//async method for connecting to clients
public static void connect(IAsyncResult ar)
{
try
{
//connection finished, allow others to connect
connectionFound.Set();
Console.WriteLine("\nPlayer connected overworld");
OverworldState state = new OverworldState();
state.Update = new byte[UPDATE_SIZE];
//get socket for client
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
byte[] id = new byte[16];
handler.Receive(id, 16, 0);
state.ClientID = new Guid(id);
Console.WriteLine(state.ClientID.ToString());
state.ClientSocket = handler;
ClientState addSocket;
lock (ConnectedPlayers.DICTIONARY_LOCK)
{
if (ConnectedPlayers.playerDetails.TryGetValue(state.ClientID, out addSocket))
{
addSocket.OverworldSocket = handler;
}
else
{
addSocket = new ClientState(null, handler, null, null);
ConnectedPlayers.playerDetails.Add(state.ClientID, addSocket);
}
}
state.Lat = addSocket.Latitude;
state.Lon = addSocket.Longtitude;
//start receiving client updates
handler.BeginReceive(state.Update, 0, UPDATE_SIZE, 0, new AsyncCallback(readUpdate), state);
}
//catch connection errors
catch (Exception e)
{
//Console.WriteLine(e);
Console.WriteLine("\nPlayer disconnected overworld connect");
}
}
//Process and send nearby data to player
//later on add mechanism to avoid redundant object sending (at least for fixed position objects)
private static void send(OverworldState state)
{
//possibly figure out GPS range and use limited numerical value size to incorporate type of object into the same data size
List <float> nearbyC = new List <float>();
List <Guid> nearbyID = new List <Guid>();
List <byte> nearbyPlayerDetails = new List <byte>();
//place gps coords and object's id in lists to be sent (indexes of latitude must be 2i and longtitude 2i+1 where i is the index of the respective objects guid)
var dbCon = new DatabaseConnect();
dbCon.findNearbyObjects(state.Lat[0], state.Lon[0], nearbyC, nearbyID, nearbyPlayerDetails);
//use latitude to include the type of object it is. Determine if object is a (player, colloseum, landmark) and add (0, 1, 2) * 181 to latitude respectively
//latitudes range is -90 - 90, so by doing this the type of object can be determined without sending additional data (value < 91: player, 90 < value < 272: colloseum, 271 < value: colloseum)
//creates byte aray with proper number of bytes
state.Nearby = new byte[nearbyC.Count * 4 + nearbyID.Count * 16 + nearbyPlayerDetails.Count];
//put nearby coords in byte array to be sent
Buffer.BlockCopy(nearbyC.ToArray(), 0, state.Nearby, 0, nearbyC.Count * 4);
//put respective guids
int i = 0;
foreach (Guid id in nearbyID.ToArray())
{
Buffer.BlockCopy(id.ToByteArray(), 0, state.Nearby, nearbyC.Count * 4 + 16 * i, 16);
i++;
}
Buffer.BlockCopy(nearbyPlayerDetails.ToArray(), 0, state.Nearby, nearbyC.Count * 4 + nearbyID.Count * 16, nearbyPlayerDetails.Count);
//tell client size of update
state.ClientSocket.Send(BitConverter.GetBytes(state.Nearby.Length));
//tell client number of objects
state.ClientSocket.Send(BitConverter.GetBytes(nearbyID.Count));
//send nearby objects to client
state.ClientSocket.Send(state.Nearby, 0, state.Nearby.Length, 0);
}
//read updates from clients
public static void readUpdate(IAsyncResult ar)
{
Socket handler = null;
try
{
//retreive the state object and socket
OverworldState state = (OverworldState)ar.AsyncState;
handler = state.ClientSocket;
ar.AsyncWaitHandle.WaitOne();
if (handler.EndReceive(ar) == 0)
{
Console.WriteLine("\nPlayer disconnected overworld readUpdate");
return;
}
//Console.WriteLine(BitConverter.ToSingle(state.Update, 0));
//process update (GPS coords stored in state.Update) into DB
//var dbCon = new DatabaseConnect();
//dbCon.UpdatePlayerCoor(state.Update, state.ClientID);
state.Lat[0] = BitConverter.ToSingle(state.Update, 0);
state.Lon[0] = BitConverter.ToSingle(state.Update, 4);
//next gps update not expected for long enough that it should probably be more efficient to handle parseing and sending synchronously
//pretty sure asynch calls require a certain amount of memory overhead, can change if need though
send(state);
handler.BeginReceive(state.Update, 0, UPDATE_SIZE, 0, new AsyncCallback(readUpdate), state);
}
//end communications gracefully if player disconnects
catch (Exception e)
{
//Console.WriteLine(e.ToString());
Console.WriteLine("\nPlayer disconnected overworld readUpdate");
}
}