Updated Multiplayer Pong C# to Godot 4.2 (#1045)

mono/multiplayer_pong/Pong Multiplayer with C#.csproj

@@ -1,6 +1,9 @@
-<Project Sdk="Godot.NET.Sdk/4.0.0-dev5">
+<Project Sdk="Godot.NET.Sdk/4.2.0">
   <PropertyGroup>
-    <TargetFramework>net472</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
-    <RootNamespace>PongMultiplayer</RootNamespace>
+    <TargetFramework Condition=" '$(GodotTargetPlatform)' == 'android' ">net7.0</TargetFramework>
+    <TargetFramework Condition=" '$(GodotTargetPlatform)' == 'ios' ">net8.0</TargetFramework>
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+    <RootNamespace>PongMultiplayerwithC</RootNamespace>
   </PropertyGroup>
 </Project>

mono/multiplayer_pong/Pong Multiplayer with C#.sln

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2012
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pong Multiplayer with C#", "Pong Multiplayer with C#.csproj", "{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pong Multiplayer with C#", "Pong Multiplayer with C#.csproj", "{58FECEC2-0618-4042-81F2-4EDD7982C229}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -9,11 +9,11 @@ Global
 	ExportRelease|Any CPU = ExportRelease|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.ExportDebug|Any CPU.ActiveCfg = ExportDebug|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.ExportDebug|Any CPU.ActiveCfg = ExportDebug|Any CPU
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.ExportDebug|Any CPU.Build.0 = ExportDebug|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.ExportDebug|Any CPU.Build.0 = ExportDebug|Any CPU
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.ExportRelease|Any CPU.ActiveCfg = ExportRelease|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.ExportRelease|Any CPU.ActiveCfg = ExportRelease|Any CPU
-		{4BB6C2D0-FC11-466E-8C73-8DAD689F135A}.ExportRelease|Any CPU.Build.0 = ExportRelease|Any CPU
+		{58FECEC2-0618-4042-81F2-4EDD7982C229}.ExportRelease|Any CPU.Build.0 = ExportRelease|Any CPU
 	EndGlobalSection
 EndGlobal

mono/multiplayer_pong/lobby.tscn

@@ -1,8 +1,10 @@
-[gd_scene load_steps=2 format=2]
+[gd_scene load_steps=2 format=3 uid="uid://bxj0km4t28u17"]
 
-[ext_resource path="res://logic/Lobby.cs" type="Script" id=1]
+[ext_resource type="Script" path="res://logic/Lobby.cs" id="1"]
 
 [node name="Lobby" type="Control"]
+layout_mode = 3
+anchors_preset = 8
 anchor_left = 0.5
 anchor_top = 0.5
 anchor_right = 0.5
@@ -11,13 +13,13 @@ offset_left = -320.0
 offset_top = -200.0
 offset_right = 320.0
 offset_bottom = 200.0
+grow_horizontal = 2
+grow_vertical = 2
 size_flags_horizontal = 2
 size_flags_vertical = 2
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="Title" type="Label" parent="."]
+layout_mode = 0
 offset_left = 210.0
 offset_top = 40.0
 offset_right = 430.0
@@ -25,22 +27,19 @@ offset_bottom = 80.0
 size_flags_horizontal = 2
 size_flags_vertical = 0
 text = "Multiplayer Pong"
-align = 1
-valign = 1
 
 [node name="LobbyPanel" type="Panel" parent="."]
+layout_mode = 0
 offset_left = 210.0
 offset_top = 160.0
 offset_right = 430.0
 offset_bottom = 270.0
 size_flags_horizontal = 2
 size_flags_vertical = 2
-script = ExtResource( 1 )
+script = ExtResource("1")
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="AddressLabel" type="Label" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 10.0
 offset_top = 10.0
 offset_right = 62.0
@@ -50,6 +49,7 @@ size_flags_vertical = 0
 text = "Address"
 
 [node name="Address" type="LineEdit" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 10.0
 offset_top = 30.0
 offset_right = 210.0
@@ -59,6 +59,7 @@ size_flags_vertical = 2
 text = "127.0.0.1"
 
 [node name="HostButton" type="Button" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 10.0
 offset_top = 60.0
 offset_right = 90.0
@@ -68,6 +69,7 @@ size_flags_vertical = 2
 text = "Host"
 
 [node name="JoinButton" type="Button" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 130.0
 offset_top = 60.0
 offset_right = 210.0
@@ -75,29 +77,24 @@ offset_bottom = 80.0
 size_flags_horizontal = 2
 size_flags_vertical = 2
 text = "Join"
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="StatusOk" type="Label" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 10.0
 offset_top = 90.0
 offset_right = 210.0
 offset_bottom = 104.0
 size_flags_horizontal = 2
 size_flags_vertical = 0
-custom_colors/font_color = Color(0, 1, 0.015625, 1)
-align = 1
 
 [node name="StatusFail" type="Label" parent="LobbyPanel"]
+layout_mode = 0
 offset_left = 10.0
 offset_top = 90.0
 offset_right = 210.0
 offset_bottom = 104.0
 size_flags_horizontal = 2
 size_flags_vertical = 0
-custom_colors/font_color = Color(1, 0, 0, 1)
-align = 1
 
 [connection signal="pressed" from="LobbyPanel/HostButton" to="LobbyPanel" method="OnHostPressed"]
 [connection signal="pressed" from="LobbyPanel/JoinButton" to="LobbyPanel" method="OnJoinPressed"]

mono/multiplayer_pong/logic/Ball.cs

@@ -7,7 +7,7 @@ public partial class Ball : Area2D
 
     private Vector2 _direction = Vector2.Left;
     private bool _stopped = false;
-    private float _speed = DefaultSpeed;
+    private double _speed = DefaultSpeed;
     private Vector2 _screenSize;
 
     // Called when the node enters the scene tree for the first time.
@@ -17,7 +17,7 @@ public partial class Ball : Area2D
     }
 
     // Called every frame. 'delta' is the elapsed time since the previous frame.
-    public override void _Process(float delta)
+    public override void _Process(double delta)
     {
         _speed += delta;
         // Ball will move normally for both players,
@@ -25,36 +25,36 @@ public partial class Ball : Area2D
         // so each player sees the motion as smooth and not jerky.
         if (!_stopped)
         {
-            Translate(_speed * delta * _direction);
+            Translate((float)(_speed * delta) * _direction);
         }
 
         // Check screen bounds to make ball bounce.
         var ballPosition = Position;
-        if ((ballPosition.y < 0 && _direction.y < 0) || (ballPosition.y > _screenSize.y && _direction.y > 0))
+        if ((ballPosition.Y < 0 && _direction.Y < 0) || (ballPosition.Y > _screenSize.Y && _direction.Y > 0))
         {
-            _direction.y = -_direction.y;
+            _direction.Y = -_direction.Y;
         }
 
-        if (IsNetworkMaster())
+        if (IsMultiplayerAuthority())
         {
-            // Only the master will decide when the ball is out in
+            // Only the server (Multiplayer Authority) will decide
-            // the left side (it's own side). This makes the game
+            // when the ball is out in the left side (it's own side).
-            // playable even if latency is high and ball is going
+            // This makes the game playable even if latency is high and
-            // fast. Otherwise ball might be out in the other
+            // ball is going fast. Otherwise ball might be out in the other
             // player's screen but not this one.
-            if (ballPosition.x < 0)
+            if (ballPosition.X < 0)
             {
                 GetParent().Rpc("UpdateScore", false);
                 Rpc("ResetBall", false);
             }
             else
             {
-                // Only the puppet will decide when the ball is out in
+                // Only the peer will decide when the ball is out in
                 // the right side, which is it's own side. This makes
                 // the game playable even if latency is high and ball
                 // is going fast. Otherwise ball might be out in the
                 // other player's screen but not this one.
-                if (ballPosition.x > _screenSize.x)
+                if (ballPosition.X > _screenSize.X)
                 {
                     GetParent().Rpc("UpdateScore", true);
                     Rpc("ResetBall", true);
@@ -63,31 +63,31 @@ public partial class Ball : Area2D
         }
     }
 
-    [Sync]
+    [Rpc(mode: MultiplayerApi.RpcMode.AnyPeer, CallLocal = true)]
     private void Bounce(bool left, float random)
     {
         // Using sync because both players can make it bounce.
         if (left)
         {
-            _direction.x = Mathf.Abs(_direction.x);
+            _direction.X = Mathf.Abs(_direction.X);
         }
         else
         {
-            _direction.x = -Mathf.Abs(_direction.x);
+            _direction.X = -Mathf.Abs(_direction.X);
         }
 
         _speed *= 1.1f;
-        _direction.y = random * 2.0f - 1;
+        _direction.Y = random * 2.0f - 1;
         _direction = _direction.Normalized();
     }
 
-    [Sync]
+    [Rpc(mode: MultiplayerApi.RpcMode.AnyPeer, CallLocal = true)]
     private void Stop()
     {
         _stopped = true;
     }
 
-    [Sync]
+    [Rpc(mode: MultiplayerApi.RpcMode.AnyPeer, CallLocal = true)]
     private void ResetBall(bool forLeft)
     {
         Position = _screenSize / 2;

mono/multiplayer_pong/logic/Lobby.cs

@@ -12,7 +12,7 @@ public partial class Lobby : Control
     private Button _joinButton;
     private Label _statusOk;
     private Label _statusFail;
-    private NetworkedMultiplayerENet _peer;
+    private ENetMultiplayerPeer _peer;
 
     public override void _Ready()
     {
@@ -25,11 +25,11 @@ public partial class Lobby : Control
 
         // Connect all callbacks related to networking.
         // Note: Use snake_case when talking to engine API.
-        GetTree().Connect("network_peer_connected", this, nameof(PlayerConnected));
+        GetTree().GetMultiplayer().Connect("peer_connected", new Callable(this, nameof(PlayerConnected)));
-        GetTree().Connect("network_peer_disconnected", this, nameof(PlayerDisconnected));
+        GetTree().GetMultiplayer().Connect("peer_disconnected", new Callable(this, nameof(PlayerDisconnected)));
-        GetTree().Connect("connected_to_server", this, nameof(ConnectedOk));
+        GetTree().GetMultiplayer().Connect("connected_to_server", new Callable(this, nameof(ConnectedOk)));
-        GetTree().Connect("connection_failed", this, nameof(ConnectedFail));
+        GetTree().GetMultiplayer().Connect("connection_failed", new Callable(this, nameof(ConnectedFail)));
-        GetTree().Connect("server_disconnected", this, nameof(ServerDisconnected));
+        GetTree().GetMultiplayer().Connect("server_disconnected", new Callable(this, nameof(ServerDisconnected)));
     }
 
     // Network callbacks from SceneTree
@@ -41,7 +41,7 @@ public partial class Lobby : Control
         var pong = ResourceLoader.Load<PackedScene>("res://pong.tscn").Instantiate();
 
         // Connect deferred so we can safely erase it from the callback.
-        pong.Connect("GameFinished", this, nameof(EndGame), new Godot.Collections.Array(), (int) ConnectFlags.Deferred);
+        pong.Connect("GameFinished", new Callable(this, nameof(EndGame)), (int) ConnectFlags.Deferred);
 
         GetTree().Root.AddChild(pong);
         Hide();
@@ -49,7 +49,7 @@ public partial class Lobby : Control
 
     private void PlayerDisconnected(int id)
     {
-        EndGame(GetTree().IsNetworkServer() ? "Client disconnected" : "Server disconnected");
+        EndGame(GetTree().GetMultiplayer().IsServer() ? "Client disconnected" : "Server disconnected");
     }
 
     // Callback from SceneTree, only for clients (not server).
@@ -63,7 +63,7 @@ public partial class Lobby : Control
     {
         SetStatus("Couldn't connect", false);
 
-        GetTree().NetworkPeer = null; // Remove peer.
+        GetTree().GetMultiplayer().MultiplayerPeer = null; // Remove peer.
         _hostButton.Disabled = false;
         _joinButton.Disabled = false;
     }
@@ -85,7 +85,7 @@ public partial class Lobby : Control
             Show();
         }
 
-        GetTree().NetworkPeer = null; // Remove peer.
+        GetTree().GetMultiplayer().MultiplayerPeer = null; // Remove peer.
         _hostButton.Disabled = false;
         _joinButton.Disabled = false;
 
@@ -109,8 +109,7 @@ public partial class Lobby : Control
 
     private void OnHostPressed()
     {
-        _peer = new NetworkedMultiplayerENet();
+        _peer = new ENetMultiplayerPeer();
-        _peer.CompressionMode = NetworkedMultiplayerENet.CompressionModeEnum.RangeCoder;
         Error err = _peer.CreateServer(DefaultPort, MaxNumberOfPeers);
         if (err != Error.Ok)
         {
@@ -119,7 +118,9 @@ public partial class Lobby : Control
             return;
         }
 
-        GetTree().NetworkPeer = _peer;
+        _peer.Host.Compress(ENetConnection.CompressionMode.RangeCoder);
+
+        GetTree().GetMultiplayer().MultiplayerPeer = _peer;
         _hostButton.Disabled = true;
         _joinButton.Disabled = true;
         SetStatus("Waiting for player...", true);
@@ -134,10 +135,11 @@ public partial class Lobby : Control
             return;
         }
 
-        _peer = new NetworkedMultiplayerENet();
+        _peer = new ENetMultiplayerPeer();
-        _peer.CompressionMode = NetworkedMultiplayerENet.CompressionModeEnum.RangeCoder;
         _peer.CreateClient(ip, DefaultPort);
-        GetTree().NetworkPeer = _peer;
+        _peer.Host.Compress(ENetConnection.CompressionMode.RangeCoder);
+
+        GetTree().GetMultiplayer().MultiplayerPeer = _peer;
         SetStatus("Connecting...", true);
     }
 }

mono/multiplayer_pong/logic/Paddle.cs

@@ -13,16 +13,15 @@ public partial class Paddle : Area2D
 
     public override void _Ready()
     {
-        _screenSizeY = GetViewportRect().Size.y;
+        _screenSizeY = GetViewportRect().Size.Y;
     }
 
-    public override void _Process(float delta)
+    public override void _Process(double delta)
     {
         // Is the master of the paddle.
-        if (IsNetworkMaster())
+        if (IsMultiplayerAuthority())
         {
             _motion = Input.GetActionStrength("move_down") - Input.GetActionStrength("move_up");
-
             if (!_youHidden && _motion != 0)
             {
                 HideYouLabel();
@@ -32,7 +31,7 @@ public partial class Paddle : Area2D
 
             // Using unreliable to make sure position is updated as fast as possible,
             // even if one of the calls is dropped
-            RpcUnreliable(nameof(SetPosAndMotion), Position, _motion);
+            Rpc(nameof(SetPosAndMotion), Position, _motion);
         }
         else
         {
@@ -41,13 +40,13 @@ public partial class Paddle : Area2D
                 HideYouLabel();
             }
         }
-        Translate(new Vector2(0, _motion * delta));
+        Translate(new Vector2(0, _motion * (float)delta));
 
         // Set screen limits. Can't modify structs directly, so we create a new one.
-        Position = new Vector2(Position.x, Mathf.Clamp(Position.y, 16, _screenSizeY - 16));
+        Position = new Vector2(Position.X, Mathf.Clamp(Position.Y, 16, _screenSizeY - 16));
     }
 
-    [Puppet]
+    [Rpc(TransferMode = MultiplayerPeer.TransferModeEnum.Unreliable)]
     private void SetPosAndMotion(Vector2 pos, float motion)
     {
         Position = pos;
@@ -62,7 +61,7 @@ public partial class Paddle : Area2D
 
     private void OnPaddleAreaEnter(Area2D area)
     {
-        if (IsNetworkMaster())
+        if (IsMultiplayerAuthority())
         {
             area.Rpc("Bounce", _left, GD.Randf());
         }

mono/multiplayer_pong/logic/Pong.cs

@@ -4,9 +4,9 @@ using System;
 public partial class Pong : Node2D
 {
     [Signal]
-    private delegate void GameFinished(string withError);
+    public delegate void GameFinishedEventHandler(string withError);
 
-    private const int ScoreToWin = 10;
+    private const int ScoreToWin = 3;
 
     private int _scoreLeft = 0;
     private int _scoreRight = 0;
@@ -28,19 +28,19 @@ public partial class Pong : Node2D
         // By default, all nodes in server inherit from master,
         // while all nodes in clients inherit from puppet.
         // SetNetworkMaster is tree-recursive by default.
-        if (GetTree().IsNetworkServer())
+        if (GetTree().GetMultiplayer().IsServer())
         {
-            _playerTwo.SetNetworkMaster(GetTree().GetNetworkConnectedPeers()[0]);
+            _playerTwo.SetMultiplayerAuthority(GetTree().GetMultiplayer().GetPeers()[0]);
         }
         else
         {
-            _playerTwo.SetNetworkMaster(GetTree().GetNetworkUniqueId());
+            _playerTwo.SetMultiplayerAuthority(GetTree().GetMultiplayer().GetUniqueId());
         }
 
-        GD.Print("Unique id: ", GetTree().GetNetworkUniqueId());
+        GD.Print("Unique id: ", GetTree().GetMultiplayer().GetUniqueId());
     }
 
-    [Sync]
+    [Rpc(CallLocal = true)]
     private void UpdateScore(bool addToLeft)
     {
         if (addToLeft)

mono/multiplayer_pong/project.godot

@@ -16,7 +16,7 @@ One of the players should press 'host', while the
 other should select the address and press 'join'."
 config/tags=PackedStringArray("2d", "demo", "network", "official")
 run/main_scene="res://lobby.tscn"
-config/features=PackedStringArray("4.4")
+config/features=PackedStringArray("4.4", "C#")
 config/icon="res://icon.webp"
 
 [display]
@@ -26,6 +26,10 @@ window/size/viewport_height=400
 window/stretch/mode="canvas_items"
 window/stretch/aspect="expand"
 
+[dotnet]
+
+project/assembly_name="Pong Multiplayer with C#"
+
 [input]
 
 move_down={