public Solution DFSGraphSearchRecursive(int start, int stop)
{
List <int> solution = new List <int>();
List <Arc> arcList = new List <Arc>();
Stack <int> frontier = new Stack <int>();
List <int> explored = new List <int>();
frontier.Push(start);
bool isFound = false;
Stopwatch sw = new Stopwatch();
sw.Start();
//DFS checks if solution available
isFound = DFSGraphRecursive(stop, ref frontier, ref arcList, ref explored);
sw.Stop();
time = sw.ElapsedMilliseconds;
memorySize = stackCallCounter;
Console.WriteLine("Memory size:" + memorySize);
System.IO.File.WriteAllText("output.txt", "Memory size:" + memorySize + "\n");
Console.WriteLine("Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
System.IO.File.AppendAllText("output.txt", "Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
//Find Parents
if (isFound == true)
{
Arc arc = arcList.First(a => a.child == stop);
solution.Add(stop);
while (arc.parent != start)
{
arc = arcList.First(a => a.child == arc.parent);
solution.Add(arc.child);
}
solution.Add(start);
solution.Reverse();
}
else
{
return new Solution()
{
isSolved = false
}
};
return(new Solution(solution, RouteFind.FindRoute(solution)));
}
public Solution BFSGraphSearch(int start, int stop)
{
List <int> solution = new List <int>();
List <Arc> arcList = new List <Arc>();
Queue <int> frontier = new Queue <int>();
frontier.Enqueue(start);
List <int> explored = new List <int>();
bool isFound = false;
Stopwatch sw = new Stopwatch();
sw.Start();
//BFS checks if solution available
while (isFound == false && frontier.Count != 0)
{
int leaf = frontier.Dequeue();
if (stop == leaf)
{
isFound = true;
}
explored.Add(leaf);
for (int j = 0; j < Route_stops.AllStops.Count; j++) //Explore child nodes by looking into StopsGraph
{
if (Route_stops.StopsGraph[leaf, j] != 0 && !explored.Contains(j) && !frontier.Contains(j))
{
frontier.Enqueue(j);
Arc arc = new Arc();
arc.parent = leaf;
arc.child = j;
arcList.Add(arc);
}
}
}
sw.Stop();
time = sw.ElapsedMilliseconds;
memorySize = frontier.Count + explored.Count;
Console.WriteLine("Memory size:" + memorySize);
System.IO.File.WriteAllText("output.txt", "Memory size:" + memorySize + "\n");
Console.WriteLine("Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
System.IO.File.AppendAllText("output.txt", "Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
//Find Parents
if (isFound == true)
{
Arc arc = arcList.First(a => a.child == stop);
solution.Add(stop);
while (arc.parent != start)
{
arc = arcList.First(a => a.child == arc.parent);
solution.Add(arc.child);
}
solution.Add(start);
solution.Reverse();
}
else
{
return new Solution()
{
isSolved = false
}
};
return(new Solution(solution, RouteFind.FindRoute(solution)));
}
public Solution AstarLeastRoute(int start, int stop)
{
List <int> solution = new List <int>();
List <Arc> arcList = new List <Arc>();
List <Node> frontier = new List <Node>();
frontier.Add(new Node()
{
node = start, distance = Route_stops.StopDistance(start, stop)
});
List <int> explored = new List <int>();
bool isFound = false;
Stopwatch sw = new Stopwatch();
sw.Start();
//A* checks if solution available
while (isFound == false && frontier.Count != 0)
{
frontier = frontier.OrderBy(c => c.distance).ToList(); //Select with least f(x)= h(x) + g(x)
Node leafNode = frontier.First();
int leaf = leafNode.node;
frontier.Remove(leafNode);
if (stop == leaf)
{
isFound = true;
}
else
{
explored.Add(leaf);
List <Node> children = new List <Node>();
for (int j = 0; j < Route_stops.AllStops.Count; j++) //Explore child nodes by looking into StopsGraph
{
if (Route_stops.StopsGraph[leaf, j] != 0 && !explored.Contains(j) && !frontier.Any(f => f.node == j))
{
double distanceUntilThisNode = 0;
if (arcList.Count != 0 && explored.Count > 1)
{
List <int> tempStopList = new List <int>();
tempStopList.Add(j);
tempStopList.Add(leaf);
Arc arc = arcList.First(a => a.child == leaf);
while (arc.parent != start)
{
arc = arcList.First(a => a.child == arc.parent);
tempStopList.Add(arc.child);
}
tempStopList.Add(start);
tempStopList.Reverse();
distanceUntilThisNode = RouteFind.FindRoute(tempStopList).Count;
}
frontier.Add(new Node()
{
node = j, distance = distanceUntilThisNode
}); // = h(n)
Arc arcAdd = new Arc();
arcAdd.parent = leaf;
arcAdd.child = j;
arcList.Add(arcAdd);
}
}
}
}
sw.Stop();
time = sw.ElapsedMilliseconds;
memorySize = frontier.Count + explored.Count;
Console.WriteLine("Memory size:" + memorySize);
System.IO.File.WriteAllText("output.txt", "Memory size:" + memorySize + "\n");
Console.WriteLine("Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
System.IO.File.AppendAllText("output.txt", "Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
//Find Parents
if (isFound == true)
{
Arc arc = arcList.First(a => a.child == stop);
solution.Add(stop);
while (arc.parent != start)
{
arc = arcList.First(a => a.child == arc.parent);
solution.Add(arc.child);
}
solution.Add(start);
solution.Reverse();
}
else
{
return new Solution()
{
isSolved = false
}
};
return(new Solution(solution, RouteFind.FindRoute(solution)));
}
}
public Solution DFSTreeSearchNonRecursive(int start, int stop)
{
List <int> solution = new List <int>();
List <Arc> arcList = new List <Arc>();
Stack <int> frontier = new Stack <int>();
frontier.Push(start);
bool isFound = false;
Stopwatch sw = new Stopwatch();
sw.Start();
//DFS checks if solution available
while (isFound == false && frontier.Count != 0)
{
if (frontier.Count > 100000)
{
System.IO.File.WriteAllText("output.txt", "Function ended to prevent infinite loop.");
return(new Solution()
{
isSolved = false
}); //Probably stuck on infinite loop
}
int leaf = frontier.Pop();
if (stop == leaf)
{
isFound = true;
}
for (int j = 0; j < Route_stops.AllStops.Count; j++)
{
if (Route_stops.StopsGraph[leaf, j] != 0)
{
frontier.Push(j);
Arc arc = new Arc();
arc.parent = leaf;
arc.child = j;
arcList.Add(arc);
}
}
}
sw.Stop();
time = sw.ElapsedMilliseconds;
memorySize = frontier.Count;
Console.WriteLine("Memory size:" + memorySize);
System.IO.File.WriteAllText("output.txt", "Memory size:" + memorySize + "\n");
Console.WriteLine("Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
System.IO.File.AppendAllText("output.txt", "Search done in " + sw.ElapsedMilliseconds + " miliseconds = " + sw.Elapsed);
//Find Parents
if (isFound == true)
{
Arc arc = arcList.First(a => a.child == stop);
solution.Add(stop);
while (arc.parent != start)
{
arc = arcList.First(a => a.child == arc.parent);
solution.Add(arc.child);
}
solution.Add(start);
solution.Reverse();
//return solution;
}
else
{
return new Solution()
{
isSolved = false
}
};
return(new Solution(solution, RouteFind.FindRoute(solution)));
}