First working multiplayer implementation

project.godot

@@ -15,6 +15,10 @@ run/main_scene="res://scenes/utils/Menu.tscn"
 config/features=PackedStringArray("4.3", "Forward Plus")
 config/icon="res://icon.svg"
 
+[autoload]
+
+GameServerManager="*res://scripts/game_server_manager.gd"
+
 [display]
 
 window/size/viewport_width=1920

scenes/maps/el_test.gd

@@ -6,15 +6,32 @@ var player_side: String
 @onready var intro_view_port = $Intro/CameraMount/IntroCamera/SubViewportContainer/SubViewport
 @onready var spawns = $Spawns
 @onready var root = $'.' 
+@onready var players = $Players
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	var char : Node3D = null
 	var red_spawn: Node3D = $Spawns/Blue/SpawnArea
 	var position := red_spawn.global_position
-	char = ResourceLoader.load("res://scenes/utils/character.tscn").instantiate()
+	if multiplayer.is_server():
+		for i in GameServerManager.players:
+			char = ResourceLoader.load("res://scenes/utils/character.tscn").instantiate()
+			char.name = str(GameServerManager.players[i].name)
+			char.global_position = position
+			var my_random_number = RandomNumberGenerator.new().randf_range(-2.0, 2.0)
+			char.global_position = position
+			char.global_position.x += my_random_number
+			$MultiplayerSpawner.spawn(char)
+			players.add_child(char)
+
+func spawn_player(id: int):
+	var red_spawn: Node3D = $Spawns/Blue/SpawnArea
+	var position := red_spawn.global_position
+	var char = ResourceLoader.load("res://scenes/utils/character.tscn").instantiate()
+	char.name = str(GameServerManager.players[id].name)
 	char.global_position = position
-	root.add_child(char)
+	var my_random_number = RandomNumberGenerator.new().randf_range(-2.0, 2.0)
-	pass
+	char.global_position = position
+	char.global_position.x += my_random_number
 			
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.

scenes/maps/el_test.tscn

@@ -24,3 +24,10 @@ size = Vector3(0.100647, 1, 6.02112)
 [node name="SpawnArea" type="CSGBox3D" parent="Spawns/Blue"]
 transform = Transform3D(5.70162, 0, 0, 0, 1, 0, 0, 0, 7.97817, 21.2099, 1.78438, 1.23551)
 size = Vector3(0.484497, 1, 5.99213)
+
+[node name="MultiplayerSpawner" type="MultiplayerSpawner" parent="."]
+_spawnable_scenes = PackedStringArray("res://scenes/utils/character.tscn")
+spawn_path = NodePath("../Players")
+spawn_limit = 4
+
+[node name="Players" type="Node3D" parent="."]

scenes/utils/character.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=6 format=3 uid="uid://ccm77j5rkh21w"]
+[gd_scene load_steps=7 format=3 uid="uid://ccm77j5rkh21w"]
 
 [ext_resource type="Script" path="res://scripts/character_controller.gd" id="1_sue4n"]
 [ext_resource type="PackedScene" uid="uid://bmqutwuj28san" path="res://scenes/utils/view_model_camera.tscn" id="4_al83x"]
@@ -9,6 +9,14 @@
 radius = 0.368364
 height = 1.8
 
+[sub_resource type="SceneReplicationConfig" id="SceneReplicationConfig_csl3n"]
+properties/0/path = NodePath(".:position")
+properties/0/spawn = true
+properties/0/replication_mode = 1
+properties/1/path = NodePath("CharacterBody3D:position")
+properties/1/spawn = true
+properties/1/replication_mode = 1
+
 [node name="Character" type="Node3D"]
 
 [node name="CharacterBody3D" type="CharacterBody3D" parent="."]
@@ -23,10 +31,12 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.71312, 0)
 radius = 0.001
 
 [node name="ViewModelCamera" parent="CharacterBody3D/UpperTorso" instance=ExtResource("4_al83x")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.00122696, 0.093623, -0.179357)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.00122696, 0.093623, -0.463804)
 script = ExtResource("4_uwcjh")
 
 [node name="Pistol" parent="CharacterBody3D/UpperTorso/ViewModelCamera" instance=ExtResource("5_6k7rq")]
 transform = Transform3D(-1, 0, -8.74228e-08, 0, 1, 0, 8.74228e-08, 0, -1, -0.0287516, -0.136104, -0.276055)
-visible = false
 script = null
+
+[node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="."]
+replication_config = SubResource("SceneReplicationConfig_csl3n")

scenes/utils/menu.gd

@@ -1,22 +1,8 @@
 extends Control
 
+# Autoload named Lobby
 
-# Called when the node enters the scene tree for the first time.
+# These signals can be connected to by a UI lobby scene or the game scene.
-func _ready() -> void:
-	multiplayer.peer_connected.connect(_on_player_connected)
-	multiplayer.peer_disconnected.connect(_on_player_disconnected)
-	multiplayer.connected_to_server.connect(_on_connected_ok)
-	multiplayer.connection_failed.connect(_on_connected_fail)
-	multiplayer.server_disconnected.connect(_on_server_disconnected)
-	pass # Replace with function body.
-
-
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
-
-var peer = ENetMultiplayerPeer.new()
-
 signal player_connected(peer_id, player_info)
 signal player_disconnected(peer_id)
 signal server_disconnected
@@ -25,20 +11,37 @@ const PORT = 7000
 const DEFAULT_SERVER_IP = "127.0.0.1" # IPv4 localhost
 const MAX_CONNECTIONS = 20
 
+var players = {}
+var my_random_number = RandomNumberGenerator.new().randf_range(-2.0, 2.0)
+var player_info = {"name": str(my_random_number)}
 var players_loaded = 0
 
-var player_info = {"name": "Name"}
+# Called when the node enters the scene tree for the first time.
-var players = {}
+func _ready() -> void:
+	multiplayer.peer_connected.connect(_on_player_connected)
+	multiplayer.peer_disconnected.connect(_on_player_disconnected)
+	multiplayer.connected_to_server.connect(_on_connected_ok)
+	multiplayer.connection_failed.connect(_on_connected_fail)
+	multiplayer.server_disconnected.connect(_on_server_disconnected)
 
-func _on_host_pressed() -> void:
+func join_game(address = ""):
+	if address.is_empty():
+		address = DEFAULT_SERVER_IP
+	var peer = ENetMultiplayerPeer.new()
+	var error = peer.create_client(address, PORT)
+	if error:
+		return error
+	multiplayer.multiplayer_peer = peer
+	
+	
+func create_game():
 	var peer = ENetMultiplayerPeer.new()
 	var error = peer.create_server(PORT, MAX_CONNECTIONS)
 	if error:
-		print(error)
+		return error
 	multiplayer.multiplayer_peer = peer
-
 	players[1] = player_info
-	player_connected.emit(1, player_info)
+	player_connected.emit(peer.get_unique_id(), player_info)
 
 
 func remove_multiplayer_peer():
@@ -47,7 +50,7 @@ func remove_multiplayer_peer():
 # When the server decides to start the game from a UI scene,
 # do Lobby.load_game.rpc(filepath)
 @rpc("call_local", "reliable")
-func load_game(game_scene_path):
+func load_game():
 	get_tree().change_scene_to_file("res://scenes/maps/el_test.tscn")
 
 # Every peer will call this when they have loaded the game scene.
@@ -55,36 +58,35 @@ func load_game(game_scene_path):
 func player_loaded():
 	if multiplayer.is_server():
 		players_loaded += 1
+		players_loaded = players.size()
 		if players_loaded == players.size():
-			
+			#$/root/Game.start_game()
 			players_loaded = 0
 			
-func _on_join_pressed() -> void:
+# When a peer connects, send them my player info.
-	var address = '127.0.0.1'
+# This allows transfer of all desired data for each player, not only the unique ID.
-	var peer = ENetMultiplayerPeer.new()
+func _on_player_connected(id):
-	var error = peer.create_client(address, PORT)
+	player_info = {"name": multiplayer.get_unique_id()}
-	if error:
+	_register_player.rpc_id(1, multiplayer.get_unique_id(), player_info)
-		print(error)
-	multiplayer.multiplayer_peer = peer
-	
-
-
-func _on_player_connected(id: Variant, player_info: Variant) -> void:
-	print(player_info)
-	_register_player.rpc_id(id, player_info)
 	
 @rpc("any_peer", "reliable")
-func _register_player(new_player_info):
+func _register_player(id: int, new_player_info):
-	var new_player_id = multiplayer.get_remote_sender_id()
+	var new_player_id: int = 1
-	players[new_player_id] = new_player_info
+	if not multiplayer.is_server():
-	player_connected.emit(new_player_id, new_player_info)
+		new_player_id = 1
+	else:
+		new_player_id = multiplayer.get_remote_sender_id()
+	players[id] = new_player_info
+	GameServerManager.players[id] = new_player_info
+	#player_info = {"name": str(multiplayer.get)}
+	player_connected.emit(id, new_player_info)
 
 	
-func _on_player_disconnected(id: Variant) -> void:
+func _on_player_disconnected(id):
-	pass
 	players.erase(id)
 	player_disconnected.emit(id)
 
+
 func _on_connected_ok():
 	var peer_id = multiplayer.get_unique_id()
 	players[peer_id] = player_info
@@ -94,16 +96,22 @@ func _on_connected_ok():
 func _on_connected_fail():
 	multiplayer.multiplayer_peer = null
 
-func _on_server_disconnected() -> void:
+
+func _on_server_disconnected():
 	multiplayer.multiplayer_peer = null
 	players.clear()
 	server_disconnected.emit()
+# Called every frame. 'delta' is the elapsed time since the previous frame.
 
+func _on_host_pressed() -> void:
+	player_info = {"name":  str(1)}
+	_register_player(1, player_info)
+	create_game()
 
-
+func _on_join_pressed() -> void:
-@rpc("call_local", "reliable", "any_peer")
+	join_game()
-func start_game():
-	get_tree().change_scene_to_file("res://scenes/maps/el_test.tscn")
 
 func _on_start_pressed() -> void:
-	start_game.rpc()
+	load_game.rpc()
+func _process(delta: float) -> void:
+	pass

scenes/weapon/bullet.tscn

@@ -37,6 +37,8 @@ surface_material_override/0 = SubResource("StandardMaterial3D_p8o05")
 [node name="RayCast3D" type="RayCast3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.100459)
 target_position = Vector3(0, 0, -0.5)
+hit_back_faces = false
+collide_with_areas = true
 
 [node name="GPUParticles3D" type="GPUParticles3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0.18476)

scripts/character_controller.gd

@@ -16,7 +16,6 @@ class_name Player extends CharacterBody3D
 @onready var body: Node3D = $RealBody
 var jumping: bool = false
 var mouse_captured: bool = false
-
 var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
 
 var move_dir: Vector2 # Input direction for movement
@@ -32,7 +31,11 @@ var is_crouch: bool = false
 @onready var character: Node3D = $"."
 
 func _ready() -> void:
+	$"../MultiplayerSynchronizer".set_multiplayer_authority(str($"..".name).to_int())
+	enable_camera()
 	capture_mouse()
+	#print("I am " + str(multiplayer.get_unique_id()) + "I'm controling " + str($"../MultiplayerSynchronizer".get_multiplayer_authority()))
+
 func _unhandled_input(event: InputEvent) -> void:
 	if event is InputEventMouseMotion:
 		look_dir = event.relative * 0.001
@@ -44,12 +47,15 @@ func _unhandled_input(event: InputEvent) -> void:
 	if Input.is_action_just_pressed("crouch"): crouch()
 	if Input.is_action_just_released("crouch"): uncrouch()
 	
+func enable_camera():
+	if str($"..".name).to_int() == multiplayer.get_unique_id():
+		$UpperTorso/ViewModelCamera.make_current()
 
 func _physics_process(delta: float) -> void:
-	if mouse_captured: _handle_joypad_camera_rotation(delta)
+	if str($"..".name).to_int() == multiplayer.get_unique_id():
-	velocity = _walk(delta) + _gravity(delta) + _jump(delta)
+		if mouse_captured: _handle_joypad_camera_rotation(delta)
-	
+		velocity = _walk(delta) + _gravity(delta) + _jump(delta)
-	move_and_slide()
+		move_and_slide()
 
 func capture_mouse() -> void:
 	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

scripts/game_server_manager.gd

@@ -0,0 +1,11 @@
+extends Node
+
+var players = {}
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass