public static void initTraverseDijkstra(int sourceGraphIndex, int destinationGraphIndex)
{
List <int> visitedIndex;
int[,] distanceTable;
visitedIndex = new List <int>();
distanceTable = new int[size, 2];//the first column will have the distance of that node from the starting node, the second column is the index of the node that came before it.
for (int i = 0; i < size; i++)
{
distanceTable[i, 0] = int.MaxValue;
distanceTable[i, 1] = -1;
}
distanceTable[sourceGraphIndex, 0] = 0; //Distance from the starting station from the starting station is 0, thus setting it.
int currentNodeIndex = sourceGraphIndex;
//while (visitedIndex.Count < size)
//{
// currentNodeIndex = TraverseDijkstra(currentNodeIndex);
//}
TraverseDijkstraRecursive(distanceTable, visitedIndex, currentNodeIndex);
for (int i = 0; i < size; i++)
{
Console.WriteLine("{0} - Distance:{1} - Comes From:{2}", i, distanceTable[i, 0], distanceTable[i, 1]);
}
List <int> routeGraphIndex = new List <int>()
{
destinationGraphIndex
};
int currentIndex = destinationGraphIndex;
while (currentIndex != sourceGraphIndex)
{
currentIndex = distanceTable[currentIndex, 1];
routeGraphIndex.Add(currentIndex);
}
routeGraphIndex.Reverse();
List <Station> routeStation = new List <Station>();
foreach (int gI in routeGraphIndex)
{
routeStation.Add(SearchByStationGraphIndex(gI));
}
//int startIndex = -1;
//int endIndex = -1;
//string lineCd = "";
//int lineCdIdx = -1;
//int nextLineCdIdx = -1;
//int nextStartIndex = -1;
//for (int idx = 0; idx < routeStation.Count; idx++)
//{
// bool matchFound = false;
// if (idx == 0)
// {
// if (routeStation[idx].IsInterchange)
// {
// List<string> stationLineCd = new List<string>();
// foreach(string statCd in routeStation[idx].StationCode)
// {
// stationLineCd.Add(statCd.Substring(0, 2));
// }
// foreach(string statCd in routeStation[1].StationCode)
// {
// if (stationLineCd.Contains(statCd.Substring(0, 2)))
// {
// lineCd = statCd.Substring(0, 2);
// }
// }
// lineCdIdx = Guide.GetIndexOfLine(lineCd);
// }
// else
// {
// lineCdIdx = Guide.GetIndexOfLine(routeStation[idx].StationCode[0].Substring(0, 2));
// }
// startIndex = Guide.GetStationIndexFromLine(lineCdIdx, routeStation[idx].StationName);
// }
// else if (idx == (routeStation.Count - 1))
// {
// if (routeStation[idx].IsInterchange)
// {
// List<string> stationLineCd = new List<string>();
// foreach (string statCd in routeStation[idx].StationCode)
// {
// stationLineCd.Add(statCd.Substring(0, 2));
// }
// foreach (string statCd in routeStation[routeStation.Count - 2].StationCode)
// {
// if (stationLineCd.Contains(statCd.Substring(0, 2)))
// {
// lineCd = statCd.Substring(0, 2);
// }
// }
// lineCdIdx = Guide.GetIndexOfLine(lineCd);
// }
// else
// {
// lineCdIdx = Guide.GetIndexOfLine(routeStation[idx].StationCode[0].Substring(0, 2));
// }
// endIndex = Guide.GetStationIndexFromLine(lineCdIdx, routeStation[idx].StationName);
// }
// else
// {
// if (routeStation[idx].IsInterchange)
// {
// List<string> statLineCd = new List<string>();
// foreach (string statCd in routeStation[idx-1].StationCode)
// {
// statLineCd.Add(statCd.Substring(0, 2));
// }
// foreach (string statCd in routeStation[idx+1].StationCode)
// {
// bool contains = statLineCd.Contains(statCd.Substring(0, 2));
// if (contains)
// {
// matchFound = true;
// }
// }
// if (!matchFound)
// {
// endIndex = Guide.GetStationIndexFromLine(lineCdIdx,routeStation[idx].StationName);
// List<string> stationLineCd = new List<string>();
// foreach (string statCd in routeStation[idx].StationCode)
// {
// stationLineCd.Add(statCd.Substring(0, 2));
// }
// foreach (string statCd in routeStation[idx+1].StationCode)
// {
// if (stationLineCd.Contains(statCd.Substring(0, 2)))
// {
// lineCd = statCd.Substring(0, 2);
// }
// }
// nextLineCdIdx = Guide.GetIndexOfLine(lineCd);
// nextStartIndex = Guide.GetStationIndexFromLine(nextLineCdIdx, routeStation[idx].StationName);
// }
// }
// }
// if (matchFound)
// {
// continue;
// }
// if ((startIndex != -1) &&(endIndex != -1)&&(lineCdIdx != -1))
// {
// Guide.DisplayFindPath(lineCdIdx, startIndex, endIndex);
// lineCdIdx = nextLineCdIdx;
// startIndex = nextStartIndex;
// endIndex = -1;
// }
//}
List <string> routeStationCd = new List <string>();
for (int idx = 0; idx < routeStation.Count; idx++)
{
string prevStatLineCd = "";
string nextStatLineCd = "";
if ((idx == 0) && (routeStation[idx].IsInterchange))
{
List <string> stationLineCd = new List <string>();
foreach (string statCd in routeStation[idx].StationCode)
{
stationLineCd.Add(statCd.Substring(0, 2));
}
foreach (string statCd in routeStation[idx + 1].StationCode)
{
if (stationLineCd.Contains(statCd.Substring(0, 2)))
{
nextStatLineCd = statCd.Substring(0, 2);
}
}
foreach (string statCd in routeStation[idx].StationCode)
{
if (statCd.Contains(nextStatLineCd))
{
routeStationCd.Add(statCd);
}
}
}
else if ((idx == routeStation.Count - 1) && (routeStation[idx].IsInterchange))
{
List <string> stationLineCd = new List <string>();
foreach (string statCd in routeStation[idx].StationCode)
{
stationLineCd.Add(statCd.Substring(0, 2));
}
foreach (string statCd in routeStation[idx - 1].StationCode)
{
if (stationLineCd.Contains(statCd.Substring(0, 2)))
{
prevStatLineCd = statCd.Substring(0, 2);
}
}
foreach (string statCd in routeStation[idx].StationCode)
{
if (statCd.Contains(prevStatLineCd))
{
routeStationCd.Add(statCd);
}
}
}
else if (routeStation[idx].IsInterchange)
{
List <string> stationLineCd = new List <string>();
foreach (string statCd in routeStation[idx].StationCode)
{
stationLineCd.Add(statCd.Substring(0, 2));
}
foreach (string statCd in routeStation[idx - 1].StationCode)
{
if (stationLineCd.Contains(statCd.Substring(0, 2)))
{
prevStatLineCd = statCd.Substring(0, 2);
}
}
foreach (string statCd in routeStation[idx + 1].StationCode)
{
if (stationLineCd.Contains(statCd.Substring(0, 2)))
{
nextStatLineCd = statCd.Substring(0, 2);
}
}
foreach (string statCd in routeStation[idx].StationCode)
{
if (statCd.Contains(prevStatLineCd))
{
routeStationCd.Add(statCd);
}
}
if (!prevStatLineCd.Equals(nextStatLineCd))
{
foreach (string statCd in routeStation[idx].StationCode)
{
if (statCd.Contains(nextStatLineCd))
{
routeStationCd.Add(statCd);
}
}
}
}
else
{
routeStationCd.Add(routeStation[idx].StationCode[0]);
}
}
string outputRoute = string.Format("Display Route from {0} to {1} - Taking {2} stations\r\n", routeStation[0].StationName, routeStation[routeStation.Count - 1].StationName, routeStation.Count);
outputRoute += "Start of Route\r\n";
foreach (string statCd in routeStationCd)
{
outputRoute += string.Format("{0} - {1}\r\n", statCd, Guide.SearchByStationCd(statCd).StationName);
}
outputRoute += "End of Route";
Console.WriteLine(outputRoute);
}
public static void TestGraphRoute()
{
bool repeat = true;
while (repeat)
{
Console.Write("Please enter the boarding station code: ");
string boardingStationCd = Console.ReadLine();
Console.Write("Please enter the alighting station code: ");
string alightingStationCd = Console.ReadLine();
initTraverseDijkstra(Guide.SearchByStationCd(boardingStationCd).GraphIndex, Guide.SearchByStationCd(alightingStationCd).GraphIndex);
Console.Write("New Route? (Y/N)");
char response = char.Parse(Console.ReadLine().ToUpper());
switch (response)
{
case 'Y':
repeat = true;
break;
case 'N':
repeat = false;
break;
}
}
}
