protected static internal void AStarMinPath(string sourceCode, string destinationCode)
{
// отримуємо найкоротший шлях від аеропорта А до аеропорта Б
AirlineData.LoadData();
var watch = Stopwatch.StartNew();
var closedSet = new Queue <NextAirport>();
var openSet = new Queue <NextAirport>();
Airport source = AirlineData.GetAirPort(sourceCode);
var next = AirlineData.GetNextStation(sourceCode);
Graph.Source = next;
var qq = AirlineData.GetAirPort(destinationCode);
next.HeuristicEstimatePathLength = GetPath(source, qq);
next.previous = null;
next.PathLengthFromStart = 0;
next.HeuristicEstimatePathLength = GetPath(source, AirlineData.GetAirPort(destinationCode));
openSet.Enqueue(next);
while (openSet.Count > 0)
{
var currentAirport = openSet.OrderBy(node => node.EstimateFullPathLength).First();
if (currentAirport.Current.IATA == destinationCode)
{
//Console.WriteLine("SUCCESS!");
Console.WriteLine("Time spended {0}", watch.ElapsedMilliseconds);
Console.WriteLine($"There is the way from {source.AirportName} to {AirlineData.GetAirPort(destinationCode).AirportName} ");
ReturnMinPath(currentAirport);
return;
// ReturnMinPath();
}
var x = openSet.Dequeue(); // openSet.(currentAirport);
// Console.WriteLine($"{x.IATA} ------- {x.Current.CountryName}");
closedSet.Enqueue(x);
//Console.WriteLine($"Number of neighbours ={currentAirport.adjacementList.Count}");
foreach (var neighbourNode in currentAirport.adjacementList)
{
var neighbourNode1 = AirlineData.GetNextStation(neighbourNode.IATA);
neighbourNode1.previous = currentAirport;
neighbourNode1.PathLengthFromStart = currentAirport.PathLengthFromStart + GetPath(currentAirport.Current, AirlineData.GetAirPort(destinationCode)); // виглядає дивно, працює швидко, результат коректний
//neighbourNode1.PathLengthFromStart = currentAirport.PathLengthFromStart + GetPath(currentAirport.Current, AirlineData.GetAirPort(neighbourNode.IATA)); // виглядає правильніше, працює довше, результат коректний
neighbourNode1.HeuristicEstimatePathLength = GetPath(neighbourNode1.Current, AirlineData.GetAirPort(destinationCode));
if (closedSet.Count(node => node.IATA == neighbourNode1.IATA) > 0)
{
continue;
}
var openNode = openSet.FirstOrDefault(node => node.IATA == neighbourNode1.IATA);
if (openNode == null)
{
openSet.Enqueue(neighbourNode1);
}
else
{
if (openNode.PathLengthFromStart > neighbourNode1.PathLengthFromStart)
{
openNode.previous = currentAirport;
openNode.PathLengthFromStart = neighbourNode1.PathLengthFromStart;
}
}
}
}
Console.WriteLine($"There is no way from airport with name {source.AirportName} to airport {AirlineData.GetAirPort(destinationCode).AirportName}");
return;
}
protected static internal Airport CreateAirport(string[] temp)
{
airport = new Airport(temp);
return(airport);
}
protected static internal void DijkstraMinPath(string sourceCode, string destinationCode)
{
try
{
AirlineData.LoadData();
var dictOfNeighboursByCode = AirlineData.DictOfNeighbours;
var watch = Stopwatch.StartNew();
var priotityQueue = new Queue <NextAirport>();
List <string> visited = new List <string>();
var path = new Dictionary <NextAirport, NextAirport>();
Airport source = AirlineData.GetAirPort(sourceCode);
var next = AirlineData.GetNextStation(sourceCode);
next.Weight = 0;//sorce
priotityQueue.Enqueue(next);
Graph.Source = next;
double BestPrice = 0;
path[next] = null;
while (priotityQueue.Count > 0)
{
var _flight = priotityQueue.Dequeue();
if (_flight.Current.IATA == destinationCode)
{
watch.Stop();
Graph.Destination = _flight;
Graph.Path = path;
Console.WriteLine("Time spended {0}", watch.ElapsedMilliseconds);
Console.WriteLine("Count of visited vertices = {0}", visited.Count);
ReturnMinPath();
return;
}
visited.Add(_flight.IATA);
foreach (var neighbour in _flight.adjacementList)
{
if (neighbour != null)
{
NextAirport _next = dictOfNeighboursByCode[neighbour.IATA];
if (!visited.Contains(neighbour.IATA) && _next != null)
{
var best = GetPriceByPath(_flight.IATA, neighbour.IATA) + _flight.Weight;//maybe best price
if (best < _next.Weight)
{
_next.Weight = best;
priotityQueue.Enqueue(_next);
path[_next] = _flight;
SortQueue(ref priotityQueue);
}
}
}
}
}
Console.ReadKey();
}
catch (Exception r)
{
Console.WriteLine(r);
}
}