/// <summary>
/// reads from a file then finds a path between every point in the file
/// k points in file = k(k-1)/2 paths
/// Creates output file for each implementation with the average time for each path
/// </summary>
/// <param name="pf"></param>
private static AlgorithmTestResults TestPathFinder(PathFinder pf)
{
AlgorithmTestResults resultsList = new AlgorithmTestResults(pf.GetAbbreivatedName());
List <StartDestinationPair> testPoints = ReadPointFile(pf.Graph.TestPointsPath);
string outputPath = System.IO.Path.Combine("output", DateTime.Now.ToString(pf.Graph.Name + "yyyyMMdd_hhmmss") + pf.GetType().Name + ".txt");
if (!System.IO.Directory.Exists("output"))
{
System.IO.Directory.CreateDirectory("output");
}
using (System.IO.TextWriter tw = new System.IO.StreamWriter(outputPath, false))
{
double totalRunTime = 0;
int successfullPathsFound = 0;
foreach (var startDestinationPair in testPoints)
{
float pathLength = 0;
var sw = new Stopwatch();
Vertex startVertex = pf.FindClosestVertex(startDestinationPair.Start);
Vertex destinationVertex = pf.FindClosestVertex(startDestinationPair.Destination);
sw.Start();
var path = pf.FindShortestPath(startVertex, destinationVertex, ref pathLength);
sw.Stop();
pf.ResetGraph();
string msg = null;
double elapsedTime = sw.Elapsed.TotalSeconds;
if (path != null && path.Count > 0)
{
totalRunTime += elapsedTime;
successfullPathsFound++;
msg = startDestinationPair.ToString() + "Completed in " + elapsedTime.ToString() + " seconds." + " with path length = " + pathLength + " vertex count = " + path.Count;
}
else
{
msg = startDestinationPair.ToString() + "Failed to find path in " + elapsedTime.ToString() + " seconds.";
}
tw.WriteLine(pf.GetType().Name + " " + msg);
if (path != null)
{
resultsList.AddTestResult(new TestResults(elapsedTime, path.Count));
}
else
{
resultsList.AddTestResult(new TestResults(elapsedTime, -1));
}
}
tw.WriteLine("Average Runtime(sec) = " + totalRunTime / successfullPathsFound + " Failed Paths = " + (testPoints.Count - successfullPathsFound));
}
return(resultsList);
}
public void AddAlgorithmTestResult(AlgorithmTestResults atr)
{
atr.CalculateIntervalRuntimes();
this.AlgorithmTestResults.Add(atr);
}