Godot Version
4.2.2stable
Question
Hello,
I’m currently working on coding a simple multiplayer game as a hobby project. While I’m making good progress, I’m encountering some issues understanding RPC calls in the multiplayer setup.
Here’s a brief overview of my current setup:
Server:
extends Node
@onready var multiplayer_peer = ENetMultiplayerPeer.new()
@onready var char_selection = %CharSelection
const MAX_PLAYERS = 4
var players_connected = 0
# Called when the node enters the scene tree for the first time.
func _ready():
multiplayer.connect("connected_to_server", Callable(self, "_on_connected_ok"))
multiplayer.connect("connection_failed", Callable(self, "_on_connected_fail"))
multiplayer.connect("peer_connected", Callable(self, "_on_player_connected"))
multiplayer.connect("peer_disconnected", Callable(self, "_on_player_disconnected"))
multiplayer.connect("server_disconnected", Callable(self, "_on_server_disconnected"))
func _on_host_btn_pressed():
if error == OK:
multiplayer.multiplayer_peer = multiplayer_peer
%ConsoleText.text = "Creating the server..."
await get_tree().create_timer(0.2).timeout
%ConsoleText.text = "Server created!"
await get_tree().create_timer(0.5).timeout
%ConsoleText.text = "Waiting for players...(1/4)"
players_connected += 1
elif error != OK:
%ConsoleText.text = "Error creating a server! Error code: " + str(error)
func _on_join_btn_pressed():
multiplayer_peer.create_client(%JoinAddress.text, int(%JoinPort.text))
multiplayer.multiplayer_peer = multiplayer_peer
players_connected += 1
%ConsoleText.text = "Connecting..."
func _on_connected_ok():
%ConsoleText.text = "Server found!"
await get_tree().create_timer(0.5).timeout
set_player_name()
func _on_connected_fail():
%ConsoleText.text = "Server not found!"
func _on_player_connected(_id):
%ConsoleText.text = "Connected to the server!"
await get_tree().create_timer(0.5).timeout
players_connected += 1
update_console_text()
if players_connected >= 2:
start_game()
func _on_player_disconnected(id):
multiplayer_peer.close()
players_connected = 0
update_console_text()
return_to_lobby()
if (id == 1):
%ConsoleText.text = "Server closed!"
else:
%ConsoleText.text = "Someone disconnected, re-host the server!"
func set_player_name():
char_selection.rpc("set_player_name", %PlayerName.text)
func update_console_text():
%ConsoleText.text = "Waiting for players...(" + str(players_connected) + "/4)"
func start_game():
%GridContainer.visible = false
%ConsoleText.visible = false
%CharSelection.visible = true
func return_to_lobby():
%GridContainer.visible = true
%ConsoleText.visible = true
%CharSelection.visible = false
The server setup is straightforward. Users can host games, and clients can join. The “Start Game” button doesn’t have any functionality yet.
Client Interface:
In a specific part of my code, I have the following function:
func set_player_name():
char_selection.rpc("set_player_name", %PlayerName.text)
The intention here is to use an RPC call to transmit the player’s name to another scene (char_selection): a lobby where players can choose their character classes.
Regarding char_selection:
extends Control
var players = []
var list = []
# Called when the node enters the scene tree for the first time.
func _ready():
if is_multiplayer_authority():
%StartGame.disabled = false
else:
%StartGame.disabled = true
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(_delta):
pass
@rpc("any_peer", "call_local")
func set_player_name(name):
print(name)
Currently, I’m only printing the received player name for testing purposes.
However, the problem I’m facing is that the RPC call prints the client’s name twice without printing the host’s name. I’m wondering if I’m overlooking something in my setup.
To summarize my questions:
- Why does the RPC call print the client’s name twice but not the host’s name?
- Is my approach correct if want to consider the host as a player as well?
- Do you have any general advice or tips for working with multiplayer functionality in Godot?
EDIT: Found another issue: both client and host are treated with priority and both are seen as server.
Thanks in advance for any assistance you can provide. Have a great day!