add multiplayer lobby system

level/PlayerSpawner.gd

@@ -0,0 +1,15 @@
+extends MultiplayerSpawner
+
+func _ready():
+	set_multiplayer_authority(1)
+	spawn_function = spawn_player
+
+func spawn_player(owner_id: int):
+	var player := preload("res://player/player.tscn").instantiate()
+	player.set_multiplayer_authority(owner_id)
+	if multiplayer.get_unique_id() == owner_id:
+		var camera := preload("res://camera/camera.tscn").instantiate()
+		player.add_child(camera)
+	player.position.y = 5.0
+	return player
+

level/level.gd

@@ -0,0 +1,5 @@
+extends Node3D
+
+# Called from the server
+func server_add_player(id: int):
+	%PlayerSpawner.spawn(id)

level/level.tscn

@@ -1,10 +1,10 @@
 [gd_scene load_steps=8 format=3 uid="uid://b00brfkibo5cj"]
 
 [ext_resource type="PackedScene" uid="uid://bq654gwim6col" path="res://level/level.glb" id="1_s37in"]
-[ext_resource type="PackedScene" uid="uid://do25xvpy80iio" path="res://player/player.tscn" id="2_7ct70"]
 [ext_resource type="Environment" uid="uid://covjrwmk4rplw" path="res://level/world_environment.tres" id="2_ptkl6"]
-[ext_resource type="PackedScene" uid="uid://brgqf2ebuyhuy" path="res://camera/camera.tscn" id="3_yev7j"]
+[ext_resource type="Script" path="res://level/level.gd" id="2_s1bx6"]
 [ext_resource type="Script" path="res://addons/smoother/smoother.gd" id="5_2tyle"]
+[ext_resource type="Script" path="res://level/PlayerSpawner.gd" id="6_7ww0m"]
 
 [sub_resource type="WorldBoundaryShape3D" id="WorldBoundaryShape3D_ujmev"]
 margin = 2.067
@@ -13,6 +13,7 @@ margin = 2.067
 size = Vector3(2, 0.1, 2)
 
 [node name="level" instance=ExtResource("1_s37in")]
+script = ExtResource("2_s1bx6")
 
 [node name="WorldEnvironment" type="WorldEnvironment" parent="." index="0"]
 environment = ExtResource("2_ptkl6")
@@ -30,17 +31,14 @@ shape = SubResource("WorldBoundaryShape3D_ujmev")
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.05, 0)
 shape = SubResource("BoxShape3D_qp06x")
 
-[node name="Player" parent="." index="3" instance=ExtResource("2_7ct70")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 7.36667, 2.66437, 0)
-floor_max_angle = 1.309
-JUMP_VELOCITY = 5.0
+[node name="Players" type="Node3D" parent="." index="3"]
+unique_name_in_owner = true
 
-[node name="Camera" parent="Player" index="2" instance=ExtResource("3_yev7j")]
-
-[node name="Players" type="Node3D" parent="." index="4"]
+[node name="PlayerSpawner" type="MultiplayerSpawner" parent="." index="4"]
+unique_name_in_owner = true
+_spawnable_scenes = PackedStringArray("res://player/player.tscn")
+spawn_path = NodePath("../Players")
+script = ExtResource("6_7ww0m")
 
 [node name="Smoother" type="Node" parent="." index="5"]
 script = ExtResource("5_2tyle")
-
-[node name="MultiplayerSpawner" type="MultiplayerSpawner" parent="." index="6"]
-spawn_path = NodePath("../Players")

menu/main_menu.gd

@@ -0,0 +1,16 @@
+extends Control
+
+
+func _on_create_server_pressed():
+	get_tree().change_scene_to_file("res://server/server.tscn")
+
+
+func _on_connect_to_server_pressed():
+	var address: String = %ConnectIP.text
+	var port := int(%ConnectPort.text)
+	var parent := get_parent()
+	queue_free()
+	var scene := preload("res://server/client_lobbies.tscn").instantiate()
+	scene.address = address
+	scene.port = port
+	parent.add_child(scene)

menu/main_menu.tscn

@@ -0,0 +1,51 @@
+[gd_scene load_steps=2 format=3 uid="uid://b4tgnq0dwf13"]
+
+[ext_resource type="Script" path="res://menu/main_menu.gd" id="1_q1k1j"]
+
+[node name="MainMenu" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_q1k1j")
+
+[node name="VBoxContainer" type="VBoxContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="CreateServer" type="Button" parent="VBoxContainer"]
+layout_mode = 2
+text = "Start Server"
+
+[node name="Label" type="Label" parent="VBoxContainer"]
+layout_mode = 2
+text = "Server IP"
+
+[node name="ConnectIP" type="TextEdit" parent="VBoxContainer"]
+unique_name_in_owner = true
+custom_minimum_size = Vector2(0, 61.195)
+layout_mode = 2
+text = "127.0.0.1"
+
+[node name="Label2" type="Label" parent="VBoxContainer"]
+layout_mode = 2
+text = "Server Port"
+
+[node name="ConnectPort" type="TextEdit" parent="VBoxContainer"]
+unique_name_in_owner = true
+custom_minimum_size = Vector2(0, 61.195)
+layout_mode = 2
+text = "3000"
+
+[node name="ConnectToServer" type="Button" parent="VBoxContainer"]
+layout_mode = 2
+text = "Connect To Server"
+
+[connection signal="pressed" from="VBoxContainer/CreateServer" to="." method="_on_create_server_pressed"]
+[connection signal="pressed" from="VBoxContainer/ConnectToServer" to="." method="_on_connect_to_server_pressed"]

player/player.tscn

@@ -7,15 +7,14 @@
 properties/0/path = NodePath(".:position")
 properties/0/spawn = true
 properties/0/replication_mode = 1
-properties/1/path = NodePath("player:velocity")
-properties/1/spawn = true
-properties/1/replication_mode = 1
 
 [sub_resource type="SphereShape3D" id="SphereShape3D_t1htn"]
 radius = 0.986757
 
 [node name="player" instance=ExtResource("1_0u2un")]
+floor_max_angle = 1.32121
 script = ExtResource("1_gh340")
+JUMP_VELOCITY = 8.0
 
 [node name="MultiplayerSynchronizer" type="MultiplayerSynchronizer" parent="." index="0"]
 replication_config = SubResource("SceneReplicationConfig_u4bmc")

project.godot

@@ -29,9 +29,14 @@ DSP/dsp_buffer_count=4
 [application]
 
 config/name="Grounders"
+run/main_scene="res://menu/main_menu.tscn"
 config/features=PackedStringArray("4.2", "Forward Plus")
 config/icon="res://icon.svg"
 
+[autoload]
+
+MultiplayerEvents="*res://server/MultiplayerEvents.gd"
+
 [input]
 
 move_left={

server/LobbyListEntry.gd

@@ -0,0 +1,7 @@
+extends Button
+
+@export var address: String
+@export var port: int
+
+func _ready():
+	text = "Connect to " + address + ":" + str(port)

server/MultiplayerEvents.gd

@@ -0,0 +1,2 @@
+extends Node
+

server/client.gd

@@ -0,0 +1,15 @@
+extends Node
+
+@export var address: String
+@export var port: int
+
+func _ready():
+	var m = SceneMultiplayer.new()
+	get_tree().set_multiplayer(m, get_path())
+	var peer := ENetMultiplayerPeer.new()
+	peer.create_client(address, port)
+	m.multiplayer_peer = peer	
+	m.connected_to_server.connect(connected_to_server)
+	
+func connected_to_server():
+	print("Client connected to server")

server/client.tscn

@@ -0,0 +1,9 @@
+[gd_scene load_steps=3 format=3 uid="uid://cb5t0uw0nr5bg"]
+
+[ext_resource type="Script" path="res://server/client.gd" id="1_frcvp"]
+[ext_resource type="PackedScene" uid="uid://b00brfkibo5cj" path="res://level/level.tscn" id="2_eigcb"]
+
+[node name="Client" type="Node"]
+script = ExtResource("1_frcvp")
+
+[node name="level" parent="." instance=ExtResource("2_eigcb")]

server/client_lobbies.gd

@@ -0,0 +1,25 @@
+extends Control
+
+var address: String
+var port: int
+
+func _ready():
+	var m = SceneMultiplayer.new()
+	get_tree().set_multiplayer(m, %LobbyList.get_path())
+	var peer := ENetMultiplayerPeer.new()
+	var error := peer.create_client(address, port)
+	if error:
+		push_error(error)
+	m.multiplayer_peer = peer
+	m.connected_to_server.connect(connected_to_server)
+	%LobbyList.set_multiplayer_authority(1)
+
+func connected_to_server():
+	print("Connected to master server @ " + address + ":" + str(port))
+
+func _on_lobby_list_join_lobby(join_addr, join_port):
+	queue_free()
+	var client := preload("res://server/client.tscn").instantiate()
+	client.address = join_addr
+	client.port = join_port
+	get_parent().add_child(client)

server/client_lobbies.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=3 format=3 uid="uid://d3i1pstq13h2p"]
+
+[ext_resource type="Script" path="res://server/client_lobbies.gd" id="1_2hyqo"]
+[ext_resource type="PackedScene" uid="uid://bdfsbuxqrkq68" path="res://server/lobby_list.tscn" id="2_rktrq"]
+
+[node name="Server" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_2hyqo")
+
+[node name="Label" type="Label" parent="."]
+layout_mode = 0
+offset_right = 40.0
+offset_bottom = 23.0
+text = "Lobby List:"
+
+[node name="LobbyList" parent="." instance=ExtResource("2_rktrq")]
+unique_name_in_owner = true
+layout_mode = 1
+
+[connection signal="join_lobby" from="LobbyList" to="." method="_on_lobby_list_join_lobby"]
+
+[editable path="LobbyList"]

server/lobby.gd

@@ -0,0 +1,16 @@
+extends Node
+
+var port: int
+var MAX_CLIENTS := 32
+
+func _ready():
+	var m = SceneMultiplayer.new()
+	get_tree().set_multiplayer(m, get_path())
+	var peer := ENetMultiplayerPeer.new()
+	peer.create_server(port, MAX_CLIENTS)
+	m.multiplayer_peer = peer
+	m.peer_connected.connect(peer_connected)
+
+func peer_connected(id: int):
+	print("Client " + str(id) + "connected to lobby " + str(get_path()))
+	$level.server_add_player(id)

server/lobby.tscn

@@ -0,0 +1,9 @@
+[gd_scene load_steps=3 format=3 uid="uid://tilcdm56kb10"]
+
+[ext_resource type="Script" path="res://server/lobby.gd" id="1_cpwsy"]
+[ext_resource type="PackedScene" uid="uid://b00brfkibo5cj" path="res://level/level.tscn" id="2_mulf5"]
+
+[node name="Lobby" type="Node"]
+script = ExtResource("1_cpwsy")
+
+[node name="level" parent="." instance=ExtResource("2_mulf5")]

server/lobby_list.gd

@@ -0,0 +1,17 @@
+extends Control
+
+signal join_lobby(addr: String, port: int)
+
+@rpc("reliable", "authority", "call_local")
+func add(addr: String, port: int):
+	var lobby_button := preload("res://server/lobby_list_entry.tscn").instantiate()
+	lobby_button.address = addr
+	lobby_button.port = port
+	$Lobbies.add_child(lobby_button, true)
+	lobby_button.pressed.connect(emit_join_lobby.bind(addr, port))
+
+func emit_join_lobby(addr: String, port: int):
+	join_lobby.emit(addr, port)
+
+func lobbies():
+	return $Lobbies.get_children()

server/lobby_list.tscn

@@ -0,0 +1,21 @@
+[gd_scene load_steps=2 format=3 uid="uid://bdfsbuxqrkq68"]
+
+[ext_resource type="Script" path="res://server/lobby_list.gd" id="1_tktrj"]
+
+[node name="LobbyList" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_top = 67.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_tktrj")
+
+[node name="Lobbies" type="VBoxContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2

server/lobby_list_entry.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://mhnsc0w6xt85"]
+
+[ext_resource type="Script" path="res://server/LobbyListEntry.gd" id="1_su4dr"]
+
+[node name="LobbyListEntry" type="Button"]
+script = ExtResource("1_su4dr")

server/overview.txt

@@ -0,0 +1,4 @@
+Two types of servers / clients
+One for lobby management and one for actual game
+server.gd and client_lobbies.gd handle the former
+and lobby.gd and client.gd handle the latter

server/server.gd

@@ -0,0 +1,31 @@
+extends Node
+
+@export var external_address := "127.0.0.1"
+var master_server_port := 3000
+var next_port_num := master_server_port + 1
+const MAX_CLIENTS = 4095
+
+func _ready():
+	var m = SceneMultiplayer.new()
+	get_tree().set_multiplayer(m, %LobbyList.get_path())
+	var peer := ENetMultiplayerPeer.new()
+	var error := peer.create_server(master_server_port, MAX_CLIENTS)
+	if error:
+		push_error(error)
+	m.multiplayer_peer = peer
+	m.peer_connected.connect(peer_connected)
+	
+func peer_connected(id: int):
+	print("Client " + str(id) + " connected to master server")
+	for lobby in %LobbyList.lobbies():
+		%LobbyList.add.rpc_id(id, lobby.address, lobby.port)
+
+func create_lobby():
+	var lobby := preload("res://server/lobby.tscn").instantiate()
+	lobby.port = next_port_num
+	next_port_num += 1
+	%Lobbies.add_child(lobby)
+	%LobbyList.add.rpc(external_address, lobby.port)
+	
+func _on_create_lobby_pressed():
+	create_lobby()

server/server.tscn

@@ -0,0 +1,29 @@
+[gd_scene load_steps=3 format=3 uid="uid://cb6qjcj72sfe2"]
+
+[ext_resource type="Script" path="res://server/server.gd" id="1_0oac5"]
+[ext_resource type="PackedScene" uid="uid://bdfsbuxqrkq68" path="res://server/lobby_list.tscn" id="2_mxbok"]
+
+[node name="Server" type="Node"]
+script = ExtResource("1_0oac5")
+
+[node name="DebugControls" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="CreateLobby" type="Button" parent="DebugControls"]
+layout_mode = 0
+offset_right = 8.0
+offset_bottom = 8.0
+text = "Create Lobby"
+
+[node name="LobbyList" parent="." instance=ExtResource("2_mxbok")]
+unique_name_in_owner = true
+
+[node name="Lobbies" type="Node" parent="."]
+unique_name_in_owner = true
+
+[connection signal="pressed" from="DebugControls/CreateLobby" to="." method="_on_create_lobby_pressed"]