multiplayer

[half iris]

Now it starts to make sense, thank you very much 😄

[dark parcel]

Yup, if u need to tell server something, server rpc away

[half iris]

bReliable = True```

Then nothing can go wrong 😎 /s

[dark parcel]

When dealing with networking you want to be lightweight as possible

Only send data that you need to send

Sometime it's also compressed

[half iris]

Yea that makes sense, I shall be careful

[lament flax]

depends of what you want to do

yeah xD

im still curious about that

[hoary spear]

Keep in mind you cannalso supplement info client side to avoid replicating it 😄

[half iris]

Yea for sure, but I assume that because this is physics and I am only simulating it on the server, I need to pass this info along, but for anything else, I can keep it client side

[hoary spear]

Yeppyepp

[opal shore]

any1 know what this does?

[quasi tide]

Only renders what the player can see

[lament flax]

Okay ty

But code is still running ?

Is there events called when an actor is rendered/not rendered

[lost inlet]

adds a button to the editor toolbar to allow you to add a player after the PIE session starts, thought the wording there was pretty obvious though

[vagrant grail]

Did that and still only works on the host but not on the client 😬

[hoary spear]

(Also, why branch and not feed the bool directly to the set ignore nodes?)

And have you derived a new child from pc_core?

[vagrant grail]

Already tried that smae issue

[vagrant grail]

yes

[hoary spear]

Do you happen to override the events there ?

[vagrant grail]

i don't think so as I wrote nothing in that child controller yet

[hoary spear]

And child class is ofc set to replicate

[vagrant grail]

yes (it's the case by default, as I guess it's because I derived from the parent class being already set to "Replicate")

[hoary spear]

Should be, yes, just making sure 🙂

[vagrant grail]

that's why I'm so confused as I never encountered somethind like this 😄

Hold on a sec

[hoary spear]

So whats being triggered?

Are the onreps fired in the first place?

[vagrant grail]

On server only yes

[vagrant grail]

I thought the issue was because I was in "Standalone" instead of "Listen Server" but being now on "Listen Server" I can't start the game anymore / transfer to another level for some reason 🥲

[hoary spear]

😆

[vagrant grail]

Pressing the button si doing this, I guess it's not working because only the server can call the "servertravel" command ? 🤔

[lament flax]

You need to call the command on server

[vagrant grail]

can widgets communicate with "gamemode" through an RPC ?

[lament flax]

On listen server it was working because it was probably the server player that executed the command

[lament flax]

Ofc

[hoary spear]

No

[vagrant grail]

🤣

[hoary spear]

Not on the widget itself.

Through a client owned actor, yes

[vagrant grail]

so I can't do in the widget : GetGameMode > Cast to GM_MainMenu > Call "StartGame" RPC > Execute Console Command "servertravel Mansion_Level" ?

[hoary spear]

GetGamemode returns null on anyone not server

As it doesnt exist for them

[lament flax]

Mb i was thinking about GS

Yeah you cant get GM on widget

It existe only on server side

[vagrant grail]

so how should I do that ? Like something like this ? GetController > Cast to "PC_Lobby" > Call Event "Start Game"
And inside Start Game of PC_Lobby > Get the Gamemode > Cast to GM_MainMenu > Call Event Start Game > Execute Console Command "servertravel Mansion_Level ?

[hoary spear]

Get owning controller*

Start game is run on server. Then rest is ok

[vagrant grail]

the person who can start the game is the host so it's technically on the server already

[hoary spear]

Not sure id discriminate amyways but

If you do, dedicates servers dont work f.ex.

[vagrant grail]

true

[hoary spear]

Any progress?

[vagrant grail]

still doesn't work (the Start Game part)

[hoary spear]

Something is really messed up with your controller it seems

Are the casts succeeding ?

Add prints on each step

[vagrant grail]

Ah

Let me fix that

Now it's being called no issue but still no travel to the game level 😬

[hoary spear]

Did you forget the space?

And suffix ?Listen some forum post suggest (doesnt make sense to me but idk)

[vagrant grail]

nope

[vagrant grail]

I havve no clue what your sentence means 😄

[hoary spear]

try appending "?Listen" to the end of the console command for servertravel

so its servertravel Mansion_Level?Listen

[vagrant grail]

still doesn't work

[hoary spear]

any errors in the log?

[vagrant grail]

I don't know 🤷‍♂️

[hoary spear]

guess you gotta figure out the network errors

[vagrant grail]

I have no clue how to figure that out as i never did that 😭

[hoary spear]

Part of the process

[vagrant grail]

Found this but eXi says to uncheck the bool called "Auto Connect to server" but I don't have that in the advanced settings, do you know by any chance where I can find that or if its name changed to something else ? https://forums.unrealengine.com/t/4-14-servertravel-with-more-than-the-server-doesnt-work-in-pie/376392

[vagrant grail]

I already have this Error Handling setup but no error appears on the screen and in the log not details / name of the error is given so it's impossible for me to debug 😦

[hoary spear]

can't you just test in standalone?

to verify ?

[vagrant grail]

netmode or modes ?

[hoary spear]

erh, packaged*

is what i ment

[vagrant grail]

I don't know how to do that, however trying in "Standalone" Mode works perfectly

so that means there's an issue with "New Editor Window (PIE)"

[vagrant grail]

@thin stratus Sorry to ping you but you're the only one I found having this issue (2016 post 😄 ), Did you find a solution since then ? Because you talked about a "Auto Connect to Server" bool to uncheck but can't find it in the Advanced Settings like you mentionned in your post, and the screenshot you posted doesn't work anymore 🥲 ☝️

[rose prawn]

Hi everyone, I'm profiling the network using Unreal Network Insights, and I'm new to this. I've noticed some points where the total size of packages reaches 1,008 bytes. Currently, we're testing two-player multiplayer. These spikes occur when a new player joins, as there are plenty of things being loaded.

My question is, at what point should I be concerned about the total size or the network usage? Is it around 1,000 bytes or 10,000 bytes? What are considered normal ranges for multiplayer? Just to provide some context, I'm working on a 4-player co-op game.

[vagrant grail]

What the heck, why do I have 4 characters in standalone game when in the settings I chose 2 players

[lament flax]

standalone doesnt use PIE settings (its the whole point of standalone, being "detched" from the editor)

there is probably 4 players because its somewhere else in settings

[vagrant grail]

the question is where 😬

[dark edge]

You using the fast array replication?

[rose prawn]

No, I've never used it before.

[dark edge]

I just know it is a thing, if it works as is then it's probably fine, but if it becomes a problem then probably investigate the fast array replication

[rose prawn]

Thanks! I will probably end up using it for building struct and maybe for the inventory. Currently I haven't experienced any issues but I'm looking for some reference point for the limits when it comes to packet size.

[formal solar]

I want to use UGameInstance::GetFirstLocalPlayerController function in blueprint to reliably get the local controller on listen server, problem is I am extremely poorly versed in C++,is there a way to duplicate this function into a blueprint function library (I have created a custom one in my project) and flag it as blueprint implementable?

[fossil spoke]

Thats basically the same thing as using the GetPlayerController(0) node.

[formal solar]

I am following this guide https://wizardcell.com/unreal/multiplayer-tips-and-tricks/ and it says there is a chance that on listen server, local controller will not have index 0

If client connects faster than host

[fossil spoke]

Sure, but UGameInstance::GetFirstLocalPlayerController uses the same functionality.

Eitherway, what you can do

In your BlueprintFunction Library in C++

Create a new function

[formal solar]

The guide says that the game instance version is reliable

[fossil spoke]

That has the same signature

And just return the result of UGameInstance::GetFirstLocalPlayerController

[formal solar]

Im totally new to C++ and I'm confused by the engine code

[fossil spoke]

Dont worry about the engine code

Just focus on making a new function in your function library class

[formal solar]

I have

But Im not sure on syntax and such

[fossil spoke]

Can you paste what you have so far

Make sure to use the code block tags

[formal solar]

My header for the blueprint function library I created, I know to add BlueprintCallable (or should it be BlueprintImplementable) but not after that

[fossil spoke]

Ehhh

[formal solar]

what I think is the function I need but Im confused by the lack of UFUNCTION()

[fossil spoke]

Add this to the header instead

    /** Returns the first locally controlled player controller. */
    UFUNCTION(BlueprintPure, Category="Game", meta=(WorldContext="WorldContextObject"))
    static class APlayerController* GetFirstLocalPlayerController(const UObject* WorldContextObject);

[formal solar]

thank you, do I need anything else in my 'include' list? Like World or such

[fossil spoke]

No

Add this to the cpp

class APlayerController* UCustomBPFL::GetFirstLocalPlayerController(const UObject* WorldContextObject) 
{
    if (UWorld* World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull))
    {
        return World->GetGameInstance()->GetFirstLocalPlayerController(World);
    }
    return nullptr;
}

[formal solar]

Thanks I will try that

[fossil spoke]

You may need to add this include to the cpp

#include "GameFramework/PlayerController.h"

I just edited the above code to include your specific class name in the definition

[formal solar]

yes I think thats why I am getting a not found warning

still got the warning

[fossil spoke]

What do you mean warning?

Warnings wont stop compilation.

Errors do.

There is no point saying "Ive got a warning".

Paste the actual issue so we can help.

We cant see your computer.

[formal solar]

Ok

[formal solar]

Did you definitely mean add this to the cpp file and not the header?

[fossil spoke]

Yes

Show us the code mate.

[fossil spoke]

Ok first up

Ignore the Error Tab

It is useless

Actually compile the code

The Output Tab will tell you if compilation failed

You can then read the actual reason why it failed in that log.

[formal solar]

is compile same as build?

[fossil spoke]

Yes

[indigo brook]

Quick question: How would I hide widget component in the player character. OnlyNoSee isn't working. Any tips? Only for the owning player that is

[fossil spoke]

Set HiddenIngame?

[indigo brook]

Right, but I'd have to find out if it's the owner, then HiddenInGame, how would I find out which players owns the widget?

[fossil spoke]

You have to close the Editor.

[formal solar]

yeah stupid me

[fossil spoke]

If its locally controlled?

[indigo brook]

Yes! I'll try that!

[formal solar]

syntax error I think

[indigo brook]

I can't believe I didn't think of that! That did it! Thanks man!

[fossil spoke]

Why did you screenshot half of it?

Thats really unhelpful.

Paste the entire log

[fossil spoke]

Can you show your code for the cpp file?

[vagrant grail]

anyone please ? ☝️ 😭

[formal solar]

I need an extra } I see in the C++ file

[fossil spoke]

So you didnt copy paste what I had exactly

[formal solar]

no my mistake

default 'build solution' will build all windows you have open yes?

Thank you for the help hugely appreciated, my C++ is embarassing compared to my knowledge of blueprints

[fossil spoke]

If you havent touched C++ before no one can expect you to know what your doing

You should learn it though.

[formal solar]

Yes more transferable skill if anything

[indigo brook]

Next question: How do I get a projectile to ignore owning actor?

[formal solar]

do you mean as in net ownership

[indigo brook]

Well I'm spawning a projectile ball, however it damages the player who spawns it. I'd like it to only damange non-owning players

I figured it out! I had to pass the investigator in the spawn. All good!

[pine cedar]

I have an issue with there being a small delay after attacking another player while on client. Anyway to predict damage on client?

[dark edge]

Are you purposely multicasting the spawning of this projectile and not just spawning a replicated projectile?

[dark edge]

Sure there's ways. It's up to you

it's not automagic

[pine cedar]

How?

[dark edge]

however you want.
Right now I'm assuming you detect the hit on the server, do the damage, then the client eventually finds out right?

There's nothing stopping you from also doing the hit on a client and predicting whatever the hit does

Make no mistake, prediction is INSANELY COMPLICATED

[pine cedar]

I'm pretty much using the gameplay ability system to replicate the montages and attacks hit boxes. The only issue I'm having is the delay between the player being attacked and the attack hitting on client. Not sure if this is a gameplay ability system issue or a multiplayer issue

should I take this to the gameplay ability system chat? or is it a multiplayer issue?

[dark edge]

If you're using GAS then prediction should just be happening if you set it up right

that's GAS chat land tho

[indigo brook]

I'd probably prefer it the way you're suggestion, do you have a screenshot example of what you're talking about?

[dark edge]

just spawn projectile on server only (it's a replicated actor)

that's the typical approach

if you need prediction that's a whole other can of worms

[indigo brook]

I'll adjust, you're not the only one mentioning the heavy use of RPC's that's bad haha. I think it's wise I listen! Thanks for your input!

[dark edge]

RPCing shots CAN be valid, that's what I do

but you have to expect that not everyone will agree on where that bullet is going

whether or not that matters, depends

[heady python]

i have an issue with IsNetRelevantFor. The resturn value is being printed out for both clients. When the players are too far from eachother, they arent relevant to eachother. The function returns the right value, but the clients stay replicated for a few seconds after, which shouldnt happen. when the result is false, the function gets called a lot more, why is this?

[ruby lodge]

How does unreal know which asset to show in multiplayer? Apparently it's not just about the uasset name, it's more like an ID or something inside of an asset I guess?

I am trying to replicate an asset which was mounted at runtime like a chair so it was not there in the initial build. At the moment the client does indeed see that something was created and the collisions of the blueprint work and stuff but it cannot actually see the asset ie. the content that was mounted. The blueprint was already in the build, it just had empty references and got filled from the player who mounted something

Even after mounting the same chair by the other player, he still can't see the one of the server player although he can see his own mounted chair which is the same.

that's why I think it's deeper than only uasset names that unreal relies on to recognize which asset to show

otherwise it would see the connection there and show all chairs of that type when mounted by everyone

[crude finch]

hello! i was wondering how i could go about replicating the left hand IK on a player, everything I try only lets it show on that players end but nobody elses

[supple junco]

Hey is anyone using the common session subsystem from Lyra? It seems to me that the lobby attributes are hardcoded as part of this subsystem and I can't modify or add my own lobby attributes? Since all the variables are set in UCommonSessionSubsystem::CreateOnlineSessionInternalOSSv1

[dark parcel]

Does it need to be replicated? If the calculation is the same, you should be able to see the same result without replication at all.

Take the IK foot for example.

[mild lynx]

On my main Player Pawn, I have a Widget Component with Text that is suppose to Display a Name. I use a Rep Notify to get the name and update it for everybody which works great on a Text Render Component. Inside my Rep Notify, the Widget always fails to Cast. I was wondering how I should go about setting the Widget Text since this is happening.

[dark edge]

is the widget component created at runtime or in editor?

print the value of theat Get User Widget Object, what is it on all the machiens?

[mild lynx]

3 players on Listen Server

[mild lynx]

The Text would be set at Runtime on Begin play with the Rep Notify. The Component itself should already be there because it's on the Pawn Blueprint

The widget class is also already set to the Widget for the Name Tag

[vagrant grail]

Do you have an answer for my question please ? #multiplayer message

[dark parcel]

@mild lynx looks like a rat race. There are times it's empty and times it prints value

Make sure u set the variable before accessing it

[mild lynx]

Here is some more context. On begin play, the Client will eventually call "Server Set Player Name" which is a Server event to check Player State for a Valid ID, then upon success it does what you saw in the above image in the Rep Notify

[dark parcel]

I don't go thru people code. I can only mention what seems to be the problem

U are getting empty object at some point, that's when the cast failed

[mild lynx]

Okay, I'll just try a Valid check and run it through a timer a few times to see if it updates at all then. Thanks for the help anyway.

It seems to just not be Valid for the first tick, but Delay until Next Tick got it working, along with a Timer check for backup.

[sinful tree]

The problem is likely because though you have the widget component on the actor, the widget that is housed within it isn't necessarily created by the time you'd receive the OnRep of the name.

[mild lynx]

Yeah, that makes sense. Luckily this seemed to do the trick. I have the Timer do it's thing every 3 seconds, and if it fails 3 times it just invalidates, so that seems to work

[dark edge]

Another thing you can do is have the widget fetch the name when it wakes up

[mild lynx]

👀 How would I do that?

[dark edge]

No clue, I've literally never once done a server travel

[dark edge]

Assuming you have some way for the widget to know about the pawn it's on, just go get the name when it initializes. Whatever the begin play is for a widget

[mild lynx]

Okay then. I'll try that out sometime, thanks for the Info.

[dark edge]

or, do the same thing you're doing in the repnotify also in the actor's begin play

that way you keep the references flowing one way

Race conditions, welcome to multiplayer

[shrewd carbon]

My host seems to recreate its player controller whenever a client joins my networked lobby is this normal behavior or am I messing something up.

[hoary spear]

Are you sure its not just creating its version of the new players PC?

Server + owning client gets one

[shrewd carbon]

Refactoring it around, it looks like my set view target with blend just seems to be getting reset(?)
I have a lobby where the camera moves around for option menus. Whenever a client joins the lobby, the viewtarget seems to snap back to the original position

[hoary spear]

And you're not doing GetPlayerX(index) i hope 😅

[shrewd carbon]

I have camera actors at the like anchor positions that are tagged,

[hoary spear]

Theres likely on of your issues

You generally shouldnt use GetPlayerX

[shrewd carbon]

What should I use?

[hoary spear]

A proper reference to the correct playerController

[shrewd carbon]

my understanding was that getplayercontroller(0) would get the local player

[hoary spear]

Its not guaranteed afaik

[shrewd carbon]

I guess then what would a proper reference to the correct player controller look like, this is meant to be a client side operation as each client should be able to independently move about the lobby options

[hoary spear]

I guees this is triggered on some beginplay?

[hoary spear]

Either you provide it. Or it already somehow exist in the context of the actor you're on (prob not here)

[shrewd carbon]

yea it is on a begin play :c this specific one is supposed to be the first little landing animation

[hoary spear]

Which actors beginplay?

(Dont say levelBP)

[shrewd carbon]

i've tried it in multiple places.

This specific desperate iteration is indeed in the LevelBP, but I also have tried it in the menu widget blueprint itself.

[hoary spear]

😦

[shrewd carbon]

The only reason its in the LevelBP was becasue I was unsure if it was a replication issue

[hoary spear]

What about in the pc?

[shrewd carbon]

The playercontroller gets recreated each time a client joins, which eludes to my first question

[hoary spear]

Im sure it doesnt

Each new plauer gets their ownn

And server gets a copy of it

So with 4 players:
Server - 4 controllers
Clients - 1 controller each

[shrewd carbon]

I'll try it again, maybe i didn't properly set it up.

[hoary spear]

On beginplay you cam bramch "IsLocallyControlled"

[shrewd carbon]

oh neat ill try that right now

it still seems to happen in the player controller :c

[hoary spear]

Did you remove the old code everywhere?

[shrewd carbon]

yes 🙂

[hoary spear]

Wait wait

Are they all sharing the same camera? 😅

Viewtarget*

[dark edge]

that shouldn't matter right?

[hoary spear]

Not for it resetting i guess

[shrewd carbon]

I dont know what you mean by sharing the same viewtarget. Its my understanding that the playercameramanager is local to the client itself and not replicated.

[dark edge]

what does Setup do?

[shrewd carbon]

Create my lobby ui

I ll remove it to make sure there's no conflict there.

[hoary spear]

Wheres the logic for moving the view target actor?

Or do you lerp between different cameras?

[dark edge]

As long as this is the ONLY thing setting view target right now I see no reason why it wouldn't work

it should start -> delay -> blend towards MenuCamera

does menucamera move or is it completely static?

[shrewd carbon]

menucamera is intended to just be a static anchor camera since blendview target requires an actor at least was my understanding

[dark edge]

does it actually move or do you just not have the camera moving around part hooked up?

are you intending that "Camera moves around" = "view target jumps between different cameras with different tags"
or
"Camera moves around" = "View target is always Camera which is actually moving"

[shrewd carbon]

Here is a video to kind of document the issue

As soon as a client joins, the viewtargets seem to reset to their starting point

The only thing that should be manipulating the viewtarget is this playercontroller blueprint that ive shown above

[dark edge]

maybe it's calling RestartPlayer on everyone due to gamemode shenanigans

don't think so but just thinking out loud

[sinful tree]

That may be a play-in-editor "feature"

[dark edge]

Print Self on BlendToView

[hoary spear]

Gotta love those 😅

[dark edge]

listen or dedicated?

[thin stratus]

The Boolean for auto manage viewtarget is off though, right?

[shrewd carbon]

Listen

[dark edge]

Do this real quick

when 2nd player joins does it do 2 prints or 1

I'd test with launching

not sure how you launch as listen but do that 2x then join one to the other

console -> open localhost should do it I think

[hoary spear]

Its a setting under the play menu

You can select servertype

[dark edge]

i mean launching, independent from editor

[shrewd carbon]

I'm not sure this is my first time using viewtarget like this

[thin stratus]

It's a Boolean on the PlayerController iirc

It's meant to automatically manage the ViewTarget for possessing etc

[hoary spear]

Wierd.. 2 server prints + client print

[shrewd carbon]

It was not off, but turning it off seems to not alleviate the issue

[thin stratus]

Ultimately you don't really want to change your ViewTarget if there is already a pawn or similar that you possess. At that point you would keep the ViewTarget and simply use the PlayerCameraManager to offset the camera to where you want it

If you have no pawn etc yet then it's fine though

I can't see the video on my phone. Did it print twice?

[hoary spear]

3 times

2 on the server and 1 on client

For some odd reason

[thin stratus]

The second server print came when the client joined?

[hoary spear]

Initially it prints twice aswell

[shrewd carbon]

no thats a different print

Server printed once

[hoary spear]

Oh

[shrewd carbon]

client joined, sever printed for client

[dark edge]

Show the actual log

[thin stratus]

Hm would need to see the whole code, including where it's called from etc. too much unknown about the setup

[dark edge]

not the millisecond it's on the screen

also is Use Single Process unchecked in PIE settings?

[thin stratus]

Can only check later. Need to get up first 😅

[hoary spear]

Somethings wrong here

Yellowprint is from that event

[dark edge]

when is ClientsideSetup called?

[shrewd carbon]

yellow is from that event

in begin play

[dark edge]

show the entire chain from whatever event is automatic to that event

[shrewd carbon]

is there a way to clear the log

[dark edge]

yes

right click

[shrewd carbon]

excellent ty

[dark edge]

Hm, is view target a thing that is ever replicated or otherwise server managed? Could be a forced replication?

[shrewd carbon]

LogBlueprintUserMessages: [BP_LobbyGM_C_0] Server: BP_LobbyPlayerController_C_0
LogBlueprintUserMessages: [BP_LobbyPlayerController_C_0] Server: BlendToView called: BP_LobbyPlayerController0
LogBlueprintUserMessages: [BP_LobbyGM_C_0] Server: BP_LobbyPlayerController0
LogBlueprintUserMessages: [BP_LobbyGM_C_0] Server: BP_LobbyPlayerController_C_1
LogBlueprintUserMessages: [BP_LobbyPlayerController_C_0] Client 1: BlendToView called: BP_LobbyPlayerController0
LogBlueprintUserMessages: [BP_LobbyGM_C_0] Server: BP_LobbyPlayerController_C_1

I changed the text because i cant find that other print statement so blentoview is appended to the print

[dark edge]

the gamemode printing isn't helping

[shrewd carbon]

ohhhh

it shows you where it is, let me remove that

LogBlueprintUserMessages: [BP_LobbyPlayerController_C_0] Server: BlendToView called: BP_LobbyPlayerController0
LogBlueprintUserMessages: [BP_LobbyPlayerController_C_0] Client 1: BlendToView called: BP_LobbyPlayerController0

[dark edge]

show all code paths that can call ClientsideSetup though

[dark edge]

is that the whole run?

or just the moment 2nd client joins

why is the server printing

oh nvm that's the listen server

[hoary spear]

But that function is not the culprit

Our code runs only on thenowning client

There's something else going on

[dark edge]

is that EVERY print string for the entire run?

[shrewd carbon]

yes

[dark edge]

why is it the same object both times then

[shrewd carbon]

I'm not sure

[dark edge]

sec, trying to replicate

[dark edge]

what are the errors

[shrewd carbon]

this happens in shipping builds as well so i can confirm the behavior is not PIE

They're errors from removing my UI

[dark edge]

how do you have the add client button?

[shrewd carbon]

you can enable it in earlier 5.x versions in editor properties and "allow late join"

[dark edge]

yeah i just replicated

wtf

[thin stratus]

Same name doesn't mean same object

One of the reasons DisplayName isn't meant for Gameplay

[sinful tree]

I'm not getting the same behavior in 5.2

Default Pawn set to None.

Server (host) joins the game, camera blends to a camera actor in the level after 2 seconds.
I click the "Join Late" button, client window pops up, and after 2 seconds, blends to the same camera actor. Server view unaffected.

[thin stratus]

The camera movement in the video is solely by the view blend, right? It's not some camera track on top of that?

[dark edge]

have you tried join during the blend?

[shrewd carbon]

Nope just blendview

Even after the blend it snaps back to original position

[sinful tree]

Yep works fine as expected... Both server and client has their own view of the scene and are both blending towards the target camera simultaneously but the server is ahead of course 🙂

[thin stratus]

Hm, but Adriel can reproduce it?

Interesting

[dark edge]

video in a second

ok it appears with delay it's fine

without delay, the client misses it

[shrewd carbon]

when my lobby pawn class is set to none it works fine

[sinful tree]

Then it's a possession timing problem.

[shrewd carbon]

what in pawn is causing this to snap back..

[sinful tree]

The possession overrides the blending to the new camera.

But I'm not sure why that would influence the server....

[hoary spear]

But why would that happen for the server ?

Yeah

[dark edge]

I'm not seeing server affected at all

I thought maybe I did at first but I can't replicate that

[shrewd carbon]

I seem to be making progress,

[shrewd carbon]

at the very least im on parity with you guys

my server no longer does it

[hoary spear]

So you and Datura got the same result then

[shrewd carbon]

my lobbypawn had manipulated my camera, i removbed that and now just the client snaps back

[sinful tree]

Yeah same - mine doesn't effect the server snap back, but if there is a default pawn set up then the client doesn't see the blend, it just snaps to their pawn.

[shrewd carbon]

Should I just do this in the pawns begin play so that there's no snap back?

like a local function on the pawn so that this only happens after possession

[hoary spear]

So youd want the evnt connected to onpossess

[dark edge]

What's the goal?

you want what to happen in the lobby

[sinful tree]

Possibly one frame after that even @_@

[hoary spear]

Perhaps

[dark edge]

on possess is clientside anyway right?

[hoary spear]

Depends on where the k2 event is chained

[dark edge]

er serverside

[hoary spear]

Id expect last&^

[shrewd carbon]

the bug at hand was that each time a new client connected, the lobby would snap back, for all players.

ideally each new connected client wouldn't snap back those who were already there, that may be fixed now with making parity with you all

[hoary spear]

Generally Beginplay + multiplayer is a bucket of worms

[dark edge]

Just make your lobby pawn be a thing with a camera that you can move around as normal I'd say

[shrewd carbon]

but also that the new joining client has the transition

probably, but the benefit to blendview was that I assumed this function was for this purpose of blending between camera views.

so I was hoping to use it for this usecase.

[thin stratus]

But the possession ViewTarget stuff comes from the PlayerController Boolean iirc

If that is false then the pawn shouldn't matter

[shrewd carbon]

whoa

Thats it

unchecking the boolean on pc fixes it

[dark edge]

I had it off but still was missing the blend

[shrewd carbon]

😭

[dark edge]

I'd sit at default cam -> snap to final when blend time was over with nothing in between

[thin stratus]

There might be more at hand, but if there is anything resetting ViewTarget then it's that Boolean

[dark edge]

maybe default cam wasn't set up yet so it had nowhere to blend from

[shrewd carbon]

that fixed it for me

[thin stratus]

If it's in the level then it should be available

[shrewd carbon]

🙇‍♂️ The like 6 people that play my game are forever grateful.

[thin stratus]

I can't stress enough that I would use the camera manager for this stuff

[shrewd carbon]

To you as well

[dark edge]

Is there a later event to hook into clientside?
is there an "everything is definetly here and ready to go" event?

[shrewd carbon]

sorry to you as well 🙇‍♂️

[thin stratus]

So both sides now work fine for you? Client and Server?@shrewd carbon

[shrewd carbon]

Yes

[thin stratus]

And solution was no Pawn + Boolean to false?

[hoary spear]

That would be something huh 😅 not afaik

[shrewd carbon]

Unticking automanage and then fixing my lobby pawn from attempting to snap the camera fixed it

[thin stratus]

And what stuff do you dream about at night?

[hoary spear]

Dont forget me 🙂‍↕️

Made you move the logic back to pc lol 😂

[shrewd carbon]

My lobby pawn had a bug which was causing the server camera to snap by attempting to snap

[thin stratus]

Probably better to get yourself some ancient Oracle to read the stars for you than hoping there some everything is ready event

[dark edge]

How do Real Games™️ do it?

[sinful tree]

Looks like what I could do is have a pawn, but set this false.

[shrewd carbon]

Once that was fixed it was the automanager that was set to true -> false that fixed everything

[thin stratus]

Mostly by keeping relevant logic in the classes they belong to

[shrewd carbon]

yes yes. Thank you

[thin stratus]

If you have a race condition you gotta solve it by checking both ways

[hoary spear]

hello there playerArray

[thin stratus]

Lyra I think tried to cover this a bit

[dark edge]

What would the player camera manager approach look like? Do you still get the blending functionality?

or are you having to reinvent blending

[shrewd carbon]

I'm also curious to know what camera manager would look like

[thin stratus]

Yeah you can store the current and the target transform and Lerp between them over time

[shrewd carbon]

the whole point was to avoid reinventing blending as im not sure i could do it better.

[thin stratus]

Fwiw even with custom curves etc

Depends on the effort you want to put into

[hoary spear]

Theres one bp event for doing this

But id recommend doing it natively

[thin stratus]

In c++ you can probably just use the existing blending logic fwiw

But blending isn't really difficult tbh

[dark edge]

So now the question is, why isn't the blending functionality in the camera manager to begin with

[shrewd carbon]

i imagine its not just a linear blend between values

[hoary spear]

Depends, id say

[thin stratus]

The benefit of keeping the ViewTarget on the Pawn

Cause some logic in UE somewhat requires that

[dark edge]

which is hilarious

[thin stratus]

I found that out the hard way when having a second actor for the camera years ago

E.g. OnlyOwnerSee etc stops functioning

[hoary spear]

Brave soul, you have

[dark edge]

I'd go back to the subscription model for an Unreal Engine 5 Lite

[thin stratus]

Yeah that was like 6 to 8 years

[shrewd carbon]

Well. Regardless, I appreciate the help

[thin stratus]

I can look at it in a minute

[shrewd carbon]

this was really confusing my players :sob

[dark edge]

Hey at least you got players, that's better than most of us here.

[thin stratus]

The blend logic is not more than the PC telling the PCM (iirc) that it wants a blend. And then it just blends over time to the actor you specified.

[dark edge]

who holds the 2 states you're blending between?

[thin stratus]

Would need to check. Guess is PCM

[dark edge]

If that's the case then it's not as insane as I thought, that's the PCM doing the blend and the PC just commanding it

[thin stratus]

Yeah

[shrewd carbon]

I saw that in cpp, i didn't know if i should mess with calling it directly.

[thin stratus]

Don't ask me why the function is on the pc

[hoary spear]

I thought that was already how it worked

[thin stratus]

I would think potentially for possession etc.

[hoary spear]

Pc just had a forwarder function...

[shrewd carbon]

ima sleep so good tonight this was driving me crazy. such a small thing too in the grand scheme.

[rocky kestrel]

Hello, I have lots of actors in my level that are not important for game. I want those actors be only locally loaded so server would not know about those. Those are like level design actors so those are already in level. What is correct way to remove those from dedicated server?

And those are small collectable robots. I have over 1k of those on level and I don't want to use server cpu at all for those

[lament flax]

why do you want your server to not know about those collectable robots ?

[thin stratus]

Has anyone done Steam Stat based Achievements in C++? I looked at what people did in BPs, and checked the WriteLeaderboards node, but doing the (at least I believe I do the same), doesn't seem to work. It fails finding a Leaderboard (does one need to set up a Leaderboard on steamworks too?) and then the Steam Task stuff kinda hangs up.

[chrome bay]

Been a really long time since I did anything with it but IIRC, the default Steam OSS implementation requires that you setup a leaderboard for every accumulation based achievement on the steam backend. Either that or a user stat, can't remember which.

[thin stratus]

Yeah the BP node also fails. I think the Client doesn't have a Leaderboard for their stat

I will ask them to set one up.

[hoary spear]

did you find the "late join" setting ?=

for the additional button

[tardy fossil]

question: setting a replicated variable to COND_InitialOnly will take it off the list of replicated variables that need to be checked and save some performance right? if i have some replicated variables that change ONLY due to server events, would it be more optimal to set that variable set to COND_InitialOnly and update its value with a RPC multicast?

[chrome bay]

Unless you have an obscenely expensive comparison to perform then the difference will likely be utterly unmeasurable

If you want to save performance then drop the update frequency of the actor and reduce the number of replicated objects you have

[tardy fossil]

yeah i kinda figured that was the case.. i think the right answer is to utilize dormancy and force net updates

[chrome bay]

dormancy is certainly an option if it's changing very infrequently

[vagrant grail]

@thin stratus Any help please ? You're my last hope 🥲 #multiplayer message

@sinful tree Do you have any solution please ? 🙏 ☝️

[thin stratus]

Might be the "Launch Separate Server" boolean by now?

[vagrant grail]

On my side it's already set to off but still have the issue 😬

[vagrant grail]

You're the best ! ❤️

[thin stratus]

If it's off then it will probably already connect

[vagrant grail]

I turned it "on" and it works 🤷‍♂️

[visual mountain]

How would one assign a player controller to a player in unreal engine blueprint. I have a listen server and both players start with an initial controller, but ive made 2 of my own controllers. to better be identified for turn rotation.

currently the players possess the pawns I want them to, but im not sure, nor is the internet being very helpful atm for explaining how to assign other Player Controllers in blueprint.

[vagrant grail]

https://www.reddit.com/r/unrealengine/comments/xc0i5h/switching_between_player_controllers/

[visual mountain]

ha literally just read that. thanks for the reply. Though now i question how the unreal devs make an array of player controllers for multiplayer.

[vagrant grail]

what do you mean ?

[visual mountain]

last thing, is this a valid alternative for identifying the players? can i just use these tags ive made and derive the player controllers from them

apparently unreal makes a player controller array and assigns the controller to the player as they start, or possibly during some level transition, im not sure.

as long as ive got a valid means to identify a controller in blueprint im good.

[vagrant grail]

You can do that like this

[elfin holly]

Hey.

For some reason the WidgetInteraction component breaks whenever a client joins. I'm assuming its because of the pointer index or the virtual user index However I've so far failed to assign the player index to those values and get it working. Any tips suggestions? thanks 🙂

[half iris]

So at what point do we stop executing functionality on the server after a Run on Server RPC? Is it until we call a run on owning client RPC in the same line of execution? Or do we just break the line of execution with a custom event at some point?

[upbeat basin]

Any function/event you call on an RPC will continue execution on that computer until you explicitly call another RPC

[half iris]

Gotcha. So if I have something like Server RPC -> Some functionality (this happens on server) -> Run on Owning client RPC -> Some functionality (This happens on client again).

Do I understand it correctly this way?

[upbeat basin]

Well if you mean a chain of white execution pin with your example, no. The functionality after the client RPC will also run on server

The functionality inside the client RPC you implement will run on the client only

[half iris]

Right, so instead of my earlier example;

Server RPC 1 -> Some functionality (this happens on server) -> Run on Owning client RPC 1 -> Some functionality (this happens on server).

Event Run on Owning Client RPC 1 -> Some functionality (This happens on the owning client).

[upbeat basin]

Yep, that's it

[half iris]

Right gotcha, that makes sense now. Thanks for the clear explanation!

[vagrant grail]

why does this not apply to the client ?

[ruby lodge]

Good day, I am trying to understand how unreal handles references and knows what to display exactly because apparently it's not the asset names. First a bit of context, I am trying to replicate a pak mounted chair which was mounted by server and client. It is the same pak file so if references were built upon asset names, then it would have worked but apparently each asset has a serialization ID and a GUID? Now when mounting the pak on server and client the assets apparently have different IDs and thus the engine doesn't know that these are actually the same assets. Right now, the chair does get spawned on the server but is invisible to the client. The client does recognize that there was a blueprint spawned and sees it's other functionalities but the assets inside the pak which were mounted like the static mesh, textures etc are invisible to him although he mounted it as well.

[hoary spear]

I like drawing flowcharts to help keep my thoughts straight

Can be hard to juggle it all at times

Ugly as they might be, they help me a ton

[half iris]

That is really handy, I will be using this as well

[quasi tide]

Yeah, but effort 😭

[hoary spear]

If only something in the engine could map this outm..

Editor toool hmmmmmmm

[vagrant grail]

any help Squize please ? 😄 I'm stuck on this for days 🥲 #multiplayer message

[hoary spear]

wth 😮

IgnoreMoveInput = FMath::Max(IgnoreMoveInput + (bNewMoveInput ? +1 : -1), 0);

so there's a stack of ignore move xD

Sorry Diversity, I'm stuck debugging my own stuff 😛

race conditions are fun

[vagrant grail]

ok 😭

[hoary spear]

gotta get used to finding the way, there's a lot of hurdles coming your way xD

[vagrant grail]

there are too much in a small period of time 🥲 And i tried everything, using the HasAuthority node, tried using an RPC, tries doing it in GameMode, trying doing it in PlayerController, nothing worked and it makes no sense 🥲

[hoary spear]

Its usually not about trying everything, but understanding whats going on

[vagrant grail]

I tried but it doesn't make any sense, as it's supposed to work the way I set that up

[hoary spear]

so, move input is not ignored?

or are you using something else than move input? 😛

[vagrant grail]

yeah

[vagrant grail]

I'm using Ignore Move Input and Ignore Look Input, both work on the host but not on the joigning client

I tried doing that through a RepNotify variable, didn't work. Tried directly calling "Ignore Move Input" and "ignore Look Input" it doesn't work either.

[maiden flame]

If you print string, is Event BeginPlay called on the client? @vagrant grail

[vagrant grail]

where exactly ? 🙂

[hoary spear]

after your beginplay event?

[vagrant grail]

in wich class 😄

[hoary spear]

Which one are we troubleshotting 🫠

[hoary spear]

☝️

[vagrant grail]

there are multiple, either the gamemode, either the player controller, and as I have parents and children classes we need to know which one we're talking about 🤣

[hoary spear]

Pc_werewolf

[hoary spear]

whats in the parents beginplay ? do you have anything else modifying move input?

add on event tick -> IsMoveInputIgnored()?

[wanton bear]

what is the proper way to make the player control rotation set to the pawns rotation on possession?

setting control rotation directly using event receive restarted and event possessed with a rep notify ends up with a frame where the rotation is the wrong direction before then being changed

[vagrant grail]

besides what's inside the OnReps no

[lament flax]

you mean, translating code to flowcharts ?

[lament flax]

whats your issue

[hoary spear]

Yes, specifically just following function calls across rpc's and whatnotn

So a chart could show if you're on server or not

Or perhaps the Exec lines indicate

[lament flax]

that would be cool

[hoary spear]

Wether you are server/Client or both

[lament flax]

its a bit like visual scripting but a bigger point of view

[hoary spear]

Yepp, zoom out a step

[lament flax]

thats a thing i would love to dev

if i knew how to dev graphs in custom editor windows

[lament flax]

whats your issue Diversity

so i can try to help you

[vagrant grail]

I'm trying to disable movement and look input for players when they join the Mansion_Level. It does work on the host player but not on the client joining and i don't understand why

[lament flax]

okay

you are trying to disable it from where ?

or what do you prefer

[vagrant grail]

the gamemode

[lament flax]

what target do you need when disable movement ?

Character Component ?

[vagrant grail]

Nope, Player Controller

[lament flax]

okay

can you get the player states array in game mode ?

try to type something like "get players"

[vagrant grail]

why ?

[lament flax]

to see if you can get the players from GM

[vagrant grail]

Like I already have an array of player controllers

[lament flax]

i couldnt guess that

so, you tried to run on server an event to disable movement from those refs ?

[vagrant grail]

Let me show you what I tried to do at first

[vagrant grail]

At first I tried like this but it doesn't work

[lament flax]

maybe this has to be run on client and not server

[vagrant grail]

The PlayerController is set to replicated, so changing the value of those variables on the server would apply to both server and client

[lament flax]

whats is called when you start your game ?

[vagrant grail]

from where ?

[wanton bear]

anyone? only solution ive found is to unpossess the old pawn on the server, then set the control rotation on the client, then rpc back to server to possess the new pawn

[lament flax]

i mean, show me what is printed

[lament flax]

can you move ?

[vagrant grail]

On the server no, on the client yes

[lament flax]

where is this called

[dark parcel]

@wanton bear onAcknowledgePossesion runs on client

You can set control rotation there

[wanton bear]

thanks summer

[snow trail]

GameModes are server only
they do not exist on the client

[vagrant grail]

But couldn't the gamemode call the RepNotify on the server that will then replicate to the client ?

[jolly nymph]

Hi guys maybe some one know, about a Videogame or software or pluggin or blueprint that let me connect one or more virtual reality device to a PC, the PC is the server and VR are the clients?

[vagrant grail]

@lament flax @hoary spear I fixed the issue 😤

[hoary spear]

What was it

[vagrant grail]

On the player character I had a "Set Input Mode Game Only" that was overriding the ignore input

[hoary spear]

Lol 😅

[vagrant grail]

Yeah 😤

[opal shore]

Can we rep notify custom structs/types?requires setup?

[hoary spear]

Can usually, yes

Maps and sets dont replicate

Bpndoesnt give you per var control (and all bp structs should be replaced by sane c++ ones)

[obtuse field]

What is the difference between FInternetAddr and FIPv4Endpoint?

[sinful tree]

https://docs.unrealengine.com/4.27/en-US/API/Runtime/Sockets/FInternetAddr/
https://docs.unrealengine.com/4.27/en-US/API/Runtime/Networking/Interfaces/IPv4/FIPv4Endpoint/

[fossil spoke]

At a glance, it seems a significant difference is that FInternetAddr has support for port information.

Whereas IPv4 does not.

Which makes sense.

[obtuse field]

Are you sure you looked at Ipv4Endpoint, and not Ipv4Address?

[fossil spoke]

Ah, my bad

I misread.

[obtuse field]

happens

Both have support for port and address, and hence my confusion

[fossil spoke]

InternetAddr is likely there to support either v4 and/or v6 addresses

🤷

[vagrant grail]

Is there an event or something that gives a signal to say that all the player from the previous level were all transferred ?

[fossil stag]

maybe some one know, about a VR Videogame or software or pluggin or blueprint that let me connect one or more virtual reality device to a PC? , the PC is the server and VR de ices are the clients

[glad robin]

I don't have the best understanding with, but say if I had:
UPROPERTY(ReplicatedUsing=OnRep_Number) int Number; and the associated OnRep_Number().
If a client changes this value the OnRep_Number() will not be called on everyone whereas if server sets it then other clients will run, am I correct?

[fossil spoke]

OnRep is only automatically called on Clients if the value is changed on the Server.

The server side code must manually call OnRep in C++

[glad robin]

Ok I was correct in my understanding then thanks aha

[maiden flame]

Maybe just check if the same amount of players is in the game level as there were in the lobby?

[sinful tree]

Not sure if this is the proper solution, but maybe have the constructor call an event/function similar to like how Begin Play works, and then check if it's running on the client? From that begin play you can have your object locate and communicate with whatever you want it to. The alternative that I can think of is holding an OnRep reference you set in whatever is creating the object, assuming it is replicated. I believe the OnRep will fire when the object is successfully created on the client giving the client a valid reference.

[native tapir]

During Seamless Travel, the owner of the Inventory Object changed (because Controller is changed.) Despite changing the Outer in the SeamlessTravelTo function, does anyone know why the replication of the Inventory Object does not work?

[lament flax]

on the "lobby controller", on server side, is the inventory data correct ?

[native tapir]

Yes all data is valid.

[lament flax]

mh

maybe UE does a specia lthing that make the client not updating its value from server

is your inventory a variable , struct ? ACBP ?

[native tapir]

UObject

[lament flax]

so inside this UObject, you got vars ?

to store your items and stuff

[native tapir]

Yeah I have several variables to store item and those are replicated.

[lament flax]

maybe set them to repnotify

and test travel

[native tapir]

repnotify is not triggering and Inventory is just null

[lament flax]

maybe the inventory is build before client, so when server sets the inventory vars, he got no clients to replicate to

[lament flax]

weird

[native tapir]

I think that's true.

But I don't know how to set client's inventory that doesn't constructed? Controller yet. (Because PlayerController has InventoryComponent)

[lament flax]

i would try this :

after travel :

client side :

• on beginplay, ask server for inventory data

server side :

• event : return data

--
this would be a fix to get back data after travel, but you would need to check if after the travel, if you update your inventory, if the clients get updates by its own with replication

[native tapir]

Okay I will try this

[lament flax]

im not a MP pro, but this is the only idea i got rn

[upbeat basin]

Did you implement functions required to replicate the UObject?

[chilly haven]

Hi,
Do dev teams generally split up code into modules (Server, Client, Shared), or folders?

I'm leaning towards modules

[upbeat basin]

Splitting up into modules is a way but not like splitting between server client and shared

I think it's more common to name your modules for your mechanics/systems

[hoary spear]

InventoryCore, InventoryEditor

[upbeat basin]

Like you can have an inventory module (I mean basically folders by modules) where you can have your Inventory component to add to your player, your Actor class that can represent actors in the world that can get into your inventory (I would prefer another component here but just giving an example) and your widget which would display on owning client to show your inventory content

All in a single module/folder which includes all server and client side code

At least that's what I would do

[hoary spear]

Bp separation/clear intent can be improved by decorating your ndoes with BlueprintAuthorityOnly and BlueprintCosmeticOnly

For the networking part ^

[chilly haven]

In my case I am plannng on supporting only dedicated server and dedicated client, i.e. no listen server.
So I don't want the server or client to contain any network code that is not shared.
So maximizing the separattion has a lot of appeal.

[lament flax]

well you cant really "split", for example, your BP PlayerCharacter will be 1 asset, and server and client side code will be inside

but you can create subgraph for server only stuff and client only stuff

[chilly haven]

That's a shared module. But there is also server-only code, client-only code.

[lament flax]

personally, i like adding "On Client" and "On Server" at the end of my interfaces/events/functions names so i can clearly see what is used where

[chilly haven]

Ideally you don't expose code that is not needed

[lament flax]

yes

but you canr create a BP PlayerCharacter for server, and another PlayerCharacter for client

it will be the same PlayerCharacter for both, but each server and client will have an instance

[chilly haven]

For example, since I am not supporting single player or listen server, I can move the gamemode class into a server module

[lament flax]

GameMode is always server only anyways

its not replicated to clients

[chilly haven]

I'm talking about exposing your code to players. Don't even put it in the exe.

[lament flax]

i think im misunderstanding what you call a "server module"

[chilly haven]

oh maybe. I mean the uproject segregation

"UE modules" as opposed to code modules

[lament flax]

i see now

not my thing so forget all i said previously, i dont want to tell you mistakes

[chilly haven]

haha np

[lament flax]

im a BP only dev so modules arent something i touch on a daily basics

[chilly haven]

Most people support single-player or listen servers, so they don't have the option to not ship server-only code

[lament flax]

im working on a dedicated only game to, but maybe adding support for self hosting depending on the project plan

[chilly haven]

ideally you decide in advance, because ideally you would do things differently

If only dedicated server, you can make it more secure (less hackable) and simpler code

[dark edge]

dedicated only but also bp only?

[lament flax]

for now im doing great with BP only, i will have to dive in cpp at some point

[chilly haven]

I'm the opposite, avoid BP as much as i can!

[lament flax]

yes, i did some researchs

basically, with a listen server you would add more checks than just a "switch on authority"

ofc im not talking about the security part

im still new to MP

[chilly haven]

Yeah most secure is if the server code is not shipped to the players

[lament flax]

i prefer having dedicated server; and player can create sessions on it
a bit like creating private matchs of FPS

its a fake "self hosted" server

[chilly haven]

yup if you can bear the hosting cost

[lament flax]

but on project launch, when i'll see the costs of servers, i might do a beta launch with support of self hosting server using steam API

and if its going great, level up to dedicated servers

[chilly haven]

Self-hosting means code is more complicated because you have to support the case of a server that is also a client. Kinda a PITA.

[lament flax]

yes

more work for me

[chilly haven]

I'm already supporting listen servers and dedi but thinking of dropping listen

[lament flax]

but, if i can avoir paying a ton of money each months for dedicated servers, why not

its only a money decision for me

if i have infinite budget i'll go dedicated

[chilly haven]

self hosting still means players must tackle port forwarding etc

[lament flax]

steam already handles that right ?

any player can easily create a session and invite friends

[chilly haven]

Hmmm not sure. Normally done on your router

[lament flax]

hosted on player host machine

and steam API help with the server replication

[chilly haven]

unless all the network traffic passes through a central hub?

[lament flax]

i guess i have to do more researchs

[chilly haven]

me too lol

[lament flax]

from memory, there is not cost when using listen server on steam API

*no money cost

its the big advantage of steam

[chilly haven]

ima ask chatgpt

[lament flax]

its why small devs do listen servers games, because they have no fees with hosting

[chilly haven]

I think AWS has a free tier? to get you started

[lament flax]

yes but its a temp free

like a year free

[chilly haven]

oh. well 1 year to make your game succeed 🙂

I thought it was size based

So chatgpt says Unreal has no built-in support for port forwarding

[lament flax]

mh

there is marketplace plugins for STEAM API

maybe they have some solutions

[lament flax]

true, but i never used AWS so im scared of the infrastructure

[chilly haven]

looks like steam has some functionality to faciltate player hosting

player-hosted servers are always second best though

[lament flax]

i found this guy docs about a plugin using steam API
it handles dedicated server and listen server

https://steamcore-pro.eeldev.com/

[chilly haven]

Perhaps take a look at Playfab for dedi hosting. Also has a free tier. Supposed to make it simpler.

[lament flax]

seems great, ty

[chilly haven]

or AWS GameLift. Something similar I think

I suspect playfab preferred for small teams.

ChatGPT: "PlayFab has an official plugin available on the Unreal Marketplace"

BTW most dedis are linux, usually cheaper. More work to support.

[maiden flame]

I thought Unreal Engine did not include server-side code in the packaged client configuration (dedicated servers).
I don't have a good source to back it up, so if anyone knows how this is handled by the engine, I would like to know.

[chilly haven]

Oh probably via the server/client defines

[tardy fossil]

yeah you've gotta build the dedicated server seperately

so it can strip out all the unneeded stuff the dedicated server wont use

[chilly haven]

@tardy fossil what do you think of the idea of splitting code into Client, Server, Shared UE modules?

to keep stuff as independent as possible

[lost inlet]

not really fond of plugins like this since it leads to vendor lock-in

it's the whole reason the online subsystem abstraction exists

[lament flax]

i understand

[tardy fossil]

i'd say that is up to personal preference. i personally dont split that up and just use mixtures of HasAuthority() and IsLocallyOwned() (or IsLocallyViewed() when dealing with AI) to make the logic do what it needs to

[chilly haven]

Yeah I meant for classes that exist on dedi or client or both. For shared classes you still need branching logic.

I tend to have GameMode create various manager classes, which are all dedi only

Guess I will try splitting it this way, see how it turns out

[lost inlet]

I've had client and server only game modules on a project before but they didn't get that much use

[chilly haven]

It's nice to be clear about which classes exist in which contexts. A looser option is folders.

[tardy fossil]

id say it depends a lot on the type of game too, like if your server does a lot of server only logic that doesn't exist on clients then yea it makes sense to split that up

[lost inlet]

yes, which is achievable through runtime conditions, but once you start having things like BP references that rely on client and server only modules, it can be more trouble than it's worth

[chilly haven]

Most of the backend stuff will probably be on the server too

[chilly haven]

I don't do much wth BPs lol. Solo dev.

[lost inlet]

well you should be because even data only BPs are a critical part of unreal workflow

on that previous project, the split modules had the voice chat implementation since for Vivox the client and server were doing very different things

[hardy turtle]

hey guys does anybody know if i can set the gamemode i'm in "listen" without reloading it?

[chilly haven]

I think I prefer ini files for data rather than BP variables

for many cases

[quasi wyvern]

whats the easiest way to retrieve the local ip adress via blueprint?

[lost inlet]

I'd be very surprised if that's readily exposed to BP, why?

[true stream]

is replicating movement expensive?

it would solve a few things, but I can work around it if it is. (many actors)

[upbeat basin]

What would be the workaround for this?

[true stream]

I just ~~send ~~replicate the speed, and each client takes care of the movement.

[upbeat basin]

I don't know the answer of if it is or how much it is. But I use it without consideration to be honest. I have many actors that can be added to inventory, which requires to replicate the movement due to add/drop operations, so anyone can add the item to their inventory again. Didn't have any problems so far but I don't know if there is a risk in the future

[true stream]

right, in my case the game Im making its a sort of RTS so the units move every tick.

so I imagine it might have some overhead

[upbeat basin]

Hmm I'm not using it for that kind of movement

[true stream]

also, if you know, how can I profile these kind of things?

so I can check if Im abusing the network

or if you know of a guide of sorts

[upbeat basin]

It's been a long time since I used this so I don't remember the gists and how tos but you can record your gameplay and check what are causing an overhead in the networking with this, just like the CPU and GPU profiler. I don't know if there is any more recommended thing though

https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Networking/NetworkProfiler/

[true stream]

oh cool Ill check it out

[gloomy tiger]

How do I get the final packet size a struct gets after serialization? Been trying FArchive's TotalSize(), but it seems it returns me -1 regardless (its implementation seems to be a INDEX_NONE)

[muted reef]

Anyone worked before on sitting movement ?

[sonic obsidian]

Hey all I'm working on a multiplayer project and I found out about the replication graph and was wondering if I would need it I'm going to have 30 people in each server (dedicated server) and how important is network bandwidth in a mp game I also heard somewhere that rep notifys should be used as much as possible instead of RPC's is this true?

[muted reef]

Yes 💯

[limpid parcel]

with 30 people, bandwidth is pretty important so the game feels responsive for the player

[dusty void]

^

[hoary spear]

^

[dusty void]

also yeah rep notifies should be used where it can be implemented but it ONLY replicates variable value changes from server to client, not the other way around, so if you need to implement some sort of client prediction/server correcting to make the game feel responsive, rpc's would be the way for it, there's a lot more to it tbh & hopefully someone with a whole lot more experience can correct me if i said anything wrong

[lost inlet]

though rep graph will be old hat by the time Iris is more stable

[hoary spear]

Is the gains that significant tho.

[dusty void]

it's what fortnite uses for their battle royale so it looks pretty significant considering fortnite is a very competitive game where that kind of optimization is important

[hoary spear]

I suppose they havnt shared any stats about its perf in fortnite ?

[dusty void]

not too sure, im just glad it works with the current replication system in projects rn

[hoary spear]

Surely its not just flipping a switch?

[lost inlet]

the whole point was to reimplement replication from the ground up with an emphasis on performance

just the CPU load of the current replication system can get out of hand pretty quickly

[sonic obsidian]

Appreciate all the advice guys I'll start learning about the replication graph also heard about significance manager seams interesting too thanks once again.

[hoary spear]

Right, makes sense so far. But have they released any numbers on it ? Sureley fortnite managed with rep graph(?) And switching to iris didnt increase their playercount so...

Makes me wonder

[lost inlet]

but the motivation is likely to increase server density not player count

[hoary spear]

Fair enough, tho a stresstest would be cool

[ruby ruin]

Is there something special I need to do to get ENetDormancy::DormantAll to work?

ENetDormancy::Initial seems to work, but after flushing the net dormancy I would like to return back to dormant which won't work with Initial, and DormantAll seems to be the way for this to work, however, it does nothing. If I have an actor as DormantAll it will continue to replicate normally. Anyone know what's up with that?

[fierce egret]

In Begin Play, I attach an armour to AI_Enemy and set Leader Pose with multicast. Since the client is late in the game, Leader Pose with multicast does not work on the client, armor only attaches to the socket. If I use Delay, the problem goes away, but this is not the solution. How can I prevent this?
(first screenshot is server,
second screenshot is client which joins game late)

[hoary spear]

Repnotify is your friend.

Beginplay and network is not, at all

And rpc's doesnt reach late joiners

They only reach those who are already there, and relevant

[fierce egret]

How can I use Repnotify in this situation? Should I create a array called Attached Meshes and use attach functions in it?

[hoary spear]

Thats one way, Yes

You need a variable for the mesh(es)

And update this on the server

Mark it as rep notify

Then in the function you set the mesh to the variable mesh, and set leader pose comp

Test it first with single skel mesh ref, and go from there 🙂

[half iris]

If I am doing physics simulation for an actor on the server side, I can disable physics on the client side right? On BeginPlay do a Switch has Authority, and set physics sim based on that?

[hoary spear]

Afaik physics simulation is... troublesome

Undetermimistic and such(?)

[half iris]

Yea I have been hearing that from more people 😅

[hoary spear]

So your best bet is prob server simulation with clients simply interpolating transforms or smth

[half iris]

Yea that is what I am doing at the moment, but then I realised that at the moment the client is still simulating physics (because it is default true for this actor). So if i on beginplay check if this actor is running on the client, and then turn off physics for it, it should be fine right?

Oh my, I just tested it, and it works like a charm 🤩

Aside from the small bit of rubberbanding because of the delay between server and client, it looks much smoother now that the clients dont care about physics at all

[hoary spear]

You can likely add some prediction

To avoid most of the rubberbanding

[gloomy tiger]

Bump

[fierce egret]

Hi, its me again
Is it normal that RepNotify doesnt trigger when i add something to array?

It triggers only when i set array

[hoary spear]

Yes

😕

I prefer regular vars when its just a few

It doesnt support delta replication either i've heard so...

[gloomy tiger]

If you really want that, you'd have to implement Fast Arrays - that requires C++

[chrome bay]

It will trigger whenever it's modified. Adding, Removing, if the data inside it changes etc.

[hoary spear]

You positive about that? Not the first time ive heard one gotta set the array to trigger it

This is bp land

[chrome bay]

BP RepNotifies are a massive shitty hack so that doesn't shock me

But yea, I guess if it's Blueprint, you aren't modifying the array FProperty directly so it won't give you that fake "rep notify" callback that isn't even a rep notify callback.

How do people do anything multiplayer in Blueprint honestly

[cursive steeple]

it does need to be set directly for the BP onrep, at least in 4.27 when I still used BPs for multiplayer, idk about UE5...probly still quite some spaghetti

[hoary spear]

Is it enough to set it to self ?

[chrome bay]

Blueprint networking is a meme.

[hoary spear]

Here i was planning my full blown rts in bp

[cursive steeple]

yes

[cinder quartz]

It is a meme mostly because it begs for C++ for everything. Though singleplayer games are fine being mostly BPs, I don't think any game can function decently with 100% BPs if they have multiplayer.

[hoary spear]

Depends om the game

Some multiplayer card game is probably working just fine

[gloomy tiger]

I have some bIsPushedBased = true; properties and would like to run some cleanup just after they got sent to clients (I don't care when they received them, just want to run this cleanup on the server after the server has done its task of dispatching these properties via the network). That said, is there any way I can "intercept" the replication frame? (Talking about some kind of OnPostReplicated)

[ruby ruin]

Is there something special I need to do to get ENetDormancy::DormantAll to work?

ENetDormancy::Initial seems to work, but after flushing the net dormancy I would like to return back to dormant which won't work with Initial, and DormantAll seems to be the way for this to work, however, it does nothing. If I have an actor as DormantAll it will continue to replicate normally as if it were set to Awake. Anyone know what's up with that?

[half iris]

As in using the current velocity and direction to determine where it is going to be in the next frame?

[hoary spear]

something like that, yeah

[half iris]

Right okay, I might give that a shot as some polish after I have done some more playtests to see how bothersome it is for the players 🙂

[hoary spear]

thats the sane way to go about it 😛

try with some emulated lag

[half iris]

Ooooh, how would I go about doing this? Just setting delays on the server RPCS?

[hoary spear]

xD

no

[half iris]

😮

Very cool

Gonna forget about my current task and look at this instead

[hoary spear]

haha

Is it ok with logic inside GetLifetimeReplicatedProps ?

feels like there shouldnt be any, but I kinda need there to be

Perhaps I should just subclass it and override for the specific one...

Sounds cleaner that way

[lament flax]

🫠

[maiden flame]

It's not bad imo

[maiden flame]

Squize, you just sent his replicated physics to the shadow realm

[halcyon totem]

is itbad practce to cast to the game mode from the player controller so to get game modes enums for spawn? I wanted to just add a varible to the event but it gets access none so I figure casting to the game mode to get the actual game mode would help?

[gloomy tiger]

no, you can safely do it - i mean, it's not a bad practice

[halcyon totem]

thanks

is casting to the game state and player state in the player cotnroller also ok?

[fossil spoke]

Casting is fine, where ever you need to do it. Why do you think its inappropriate?

[lament flax]

what would be the best way for the game state to update a blackboard key ?

[fossil spoke]

Thats not really a #multiplayer question? #gameplay-ai would probably be a better place to ask.

[lament flax]

well, idk if MP changes something so i wanted to ask here first

for instances, can a client change a BB key ?

[fossil spoke]

It doesnt? Behavior Trees are run on the Server.

[lament flax]

does the BB keys have same rules than replicated BP vars

[lament flax]

okay good

[fossil spoke]

No

Ask in #gameplay-ai ?

[lament flax]

do they "exist" on client side ?

like, if i try to get a ref, will it be null or valid ?

[fossil spoke]

How would you though?

Think about what class executes a Behavior Tree

[lament flax]

the AI controller ?

you mean its only existing on server ?

[fossil spoke]

Sure, so then to access a BT you need access to the AI Controller, right?

[lament flax]

okay so yeah no clients can get the BB

[fossil spoke]

Clients dont have access to AI Controllers, because they only exist on the Server.

Therefore, Clients have no access to the BTs

[lament flax]

i understand your point now

[fossil spoke]

Awesome.

[lament flax]

didnt knew that AIC was not replicated to client

(which makes sens)

[fossil spoke]

The only controller type that exists for a Client

Is that Clients PlayerController

No other controller is Client side

[wary marsh]

Anyone know if the GMC plug-in would be useful for someone with limited MP experience to make a kind of fighting game? Not exactly a classic fighting game but something that would require pretty fast input response. Or would looking into something more along the lines of snap net be good.

For a bit more context, I'm currently replicating a root motion montage of a forward roll in a mostly BP project, and with simulated average lag is pretty terrible looking.

So I've been looking into other paths I might take.

Also maybe it's fine to use unreal default systems and I'm just doing it wrong?

[opal shore]

Is it possible to save the state of a game before the listen server leaves so they can resume later or this is not possiblr?

W sessions

[fossil spoke]

Save as the Host?

You would probably just initiate a save before the leave operation is executed?

Given that typically a "leave" is initiated by some sort of button press, you have control over when the leave actually occurs.

The "Leave" button would really be a Save + Leave operation

The Leave part would only happen after the Save was complete.

[dark parcel]

Open console, net emulation.pktlag 300, or something like that. If 0 lag is introduced you are testing fake mp. Always add some lag when testing

If u already have rubber banding at 0 ms, I would have doubts if it work at all in real settings

[dark parcel]

What if they alt f4? 😳

[rare compass]

Random question, I'm not sure where else to ask this. I'm using Steam for multiplayer, and on the server browser someone has created a server called "Kill all J***". Obviously that's extremely offensive, and potentially even illegal in terms of hate speech, but what on earth can I do about it?

Obviously I can't terminate the session because it's between the host and Steam's servers, and I have no visibility of the host's SteamID. Is this something I have to report to Steam? Has anyone else had to deal with this sort of thing? Thanks 🙂

[fossil spoke]

Cant help that.

Periodic saves?

You can only do so much

[dark parcel]

Is there something we can run before client is booted from the map when listen server leave?

[fossil spoke]

Potentially.

[dark parcel]

Maybe you can intercept the game from being started if the name contain offensive words

[snow trail]

hello, what alternatives do i have to Steam's online subsystem to make players be able to join other player's listen servers without having them port forwarded?

[rare compass]

Yeah, I think I'll have to implement some rudimentary dictionary checks, but I'll never catch everything.

[dark parcel]

One can only do soo much

I would worry more about putting my time for the gameplay

[dark parcel]

Epic online service maybe

[snow trail]

does that require publishing on epic games store?

the entire point is im broke so i cant afford to publish to any major online store lol
ill probably go for itch.io

[dark parcel]

I only use steam, so not sure

@snow trail u r missing most of your audience already if you don't use the big platform

[snow trail]

im aware of that, but not sure i can do too much about it

[dark parcel]

Just publish on steam?

How much do you think it cost

[snow trail]

that requires money though

its 100€

[dark parcel]

Right , if u can't afford that. Use their default app id

Then do a crowd funding maybe

[snow trail]

wait, you can just do that? and the subsystem works?

[dark parcel]

Yes for development, I don't know for published app

I mean to publish requires you to pay that $100

But just for testing and playing with friends, that's completely free

[snow trail]

i see

ill look into it then, thanks

[fossil spoke]

Is it your game?

Are you the developer of the game?

[icy jetty]

Report it, it’ll get taken down pretty fast

[hoary spear]

Feels like I'm doing something illegal here

void UInventoryComponent::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
{
  Super::GetLifetimeReplicatedProps(OutLifetimeProps);
  if (bReplicateOwnerOnly)
  {
    DOREPLIFETIME_CONDITION(UInventoryComponent, Inventory, COND_OwnerOnly);
    DOREPLIFETIME_CONDITION(UInventoryComponent, InventorySize, COND_OwnerOnly);
  }
  else
  {
    DOREPLIFETIME(UInventoryComponent, Inventory);
    DOREPLIFETIME(UInventoryComponent, InventorySize);
  }
}

[soft flare]

Guys the "on owning client" node doesnt really work, isnt that supposed to do something only for yourself and nobody else can see it? i am trying to play a camera shake on my client but it keeps shaking for the server aswell

[hoary spear]

depends if you're doing it correctly or not

[soft flare]

Idk i have it followed to a multicast that plays my animation

[hoary spear]

https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/8/a/48a3f1911d6ccd848808025a01510fdb4db7d177.png

[soft flare]

i tried it to put it behind a "run on server" but same thing

[hoary spear]

Who's the owner

[soft flare]

Wait i send the code

[hoary spear]

still gotta answer me that

who's the owner of the actor that holds the code

[soft flare]

the actor itself

or wym

I have 2 players and they play the shake in their code

after attacking

I have it on a montage notify

I cant fkn screenshot

it wont fire off for some reason

[hoary spear]

well who's the actor

is it a player owned actor ?

[soft flare]

yes

[hoary spear]

or an unowned one?

[soft flare]

nono the player does it

in his own code

[hoary spear]

so which actor is it ?

Character?

[soft flare]

yes

[hoary spear]

kk

then play on owning client should work just fine

[soft flare]

finally

The owning client thing is behind the multicast so i think that messes it up

i tried to put it behind "notify begin" but same thing there

the only thing ive learned is i do variables on the server and animations and mesh changes on the multicast

but idk how to play things only for the owning player

[hoary spear]

you gotta clean up this mess

[soft flare]

its part of the function it takes all variables from the inventory

thats why its so filled

[hoary spear]

you can still clean it up

its an event graph

you got like 60 options