/// <summary>
///
/// </summary>
/// <param name="currentRoom"></param>
/// <param name="exitRoom"></param>
/// <param name="routeLength"></param>
/// <param name="visited"></param>
/// <returns></returns>
private int CalculateShortestRoute(BaseRoom currentRoom, BaseRoom exitRoom, int routeLength, HashSet <BaseRoom> visited)
{
var nextRooms = new Dictionary <BaseRoom, bool>();
foreach (var direction in RoomConnection.Directions)
{
if (!currentRoom.HasConnection(direction))
{
continue;
}
var door = currentRoom.GetConnector(direction) as DoorConnector;
if (door == null)
{
continue;
}
var nextRoom = GetAdjacentRoom(currentRoom, direction);
if (nextRoom == null)
{
continue;
}
if (visited.Contains(nextRoom))
{
continue;
}
if (nextRoom == exitRoom)
{
return(routeLength + (door.IsLocked ? 1 : 0));
}
nextRooms.Add(nextRoom, door.IsLocked);
}
visited.Add(currentRoom);
foreach (var roomEntry in nextRooms)
{
var room = roomEntry.Key;
var doorLocked = roomEntry.Value;
var length = CalculateShortestRoute(room, exitRoom, routeLength + (doorLocked ? 1 : 0), visited);
if (length < int.MaxValue)
{
return(length);
}
}
return(int.MaxValue);
}