private void FileLoaderButton_Click(object sender, RoutedEventArgs e)
{
var openFileDialog = new OpenFileDialog();
openFileDialog.DefaultExt = ".txt";
openFileDialog.Filter = "Text Files (*.txt)|*.txt";
var result = openFileDialog.ShowDialog();
if (result == true)
{
var filePath = openFileDialog.FileName;
FileLoaderLabel.Content = $"Loading file...";
FileLoader fileLoader = new FileLoader();
fileLoaderResult = fileLoader.LoadFile(filePath, isAStarSelected);
string labelText;
if (!fileLoaderResult.IsLoadingSuccess)
{
MessageBox.Show("An error occured while loading a file, try again", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
AlghorithmAButton.IsEnabled = false;
labelText = "Loading error";
}
else
{
var message = $"Successfully loaded file {Path.GetFileName(filePath)}.\n" +
$"Amount of cities: {fileLoaderResult.CityAmount}, connections: {fileLoaderResult.ConnectionsAmount}\n" +
$"Time taken: {fileLoaderResult.LoadTime}ms";
MessageBox.Show(message, "Success", MessageBoxButton.OK, MessageBoxImage.Information);
outputFileName = Path.GetFileName(filePath).Replace("in", "out");
outputFilePath = Path.Combine(Path.GetDirectoryName(filePath), outputFileName);
AlghorithmAButton.IsEnabled = true;
labelText = "Loading complete!";
}
algorithmsTimes.Clear();
FileLoaderLabel.Content = labelText;
}
}
AlghorithmCalculationResult IAlghorithm.CalculateRoute(FileLoaderResult fileLoaderResult)
{
var arraysLength = fileLoaderResult.CityAmount + 1;
var distanceArray = new Dictionary <int, BFSDistanceVertex>();
var predecessorsArray = new int[arraysLength];
var searchedCitiesQueue = new Queue <int>(arraysLength);
var startCity = fileLoaderResult.StartCity;
var endCity = fileLoaderResult.EndCity;
for (int i = 1; i <= arraysLength; ++i)
{
distanceArray.Add(i, new BFSDistanceVertex(int.MaxValue, int.MaxValue));
}
distanceArray[startCity] = new BFSDistanceVertex(0, 0);
searchedCitiesQueue.Enqueue(startCity);
while (searchedCitiesQueue.Count != 0)
{
var currentlySearchedCity = searchedCitiesQueue.Dequeue();
foreach (var neighbour in fileLoaderResult.IncidenceList[currentlySearchedCity])
{
var newPossibleDistance = distanceArray[currentlySearchedCity].DistanceInCities + 1;
var currentDistanceToNeighbour = distanceArray[neighbour.ConnectedCity].DistanceInCities;
if (currentDistanceToNeighbour >= newPossibleDistance)
{
var newRealPossibleDistance = distanceArray[currentlySearchedCity].RealDistance + neighbour.Distance;
var currentRealDistance = distanceArray[neighbour.ConnectedCity].RealDistance;
if (currentRealDistance > newRealPossibleDistance)
{
searchedCitiesQueue.Enqueue(neighbour.ConnectedCity);
distanceArray[neighbour.ConnectedCity].DistanceInCities = newPossibleDistance;
distanceArray[neighbour.ConnectedCity].RealDistance = newRealPossibleDistance;
predecessorsArray[neighbour.ConnectedCity] = currentlySearchedCity;
}
}
}
}
var path = new List <int>();
path.Add(endCity);
var pathReadCurrentCity = predecessorsArray[endCity];
path.Add(pathReadCurrentCity);
do
{
pathReadCurrentCity = predecessorsArray[pathReadCurrentCity];
path.Add(pathReadCurrentCity);
} while (pathReadCurrentCity != startCity);
return(new BFSResult(path.Count - 2, distanceArray[endCity].RealDistance, path));
}
public AlghorithmCalculationResult CalculateRoute(FileLoaderResult fileLoaderResult)
{
var incidenceList = fileLoaderResult.IncidenceList;
var arraysLength = fileLoaderResult.CityAmount + 1;
var visitedArray = new bool[arraysLength];
var distancesArray = new int[arraysLength];
var predecessorsArray = new int[arraysLength];
var isAlreadyAddedInCityDistances = new bool[arraysLength];
for (int i = 1; i < arraysLength; ++i)
{
distancesArray[i] = int.MaxValue;
}
var cityDistances = new SortedSet <AlgorithmCity>(new AlgorithmCityComparer());
var startCity = fileLoaderResult.StartCity;
var endCity = fileLoaderResult.EndCity;
cityDistances.Add(new AlgorithmCity(startCity, 0));
distancesArray[startCity] = 0;
while (cityDistances.Count != 0)
{
var currentCity = cityDistances.Min;
cityDistances.Remove(currentCity);
isAlreadyAddedInCityDistances[currentCity.City] = false;
visitedArray[currentCity.City] = true;
foreach (var neighbour in incidenceList[currentCity.City])
{
var possibleNewDistance = currentCity.Distance + neighbour.Distance;
if (possibleNewDistance < distancesArray[neighbour.ConnectedCity])
{
cityDistances.Remove(new AlgorithmCity(neighbour.ConnectedCity, distancesArray[neighbour.ConnectedCity]));
isAlreadyAddedInCityDistances[neighbour.ConnectedCity] = false;
distancesArray[neighbour.ConnectedCity] = possibleNewDistance;
predecessorsArray[neighbour.ConnectedCity] = currentCity.City;
}
if (visitedArray[neighbour.ConnectedCity] == false && isAlreadyAddedInCityDistances[neighbour.ConnectedCity] == false)
{
cityDistances.Add(new AlgorithmCity(neighbour.ConnectedCity, distancesArray[neighbour.ConnectedCity]));
isAlreadyAddedInCityDistances[currentCity.City] = true;
}
}
}
var path = new List <int>();
path.Add(endCity);
var pathReadCurrentCity = predecessorsArray[endCity];
path.Add(pathReadCurrentCity);
do
{
pathReadCurrentCity = predecessorsArray[pathReadCurrentCity];
path.Add(pathReadCurrentCity);
} while (pathReadCurrentCity != startCity);
return(new DijkstraResult(distancesArray[endCity], path));
}
public AlghorithmCalculationResult CalculateRoute(FileLoaderResult fileLoaderResult)
{
var incidenceList = fileLoaderResult.IncidenceList;
var startCity = fileLoaderResult.StartCity;
var endCity = fileLoaderResult.EndCity;
if (fileLoaderResult.CitiesCoordinates == null || fileLoaderResult.CitiesCoordinates.Count != fileLoaderResult.CityAmount)
{
return(new AStarResult(0, new List <int>()));
}
var heuristicValuation = GetHeuristicsValuation(endCity, fileLoaderResult.CitiesCoordinates);
var arraysLength = fileLoaderResult.CityAmount + 1;
var estimatedDistanceArray = new int[arraysLength];
var distancesArray = new int[arraysLength];
for (int i = 0; i < arraysLength; ++i)
{
estimatedDistanceArray[i] = distancesArray[i] = int.MaxValue;
}
var predecessorsArray = new int[arraysLength];
var visitedArray = new bool[arraysLength];
var isAlreadyAddedInCityDistances = new bool[arraysLength];
distancesArray[startCity] = 0;
estimatedDistanceArray[startCity] = heuristicValuation[startCity];
var processedCollection = new SortedSet <AlgorithmCity>(new AlgorithmCityComparer());
processedCollection.Add(new AlgorithmCity(startCity, estimatedDistanceArray[startCity]));
while (processedCollection.Count != 0)
{
var currentCity = processedCollection.Min;
processedCollection.Remove(currentCity);
visitedArray[currentCity.City] = true;
if (currentCity.City == endCity)
{
break;
}
foreach (var neighbour in incidenceList[currentCity.City])
{
var newPossibleDistance = distancesArray[currentCity.City] + neighbour.Distance;
if (newPossibleDistance < distancesArray[neighbour.ConnectedCity])
{
processedCollection.Remove(new AlgorithmCity(neighbour.ConnectedCity, estimatedDistanceArray[neighbour.ConnectedCity]));
isAlreadyAddedInCityDistances[neighbour.ConnectedCity] = false;
distancesArray[neighbour.ConnectedCity] = newPossibleDistance;
estimatedDistanceArray[neighbour.ConnectedCity] = newPossibleDistance + heuristicValuation[neighbour.ConnectedCity];
predecessorsArray[neighbour.ConnectedCity] = currentCity.City;
if (visitedArray[neighbour.ConnectedCity] == false && isAlreadyAddedInCityDistances[neighbour.ConnectedCity] == false)
{
processedCollection.Add(new AlgorithmCity(neighbour.ConnectedCity, estimatedDistanceArray[neighbour.ConnectedCity]));
isAlreadyAddedInCityDistances[neighbour.ConnectedCity] = true;
}
}
}
}
var path = new List <int>();
path.Add(endCity);
var pathReadCurrentCity = predecessorsArray[endCity];
path.Add(pathReadCurrentCity);
do
{
pathReadCurrentCity = predecessorsArray[pathReadCurrentCity];
path.Add(pathReadCurrentCity);
} while (pathReadCurrentCity != startCity);
return(new AStarResult(distancesArray[endCity], path));
}