <ShortestPathResult> FormatResult(int startVertex, int[] distances, int[] parents)
{
List <ShortestPathResult> results = new List <ShortestPathResult>();
int nVertices = distances.Length;
for (int vertexIndex = 0; vertexIndex < nVertices; vertexIndex++)
{
if (vertexIndex != startVertex)
{
var result = new ShortestPathResult()
{
FromNodeId = startVertex,
ToNodeId = vertexIndex,
Distance = distances[vertexIndex]
};
FormatPath(vertexIndex, parents, result.Path);
results.Add(result);
}
}
return(results);
}
private static void PrintInfo(ShortestPathResult pathResult, List <Node> nodes)
{
Console.WriteLine(nodes.Find(n => n.Id == pathResult.FromNodeId)?.Name + "->" + nodes.Find(n => n.Id == pathResult.ToNodeId)?.Name);
Console.WriteLine("Distance : " + pathResult.Distance + "km");
PrintPath(pathResult.Path, nodes);
}
static void Main(string[] args)
{
var graph = InitializeGraph();
var matrix = graph.Matrix;
Console.WriteLine("Saisissez la ville de départ (Voir liste des villes dans villes.txt) :");
string startCity = string.Empty;
Node startNode = null;
do
{
startCity = Console.ReadLine();
startNode = graph.AllNodes.Find(n => n.Name == startCity);
if (startCity == null)
{
Console.WriteLine("Ville incorrecte");
}
} while (startCity == string.Empty && startNode == null);
Console.WriteLine("Saisissez la ville d'arriver :");
string endCity = string.Empty;
Node endNode = null;
do
{
endCity = Console.ReadLine();
endNode = graph.AllNodes.Find(n => n.Name == endCity);
if (endNode == null)
{
Console.WriteLine("Ville incorrecte");
}
} while (startCity == string.Empty || endNode == null);
Stopwatch stopwatch = new Stopwatch();
// Dijkstra
stopwatch.Start();
var dijkstra = Dijkstra.RunDijkstra(matrix, startNode.Id);
var dijkstraRes = dijkstra.Find(r => r.ToNodeId == endNode.Id);
stopwatch.Stop();
dijkstraConstTime = stopwatch.ElapsedTicks;
//DFS
var dfsResult = new ShortestPathResult()
{
FromNodeId = startNode.Id,
ToNodeId = endNode.Id
};
stopwatch.Reset();
stopwatch.Start();
DFS.RunDFS(graph.AllNodes, dfsResult);
var edges = graph.AllNodes.Select(n => n.Edges).SelectMany(i => i).Distinct().ToList();
for (int i = 0; i < dfsResult.Path.Count - 1; i++)
{
var n1 = dfsResult.Path[i];
var n2 = dfsResult.Path[i + 1];
dfsResult.Distance += edges.Find(e => e.Parent.Id == n1 && e.Child.Id == n2)?.Weigth ?? 0;
}
stopwatch.Stop();
DFSCalcTime = stopwatch.ElapsedTicks;
// Result
Console.WriteLine("Dijkstra :");
PrintInfo(dijkstraRes, graph.AllNodes);
Console.WriteLine();
Console.WriteLine("Time : " + dijkstraConstTime);
Console.WriteLine("=========================================");
Console.WriteLine("DFS :");
PrintInfo(dfsResult, graph.AllNodes);
Console.WriteLine();
Console.WriteLine("Time : " + DFSCalcTime);
}
