archived-networking

[river shadow]

as u can see.. it definately is in that engine version

[river shadow]

An update.... I re-installed 2021LTS via the hub.. I made a dedicated server build, and was able to connect to it via the client. 🙂

[dire crag]

For who exactly is IsLocalPlayer true? Is it true for children of the PlayerObject? Can I manually set it true for objects spawned by my local player object? I have a local player object that works more as a manager, and it instantiates the actual object that the player controls, including its camera, which I of course want to disable if its not my own. How can I do that properly?

[sharp axle]

You would use IsOwner instead for that case. I believe IsLocalPlayer would only be true for the root player object if it had children. You can not spawn child network objects but you can reprarent them after spawning.

[dire crag]

IsOwner is true for all spawned objects on the Host tho since it is also server

[sharp axle]

You can use SpawnAsPlayerObject() if you only have one playerobject at a time. Otherwise you will need some other team identifier

[charred umbra]

I assume this is not networking related but Il drop it here incase I'm wrong. I'm trying to recolour player objects. The line playerMeshRenderer.material.color = IsLocalPlayer ? Color.magenta : Color.green; doesn't have any effect. I've tried SetColor, using sharedMaterial.color and copying the material, changing the colour then reassigning the material back. I'm on 2022.3.47f1. My current code:

public override void OnNetworkSpawn()
{
    // We should create a unique Material for each Player GameObject
    Material uniqueMat = new Material(playerMat);
    uniqueMat.name = $"{this.gameObject.name} Material";
    playerMeshRenderer.material = uniqueMat;

    // Move the Player and Recolour its material
    if (NetworkManager.Singleton.IsServer)
    {
        transform.position = IsLocalPlayer ? Vector3.left * 4F : Vector3.right * 4F;
        SubmitPositionRequestServerRPC(transform.position);

        playerMeshRenderer.material.color = IsLocalPlayer ? Color.magenta : Color.green;
        NotifyOfRecolourRPC(playerMat.color.r, playerMat.color.g, playerMat.color.b);
    }
}

Bizarely, this code works in Start() but not in OnNetworkSpawn():

Material uniqueMat = new Material(playerMat);
uniqueMat.name = $"{this.gameObject.name} Material";
uniqueMat.color = Color.red;
playerMeshRenderer.material = uniqueMat;

[dense vale]

Hey y'all, I have been looking into the different networking options, and it seems like for large multiplayer games most people go with fishnet, my best guess is that fishnet can allow many dozens, maybe even hundreds of connections to play in real time? The classical advice seems to be to use PUN 2 for games with smaller rooms? I am planning a game sort of dauntless, a fast paced action rpg with lots of realtime combat, but I ideally would like up to 20 people in a room together to emulate large scale dungeon crawling, does anyone know if this would work with PUN 2? Would it be practical or cost effective? Is Fishnet the better option for pricing? I am inclined to use PUN 2 for its match making and room management, but it's hard to decipher what the real strengths and weaknesses of these different services are.

[sharp axle]

Any networking solution currently available can handle 20 or so players. PUN has been deprecated though so you would want to Fusion 2. But Unity Netcode or Mirror can handle it just fine as well. Things get tricky if you need fast-paced performance or more than about 100 players

[dense vale]

Thank you so much, it's been hard to understand that much just searching online.

[dire crag]

So apparently, if I make a serverrpc to spawn it, as opposed to just spawn it when the player object spawns on the server, and give it the client id, and then do SpawnWithOwner, then it only sets the client as owner and the server actually has IsOwner fasle... that feels like something unintended ngl

[sharp axle]

That's right. If you SpawnWithOwner(clientId) then the server will not be the owner

[dire crag]

Well, guess thats how I wanna do it then to work properly lmao

[cobalt thicket]

Hi all, I'm doing a test update of my project from Unity 2022 with Lobbies and Relay, to Unity 6 with Sessions and Widgets. There seem to be a few duplicate Types within the two. Can both packages, Lobby and Sessions, work in the same project or do I need to remove all my old Lobby and Relay managers?

[sharp axle]

The loading screen shouldn't be its own scene. Just a full screen UI panel.

[sharp axle]

The old managers will still work but you have to uninstall the relay and lobby packages(matchmaker and multiplay as well). They are included with the Multiplayer Services SDK

[ornate zinc]

Anyone in here familiar with WebRTC in unity? I got some issues setting up the videostream correctly, as my stream state is stuckin "checking", but both get the offer and answer from both sides.

[cobalt thicket]

Hey @sharp axle, that's what I was hoping but I've found that even after they are uninstalled i'm still getting errors. Specifically anything referencing Lobbies. I get this error -

error CS0433: The type 'Lobby' exists in both 'Unity.Services.Lobbies, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' and 'Unity.Services.Multiplayer, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'

[sharp axle]

You might need to restart Unity or delete the library folder and reimport

[cobalt thicket]

I've tried that but still getting issues Lobbies: Lobbies.Instance.CreateLobbyAsync - giving an error of - "error CS0234: The type or namespace name 'Instance' does not exist in the namespace 'Lobbies' (are you missing an assembly reference?)"

[sharp axle]

https://docs-multiplayer.unity3d.com/netcode/current/basics/scenemanagement/scene-events/

[sharp axle]

should be LobbyService.Instance

[cobalt thicket]

Thank you, missed that. Too many bits of old code mixed in with new.

[sharp axle]

You can turn off Scene Management
You can use Scene Validation to prevent clients from loading certain scenes
Network Scene Manager scene events load and unload have an AsyncOperation you can listen to for progress

[ripe mesa]

do you have any tips, to not singleton the LobbyService?

[tame slate]

https://docs.unity3d.com/ScriptReference/SceneManagement.SceneManager.LoadSceneAsync.html just use the normal SceneManager's Async Loading

[tame slate]

Per the docs: If you load a scene on the server-side using UnityEngine.SceneManagement.SceneManager then it will be synchronized with late joining clients unless you use server-side scene validation

Then they should be loaded using the NetworkSceneManager so you can make use of SceneEvents

That would be my guess - using the normal SceneManager probably doesn't trigger any SceneEvents even if the loaded scene is being synced for late joining clients

So get clients to load the inventory scene themselves.

Then use Scene Validation to prevent late joining clients from getting it automatically synced when they join.

https://docs-multiplayer.unity3d.com/netcode/current/basics/scenemanagement/using-networkscenemanager/#scene-validation

Seems like it

[dire crag]

This comes coming up on an object that I spawn as a child of another object which has a NetworkObject, it comes up on the NO-less prefab, is there a way I can mark it so this message stops coming up? I cant just give it a NetworkObject component, because then it says that nested NOs are not supported, this is really annoying to deal with :(

[sharp axle]

There is a setting in the project settings to disable that message

If you mean the initial load, I'm not sure there is. I would pop a loading UI between StartClient() and the LoadComplete event

[viral ether]

^ lol

I'm using netcode for gameobjects

and there's 100 cards in the table, which I would like to somewhat synchronize their transform

and like 20 more objects which I would like to do the same

would that be super bad? 120 objects with client network transform?

I'm trying to achieve a game... somehwat like tabletop simulator, where it simulates a real life game

so people can try our game before buying it, and not needing to own tabletop simulator```

[tame slate]

It probably wouldn't be great. I mean, I'm sure you could optimize the settings on the component and only move them in simple ways - but that is a lot of Network Transforms.

[viral ether]

xD.... yeah...

[tame slate]

If it were me I would definitely look at a different approach.

Like using RPCs or NetworkVariables to sync to each client that a preset/predictable animation or movement should play locally for the card.

[tame slate]

You could even allow the owner client to move the cards around freely with the mouse, but only send this RPC or set this NetworkVariable when they're done and have placed the card so that other clients can play a preset animation/movement for the card.

[viral ether]

that sounds good

I had something like that in mind but

not sure how I will achieve it XD

I haven't done much with the cards yet, I'm just planning so

I'm open to ideas

void OnMouseUp()
{
    if (_dropLocation is CardPlaces.None)
    {
        transform.position = _lastPosition;
        transform.rotation = _lastRotation;

        if (_cardLocation is CardPlaces.Hand)
        {
            ResetCardPositionInHand();
        }
    }
    else
    {
        _boxCollider.isTrigger = false;
        _rb.isKinematic = false;
        ChangeCardLocation(_dropLocation);
        ChangeCardPositionRpc();
    }

    _dropLocation = CardPlaces.None;
    _isBeingDragged = false;
    _boxCollider.enabled = true;
    _handler.TransparentCardObject.SetActive(false);
}

[Rpc(SendTo.Server)]
void ChangeCardPositionRpc()
{
    transform.parent = this.transform.parent;
    transform.position = this.transform.position;
}```

something like this?

I need to add network object here, right?

[viral ether]

tag me for replies plz ❤️

[sharp axle]

I would have a single Card Hand manager class that would control all the graphics on the cards. It would have the network object on it and any network variables/RPCs needed. That way each card would not need its own network object

[quick perch]

For network varaibles, and a Distributed Authority system. How do I set them for all clients/host from either a client/host?

Can I just assign values to them like MyNV.Value = OtherValue; and then the local state will be sent on the next network tik, or will that only set the local state?
Or would I need a [Rpc(SendTo.Everyone)] that then sets the MyNV?

And if I set them dirrectly do I have to claim ownership before writing to them?

Likewise how do we make sure the NetworkVariable value is set before the network spawn?

[viral ether]

OnNetworkSpawn() maybe?

[quick perch]

Why you answering with a maybe. I can maybe all day XD

[viral ether]

Sometimes

[tame slate]

https://docs-multiplayer.unity3d.com/netcode/current/basics/networkbehavior-synchronize/#pre-spawn-synchronization-with-onsynchronize

[quick perch]

I read that, but it was put in context of an authoratative system. Would the "Server" be whatever client spawned the object?

Plus that section is a bit, vague

It is missing the context of networkVariables and setting stuff on awake.

https://docs-multiplayer.unity3d.com/netcode/current/basics/networkvariable/#synchronization-and-notification-example

Is more relevant, but they set the initial state of the NetworkVariable in OnNetworkSpawn, where it was said earlier that the NV state should be synced already by then. Which was leading me to think you can set it on awake.

Though maybe I will need to do a isOwner check instead of isServer(as I have no clue how that behaves on a Distributed Authority network)

[tame slate]

To my knowledge you will get warnings/errors when trying to set the value in awake. OnSynchronize is the earliest you can safely set it AFAIK.

[tame slate]

I know you're using "server" as a way to compare between DA and Client-Server, but best to get away from that to prevent mixing up the two. There is no true server with DA. Ownership/Authority is given to the client who spawns an object unless changed afterwards.

This means NetworkVariable Write Permissions are given to the owner by default in DA. So you can check HasAuthority when setting a NetworkVariable. If true, you can set a value directly. If false, you can use [Rpc(SendTo.SendTo.Authority)] to request the owner to set a value.

[viral ether]

That's fair enough... I have to think how I'll do it

[quick perch]

This makes alot of sense. I am still not 100% on how to properly set the initial state of the network variable before spawning across clients

Can I simply Instantiate the GO and then in the Awake do a HasAuthority, and set initial values? Then that gets replicated across?

[sharp axle]

no Awake() is called before its on the network. You want to use OnSynchronize()

[quick perch]

Can you not set values before the object is sent across the network? That seem unperformant if we are already sending the data about the Behavior to spawn it?

[sharp axle]

setting the value right after spawning is viable too. On other clients the network variable should be already up to date when OnNetworkSpawn() is called

[quick perch]

Okay, and for that Awake works with a HasAuthority?

Aka so that code doesn't get called on the other clients that are gettting sent spawn.

[sharp axle]

Awake will not work because its not on the network at that time.

[quick perch]

Isn't that what we want though? Because the state will be set before it is on the network, so when it gets sent to the network the state is already set?

Oh the HasAuthority won't right

I remember reading that somewhere

[sharp axle]

https://docs-multiplayer.unity3d.com/netcode/current/basics/networkbehavior/#spawning
don't expect netcode-distinguishing properties (like IsClient, IsServer, IsHost, for example) to be accurate within Awake and Start methods.

[elder moss]

why isnt this possible?

[fluid walrus]

the type of OnRegistrationResponce (sic) isn't Action<RegistrationResponse>, C# has to convert it to a delegate of that type when you call it, but C# also won't infer type arguments from things which need that kind of conversion

if you cast it to Action<RegistrationResponse> it should work, but at that point you might as well specify the type on the call

[lapis yarrow]

If you want to add coop into your game, which solution is better: Unity Networking or Photon Fusion?

[ripe mesa]

What kind of coop, any game example?

[lapis yarrow]

think of zelda 4 swords

nothing fancy. Just max 4 ppl on a 2D top down adventure game

[tame slate]

Either are perfectly suitable for that. Just comes down to whatever solution you like more and are more comfortable working with

[lapis yarrow]

The current version is working with Photon Pun 2, but 20 CCUs is very limited. Thats why I want to change it to Fusion or Unity Network.

I assume Unity Network doesnt have a CCU-limitation because its player hosted

[tame slate]

I'd assume Pun 2 to Fusion is probably a much easier port than switching to NGO

[lapis yarrow]

I have to rewrite anything no matter what. Thats why I m asking.

I just want to know which is easier to handle and future proof. I dont mind to rewrite everything from scratch as long it works well. I converted my game already from Pun to Mirror to Pun again. So, I would mind to switch to Unity Networking.

[tame slate]

I'd probably recommend NGO in that case. A simpler 4 person co-op game wouldn't take full advantage of most of Fusion's features + I think you're still locked in to using Photon Relay/Hosting services and their pricing.

NGO is suited primarily for smaller scale co-op and I think would probably beat out Fusion in terms of ease-of-use in your case. Added bonus that you're familiar with Mirror because it's quite similar to NGO.

If you're really looking to future proof, I'd recommend starting off using Unity 6 and NGO 2.0.0. As well as making use of the Multiplayer Services package: https://docs.unity.com/ugs/en-us/manual/mps-sdk/manual

[lapis yarrow]

Awesome, thank you very much

[vivid zodiac]

https://hatebin.com/hmtjbjfhqr
What would cause this simple code to not sync between two players, host and client. The host creates a server and the prelobby perfectly starts the countdown and displays one player connected. Now when as a client i type in the host's ip and conenct to the same prelobby, the host's game now displays that 2 players are connected and the countdown is still going smoothly but the client's player count is for some reason 0 and the countdown is completely unsynced meaning it starts again from 0.

I already tried asking chat gpt but he came up with nothing usefull, i also tried rewriting it completely but that also did nothing.

[tame slate]

NetworkServer is a class in Mirror that is used for a server/host. It's inaccessible and/or all of it's properties are empty for a client as it's not used because a client only uses the class NetworkClient. When using Mirror you really shouldn't be using NetworkServer or NetworkClient anyway. Try seeing if NetworkManager has reference to the player/connection count instead.

You're not syncing the countdown at all. You're just running a countdown on each instance of this script separately. I would look at SyncVar to see how you can use it to make a synced timer.

[vivid zodiac]

Oh, alrighties that's why. Thanks ill definitely look into that!

[vivid zodiac]

I fixed on the script but now i got another issue, no UI is updating like everything is freezed in the prelobby and the error message says "NullReferenceExpection: Object reference not set to an instance of an object PreLobby.Update () (at Assets/PreLobbyStuff/Scripts/PreLobby.cs28)

Completely no idea what would be causing this error, All text labels and buttons are properly assigned in the inspector. The code seems normal too.
https://hatebin.com/fiolgmbqrw

i tried some debugging

void Update()
{
    Debug.Log("0");

    if (isServer)
    {
        Debug.Log("1");
    }
}

Only 0 is going throught console.

the isServer is for some reason giving the same error

[tame slate]

is this script running before you call StartHost?

[vivid zodiac]

Im not sure but i would say i doubt that. StartHost is called in the MainMenu when the player clicks create server, then the scene switches to the prelobby and this issue arises.

 public void OnCreateServerButtonClicked()
 {
     NetworkManager.singleton.StartHost();
     StartCoroutine(LoadSceneAfterDelay(0.5f));
 }

This would be the part in the main menu that creates the server before prelobby

[vivid zodiac]

I have found an solution, my canvas was missing NetworkIdentity

[blissful parrot]

When building a multiplayer game for webgl, with NGO, and the use of dedicated servers. Is it true i'll still need Lobby + Relay in order to easily connect people to the dedicated server?

[stiff ridge]

Your first Fusion app comes with 100 CCU for free. Permanently and you can release with it.
Shared mode is using a similar approach as PUN but is more convenient with plenty of samples...

[sharp axle]

Only if you are using Unity Server Hosting or other hosting service with dynamic allocations

[blissful parrot]

ahh yeah good point, since the Multiplay (Unity Dedicated servers) spins up and spins down servers when Matchmaker requests are processed.

This means that it's not a static IP/port. So it means we'll need Lobbies to well, let us find the game. And i use relay for the webgl part. Since well, i have no clue if Relay is needed but i think it works well when using Lobbies. Also to punch trhough it can be needed?

Thanks a lot, your answer opened my eyes.

[cobalt thicket]

Hi, when i try to change a network variable that is in a [System.Serializable] class I get a warning "NetworkVariable is written to, but doesn't know its NetworkBehaviour yet". Is this something I need to worry about?

[fluid walrus]

assuming this is NGO, i'm pretty sure all NetworkVariables need to members of a NetworkBehaviour class

[sharp axle]

And that network behavior needs to be on a network object spawned in the scene

[cobalt thicket]

This is a snippet of the code, if I take the NetVar out of the MissionScene class then its fine but within it gives me that warning. either way it does actually change.

public class MissionManager : NetworkBehaviour
{
[System.Serializable]
public class MissionScene
{
public string sceneName;
public NetworkVariable<int> scenesAllowed = new NetworkVariable<int>();
}

public static MissionManager Instance;
public MissionScene[] missionScenes;

}

Just want to make sure i'm not doing something wrong. It is working and its only a warnign not an error so...

[sharp axle]

Is that network variable actually syncing?

[cobalt thicket]

yes it is

Should it not?

[sharp axle]

I wouldn't think so. But if it works, it works. I guess the network manager goes through all the subclasses as well

[cobalt thicket]

Would there be another way to do this that is safer? It is working but still giving me warning which i'm not very happy on leaving.

I see that nested network variables arent supported from an old post 2021 but cant find anything recent

[sharp axle]

I would make MissionScene a struct and implement INetworkSerializable. that way you can just have a NetworkList<MissionScene>

and not bother with nested network variables

[cobalt thicket]

Thanks, i'll take a look!

[safe vapor]

Hey guys,
What would be the best alternative for "Multiplayer Play Mode"?
I'm working on a project, "Unity Dedicated Server + PlayFab + Mirror". There is an open-source tool, ParrelSync but it seems like the author dropped it, and I'm looking for something similar.
Thanks

[sharp axle]

If you are not on Unity 6 then ParrelSync is the alternative.

[safe vapor]

so, it still works with the Unity 2022.3.x ?

[sharp axle]

it was working up still 2023.3 at least

[safe vapor]

Thank you!
It is always a pity when such rare and fantastic tools are dropped.

[marsh forum]

Hi, I'm using unity 6 22f1 presently to develop a prototype for a coop game, i wanted to test and use the new features etc.
I want each player play in first person

I got two players to succesfully conenct to one session (one virtual) off of the same player prefab. however for whatever reason the camera that is assigned to the prefab only works for the host player and doesnt seem to exist at all for the second player regardless of what i try to do. i thought to go around this by making a template camera in the hierarchy and assign it to players after the prefab has been used but the result is the same, first play recieves camera, second player does not
am i just being stupid and missing something obvious?

[tame slate]

How are you assigning the camera?

[marsh forum]

I gave the template camera a specific tag that only it has, i search it via FindWithTag, then instatiate it and then set it as the child of the player

it does work succesfully for the first player, and each player that joins has a script that should run this upon joining the session

[tame slate]

Hi, I'm using unity 6 22f1 presently to

[sharp axle]

If you haven't already, post this in #1062393052863414313

[plush linden]

i use netcode 1.0.0pre-9, and E-net transport 2.0 to develop a moba mobile game. After a lot of networkobject Destory , I find system use more memory on Memery Profiler。Because it like Array,List,Dictionry did not clear and give null. Who know which version netcode solve this question?

i can use object-pool solve this question=.=.eeeee!!!!!

[vivid zodiac]

Hello! Im using mirror for making a multiplayer game and i have a issue
This method is supposed to turn off the PreLobbyCanvas once the round start, and it does that just perfectly. However the problem is it only does that on the Host, so the person who starts the server. All the clients ( The people who join the server) still see their canvases enabled. What could be causing this issue?

[viral ether]

after taking my time, the client asked me to have all objects be network client transform

they want the project to feel as scuffed as possible, like if it was playing in real life... xDDDDDDDD

for every card to sync their position in real time, making them a client network transform

having NetworkBehaviour inside of them, how does that sound?

if not, make a script in a handler that will tick 1 card every x frames, to sync their position to the other player

[tame slate]

That’s going to be a bandwidth and performance nightmare I’d say.

[viral ether]

how bad are we talking?

doesn't tabletop simulator do it that way?

[tame slate]

It depends on how you optimize the movement and the NetworkTransform

But if they want it to be “real-time” you’re not going to be able to do much if that.

[tame slate]

I don’t really play any, but I’d doubt it.

[viral ether]

it's a bunch of gameobjects that syncronize their transforms

scale, rotation and position

[tame slate]

Most of them probably send that state of the board to clients and have the clients play animations and move things locally based on the state.

As opposed to syncing every single transform value in real-time.

[viral ether]

welp

😦

I could prepare some questions on how you would do things, with images and you can help me know what would be a better way to approach what I'm trying to do

[viral ether]

you're right, they only sync the position in real time

or have a distance threshold, if that distance is passed they do a movement transition from point A to B

[sharp axle]

Thats how network transforms already work.

The problem you'll run into is the sheer amount of network objects

[viral ether]

100 - 120?

[sacred schooner]

Pretty sure card games sync the general board state, or single actions (while ensuring the same state) happening with cards, and replay those actions locally. So rather than networktransforms, sync the initial board state and broadcast any action to the client, eg. drawing a card, just as an event with some cardID and maybe playerID to make it clear who did that. You send a few dozen bytes tops only when needed rather than just a horrendous amount for each card in real time

same with an attack, attackerCardID, victimCardID when a card attacks another (I'm thinking in hearthstone terms but you get the idea)

[viral ether]

have ya'll played Tabletop Simulator?

[sacred schooner]

Is it where you have "hands" and can manipulate each object as if it were a physical one?

[viral ether]

probably

[sacred schooner]

lmao yeah, so they by nature do server-auth networktransforms, in real-time. That's kind of needed for them, from the screenshot I see a vast majority of cards wont be moved at once in your game though. Can/Should they interact with eachother physically while moved?

If not, you can only sync positions per-frame when selected

that sounds like a banger optimization

altough, that is kind of solved already by threshholds

[sharp axle]

Its been a while since i've played it multiplayer, but i'm not entirely convinced TTS uses server auth physics.

[sacred schooner]

Yeah, just assumed but if it's not competitive at all then client-auth is fully possible for better responsiveness.

Damn, I say try doing it the simple and blunt way, see how it behaves under bad network conditions, and just how much bandwidth it draws when you try to absolutely do as much destruction as possible, and go from there. You can do custom messaging as you described, or if you just need the position to be accurate for another player eventually just send a pulse with all cards positions each half a second? and interpolate between the difference. Going further you can only send data of cards whose position moved over some threshold, so the bandwidth increases only as chaos increases, use half-precision floats , ensure only X and Z is synced (if you don't move them vertically) etc.

[vivid zodiac]

Is unity netcode for game objects good enough to handle 25-30 player dedicated servers? I am working on a multiplayer game currently using mirror, but there are so little actual tutorials for mirror that i have trouble coding the round itself. While i wanted to check out netcode today and after just 1 actual tutorial i can tell it is way easier than mirror and im maybe planning to switch to unity's netcode istead. However the simplicty of it also made me think if it's strong enough to support that kind of sized servers since from what i know but im not sure it is made for smaller co-op games rather than bigger multiplayers.

[sharp axle]

That will ultimately come down to your server hardware. But you should be able to handle a couple dozen players depending on your game type

[vivid zodiac]

So it depends more on the quality of the dedicated servers themself rather than the networking which i am using?

[sharp axle]

For the most part, yea. Different solution have more built in features than others. But I haven't seen much that you couldn't implement yourself with any given network library

[vivid zodiac]

Alright, thank you very much.

[tame slate]

Mirror and NGO are about as similar as can be, tbh. You shouldn’t find that much difference between them honestly

That being said if you feel more comfortable with NGO, go for it. NGO has a guide on porting Mirror/UNet code to NGO which would make the transition pretty simple.

[vivid zodiac]

Also thank you, the thing is im a beginner to networking and i found mirror a pain in the ass, and like said after one tutorial of NGO i can tell it's way simpler. However when i asked GPT about if it's efficient enough for 20-30 player servers he answered that NGO is made for 4-5 player co-op games rather than bigger one's, so i was a bit worried i may do all the coding for the game and when im finally done and buy the dedicated server it turns out to be extremely laggy et cetera.

[tame slate]

It really depends on what your game entails and how you implement your networking code.

I used an early access version of NGO and Relay 5 years ago and had no problem having games with 15 players connected.

[sharp axle]

You should also always be testing and profiling your game during development.

[tame slate]

Yeah. Definitely don’t wait until the end to see if things are working as you want them to

[sharp axle]

nothing should be a surprise when you go live.

[vivid zodiac]

Alright, thank you guys very much, definitely switching to NGO then. I did manage to achieve some stuff with mirror, but i wasn't able to find any good tutorials for it other than some nonsense talk about things nobody will even ever use so the most of my mirror usage was scripting, getting errors then asking on the mirror server how to resolve those errors and so on for 3 days straight.

[tame slate]

Also be careful using ChatGPT for NGO going forward.. I’ve found it’s knowledge about it is quite outdated.

[vivid zodiac]

I try to limit my ChatGPT usage when programming because sometimes he make stuff more complicated than it actually is so i only ask him questions when i actually cant find a real answer.

[sharp axle]

Yea, You'll want to shell out for Unity Muse if you want up to date AI

[vivid zodiac]

Thanks guys for all the usefull stuff!

[sharp axle]

There is also a Netcode Discord where the Unity devs post occasionally

[vivid zodiac]

Thank you, just joined it.

[sly whale]

How do u make like a game manager for networking ive indtantiated it on my master client so theres only one of it but then i cant get refrence to it on the other clients im using photon btw but yeah how do i refrence it

[viscid vessel]

Anyone know why NetworkTransform doesn't work? I have 2 players in scene whenever when moves around errors get thrown and the movement doesn't get synced.

The error:

NullReferenceException: Object reference not set to an instance of an object

Unity.Netcode.NetworkTransformMessage.Deserialize 
(Unity.Netcode.FastBufferReader reader, Unity.Netcode.NetworkContext& context, System.Int32 receivedMessageVersion) (at NetworkTransformMessage.cs:64)

(Unity.Netcode.FastBufferReader reader, Unity.Netcode.NetworkContext& context, Unity.Netcode.NetworkMessageManager manager) (at 
NetworkMessageManager.cs:575)

[viscid vessel]

Nvm, it looks like there was a weird bug on my own side of the code

[sly whale]

TH.photonView.RPC("PlayerSatDown", RpcTarget.AllBuffered, i);

    public void PlayerSatDown(int i)
    {
        players[i] = PM.gameObject;
        playerSat[i] = true;
    }```

im using this to update these variables to players and i use RpcTarget.AllBuffered to make it so late joining playersget updated but their not and i dont get why

[random vessel]

hey guys, im trying to make a fps game and its my first time using netcode for game objects.
is this how i should handle bullet trails? :

what im saying is that the client that shoots the bullet will tell the server, then the server will tell any connected clients to just spawn a bullet and lerp them from position x to position y, because we dont need the bullet trail on the server.
is this the correct way to do it?

[fathom walrus]

Hello. I am developing multiplayer card game using Unity and Colyseus framework. I've completed basic game logic but after I've integrated multiplayer function, there happens serious errors. when we establish connection, main UI was loaded but I cant see them. I hope the professionals are help it. Looking forward to hearing from you.

[sharp axle]

I wouldn't use lerp for bullet travel. But you can disable the trail renderer on the server if that's an issue.

[viral ether]

well

it does have physics 🤔

[viral ether]

that sounds good, the ticking every x frames or half second

I figured

I'm trying to finish all mechanics, as if it was a single player thing

and then build them in multiplayer, might be double the work, but knowing exactly what I need will help a lot

and there's not a lot anyways

and also maybe, send this project here, or record stuff if I ever need to

[sharp axle]

Yea. I believe all the physics is done locally on each client.

[viral ether]

huh, interesting

[random vessel]

the bullet trail is only visual, thats why im thinking things related to bullet trails can be handled on the client, through a clientRPC

[sharp axle]

that seems like a lot of extra work. And you have to deal with the delay the RPC will have.

[random vessel]

alright then, so how should i synchronize weapon effects like the muzzle flash vfx(srp) point light flash, and the vfx(srp) for the bullet trails?

[sharp axle]

Those don't have to be synchronized since they are local only. You can use an RPC to trigger your shooting animations and effects. or you can use Animation Events and let the Network Animator synchronize things

[spring void]

[Netcode for GameObjects]
I'm trying to serialize an array that contains instances of a particular class with the interface INetworkSerializable. I'm serializing it using the method NetworkSerialize, but the compiler won't let me do that. Here is the NetworkSerialize code:

public void NetworkSerialize<T>(BufferSerializer<T> serializer) where T : IReaderWriter
{
  serializer.SerializeValue(ref directions);
}

What puzzles me: I've already done a similar thing (serializing array of INetworkSerializable) multiple times in the past, but it's the first time the compiler has prevented me from doing so. Any idea why it happened?

[lofty igloo]

Does distributed authority only work for NGO?

[sharp axle]

I didn't think you could serialize arrays that way since they are reference types. NativeArray should work though.

[sharp axle]

At the moment, yes. NGO2.0 only. But since its a service like Unity Relay, I would think it would eventually be usable by anything.

[spring void]

Seems that NativeArray won't accept non-nullable values. I've checked how NativeArray works for a class that has no issues with being serialized in an array, and turns out NativeArray also won't work here. The conclusion is that sometimes .SerializeValue lets me serialize an array of nullable classes, but I've no idea why.

[sharp axle]

Are you using custom serialization for your class? I only ever use structs with INetworkSerializable

[spring void]

I'm using only INetworkSerializable so far. It worked for other classes. The not-working example looks more or less like this:

[Serializable]
public class Direction : INetworkSerializable
{
  public GridMode gridMode; // enum
  public int direction;

  public void NetworkSerialize<T>(BufferSerializer<T> serializer) where T : IReaderWriter
  {
    serializer.SerializeValue(ref gridMode);
    serializer.SerializeValue(ref direction);
  }
}

@sharp axle
Oh, I've just figured it out. My Direction class had a constructor that has some parameters, which implied that this class had no parameterless constructors. After adding a parameterless constructor everything works fine again. 👍

[sharp axle]

I was about to say there is no reason that code wouldn't work

[muted ginkgo]

Does any one have experience using netcode connected over the local host to do stuff in multiple unity windows for some sort of weird functionality? I'm surious as to how y'all handled it and what the use case was

[sharp axle]

You're gonna have to be more specific.

[muted ginkgo]

Oh, I'm trying to do a hacky sorta work around to run two unity windows by having one be the client and one be the host. I'm doing it so that one window can be streamed live and the other window can have behind the scenes stuff going on that doesn't get streamed and I figured that'd be the easy-ish way to do it with out having to resort to 3rd party solutions or breaking my brain, lol

I've worked with photon, but I don't want to have to pay to liscense it and deal with setting up the systems for actually connecting through a network, y'know?

I want to be able to control what the viewer sees in window one while I work in window 2 with the actual UI. I want to hide what I'm doing

[muted ginkgo]

make sense?

The window that is streamed isn't supposed to be interactive in any way

[spring crane]

Is https://docs.unity3d.com/Manual/MultiDisplay.html an option?
Other than that, some IPC solution or any UDP transport should do the trick.

[sharp axle]

Why not stream the window in discord?

[muted ginkgo]

Oh, I thought that only worked for one window accross multpple monitors? I'll try it!

[muted ginkgo]

Because I don't want to see secret information as we interact accross discord. I'm making a virtual table top

[spring crane]

I'm personally not very familiar with its capabilities, but it's worth checking out

[muted ginkgo]

I did very briefly, but I might have misunderstood

Right now, I was thinking to just run server, host, and client on the sae machine, lol

[sharp axle]

If this is all on the same machine then yes, Multi display is what you should use

[muted ginkgo]

Just for reference, I only have one monitor. Just want to make sure you understand the question

[sharp axle]

If you are streaming to a different PC then I would use WebRTC
https://docs.unity3d.com/Packages/com.unity.webrtc@3.0/manual/index.html

[muted ginkgo]

I mean, it's not that deep. I just want to be able to manipulate UI elements in one window, that I stream over discord, while I click on stuff on my window. The important part is just them being able to see text and pictures I pull up with out seeing the menu that I use to pull them up. I don't need a super robust solution. Just an easy one

God.... the documentation for this suuuuucks

Interesting! I'll look into that. I don't think using Display is going to work, because the constructor isn't public and the array of displays is automatically populated by Unity

[spring crane]

You technically could hack the individual windows to do what you want by getting the window handle and doing what you want through OS API.
But please just anything other than IPC over Windows Registry 😄

[muted ginkgo]

Haha! I have no idea how to do that. Is there a particular reason I wouldn't want to use the netcode package? Also, I'm not the smartest, but what does the windows registry have to do with ICP?

[spring crane]

PlayerPrefs on WIndows are stored in Windows Registry

[muted ginkgo]

OH!

Yeah, I was gonna do one or the other

Not both, lol

[spring crane]

Netcode is fine, especially if you do want to sync scene and objects instead of just plain data

[muted ginkgo]

Yeah, I just want to be able to visualize die rolls on both screens while hiding the interface on the one that actually selects from the random tables for the players, so I can GM on discord

I want a bespoke solution for a TTRPG thing I'm doing

[spring crane]

If you don't actually need any of the "gameplay networking" features and just want to send plain network messages between clients, transport like Unity Transport used by Netcode is a bit cleaner solution.

[muted ginkgo]

Yeah? I'm not entirely sure what all of my features would be, so there is a chance that I might be syncing some game objects, like map markers and stuff, but I wouldn't really need to. I've only really used photon for one project at that, and am just sorta getting into netcode

[spring crane]

Netcode is probably the safe and easiest option then.

[muted ginkgo]

Valid

[shy idol]

Help needed

I am building a dedicated server
Problem: How can I remove unnecessary scripts, components and game objects from the scene in the build (the server does not need visual effects, decorations, cameras, etc.)
Or should I just create another scene for the server and sync it somehow

[sharp axle]

The dedicated server package can help you strip out unneeded assets
https://docs.unity3d.com/Packages/com.unity.dedicated-server@1.3/manual/index.html

[shy idol]

Isn't this for the new version of unity? I'm using Unity 2022

[sharp axle]

These are also steps you can take on older versions
https://docs-multiplayer.unity3d.com/tools/current/porting-to-dgs/optimizing-server-builds/

[shy idol]

Thanks, that will help me a lot

[jagged plinth]

This repository does not contain a valid Unity project. Unity projects must contain a valid Unity version file in the path "ProjectSettings/ProjectVersion.txt".

To include it in your local workspace, follow the next steps.

Can someone help me with this?

[viral ether]

so I am pretty much done with the basic mechanics of the game

sitll need to do the camera but, that can be done later

now, how is it that I would store the cards position and state (if activated, and flipped)

👀 for multiplayer, like you guys said

when suggesting not to use ClientNetworkTransform on all of my cards xD

[tame slate]

NetworkVariable probably is sufficient for all three of those things

[viral ether]

on each card?

I have 100 cards that are instantiated when the game starts

... I really don't have an idea of how I would do this... :/ I kinda need examples and such, if possible

[tame slate]

I remember someone else saying that may be too many NetworkObjects, but you'd have to test.

Your other better option would probably be a NetworkList that keeps track of all the cards data.

[viral ether]

oh, network list

[sharp axle]

Do you really have to instantiate all 100 cards? But you only need one network behavior on your card prefab

[viral ether]

oh, I can have a network behaviour on each card

just not client network transform 👀 ?

call my own OnCardMove(){Move for the other player too}

[sharp axle]

It's not the best way to do it. But it should work

[tame slate]

Yeah, I would avoid instantiating if possible. My most recent project with Mirror had 75 NetworkObjects each with a NetworkBehaviour that had a NetworkVariable to keep track of its state. But they were based off of a prefab and placed in-scene.

[viral ether]

I'm looking for a way that's not too bad, but that doesn't take time to make either

this is how I have it

the ownerID is not actually set yet xd

I guess I could put 100 cards in the scene, so I don't have to instantiate them

so make each card a network behaviour

[viral ether]

to set the parent of a network object, does the parent also have to be a network behaviour?

From DeckHandler.cs, which is not a NetworkBehaviour

I assume also I should use, "Distributed Authority"

I see

kinda frustrating but... I guess I will have to break each thing down little by little until I get it

[sharp axle]

Network Object parenting has rules and can get rather complicated

[sharp axle]

Distributed authority is a whole other thing. I don't think you'll need it unless you are planning a full tabletop simulator type physics playground

[viral ether]

oof

[viral ether]

well

I would prepare a word document of how I would like everything to work and send it here

so people can visualize better how to assist me

but idk XD I feel like it's too much

[viral ether]

well

[viral ether]

I wouldn't know why I would need it, or why I wouldn't use it

[sharp axle]

Very basically, it shares the server processing load between all the clients. But since there is no central server authority, cheating can become an issue

[viral ether]

oh I don't mind cheating really but

[weak plinth]

el bien hablas español?

[viral ether]

just so I don't have to do things twice I'll keep it like that

[viral ether]

only with female

[weak plinth]

im female

[viral ether]

then, si

[weak plinth]

haces juegos tu?

le sabes a eso?

[viral ether]

no

[weak plinth]

vrga

[viral ether]

unless tengas plata

if so, then yes I do make games

[weak plinth]

si tengo

i just need solve a problem

[viral ether]

oh

[weak plinth]

its for my school proyect

i need it for tmrw

[viral ether]

well spit it out, make sure in the correct channel xd

[weak plinth]

i can pay u like 5 or 10 bucks for paypal

[viral ether]

nah u good

what do you need help with

[weak plinth]

on which channel then? haha

[weak plinth]

can u check dm

ill send video

[viral ether]

sure

[viral ether]

fair enough

well, let's start with

what things I should have checked here

(I want to change my card's parent every so often)

[tame slate]

!collab - stop spamming this across different channels

[raw storm]

:loudspeaker: Collaborating and Job Posting

We do not accept job or collab posts on Discord.
Please, use Discussions to promote yourself as job-seeking, advertise commercial job offers, or look for non-commercial projects to participate in:
• Collaboration & Jobs

[hushed coyote]

anyone know why collider callbacks wouldn't work on an object with a ClientDrivenNetworkTransform, CharacterController, and a CapsuleCollider? (this is on the server)

[hushed coyote]

I put a Rigidbody on the object is should fire collision events for but it only fires the events when IsKinematic is false yet NetworkRigidbody forces it to be kinematic

[sharp axle]

That is correct. Collisions will only fire for the server
https://docs-multiplayer.unity3d.com/netcode/current/advanced-topics/physics/

[cloud vapor]

guys for the life of me I cannot figure out why my player cannot move in the server, I am using unity multiplay hosting and matchmaker, and when I join, I just cannot move at all, here is my code https://paste.ofcode.org/35igiV98aV6KihbAQhnVnBm

[sharp axle]

You need to disable the character control the remote players. A network transform can handle syncing the positions. Check out this sample for working with Cinemachine and the 3rd person character controller
https://github.com/Unity-Technologies/com.unity.multiplayer.samples.bitesize/tree/main/Basic/ClientDriven

[indigo parrot]

Hey guys, anyone had trouble with Netowrk lightning?
I have a map wiht realtime lightning that works nice! the problem is when i use my networked player (Wich has a flashlight that you can activate via script), realized when i use any kind of script to activate or deactivate lights will make the other realtime lights, go crazy, they dissapear at certain angles (Its not forward lightning problem, i use deferred 100%)

I use FIshnet 3.11.18

[blissful jay]

your question/issue has nothing to do with networking

[indigo parrot]

So where should it go on the discord?

[blissful jay]

https://discord.com/channels/489222168727519232/497873729578336276

or the server for the framework you are using

[indigo parrot]

This is only for networking via Unity?

[blissful jay]

no, but mostly yes, there is a whole server for the framework you are using, so why not use that

[indigo parrot]

Got no answers there, already asked

[lilac forge]

hello Im making a party game and I wanted to use unity netcode but I have an issue right now. I made a basic server sided movement however I think latency is so high for client. How can I fix that? Theres massive difference between playing from host and client right now and it makes it kinda unfair. My example game is 4 player pong

[sharp axle]

You can either use Client anticipation or the new Distributed authority if you are using Unity 6

[slim tendon]

Hello,
I am using Lobby and Relay.
I have built a chat when all the players of the lobby have loaded a new multiplayer scene and are connected with Relay.
But before that, I don't find how to build a chat for the lobby room (where the players wait before to load the game scene). Any concept to share? 🙂

[tame slate]

I would say Lobby isn’t perfectly built for a chat system to be implemented but it’s definitely possible

At a pretty basic level you could just make some custom player data called “chatMessage” and instantiate some text that equals what chatMessage was set to

Using Lobby Events to ensure this happens every time a player updates their chatMessage Data

[slim tendon]

Oh, I see. Thanks.

[sharp axle]

If you are using Unity 6, vivox is super simple to set up with the Multiplayer Services SDK and Widgets package.

[stray thunder]

My player is keep getting out of sync 😦

[stray thunder]

https://discussions.unity.com/t/network-config-mismatch-error-while-config-is-the-same/843536/15 this fixed the issue

[lofty igloo]

I have a pretty involved question about server rewind in regards to melee combat. I really don't even know how to format the question in a way I would get an answer.

TLDR: What would be the proper method to check for hits when the mesh is being interpolated but the actual server side hit boxes aren't?

The reason this is confusing to me is because the visual mesh that the client hits is in the past. Then add on top that its being interpolated from an even older position to its current one. Meaning when I request a hit validation from the server and I pass the frame the hit occurred on, there's a high chance I wouldn't get a hit confirmation. As I type this I realize I would need to calculate the offset caused by the interpolation as well as use the server's current frame instead of the clients frame. Even then this is all a jumbled mess in my mind lol.

[slim tendon]

No, I am not using Unity 6, my project being several years old already.

[slim tendon]

This seems to work fine, not tested in multi yet though.
Well there is a little more than one second delay to display the message, but I think that it remains okay.
Thanks.

[sharp axle]

Be careful with this. Lobby has bandwidth limits with regards to how much data you can send
Even on older versions I still say that Vivox is the way to go.

[sharp axle]

The server should not be rewinding. It is the source of Truth for the simulation. The client should not be rolling back in the middle of attack animations, your client prediction should be locked in unless you have some kind of animation canceling happening

[dry maple]

Yes, the idea is to recreate the exact view that the client had at the time of doing the hit, in the server, and taking into account things like interpolation.

Usually this is done by appending each input from the client with the two ticks (snapshots) used for interpolation and the alpha between them.

It's pretty simple to implement if you have a proper tick-based networking solution, with a clear replication strategy where you can be sure that by simply using a single number (tick), you can know exactly in the server what the client had.

However, the real problem is performance. As resetting individual transforms is very slow. However, for games with small scales and low player counts (less than 16), it's fine.

[tame slate]

Lobby’s free tier covers up to 10 GiB. Sending chat messages this way you’d be looking at barely a KiB per message. You’d have to route millions of chat messages through Lobby to even get close to going above the Free Tier.

As long as he has a cooldown for sending messages to avoid Rate Limits, this method is more than sufficient for a pregame chat system.

[dapper zinc]

i can't write to a network variable in distributed authority?

[sharp axle]

They have to be set to Owner Write Permissions

[vagrant glade]

What's the best way to host a P2P multiplayer solution yourself?
Are Unity mutiplayer services advantageous in the long run ? Or i need to use an another alternative ?

I'm planning to create a multiplayer game. The games will be hosted on the host PC, with 6 to 12 players per game.

[sharp axle]

Any relay service will work for that. Unity Relay, Steam P2P, or even Epic Online Services can work

[vagrant glade]

But what about pricing ? What is best solution for an indie game developer ?

[sharp axle]

Only you can make that call. Unity Relay has a free tier that you will be unlikely to go beyond as an indie. Steam and EOS are both free but tie you to their services. Photon Cloud is also an option with a similar free tier to Unity.

[vagrant glade]

Thanks for your answers! I'll take a closer look 🙂

[raw crag]

Hey ya'll! I am having an issue in Unity 6 LTS (6000.0.23) that happens with all to me available netcode for gameobjects versions (1.10-2.0).

I have set up a minimal example already in a new project with only the essentials and only three scripts.

The first script is unimportant as it just calls the StartServer/StartClient methods on the NetworkManager, as well as using it's SceneManager to change scenes

The second script just contains a NetworkObject prefab, that it spawns for every connected and connecting client, to which it also gives ownership to. This logic runs inside the OnNetworkSpawn method, meaning that netcode should have run everything it needs beforehand.

The third one is also tested to be unimportant to the case, as it just changes the color of the SpriteRenderer depending on it's owner id.

I have created and registered two prefabs for both the player and player spawner scripts, and I have no trouble connecting via the MPPM package. Only when I change scenes to another one that also has the player spawner script, it throws "Invalid Destroy"-errors for the client on every network object. The weird part is that the scene with it's objects is visible for a single frame. I """fixed""" this issue by delaying the spawning of connected players by one frame, but this just doesn't seem right. Can someone please help me figure out if this is an issue with my setup or a bug in netcode?

TL;DR: I'm encountering an issue where when spawning objects directly after a scene change, the clients get "Invalid Destroy" errors, which does not happen for the host.

The first video (green editor) shows me not delaying one frame and the second one (gray editor) does

This is the script responsible for spawning, if you want to take a look at it

[raw crag]

I've done some more experimenting with a heavier second scene and it seems to always work when I put off spawning by one frame using Invoke with a delay of 0 or waiting for the OnLoad(Event)Completed events

even with more clients

[late loom]

Hey,

I tried the VR Multiplayer Template, and it worked for me on Editor+Desktop.

Then I tried to change Transport and Relay settings to websockets. (secure=true in Relay) and use websockets both on Relay and Transport.

But once I set secure to true on Relay(needs that later for SSL connection), and/or switch to use websockets, it fails to connect.
In some cases I get an error that "player is already a member of the lobby", on others I get "join code not found".

Any idea or tips on how to make the VR Multiplayer Template to support websockets? Maybe I'm missing some settings? Couldn't figure it out from the docs.
(I want to run it on web. There are other changes I need to make, but no issues with them)

I'm using Unity 6000.0.23 and downloaded the template for it.

Thanks

[sharp axle]

You need to also make sure you set the Relay server data to use wss
https://docs.unity.com/ugs/en-us/manual/relay/manual/relay-and-ngo#Note_about_WebGL_support

[late loom]

Yes, done that as part of the iswebsocket in the RelayServerData. The API is a bit different than the docs.

public RelayServerData(string host, ushort port, byte[] allocationId, byte[] connectionData, byte[] hostConnectionData, byte[] key, bool isSecure, bool isWebSocket)

I set both isSecure and isWebSocket to true.

But if even one of them is true, it seems like the Relay/Lobby/Transport fail.
Can't figure what fails.

[opal dust]

Does anyone know where I can find up-to-date documentation for using Unity's authentication service to authenticate with Oculus? I've done a lot of googling but the only resources I can find uses the deprecated Oculus Integration package. I'd also still like to be able to authenticate with an Oculus account when running the project in the editor (and I have no headset connected).

[gray pond]

MIRROR 93.0.0 IS LIVE ON THE ASSET STORE Download | ChangeLog

[sharp axle]

Does this no longer work?
https://docs.unity.com/ugs/en-us/manual/authentication/manual/platform-signin-oculus

[opal dust]

This is the documentation I was taking a look at that uses the deprecated Oculus Integration package

[sharp axle]

Have you tried it with the latest Meta XR Core plugin? The namespaces might change but I would assume it's still a similar process.

[patent bronze]

hi, Im triying to make a game as a host but im having a problem

my host does not start(in editor at least)

this is the code, I am following this tutorial from codemonkey

https://youtu.be/7glCsF9fv3s?si=SFtd3oBwms-bo7en

[sharp axle]

Are you seeing any errors in the console? Make sure your AllocateRelay() is calling RelayService.Instance.CreateAllocationAsync(maxConnections)

[patent bronze]

no, no errors at all

it just stops compiling

ill send you a picture

[patent bronze]

and yes, i am doing this

now i am getting another error before that one

before initializing host

[cloud vapor]

Hmm I tried adjusting my code and stuff and its still not really working, can you maybe help me out some more

[sharp axle]

CreateAllocationAsync() needs to be in a try catch block too in order to see any exceptions that might get thrown

[sharp axle]

You'll need to simplify things in order to see where it's breaking. First try moving a simple cube then move up from there

[cloud vapor]

ill try more

[patent bronze]

yes

it is

[cloud vapor]

I tried and the movement is being detected but its just not moving

[waxen quest]

Hello, can anyone tell me the correct way to handle this. I have used NetworkList before but its first time i am using it like this.

This giving me Null RReference error

I add value to this list in OnNetworkSpawn and in Server

    [SerializeField] private Team[] teams;

    [Serializable]
    public class Team
    {
        public string teamName;
        public Color teamColor;
        public SpawnRange teamSpawnRange;
        public NetworkList<ulong> teamMembersList;
    }

    private void Awake()
    {
        for (int i = 0; i < teams.Length; i++)
        {
            teams[i].teamMembersList = new NetworkList<ulong>();
        }
    }

I initialized it in Awake also

I also tried to do it in Constructor but same error

[tame slate]

I would probably avoid putting a NetworkList inside of a class like that

I'm not sure that's supported

[waxen quest]

I guess you are right

[sharp axle]

Server Player movement

[sharp axle]

Actually I think as long as the parent class is a network behavior, it should still work. You just need to initialize the teams array.
I still wouldn't do it that way. Make Team a struct that implements inetworkserializable. And member list a Native Array/List

[viral ether]

hey people

I need some help here 😦

right now, I am passing in the player name and leaderID

in the information that I need for the actual game

which is nicely working

now, I have a List<int> of each player's deck, which contains the ID for 50 cards
should I make it a network variable so I can pass it in from the LobbyRoom scene to my Game scene?

[vagrant glade]

I want to create a small game that handle 8 - 12 players, anyone can tell me what the best multiplayer solution between Client Hosted and Distributed Authority ?

[viral ether]

hey bubbies, could you give more details about your game?

chatgpt says this

[vagrant glade]

Hey, the same kind of game like Lethal Company and Lockdown protocol

But cheating is always possible even Distrtibuted Authority right ?

[viral ether]

yes

1 out of 4 men cheat
1 out of 5 women cheat

according to studies

[vagrant glade]

In both cases, I understand that both options are chargeable on the Unity side ?

If i use the multiplayer Relay or Distributed Authority

And i think its the same if i use Steam P2P with a bandwidth usage ?

[viral ether]

let's wait for someone more savvy to come and answer that, don't wanna give u wrong information

[viral ether]

don't forget about me too plz xD

I'm all the way up there

[vagrant glade]

Network variable should be a better use case for syncing your deck cards i think, but i dont know if you can share a networked variable value between multiples scenes 🤷

I think PlayerPrefs class is to share values between scene if i remember correctly

[viral ether]

oof, I could make this object a Don'tDestroyOnLoad type thing

which will be fine

I will probably make a script just for that, to act as a bridge for the players information

and destroy it when it does it's job

[vagrant glade]

You can do it like this too yeah 😄

[viral ether]

there's so much Idk how to do tho 😒 xD

[oak flower]

@viral ether Don't post ChatGPT answers here and there's no off-topic either.

[vagrant glade]

I dont understand this 🤔
0.16$ for each player playing multiplayer on my game / month ?
Or 0.16$ for each player playing ~43000 minutes in multiplayer / month ?

[tame slate]

average CCU. Not just each player that plays the game ever.

Meaning you remain within the free tier if your game averages 50 or less players connected concurrently throughout the month.

If you start averaging 51 concurrent players, that's 16 cents and so on for each additional average CCU.

[vagrant glade]

Did you know what is the best solution about pricing between using Unity services or Steam P2P ? (Im using a game hosted solution)

[tame slate]

No idea, really. Although, I've never really heard anyone say one is drastically a better deal than another. But I'm sure the pricing for each solution is public, so should be easy to compare.

What I can say is that Unity's free tiers are pretty generous, I don't know many people that go beyond them.

[sharp axle]

Distributed Authority free tier is a bit lower than Relay

[vagrant glade]

Distributed is like each client own its game objects or something like that ?

[sharp axle]

https://docs-multiplayer.unity3d.com/netcode/current/terms-concepts/distributed-authority/

[waxen quest]

Yeah that can be the reason

I will try the solution

[tacit edge]

On NGO i have a Network object, With a net transform & net RB using interpolate, the movement of this object is all controlled by the server. I need the client to be able to follow these objects without jitter. I'm currently using a simple cube for testing with the most simple transform matching script below however its clearly stuttering while following the physical objects controlled by the server Why is this? (The video is from a clients perspective, the cube is being controlled solely by the client, with only the position script below and a mesh renderer)

void Update()
{
            transform.position = SteeringWheel.transform.position
}

Im soo confused surely the cube should move more smoothly than the Network Transforms? As this is the clients perspective and the cube is controlled by the client, yet somehow the boat objects are moving more smooth

[sharp axle]

That stuttering is fighting between the physics and the local transform. I believe physics update in FixedUpdate() then you are resetting the position in Update()

[tacit edge]

This doesnt make sense, the wooden boat is more smooth in fixed update, when compared to the transform position setting of the cube in the Update()

This issue does not occur in local play

[tame slate]

Player and example cube are controlled clientside?

[tacit edge]

Yes they are controlled clientside, It seems that the transform position of the Network Transform objects is jittery, despite the movement of the objects being smooth due to interpolation, it doesnt make any sense, as surely what im seeing is smooth objects, so in theory i should be able to smoothly follow these objects

[tame slate]

If you have a client-side object trying to follow a server-side controlled object, you have two sources of interpolation from different places. Naturally, they'll struggle to sync up and fight with each other.

That would be my guess.

Also as said above, FixedUpdate with an RB for the boat and just Update for the player introduces another potential layer of fighting.

[sharp axle]

You can fire up the debugger and step through that code one frame at a time to see exactly where the transform is stuttering

[tacit edge]

No interpolation for the cube, the cube is below, nothing to interfere with the movement

Notice the Green WireSphere is at the correct position, yet the cube isnt

How can this be possible if both functions use the exact same position?

[tawny rapids]

I'm encountering a substantial delay when using the Unity 6 (6000.0.23f1) Distributed Authority sample (setup via the the Multiplayer Center). Between clicking "connect" on the sample UI and actually getting the default cube player prefab spawned it's over 10 seconds with a lot of time seemingly on QOS checks as shown here.

Is this expected when using Unity Services or is there a way to eliminate all the wasted time?

[sharp axle]

You can check the profiler to see what taking up the time but it's not the Qos calls. Those took less than half a second

[alpine pulsar]

hey, i've got the NGO stuff working but all of a sudden the network managers started shutting down when a remote client connects and the console doesn't say what's caused it, is there anything I can enable or add somewhere to find out what's causing it?

[violet rune]

Hello! I'm new to networking, and I have this homework where i have to find a pre-made prefab game and attach multiplayer to it. I chose this Advanced FPS Horror Kit prefab, and I chose Mirror as the networking plugin. However I started watching the tutorials for it and immediately became confused. This is the player prefab from the Horror kit, it's got plenty of nested gameObjects. The parent in the prefab does have the network identity component, but its children dont see it for some reason. And as far as I understand, all of the scripts need to inherit from NetworkBehavior, because they do stuff like shooting guns and picking up objects. What am I doing wrong here?

[alpine pulsar]

looks like it was approval request taking forever, rebooting editor fixed

[sharp axle]

Who in their right mind would give out homework like that? You can't just attach multiplayer to an asset like that.

[alpine pulsar]

things are never as simple as "just add multiplayer", you need to build in tandem

[violet rune]

I dunno, my mobile gamedev teacher

It's a semester project, we need to find a prefab game, choose a networking plugin and make multiplayer with the prefab, then attach a bunch of statistics services and show that it all works

[alpine pulsar]

ok so this issue is back again, seems like rebooting editor is just temp fix, anyone come across this before? i'm on MacOS so not sure if this is Mac specific thing

[sharp axle]

does it still happen when you turn off connection approval?

[subtle inlet]

Heey, iam trying to switch a scene through NetworkSceneManager.Loadscene.

But the scene only switches for the host, not for the client. I tried it in all sorts of ways(ServerRpc, clienRpc) but the documentation states that the NetworkScenemanager automaticly syncs scenes if you change the scene after a client is connected. Anyone any idea?

[sharp axle]

Make sure you have scene Management enabled in the network manager

[subtle inlet]

Yes done!:)

[subtle inlet]

Still only loads the scene for the host

[sharp axle]

Are you seeing any errors on the clients? Also make sure the scene is in the build list

[subtle inlet]

No errors seem to be happening, and the scene is setup in the build profile

In one way there was an error that SceneLoad should not be called from the client, but i fixed that with the server Rpc

And IsHost

[sharp axle]

Yea, only the host can call SceneLoad(). But it should definitely sync to all connected clients.

[subtle inlet]

I hate my life, thanks anyway! Ill keep on digging:)

[amber spire]

Can someone please review my websocket connection wrappers? Are there possibilities for race conditions/concurrency issues? Currently there are no issues found
https://gitlab.com/qiwik0805/clicker-game/-/blob/dev/MI-4/Assets/Scripts/Runtime/Services/WS/WebSocketConnectionService.cs?ref_type=heads
https://gitlab.com/qiwik0805/clicker-game/-/blob/dev/MI-4/Assets/Scripts/Runtime/Services/WS/WebSocketConnectionManager.cs?ref_type=heads

[alpine pulsar]

hi, sorry for late reply, yes this happens with it disabled, it was disabled by default on my project too

this is all i see in the logs

i've got my logs set to developer, tried both disabled/enabled client approval and it still happens, sometimes it works fine for a few tests and then all of a sudden stops, and sometimes just doesn't work off the bat

[sharp axle]

Are you using a VPN?

[alpine pulsar]

nope, if it helps in any way I'm using the multiplayer client feature in Unity 6

[sharp axle]

Do you mean Multiplayer Play Mode?

[alpine pulsar]

that's the one 🙂

[sharp axle]

Try making a build and see if the same thing happens. The only issue with mppm that I'm aware of is when the clone windows don't open if the os language is not in English.

[alpine pulsar]

will give that a go shortly

[normal peak]

Is there a free simple proximity chat asset or tutorial

[eternal sequoia]

So i have a problem with my project: Basically when i spawn ONLY the host no warnings appears in the console, but when i try to spawn another player, it gives me continues warning about the rigidbody being kinematic (which it isn't in both rigidbodys), here my script for movement, for reference: https://paste.ofcode.org/pM6H2nvu8P9gzTxERxPhy5

[sharp axle]

Vivox is free up to 5000 monthly users

[normal peak]

how can i implement spatial sound

[sharp axle]

The docs are a bit of a mess but you can call JoinPositionalChannelAync()
https://docs.unity.com/ugs/en-us/manual/vivox-unity/manual/Unity/developer-guide/channels/positional-channels

[normal peak]

thanks will look into it

[halcyon moat]

Hey I don’t know where I should ask this: I having problem with vivox when mute then unmute later, my app will be crashed due to resource usage (iOS)

Immediately when unmute

[fluid lintel]

Hey everyone! I'm starting a multiplayer project and everything seems to working except when I spawn in a client, they aren't able to move. It just jitters. Any ideas?

EDIT: I'm using Unity 6 and Netcode for GameObjects

[shy igloo]

hey y'all, quickj question. Is the recommended pattern to write your own sessionmanager logic or to use the baked in unity multiplayer widgets? I found the multiplayer widgets to be pretty inflexible, so I figured they were just there as informational, but i'm not seeing a massive amount of documentation around writing your own solution, anyone ahve thoughts?
edit: unity 6 and netcode for gameobjects

[sharp axle]

Yea the widgets are locked in at the moment. I talked with some of the devs over on the Netcode server and they said that they are looking into making them more extensible.
But no need to write your own session manager. You can hook into most of the events that widgets themselves do.

[shy igloo]

oh thanks for the response, yeah i've been banging my head against the wall cause i thought they were all packaged up together, but you're totally right

[shy igloo]

ah darn i remember why i didn't do it this way, all of the unity session stuff is stuck behind internal classes ><

[sharp axle]

Oh yea, you are not going to be able to make your own widgets at the moment. But there are public Session manager events you can hook into

[shy igloo]

oh, there are two classes literally called sessionmanager, one in the multiplayerwidgets and one in the multiplayerservices, and one is hyper internal and inaccessible and the other is totally public

thanks for the help @sharp axle

[heady vault]

with unity netcode, and animations, would it be better to :

#1 Just fire the animation on the host system that moves a gameobject, and then have the animator component disabled on the other systems, and have them follow the host movement via network transforms?

or #2 run the animation on all systems at the exact same time with rpc methods?

[sharp axle]

The network animator handles syncing for you
https://docs-multiplayer.unity3d.com/netcode/current/components/networkanimator/

[heady vault]

oh, COOL! thanks, not sure why I didn't come across that.

[eager cedar]

Who knows what engine to use if I want to develop a game with rooms (in each 10 people) and there can be more than 100+ such rooms. That's very similar to Dead By Daylight, Amoung Us etc

For instance as I know photon PUN 2 isn't for MMO games but my game isn't so I wonder if it can provide what I want

Does PUN 2 has client auth not server?

Oh

Maybe netcode will be a better choice for that

[stiff ridge]

Will you target mobile or WebGL?

For the games you describe, most solution will do fine, even PUN.
I'd recommend Fusion Shared Mode. It distributes the authority on all clients but is easy to work with and still gets great results.

Netcode's distributed authority is not yet final and relies on UGS services.

[eager cedar]

3D PC online game
I'm looking for a solution which provide:

1. Server auth or shared mode (good sync and prevent hacking);
2. Opportunity to host rooms (100+) with 10 players in each of them;
3. Voice chat

[stiff ridge]

Server auth or shared mode are quite different from one another so it makes sense to figure this out early on.
Shared mode is typically easier to do but not as precise as everyone runs a part of the simulation.
Fusion can do either. There will be Server Side plugins for Fusion Shared Mode at some point but that is not ready yet.

Running many of such sessions is not a problem with any solution and Voice can also be added to existing networking solutions in many ways.

This might be a starting point:
https://doc.photonengine.com/fusion/current/game-samples/fusion-impostor
It is in Host Mode however (so: Server Authority, Input sent to Host and State back, less prone to cheating).
This covers your target genre perfectly.

[azure solstice]

I am using Relay + Lobby for my multiplayer and connecting for the first time works no problem. I queue up, get into a game and can play. Then when I attempt to search a second time, it just says, connected to client and it's just me in the game. I assume I'm not disposing of something - I already checked GetJoinedLobbies and nothing is pulling up there. What am I missing?

I call this upon clicking the button to leave the game

public async void LeaveLobbies()
{
    try
    {
        NetworkManager.Singleton.Shutdown();
        Debug.Log("Leaving lobbies");
        var lobbyIds = await LobbyService.Instance.GetJoinedLobbiesAsync();
        foreach(var lobbyId in lobbyIds)
        {
            string playerId = AuthenticationService.Instance.PlayerId;
            Debug.Log($"Removing player {playerId} from lobby {lobbyId}");
            await LobbyService.Instance.RemovePlayerAsync("lobbyId", playerId);
        }
    }
    catch (LobbyServiceException e)
    {
            Debug.Log(e);
    }
}

[normal peak]

Is there a tutorial or documentation for a NGO inventory system

[sharp axle]

That would definitely remove you from all lobbies

[azure solstice]

When I click to start a new game, it puts me into a game with no one else. What would be causing me to still be connected to something?

[sharp axle]

There are loads of different ways of doing inventory. Most are not NGO specific. You can use a cloud service like Unity Economy or Cloud Save. LootLocker is another service.

[sharp axle]

depends on how your new game is setup to start

[azure solstice]

Too much for the text limit - but it's calling this and opening an empty room on the second attempt.

Is it because the Lobby has a non-unique name? "Useless Lobby Name"?

[sharp axle]

You would get an error message if the lobby still existed. That code will create a new empty lobby

[azure solstice]

Right, and it does, but for this one, it doesn't wait for a second player, it just creates it and goes.

[sharp axle]

that is what its supposed to

[azure solstice]

But on the first one, it doesn't go until a second player has joined.

And I can close the app and every single time I try to do it the first time it works perfectly, but if I try to start a second game ever, this happens.

[sharp axle]

weird. none of the code you posted waits for a second player. No idea why it would.

[azure solstice]

That's a good point. I must be handling that elsewhere. I'll check real quick.

[azure solstice]

Oh yeah, towards the bottom:

NetworkManager.Singleton.StartHost();
NetworkManager.Singleton.OnClientConnectedCallback += ClientConnected;

Then when the second player connects:

private void ClientConnected(ulong clientId)
{
    Debug.Log("Client connected!");
    NetworkManager.Singleton.SceneManager.LoadScene("GameScene", LoadSceneMode.Single);
}

[sharp axle]

make sure you are unsubscribing from OnClientConnectedCallback that would be causing your issue

[azure solstice]

Should I unsubscribe as soon as I hit ClientConnected? Like do this after the debug statement?

NetworkManager.Singleton.OnClientConnectedCallback -= ClientConnected;

How exactly does it cause the issue? Not arguing, just curious.

[livid dawn]

I have a question on what's best for me and for my project:

I want to create a casual and social single player and multiplayer, where people just login to chill, talk and interact with the environment. I'm developing a world for the fans (likely no more than like 5 people lol) of a cartoon I'm working on where the world is like a gallery/mock gift shop (no real life purchase) of the cartoon where fans could get on, either offline or online to hangout with other fans.

I'm using the Multiplayer Center in Unity 6 to see the recommended specs. Is "Async, Idle, Hyper Casual, Puzzle" best for me? Also what is the recommended Hosting Model? I'm sort of new to multiplayer for the exception of trying Photon Fusion but all of it was confusing for me and never got to finish due to my lack of understanding.

Please and thank you

[sharp axle]

If you are still subbed to it then the host client connection will trigger it

[sharp axle]

It more depends on your budget really. Having a dedicated server running 24/7 can get expensive. Player hosted lobbies with a Relay service would be cheaper but limits your player counts per game session.

[livid dawn]

Thank you, I appreciate it. Will I be able to change it from p2p to lobby and vice versa once I already start?

The hosting model has Cloud Code recommended but I don't know if that aligns with what I'm trying to do.

[sharp axle]

Yea. its not too hard to port between relay hosted and dedicated servers.

[sharp axle]

Cloud Code would be more for asynchronous multiplayer. Think mobile games like clash of clans or words with friends

[livid dawn]

Thank you! This helped a lot!

[quasi meadow]

Using Vivox on the Quest, whenever I try to record a video, I can't hear the other players in the recording, anyone know why this could be happening?

[sharp axle]

I'm not too familiar with Vivox but sounds like you need to use an Audio Tap to pipe it through the mixer
https://docs.unity.com/ugs/en-us/manual/vivox-unity/manual/Unity/developer-guide/audio-taps/use-audio-taps

[quasi meadow]

Alright I'll try that out, thank you!

[vagrant lichen]

So my client server has been experiencing framerate freezes when certain server RPCs are being handled, and I was wondering how realistic/feasible it would be with the dedicated server package to have the game's host instead launch (from within the game) a dedicated server and connect as a client instead

for a bit more background info on one of the problematic RPCs: it requests from the server to decide what action each npc will take after the player has taken theirs, sending back to that client only the id of the action and an array of targets. the freezing is caused due to the complexity how the choice is made, and already includes coroutines to minimize the impact

[sharp axle]

You should probably fix the function instead. Something is really wrong if your coroutines are freezing up

[vagrant lichen]

the coroutines are not freezing, its justdifficult and messy figuring out everywhere i would need to yield and am looking for an alternative to making it burst compatible. not saying there arent ways to improve the process, but it is inherently a time consuming one

[dapper fox]

How do you network AI FSM soldiers to have accurate animations across all clients?

My AI's transform is perfectly correct using Netcode for Game Objects 1.9.1.

But the animations even using networkanimator are innaccurate so the AI on one screen shoots and kills the player before it even aims at them but on the server it was aiming at them seconds before.

I sent logic updates to clients from the FSM with no computations but it is still wonky - and when the AI dies and all rigidbodies become kinematic so it can have an accurate ragdoll, it bugs out on the clients

[sharp axle]

Your AI FSM should only be running on the server/host. The network Animator and Transform should be keeping everything else in sync.

[normal peak]

any ideas for networked 3d dungeon generator

[sharp axle]

The basic idea would be that you send the generator seed to the other client in a RPC or NetworkVariable then have the client generate the scenes locally
https://docs-multiplayer.unity3d.com/netcode/current/basics/scenemanagement/using-networkscenemanager/#dynamically-generated-scenes

[reef delta]

Hey folks, I'm creating my own NetworkVariable by creating a class extending INetworkSerializable, which contains a public int, bool and a vec3 and quaternion. I've implemented the NetworkSerialize() method, and in another script I'm declaring it as such NetworkVariable<MyCustomClass>; however, Unity is complaining that "MyCustomClass: Managed type in NetworkVariable must implement IEquatable<MyCustomClass>". How do I proceed, just by making MyCustomClass extend 'INetworkSerializable, IEquatable<MyCustomClass>' or have I setup the NetworkVariable wrong?

[tame slate]

Can’t say what’s wrong for sure but just generally speaking, if your class doesn’t have any methods make it a struct. Also if your quaternion is for rotation just use a Vector3.

[sharp axle]

IEquatable I believe is used in NetworkLists.

[ivory mist]

Hey everyone 👋 I've followed this simple video (3m) to get started into Networking code
I have then installed Multiplayer Play Mode package to check if it was working
However I manage to spawn the Host thanks to NetworkManager but then I cannot seem to create new clients, anyone has an idea?

[sharp axle]

If you want to see the inspector in MPPM you can click Layouts in the top right corner after you click Play. You could also add buttons in the scene to start client/host

[ivory mist]

If you want to see the inspector in MPPM you can click Layouts in the top right corner after you click Play
Thanks! That's what I was looking for (it did work 🙏 )

Meaning I was starting to create the buttons to the Scene but the button is not working (doesn't register clicks yet, Idk why)

[trail shore]

Hello, I have a problem with Multiplayer. If start two projects on my pc, the multiplayer works, but if I send it to a friend in another Network, it doesnt work.

using UnityEngine;
using Unity.Netcode;
using UnityEngine.UI;
using Unity.Netcode.Transports.UTP;
using System.Net;

public class MainMenu : MonoBehaviour
{
    public InputField ipAddressInput;

    private void OnEnable()
    {
        NetworkManager.Singleton.OnClientConnectedCallback += OnClientConnected;
    }

    private void OnDisable()
    {
        NetworkManager.Singleton.OnClientConnectedCallback -= OnClientConnected;
    }

    public void ConnectHost()
    {
        string ipAddress = ipAddressInput.text; // Get the IP address from the InputField
        Debug.Log($"Attempting to connect to {ipAddress}...");

        // Set the address for the Unity Transport to connect to the specified IP address
        var transport = NetworkManager.Singleton.GetComponent<UnityTransport>();
        transport.SetConnectionData(ipAddress, 7777); // Assuming you are using port 7777

        // Start the client connection
        NetworkManager.Singleton.StartClient();

        gameObject.SetActive(false);
        Debug.Log("Connected");
    }

    public void CreateHost()
    {
        var transport = NetworkManager.Singleton.GetComponent<UnityTransport>();
        transport.SetConnectionData("0.0.0.0", 7777); // Host on all available IPs on port 7777

        NetworkManager.Singleton.StartHost();

        Debug.Log("Host started."); // Debug output

        string hostIp = GetLocalIPAddress();
        Debug.Log($"Host started on IP: {hostIp}"); // Ausgabe der Host-IP-Adresse

        gameObject.SetActive(false);
    }

    private string GetLocalIPAddress()
    {
        // Ermittelt die lokale IP-Adresse
        string localIP = "";
        foreach (var ip in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
        {
            if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) // Nur IPv4
            {
                localIP = ip.ToString();
                break;
            }
        }
        return localIP;
    }

    public void QuitGame()
    {
        Application.Quit();
    }
}```

[sharp axle]

You'll need to use the Relay Service if you are not on the same network

[trail shore]

Then I will directly see other players?

[sharp axle]

Once you both connect to the same relay session , yes

[trail shore]

Do you have an example or tutorial?

[sharp axle]

https://docs.unity.com/ugs/en-us/manual/relay/manual/relay-and-ngo

[trail shore]

tank you very much

[sharp axle]

The Multiplayer Services and Widgets packages make it super easy as well

[rare ivy]

Hi, I was wondering if I could get a bit more clarification when it comes to netcode. I'm trying to make a simple hide n seek game and at the moment I've used [Rpc(SendTo.Everyone)] above the methods to interact with a hiding space and whenever I interact with a hiding spot the debug messages appear for both clients and I get an error message on client2 (The one that's not hiding or pressing the interact button) that makes it seem like they're trying to interact with something not there. Is it because [Rpc(SendTo.Everyone)] makes the method get called to everyone? Or is this just how it works?

[sharp axle]

Yes, this will make the function run on every client and the server.

[rare ivy]

Figured, so if I wanted to interact with a door/locker/chest/etc where a gameobject changes in some type of way be a sprite being changed or a door/chest being opened or used. Which would I send to? Server?

[sharp axle]

Depends on what you actually want to do. An animation trigger or spawning a new object can be sent just to the server.

[rare ivy]

I want a player to be able to hide in a locker and the sprite of the locker goes from open to close. Other players can't hide in it but the seeker can open to reveal them. I already have that set, its just making it so that the method isnt called to everyone.

[dapper zinc]

Hi, i'm messing around with Distributed Authority, why i'm having this error even tho i'm checking if the user has authority and is owner before writing to this network variable?

using Unity.Netcode;
using UnityEngine;

public class EnemySpawner : NetworkBehaviour
{
    [SerializeField] private GameObject _enemyPrefab;
    [SerializeField] private float _defaultSpawnTime;
    [SerializeField] private NetworkVariable<float> _curSpawnTime = new(readPerm: NetworkVariableReadPermission.Everyone, writePerm: NetworkVariableWritePermission.Owner);

    private void Update()
    {
        if (!HasAuthority || !IsOwner)
            return;

        _curSpawnTime.Value -= Time.deltaTime;
        if(_curSpawnTime.Value <= 0f)
        {
            SpawnEnemy();
            _curSpawnTime.Value = _defaultSpawnTime;
        }
    }

    private void SpawnEnemy()
    {
        var instance = Instantiate(_enemyPrefab, transform.position, Quaternion.identity);
        var instanceNetworkObject = instance.GetComponent<NetworkObject>();
        instanceNetworkObject.Spawn();
    }
}

The error itself doesn't change anything in the gameplay, but it's annoying

This happens whenever i'm the session owner, leave (the session owner goes to someone else), and join again

From what i see it's giving me this error whenever i disconnect from the game

[gleaming zenith]

when trying to test my lobbies after making a build I keep getting this error when trying to join. Would anyone know the fix or a way to make your clones have unique ids?
Unity.Services.Lobbies.LobbyServiceException: player is already a member of the lobby

[dapper zinc]

I think a good solution would be to generate a random profile ID whenever the user opens the game for the first time and then save it locally or on cloud (steam and so on)

Something like

var profileName = Guid.NewGuid().ToString();
// Save it to your cloud or locally, re-use

For testing on editor with multiplayer play mode you can just pass in a new one every time you connect

[gleaming zenith]

for unitys relay service would you know where i could find the place to set the profileName?

[dapper zinc]

You call the async method MultiplayerService.Instance.CreateOrJoinSessionAsync(string sessionId, SessionOptions sessionOptions);, here is a example that i'm using (i basically implemented upon existing NGO samples):

    public async Task CreateOrJoinSessionAsync(string sessionName, string profileName)
    {
        if (string.IsNullOrEmpty(profileName) || string.IsNullOrEmpty(sessionName))
        {
            Debug.LogError("Please provide a player and session name, to login.");
            return;
        }

        _state = ConnectionState.Connecting;
        ConnectionStateChanged?.Invoke(ConnectionState.Connecting);
        try
        {
            if (!AuthenticationService.Instance.IsSignedIn)
            {
                AuthenticationService.Instance.SwitchProfile(profileName);
                await AuthenticationService.Instance.SignInAnonymouslyAsync();
            }

            var options = new SessionOptions()
            {
                Name = sessionName,
                MaxPlayers = _maxPlayers
            }.WithDistributedAuthorityNetwork();

            _session = await MultiplayerService.Instance.CreateOrJoinSessionAsync(sessionName, options);
            _state = ConnectionState.Connected;
            ConnectionStateChanged?.Invoke(ConnectionState.Connected);
        }
        catch (Exception e)
        {
            _state = ConnectionState.Disconnected;
            ConnectionStateChanged?.Invoke(ConnectionState.Disconnected);
            Debug.LogException(e);
        }
    }

Then i can connect by saying:

try
{
  await CreateOrJoinSessionAsync("YOUR_SESSION_ID_HERE", "YOUR_PROFILE_NAME_HERE");
}
catch (Exception e)
{
  Debug.LogException(e);
}

[gleaming zenith]

ok gotcha i will try to implement this into my code thanks for the help

[sharp axle]

You should probably use OnNetworkSpawn() to start a Spawn coroutine. HasAuthority is not getting updated until this object has spawned.

[tall creek]

Hi, I'm trying to make a server-authoritative variable, a cooldown. Only the server is allowed to change cooldown. Is this the way to go about it?

This is using Mirror

The script aims to spawn an object and apply a force to it. Only the server should be able to run this.

Are commands run with respect to the client or the server?

[sharp axle]

There is not really a reason to make cool down a network variable. Unless you want to display it in some kind of UI

[tall creek]

its more for anticheat

also other players should be able to see when this player's ability is on cooldown

[dapper zinc]

I can't use a coroutine due to the way the spawner will work, instead i made a simple bool based on your comment, it worked like a charm, thank you!

Now i'm having a little trouble on the distributed authority of enemies, what i want is that the player who takes the ownership of the session also takes the authority of all enemies, however there is this situation:

- Player 1 is the session owner, while he is the session owner a enemy is spawned
- Player 1 quits, player 2 gets the session/enemies ownership, everything is working like it should
- Player 1 re-joins, it gets the ownership of the enemies it spawned in the past instead of keeping to the current session owner

Here is a example, you can see ownership of objects based on their color:

Think i managed to solve it, i just dont know if its the correct way

[sharp axle]

I believe setting the ownership permissions to Distributable and RequestRequired will prevent the automatic transfer back

[dapper zinc]

I've set the ownership of the networkobject to "Transferable" instead of "Distributed", listened to OnSessionOwnerPromoted event, if i'm the new session owner i request the ownership of all the enemies

    public override void OnNetworkSpawn()
    {
        _isSpawned = true;
        NetworkManager.Singleton.OnSessionOwnerPromoted += OnSessionOwnerPromoted;
    }

    public override void OnNetworkDespawn()
    {
        _isSpawned = false;
        NetworkManager.Singleton.OnSessionOwnerPromoted -= OnSessionOwnerPromoted;
    }

    private void OnSessionOwnerPromoted(ulong sessionOwnerPromoted)
    {
        if (sessionOwnerPromoted != NetworkManager.Singleton.LocalClientId)
            return;

        foreach (var spawnedEnemy in FindObjectsByType<EnemyFollow>(FindObjectsInactive.Exclude, FindObjectsSortMode.None))
        {
            spawnedEnemy.NetworkObject.RequestOwnership();
        }
    }

(the findobjectsbytype is temporary just for testing purposes)

[dapper zinc]

It makes a lot of sense, but for some reason i have the same problem when doing this, idk if it's some other setting

[sharp axle]

I guess the automatic distribution overrides the request requirement. Could be a bug as well. It is kinda weird that they let you pick permissions that are not compatible with each other. The way you are doing it is probably the correct way for what you want

[dapper zinc]

Thanks

Is there any place i can check for the definition of those icons and numbers? there isn't any kind of tooltip or anything like that

I can't find it on the docs

[sharp axle]

Those icons are added by components. I don't remember about the numbers offhand

[high geyser]

So I was following a tutorial on Youtube and after finishing the MatchMaker Script I got over 40 errors for no reason and I can't really know how to solve the problem

Well at the start I got a problem with this line
public SyncListString matchIDs = new SyncListString();

but I managed to fix it by adding this
[System.Serializable]

public class SyncListString : SyncList<string> { }

after implementing that these whole errors popped up

[sharp axle]

I'm not too familiar with Mirror but it probably can not sync strings try one of the fixedstring types

[winter peak]

if I do execute ClientRpc on serverside player object then this RPC will be sent only to that owner of this object?

or in old unet ways I need to specify clientid in clientrpcparams ( old TargetRpc )

[tame slate]

I don't think you should be making a class that inherits from SyncList, it should just be declared as a variable inside of a NetworkBehaviour.

public class SyncListExample : NetworkBehaviour
{
  public SyncList<string> namesList = new SyncList<string>();
}

[high geyser]

I have already done that before and it worked! Thanks btw :)

[high geyser]

When I host the game everything works fine but the canvas isn't getting enabled?

{
    if(success)
    {
        lobbyCanvas.enabled = true;
    }
    else
    {
        joinMatchInput.interactable = true;
        joinButton.interactable = true;
        hostButton.interactable = true;
    }
}```
```        [Command]
        void CmdHostGame(string _matchID)
        {
            matchID = _matchID;
            if(MatchMaker.instance.HostGame(_matchID, gameObject))
            {
                Debug.Log("Game hosted success");
                networkMatchChecker.matchId = _matchID.ToGuid();
                TargetHostGame(true, _matchID);
            }
            else
            {
                Debug.Log("Game host didnt success");
                TargetHostGame(false, _matchID);
            }
        }

        [TargetRpc]
        void TargetHostGame(bool success, string _matchID)
        {
            UILobby.instance.HostSucces(success);
        }
    }```

even the game hosted success is popping up

[winter peak]

in this case I should not use dispose?

[fluid walrus]

iirc no, the reader is owned by the serializer being passed in, so you should expect it to be disposed elsewhere

[sharp axle]

I believe you would only need to dispose if you are using NativeArray/List

[fluid walrus]

buffer readers/writers can allocate native memory on their own, but unless you allocate them youself NGO usually does it for you

[remote jackal]

Hi. I am using NFGO 1.11.0, since the new v2 is only compatible with unity 6, and i am still on the LTS. The problem i am encountering, is when i set the transfrom position of a player object (i am using the non-server authoritative networktransform), the position reverts to what it was before. This happens on the player object that is owned by the host, that i set the position of to some x spawn point, and it still reverts to what it was before i set it. I tried to wait 0.15 seconds to set the position, and it still reverts, but less frequently. The player objects are already placed in scene, and when a player joins, ownership of the object is transferred to the player, and the player itself sets its own spawn position, that gets reverted. I don't think this is caused by ownership issues, since even if the host sets its own spawn point in Start() or first Update() (or 0.15 seconds after Start), it still reverts. I can share any code if needed

[viral ether]

hi chat

I have this struct for player data

void Start()
{
    PlayerData = CurrentPlayerData;
    CameraControl.Instance.SetCameraIndex(CurrentPlayerData.IsHost);

    if (IsServer)
    {
        SetPlayerDataOnServer();
    }
    else
    {
        RequestSetOpponentDataServerRpc();
    }
}

[ServerRpc(RequireOwnership = false)]
void RequestSetOpponentDataServerRpc(ServerRpcParams rpcParams = default)
{
    SetOpponentDataClientRpc(CurrentPlayerData, rpcParams.Receive.SenderClientId);
}

[ClientRpc]
void SetOpponentDataClientRpc(PlayerData data, ulong clientId)
{
    if (NetworkManager.Singleton.LocalClientId == clientId)
    {
        OpponentData = data;
    }
}

void SetPlayerDataOnServer()
{
    foreach (var client in NetworkManager.Singleton.ConnectedClientsList)
    {
        SetOpponentDataClientRpc(CurrentPlayerData, client.ClientId);
    }
}```

I'm trying to pass it in on a serverrpc and clientrpc

however, I think it needs to be serialized, but "System.Serializable" did not do the trick...

the list there might make my life complicated... any tip?

ChatGPT gave me this solution to serialize it, but it's kinda messy I assume there are better ways [Thread to not flood the chat]

[hollow osprey]

Hi everyone,

I'm developing a VR multiplayer application using Netcode for GameObjects with two Quest headsets, and I'm running into a weird synchronization issue.

Current behavior:

• Headset 1 can see its own position correctly
• Headset 2 can see Headset 1's position
• BUT: Headset 2 cannot see its own position
• AND: Headset 1 cannot see Headset 2's position

The strange part:

• Basic object synchronization works perfectly (when Headset 2 moves a cube, Headset 1 sees it and vice versa)
• Debug info always shows only 1 player (Player 1)
• Even on Headset 2, it shows "Total Players: 1" and "List of IDs: 0" (Player 1's ID)

My setup:

• NetworkObject component on XR Origin (XR Rig) with following settings:
  • Synchronize Transform ✓
  • Active Scene Synchronization ✓
  • Scene Migration Synchronization ✓
  • Spawn With Observer ✓
  • Auto Object Parent Sync ✓
• NetworkedHeadTracker script attached with NetworkVariable

I'm trying to display each player's position in a text UI element at the top of the screen. Despite the object synchronization working fine, it seems like there's an issue with player discovery or registration.

Has anyone encountered something similar? Any ideas what might be causing this or how to fix it?

Thanks in advance!

Here is how my code look like (2 files (100 lines of code in total))

[remote jackal]

Hi. I searched more online for my issue, and all solutions say to override NetworkTransform and set the spawn position with OnNetworkSpawned, but since all of my objects are already spawned when the scene is loaded, i can't do that. I will try writing my own position synchronization solution until i find a better solution for this.

[remote jackal]

After testing more, i found out that CharacterController was causing my issues, and this is not related to NetworkTransform at all. Other people have also been having issues with CharacterController resetting their transform, and that is where this issue comes from. If anybody else is having the same issue, i hope this helps.
Edit: the fix was to disable the CC temporarily, set the transform, then re-enable it

[hollow scroll]

Hello. I am using a networkvariable to sync a shape. When i join directly after starting the server everythings fine. But when i change the shape/networkvarible on the host and then try to connect a client i am getting an InvalidOperationException: Nullable object must have a value Error on line 2040 on the NetworkObject. The IsSceneObject property seems to be null. Any ideas?

[sharp axle]

What type is the network variable? It shouldn't be able to be null. Or you would need custom Serialization to handle a null value.

[hollow scroll]

Hello. The networkvariable is an integer that is initially 0.

[acoustic orbit]

Guys i got the multiplayer working with photon fusion. Everything is working well. But the car movement is not smooth. Its a bit jittery. Can anyone please tell me how to fix it. Thanks in advance

[sharp axle]

You've got something else going on there. Is this object a child of another Network Object?

[hollow scroll]

No. The script with the network variable is on a player prefab (that has a network objectcomponent) that gets instantiated after connecting. The weird thing is it only happens when i change the network variable before i try to connect a client.

[quasi meadow]

Question about Vivox
Does anyone have any issues when trying to create a Participant Tap when the Participant joins the channel? I'm trying to do exactly that (like this participant.CreateVivoxParticipantTap();), however it doesn't create the Participant Tap, and yes, I know that Taps can't be created on the local player

[quasi moth]

I'm trying to broadcast data between Android devices, so far I tried https://github.com/Unity-Technologies/multiplayer-community-contributions/tree/main/com.community.netcode.extensions/Runtime/NetworkDiscovery, wrote my own UDP broadcast, and found some code on unity forums none worked, the sending part works I can receive data sent from android devices but not receiving the data on android, So far I tried adding MULTICAST permission and acquiring multicastLock in Unity through Java calls and adding internet permission but nothing seems to work.

[tulip sky]

maruf

i found a answer

@quasi moth

dm me

if you want

ill brb

[oak flower]

@tulip sky If you have a solution, post it here, don't spam cryptic messages to DM you

[tulip sky]

my bad

its quite long didnt know it would be spamming

[oak flower]

You can create a thread and post there.

[tulip sky]

ok ill see what i can do

sorry for the mishap

[dire crag]

Is there a good tutorial that goes over how I properly make movement in a server authoritative game with predicting it on the clientside and rubberbanding back if discrepancies are detected?

[quasi moth]

Still looking for a solution

[oak flower]

There are some tools described here https://docs-multiplayer.unity3d.com/netcode/current/learn/dealing-with-latency/#client-side-prediction

Can also ask around on the dedicated Unity networking server, it's in the pins.

[sharp axle]

If you are using NGO, check out Client anticipation and its Sample

[dire crag]

thank youu

[silent vortex]

Its abit hard to understand how NetworkVariable works.. but i think im getting it. Just to confirm whenever you wanted to change NetworkVariable's value you have to send a server rpc?

[sharp axle]

Only if the server has write permissions. You can set them to have owner write permissions so the owner of the object can set its own values.

[silent vortex]

But by default its write permission is set to server?

[tame slate]

Yes

[silent vortex]

Neat thank you guys

[heady vault]

Having an issue where I have a NetworkObject on the parent, and then ClientNetworkTransform on both the parent and a child object. On the host client, everything stays good. on the 2nd client, the child transform scale x/y/z changes as soon as the network connects!

It takes the scale of the parent object, and appends the last two digits of that to the child object's original scale, changing the size of the child object!!? so wierd...

original: parent- 1.17 child - 0.01
after network connect: parent - 1.17 child - 0.0117

[sharp axle]

What version of NGO are you using?

[slim sage]

Hi I'm getting the error

Unity.Netcode.Editor.CodeGen.NetworkBehaviourILPP: Assets\PlayerController.cs(96,13): error - Rpc method must end with 'Rpc' suffix!

when the code clearly is named as such

[Rpc(SendTo.Server)] void CastSpellRpc(int spellNumber){ unitStats.Cast(spellNumber); }

I also get the same error (albiet for ServerRpc) when changing it to use [ServerRpc]

one oddity is also when i double click the error it opens an empty version of my script and when i close it it asks if i want to save, but when i remove the RPC line and force a random error, cdouble clicking opens the file properly

in fact I've just saved the file it opens and its now creating and referencing / Assets (notice the space)

when i remove the RPC line from the original it goes back to working fine?

[sharp axle]

If you already tried restarting the editor, I would do a full reimport of the Library folder

[sharp axle]

Try updating to 1.11. There were some fixes to parented network transforms

[heady vault]

package manager not showing any updates for it. is that a beta version or something?

[tame slate]

It’s a normal release. Recent versions take a bit to be listed on the Registry. Just add by name and specify the version number.

[sharp axle]

If you go to version history, the new versions should show up

[heady vault]

doesn't appear so...

[sharp axle]

I'm on unity 6. If you hit other versions there they show up. If not you can add the package by name by clicking on the + in the top left corner and specifying the version

[fluid lintel]

Do you guys know why this isn't working when I grab an object and call these methods on it?

// Call this method to request ownership transfer
[Rpc(SendTo.Server)]
public void RequestOwnershipServerRpc(ulong clientId)
{
    // Change ownership on the server
    ChangeOwnershipClientRpc(clientId);
}

[Rpc(SendTo.ClientsAndHost)]
void ChangeOwnershipClientRpc(ulong clientId)
{
    GetComponent<NetworkObject>().ChangeOwnership(clientId);
}

I'm using this line when calling it:

objectGrabbed.GetComponentInParent<Item>().RequestOwnershipServerRpc(OwnerClientId);

I get the "Only a server can change ownership" error message

[high geyser]

How can I make the player able to host a game and when he host a text shows the code of the lobby, then the client be able to join with that code? (using mirror)

[tame slate]

Exactly what the error message says - only the server can change ownership. You’re making the ownership change call inside of a ClientRPC.

[sharp axle]

You can use Unity Lobby or other similar services
https://docs.unity.com/ugs/en-us/manual/lobby/manual/unity-lobby-service

[high geyser]

that's actaully pretty good

Thanks man

[fluid lintel]

Right, that makes sense. However, when I change it to be in the ServerRpc call, I get the same thing.

// Call this method to request ownership transfer
[Rpc(SendTo.Server)]
public void RequestOwnershipServerRpc(ulong clientId)
{
    // Change ownership on the server
    GetComponent<NetworkObject>().ChangeOwnership(clientId);

    //ChangeOwnershipClientRpc(clientId);
}

Idk if it matters, but I have the network transform a uthority mode as "Owner"

[maiden tartan]

I’ve been using mirror for multiplayer but I’ve seen some of the things Unity has been doing recently and have been wandering if I should change over to using Unity for it. Should I do this and if so how easy or hard would it be to switch everything over

[tame slate]

They're quite similar in terms of general syntax, would be one of the easiest ports you could do most likely.

https://docs-multiplayer.unity3d.com/netcode/1.11.0/installation/upgrade_from_UNet/

[maiden tartan]

Should I do it though. I do know they are very similar in terms of syntax. What about the components. Are they also similar?

[tame slate]

That's entirely up to you. What one you like working with, what one works better for your project, etc.

If you value ease of integration with other Unity Services like Auth, Lobby, Relay, etc. and like the new features NGO is coming out with, then yeah, I'd probably say it's worth the switch.

Yes the components are also very similar.

[maiden tartan]

Ok. Thanks

[sharp axle]

You should not be getting the same error message with this code.

[fluid lintel]

But I am 😢 lol

[sharp axle]

If the client is still running that server RPC then you have something else wrong. Make sure that script is a network behavior

[silent vortex]

Hi I'm using Unity's Multiplayer Playmode however I'm unable to resize player 2's window horizontally. How do I resize the window?

[fluid lintel]

Oh, good call! It wasn't a NetworkBehavior script, so that's why it wasn't working. Thank you!!!!!!

[safe minnow]

[Netcode] Deferred messages were received for a trigger of type OnSpawn with key 0, but that trigger was not received within within 1 second(s).

Why do i receive this message on console whenever i try to interact with something on the client? It never gave me problems but now it is giving me problems out of nowhere

[sharp axle]

Usually I see that when you send an RPC before OnNetworkSpawn() or in ClientConnectionCallback

[safe minnow]

thanks for the help, i'll try search on the code something like that

[gilded hound]

Hey you guys, I got this error when sending an RPC in Netcode for Entities. How do I determine when the handshake approval is complete?
[ServerWorld] Cannot send non-approval RPC 'Unity.Collections.NativeText.ReadOnly' to Entity(786:3) as NetworkConnection[id1,v1] is in state Handshake! Wait for handshake and approval to complete!

[sharp axle]

Depends on if you are using Connection Approval for not. But there are Connection Events
https://docs.unity3d.com/Packages/com.unity.netcode@1.3/manual/network-connection.html#netcodeconnectionevents-on-the-server

[gilded hound]

Thanks! very useful

[junior sapphire]

Hi, anybody familiar with using NGO (with SSL websockets encryption enabled) and any tips for reducing ping? I can't seem to get anything under 200ms RTT and that's using my own servers in my region?

Is it just downside of using TCP websockets to have such high ping in NGO rather than UDP?

[sharp axle]

The transport type has little to do with the ping times. TCP does have more overhead and resending packets can increase latency.

[junior sapphire]

Hmm might just be the servers I’m using. Would you recommend a certain cloud provider other than UGS? Amazon Gamelift looks reasonable?

[fluid lintel]

Do you guys have any recommendations or tutorials for how to get my multiplayer game set up to build and play with friends without using stuff such as Relay? I'm using Netcode for GameObjects, but I don't want to be chained to Unity's paid stuff if I don't have to.

Edit: All the functionality is working and set up. I'm just looking to build it now and get friends and other players to be able to play it

[ripe mesa]

Use tunneling service

Such as ngrok (tcp only)
playit.gg
Or hamachi (not recommended)

And relay is free at certain limit

[fluid lintel]

Yeah I'd rather do something on my own though. So you're saying there is no other way than a 3rd party app for people to play my game?

[sharp axle]

You can either have your players set up port forwarding or roll your own relay server

[ripe mesa]

its the way traditional games works too

like terraria/minecraft, people were using 3rd party service to play with their friends

[tame slate]

Relay’s free tier limits are very generous. It’s impossible to go over the limit if you’re just testing with friends. You wouldn’t even come close to it.

And it would be built in to your game with a relative amount of ease. So it would take you little time to set up and means nobody has to download anything extra when wanting to play your game.

[low cave]

Fishnet

[low cave]

huh

[tame slate]

FishNet is a networking solution to code multiplayer games. He's looking for a connectivity solution/service that allows him to play his already coded game (with NGO) over the internet with others.

[blissful jay]

NGO is far better than fishnet, especially now that NGO has host migration 🔥

[tender nexus]

Hi, I'm currently having an issue with netcode for gameobjects where If i destroy the player objects spawned automatically that client will stop syncing all other gameobjects. Everything functions normally for any other client connected.

void Kill()
{
    GameObject camera = GameObject.FindGameObjectWithTag("MainCamera");
    Vector3 cameraPosition = camera.transform.position;
    Quaternion cameraRotation = camera.transform.rotation;

    SpawnSpectatorClientRpc(cameraPosition, cameraRotation);

    NetworkObject networkObject = gameObject.GetComponent<NetworkObject>();
    networkObject.Despawn();
}

[ClientRpc]
void SpawnSpectatorClientRpc(Vector3 position, Quaternion rotation)
{
    if (!IsOwner) return;
    Instantiate(spectatorPref, position, rotation);
}

If I don't destroy the player object, everything stays synced.

[sharp axle]

The Player object shouldn't have any effect on the other network objects. Do you have anything else happening in OnDestroy() on the player object?

[tender nexus]

no, I have nothing

Im losing my mind trying to figure this out

Everything on the player

the changes in SpawnSpectator are just me trying a bunch of things dont worry about the mismatch

[sharp axle]

Only the host/server can despawn network objects. That could be throwing an exception

[tender nexus]

thats what i was saying here

I was just covering my bases

despawning on the server removes the player object on all clients

throws no errors

and just stops syncing on the client that had their player removed

with this code

void Kill()
{
    GameObject camera = GameObject.FindGameObjectWithTag("MainCamera");
    Vector3 cameraPosition = camera.transform.position;
    Quaternion cameraRotation = camera.transform.rotation;

    SpawnSpectatorClientRpc(cameraPosition, cameraRotation);
    // SceneManager.LoadScene("StartMenu", LoadSceneMode.Additive);

    NetworkObject networkObject = gameObject.GetComponent<NetworkObject>();
    networkObject.Despawn();
}

[ClientRpc]
void SpawnSpectatorClientRpc(Vector3 position, Quaternion rotation)
{
    if (!IsOwner) return;
    Instantiate(spectatorPref, position, rotation);
}

[fluid lintel]

Yeah I've used FishNet before and loved it. Try NGO this time and I guess we'll see how things go. Similar to me so far.

[jagged bridge]

Helloo everyone, I don't know why car network object just spawned on host and on client it not spawned,

It's strange, because follow loop it should spawn more than 1 car when load scene done, but runner.spawn just spawn one car with input authority of player 1 (host) and the second car not spawned with input authority of player 2 (client)

here is my script

[analog pawn]

this seems almost like photon fusion if it is then thats prob a bug with your spawning script as someone said "if your spawning script doesnt spawn it for the client but the player spawns that means your code must be broken"

[dire crag]

AnticipatedNetworkTransform.AnticipateMove() Does this line alone handle client and server or do I still need to send a ServerRPC for the server to check that the new position is correct?

[sharp axle]

That is only for the client side. You still need to send the inputs to the server in a Move RPC
Check out the Anticipation Sample

[jagged bridge]

Thank you for replying to me, yes it's photon fusion, I think I can know the problem come from my game object had attached rigidbody, but I just used network transform not network rigidbody. I'm going to test it again to see it right or not

[analog pawn]

ah

[tawdry stump]

Has anyone ever tried using the Multiplayer play mode ? It crashes when I try activating a second player. Its a fresh URP project
Image

[sharp axle]

What version of the Editor and MPPM are you using?

[tawdry stump]

I tried with botg 6000.0.16f1 and the last stable release, tried both 1.2.2 and I think 1.3.1? can't recall

[sharp axle]

Whats the build platform? I haven't had any issues with the latest versions

[tawdry stump]

Windows 11 Education 23H2

[sharp axle]

make sure to submit that bug report

[grave trellis]

Hello, I'm making a game where each player has a 'Character' object that has about 300 states. Their usage is rare. Can someone tell me please which approach is more efficient and why? Approach 1: Each client has a local 'Character' object, and the server has all the players' characters stored locally. Decisions are made on the server based on the data from the local characters on the server. Updates are sent to the players via ClientRPC to refresh the data. Approach 2: Each state/variable in the character is a NetworkVariable. (Decisions are still made by the server, etc., but the server no longer holds a local copy of all the characters).

[hearty dock]

Anyone know what's going on with NetworkManager.OnReanticipate? The documentation claims that the delegate should accept three parameters. However the delegate type provided only provides the round trip time (third parameter from the comment). Is this a bug / oversight?

(this is from Netcode for GameObjects 2.0.0)

[sharp axle]

The comment there (and API docs) are wrong/outdated.
https://docs-multiplayer.unity3d.com/netcode/current/advanced-topics/client-anticipation/#global-onreanticipate

[hearty dock]

Thank you.

[olive vine]

hi all, im new to networking, and im getting a warning that slightly confusing.

this is the error i recieve

[Netcode] [Deferred OnSpawn] Messages were received for a trigger of type NetworkTransformMessage associated with id (77), but the NetworkObject was not received within the timeout period 10 second(s)

i am spawning a projectile and giving it ownership using this code.

[ServerRpc]
private void OnFireShellServerRPC()
{
    OnFireShell();
}

void OnFireShell()
{
    NetworkObject newProjectile = Instantiate(projectile, firePoint.position, firePoint.rotation).GetComponent<NetworkObject>();
    newProjectile.GetComponent<NetworkObject>().SpawnWithOwnership(OwnerClientId);
}

void Fire()
{
    if(!IsOwner)
    {
        return;
    }
    if(IsServer)
    {
        OnFireShell();
    }
    else
    {
        OnFireShellServerRPC();
    }
}

i am despawning it with this code.

public override void OnNetworkSpawn()
{
    base.OnNetworkSpawn();
    rb.AddForce(transform.forward * projectileSpeed, ForceMode.Impulse);
    StartCoroutine(DespawnAfterTime());
}

IEnumerator DespawnAfterTime()
{
    yield return new WaitForSeconds(timeBeforeDespawn);
    DespawnProjectile();
}

protected virtual void DespawnProjectile()
{
    if(!IsOwner)
    {
        return;
    }
    if(IsServer)
    {
        OnDespawnObject();
    }
    else
    {
        OnDespawnObjectServerRPC();
    }
}

[ServerRpc]//called on the server, not on client
void OnDespawnObjectServerRPC()
{
    OnDespawnObject();
}

void OnDespawnObject()
{
    NetworkObject.Despawn();
    Destroy(gameObject);
}

any help would be greatly appreaciated

[sharp axle]

Don't destroy the game object. It needs to still exist to receive the Despawn message. Despawning will take care of the game object as well. Disable the renderer if you need it to disappear locally.

[jolly tinsel]

are there ways to reduce the latency with unity relay because everything is very async und buggy and i cant display the ping it always says 0ms

[sharp axle]

There is not much you can do about the actual network latency. But check out the Ping Tool to see the ping to the relay service.
Client Anticipation can help you deal with the latency

[ocean wadi]

Alright so I've been working on a single player game for a while now, but recently I decided that I would like for it to have multiplayer functionality. I guess I am a little confused on where to even start converting my game to multiplayer and I was wondering if anyone had some resources/advice on where to start. I'm not looking for a dedicated server for hosting, I would want it so that the host player's computer would act as the server.

[sharp axle]

Really depends on how far along you are. Adding multiplayer after the fact is going to be a bad time. A lot of things will have to be rewritten. But in general, pick a networking library first. That will steer you towards what Relay services you can use.

[vivid tide]

hiya! i don't really have much experience with websockets but my friend has made the backend for my game. most of the functionality is up and running but i'm struggling to figure out why i'm not receiving packets of chunk data, so i've been going back and forth with chatgpt and gemini to no avail.

it's a mess at the moment but what i'm hoping is that my RecieveChunkData() method receives those packets of chunk data sent from the server. right now it only receives the information given by the server on connection to the websocket.

any help is greatly appreciated as i've been struggling with this for days. thanks in advance, and so sorry for the newbie question.

[sterile creek]

What behaviour are you seeing?

[vivid tide]

it's currently receiving the first message sent from the server containing some other info, but then i'm also receiving that whenever it sends me a chunk packet? at least that's how i'm understanding it.

[olive vine]

alright, one more thing, this time im looking for critique, improvbments, anything to help me grow here. how bad is this code, which keeps track of clients with their usernames?

public class LobbyPlayerHandler : NetworkBehaviour
{
    // Store the incoming connections
    public static NetworkVariable<Dictionary<ulong, FixedString32Bytes>> PlayerData = new NetworkVariable<Dictionary<ulong, FixedString32Bytes>>(new Dictionary<ulong, FixedString32Bytes>());
    public string PlayerName;

    private static bool eventsRegistered = false;

    public override void OnNetworkSpawn()
    {
        //allows registration of events only once while confirming registrar
        if (IsServer && !eventsRegistered)
        {
            NetworkManager.Singleton.OnConnectionEvent += OnClientConnected;
            NetworkManager.Singleton.OnConnectionEvent += OnClientDisconnected;
            eventsRegistered = true;
        }
    }

    private void OnClientConnected(NetworkManager manager, ConnectionEventData connectionData)
    {
        //dont know if this is needed
        if (!IsServer)
        {
            return;
        }

        // Add the client to the PlayerData dictionary
        if (connectionData.EventType == ConnectionEvent.ClientConnected)
        {
            AddClientUserName(PlayerName, connectionData.ClientId);
        }
    }

    private void OnClientDisconnected(NetworkManager manager, ConnectionEventData connectionData)
    {
        //dont know if this is needed
        if (!IsServer)
        {
            return;
        }

        if (connectionData.EventType == ConnectionEvent.ClientDisconnected)
        {
            // Remove the client from the PlayerData dictionary
            RemoveClientUserName(connectionData.ClientId);
        } 
    }
    private void AddClientUserName(string userName, ulong clientId)
    {
        //dont know if this is needed
        if (!IsServer)
        {
            return;
        }

        //debug to see what client is joining
        Debug.Log($"{OwnerClientId} called this method!");
        //convert a string that we get from other code into a fixed string to pass later
        FixedString32Bytes convertedString = new FixedString32Bytes(userName);
            
        //check if the client number doesnt already exist
        if (!PlayerData.Value.ContainsKey(clientId))
        {
            PlayerData.Value.Add(clientId, convertedString);
            //collection requires me to do this after modification
            PlayerData.CheckDirtyState();
        }
        else
        {
            Debug.LogWarning("Client with ID " + clientId + " already exists.");
        }
            
        //this is another debug to ensure i am getting the string into the dictionary and getting it appropriately
        PlayerData.Value.TryGetValue(clientId, out convertedString);
        Debug.Log(convertedString.ToString());
    }

    private void RemoveClientUserName(ulong clientId)
    {
        //just remove the thing :)
        PlayerData.Value.Remove(clientId);
    }
}

[sharp axle]

You can't have static network variables but otherwise it's seems fine.

[tame rampart]

how would I get logging from the Network Manager to show in game? such as an in-game console or something like that

[fluid walrus]

you could use Application.logMessageReceived? if you're using NGO the messages should usually start with [Netcode] so you can identify them

[vivid tide]

bumping this, would very much appreciate any help!!

[flat shore]

Hello, maybe this has been answered a lot, but I tried lot of things and no one worked. I have this error when a client wants to join an ongoing lobby:

[Netcode] A ConnectionRequestMessage was received from a client when the connection has already been established.

When the client joining the server starts well, he connects to the lobby (even the server has all the callbacks)

Im using Unity Netcode 2.0.0, Lobby 1.2.2, Relay 1.1.1 & Unity 6000.0.21
Im also using Unity Transport with Relay Unity Transport

SceneManagement isOn, Connection approval is on bu approves everyone for the moment (Approved = true)

[tame rampart]

I just started trying to do netcode stuff, and sometimes I get this problem where if I try to start a client, this happens

how would I debug an issue like this?

it just immediately fails

[tame rampart]

this time I knew why it was happening i think, it was because I had a regular rigidbody on my player prefab

something like that.... and after I removed it, the client could connect again

but in the future it won't be so obvious what's wrong.. so how does everyone do troubleshooting

[sharp axle]

I use https://github.com/yasirkula/UnityIngameDebugConsole

[sharp axle]

Sounds like the client is trying to connect twice

[ocean wadi]

So I was just getting into networking and learning about it. I just learned about networking variables and how you can restrict certain client for writing certain data. The first thought that comes to mind is that the purpose of this is for data security so that clients can't manipulate particular vital game data. But I was wondering, if I am planning on making a casual game where I don't necessarily mind I guess player cheating (as it would only hurt their own experience) what form of data communications would I want?

Would I still want the client to handle most of the data changing and having the clients just read the data? Additionally, I wouldn't want players to be able to change the data of other players, only their own if they really want to.

[sharp axle]

General rule of thumb is that network variables are for persistent state data and RPCs are for one off events.
And network object can only have one owner that has wrote permission so no need to worry about changing other players data.

[ocean wadi]

I have a question regarding networking. So I am in the middle of converting my single player game to multiplayer, and I have an object pooling system. I am getting an error at the start of the scene that pretty much says that I shouldn't reparent an object before starting a server or host. I understand what is going on, as I am just instantiating and trying to reparent the a particular object at the start of the scene without a host running...

All I really have to do is start a server or a host at the start of the scene before the object pooling system starts up. BUT...

For games such as lethal company, where you start the game solo and have friends join you at the start of the game, how does this work? Does this mean that when you start the game you are still technically a host/server, just without any clients?

I'm wondering if I should be starting a host as soon as the user presses play or if I would want to do that at a different time

[sharp axle]

Yea, for solo mode you would start a host and connect to itself. Not too familiar with Lethal Company, but if you are sharing lobby codes to join matches, that is easy to set up too

[indigo mesa]

Could anybody here help me out?

I'm trying to get my app released on the google play store

I need 20 closed access testers to get it published

[opal dust]

I don't know if this is the right place to ask, but I have a multiplayer unity project. In my project, on a single client, I have a texture that I draw to at about 60fps. I need to take that texture data and somehow provide that data to every other client. I'm using Unity's netcode for gameobjects at the moment but I'm open to other tools.

Unfortunately, the code I'm running to calculate the data for the texture cannot be simulated on other clients.

I know Unity isn't really optimized for streaming textures across the network (let alone multiple textures which I'll eventually need to be able to scale to), but are you aware of any tools / packages that might offer some help with this.

[dry maple]

I know Unity isn't really optimized for streaming textures across the network

No, it has nothing to do with Unity.

This is bad for any game, or real-time app with many connected clients, and should be avoided completely unless it's really really needed.

Unfortunately, the code I'm running to calculate the data for the texture cannot be simulated on other clients.

Why?

[opal dust]

Yeah, I'm aware that not being able to simulate the code on other clients isn't ideal. If I could then that would make things a lot simpler. It's a bit too complex to go into, but I am actively trying to figure out a work around as video streaming is a last result. But basically I'm using a dll which contains many static methods, and has no concept of instances, and is expecting to operate on a singleton basically. I didn't write this dll so I can't modify the source code etc. unfortunately. Each client will be able to run their own singleton process (that's the best way I can describe it), and then data about what other client's are doing (in this case the texture data) is shared across the network. I'm working on creating a wrapper that will hopefully containerize this dll so I can have multiple instances running on a single client which will mean I won't have to go the route of streaming the textures.

[sharp axle]

Sounds like you want to stream video. You'll want to look into WebRTC

[opal dust]

Thanks, I'll take a look. Hopefully I can get this wrapper working and I won't have to stream video. Out of curiosity though do you know how well WebRTC scales with multiple streams? Each of these textures are about 250 pixels in width and height, being updated at about 60fps

[sharp axle]

If i remember right, it has multicast support
https://docs.unity3d.com/Packages/com.unity.webrtc@3.0/manual/index.html

[ocean wadi]

Alright so I am running into an issue with my networking system. So what I want is to make it so that when the player presses the play button, he is spawned in in the home base. I want to make it so that the player has an option to invite or join a friends world/game. In order to achieve this would I need to start a host/server as soon as the player joins the game? If so, how would I test this, as I would need to check if a hosting on the local IP is available, as I would be testing between a build and a playtest on the same machine.

Using Netcode

[sharp axle]

Really depends on how your game is set up. Normally for single player you would start a host session and connect to localhost. If you want to start a multiplayer session then you would end that host and start a Relay connection for others to join.

[zinc plover]

Has anyone seen this before? I am trying to change the way a script acts based on whether IsServer is true, so I am checking during OnNetworkSpawn, but OnNetworkSpawn is never being called. I am instantiating the object after the relay session has already started

I saw something in a forum about having a duplicate network manager object but I don’t have that

[sterile creek]

Do you have logs you can share?

Is it getting into ProcessReceivedData?
Does this ever receive data?
result = await clientWebSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
Do you get any errors?

[sharp axle]

If you are switching scenes then make sure you are using Network Manager Scene Manager. Otherwise as long as the network object is active, OnNetworkSpawn will always get called

[sterile creek]

Are you calling Spawn on the object? If your instantiating it, the server must spawn it

[zinc plover]

This is probably the issue. Thanks a lot

[ocean wadi]

One thing I noticed is that after setting up a network system using Netcode, players spawned as a host or client function normally, but players just spawned using regular instantiate ignore collision and can walk through walls. Not a problem but, I was just wondering what the reason for this was.

[winter peak]

if something is nullable example abstract class there is no easier way to make this than this?

[sharp axle]

You can create a custom serializer for the owner hub class
https://docs-multiplayer.unity3d.com/netcode/current/advanced-topics/custom-serialization/

[safe minnow]

im following the codemonkey tutorial and all of a sudden some things stopped working like the spawn plate every 5 seconds (as you can see the server has plates and the client doesn't). The one above is the client and the one below is the server. It is giving me this warning:
[Netcode] Deferred messages were received for a trigger of type OnSpawn with key 4, but that trigger was not received within within 1 second(s).

im stuck like this for days, idk what to do to continue

i tried searching online but nothing

[tame slate]

Code you're using to spawn the plates? Or any code related to the plates?

[safe minnow]

imma send it rn

Piece of code related to the plate

private void Update()
    {
        if (!IsServer) return;
        spawnPlateTimer += Time.deltaTime;
        if (spawnPlateTimer > spawnPlateTimerMax)
        {
            spawnPlateTimer = 0f;

            if (KitchenGameManager.Instance.IsGamePlaying() && platesSpawnedAmount < platesSpawnedAmountMax)
            {
                SpawnPlateServerRpc();
            }

        }
    }
    [ServerRpc]
    private void SpawnPlateServerRpc()
    {
        SpawnPlateClientRpc();
    }

    [ClientRpc]
    private void SpawnPlateClientRpc()
    {
        platesSpawnedAmount++;

        OnPlateSpawned?.Invoke(this, EventArgs.Empty);
    }

Another piece of code related to the plate that is connected to the first one some way:

private void Start()
    {
        platesCounter.OnPlateSpawned += PlatesCounter_OnPlateSpawned;
        platesCounter.OnPlateRemoved += PlatesCounter_OnPlateRemoved;

    }

    private void PlatesCounter_OnPlateRemoved(object sender, EventArgs e)
    {
        GameObject plateGameObject = plateVisualGameObjectList[plateVisualGameObjectList.Count - 1];
        plateVisualGameObjectList.Remove(plateGameObject);
        Destroy(plateGameObject);
    }

    private void PlatesCounter_OnPlateSpawned(object sender, EventArgs e)
    {
        Transform plateVisualTransform = Instantiate(plateVisualPrefab,counterTopPoint);

        float plateOffsetY = 0.1f;
        plateVisualTransform.localPosition = new Vector3(0,plateOffsetY*plateVisualGameObjectList.Count,0);

        plateVisualGameObjectList.Add(plateVisualTransform.gameObject);
    }

the first one makes sure the server every spawnPlateTimerMax spawns a plate for all the clients

and the second one is executed by the client to instantiate the plate or remove it

[safe minnow]

@tame slate yo please help me on this

[tame slate]

im following the codemonkey tutorial and

[ocean wadi]

hi so i'm currently converting my single player game to multiplayer using Unity's NetCode. pretty much I have a scene transition between the player's home base and the actual in level/dungeon scene. i want all the multiplayer connections to be handled in the home scene and the players all enter the dungeons together and maintain control over their characters. i was wondering, currently when i change scene the player is just re instantiated and the previous data values such as health or equip weapons are reset with the newly spawned player. would this method still be recommended for networking? i feel like it would be easier to have the players do not destroy on load so that they can just be toggled on and off and reset when the scene is loaded. if it is not easier, where would i start with to i guess re establish all the connections of the players after the scene has changed with all the current equip weapons and stats?

[fluid walrus]

you should be able to turn on "active scene synchronization" for the players which moves them to the next active scene automatically when you switch scene

[modern lintel]

how do i make it to where the player spawns when your onnected

and it doesn't make other people control your player

nvm

[winter peak]

someone made any roslyn analyzers for networking? like example some field is using NetworkVariable soo analyzer will add .Value if its missing when something else wants to get value from this field

[winter peak]

pain while trying to create own analyzer + codefix

.Value is added but yes it will add .Value even when its here

[winter peak]

seems like its working, only if someone made this for most stuff in netcode heh

[winter peak]

FastBufferReader.Length == Remaing data?

[dry maple]

You are too bored of doing variable.Value = something instead of variable = something?

[winter peak]

I mean when project is massive then lol, already converted all

[dry maple]

Yea, I totally agree, it looks ugly.

[acoustic vault]

Hello, I'm using Multiplayer widgets, its auto spawning my player prefab when I start the scene but I could'nt figured out how to change spawn position, even I change host's spawn position, guest clients still spawning in 0,0,0, anyone knows how to fix that?

[vernal osprey]

Hello everyone.
I'm using NGO with steamworks and the SteamNetworkSockets Transport and want to create a couch coop (client authority is fine).
I can create a lobby and other clients can join the lobby. (Updating the lobby name works for both host and clients)
The problem: On the host machine, only the host player is visible. On the client machine, no player is visible. As far as i understand, networkobjects should be synchronised automatically, and also StartClient() should automatically spawn the playuer prefab. is that correct?
I'm using the Singleton methods for StartHost and StartClient.
In the NetworkManager, the Network Topology is set to Client Server.
The Ownership of the NetworkObject of the PlayerPrefab is set to Transferrable. The Authority on the Client Network Transform is set to Owner.
Is there anything i have to do besides StartClient() on the client to be able to see the host player? And why does the client prefab not spawn?
What am i doing wrong? Thanks for helping me

[fluid lintel]

Hey everyone! Maybe this is a noob problem, but how do you guys handling passing any sort of object that isn't simple into a parameter to pass along the network?

For example:

[ServerRpc]
private void SetTriggerServerRpc(Animator anim, string triggerSetting)
{
    SetTriggerClientRpc(anim, triggerSetting);
}

I get the error that states: "Don't know how to deserialize UnitEngine.Animator"

[tame slate]

Usually use simple types to represent a value that can be used to look up a specific object in a collection that each client has -> Enum representing the type of the object in the collection, int representing the index of the object in the collection, etc.

In your case, why do you need to send an animator?

[fluid lintel]

I'm trying to update a variable on the Animator so I can change an animator for all clients. However, I'm finding that maybe I should have a script attached to the object I'm trying to animate, call that, and use a networked variable to sync the status

[tame slate]

I should have a script attached to the object I'm trying to animate

Definitely the way to go.

There's also NetworkAnimator

[fluid walrus]

if you do want to do it the original way, there's NetworkObjectReference, which you can serialize in an RPC and presumably call GetComponent on at the other end

[fluid lintel]

Would you use this like any other component? Getting the component in start and setting a trigger via networkAnimator.SetTrigger("On")?

NetworkAnimator netAnimator;

private void Start()
{
    netAnimator = GetComponent<NetworkAnimator>();
}

// Call this function when you want to update the animator parameters
[ServerRpc(RequireOwnership = false)]
public void SetAnimatorTriggerStatusServerRpc()
{
    SetAnimatorStatusClientRpc();
}

[ClientRpc]
public void SetAnimatorStatusClientRpc()
{
    netAnimator.SetTrigger("On");
}

[tame slate]

You wouldn't use it in a ClientRpc generally

Works similar to NetworkTransform, the Server or Owner makes changes and the component auto syncs the changes to other clients

[fluid lintel]

oHHHHHHHHHHHH

[tame slate]

Also for any other Animator parameter, you can just update the normal Animator component directly and NetworkAnimator will sync it

Triggers are the only one you need to do it on the NetworkAnimator

[fluid lintel]

Yeah it looks like triggers are a special breed of difficult

Thank you for this 🙂

For anyone wondering in the future, here is the solution for setting a trigger over the network:

public class AnimatorSync : NetworkBehaviour
{
    NetworkAnimator netAnimator;

    private void Start()
    {
        netAnimator = GetComponent<NetworkAnimator>();
    }

    // Call this function when you want to update the animator parameters
    [ServerRpc(RequireOwnership = false)]
    public void SetAnimatorTriggerStatusServerRpc()
    {
        netAnimator.SetTrigger("On");
    }
}

[deep wasp]

Hi guys, i'm doing an inventory system on my game and i want to put an object in the hand of the player. How to do that (cause i can't parent network objects to non-network objects) ? Do i have to put joints?

[fringe imp]

How does one usually go about handling starting a hosted/online game up after spawning? Do you spawn a empty game object and then add things a player would usually contain? or spawn everything hidden and then unhide it?

[sharp axle]

Depends on the type of game. In a round based game like a FPS, you spawn the players then wait for everyone to join then start a countdown to start the match. You might have a separate scene that you load in.

You'll need a custom serializer for Tile base
https://docs-multiplayer.unity3d.com/netcode/current/advanced-topics/custom-serialization/

[frozen depot]

Hello! I've a simple question I can't find a specific clear answer. I'm building a multiplayer game using netcode for gameobjects (Unity 6). I've been reading about lag compensation and server reconciliation. But using the basics of my first level along with Multiplayer Play Mode, I don't see any lag happening (client side). Am I missing something?

[tame slate]

What have you networked so far?

[frozen depot]

4 car controllers, traps with animations and 1 spawned object.

[tame slate]

What components are you using to sync those things?

[frozen depot]

Network object + Client Network Transform + Network Rigidbody as basics, then a couple NetworkBehaviour holding some variables for health, name.

Using up to 4 instances using the Play Mode does not throw any noticiable lag moving all cars at the same time

[tame slate]

Using a Client Network Transform basically means the client can move freely on their own without having to send information to the server in order to move

Which means locally your movement is not subject to lag

Also you will overall generally just have a smoother experience with Multiplayer Play Mode as all of your clients exist locally on your machine and it does not simulate a real networking environment

[fringe imp]

try out network simulator, test real network conditions and see if you have any big lag, like dylan said thought locally you probably wont see much

[frozen depot]

Thanks @tame slate @fringe imp . So before I move on with more development this is something I would need to take care right? That's why I'm asking. There's no "magic" behind netcode for gameobjects to deal with this.

[tame slate]

to deal with what?

[frozen depot]

Find a solution for lag and/or server reconciliation.

[tame slate]

Why does your game need these? Not saying they don't - just wondering.

[frozen depot]

I understand, Dylan. I'm speaking from a place of uncertainty because right now, using what's in the documentation, it works well (I don't see any lag). But I'm not sure if I'll need to apply some of these techniques later on when I have a level with many objects, data, and so on.

[tame slate]

Lag Compensation and Server Reconciliation are advanced techniques that help minimize the effects of latency that the player feels. They don't just magically remove latency or reduce it.

Server Reconciliation isn't typically used with client authoritative setups to my knowledge, so I wouldn't worry about that.

If your game has very quick interactions between players, you may find implementing some form of lag compensation is helpful. But you'd have to implement that on your own, and I wouldn't do it prematurely, only if you notice quick interactions between players don't look right or aren't working as intended.

[frozen depot]

That's very clear. Thank you @tame slate 🙂

[tame slate]

later on when I have a level with many objects, data, and so on.

The techniques you described wouldn't help with this. The best thing you can do to prevent the scale of your game from slowing down networking is mainly two things:

• Use simple data to network things and try to use small amounts to accomplish what you want to
• Only sync things over the network when needed

But generally, if things are working well just keep on keeping on. Premature optimizing can get you in trouble

[sharp axle]

Get the basics down first. But you'll want to look into Client anticipation and Distributed authority

[ocean wadi]

Hi! So I had a question I feel like this should be an easy fix but I'm not finding the answer online, pretty much I have the player movement and transitioning between scene A and scene B working. Since my players are persistant I need to move the players back to 0, 0 when moving to scene B, I have a script on an object in scene B that does that and replicates it using RPCs across all clients. However, when I try to run this I get the error above. I believe the reason for this is because the network object that is in charge of moving the player is a network object and is not being spawned in. From what I've seen online, the network manager STARTING in scene A should not be a problem as long as I enable scene management, but the script only works if I manually spawn in the object moving the player, which isn't a problem, but I feel like this could get cumbersome down the line. Is there not a way to make it so that objects already in scene for all scenes are automatically managed?

[fringe imp]

does lowering public float MaximumInterpolationTime = 0.1f; hurt performance?

after lowering to .1f there is way less smoothing going on of course (which is great), but not sure whats happening bts and if its going to cause trouble.

[fringe imp]

and i guess just to add on, is there a better way to lighten up the interp amount? I dont want it to be nothing, but the default is too extreme.

[peak pulsar]

Hey. I am getting an error when trying to add Network transform to my co op game
Using Host / client, so no server here. Only happens when I add the Network Transform, otherwise everything works fine (Hosting and joining)

[peak pulsar]

Found the issue! It did not like me deleting scripts based on IsOwner

Destroying scripts**

[tame slate]

Always disable instead of destroy components/scripts when working with NGO.

[peak pulsar]

Aha, thanks for the heads up

I am trying to test this through the internet (not locally), opened port 7777 on my network, but it doesnt seem to work. Put my public IP address in the Unity transport, but I cant join locally or through the internet when doing it like that. Any thougts?

not in the picture, but I toggled Allow Remote Connections

[white pivot]

Helloo

Anyone here used MultiplayerPlaymode? I can't get it to work.

Here's error log :
[MultiplayerPlaymode]: The project directory for [mppmf329d855] could not be found.

• Unity ver : 6000.0.23f
• MPM ver : 1.3.0 & 1.3.1

[peak pulsar]

Scratch that, changed to port 5555 and it worked. Unsure why, not running anything else on 7777

[peak pulsar]

I am using it now and it worked out of the box for me

[white pivot]

Mine stuck like this for ages.

What's your unity ver and MPM ver? May I know?

Nvm, Assets -> Reimport. All fixed the prob so far.

[fringe imp]

any insight on this dylan if u get time?

[tame slate]

What component is this in?

[fringe imp]

this is in the bufferedlinearinterpolater script which sits in the network transform script

basically just want to decrease interpolation amount.

[sharp axle]

Should be fine. You can subclass network transform if you want to override the interpolator

[tame slate]

You'd have to test thoroughly under a wide variety of network conditions. My suspicion is that if it's not exposed to the inspector through NetworkTransform by default, that's for a reason. I would guess that lowering it would make clients with higher latency or packet loss more susceptible to jittering/jumping.

[fringe imp]

gotcha guys, thanks. i think id prefer occasional jump/jitter then the extreme lerping. Ill test under some simulations.

  private void ExtrapolateMovementFromPrevData()
 {
     estimatedPos = networkPos + networkVel * (NetworkTime() - lastUpdateTime);

     // correct pos if error exceeds threshold 
     Vector3 posError = estimatedPos - rb.position;
     if (posError.magnitude > posErrorThreshold)
         rb.position = Vector3.Lerp(rb.position, estimatedPos, Time.fixedDeltaTime * 10);

     rb.linearVelocity = networkVel;
 }```

been working on my own but lost for the most part. Have no idea if im close or not, i send rpc of position and compare with network pos.

[sharp axle]

Network Transform uses custom messages so that's not far off.

[fringe imp]

i have a good rotation one figured out, but dont want to drop a wall of text. Position seems harder as ou want to include velocity

[sharp axle]

syncing physics is going to be hard

[bold hare]

is c# decimal a good idea for network game logic that must be deterministic cross platform? I know float has issues with determinism

[sharp axle]

As far as I know floats are fine for most use cases. Physics being the exception.

[bold hare]

Really? It seems like I am getting different results of computations on different platforms, at least when it comes to rounding to the nearest int. It’s possible it’s another bug, but it doesn’t seem like it

[tame slate]

If you're rounding to the nearest integer and getting different results on different platforms I highly doubt that has anything to do with the precision of float

[bold hare]

I have heard in many places though to avoid the use of floating point math due to non determinism…

[tame slate]

I'm not saying that's incorrect. But, if you're strictly talking about rounding a float to the nearest integer and getting different results, the chances of that happening due to the precision of float are astronomically low

[tame rampart]

I noticed that my stuff syncs but sorta laggy and it looks like the positions are being interpolated, is this some sort of setting somewhere

[tame slate]

Using NGO?

[tame rampart]

yea

[tame slate]

https://docs-multiplayer.unity3d.com/netcode/current/learn/clientside_interpolation/#with-client-side-interpolation

It's recommended and I believe enabled by default to reduce the impact of latency and jitter.

It can be toggled on/off on the NetworkTransform component.

[rapid locust]

does anyone have any thoughts on how to fix this?

[stiff ridge]

Are you using PhotonNetwork.Instantiate to create the networked object?
If it is part of the scene, make sure the object in the scene has a PhotonView ViewId (it's set when >= 1).

[fluid walrus]

it would help to paste the whole stack trace not just the top line, but one thing that immediately looks sus is you're calling Spawn in Awake which will run on the client as well as the server

Awake runs before OnNetworkSpawn which generally is the first event it's safe to assume all the network stuff is initialized properly

how are you instantiating TerrainManager on the server? it's probably better to have it call Spawn there

well the server has to create an instance of it before spawning it right? or Awake would never be called

if you're using NGO's auto scene sync, you don't need to spawn it at all, it'll be spawned automatically if it's part of the scene

otherwise you need to make sure it's only instantiated on the server and is set up as a network prefab

[fluid walrus]

can you see if it's spawned on each side in the inspector? it looks like it's trying to send a RPC before the system is initialized

if it's not spawned, you either need to enable this setting in your network manager config, or you need to delete it from the scene, make it a prefab, and spawn it yourself

[sharp axle]

Make sure that TerrainManager is on a Network Object and is active when the scene loads

[mental kiln]

I've been looking around Netcode for GameObjects and i had a question about authority. When you have a dedicated / listen server everything becomes server-authorative.
For example; if you have an inventory system, the server would have to know all of the player inventories to do the actions.

However my question is, can't you "move the ownership" to the client? I mean, each player has ownership of their inventory and they broadcast the changes to all other clients.

[sharp axle]

You can give Network Variables owner write permissions. But it all still goes through the server/host.

[mental kiln]

Hm. I had webfishing particularly in my mind, where each player has some sort of inventory then they can place their props around.

I guess the clients can call a "SpawnPropServerRpc" with the id of the prop, and the Server spawns the actual transform...

Can you make network spawns predictive somehow ? So a client can instantly spawn it visually, then when later the network object arrives it overwrites it

[sharp axle]

You can use Distributed Authority for client side spawning

[mental kiln]

That is for the topology without a host, right?

[sharp axle]

Right. There is still a Session Owner for things like scene management though

[mental kiln]

I do think that this will make things more complicated than a plain old host session

[sharp axle]

Depends on how far along you are in your game. It should be easier to spawn things and also has built in host migration

[mental kiln]

Not even started a project 🙂 just researching before a decision

[fluid walrus]

can you screenshot what it shows in the NetworkObject inspector?

at runtime i mean

after the error has happened

both i guess if it's happening on both

that doesn't look spawned!

if it was spawned, there wouldn't be a "spawn" button 😛

[sharp axle]

If its a scene object then make double sure that you are using the Network Manager Scene Manager to load the scene

[fluid walrus]

if it's not a spawnable prefab, that won't work

is it in the network prefabs list?

err, you're telling it to spawn in its OnNetworkSpawn method, that will never be called unless it's already spawned

you need to spawn it at some point after the NetworkManager is ready and before the client connects

networkManager.StartHost();
terrainManager.NetworkObject.Spawn();

something like that?

just don't do that on the client

[tame slate]

Not much different than offline development. An object can't Instantiate itself. Same principle basically applies here.

Some other object/script should be responsible for spawning this. Or, if it's needed so early in the lifecycle of the network, it should just be placed in-scene.

Do you have other objects placed in scene that spawn correctly?

this is still the error you're getting?

Where is PlaceTilesServerRpc() called?

[crisp bobcat]

Did anyone get the invite to the Distributed Authroity webinar?

[tame slate]

What calls HighlightCursorOnTilemap()?

Sorry if it's in there, didn't see it

any chance this coroutine runs on Awake or Start?