feat: Paddle Transform Over Network

.vscode/launch.json

@@ -0,0 +1,46 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Start Client",
+      "type": "coreclr",
+      "request": "launch",
+      "preLaunchTask": "build",
+      // If you have changed target frameworks, make sure to update the program path.
+      "program": "${workspaceFolder}/Game/bin/Debug/net8.0/Game.dll",
+      "args": ["127.0.0.1"],
+      "cwd": "${workspaceFolder}",
+      // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+      "console": "internalConsole",
+      "stopAtEntry": false
+    },
+    {
+      "name": ".NET Core Attach",
+      "type": "coreclr",
+      "request": "attach",
+      "processId": "${command:pickProcess}"
+    },
+    {
+      "name": "Start Server",
+      "type": "coreclr",
+      "request": "launch",
+      "preLaunchTask": "build",
+      // If you have changed target frameworks, make sure to update the program path.
+      "program": "${workspaceFolder}/Game/bin/Debug/net8.0/Game.dll",
+      "args": ["server"],
+      "cwd": "${workspaceFolder}",
+      // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+      "console": "internalConsole",
+      "stopAtEntry": false
+    },
+    {
+      "name": ".NET Core Attach",
+      "type": "coreclr",
+      "request": "attach",
+      "processId": "${command:pickProcess}"
+    }
+  ]
+}

Game/.vscode/launch.json

@@ -1,27 +0,0 @@
-{
-  // Use IntelliSense to learn about possible attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "name": ".NET Core Launch (console)",
-      "type": "coreclr",
-      "request": "launch",
-      "preLaunchTask": "build",
-      // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/bin/Debug/net8.0/${workspaceFolderBasename}.dll",
-      "args": [],
-      "cwd": "${workspaceFolder}",
-      // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
-      "console": "internalConsole",
-      "stopAtEntry": false
-    },
-    {
-      "name": ".NET Core Attach",
-      "type": "coreclr",
-      "request": "attach",
-      "processId": "${command:pickProcess}"
-    }
-  ]
-}

Game/Behaviours/PaddleBehaviour.cs

@@ -1,13 +1,15 @@
 using System;
-
+using LiteNetLib.Utils;
 using Microsoft.Xna.Framework.Input;
 
 using Syntriax.Engine.Core;
 using Syntriax.Engine.Input;
+using Syntriax.Engine.Network;
+using Syntriax.Engine.Network.Abstract;
 
 namespace Pong.Behaviours;
 
-public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Speed) : BehaviourOverride
+public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Speed) : NetworkBehaviour
 {
     private Keys Up { get; } = Up;
     private Keys Down { get; } = Down;
@@ -26,10 +28,14 @@ public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Sp
             return;
 
         if (isUpPressed)
-            GameObject.Transform.Position = GameObject.Transform.Position + Vector2D.Up * (float)Time.Elapsed.TotalSeconds * Speed;
+            Move(Vector2D.Up);
         else if (isDownPressed)
-            GameObject.Transform.Position = GameObject.Transform.Position + -Vector2D.Up * (float)Time.Elapsed.TotalSeconds * Speed;
+            Move(-Vector2D.Up);
+    }
 
+    private void Move(Vector2D vectorToMove)
+    {
+        GameObject.Transform.Position = GameObject.Transform.Position + vectorToMove * (float)Time.Elapsed.TotalSeconds * Speed;
         GameObject.Transform.Position = new Vector2D(GameObject.Transform.Position.X, MathF.Max(MathF.Min(GameObject.Transform.Position.Y, High), Low));
     }
 
@@ -54,8 +60,40 @@ public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Sp
         inputs.UnregisterOnRelease(Down, OnDownReleased);
     }
 
-    private void OnUpPressed(IButtonInputs<Keys> inputs, Keys keys) => isUpPressed = true;
-    private void OnUpReleased(IButtonInputs<Keys> inputs, Keys keys) => isUpPressed = false;
-    private void OnDownPressed(IButtonInputs<Keys> inputs, Keys keys) => isDownPressed = true;
-    private void OnDownReleased(IButtonInputs<Keys> inputs, Keys keys) => isDownPressed = false;
+    private void OnUpPressed(IButtonInputs<Keys> inputs, Keys keys) { isUpPressed = true; SendData(new PaddleInputs() { IsUpPressed = isUpPressed, IsDownPressed = isDownPressed, PositionY = Transform.Position.Y }); }
+    private void OnUpReleased(IButtonInputs<Keys> inputs, Keys keys) { isUpPressed = false; SendData(new PaddleInputs() { IsUpPressed = isUpPressed, IsDownPressed = isDownPressed, PositionY = Transform.Position.Y }); }
+    private void OnDownPressed(IButtonInputs<Keys> inputs, Keys keys) { isDownPressed = true; SendData(new PaddleInputs() { IsUpPressed = isUpPressed, IsDownPressed = isDownPressed, PositionY = Transform.Position.Y }); }
+    private void OnDownReleased(IButtonInputs<Keys> inputs, Keys keys) { isDownPressed = false; SendData(new PaddleInputs() { IsUpPressed = isUpPressed, IsDownPressed = isDownPressed, PositionY = Transform.Position.Y }); }
+
+    public override void ReceiveData<T>(T data)
+    {
+        if (data is not PaddleInputs paddleInputs)
+            return;
+
+        Transform.Position = new(Transform.Position.X, paddleInputs.PositionY);
+        isUpPressed = paddleInputs.IsUpPressed;
+        isDownPressed = paddleInputs.IsDownPressed;
+    }
+
+    [System.Serializable]
+    public struct PaddleInputs : INetworkPacket
+    {
+        public float PositionY { get; set; }
+        public bool IsUpPressed { get; set; }
+        public bool IsDownPressed { get; set; }
+
+        public void Deserialize(NetDataReader reader)
+        {
+            PositionY = reader.GetFloat();
+            IsUpPressed = reader.GetBool();
+            IsDownPressed = reader.GetBool();
+        }
+
+        public void Serialize(NetDataWriter writer)
+        {
+            writer.Put(PositionY);
+            writer.Put(IsUpPressed);
+            writer.Put(IsDownPressed);
+        }
+    }
 }

Game/Game.csproj

@@ -21,6 +21,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Apos.Shapes" Version="0.2.3" />
+    <PackageReference Include="LiteNetLib" Version="1.2.0" />
     <PackageReference Include="MonoGame.Framework.DesktopGL" Version="3.8.1.303" />
     <PackageReference Include="MonoGame.Content.Builder.Task" Version="3.8.1.303" />
   </ItemGroup>

Game/GamePong.cs

@@ -1,16 +1,19 @@
 using System;
+
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 
-using Pong.Behaviours;
 using Apos.Shapes;
 
+using Pong.Behaviours;
+using Syntriax.Engine.Network;
+
 using Syntriax.Engine.Core;
 using Syntriax.Engine.Core.Abstract;
 using Syntriax.Engine.Physics2D;
-using Syntriax.Engine.Physics2D.Primitives;
 using Syntriax.Engine.Physics2D.Abstract;
+using Syntriax.Engine.Physics2D.Primitives;
 
 namespace Pong;
 
@@ -64,58 +67,84 @@ public class GamePong : Game
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectCamera = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Camera"); ;
+        string[] commandLineArguments = Environment.GetCommandLineArgs();
+        if (commandLineArguments.Length != 1)
+        {
+            if (commandLineArguments[1].Equals("server", StringComparison.OrdinalIgnoreCase))
+            {
+                gameManager.InstantiateGameObject().BehaviourController.AddBehaviour<NetworkServer>().Start(8888, 2);
+                Window.Title = "Pong - Server";
+            }
+            else
+            {
+                Window.Title = $"Pong - Client -> {commandLineArguments[1]}";
+                gameManager.InstantiateGameObject().BehaviourController.AddBehaviour<NetworkClient>().Connect(commandLineArguments[1], 8888);
+            }
+        }
+        else
+        {
+            gameManager.InstantiateGameObject().BehaviourController.AddBehaviour<NetworkClient>().Connect("127.0.0.1", 8888);
+            Window.Title = $"Pong - Client -> 127.0.0.1";
+        }
+
+        IGameObject gameObjectNetworkManager = gameManager.InstantiateGameObject().SetGameObject("Network Manager"); ;
+        gameObjectNetworkManager.BehaviourController.AddBehaviour<NetworkManager>();
+
+        ////////////////////////////////////////////////////////////////////////////////////
+
+        IGameObject gameObjectCamera = gameManager.InstantiateGameObject().SetGameObject("Camera"); ;
         gameObjectCamera.BehaviourController.AddBehaviour<CameraController>();
         cameraBehaviour = gameObjectCamera.BehaviourController.AddBehaviour<MonoGameCamera2DBehaviour>(graphics);
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectPongManager = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Pong Game Manager");
+        IGameObject gameObjectPongManager = gameManager.InstantiateGameObject().SetGameObject("Pong Game Manager");
         pongManager = gameObjectPongManager.BehaviourController.AddBehaviour<PongManagerBehaviour>(5);
+        pongManager.Id = "pongManager";
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectBall = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Ball");
+        IGameObject gameObjectBall = gameManager.InstantiateGameObject().SetGameObject("Ball");
         gameObjectBall.Transform.SetTransform(position: new Vector2D(0, 0f), scale: new Vector2D(10f, 10f));
 
         gameObjectBall.BehaviourController.AddBehaviour<CircleBehaviour>(new Circle(Vector2D.Zero, 1f));
-        gameObjectBall.BehaviourController.AddBehaviour<BallBehaviour>();
+        gameObjectBall.BehaviourController.AddBehaviour<BallBehaviour>().Id = "ball";
         gameObjectBall.BehaviourController.AddBehaviour<RigidBody2D>();
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectLeftPaddle = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Left Paddle");
+        IGameObject gameObjectLeftPaddle = gameManager.InstantiateGameObject().SetGameObject("Left Paddle");
         gameObjectLeftPaddle.Transform.SetTransform(position: new Vector2D(-468f, 0f), scale: new Vector2D(15f, 60f));
 
-        gameObjectLeftPaddle.BehaviourController.AddBehaviour<PaddleBehaviour>(Keys.W, Keys.S, 228f, -228f, 400f);
+        gameObjectLeftPaddle.BehaviourController.AddBehaviour<PaddleBehaviour>(Keys.W, Keys.S, 228f, -228f, 400f).Id = "leftPaddle";
         gameObjectLeftPaddle.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
         gameObjectLeftPaddle.BehaviourController.AddBehaviour<RigidBody2D>().IsStatic = true;
 
-        IGameObject gameObjectRightPaddle = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Right Paddle");
+        IGameObject gameObjectRightPaddle = gameManager.InstantiateGameObject().SetGameObject("Right Paddle");
         gameObjectRightPaddle.Transform.SetTransform(position: new Vector2D(468f, 0f), scale: new Vector2D(15f, 60f));
-        gameObjectRightPaddle.BehaviourController.AddBehaviour<PaddleBehaviour>(Keys.Up, Keys.Down, 228f, -228f, 400f);
+        gameObjectRightPaddle.BehaviourController.AddBehaviour<PaddleBehaviour>(Keys.Up, Keys.Down, 228f, -228f, 400f).Id = "rightPaddle";
         gameObjectRightPaddle.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
         gameObjectRightPaddle.BehaviourController.AddBehaviour<RigidBody2D>().IsStatic = true;
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectWallTop = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Wall Top");
+        IGameObject gameObjectWallTop = gameManager.InstantiateGameObject().SetGameObject("Wall Top");
         gameObjectWallTop.Transform.SetTransform(position: new Vector2D(0f, 308f), scale: new Vector2D(552f, 20f));
         gameObjectWallTop.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
         gameObjectWallTop.BehaviourController.AddBehaviour<RigidBody2D>().IsStatic = true;
 
-        IGameObject gameObjectWallBottom = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Wall Bottom");
+        IGameObject gameObjectWallBottom = gameManager.InstantiateGameObject().SetGameObject("Wall Bottom");
         gameObjectWallBottom.Transform.SetTransform(position: new Vector2D(0f, -308f), scale: new Vector2D(552f, 20f));
         gameObjectWallBottom.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
         gameObjectWallBottom.BehaviourController.AddBehaviour<RigidBody2D>().IsStatic = true;
 
-        IGameObject gameObjectWallRight = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Wall Right");
+        IGameObject gameObjectWallRight = gameManager.InstantiateGameObject().SetGameObject("Wall Right");
         gameObjectWallRight.Transform.SetTransform(position: new Vector2D(532f, 0f), scale: new Vector2D(20f, 328f));
         gameObjectWallRight.BehaviourController.AddBehaviour<WallScoreBehaviour>((Action)pongManager.ScoreToLeft);
         gameObjectWallRight.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
         gameObjectWallRight.BehaviourController.AddBehaviour<RigidBody2D>().IsStatic = true;
 
-        IGameObject gameObjectWallLeft = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Wall Left");
+        IGameObject gameObjectWallLeft = gameManager.InstantiateGameObject().SetGameObject("Wall Left");
         gameObjectWallLeft.Transform.SetTransform(position: new Vector2D(-532f, 0f), scale: new Vector2D(20f, 328f));
         gameObjectWallLeft.BehaviourController.AddBehaviour<WallScoreBehaviour>((Action)pongManager.ScoreToRight);
         gameObjectWallLeft.BehaviourController.AddBehaviour<ShapeBehaviour>(Shape.Box);
@@ -123,11 +152,11 @@ public class GamePong : Game
 
         ////////////////////////////////////////////////////////////////////////////////////
 
-        IGameObject gameObjectLeftScoreText = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Score Left");
+        IGameObject gameObjectLeftScoreText = gameManager.InstantiateGameObject().SetGameObject("Score Left");
         gameObjectLeftScoreText.Transform.SetTransform(position: new Vector2D(-250f, 250f), scale: Vector2D.One * .25f);
         gameObjectLeftScoreText.BehaviourController.AddBehaviour<TextScoreBehaviour>(true, spriteFont);
 
-        IGameObject gameObjectRightScoreText = gameManager.InstantiateGameObject<GameObject>().SetGameObject("Score Right");
+        IGameObject gameObjectRightScoreText = gameManager.InstantiateGameObject().SetGameObject("Score Right");
         gameObjectRightScoreText.Transform.SetTransform(position: new Vector2D(250f, 250f), scale: Vector2D.One * .25f);
         gameObjectRightScoreText.BehaviourController.AddBehaviour<TextScoreBehaviour>(false, spriteFont);
     }

Game/Network/Abstract/INetworkBehaviour.cs

@@ -0,0 +1,11 @@
+using Syntriax.Engine.Core.Abstract;
+
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkBehaviour : IBehaviour, INetworkEntity
+{
+    bool IsServer { get; }
+    bool IsClient { get; }
+
+    INetworkCommunicator NetworkCommunicator { get; }
+}

Game/Network/Abstract/INetworkCommunicator.cs

@@ -0,0 +1,18 @@
+using LiteNetLib;
+
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkCommunicator
+{
+    event OnPacketReceivedDelegate? OnPacketReceived;
+
+    EventBasedNetListener Listener { get; }
+    NetManager Manager { get; }
+
+    void PollEvents();
+    void Stop();
+
+    void Send<T>(NetworkPacket<T> Data);
+
+    delegate void OnPacketReceivedDelegate(INetworkCommunicator sender, object packet);
+}

Game/Network/Abstract/INetworkCommunicatorClient.cs

@@ -0,0 +1,6 @@
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkCommunicatorClient : INetworkCommunicator
+{
+    void Connect(string address, int port, string? password = null);
+}

Game/Network/Abstract/INetworkCommunicatorServer.cs

@@ -0,0 +1,10 @@
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkCommunicatorServer : INetworkCommunicator
+{
+    string Password { get; }
+    int MaxConnectionCount { get; }
+    int Port { get; }
+
+    void Start(int port, int maxConnectionCount, string? password = null);
+}

Game/Network/Abstract/INetworkEntity.cs

@@ -0,0 +1,12 @@
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkEntity
+{
+    event OnNetworkIdChangedDelegate? OnNetworkIdChanged;
+
+    uint NetworkId { get; set; }
+
+    void ReceiveData<T>(T data);
+
+    delegate void OnNetworkIdChangedDelegate(INetworkEntity sender, uint previousId);
+}

Game/Network/Abstract/INetworkManager.cs

@@ -0,0 +1,10 @@
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkManager
+{
+    // Action<IGameObject>? OnNetworkGameObjectInstantiated { get; set; }
+
+    INetworkCommunicator NetworkCommunicator { get; }
+
+    // Task<T> Instantiate<T>(params object?[]? args) where T : class, IGameObject;
+}

Game/Network/Abstract/INetworkPacket.cs

@@ -0,0 +1,5 @@
+using LiteNetLib.Utils;
+
+namespace Syntriax.Engine.Network.Abstract;
+
+public interface INetworkPacket : INetSerializable;

Game/Network/Abstract/NetworkPacket.cs

@@ -0,0 +1,7 @@
+namespace Syntriax.Engine.Network.Abstract;
+
+public class NetworkPacket<T>
+{
+    public uint NetworkId { get; set; } = 0;
+    public T Data { get; set; } = default!;
+}

Game/Network/NetworkBase.cs

@@ -0,0 +1,140 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using LiteNetLib;
+using LiteNetLib.Utils;
+
+using Syntriax.Engine.Core;
+using Syntriax.Engine.Network.Abstract;
+
+namespace Syntriax.Engine.Network;
+
+public abstract class NetworkBase : BehaviourOverride, INetworkCommunicator
+{
+    public event INetworkCommunicator.OnPacketReceivedDelegate? OnPacketReceived = null;
+
+    protected readonly NetPacketProcessor netPacketProcessor = new();
+
+    protected readonly Dictionary<uint, INetworkEntity> networkEntities = [];
+
+    protected BehaviourCollector<INetworkEntity> networkEntityCollector = null!;
+
+    public EventBasedNetListener Listener { get; private set; } = null!;
+    public NetManager Manager { get; private set; } = null!;
+
+    public NetworkBase()
+    {
+        Priority = 10;
+
+        Listener = new EventBasedNetListener();
+        Manager = new NetManager(Listener);
+
+        Listener.NetworkReceiveEvent += NetworkReceiveEvent;
+
+        netPacketProcessor.RegisterNestedType<Pong.Behaviours.PaddleBehaviour.PaddleInputs>();
+        RegisterPackets();
+    }
+
+    public void RegisterPackets()
+    {
+        var packetTypes = Assembly.GetExecutingAssembly().GetTypes()
+            .Where(t => typeof(INetworkPacket).IsAssignableFrom(t) && !t.IsInterface)
+            .ToList();
+
+        MethodInfo[] subscribeMethods = netPacketProcessor.GetType()
+            .GetMethods()
+            .Where(m => m.Name == nameof(NetPacketProcessor.SubscribeReusable))
+            .ToArray();
+
+        MethodInfo subscribeMethod = subscribeMethods
+            .FirstOrDefault(m =>
+                m.GetParameters().Length == 1 &&
+                m.GetParameters()[0].ParameterType.GetGenericTypeDefinition() == typeof(Action<,>)
+            ) ?? throw new Exception();
+
+        MethodInfo[] methodInfos = typeof(NetworkBase)
+            .GetMethods(BindingFlags.NonPublic | BindingFlags.Instance);
+
+        MethodInfo method = methodInfos
+            .FirstOrDefault(
+                m => m.Name == nameof(OnPacketArrived) &&
+                m.IsGenericMethodDefinition
+            ) ?? throw new Exception();
+
+        foreach (var packetType in packetTypes)
+        {
+            var networkPacketType = typeof(NetworkPacket<>).MakeGenericType(packetType);
+            MethodInfo genericSubscribe = subscribeMethod.MakeGenericMethod(networkPacketType, typeof(NetPeer));
+
+            Action<object, NetPeer> handler = (packet, peer) =>
+            {
+                MethodInfo handlerMethod = method.MakeGenericMethod(packetType);
+                handlerMethod.Invoke(this, [packet, peer]);
+            };
+            genericSubscribe.Invoke(netPacketProcessor, [handler]);
+        }
+    }
+
+    private void OnPacketArrived<T>(NetworkPacket<T> packet, NetPeer peer) where T : INetworkPacket
+    {
+        if (networkEntities.TryGetValue(packet.NetworkId, out INetworkEntity? entity))
+            entity.ReceiveData(packet.Data);
+
+        OnPacketReceived?.Invoke(this, packet);
+    }
+
+    protected override void OnInitialize()
+    {
+        base.OnInitialize();
+
+        networkEntityCollector = new(GameObject.GameManager);
+        networkEntityCollector.OnCollected += OnNetworkEntityCollected;
+        networkEntityCollector.OnRemoved += OnNetworkEntityRemoved;
+    }
+
+    protected override void OnFinalize()
+    {
+        networkEntityCollector.OnCollected -= OnNetworkEntityCollected;
+        networkEntityCollector.OnRemoved -= OnNetworkEntityRemoved;
+        Stop();
+    }
+
+    private void OnNetworkEntityCollected(BehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourCollected)
+    {
+        if (behaviourCollected.NetworkId != 0)
+            networkEntities.Add(behaviourCollected.NetworkId, behaviourCollected);
+
+        behaviourCollected.OnNetworkIdChanged += OnNetworkIdChanged;
+    }
+
+    private void OnNetworkIdChanged(INetworkEntity sender, uint previousId)
+    {
+        if (networkEntities.TryGetValue(previousId, out INetworkEntity? networkEntity) && sender == networkEntity)
+            networkEntities.Remove(previousId);
+
+        networkEntities.Add(sender.NetworkId, sender);
+    }
+
+    private void OnNetworkEntityRemoved(BehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourRemoved)
+    {
+        networkEntities.Remove(behaviourRemoved.NetworkId);
+        behaviourRemoved.OnNetworkIdChanged -= OnNetworkIdChanged;
+    }
+
+    private void NetworkReceiveEvent(NetPeer peer, NetPacketReader reader, byte channel, DeliveryMethod deliveryMethod)
+    {
+        try
+        {
+            netPacketProcessor.ReadAllPackets(reader, peer);
+        }
+        catch { }
+    }
+
+    public void PollEvents() => Manager.PollEvents();
+    public void Stop() => Manager.Stop();
+
+    protected override void OnUpdate() => PollEvents();
+
+    public abstract void Send<T>(NetworkPacket<T> packet);
+}

Game/Network/NetworkBehaviour.cs

@@ -0,0 +1,52 @@
+using System;
+
+using Syntriax.Engine.Core;
+using Syntriax.Engine.Network.Abstract;
+
+namespace Syntriax.Engine.Network;
+
+public abstract class NetworkBehaviour : BehaviourOverride, INetworkBehaviour
+{
+    public event INetworkEntity.OnNetworkIdChangedDelegate? OnNetworkIdChanged = null;
+
+    private uint _networkId = 0;
+    public uint NetworkId
+    {
+        get => _networkId;
+        set
+        {
+            if (value == _networkId)
+                return;
+
+            uint previousNetworkId = _networkId;
+            _networkId = value;
+            OnNetworkIdChanged?.Invoke(this, previousNetworkId);
+        }
+    }
+
+    public bool IsServer { get; private set; } = false;
+    public bool IsClient { get; private set; } = false;
+
+    public INetworkCommunicator NetworkCommunicator { get; private set; } = null!;
+
+
+    protected override void OnInitialize()
+    {
+        NetworkCommunicator = BehaviourController.GetBehaviourInParent<INetworkCommunicator>()
+                              ?? GameObject.GameManager.FindBehaviour<INetworkCommunicator>()
+                              ?? throw new Exception($"Could not find an {nameof(INetworkCommunicator)}.");
+
+        if (NetworkCommunicator is INetworkCommunicatorClient client)
+        {
+            IsClient = true;
+            return;
+        }
+
+        IsServer = true;
+    }
+
+    public void SendData<T>(T data)
+        => NetworkCommunicator.Send(new NetworkPacket<T>() { NetworkId = _networkId, Data = data });
+
+    public abstract void ReceiveData<T>(T data);
+}

Game/Network/NetworkClient.cs

@@ -0,0 +1,23 @@
+using LiteNetLib.Utils;
+
+using Syntriax.Engine.Network.Abstract;
+
+namespace Syntriax.Engine.Network;
+
+public class NetworkClient : NetworkBase, INetworkCommunicatorClient
+{
+    private readonly NetDataWriter netDataWriter = new();
+
+    public void Connect(string address, int port, string? password = null)
+    {
+        Manager.Start();
+        Manager.Connect(address, port, password ?? string.Empty);
+    }
+
+    public override void Send<T>(NetworkPacket<T> packet)
+    {
+        netDataWriter.Reset();
+        netPacketProcessor.Write(netDataWriter, packet);
+        Manager.FirstPeer.Send(netDataWriter, LiteNetLib.DeliveryMethod.ReliableOrdered);
+    }
+}

Game/Network/NetworkExtensions.cs

@@ -0,0 +1,21 @@
+using LiteNetLib;
+using LiteNetLib.Utils;
+
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Network;
+
+public static class NetworkExtensions
+{
+    public static Vector2D GetVector2D(this NetPacketReader reader)
+        => new(reader.GetFloat(), reader.GetFloat());
+
+    public static void GetVector2D(this NetPacketReader reader, out Vector2D vector2D)
+        => vector2D = new(reader.GetFloat(), reader.GetFloat());
+
+    public static void Put(this NetDataWriter writer, Vector2D vector)
+    {
+        writer.Put(vector.X);
+        writer.Put(vector.Y);
+    }
+}

Game/Network/NetworkManager.cs

@@ -0,0 +1,30 @@
+using Syntriax.Engine.Core;
+
+using Syntriax.Engine.Network.Abstract;
+
+namespace Syntriax.Engine.Network;
+
+public class NetworkManager : NetworkBehaviour, INetworkManager
+{
+    private BehaviourCollector<INetworkEntity> entities = null!;
+
+    private static uint networkIdIndex = 0;
+
+    protected override void OnInitialize()
+    {
+        base.OnInitialize();
+
+        NetworkId = networkIdIndex++;
+
+        entities = new(GameObject.GameManager);
+        foreach (var entity in entities)
+            entity.NetworkId = networkIdIndex++;
+
+        entities.OnCollected += OnCollected;
+    }
+
+    private void OnCollected(BehaviourCollector<INetworkEntity> collector, INetworkEntity entity)
+        => entity.NetworkId = networkIdIndex++;
+
+    public override void ReceiveData<T>(T data) { }
+}

Game/Network/NetworkServer.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Linq;
+using System.Reflection;
+using LiteNetLib.Utils;
+
+using Syntriax.Engine.Network.Abstract;
+
+namespace Syntriax.Engine.Network;
+
+public class NetworkServer : NetworkBase, INetworkCommunicatorServer
+{
+    public string Password { get; private set; } = string.Empty;
+    public int MaxConnectionCount { get; private set; } = 2;
+    public int Port { get; private set; } = 8888;
+
+    private readonly NetDataWriter netDataWriter = new();
+
+    public NetworkServer() : this(8888, 2) { }
+    public NetworkServer(int port, int maxConnectionCount) : base()
+    {
+        MaxConnectionCount = maxConnectionCount;
+        Port = port;
+
+        Listener.ConnectionRequestEvent += request =>
+        {
+            if (Manager.ConnectedPeersCount < maxConnectionCount)
+                request.AcceptIfKey(Password);
+            else
+                request.Reject();
+        };
+
+        OnPacketReceived += ServerOnPacketReceived;
+    }
+
+    public void Start(int port, int maxConnectionCount, string? password = null)
+    {
+        Password = password ?? string.Empty;
+        MaxConnectionCount = maxConnectionCount;
+        Port = port;
+
+        Manager.Start(port);
+    }
+
+    public override void Send<T>(NetworkPacket<T> packet)
+    {
+        netDataWriter.Reset();
+        netPacketProcessor.Write(netDataWriter, packet);
+        Manager.SendToAll(netDataWriter, LiteNetLib.DeliveryMethod.ReliableOrdered);
+    }
+
+    private void ServerOnPacketReceived(INetworkCommunicator sender, object packet)
+    {
+        MethodInfo[] methodInfos = GetType()
+            .GetMethods(BindingFlags.Public | BindingFlags.Instance);
+
+        MethodInfo method = methodInfos
+            .FirstOrDefault(
+                m => m.Name == nameof(Send) && m.IsGenericMethod
+            ) ?? throw new Exception();
+
+        Type typeArguments = packet.GetType().GetGenericArguments()[0];
+
+        MethodInfo methodInfo = method.MakeGenericMethod(typeArguments);
+
+        methodInfo.Invoke(this, [packet]);
+    }
+}