Split client and server

.gitignore

@@ -16,3 +16,4 @@
 !.gitattributes
 !project.godot
 .godot/
+server/shared/

client/network/Login.gd

@@ -1,7 +1,5 @@
 extends PacketHandler
 
-@export var playerScene: PackedScene
-
 var auth_token: String
 
 func _ready():
@@ -16,7 +14,6 @@ func handle_packet(data: PackedByteArray, _peer: PacketPeer):
 	print("[Client] Login succeeded.")
 	auth_token = data.slice(1).get_string_from_ascii()
 	print("[Client] Auth token: %s" % auth_token)
-	Global.player = spawn_player()
 
 func send_login():
 	if is_logged_in():
@@ -29,9 +26,4 @@ func send_login():
 	print("[Client] Connecting...")
 
 func is_logged_in() -> bool:
-	return auth_token != ""
-
-func spawn_player() -> Player:
-	var player = playerScene.instantiate()
-	%Players.add_child(player)
-	return player
+	return auth_token != ""

client/network/Spawn.gd

@@ -0,0 +1,14 @@
+extends PacketHandler
+
+@export var player_scene: PackedScene
+
+func _ready():
+	%Client.set_handler(Packet.SPAWN, self)
+
+func handle_packet(_data: PackedByteArray, _peer: PacketPeer):
+	Global.player = spawn_player()
+
+func spawn_player() -> Player:
+	var player = player_scene.instantiate()
+	%Players.add_child(player)
+	return player

client/player/Player.tscn

@@ -8,7 +8,7 @@
 size = Vector3(0.5, 1.6, 0.5)
 
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_2f50n"]
-radius = 0.23
+radius = 0.25
 height = 1.6
 
 [node name="Player" type="CharacterBody3D" node_paths=PackedStringArray("model") groups=["player"]]

client/project.godot

@@ -10,8 +10,8 @@ config_version=5
 
 [application]
 
-config/name="Battle of Mages"
-run/main_scene="res://world/Game.tscn"
+config/name="Client"
+run/main_scene="res://world/Client.tscn"
 config/features=PackedStringArray("4.2", "Forward Plus")
 config/icon="res://ui/icon.svg"
 
@@ -96,3 +96,4 @@ menu={
 [physics]
 
 3d/run_on_separate_thread=true
+common/physics_ticks_per_second=100

client/shared/Account.gd

@@ -0,0 +1,9 @@
+class_name Account
+
+var username: String
+var password: String
+var position: Vector3
+
+func _init(name: String, pw: String):
+	username = name
+	password = pw

client/shared/Packet.gd

@@ -4,5 +4,6 @@ enum {
 	PING = 1,
 	LOGIN = 2,
 	LOGOUT = 3,
-	MOVE = 10,
+	STATE = 10,
+	MOVE = 11,
 }

client/ui/debug/PingLabel.gd

@@ -4,4 +4,4 @@ func _ready():
 	%Ping.connect("changed", on_ping_changed)
 
 func on_ping_changed(ping):
-	text = str(snapped(ping * 1000, 0.1)) + " ms"
+	text = str(snapped(ping * 1000, 1)) + " ms"

client/world/Client.tscn

@@ -1,89 +1,67 @@
-[gd_scene load_steps=23 format=3 uid="uid://b40y7iuskv1ar"]
+[gd_scene load_steps=19 format=3 uid="uid://b40y7iuskv1ar"]
 
-[ext_resource type="Script" path="res://world/Game.gd" id="1_xmqq4"]
-[ext_resource type="Script" path="res://network/client/Client.gd" id="4_ao4cj"]
-[ext_resource type="Script" path="res://network/client/Ping.gd" id="4_vx388"]
-[ext_resource type="PackedScene" uid="uid://2lcnu3dy54lx" path="res://player/Player.tscn" id="5_6c2x8"]
-[ext_resource type="Environment" uid="uid://dixa0yso2s1u3" path="res://world/Environment.tres" id="5_bll74"]
-[ext_resource type="Script" path="res://world/Sun.gd" id="5_pf5uw"]
-[ext_resource type="CameraAttributesPractical" uid="uid://b835orxyqq6w5" path="res://world/CameraAttributes.tres" id="6_8wfwf"]
-[ext_resource type="PackedScene" uid="uid://cch67vqpsmtej" path="res://ui/debug/DebugLabel.tscn" id="6_076g5"]
-[ext_resource type="Script" path="res://network/client/Login.gd" id="6_augbg"]
-[ext_resource type="Script" path="res://ui/debug/FPSLabel.gd" id="7_3qgww"]
-[ext_resource type="Script" path="res://network/server/Ping.gd" id="7_8mtv7"]
-[ext_resource type="Script" path="res://ui/debug/PingLabel.gd" id="7_kmy1y"]
-[ext_resource type="Script" path="res://network/server/Login.gd" id="8_1y1wq"]
-[ext_resource type="Script" path="res://ui/debug/PositionLabel.gd" id="8_fge13"]
-[ext_resource type="Script" path="res://ui/debug/VelocityLabel.gd" id="9_f25hg"]
-[ext_resource type="Script" path="res://world/Camera.gd" id="9_qfhy4"]
-[ext_resource type="Material" uid="uid://ddy5gkw0k16dq" path="res://shader/OutlineMaterial.tres" id="10_dii8l"]
-[ext_resource type="PackedScene" uid="uid://hnn0n1xc2qt7" path="res://world/Tree.blend" id="15_csh38"]
-[ext_resource type="PackedScene" uid="uid://cb2t7bvvf3gwh" path="res://enemy/Slime.tscn" id="16_fuixr"]
-[ext_resource type="PackedScene" uid="uid://tgmbtt7u172g" path="res://world/Arena.blend" id="17_q45cd"]
-[ext_resource type="Script" path="res://network/server/Server.gd" id="19_bwh1t"]
+[ext_resource type="Script" path="res://world/Game.gd" id="1_pux6q"]
+[ext_resource type="Script" path="res://network/Client.gd" id="2_1ofik"]
+[ext_resource type="Script" path="res://network/Ping.gd" id="3_4h5la"]
+[ext_resource type="Script" path="res://network/Login.gd" id="4_k8n1i"]
+[ext_resource type="Script" path="res://network/Spawn.gd" id="5_7n5ie"]
+[ext_resource type="PackedScene" uid="uid://2lcnu3dy54lx" path="res://player/Player.tscn" id="5_22pku"]
+[ext_resource type="PackedScene" uid="uid://mgyg01l21t0j" path="res://world/World.tscn" id="7_fb4vs"]
+[ext_resource type="Environment" uid="uid://dixa0yso2s1u3" path="res://world/Environment.tres" id="8_5uta8"]
+[ext_resource type="PackedScene" uid="uid://cch67vqpsmtej" path="res://ui/debug/DebugLabel.tscn" id="8_jr2jn"]
+[ext_resource type="Script" path="res://ui/debug/FPSLabel.gd" id="9_0imyg"]
+[ext_resource type="CameraAttributesPractical" uid="uid://b835orxyqq6w5" path="res://world/CameraAttributes.tres" id="9_w4cdu"]
+[ext_resource type="Script" path="res://world/Sun.gd" id="10_mlmor"]
+[ext_resource type="Script" path="res://ui/debug/PingLabel.gd" id="10_pu6sd"]
+[ext_resource type="Script" path="res://ui/debug/PositionLabel.gd" id="11_k0017"]
+[ext_resource type="Script" path="res://ui/debug/VelocityLabel.gd" id="12_dgr41"]
+[ext_resource type="Script" path="res://world/Camera.gd" id="13_y4waa"]
+[ext_resource type="Material" uid="uid://ddy5gkw0k16dq" path="res://shader/OutlineMaterial.tres" id="14_hobco"]
 
 [sub_resource type="QuadMesh" id="QuadMesh_7yiqd"]
-material = ExtResource("10_dii8l")
+material = ExtResource("14_hobco")
 flip_faces = true
 size = Vector2(2, 2)
 
-[node name="Game" type="Node"]
-script = ExtResource("1_xmqq4")
+[node name="Main" type="Node"]
+script = ExtResource("1_pux6q")
 
 [node name="Client" type="Node" parent="."]
 unique_name_in_owner = true
-script = ExtResource("4_ao4cj")
-ip = null
-port = null
+script = ExtResource("2_1ofik")
 
 [node name="Ping" type="Node" parent="Client"]
 unique_name_in_owner = true
-script = ExtResource("4_vx388")
+script = ExtResource("3_4h5la")
 
 [node name="Timer" type="Timer" parent="Client/Ping"]
 autostart = true
 
 [node name="Login" type="Node" parent="Client"]
-script = ExtResource("6_augbg")
-playerScene = ExtResource("5_6c2x8")
+script = ExtResource("4_k8n1i")
 
 [node name="Timer" type="Timer" parent="Client/Login"]
 wait_time = 10.0
 autostart = true
 
-[node name="Server" type="Node" parent="."]
-unique_name_in_owner = true
-script = ExtResource("19_bwh1t")
-
-[node name="Ping" type="Node" parent="Server"]
-script = ExtResource("7_8mtv7")
-
-[node name="Login" type="Node" parent="Server"]
-script = ExtResource("8_1y1wq")
+[node name="Spawn" type="Node" parent="Client"]
+script = ExtResource("5_7n5ie")
+player_scene = ExtResource("5_22pku")
 
 [node name="Players" type="Node3D" parent="."]
 unique_name_in_owner = true
 
-[node name="Enemies" type="Node3D" parent="."]
+[node name="World" parent="." instance=ExtResource("7_fb4vs")]
 
-[node name="Slime" parent="Enemies" instance=ExtResource("16_fuixr")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.53558, 1.28057, -3.79687)
+[node name="Sun" type="DirectionalLight3D" parent="World"]
+transform = Transform3D(0.984808, 0.122788, -0.122788, 0, 0.707107, 0.707107, 0.173648, -0.696364, 0.696364, 0, 10, 0)
+shadow_enabled = true
+directional_shadow_mode = 0
+script = ExtResource("10_mlmor")
 
-[node name="Slime2" parent="Enemies" instance=ExtResource("16_fuixr")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 7.00829, 1.28057, -1.95247)
-
-[node name="Slime3" parent="Enemies" instance=ExtResource("16_fuixr")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.53558, 1.28057, -0.306177)
-
-[node name="Objects" type="Node3D" parent="."]
-
-[node name="Tree" parent="Objects" instance=ExtResource("15_csh38")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 5.11323, 0, -4.64839)
-
-[node name="Tree2" parent="Objects" instance=ExtResource("15_csh38")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 5.11323, 0, 5.35161)
-
-[node name="Arena" parent="Objects" instance=ExtResource("17_q45cd")]
+[node name="Environment" type="WorldEnvironment" parent="World"]
+environment = ExtResource("8_5uta8")
+camera_attributes = ExtResource("9_w4cdu")
 
 [node name="UI" type="Control" parent="."]
 layout_mode = 3
@@ -98,13 +76,13 @@ offset_bottom = 50.0
 [node name="VBoxContainer" type="VBoxContainer" parent="UI/CanvasLayer/TopLeftMargin"]
 layout_mode = 2
 
-[node name="FPS" parent="UI/CanvasLayer/TopLeftMargin/VBoxContainer" instance=ExtResource("6_076g5")]
+[node name="FPS" parent="UI/CanvasLayer/TopLeftMargin/VBoxContainer" instance=ExtResource("8_jr2jn")]
 layout_mode = 2
-script = ExtResource("7_3qgww")
+script = ExtResource("9_0imyg")
 
-[node name="Ping" parent="UI/CanvasLayer/TopLeftMargin/VBoxContainer" instance=ExtResource("6_076g5")]
+[node name="Ping" parent="UI/CanvasLayer/TopLeftMargin/VBoxContainer" instance=ExtResource("8_jr2jn")]
 layout_mode = 2
-script = ExtResource("7_kmy1y")
+script = ExtResource("10_pu6sd")
 
 [node name="BottomLeftMargin" type="MarginContainer" parent="UI/CanvasLayer"]
 anchors_preset = 2
@@ -117,13 +95,13 @@ grow_vertical = 0
 [node name="VBoxContainer" type="VBoxContainer" parent="UI/CanvasLayer/BottomLeftMargin"]
 layout_mode = 2
 
-[node name="Position" parent="UI/CanvasLayer/BottomLeftMargin/VBoxContainer" instance=ExtResource("6_076g5")]
+[node name="Position" parent="UI/CanvasLayer/BottomLeftMargin/VBoxContainer" instance=ExtResource("8_jr2jn")]
 layout_mode = 2
-script = ExtResource("8_fge13")
+script = ExtResource("11_k0017")
 
-[node name="Velocity" parent="UI/CanvasLayer/BottomLeftMargin/VBoxContainer" instance=ExtResource("6_076g5")]
+[node name="Velocity" parent="UI/CanvasLayer/BottomLeftMargin/VBoxContainer" instance=ExtResource("8_jr2jn")]
 layout_mode = 2
-script = ExtResource("9_f25hg")
+script = ExtResource("12_dgr41")
 
 [node name="Viewport" type="SubViewportContainer" parent="."]
 texture_filter = 1
@@ -148,7 +126,7 @@ current = true
 fov = 90.0
 size = 10.0
 far = 100.0
-script = ExtResource("9_qfhy4")
+script = ExtResource("13_y4waa")
 center = NodePath("..")
 follow_speed = 5.0
 
@@ -157,15 +135,5 @@ unique_name_in_owner = true
 extra_cull_margin = 16384.0
 mesh = SubResource("QuadMesh_7yiqd")
 
-[node name="Sun" type="DirectionalLight3D" parent="Viewport/SubViewport"]
-transform = Transform3D(0.984808, 0.122788, -0.122788, 0, 0.707107, 0.707107, 0.173648, -0.696364, 0.696364, 0, 10, 0)
-shadow_enabled = true
-directional_shadow_mode = 0
-script = ExtResource("5_pf5uw")
-
-[node name="Environment" type="WorldEnvironment" parent="Viewport/SubViewport"]
-environment = ExtResource("5_bll74")
-camera_attributes = ExtResource("6_8wfwf")
-
 [connection signal="timeout" from="Client/Ping/Timer" to="Client/Ping" method="send_ping"]
 [connection signal="timeout" from="Client/Login/Timer" to="Client/Login" method="send_login"]

client/world/Sun.gd

@@ -0,0 +1,5 @@
+@tool
+extends DirectionalLight3D
+
+# func _process(_delta):
+# 	(%PostProcessing as MeshInstance3D).mesh.surface_get_material(0).set_shader_parameter("light_direction", -global_basis.z)

client/world/World.tscn

@@ -0,0 +1,28 @@
+[gd_scene load_steps=4 format=3 uid="uid://mgyg01l21t0j"]
+
+[ext_resource type="PackedScene" uid="uid://tgmbtt7u172g" path="res://world/Arena.blend" id="1_1sh4g"]
+[ext_resource type="PackedScene" uid="uid://hnn0n1xc2qt7" path="res://world/Tree.blend" id="2_lunhk"]
+[ext_resource type="PackedScene" uid="uid://cb2t7bvvf3gwh" path="res://enemy/Slime.tscn" id="3_uuodv"]
+
+[node name="World" type="Node3D"]
+
+[node name="Arena" parent="." instance=ExtResource("1_1sh4g")]
+
+[node name="Trees" type="Node3D" parent="."]
+
+[node name="Tree" parent="Trees" instance=ExtResource("2_lunhk")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 5.11323, 0, -4.64839)
+
+[node name="Tree2" parent="Trees" instance=ExtResource("2_lunhk")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 5.11323, 0, 5.35161)
+
+[node name="Enemies" type="Node3D" parent="."]
+
+[node name="Slime" parent="Enemies" instance=ExtResource("3_uuodv")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.53558, 1.28057, -3.79687)
+
+[node name="Slime2" parent="Enemies" instance=ExtResource("3_uuodv")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 7.00829, 1.28057, -1.95247)
+
+[node name="Slime3" parent="Enemies" instance=ExtResource("3_uuodv")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.53558, 1.28057, -0.306177)

network/Account.gd

@@ -1,6 +0,0 @@
-class_name Account
-
-var password: String
-
-func _init(pw: String):
-	password = pw

server/Client.gd

@@ -5,6 +5,11 @@ var address: String
 var last_packet: int
 var auth_token: String
 var account: Account
+var player: Player
+
+func _init(p: PacketPeerUDP, a: String):
+	peer = p
+	address = a
 
 func is_logged_in() -> bool:
 	return auth_token != ""

server/Database.gd

@@ -0,0 +1,12 @@
+extends Node
+
+var accounts := {
+	"user1": Account.new("user1", "password"),
+	"user2": Account.new("user2", "password"),
+}
+
+func get_account(username: String):
+	if !accounts.has(username):
+		return null
+	
+	return accounts[username]

server/Server.gd

@@ -1,3 +1,4 @@
+class_name Server
 extends NetworkNode
 
 ## Port number.
@@ -10,7 +11,6 @@ extends NetworkNode
 @export var max_pending_connections := 4096
 
 var server := UDPServer.new()
-var last_statistics := Time.get_ticks_msec()
 var clients := {}
 var packet_count := 0
 var now := 0
@@ -19,15 +19,19 @@ func _init():
 	super._init()
 	server.set_max_pending_connections(max_pending_connections)
 	server.listen(port)
+	Performance.add_custom_monitor("Server/Clients", get_client_count)
+	Performance.add_custom_monitor("Server/Packets", get_packet_count)
 
 func _process(_delta):
 	server.poll()
+
+func _physics_process(_delta):
 	now = Time.get_ticks_msec()
 
 	# Accept new connections
 	while server.is_connection_available():
-		var peer: PacketPeerUDP = server.take_connection()
-		peer_to_client(peer).last_packet = now
+		var peer := server.take_connection()
+		peer_to_client(peer)
 
 	# Process packets from clients
 	for address in clients:
@@ -35,42 +39,60 @@ func _process(_delta):
 		var peer = client.peer
 
 		while peer.get_available_packet_count() > 0:
+			client.last_packet = now
 			var packet = peer.get_packet()
 			handle_packet(packet, peer)
-			client.last_packet = now
 			packet_count += 1
 
-	# Show statistics
-	if now > last_statistics + 1000:
-		for address in clients.keys():
-			var last_packet_time = clients[address].last_packet
+	# Disconnect
+	for address in clients.keys():
+		var client = clients[address]
+		var last_packet_time = client.last_packet
 
-			if now - last_packet_time > timeout:
-				peer_disconnected(address)
-				clients.erase(address)
+		if now - last_packet_time > timeout:
+			peer_disconnected(client)
+			clients.erase(address)
 
-		print("[Server] %d clients | %d packets" % [clients.size(), packet_count])
-		packet_count = 0
-		last_statistics = Time.get_ticks_msec()
+func broadcast(packet: PackedByteArray):
+	for address in clients:
+		clients[address].peer.put_packet(packet)
+
+func broadcast_others(packet: PackedByteArray, exclude: Client):
+	for address in clients:
+		var client = clients[address]
+
+		if client == exclude:
+			continue
+		
+		client.peer.put_packet(packet)
+
+func get_client_count() -> int:
+	return clients.size()
+
+func get_packet_count() -> int:
+	var tmp := packet_count
+	packet_count = 0
+	return tmp
 
 func peer_address(peer: PacketPeerUDP):
 	return "%s:%d" % [peer.get_packet_ip(), peer.get_packet_port()]
 
+func peer_connected(c: Client):
+	print("[%s] Connected." % c.address)
+
+func peer_disconnected(c: Client):
+	print("[%s] Disconnected." % c.address)
+
+	if c.player:
+		c.player.queue_free()
+
 func peer_to_client(peer: PacketPeerUDP) -> Client:
 	var address = peer_address(peer)
 
 	if !clients.has(address):
-		var client = Client.new()
-		client.peer = peer
-		client.address = address
+		var client = Client.new(peer, address)
 		clients[address] = client
 		peer_connected(client)
 		return client
 	
 	return clients[address]
-
-func peer_connected(c: Client):
-	print("[Server] Connected: ", c.address)
-
-func peer_disconnected(c: Client):
-	print("[Server] Disconnected: ", c.address)

server/Server.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=6 format=3 uid="uid://b0e7n717sqeo6"]
+
+[ext_resource type="Script" path="res://Database.gd" id="1_58s18"]
+[ext_resource type="Script" path="res://Server.gd" id="1_gwiwx"]
+[ext_resource type="Script" path="res://handler/Ping.gd" id="3_l2i5g"]
+[ext_resource type="Script" path="res://handler/Login.gd" id="4_7aotg"]
+[ext_resource type="PackedScene" uid="uid://148x2hp1hjq0" path="res://player/Player.tscn" id="5_26wo2"]
+
+[node name="Main" type="Node"]
+
+[node name="Server" type="Node" parent="."]
+unique_name_in_owner = true
+script = ExtResource("1_gwiwx")
+
+[node name="Database" type="Node" parent="."]
+unique_name_in_owner = true
+script = ExtResource("1_58s18")
+
+[node name="Ping" type="Node" parent="."]
+script = ExtResource("3_l2i5g")
+
+[node name="Login" type="Node" parent="."]
+script = ExtResource("4_7aotg")
+player_scene = ExtResource("5_26wo2")
+
+[node name="Players" type="Node3D" parent="."]
+unique_name_in_owner = true

server/grid/Cell.gd

@@ -0,0 +1,3 @@
+class_name Cell
+
+var player_list := [] as Array[Player]

server/grid/Grid.gd

@@ -0,0 +1,31 @@
+extends Node
+
+## Width of the grid in cells.
+const width := 100
+
+## Height of the grid in cells.
+const height := 100
+
+## The size of a single cell.
+const cell_size := 10.0
+
+var cells: Array[Cell]
+
+func _init():
+	cells.resize(width * height)
+	
+	for i in cells.size():
+		cells[i] = Cell.new()
+
+func notify_cell_changed(player: Player, old_pos: Vector2i, new_pos: Vector2i):
+	print(player.name, " cell changed! ", old_pos, " ", new_pos)
+	add_player(player, new_pos)
+	remove_player(player, old_pos)
+
+func add_player(player: Player, coords: Vector2i):
+	var cell := cells[coords.x + coords.y * height]
+	cell.player_list.append(player)
+
+func remove_player(player: Player, coords: Vector2i):
+	var cell := cells[coords.x + coords.y * height]
+	cell.player_list.erase(player)

server/handler/Login.gd

@@ -5,10 +5,8 @@ enum {
 	FAIL = 1,
 }
 
-var accounts := {
-	"user1": Account.new("password"),
-	"user2": Account.new("password"),
-}
+## Player scene instantiated for each client.
+@export var player_scene: PackedScene
 
 func _ready():
 	%Server.set_handler(Packet.LOGIN, self)
@@ -23,33 +21,45 @@ func handle_packet(data: PackedByteArray, peer: PacketPeer):
 	var login_request = JSON.parse_string(data_string)
 
 	if login_request.size() < 2:
-		fail_login(peer)
+		login_fail(peer)
 		return
 	
 	var username = login_request[0]
 	var password = login_request[1]
+	var account = %Database.get_account(username)
 
-	if !accounts.has(username):
-		fail_login(peer)
+	if account == null || account.password != password:
+		login_fail(peer)
 		return
 
-	if accounts[username].password != password:
-		fail_login(peer)
-		return
-	
 	client.auth_token = generate_auth_token()
+	client.account = account
+	spawn_player(client)
+	login_success(peer, client.auth_token)
 
+func spawn_player(client: Client):
+	var player := player_scene.instantiate()
+	player.client = client
+	player.server = %Server
+	player.name = client.address
+	client.player = player
+	%Players.add_child(player)
+
+func generate_auth_token() -> String:
+	var crypto = Crypto.new()
+	var buffer = crypto.generate_random_bytes(32)
+	return Marshalls.raw_to_base64(buffer)
+
+func login_success(peer: PacketPeer, auth_token: String):
 	var buffer := StreamPeerBuffer.new()
 	buffer.put_8(Packet.LOGIN)
 	buffer.put_8(SUCCESS)
-	buffer.put_data(client.auth_token.to_ascii_buffer())
+	buffer.put_data(auth_token.to_ascii_buffer())
 	peer.put_packet(buffer.data_array)
 
-func fail_login(peer: PacketPeer):
+func login_fail(peer: PacketPeer):
 	var buffer := StreamPeerBuffer.new()
 	buffer.put_8(Packet.LOGIN)
 	buffer.put_8(FAIL)
 	peer.put_packet(buffer.data_array)
 
-func generate_auth_token() -> String:
-	return "secret"

server/handler/Ping.gd

@@ -10,5 +10,4 @@ func handle_packet(data: PackedByteArray, peer: PacketPeer):
 	if data.size() > 0:
 		buffer.put_8(data[0])
 	
-	peer.put_packet(buffer.data_array)
-
+	peer.put_packet(buffer.data_array)

server/player/Player.gd

@@ -0,0 +1,24 @@
+class_name Player
+extends CharacterBody3D
+
+var client: Client
+var server: Server
+var cell: Vector2i
+
+func _ready():
+	print("Server player spawned")
+	Grid.notify_cell_changed(self, cell, cell)
+	# var buffer := StreamPeerBuffer.new()
+	# buffer.put_8(Packet.STATE)
+	# server.broadcast(buffer.data_array)
+
+func _physics_process(_delta):
+	move_and_slide()
+	update_grid()
+
+func update_grid():
+	var new_cell := Vector2i(int(position.x / Grid.cell_size), int(position.z / Grid.cell_size))
+	
+	if new_cell != cell:
+		Grid.notify_cell_changed(self, cell, new_cell)
+		cell = new_cell

server/player/Player.tscn

@@ -0,0 +1,14 @@
+[gd_scene load_steps=3 format=3 uid="uid://148x2hp1hjq0"]
+
+[ext_resource type="Script" path="res://player/Player.gd" id="1_46xlc"]
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_y8kaq"]
+radius = 0.25
+height = 1.6
+
+[node name="Player" type="CharacterBody3D"]
+script = ExtResource("1_46xlc")
+
+[node name="Collision" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.8, 0)
+shape = SubResource("CapsuleShape3D_y8kaq")

server/project.godot

@@ -0,0 +1,38 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="Server"
+run/main_scene="res://Server.tscn"
+config/features=PackedStringArray("4.2", "Forward Plus")
+run/max_fps=100
+run/low_processor_mode_sleep_usec=1
+
+[audio]
+
+driver/driver="Dummy"
+
+[autoload]
+
+Grid="*res://grid/Grid.gd"
+
+[debug]
+
+settings/stdout/verbose_stdout=true
+
+[editor]
+
+run/main_run_args="--headless --text-driver Dummy"
+
+[physics]
+
+3d/run_on_separate_thread=true
+common/physics_ticks_per_second=100

world/Sun.gd

@@ -1,5 +0,0 @@
-@tool
-extends DirectionalLight3D
-
-func _process(_delta):
-	(%PostProcessing as MeshInstance3D).mesh.surface_get_material(0).set_shader_parameter("light_direction", -global_basis.z)