Simple Network Example

Unity Engine
1

I’m just starting out (still using the trial) and I need networking (no single player mode planned), but the docs are somewhat lacking.

Does anyone have a really simple network multiplayer example? Two spheres in a box would do, as long as it shows the networking code on both server and client.

Well, make that an empty box and a sphere spawned for every client that connects. Really, extremely primitive, no FPS code, no explosions, just something that shows a working example of how to init a server, how to init a client and make it connect.

Please?

Now, not in three weeks when my trial period is up?

Please with sugar? :slight_smile:

2

It’s coming. UT has in the past been pretty generous with trial extensions if you have a decent reason to need one… when the example does come out you’ll probably be able to get an extension by emailing them explaining your situation.

3

bump I want that too !! very much

4

I’ll bump this as well.

I’m new, still in the trial and attempting to absorb as much as possible. I’ve found the documentation to be excellent but a networking tutorial would be very helpful.

Thanks.

5

Network tutorial is coming soon as I understand.

6

Within a week or so… Stay tuned! :slight_smile:

7

That’s great news, thanks.

8

Not sure if this is useful or not, but here’s a very short script to do some basic networking including NAT punching. It’s a super simple RPC broadcast to get P2P chat working. Sorry JS guys its in C#.

  1. Paste it into a C# Script called NetworkTest.cs and add it to a GameObject.

  2. Change the P2PGameType and P2PGameName.

EDIT:
3. Add a Network View to the GameObject, turn of state sync and observed to Nothing.

To be a server - click Start Server, then Register with Master Facilitator - wait 3 to 5 seconds and your game should appear below.

To be a client, just click Get Host List. This will connect to the Master Facilitator and get a list of games of the GameType you specified. At the bottom of the list (you may need to scroll) - there is a connect button - click it.

Start typing in the Chat window, and if everything is working OK, all members of session should get the text.

using UnityEngine;
using System.Collections;
using System;

public class NetworkTest : MonoBehaviour
{
    private Rect NTWindowPos;
    private Rect ChatWindowPos;
    private ConnectionTesterStatus natCapable;
    private HostData[] testHD;
    private Vector2 HostListScrollWindowPos;
    private Vector2 ChatHistoryScrollWindowPos;
    private bool PollforHostList = false;
    private string MessageToSend = "";
    private ArrayList ChatHistoryArray;
    private string P2PGameType = "CHANGEME";
    private string P2PGameName = "CHANGEMETOO";

    // Use this for initialization
    void Start()
    {
        NTWindowPos = new Rect(20, 100, 320, 400);
        ChatWindowPos = new Rect(360, 100, 320, 400);
        ChatHistoryArray = new ArrayList();
        ChatHistoryArray.Add("Chat Started at " + DateTime.Now.ToString());
        natCapable = ConnectionTesterStatus.Undetermined;
    }
    IEnumerator PollForHostListUpdates()
    {
        Debug.Log("Polling HostList" + Time.realtimeSinceStartup.ToString());
        MasterServer.RequestHostList(P2PGameType);
        testHD = MasterServer.PollHostList();
        yield return new WaitForSeconds(3);
        PollforHostList = true;
    }
    [RPC]
    void ApplyGlobalChatText(string MessageToAdd)
    {
        ChatHistoryArray.Add(MessageToAdd);
    }
    void OnGUI()
    {

        NTWindowPos = GUI.Window(5, NTWindowPos, DoNetworkTester, "P2P Network Connecter");
        ChatWindowPos = GUI.Window(6, ChatWindowPos, DoChatWindow, "P2P Chat");
    }
    void DoChatWindow(int WindowID)
    {
        GUILayout.BeginVertical();
        GUILayout.Space(25);
        GUILayout.Label("Chat History");
        ChatHistoryScrollWindowPos = GUILayout.BeginScrollView(ChatHistoryScrollWindowPos);
        foreach (object itemStr in ChatHistoryArray)
        {
            GUILayout.Label((string)itemStr);
        }
        GUILayout.EndScrollView();
        GUILayout.BeginHorizontal();
        MessageToSend = GUILayout.TextArea(MessageToSend);
        if (GUILayout.Button("Send", GUILayout.Width(64), GUILayout.Height(64)) || (Event.current.character == char.Parse("\n")  Event.current.type == EventType.keyUp))
        {
            networkView.RPC("ApplyGlobalChatText", RPCMode.All, MessageToSend);
            MessageToSend = "";
        }
        GUILayout.EndHorizontal();
        GUILayout.EndVertical();
        GUI.DragWindow();
    }

    void DoNetworkTester(int WindowID)
    {
        GUILayout.BeginVertical();
        GUILayout.Space(25);
        GUILayout.BeginHorizontal();
        GUILayout.Label("NAT Available: " + natCapable.ToString());
        if (GUILayout.Button("Test NAT")) natCapable = Network.TestConnection();
        GUILayout.EndHorizontal();
        GUILayout.BeginHorizontal();
        GUILayout.Label("PeerType: " + Network.peerType.ToString());
        GUILayout.EndHorizontal();
        
        if (GUILayout.Button("Start Server"))
        {
            Network.useNat = true;
            Network.InitializeServer(32, 25002);
        }
        if (GUILayout.Button("Disconnect"))
        {
            Network.Disconnect(200);
        }
        
        
        if (GUILayout.Button("Register with Master Facilitator"))
        {
            MasterServer.RegisterHost(P2PGameType, P2PGameName);
            PollforHostList = true;
        }
        
        
        if (GUILayout.Button("Check Host List") || PollforHostList)
        {
            StartCoroutine(PollForHostListUpdates());
            PollforHostList = false;
        }
        
        HostListScrollWindowPos = GUILayout.BeginScrollView(HostListScrollWindowPos);
        if (testHD != null)
        {
            foreach (HostData itemHD in testHD)
            {
                GUILayout.BeginVertical();
                GUILayout.Label("Type: " + itemHD.gameType);
                GUILayout.Label("Name: " + itemHD.gameName);
                foreach (string thisIP in itemHD.ip)
                {
                    GUILayout.Label("IP Route: " + thisIP.ToString());
                }
                GUILayout.Label("Port: " + itemHD.port.ToString());
                GUILayout.Label("NAT Enabled: " + itemHD.useNat.ToString());
                GUILayout.Label("Players: " + itemHD.connectedPlayers.ToString() + "/" + itemHD.playerLimit.ToString());
                GUILayout.Label("Password: " + itemHD.passwordProtected.ToString());
                GUILayout.Label("Comment: " + itemHD.comment);
                if (GUILayout.Button("Connect"))
                {
                    //Network.useNat = true;
                    Network.Connect(itemHD.ip, itemHD.port);
                }
                GUILayout.EndVertical();
            }
        }
        GUILayout.EndScrollView();
        GUILayout.EndVertical();
        GUI.DragWindow();
    }
}
9

Wow shaun thank you !!! – this is what I’ve been looking for.

I can get two machines to almost talk to each other, but not quite –

I can start a server, and register it, and connect with the other machine – the display shows two machines on the server – but nothing happens on either machine when I type.

is this a network view problem I wonder???

EDIT: All I needed to do was attach a network view component to the gameobject with the script.

Thanks again shaun… some of you guys can put this stuff together without working examples, but I’m just a dumb right-brainer. I need a working example to take apart and learn from…

10

HiggyB =-

within a week or so? w00t w00t

Merry Christmas EvErYoNe!!!

11

Unclet: you’re absolutely right. thanks :slight_smile:
I’ve updated the post with the additional step.

EDIT:
After getting some further infomation, I realize that Network.TestConnection is an asynchronous function, which means you must keep calling it until it returns a value. Once it returns a value, it wont test again, unless you set the forceTest paramter to true. So, keep clicking that Test NAT button, or copy the connection testing code into OnGUI and set forceTest=true in the button code :wink: