multiplayer

[silent birch]

@kindred widget

[shrewd tinsel]

https://i.imgur.com/mFlVxEh.png

i cannot read the transform value from the server, i dont get it

https://i.imgur.com/EhlUs57.png

[kindred widget]

@shrewd tinsel What is it returning?

[shrewd tinsel]

zeros

[kindred widget]

That is odd. What happens if you set those transforms as defaults? Does it still zero out?

[shrewd tinsel]

what do you mean set to defaults?

https://i.imgur.com/rtXPeOM.png

https://i.imgur.com/23NpThe.png

is storing playerposition variable in player controller good idea?

it should be replicated across all machines, this variable, right?

[kindred widget]

@shrewd tinsel I meant if you set the variable default to something other than zeros in the player controller blueprint, does it overwrite it back to zero when you try printing it, or does it give you that default? Just asking if your variable is updating.

[shrewd tinsel]

https://i.imgur.com/QiJddBM.png

check it

if i put like 999 999 999 in loc or rot in transform, it still reads 0 on server

so the server doesn't get the UpdateLocation event

https://i.imgur.com/7Pag1c1.png

if i set default transform in player controller to 555 555 and so on, it never gets updated

[grizzled stirrup]

If you have several categories of perks / upgrades that players could potentially have (Defensive category / Offensive category / Movement catgegory etc.), would it be better to split them into several smaller structs (each upgrade is a uint8), or one struct with all the upgrades inside?

I'm leaning towards several smaller structs just to make it easier to categorize and apply them at different times

[silent birch]

I could not solve my problem

[meager spade]

@shrewd tinsel don't use GetPlayerController

PlayerController 0 on server might not be who you think

[silent birch]

Yeah, do I have to make my system that prevents a player from taking another player's weapon in the character's BP?

I can not disable the weapon's collision box

But I can only destroy it when I want

[tribal plover]

have a pretty hard question...

The mouse will rotate but then smoothly goes back to center of screen and snaps back... anyone had this issue?

maybe because the actor rotation is being sent back to the owner as well.. so it gets it twice an thats why you jitter..

any way to ignore your own rotation that the server sends?

[winged badger]

blueprints have repnotify condition, one is SkipOwner

DOREPNOTIFYCONDITION(class, name, COND_SKIPOWNER) in c++

[tribal plover]

don't see repnotify in the details sadly.

i was thinking hasauthority

[winged badger]

it applies to replication in general

condition

its right below not-replicated/replicated/repnotify

[tribal plover]

I think the big issue is that when moving the mouse (rotate) it snaps back to center of screen.

Have had multi people try to help but did not know either.

[tribal plover]

hmm noone

[little fulcrum]

hey, how can i disable console commands in a development build because i dont want there to be cheaters in-game using commands

[lost inlet]

well you wouldn't ship a development build

[shrewd tinsel]

how does one make an actor visible to player but invisible or non existant for everyone else?

https://i.imgur.com/TdQhbeE.png

how come does player transform value is the same for all clients?

this is a graph from playerstate

https://i.imgur.com/gBvyZ1a.png

thats how im getting it

[silent birch]

You can not make your visibility code without replicating it and he certainly does not see it anymore

@shrewd tinsel

Or you uncheck this node

[shrewd tinsel]

and it will disappear?

[silent birch]

Yes because he will not be seen by other players

But only by him

[shrewd tinsel]

thanks

[silent birch]

That's good?

[shrewd tinsel]

do you know how can i send variable from client to server?

[silent birch]

I do not really understand what you mean

[shrewd tinsel]

i want to update player locations for all players on server

how do i get all players locations on their local machines

[silent birch]

Their location in the game or in the real world?

[shrewd tinsel]

game

send pawn transform to server

and make server move a replicator actor

[silent birch]

I can only help you find the rental of all players (well I will try)

In my opinion to locate all the players you cast to your actor and you call the node get world location

[shrewd tinsel]

it doesnt work like that

ive tried everything

going to try again fresh start once again

[silent birch]

OK

[meager spade]

@shrewd tinsel you have to send a server rpc

only server can replicate stuff. client has to tell the server if he wants something to replicate/affect others in the world.

say like Health for example. Client can adjust his replicated Health property but it will only adjust for him, other players won't see the health change. But if the server adjusted the client's health, then that will replicate to all players.

@shrewd tinsel if you want the server to move all players, you can loop through the player states located inside GameState, grab the controller. From here you can access the pawn to get the location, or send a Client RPC asking the client to do something

[shrewd tinsel]

https://i.imgur.com/KLpIVYN.png

like this?

[meager spade]

what is PlayerControllers?

and where does it come from

[shrewd tinsel]

players connected

[meager spade]

your own array?

[shrewd tinsel]

yes

i add them

[meager spade]

ok

[shrewd tinsel]

arrayofplayers also exist

[meager spade]

but remember controllers won't have a valid world position

unless you explicitly set controller to be attached to pawn

but i can see your getting the controlled pawn

which is good

[shrewd tinsel]

im getting a controlled pawn and its transform, but it reads it from the servers version of the pawn, not the real clients transofrm

[meager spade]

ofc it would

server has a copy of all pawns

when you move locally, you need to tell the server your new position

[shrewd tinsel]

then i did this

https://i.imgur.com/IteoAvx.png

[meager spade]

so the server can move his actor

[shrewd tinsel]

https://i.imgur.com/3Owhfg4.png

and the player controller is sending like that

it doesnt work

[meager spade]

that seems very dangerous

[shrewd tinsel]

im just trying to get to read clients location, its as simple as it can be

[meager spade]

yeah but that map is bad, map can only have one unique key

[shrewd tinsel]

but all the controllers ar adding themselves to it

[meager spade]

right, but only the first time its called

unless i am missing something with how BP version works over c++

[shrewd tinsel]

if u add a new key and it exists it replaces key

[meager spade]

i think we should go back to basics

Explain to me, what are you trying to do, how does your "player" move, what is your end goal

[shrewd tinsel]

its a physics pawn, i want to replicate its movement through the server

i can get all players transforms and lerp them or smt like that

[meager spade]

so client moves locally, tells the server his new location, server interpolates the location from its current location to the one it just recieved from the local player

right?

[shrewd tinsel]

i'd say players submit their transforms to server, then clients take the transforms and apply them to 'replicant' actors that represent the pawns in the server

[meager spade]

yes so clients "simulate" the other pawns movement

[silent birch]

For example, if a player leaves the session, how will I do so that there is a message that is displayed to the players who stayed in the session but not to the players who left the session?

[shrewd tinsel]

yeah

[meager spade]

bp only right?

[shrewd tinsel]

yes im a bp pleb

but it is possible and quite simple i think

it just doesnt click for me somewhere

[twin juniper]

Let the servers world version be the truth because you can never trust the client's local world. I just want to point that out. It is dangerous to directly trust the client. The whole engine replication system is written with this in mind

[meager spade]

yeah im just wondering if you have access to Is Simulated Proxy

in bp

[shrewd tinsel]

@twin juniper im aware of the cheating and i don't care right now about that

[meager spade]

cause it might be easier just to have a struct

which is replicated

on the other pawns

we check for Simulated

and use the details from that struct

to interpolate

that is how the built in movement component works

[shrewd tinsel]

can you expand on 'check for simulated', why check?

[meager spade]

so on tick

on the player pawn (the physics actor)

we branch on IsSimulated or not

Simulated is the version of the pawn "other clients" have

so, owning client is Autonomous Proxy, other clients are "Simulated proxy"

[shrewd tinsel]

https://i.imgur.com/mtn6puH.png

is this what youre talking about?

[meager spade]

thats authority

dang and simulated proxy is not exposed to bp

well that is stupid.

well we can work around that

using IsLocallyControlled

[shrewd tinsel]

what is the struct made of?

[meager spade]

well for now it can just be the transform

[shrewd tinsel]

right

[meager spade]

but eventually it can have the Rotation

and whatever else you need to send

[shrewd tinsel]

https://i.imgur.com/aR7XvnQ.png

is this what you mean?

[meager spade]

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_wmn6gagrmv.png

that is it.

that is inside your physics pawn

[shrewd tinsel]

im going to try implement this

[meager spade]

here

http://www.interkaos.com/grabs/Z1qLl9PKKx.png

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_eBpCLbW1bO.png

should have all the info you need

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_QWpleVgnC7.png

[shrewd tinsel]

it works only on server

[meager spade]

show me what you have now

cause it works fine for me

[shrewd tinsel]

https://i.imgur.com/W1ftg81.png

[meager spade]

show me my transform property

[shrewd tinsel]

https://i.imgur.com/TYe5rmX.png

[meager spade]

and click Class Defaults

and type replicated

show me the details

[shrewd tinsel]

https://i.imgur.com/n8z2MLr.png

[meager spade]

replicate*

what is the result of a print

for transform?

[shrewd tinsel]

https://i.imgur.com/Jz4IqCF.png

yellow

[meager spade]

what is yellow?

[shrewd tinsel]

the print result of the transform

[meager spade]

yes but where from

[shrewd tinsel]

sec

[meager spade]

also mark the RPC not reliable

never send a RPC on tick as reliable

[shrewd tinsel]

ok

https://i.imgur.com/6nwWuKM.png

[meager spade]

wait

http://www.interkaos.com/grabs/UE4Editor-Win64-DebugGame_u6aDCpsksi.png

this might yield proper prints

forgot to set it locally

[shrewd tinsel]

it fucking works

thank you so much

[meager spade]

so much simpler 😄

[shrewd tinsel]

perfection is in simplicity

[silent birch]

How to use this node

[pastel thunder]

@meager spade In the Multiplayer games like PubgMobile, should I program our server to control things that happening... Like make a safe zone and after 5mint start zone shrink and make redzone... ???

[white mason]

Hello, so anyone know why game is slowed on dedicated server, only on 2+ players?

[peak star]

Could be many reasons. Does it have this same problem with everthing the same except being a listen server? Or only on dedicated?

[thorny jay]

Yo, if I call a server function to generate an actor on server, how do I get the actor's pointer on client?

[chrome bay]

The actor should be replicated, then you can access it somehow.

If you want it set to a specific property you'll need a replicated pointer to the actor, then set that on the server to the replicated actor.

[thorny jay]

This is what im doing. the NewSpwanedFlagActor is a replicated pointer. But it always nullptr on client

[peak star]

@white mason does it have the same problem on listen server?

[white mason]

no

only when there are 2+ clients

[chrome bay]

@thorny jay First of all don't do C-style casts, you don't need to and they're "dangerous"

[ocean geyser]

is it framerate lag or network lag? is this when you test on the same pc with 2+ clients or separate pc's?

[chrome bay]

Second, 'NewSpawnedFlagActor' would have to be a replicated property

And you can't garauntee that it will be valid by the time the client gets that RPC anyway

So you need to use an OnRep callback.

Also use *GetNameSafe(SomeUObject) to print an objects name in a log message, with %s

[thorny jay]

it works now... the C-style is fine I think. I forgot to check "Component replicates"

[chrome bay]

You don't need the C-Style, SpawnActor is a template and already casts to the required type

What you've done there won't work anyawy

Even if NewSpawnedFlagActor is replicated, there's no garauntee it'll be valid before the RPC is called.

So sometimes it might work, other times it might not

[thorny jay]

it has a timer to validate the pointer

[chrome bay]

Which runs once, and still might not be valid

[ocean geyser]

hence the template. if you do end up needing to do a separate cast for some reason, use cast like so. but as Jamsh said you dont need to cast when using spawn actor

if (ARFlagActor* Actor = Cast<ARFlagActor>(castfrom))
{
    //whatever here
}

[thorny jay]

it runs until the pointer replicated

[chrome bay]

The timer is non-looping

Oh nvm

Still.. gross

OnRep callbacks are the way to do it

[ocean geyser]

also what about having the actor being replicated with an OnRep? so once it goes from nullptr to a valid pointer the clients will get a notification telling them that the actor is good to go?

would that work

[chrome bay]

Better yet, why not just call GetFlagWidgetObject()->etc. from the BeginPlay of the flag actor

No point calling it from somewhere else

[thorny jay]

Yea, I should use OnRep. thx

w8 I cant. I need this only running on the client who called the server function

[ocean geyser]

still use onrep but with owner only condition for replication?

DOREPLIFETIME_CONDITION(class, variable, COND_OwnerOnly);

[thorny jay]

DOREPLIFETIME_CONDITION THIS?

that's really helpful. Thx alot man

[ocean geyser]

hopefully that works for you

[thorny jay]

😋

[white mason]

@ocean geyser yeah i test on same pc 2 clients

@peak star yes, listenserver is also affected. 2+ players and their walking and animations are slower, but not looking around ( so i assume it's not hardware lag)

[ocean geyser]

do you have something thats just sending a crap ton of network traffic around? would that even affect it if your testing on the same pc?

[glad wharf]

It could also simply be your computer struggling with simulating 2+ instances of the game at the same time. You should use the profiler to identify the performance bottleneck.

Also if you can try with 2 different pcs and check if the behavior persists, it could help

[white mason]

I don't know if it'll help, but I'll paste it in here.

first one, on one client dedicated server (all good) and second one bad on 2 clients

[white mason]

idk what's going on

[ocean geyser]

test with another PC like Saltiel said

[white mason]

Okay

[unreal pine]

I want to make a "Steam Advanced Sessions" server invite only - with these settings I'm not able to invite someone through the steam overlay. Am I doing it wrong?

I tried also messing around with "Allow Join Via Presence Friends Only", and have the same problem

I figure I can make an Extra Setting for it, but it seemed almost like those options are to handle that interaction

[unreal pine]

https://tenor.com/view/sendittt-gif-10959017

I'm using Extra Setting for it, I'll report back but it should be robust enough to handle the "Invite Only" stuff I wanted 🙂

[foggy idol]

HELPPP

So my clients won't update unless I close the window both in editor and at runtime

The first picture is after I left the window

Before I left the timer was frozen on 2 secs

But while I'm not interacting with the window everything works fine

Please anyone help me this thing is driving me mad

[timid moss]

where is the best place to identify what team your player is on?

[dark edge]

@timid moss PlayerState

[peak star]

@foggy idol thats pretty weird. Are you using a source build of the engine?

[foggy idol]

@peak star downloaded straight from the launcher

[thin stratus]

Quick question about Subobject replication: Can UObjects have RPCs if they are replicated through an AActor?

[chrome bay]

They can

You just gotta do this (two secs)

Override these two funcs:

{
    check(GetOuter() != nullptr);
    return GetOuter()->GetFunctionCallspace(Function, Stack);
}

bool UST_InventorySlot::CallRemoteFunction(UFunction* Function, void* Parms, struct FOutParmRec* OutParms, FFrame* Stack)
{
    check(!HasAnyFlags(RF_ClassDefaultObject));

    AActor* Owner = GetOwningActor();
    UNetDriver* NetDriver = Owner->GetNetDriver();
    if (NetDriver)
    {
        NetDriver->ProcessRemoteFunction(Owner, Function, Parms, OutParms, Stack, this);
        return true;
    }

    return false;
}```

[thin stratus]

Awesome, thanks! (:

[chrome bay]

urgh

How do I bind to Steam Callbacks on the Game Thread?

Currently they're being executed on the online thread, I guess because the Steam OSS is executing them.

Well actually, it is bound on the game thread, but it's being called by the online thread

[thin stratus]

@chrome bay No idea, I usually wrap whatever callback comes in into AsyncTask function, specifying GameThread

[chrome bay]

Yeah I can't in this case, it's just a generic callback from Steam 😦

UserStatsUnloaded_t

[thin stratus]

Yeah but the function you bind to that

Can call another function on the gamethread

By using AsyncTask

[chrome bay]

Ah yeah, that's what I need to do

Dammit.. how straightforward is that?

Do I have to create a full async task type and push that into the async tasks for the OSS?

[thin stratus]

Nooo

Wait

2 sec, VS is freezing after 2 clicks -_-

[chrome bay]

haha

[thin stratus]

#if PLATFORM_WINDOWS && !UE_SERVER
void UHLPlayFabSubsystem::OnPurchaseResponse(MicroTxnAuthorizationResponse_t* pParam)
{
    bool bAuthorized = pParam->m_bAuthorized & 1;

    AsyncTask(ENamedThreads::GameThread, [=]()
    {
        if (bAuthorized)
        {
            ConfirmRMItemPurchase();
        }
        else
        {
            HandlePurchaseRMItemFailed(false);
        }
    });    
}
#endif // PLATFORM_WINDOWS && !UE_SERVER

Not saying this is perfect or good, but that works.

[chrome bay]

ah perfect, thanks! I'll give it a shot

[pastel thunder]

@thin stratus Steam is a Server right????

[chrome bay]

That did it - cheers Cedric!

[thin stratus]

@pastel thunder Wat
@chrome bay Awesome!

[pastel thunder]

@thin stratus Am I worng?

[chrome bay]

Steam isn't a server it's just a service provider

It doesn't actually host and run your game servers

[thin stratus]

It's a very vague question

[pastel thunder]

So, why most of YouTube tutorial says that "STEAM MULTIPLAYER"

[grizzled stirrup]

@pastel thunder Steam multiplayer typically means the process of hosting and joining other games with Steam players- the players themselves actually host the games, but you find and connect to games via the Steam online subsystem

[pastel thunder]

Okay Dude

Thanks

Are you guys developer of any gaming company???

[peak star]

@foggy idol what's your operating system? Is this running on a laptop?

[rich ridge]

Is it possible to connect to UE4 dedicated server not from actual UE4 game but from other service and this connection should be treated as a player has connected to UE4 dedicated server.

[fleet raven]

for what purpose?

[rich ridge]

It's basically a socket connection.

I have a problem where I want to spawn some invisible actors or players which don't have enough significance on damaging other heroes but they play crucial role. So I was thinking that I will have a python script which will handle all these stuffs

[fleet raven]

sounds like the proper way to do it is not that but just spawning bots on the server

[rich ridge]

My invisible players are depending on other external factors and sometimes those external factors are expensive to calculate and I don't want to flood my UE4 dedicated server with network packets

Just think I have a central repository of actions whose state depends on external factors but all the actual players are going to get affected by these

I don't want to link my central repo with dedicated server

If something is wrong with repo I will only fix repo. If I integrate repo with server then I have to patch server also.

I m trying to separate things

[foggy idol]

@peak star I use Windows 10 and yeah I'm on a PC. Regular laptop with 8GB ram and intel i5

[peak star]

Hm i dont know. I jave had that problem too before but I domt remember how I fixed it. Maybe there is a project setting for whether it runs in background or while windownis suspended?

[ancient root]

Any one here exprienced with AWSGameLift ?

[foggy idol]

@peak star thanks

[rich ridge]

@ancient root I have recently built my dedicated server for Gamelift Linux

[ancient root]

Can you have multiple instances of the same fleet ?

[rich ridge]

yes

[ancient root]

It wont let me or some reason weh n itry to assigned for than 1 instance

to a fleet so i can have multiple sessions

it just tells me to fuck off with no explanation

[rich ridge]

It should let you create multiple fleets. Then there is no point of scaling without multiple fleets

[ancient root]

I can have multiple fleets

but i want more than instance per fleet

[rich ridge]

no that u can't have

in that case use big instance

one fleet = one instance

[ancient root]

Yeah im doing that, but i want my users I say i want its a must

i want my users to host their own game sessiosn with a password

[foggy idol]

But it works fine at runtime between 2 pc's so I think it's just a. Glitch or something

@peak star

[ancient root]

@rich ridge Hey so, how can i let my user shost multiple sessions

[rich ridge]

@ancient root Modify Engine

[ancient root]

What ?

[rich ridge]

its 1 is to 1 mapping

[humble zealot]

Trying to run a dedicated server

Theres no errors or warnings

just doesnt load past [2019.11.11-16.44.07:695][ 0]LogWorld: Bringing World /Game/Loch/Loch.Loch up for play (max tick rate 30) at 2019.11.11-16.44.07 [2019.11.11-16.44.07:811][ 0]LogWorld: Bringing up level for play took: 0.998997 [2019.11.11-16.44.07:812][ 0]LogGameMode: Display: Match State Changed from EnteringMap to WaitingToStart [2019.11.11-16.44.07:882][ 0]LogGameState: Match State Changed from EnteringMap to WaitingToStart [2019.11.11-16.44.07:882][ 0]LogLoad: Took 7.176369 seconds to LoadMap(/Game/Loch/Loch) [2019.11.11-16.44.07:883][ 0]LogLoad: (Engine Initialization) Total time: 9.68 seconds

[grizzled stirrup]

If you need to send text from one client to all other clients, is FString the best text format to use?

Sent as const FString&

Looks like it's the case: Note that you should not store FNames on disk or serialize them over the network. They are guaranteed to be unique only within the local process (not even on the same machine). When persisting or serializing FName fields, convert them from and to FString instead.

[chrome bay]

You can actually send FNames directly, they just get sent as FString apart from a few specific cases like NAME_None etc.

[peak star]

@foggy idol yes try it on other machines. Mayne something is wronf with your PC or Windows and not with the game

[grizzled stirrup]

So they would be the same cost as an FString in terms of bandwidth regardless?

Will always send as FString explicitly in that case just to remind myself. Thanks for answering

[shy apex]

hey quick question, can you store a session result and join it later?

like you click on a session, it stores the session result, then you join another session. can you join the previous session from the stored result?

[grizzled stirrup]

Should a text chat message RPC be unreliable?

Is there a high chance it'll still make it through?

Or should unreliable only be used in cases where you are frequently firing off RPCs that don't have to make it through (in cases like is done with the CharacterMovementComponent)?

[fleet raven]

it absolutely should be reliable

imagine sending a message and it just drops it

your users would be like

reliable should be your default, and unreliable used only in situations where it truly doesn't matter if it's dropped ( say because you're going to send another rpc with a newer value soon™ anyway)

[worthy perch]

On that note, when do you crash from reliable RPCs failing?
I vaguely remember that you get some buffer overflow when maybe too many reliable RPCs fail?

[fleet raven]

you will never crash from sending too many rpcs

you will, however, disconnect the client if you queue like 250 of them in the same actor

[worthy perch]

Alright, disconnect the client, that's correct. Thanks.

[winged badger]

the RPCs sent on Tick should never be reliable

if one fails more current one will land before the sender has any idea the previous one failed

[balmy kindle]

Hey guys, i have a dedicated server setup. Where do i call "Interaction" Widgets on Level Objects? On the Object itself, or on the HUD Class?

[winged badger]

what does "call Widgets" mean there? 😄

[grizzled stirrup]

Thanks Zeblote, reliable it is!

[balmy kindle]

For example, i have a Object in the Level where when you overlap the trigger you see a text "activate". Do i create the widget for the triggering actor in the Object itself, or better have it in the Pawn Class, HUD or else?

[winged badger]

depends on your interaction system

what type of server and even that its a multiplayer game don't really affect the choice

if you are doing some kind of on-tick trace (isometric camera for example) your controller will have information of what's under your mouse at any given time

but even then i'd go widget component on the interactable actor

since if the HUD were to move a widget at a hittest location it would look weird

never the pawn class though

you could spawn a widget component on the object when it overlaps to save yourself the need to have more then one of them

but that is a slightly more complicated setup

as in, interactable actors have a class of Widget required to display them

HUD has an actual widget component on itself

[balmy kindle]

The widget is called on overlapping a trigger box, the interaction system is shooting a line trace in the BasePlayer Class what is calling a server function inside the PlayerController what is then going to a BP Interface which is implemented in several Objects. That works really well. But the widgets behavior with the IsLocallyControlled Node is giving me a hard time 😅

[winged badger]

and it attaches it to the interactable actor, instantiates the userwidgetobject and initializes it correctly when widget is required

[balmy kindle]

Hm, nice idea with the widget spawing on the Object instead on the caller

[winged badger]

do not mix networking and widgets

server doesn't need to tell your clients if they should see the interactable or not

client code should be able to figure it out on its own

its why i told you that it doesn't even matter if its a MP game for this

if and when the player presses the interact button the server can then do a check if the player is in fact able to interact with the object

[balmy kindle]

okok.. so i have to change some variables in the PlayerClass to figure out if they can see a widget or not?

ah ok

will try some stuff^^ thanks :9

🙂

[winged badger]

for just showing the widgets, local only

[polar bridge]

Net PktLag = 1000 should work in PIE yeah?

[winged badger]

it will be one sided

[polar bridge]

trying with shootergame but doesn't seem to have any effect

[winged badger]

unless you enter it in both consoles

[polar bridge]

i did

[winged badger]

but it does work in PIE

[polar bridge]

weird...doesn't seem to do anything in shootergame, when i move my character he moves instantly

on other client

[winged badger]

CMC should simulate the movement

try something that actually happens only after RPC lands on the other side to test it

[polar bridge]

ah, kk

[winged badger]

simulated proxy should have the lag noticable

when it starts moving

autonomous shouldn't

[polar bridge]

kk, will play around with it a bit. trying to create a bullet hell shooter with slow moving projectiles and one of my main concerns is lag, so trying to nail down what they do to compensate for it

[silent birch]

Helped me with the travel server system

Please

[silent birch]

Can you teach me more about travel server?

[quaint tendon]

Complicated issue; origin shift in MP with dedicated server works properly with player input calling the origin shift. Distance checks on tick in character BP or in level BP cause second player character to teleport all over the map. What kind of event should autonomously call the origin shift so the players not performing the shift don't glitch out? Tried putting it on a timer without distance checks.

[flint rose]

In my game state, I'm trying to listen for the event "AnyDamage" but it's not firing. I'm calling TakeDamage on an actor.

            int32 DamageToTake = GetCharacter()->Strength + DamageActor->Strength;
            OtherCharacter->Health -= DamageToTake;
            FDamageEvent DamageEvent;
            float DamageTaken = OtherCharacter->TakeDamage(DamageToTake, DamageEvent, Character->GetController(), GetCharacter());
            UAISense_Damage::ReportDamageEvent(this, OtherCharacter, GetCharacter(), DamageTaken, OtherCharacter->GetActorLocation(), DamageActor->GetActorLocation());

[harsh lintel]

I have a server rpc that executes once per object in an array, I want to execute a function when every object in the array is done with the server rpc, how can I achieve this?

[winged badger]

that sounds awfully weird

easier to do one RPC and send the entire array through it

[ocean geyser]

not sure if im understanding you quite right and that sounds like a crap ton of network traffic that should be avoided if possible, but why not have a for loop that executes your server RPC and then at the end of the loop simply execute the function you want? otherwise if the array is replicated then have a single multicast to perform your operations on the client instead of the server doing something and then trickling down to clients

more info would be helpful here

wait duh, im rereading what you said now. like Zlo said, pass the array to the server and have the server perform everything instead of making an rpc call for each element in your array

[meager spade]

sending a rpc for every element in the array is waste

you also do know, once the arrayh is modified, if you have it replicated, you can just use OnRep_SomeArray if it doesnt need to be instant on the clients.

[ocean geyser]

man are you typin a book or somethin lol

[harsh lintel]

The object array is an array of controllers
After a timer is over, every client will send and set a variable through a server rpc with a parameter

It's hard to explain 😄

Since I don't really know how to ask this

[winged badger]

controllers don't normally replicate

[ocean geyser]

the server has access to the controllers, is there a reason its not just being monitored on the server? plus what Zlo said is another implication

[winged badger]

sending 1 RPC at a time will create a mess, whatever is being sent

[harsh lintel]

What's being sent is the "selected character" class, how else would the client let the server know this

[ocean geyser]

like what character the client wants to be so the server can make them possess it?

[winged badger]

that is hardly an array of controllers

[harsh lintel]

Yes the class so the character is spawned and possesed

[winged badger]

you put in a delegate/event dispatcher into the PlayerControllers, firing when the pawn class is set

you hook into it from GameMode, at the time you spawn the controllers

you make a say TMap<APlayerController*, TSubclassOf<APawn>> in the GM

and populate it

as the RPCs come in

each PC has a single RPC, setting only its own character class

it runs a set function, that calls the event dispatcher

once all controllers report in (GM is aware of number of players)

you spawn the characters and progress the MatchState to Started

much more elegant to do the setup on a lobby map, then just server travel, btw

[harsh lintel]

So the event dispatcher basically just checks that every controller has a set pawn every time it's called, and if so it proceeds to the function I wanted?

[winged badger]

event dispatcher doesn't check anything

it has payload, APlayerController*, TSubclassOf<APawn>

when the RPC with subclass arrives, PC just calls the dispatcher plugging Self into APlayerController* and class that arrived into class pin

GameMode in its Handler caches the information and then checks if every player set its class

[harsh lintel]

Right my bad, I've completely forgot about dispatchers, that really helps thanks a lot

[dark edge]

@flint rose I'm pretty sure event any damage only fires on whatever actor was damaged.

[rich ridge]

@silent birch this link will help you in server travel

www.google.com

[silent birch]

I go try @rich ridge

[rich ridge]

@silent birch try this link

https://wiki.unrealengine.com/How_To_Use_Sessions_In_C++

It has how to host session, join session and how to travel

[silent birch]

OK thanks

In this link where do not even talk about travel servers @rich ridge

That's the good code?

@rich ridge

[rich ridge]

@silent birch bro just read carefully it's there. Server travel is there. Just read carefully. I can't help more than this. I can only give you abstract knowledge.

[silent birch]

In the link name I also saw travel but clicking I did not find server travel

@rich ridge

[rich ridge]

@silent birch the actual c++ code is there for server travel

Just read carefully

[silent birch]

I do not know how to do C ++

@rich ridge

[rich ridge]

@silent birch learn or quit

[silent birch]

Quit what?

@rich ridge

[silent birch]

I have a problem with my game, when I create a session and I try to join it it works well on the same computer, but when it's on different computers (1 computer per player) when I search the session I can not find it

Why?

[thin stratus]

Are the pcs in the same network?

[foggy idol]

@silent birch check your Network adapters on each of sometimes windows creates a virtual adapter

Especially if you previously tested the game by running two instances on the same computer

[thin stratus]

I never had that

[foggy idol]

I did

A while back

[thin stratus]

It's way more likely that he hasn't setup the game for online multiplayer

[foggy idol]

It nearly drove me mad

After spending 3 months setting it up one day it just stopped

It was a true break my PC moment

[thin stratus]

Right, let's check the basics first. If we can't solve it we can check for stuff like virtual adapters

[silent birch]

I do not understand, how does that a virtual adapter?

[thin stratus]

Ignore it for now. Are the pcs in a different network?

[silent birch]

Connected to the same WiFi?

[thin stratus]

Then they are in the same network. Do you use any subsystem, like steam?

[silent birch]

Yes a subsystem but for steam

[thin stratus]

So you are trying a LAN setup while having steam?

[silver lotus]

@silent birch you need to remember that ServerTravel DOES NOT work in PIE

I haven't followed the convo - I just saw that picture and want to make you aware of that limitation

[thin stratus]

That's not true though

SeamlessTravel doesn't work in PIE

[silent birch]

Not my game I do not use steam @thin stratus

[silver lotus]

@thin stratus ServerTravel doesn't work as far as I'm aware

Care to elaborate? Because you could actually help me with my own problems

[silent birch]

What is PIE? @silver lotus

[silver lotus]

It's the editor play window 🙂

[thin stratus]

@silent birch you have to answer these questions properly....

• Are both computers in the same network or over the internet?
• Are you using a subsystem for your game?

Your answers are too vague

[silver lotus]

@silent birch Have you enabled your sessions to be LAN Enabled?

[thin stratus]

@silver lotus ServerTravel can be SeamlessTravel if the Gamemode is setup for it

[silver lotus]

Ah

[thin stratus]

That's also the preferred way iirc

A hardtravel should work in pie

[silver lotus]

Yes

[thin stratus]

But the seamless version does not

[silent birch]

I do not understand the first question, the network so the WiFi @thin stratus

[thin stratus]

@silent birch The two pcs that you want to play with, are they connected over the internet or do you have them both at home

[silver lotus]

Also while I have the chance - @thin stratus Thank you for the work you've done to teach networking. It helped me a lot 🙂

[thin stratus]

Cheers, glad it helps (:

[silent birch]

In my game players can activate LAN and disable it as well @silver lotus

[silver lotus]

Okay, cool. So do you have the OnlineSubSystem set to NULL?

[silent birch]

I have it's both at home @thin stratus

[silver lotus]

Yeah so same network - Aka LAN

let me have a quick readback on the convo. 🙂

[thin stratus]

Half sure this is the same problem i have. If it's in the same network and using lan, then it might just be the router

[silver lotus]

Okay - i'm caught up.

Yeah, its highly likely the router

[silent birch]

I tried by unblocking LAN @silver lotus

[thin stratus]

Mine doesn't forward rhe 255.255.255.255 broadcast

[silver lotus]

@silent birch are you trying to use Steam?

[thin stratus]

So it can't find the sessions

[silver lotus]

If you're trying to use Steam - You can't use the same computer, or the same steam account from what I remember

[thin stratus]

Nathan would need to check the logs on the client that searches

[silent birch]

No steam @silver lotus

[silver lotus]

Okay cool. So definitely check the logs

[thin stratus]

Not sure if that prints by default though

[silent birch]

Yeah he does not find the sessions @thin stratus

[silver lotus]

If it's an error it will

[thin stratus]

It's not an error

It pings and only the same pc responds

[silver lotus]

Can you send me a screenshot of your "Create Session" and "Find Session" nodes please @silent birch

Ah okay

[thin stratus]

The router doesn't forward the network broadcast

So the other pc never gets the call

[silver lotus]

Makes sense.

[thin stratus]

Sessions in lan work pretty different than online

[silver lotus]

But lets just confirm the nodes are configured properly 🙂

[silent birch]

OK @silver lotus

[silver lotus]

It could be simply that they arent looking for the same session criteria

[silent birch]

Sorry if i send photos instead of screenshots, my connection is constantly slow so my computer can not open discord

[silver lotus]

All good mate, as long as we can see the properties 🙂

[silent birch]

OK thanks

[silver lotus]

Hey @thin stratus you might know more than me - are the arguments such as "listen" case sensitive..?

Sidenote.. @silent birch you can actually use the Open Level node

instead of Execute Console Command

🙂

[silent birch]

Yes, but that also works

[silver lotus]

It does, I'm just sharing information with you 🙂

Do you have the FIND SESSIONS node?

[silver lotus]

Alright..

Can you throw a Print String node on the On Failure please?

Doesnt matter what it says - Just need to know if it's failing

[silent birch]

OK

[silver lotus]

If it's failing - It's likely to be printing to the log file

[silent birch]

OK

Wait

[thin stratus]

@silver lotus don't think so

@silent birch can you please install discord on your pc and use something like sharex to make screenshots?

It's rude to give us these barely readable phone images

[silver lotus]

@thin stratus He has really terrible internet

[silent birch]

I discord on my PC but with my discord connection to trouble opening on my pc

[thin stratus]

The phone images aren't the solution though

[silver lotus]

Theyre atleast something mate

I can read them; Granted with difficulty

[silent birch]

Sorry

[silver lotus]

no need to apologise mate

[silent birch]

OK

Thanks

I tried on one computer the version of my game package and the other pc the version in the engine and the print string is not played but we also did not find the session @silver lotus

[silent birch]

Please explain me too the server

[foggy idol]

Wow

I can't see anything wrong in particular

Have you tried hosting and joining in the editor

@silent birch

[silent birch]

Yeah I tried but on different computers it does not work, it only works when I test on the editor with two windows open @foggy idol

[gritty lodge]

What is the best way to spawn pawns that will be possessed by players in multiplayer? Like in a Diablo 3 type game, where the players can join into a level streamed world at different times. The "server" has to create the networked pawn and then give it to the player controller? Is it possible to do this in a way that works with Listen and Dedicated servers at the same time? For example: if the game had PvE mode that was listen and PvP that was dedicated.

[thin stratus]

@foggy idol @silent birch Hosting INSIDE of the Editor across two PCs shouldn't work.

You need to start the game standalone.

Either by going into your project folder, rightclicking the UPROJECT file and clicking "Launch Game".
Or by just packaging it, although packaging of course takes longer but should be tested regulary anyway.

@gritty lodge Well, yeah, the GameMode class has lots of overrides for handling Pawn spawning.

You can set the default one to none and then handle what class they get via these functions.

This might need c++ though as some stuff can be passed easier from connection client to server this way

[silent birch]

OK @thin stratus

Even trying with the game already (in package) it does not work @thin stratus

[thin stratus]

Yeah, so if this is all true for you:

• Packaged
• LAN
• No Steam
• Two Different PCs

Then you need to locate the logs of the client and check what happens there.
I have the same issue but for me it's the router blocking the search.

[silent birch]

How to check the client logs?

Where are the client logs?

[thin stratus]

In the Saved/Logs folder

[silent birch]

OK

I will try to see

@thin stratus

Please can you tell me more about the travel server? @thin stratus

[thin stratus]

What about it?

[silent birch]

I can not do server travel

Explain to me

Help me

[bitter oriole]

Which part of the process is not working ? What's your code / BP like, how do you expect it to work and how does it work instead ?

[silent birch]

I tried this code in the game instance, the level Blueprint, the BP of the character

[bitter oriole]

Isn't there a server travel Blueprint node instead of a clunky console command ?

[silent birch]

Node Open level?

[bitter oriole]

Probably not that, no ?

[silent birch]

Yes, but So which node?

[bitter oriole]

No idea, I don't do BP. So what did you check more than "doesn't work" ? You called the event ? Did it fire ?

[silent birch]

I don't understand

[naive crater]

Nathan is your gamemode setup so that you can do seamless travel?

[thin stratus]

You are not giving enough info for us to help. You are also not investing enough time into debugging yourself.

[silent birch]

To the more we talk about it, I have to go thank you anyway

[bitter oriole]

🤷

[silent birch]

Online @naive crater

[thin stratus]

What you do is equal to saying "My lightbulb is broken." and when you are asked you just show a random switch on the wall.

[bitter oriole]

You need to invest more of yourself into this @silent birch - we can't guide you into building a complete game, you'll need to spend hours working on it yourself to understand what happens

[naive crater]

@silent birch in your gamemode itself do you have this

[silent birch]

I spend a lot of time on it but for the server travel I can not

OK thanks I go Try @naive crater

[naive crater]

Is this how you all handle your events? I'm reworking my code to be a bit more responsive for clients and am open to better workflows.

https://cdn.discordapp.com/attachments/190147382564880384/643766349788610572/unknown.png oops image didn't post properly 😄

[foggy idol]

@thin stratus that wasn't what I was talking about cus I k ow that won't work

"know

[hushed anvil]

Hey, I'm trying to develop a multiplayer game, and it works pretty well, but for some reason, sometimes I need to launch the game three times to connect to a game (I've tested it only by LAN connection, on the same computer), meaning that if I launch the game twice, I host the game on one client, but the other client can't connect, but if I launch another client, it can connect to the host.
Can anyone help? Thanks!

[grizzled stirrup]

If you had to send a player name and a color over the network for a chat message, would you be better off sending a APlayerState* rather than an FString and aFLinearColor since both the name and team num could easily be found on the server from the PS pointer?

[chrome bay]

defo

[grizzled stirrup]

Thanks!!

[chrome bay]

FLinearColor is 4 floats, so 128 bits

[grizzled stirrup]

I'm still kind of amazed how light pointers are yet give so many options

[tribal shard]

Is it possible to make a component (that is part of my FirstPersonCharacter) only visible to other players?

[grizzled stirrup]

The beauty of replication I suppose 🙂

[chrome bay]

whereas a UObject pointer will resolve to a net GUID, which is 32 bits IIRC

[naive crater]

like a third person mesh @tribal shard ?

if so just use the "Owner no see" flag on it

[winged badger]

@grizzled stirrup first thing you ask yourself before replicating data to client is "do i have that data already on that client?"

[tribal shard]

that did the trick, thank you @naive crater :)

[naive crater]

Awesome 🙂

[worthy perch]

True, unless you needed truly random colors, you could just send over a color-id.
Which, if you don't have many color options, could be super small.

[grizzled stirrup]

Yep so in the case of the PS, yes I do, I just need the ref to know WHICH PS I need!

So much easier

The reason I have the PS on the client is because of the GS player array right?

[winged badger]

no

that just replicates pointers to PS

[grizzled stirrup]

Oh just because it's replicated

[winged badger]

yep

[grizzled stirrup]

So by sending a PS pointer A to the client, he knows which of his local replicated PS's to use

And not use B or C

[winged badger]

PlayerState isn't some abstract object

[grizzled stirrup]

So it's really just sending an address

[winged badger]

its an Actor

[grizzled stirrup]

True so it's sitting in the world like a pawn right?

[winged badger]

it is

[grizzled stirrup]

Really cool, slowly getting the hang of this stuff

[winged badger]

i tend to attach mine to the Pawns

lets me query the location from PS*

and its easier to find which one is which in the outliner

[grizzled stirrup]

That's a damn good idea

I really didn't expect PS's to exist in the world before this

Thanks

[winged badger]

has some side benefits, attaching

like having a widget component that takes information from the PS on the PS actor, instead of the Pawn

[grizzled stirrup]

Removes the step of having to cast and fetch!

Really nice

[hasty crane]

Hey guys, question
LET'S SAY I want to make a game. It's multiplayer fps shooter with AI as enemy. So I have to run server simulation. And I want servers to be up to 32 players.
Should I make it using dedicated server?
How would I handle that? Let's say 10000 people want to play at the same time. Do I host 313 servers? I'm wondering how someone that has made a game on his own would manage that.
Or maybe stay with player being both client and server?

[worthy perch]

In your case, you pretty much have to use dedicated servers.

[winged badger]

i don't think a 32 player co-op FPS can ever work

not even if you have a full team just developing the AI

[bitter oriole]

@hasty crane Other concerns aside, 32 players -> dedicated

[hasty crane]

Okay I didn't say that very clear.
Idea is: players stuck on station with AI Aliens hunting them down. They have to survive while waiting for extract.

But that's not a question
Question is about servers. Ok so I would need to use dedicated servers (as I thought). But how the hell do I manage that? If let's say 10000 players want to play at the same time, do I buy 313 servers for them???

[bitter oriole]

You need 313 game servers running

Maybe on 313 virtual private servers, or on less than that depending on performance

Maybe you can get 157 VPSs fast enough to run two instances

Impossible to say without developing the game 🙂

Also you likely won't get 10 000 players on your game - or 1 000, and probably not even 100

[hasty crane]

Yeh but I'm considering best/worst case scenario. Even if it's 1k somehow. Still managing 32 servers by hand? (or less but with few game servers running). It seems... a lot

[bitter oriole]

Just to give some context, 3000 peak players is best-seller territory, so you're unlikely to hit that - don't base your entire system on that assumption

You probably don't want to hand-run these servers still

So you'll have to have some kind of management service to spin up or down instances, update them, etc.

[hasty crane]

So there are services for this?

Cus that's my question. Hand-running all this. I just gave random numbers as examples

[bitter oriole]

I mean, obviously you wouldn't hand-run it if you have 100 servers. You can run your single development server during development, and you'll naturally get experience doing that and slowly automate it

Running a network service like that isn't something you get tutorials for

It's going to depend on your financial investment, update frequency, actual player count

[winged badger]

also, you should count on being able to run 150 pawns (players, aliens) at the same time, max, probably not even that

[bitter oriole]

There are some services to help on this, but if you're doing that kind of work, you really should look into owning it because you need the skill to support and fix issues in real time

[hasty crane]

Alright I get it
Stay away from multiplayer games that are bigger than 4 player coop or sth xD

[winged badger]

its not that

its the sheer number of CMCs running around

it does create a hard cap on what you can run at the same time

[hasty crane]

I'm talking about overall mp game making
I said earlier I would like to use 32 PLAYER MAX dedicated servers 🙂

But now, seems like it has to be a job for experienced team, not single indie dev'

[bitter oriole]

As far as I'm concerned, personally, I would and do definitely stay away from anything bigger than 4P coop, it gets into nightmarish territory very fast

For what it's worth I worked on a PVP shooter with dedicated servers back in UE3 days and built some infrastructure for it, it's not exactly impossible

It's just that tasks tend to add up real fast

Even with automation, you're still looking at maintaining a matchmaking system, safe and up-to-date server stacks, you need to keep your servers updated, etc.

Still, technically it's all feasable

I'd worry more about the business side 😛

[winged badger]

besides you can scale it up later

provided you get some funding/helpers

for prototype, co-op shooter with 8 players can even use listen servers

well, for production too, as cheaters are not as much of an issue in co-op games

[toxic geyser]

hey guys im using socketio plugin for a multiplayer project and wanted to make 2 players see each other in a scene but i have no idea on how to do it.
can someone give me a little guide?Thx.

[bitter oriole]

@toxic geyser You should look into the multiplayer documentation for UE4

[toxic geyser]

i did and i was completely lost

and my main issue is idk if ue4 doc will work with this plugin im using

[bitter oriole]

Multiplayer is quite complicated, yes

And if you want to use socketio for multiplayer, you do need to rewrite half the engine

WHich is why I'm wondering why you'd use it for multiplayer

[toxic geyser]

well long story short i didnt decide on what should be used

also thank you for your help !

[bitter oriole]

I mean, UE4 has multiplayer out of the box

No plugin required

So try using that ?

[toxic geyser]

well our server programmer has not worked with ue4 before as i had not worked with ue4 multiplayer section so he suggested that we should go with socketio as it is fast or smth

so thats how it started

[bitter oriole]

UE4 multiplayer is sockets (that socketio provide) + some hundreds thousand lines of additional features

If you think you can make a better multiplayer support inside UE4 than it currently has, go ahead

[toxic geyser]

i see

thank you for the info it really helped !

[bitter oriole]

Basically try following multiplayer tutorials and see how it goes

[toxic geyser]

will definitely do it

[quaint tendon]

How to increase max level size on dedicated server? Seems hardcoded to 20km even with origin shifting

[silent birch]

I still do not understand the travel server system

It works only in c++

?

[harsh lintel]

I have a server rpc which is a listener of a delegate, im broadcasting the delegate in a client rpc but the listener doesn't seem to go off, am I doing something wrong?

the listener is added to the delegate on the server, maybe I need to replicate the delegate?

[ocean geyser]

@silent birch i think you can execute a console command for server traveling in BP. are you trying to server travel in blueprint?

[silent birch]

Okay, try the replicate @Wuuhie#1150

[silent birch]

Yes, go from one level to another @ocean geyser

[ocean geyser]

you should be able to use the execute console command node with

"ServerTravel/Game/Levels/Game/ThirdPersonExampleMap"

it says you need a transition map set? idk hopefully this puts you on the right path

[silent birch]

OK

It so?

@ocean geyser

[humble zealot]

Could anyone help me with servers. When I run a server, I can't see it. Ports arent open. it only works with the command open 127.0.0.1:7777

[flint rose]

I'm trying to get the game mode in a widget BP but it's returning null.

[fleet raven]

does your world actually use a BaseGameMode_BP ?

[flint rose]

Yes

Game Mode is null

So cast fails

[fleet raven]

a spawned widget has a valid world context, so there's no reason for it to not work

[silent birch]

My server code travel must be done in the game mode?

[flint rose]

That's why I'm asking here. 😛

[fleet raven]

the bp debugger is sometimes wrong

[flint rose]

Print string is null as well

Actually, the print string says "Client 2"

[silent birch]

Answer me

[flint rose]

It should say server.

[silent birch]

Me @flint rose?

[flint rose]

I'm referring to my question @silent birch

[silent birch]

OK sorry

@flint rose

[flint rose]

No worries.

[silent birch]

OK thanks

[fleet raven]

well, are you running it on the server?

i.e. is the title of the PIE window "server"

[flint rose]

The event is made to replicate on the server

[fleet raven]

RPC can't be used on widgets, they're not replicated actors

[flint rose]

I see. So I'll have to move functionality to something like the owned actor

[spare glade]

@pallid stone

http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

whos gamestate hmm
gamestate exist on the server and all clients
and theres 1
each player has a playerstate tho
that is always replicated
gamestate contains an array of all player states

[pallid stone]

Right ok, I thought it was like a player controller where the server has a copy of all player controllers, and the clients have a copy of their player controllers and all other player controllers

[spare glade]

yeah
Gamemode Server only events and storage
Gamestate Public Server Events and Storage
Playerstate Public Player events and Storage
Player Controller, Owning Players Events and Storage

[sharp hornet]

The GameMode/GameState multiplayer split is for confusing historical reasons

[silent birch]

This code for the travel server does not work

Sorry for picture

[spare glade]

dont you have advanced sessions

plugin

it has a built servertravel blueprint

[sharp hornet]

servertravel is a really weird function, execute console command probably doesn't get deep enough for it to work

[silent birch]

So how make?

[spare glade]

Just get https://forums.unrealengine.com/community/community-content-tools-and-tutorials/41043-advanced-sessions-plugin
to have alot more stuff exposed if u want

servertravel /Game/

thats the console command

make sure its lowercase

and the /Game/ is the location directory

so like /Game/Maps/Arena as example, after game goes out from content

[silent birch]

How?

[silent birch]

OK I go try

What is there left?

[spare glade]

wut

[silent birch]

What?

[spare glade]

what do you mean left

long as in ur gamemode you have servertravel ticked on class defaults you should be fine

[spare glade]

oh thats just stuff from video

i was in the middle of building

so i had to look up unreal multiplayer series and just screenshot that

but its just a switch to determine which map to open

[astral fossil]

hey, i'm trying to move a ball in straight line replicating smoothly. On the very beginning the movement is smooth, then it starts to get jerky, what could be the reason for that?
This is the replication configuration

thats with or without UseAdaptiveNetUpdateFrequency

I put large numbers on update frequency to check if that was the issue, but still has a jerky movement (and the pawn is moving smoothly).
I'm moving the ball with a SetWorldLocation, I imagine that its better to use some movement component, but I want to understand whats happenning first.
I used the networkProfiler and that corroborated the update frequency drops

[quaint tendon]

why isn't replicate movement checked?

[astral fossil]

I tested both with and without movement checked and it didn't made a difference

I'm guessing this movement is of physics simulation (add impulse and stuff)

I just tested this ball on an empty map and works fine, no jerk

so I think the problem arises because of other data being transfered, what I don't understand is why the ball drops the frequency being the highest net priority on the project

the pawn has 4 and didn't show that behavior

[quaint tendon]

I was having similar issues with rotation. My rotation quant is on short, left min net update freq and net priority to default. Movement is replicated, is simulating physics.

Do you have a thruster? How is it rotating? Whatever is causing the rotation should be replicated.

[astral fossil]

(ignore the first node being disconnected, i'm trying other stuff)

but this would be called on server and replicated

The translation and rotation are replicated correctly, but the update frequency drops

[quaint tendon]

Oof, adding rotation like that is no bueno

[astral fossil]

i know its not the best implementation, I rather simulate physics and set linear/angular velocity once

its more an issue of understanding why hehe

[quaint tendon]

Myriad of issues, trying to add rotation via the server will create conflicts with the ping and the rotation lerp. Ugly.

You are supplanting the physics and completely circumventing any rational use of player input.

[astral fossil]

hmm, i didn't understand that second line, can you explain?

just to give you the context, this ball will just hover on a line segment and return to initial point. If it overlaps a pawn, a sound is emitted and thats it.

I'm trying this now

(jerky still)

[meager spade]

physics replication is a PITA!

honestly its the hardest thing to do in replication

[quaint tendon]

Because you are forcing the rotation you are completely ignoring the physics calculations so the movement is not physics based while adding input. Then the server is trying to update the movement based on the physics but you are supplanting it causing a paradoxical rotation/movement calculation. It's not the same system calculating the transform when you force the rotation.

[astral fossil]

@meager spade agreed

[meager spade]

you don't want to "replicate" the actor per say

but have the local client "simulate" what should happen

[astral fossil]

@quaint tendon when i was adding local rotation there was no physics involved

it was not simulating

[quaint tendon]

How does it slow down?

Or does it stay moving?

[meager spade]

like player 1 kicks the ball, you tell the server where the ball was kicked, server tells all clients, ball was kicked here, all clients run the simulation itself locally

[astral fossil]

so, in an empty level, it seems to work fine til where I watched

[quaint tendon]

Make sure no camera lag

[astral fossil]

with my pawns, a few moments after begin play it starts to drop update rate

can I send a small video?

[meager spade]

you sure you are not just flooding the server with rpc's?

[quaint tendon]

I would recommend setting it up to use physics, I tried doing what you are doing kind of and abandoned it. With physics is way smoother.

[astral fossil]

i'm trying to make a 4 sec video but now the is miss behaving hehe

[quaint tendon]

no probs, I'll check it out later

[astral fossil]

i know in the beginning its not smooth as I said before, that was before using linear and angular velocity to move

[quaint tendon]

https://tenor.com/view/the-force-jedi-star-wars-gif-4882636

You want to simulate physics

[astral fossil]

but I'm already XD

actually now im thinking of not replicating and just leave each client with a ball by it self

[meager spade]

have the client simulate the ball

have the server just tell the client's what forces/direction etc

and voila

[astral fossil]

good idea, thanks 🙂

[dark edge]

@astral fossil Replicated physics isn't that hard for something like a ball.

[silent birch]

Hi

I can not solve my problem with the travel server

sorry if I bother you

[flint rose]

When is the appropriate time when I am able to retrieve the game state?

[silent birch]

The end match

[flint rose]

Well, that would make it very difficult to use it to display the list of users in a widget so they can ready up.

[silent birch]

Want to display a scoreboard?

[flint rose]

Basically, I'm trying to initialize a widget with all the currently connected players and display who is ready to start the match

[silent birch]

So it can happen at the beginning of the game

[flint rose]

Correct.

[silent birch]

That's good?

[flint rose]

Well, I'm getting a null GameState.

So it's not able to retrieve player state information

[silent birch]

You do not know how to use the game state?

[flint rose]

Get Game State returns null

[silent birch]

Please screenshot

I don't understand

[zealous saffron]

Can you post a screenshot of where you try to access it?

Gamestate should be valid after creation for the entirety of that game.

[silent birch]

How do you know if a player is ready?

[flint rose]

It's in their Player State.

[zealous saffron]

Yeah, someone familiar with BP specifics might be able to help you better than I can.

Where is this widget created @flint rose

[flint rose]

In HandleStartingNewPlayer_Implementation

[silent birch]

The player is ready when he executes that action?

[flint rose]

No.

This is just initializing the data to get ready to display when they decide to press the ready button

GameMode::HandleStartingNewPlayer_Implementation

[silent birch]

OK

[zealous saffron]

Where is it stored?

[flint rose]

Where is what stored?

[zealous saffron]

The widget, who owns it the playercontroller?

[flint rose]

The player controller

[zealous saffron]

Probably being fired before the gamestate is being created on the client.

[flint rose]

I've tried adding a delay as well.

[zealous saffron]

Thats odd.

Personally I would add a function in my derrived gamestate that returns these values. Store the widget in the HUD class and initialize the component's values in the PC's BeginPlay(). Then use on_rep events to update it. When the playerstates ready variable changes.

[flint rose]

BeginPlay is only called once StartMatch has been called.

[zealous saffron]

Oh right

[flint rose]

Yeah, unfortunately there's not exactly an event OnGameStateInitialized or something

[zealous saffron]

Probably your issue is the same

As this

https://stackoverflow.com/questions/58582638/get-game-state-inside-editor-widget-in-unreal-engine-4

GameState is returning null because you are accessing it inside the UI

[flint rose]

That's in reference to an Editor Widget.

I've already gone through that. 😦

https://docs.unrealengine.com/en-US/Engine/UMG/UserGuide/EditorUtilityWidgets/index.html

Get Game State in regular widgets don't need a world context object since the game is actually running. It's not meant purely for Editor.

[zealous saffron]

Dunno

Sorry

[flint rose]

Well, I'm going to go to bed. Will try to conquer this tomorrow. Thanks for your time guys.

[silent birch]

Please help me with the travel server @zealous saffron

[zealous saffron]

Read the documentation

[silent birch]

I did not find a documentation that helps me well on that

@zealous saffron

[zealous saffron]

If it was C++ I would help, I don't use BPs

Call ServerTravel in the gamemode when your match ends

[silent birch]

How to call the server travel, I want that when the server goes from one level to another that it does not affect the clients

[rose egret]

how do I build for Development Client , or Debuggame Client ?

should I create an other target.cs file?

[naive crater]

@silent birch i do it in my gamestate like this

[silent birch]

And it work?

[naive crater]

Thats the way i do it in a game that i have released already. Never had any problems with server traveling itself.

[wise depot]

Hey has anybody used playfab cloudscript with unreal engine on here? I'm having trouble getting function arguments to send through correctly

[twin juniper]

Anyone able to help me, https://gyazo.com/8cdfcc32a6d3bd5c2c9ec901a9d168e3

https://gyazo.com/129957d02fbb360ca031a982bd365694

The server can teleport sucsefully

but client gets set back like the server is denieing the teleport

u can see on the client he gets teleported fort like half a second then sent back

any thought on how to fix this

[brazen glacier]

Hey guys. What's smaller to send across the network: an enum or a name? What are their sizes?

[real yacht]

FNames are not generally compressed, so when you are using them as parameters to RPCs, keep in mind that they will generally send the string each call. This can be a lot of overhead.

[bitter oriole]

Aren't FNames internally an int ?

[real yacht]

this is copy-paste from UE onlin doc.

[brazen glacier]

I thought names were intended for network, as they're essentially the most stripped-down version of user input text. can you link the doc?

[bitter oriole]

Okay, interesting.

[real yacht]

how can FName be an int?

[ancient root]

Hello any one VR networking ? Im having this weird issue where my left hand has 2 meshes

[brazen glacier]

ty. https://docs.unrealengine.com/en-US/Gameplay/Networking/Actors/ReplicationPerformance/index.html

[bitter oriole]

@real yacht FNames are stored as hashes internally

[real yacht]

thnx

[viscid bronze]

Hello, I am using the Join Session blueprint function to join a Listen server in my project. I use player count as 2 and no dedicated server when simulating in Unreal Engine. There are 8 Player Starts on the map.

When one player hosts the game, he spawns in with his character blueprint, mesh and movement and all. But when a player joins the game, he spawns as a first person spectator like camera. Any debugs?

[ancient root]

How are you spawning them ?

[viscid bronze]

player starts placed on the map

[ancient root]

In any case go to gamemode and override the onPostLogin and handle your logic there what to spawn

make sure the default class is set right and if you dont want to use it define your own variable for which to spawn

and make sure there is 0 characters in the map to begin with

Because to me it sounds like there is a character in the map already, as it adds up 4 x 2 = 8

oh and on the GameMode run if dedicated server, if not then just call the parent function

[viscid bronze]

there is a character in the map already, but that's the host player, and it is his own listen server

[ancient root]

Delete it

the map must have 0 characters

all should be spawned

Through GameMode BP

http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

This should offer you some insight

[viscid bronze]

yes it is empty
but the client player still spawns as weird camera
all these are player starts

[ancient root]

Okay good now just do the thing i said above with the gamemode and you will be good

I on the otehr hand are having a much simpler issue I cant fix

[grizzled stirrup]

Does ACharacter::Restart only get called on the owning local client or on ALL client machines?

[viscid bronze]

is testing multiplayer listen server by simulating with 2 players with PIE (not standalone game) the same as actually doing it on 2 computers

[grizzled stirrup]

@viscid bronze It's good enough to test but it's of course better to always test frequently on the real thing

Especially with real latency and conditions

But generally things should happen the same way in PIE mp as they do in the real thing (in terms of making sure gameplay code is working)

[viscid bronze]

alright nice

thx @grizzled stirrup

[glad wharf]

afaik, PIE does not handle well session code and server travels

[bitter oriole]

It doesn't handle sessions at all

[grizzled stirrup]

Yeah doing sessions and seamless travel needs to be done with by playing standalone (which can easily be done with the PIE standalone button or unchecking "Use Single Process")

I kind of treat that as counting as PIE and actual packaged builds as not PIE

Of course if doing custom session stuff for a specific platform then the only way is to test with 2 computers on that platform

[viscid bronze]

so my create session and join session blueprint wont work when using in editor testing?

[bitter oriole]

Nope

[quaint viper]

Hello,
I have short question. Which Online Subsystem would you use for online shooter or do you think is the best

[worthy perch]

That's entirely a business decision, isn't it? Either way, the answer is Steam.

[quaint viper]

Well at the moment I still use steam for testing, but they are only test server.

[bitter oriole]

It's entirely a business decision

And I mean, there is basically one OSS on PC that's available

Two if you count the GOG-supplied variant that you can use if you sell the game there, not that it does as much stuff

[brazen glacier]

It is good practice to pass object refs into RPCs, or is that too taxing on net traffic?

The other option, as I see it, is to use Set Owner with callbacks, which could get messy when 2 players are trying to access the same object.

It's just a pointer, so it shouldn't be a problem, I think?

[worthy perch]

It's only 4 bytes.

[brazen glacier]

is it 4 bytes even with child classes?

ty btw, huge help

[worthy perch]

Should still be 4bytes. You can net profile it.

[silent birch]

What is the name of your game? Sold on which site? @naive crater

[ancient root]

Do no BP actors replicated ?

[twin juniper]

How do I spawn a player character pawn and possess it? I've created a loggedoutpawn which is simply a static camera and a login screen is added to the viewport, after logging in I want to spawn a character with a set of variables which comes from a text file on the server's machine and control it. Is this possible?

[twin juniper]

i think ive got i

[flint rose]

@ancient root , they should if you mark them as replicated

[ancient root]

I had to mark them through a EditorUtility actor because you cant edit on instance

Also can UActorComponetns have replicated variables

Because i have a comp inheriting from ActorComponent

and GetLifetimeReplicatedProps throws out a compile error

@flint rose thanks

[flint rose]

What's the compile error?

[ancient root]

SE_ThirdpersonTableController.cpp(264): error C3861: 'DOREPLIFETIME': identifier not found

Oh its because bReplicates is not teh correct variable to set right ? needs to be componentReplicates

nvm

bReplicates is correct in c++

@flint rose Yeah i was wrong bReplicates is indeed correct

[grizzled stirrup]

To apply the correct player skins and emotes, is it better to have the PS apply the skins to the characters via an On_Rep call when the skin for each character initially replicates down, or have each character get its skin from the PS on respawn (via Restart() so all clients see each others skins correctly)

Basically the question is: PS->SetSkinOnCharacter() vs Character->GetSkinFromPS()

I assume both work but I'm leaning towards the second option because it means there's less chance of it failing (PS might not have a character spawned in yet to set a skin on whereas a character will almost always have a PS to get a skin from)

[ancient root]

Nvm fixed

[flint rose]

Can I see the line?

[ancient root]

Its fine i fixed it had to rebuild

Was a pain do cuz its a source build

[gritty lodge]

Does anyone know how to "force" a spawned pawn to replicate before it is given commands? In my game I spawn pawns for all the players, have them possess the pawns, but they won't appear on each others clients until they begin moving.

[zealous saffron]

why are you spawning the pawns manually and then manually having PCs possess them?

[gritty lodge]

Compared to what?

[zealous saffron]

@gritty lodge the normal handling of spawning pawns.

so why do you need to have them spawn first then manually possess them?

do you have different pawn classes?

Do you want to view them before possessing (ie like selecting a character)?

[flint rose]

Is there an event that gets broadcasted after the game state has been replicated to the client? I'm trying to display a widget that shows all the connected players

[zealous saffron]

nope