/// <summary>
/// Helper for updating a locally controlled gamer.
/// </summary>
void UpdateLocalGamer(LocalNetworkGamer gamer)
{
// Look up what tank is associated with this local player,
// and read the latest user inputs for it. The server will
// later use these values to control the tank movement.
NetworkPlayer localPlayer = gamer.Tag as NetworkPlayer;
localPlayer.Update();
// Only send if we are not the server. There is no point sending packets
// to ourselves, because we already know what they will contain!
if (!networkSession.IsHost)
{
// Write our latest input state into a network packet.
packetWriter.Write(localPlayer.Position);
// Send our input data to the server.
gamer.SendData(packetWriter,
SendDataOptions.InOrder, networkSession.Host);
}
}
/// <summary>
/// This method only runs on the server. It calls Update on all the
/// tank instances, both local and remote, using inputs that have
/// been received over the network. It then sends the resulting
/// tank position data to everyone in the session.
/// </summary>
void UpdateServer(GameTime gameTime)
{
// First off, our packet will indicate how many tanks it has data for.
packetWriter.Write(networkSession.AllGamers.Count);
// Loop over all the players in the session, not just the local ones!
foreach (NetworkGamer gamer in networkSession.AllGamers)
{
// Look up what tank is associated with this player.
NetworkPlayer player = gamer.Tag as NetworkPlayer;
// Update the tank.
player.Update();
// Write the tank state into the output network packet.
packetWriter.Write(player.Position);
}
// Send the combined data for all tanks to everyone in the session.
LocalNetworkGamer server = (LocalNetworkGamer)networkSession.Host;
server.SendData(packetWriter, SendDataOptions.InOrder);
}