public static PathNode ShortestPath(BotMap map, BotTerritory source, BotTerritory destination)
{
List <PathNode> seenTerr = new List <PathNode>();
PathVector unseenTerr = new PathVector();
foreach (BotTerritory terr in map.Territories.Values)
{
if (terr.ID == source.ID)
{
unseenTerr.Insert(0, new PathNode(terr));
unseenTerr.nodes[0].minDistance = 0;
}
else
{
unseenTerr.Add(new PathNode(terr));
}
}
while (unseenTerr.Contains(destination.ID))
{
PathNode pointer = unseenTerr.nodes[0];
foreach (TerritoryIDType terrId in pointer.adjacent)
{
int numArmies = map.Territories[terrId].Armies.NumArmies;
if (numArmies == 0)
{
numArmies = 4;
}
if (unseenTerr.Contains(terrId) && unseenTerr.GetNode(terrId).minDistance > (pointer.minDistance + numArmies))
{
PathNode temp = unseenTerr.GetNode(terrId);
temp.minDistance = pointer.minDistance + numArmies;
temp.minPath = new List <TerritoryIDType>(pointer.minPath);
temp.minPath.Add(pointer.territory);
}
}
seenTerr.Add(unseenTerr.Remove(pointer.territory));
Quicksort.QuicksortPath(ref unseenTerr, 0, unseenTerr.nodes.Count);
}
return(seenTerr.Last());
}
public static void QuicksortPath(ref PathVector vector, int from, int to)
{
if (to - from < 2 || vector == null)
{
return;
}
int pointer = from;
for (int i = from + 1; i < to; i++)
{
if (vector.nodes[from].minDistance > vector.nodes[i].minDistance)
{
Swap(++pointer, i, ref vector.nodes);
}
}
Swap(pointer, from, ref vector.nodes);
QuicksortPath(ref vector, from, pointer);
QuicksortPath(ref vector, pointer + 1, to);
}
