✨ Multiplayer Basis

.idea/.idea.CodingLand/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Scenes/Player.tscn

@@ -6,8 +6,9 @@
 [sub_resource type="CircleShape2D" id="CircleShape2D_68yf8"]
 radius = 26.0768
 
-[node name="Player" type="CharacterBody2D"]
+[node name="Player" type="CharacterBody2D" node_paths=PackedStringArray("PlayerDashCountdown")]
 script = ExtResource("1_0btyt")
+PlayerDashCountdown = NodePath("DashCountdown")
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
 position = Vector2(2.08165e-12, 2.08165e-12)
@@ -16,3 +17,6 @@ texture = ExtResource("1_cqpqa")
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 shape = SubResource("CircleShape2D_68yf8")
+
+[node name="DashCountdown" type="Timer" parent="."]
+one_shot = true

Scenes/Root.tscn

@@ -1,14 +1,26 @@
-[gd_scene load_steps=2 format=3 uid="uid://bjhmjrldq4lkt"]
+[gd_scene load_steps=4 format=3 uid="uid://bjhmjrldq4lkt"]
 
+[ext_resource type="Script" path="res://Scripts/Multiplayer.cs" id="1_fym13"]
 [ext_resource type="PackedScene" uid="uid://b3gx0bl43lku3" path="res://Scenes/Player.tscn" id="1_vby0g"]
+[ext_resource type="PackedScene" uid="uid://bvll23f5ibd4v" path="res://Scenes/UI/MultiplayerUI.tscn" id="2_7o53i"]
 
 [node name="Node" type="Node"]
 
-[node name="Camera2D" type="Camera2D" parent="."]
+[node name="MultiplayerNode" type="Node" parent="." node_paths=PackedStringArray("Playground")]
+script = ExtResource("1_fym13")
+Playground = NodePath("../Playground")
+
+[node name="MultiplayerUi" parent="." node_paths=PackedStringArray("MultiplayerController") instance=ExtResource("2_7o53i")]
+MultiplayerController = NodePath("../MultiplayerNode")
+
+[node name="Playground" type="Node2D" parent="."]
+
+[node name="Camera2D" type="Camera2D" parent="Playground"]
+enabled = false
 process_callback = 0
 position_smoothing_enabled = true
 rotation_smoothing_enabled = true
 
-[node name="Player" parent="." node_paths=PackedStringArray("PlayerCamera") instance=ExtResource("1_vby0g")]
+[node name="Player" parent="Playground" node_paths=PackedStringArray("PlayerCamera") instance=ExtResource("1_vby0g")]
 position = Vector2(0, 2)
 PlayerCamera = NodePath("../Camera2D")

Scenes/UI/MultiplayerUI.tscn

@@ -0,0 +1,49 @@
+[gd_scene load_steps=2 format=3 uid="uid://bvll23f5ibd4v"]
+
+[ext_resource type="Script" path="res://Scripts/UI/MultiplayerUi.cs" id="1_fm6j5"]
+
+[node name="MultiplayerUi" type="Control" node_paths=PackedStringArray("ServerPortInput", "ServerAddrInput", "StartAsServerButton", "StartAsClientButton")]
+process_mode = 3
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_fm6j5")
+ServerPortInput = NodePath("CenterContainer/VBoxContainer/PortEdit")
+ServerAddrInput = NodePath("CenterContainer/VBoxContainer/AddrEdit")
+StartAsServerButton = NodePath("CenterContainer/VBoxContainer/HBoxContainer/HostButton")
+StartAsClientButton = NodePath("CenterContainer/VBoxContainer/HBoxContainer/ConnectButton")
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+layout_mode = 0
+offset_right = 1152.0
+offset_bottom = 648.0
+
+[node name="VBoxContainer" type="VBoxContainer" parent="CenterContainer"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="CenterContainer/VBoxContainer"]
+layout_mode = 2
+text = "Mutiplayer"
+horizontal_alignment = 1
+
+[node name="PortEdit" type="LineEdit" parent="CenterContainer/VBoxContainer"]
+layout_mode = 2
+placeholder_text = "Server port"
+
+[node name="AddrEdit" type="LineEdit" parent="CenterContainer/VBoxContainer"]
+layout_mode = 2
+placeholder_text = "Server address"
+
+[node name="HBoxContainer" type="HBoxContainer" parent="CenterContainer/VBoxContainer"]
+layout_mode = 2
+
+[node name="HostButton" type="Button" parent="CenterContainer/VBoxContainer/HBoxContainer"]
+layout_mode = 2
+text = "Host a Game"
+
+[node name="ConnectButton" type="Button" parent="CenterContainer/VBoxContainer/HBoxContainer"]
+layout_mode = 2
+text = "Connect a Game"

Scripts/Multiplayer.cs

@@ -0,0 +1,71 @@
+using System;
+using Godot;
+
+namespace CodingLand.Scripts;
+
+public partial class Multiplayer : Node
+{
+	[Export] public Node2D Playground;
+	
+	private void GameFreeze()
+	{
+		Playground.Hide();
+		GetTree().Paused = true;
+	}
+
+	private void GameUnfreeze()
+	{
+		Playground.Show();
+		Playground.GetNode<Camera2D>("Camera2D").Enabled = true;
+		GetTree().Paused = false;
+	}
+	
+	public override void _Ready()
+	{
+		GameFreeze();
+		
+		if (DisplayServer.GetName() == "headless")
+		{
+			GD.Print("Starting server in headless mode...");
+			StartAsServer(4343);
+		}
+	}
+
+	public bool StartAsServer(int port)
+	{
+		var peer = new ENetMultiplayerPeer();
+		peer.CreateServer(port);
+		if (peer.GetConnectionStatus() == MultiplayerPeer.ConnectionStatus.Disconnected)
+		{
+			GD.PrintErr("Failed to start multiplayer server...");
+			OS.Alert("Failed to start multiplayer server...");
+			return false;
+		}
+
+		Multiplayer.MultiplayerPeer = peer;
+		GameUnfreeze();
+
+		return true;
+	}
+
+	public bool StartAsClient(string addr, int port)
+	{
+		if (string.IsNullOrEmpty(addr)) return false;
+		
+		var peer = new ENetMultiplayerPeer();
+		peer.CreateClient(addr, port);
+		if (peer.GetConnectionStatus() == MultiplayerPeer.ConnectionStatus.Disconnected)
+		{
+			var info = $"Unable to connect multiplayer server {addr}:{port}";
+			GD.PrintErr(info);
+			OS.Alert(info);
+			return false;
+		}
+
+		Multiplayer.MultiplayerPeer = peer;
+		GameUnfreeze();
+		
+		return true;
+	}
+
+}

Scripts/Player.cs

@@ -1,3 +1,4 @@
+using System;
 using Godot;
 
 namespace CodingLand.Scripts;
@@ -13,6 +14,9 @@ public partial class Player : CharacterBody2D
 	
 	[Export] public Camera2D PlayerCamera;
 	
+	[Export] public Timer PlayerDashCountdown;
+	[Export] public float PlayerDashAcceleration = 2f;
+
 	public override void _PhysicsProcess(double delta)
 	{
 		var input = Vector2.Zero;
@@ -40,6 +44,12 @@ public partial class Player : CharacterBody2D
 			Velocity = Velocity.MoveToward(Vector2.Zero, Deceleration * (float)delta);
 		}
 
+		if (Input.IsActionJustPressed("move_dash") && PlayerDashCountdown.IsStopped())
+		{
+			Velocity *= PlayerDashAcceleration;
+			PlayerDashCountdown.Start();
+		}
+		
 		Position += Velocity * (float)delta;
 		MoveAndSlide();
 		

Scripts/UI/MultiplayerUi.cs

@@ -0,0 +1,74 @@
+using Godot;
+
+namespace CodingLand.Scripts.UI;
+
+public partial class MultiplayerUi : Control
+{
+	[Export] public int DefaultServerPort = 4343;
+	[Export] public string DefaultServerAddr = "127.0.0.1";
+
+	[Export] public Multiplayer MultiplayerController;
+
+	[Export] public LineEdit ServerPortInput;
+	[Export] public LineEdit ServerAddrInput;
+	[Export] public Button StartAsServerButton;
+	[Export] public Button StartAsClientButton;
+
+	private void ApplySize()
+	{
+		var screenSize = GetViewportRect().Size;
+
+		Position = new Vector2(0, 0);
+		Size = screenSize;
+		GetNode<CenterContainer>("CenterContainer").Size = screenSize;
+	}
+
+	private bool DoValidation()
+	{
+		var addr = ServerAddrInput.Text;
+		var port = ServerPortInput.Text;
+
+		if (string.IsNullOrEmpty(addr)) return false;
+		if (string.IsNullOrEmpty(port) || !int.TryParse(port, out _)) return false;
+
+		return true;
+	}
+
+	public override void _Ready()
+	{
+		ApplySize();
+
+		ServerPortInput.Text = DefaultServerPort.ToString();
+		ServerAddrInput.Text = DefaultServerAddr;
+
+		StartAsServerButton.Pressed += () =>
+		{
+			if (!DoValidation())
+			{
+				OS.Alert("Invalid multiplayer configuration.");
+				return;
+			}
+
+			var port = ServerPortInput.Text;
+			var result = MultiplayerController.StartAsServer(int.Parse(port));
+			
+			if (result)
+				Hide();
+		};
+		StartAsServerButton.Pressed += () =>
+		{
+			if (!DoValidation())
+			{
+				OS.Alert("Invalid multiplayer configuration.");
+				return;
+			}
+
+			var addr = ServerAddrInput.Text;
+			var port = ServerPortInput.Text;
+			var result = MultiplayerController.StartAsClient(addr, int.Parse(port));
+
+			if (result)
+				Hide();
+		};
+	}
+}

project.godot

@@ -41,6 +41,11 @@ move_right={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":68,"key_label":0,"unicode":100,"echo":false,"script":null)
 ]
 }
+move_dash={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":32,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
 
 [rendering]