How do I make it so the client loads into the same scene as the server in a multiplayer game?

PopeRigby

My game starts up with a GameController.tscn, and then GameController.tscn reads a variable called map stored in a singleton. That map variable is set to a map scene that the play specifies in the main menu, and GameController.tscn adds it as a child. As soon as a player connects, I want the player's map variable to be set to the server's map variable so the player and server will be in the same map. Is this the best way to do this? If is, how do I do it?

Here's my source code: https://git.haddock.cc/ScrapjackStudios/slayer/src/branch/multiplayer Specifically, here's GameController.gd: https://git.haddock.cc/ScrapjackStudios/slayer/src/branch/multiplayer/GameController.gd

TwistedTwigleg

I'm just guessing based on limited network experience, so please take this with a grain of salt, but you probably want to have the network/server send the client a RPC call that tells the client to load the scene, passing the map variable along with it. Then you have the client load the scene, and once the load has finished, you have the client ask the server for all the networked Nodes/Instances, so it can locally create them and track them, making the other networked things appear in the scene as expected.

At least, that's what I would look at trying, but again, I only have limited networking experience. :sweat_smile:

PopeRigby

That's what I was going to do, but I wondering if the server show send the variable when the player connects, or if the player should ask for it when the connect.

TwistedTwigleg

You may need to have a singleton you can RPC to, though I have no idea how doable or feasible that is, to be honest. I've only done a tiny bit of networking with Godot.

If you haven't already, maybe see if the other Godot communities have an idea? There might be more users who have experience with networking there.

PopeRigby

I think I can just do $"/root/Singleton".rpc("my_func") to RPC a singleton.

PopeRigby

Yeah that doesn't seem to be working for some reason.

TwistedTwigleg

Hmm, then I guess sending the RPC call might be difficult, since you'd need a way to tell the network that you've loaded the map and need the other networked objects to be spawned... Maybe you could have the scene tree point to a singleton, have a function that performs RPC calls to the scene tree, and then pass these RPC calls to the singleton? Seems sloppy though and I'm fairly positive there has to be a better way, I just don't know what it is. I'll keep thinking about it and will post if I think of something.

PopeRigby

Ok. I have it working mostly now. The only problem is that the server's player isn't getting spawned in the client's game. It works perfectly the other way around, even the movement of the client works. Here are the errors that the client is getting when it tries to run:

remote func _request_players(request_from_id):
    if get_tree().is_network_server():
        for peer_id in players:
            if( peer_id != request_from_id):
                rpc_id(request_from_id, '_send_player_info', peer_id, players[peer_id])

PopeRigby

I just had to loop through the already connected players and spawn them in on ready.

TwistedTwigleg

Great! I'm glad you got it working! (Sorry about the delays in replying. Life stuff got in the way the last several days :sweat_smile: )

PopeRigby

No problem :)