multiplayer

[gleaming bobcat]

but this is very single player related

[manic pine]

maybe in the future it'll be easier to work with

[gleaming bobcat]

you can't slow time to other players 😃

Like in Matrix and all other ppl are affected by your pending skill 😃

[manic pine]

hmm do you know of any games where they use it extensively?

[gleaming bobcat]

basically this is typical for asia games

But check Lost Ark

its mmo arpg

[manic pine]

https://www.youtube.com/watch?v=Ys3mT7HJl8U

think this is root motion?

[gleaming bobcat]

they can't do this kind of things due to multiplayer but you can feel the style in animation

is it single player game ? If yes you don't have to care about replication and RootMotion > No root motion

[manic pine]

ye pure sp

[gleaming bobcat]

then its prety easy

everying looks fucking awesome

[manic pine]

yeah, no cheap animation blending or floatiness

like there's a weight to everything

[gleaming bobcat]

just play the animation created by animator that's it

I am not sure how effective could be play semi root motion based on animation flags and then using some interpolated movement

but it's still too clunky so basically in multiplayer we should avoid root motion (which looks cool) but use not root motion animation instead which can be semi-cool :0

[hasty adder]

Anyone ever do some kinda rcon admin type commands? Like maybe a parser for chat to allow admin to kick users or even allow console commands to be entered in ded server console@window

[twin juniper]

@hasty adder i have been working on this

it needs to be done using unreal's messaging system i believe

im planning on making a tool to manage large amounts of servers over the cloud

[hasty adder]

I see there skme@built in kick and ban functions never checked to see if they’re exposed to bp also they’re based on session. Not even sure my dedicated server is running a session tbh. Usually a client quick I always see a return no session to leave 😉

[next falcon]

This is Always Not Valid
can someone explain me why? and how could i fix that ?

[magic helm]

I don't think the game mode spawned the pawn yet when post login occurs, have you tried adding a delay loop just for test purposes

[next falcon]

Like this?
still not working

[magic helm]

No I mean using the original image, after the print string. Add a delay and connect it back to the Is valid node

But again that's for testing, I don't recommend using this permanently

[next falcon]

that gives infiniteloop

still not working

[magic helm]

Did you remove the while loop?

[next falcon]

yes

[magic helm]

But it shouldn't have given an infinite loop error because of the delay

[next falcon]

okay works now
but is there a way to use something permanently?

[magic helm]

In the pawn there is a On possess and a OnUnpossess event you can use that occurs on the server. You can just create a dummy pawn as the default one and tell it to destory itself on possess, I'm assuming that's what you would want?

[next falcon]

well yea somthing like that

ill try it thanks buddy

I tried this but still not working

[magic helm]

It might the spawn handling, where it's spawning inside of something so it's not gonna spawn... That sort thing

[next falcon]

the character is spawning but its ot possesing the character..

well with a little delay of 0.0000001 it works xD

[candid fox]

Could someone help me clear something up?

When i first start game my game state is: WaitingToStart
When i call Start Match on GameMode it will become: InProgress
When i then call EndMatch on GameMode it will become: WaitingPostMatch
And when i then ServerTravel to new match the game mode will have become None.

How do i transition from None to WaitingToStart?

Thanks for any pointers.(edited)
My goal is to be able to restart a match after it has ended.

[winged badger]

you can Handle one of the post match states

and server travel back to the same level from there

i don't think you can turn back the clock on MatchProgress tho

[candid fox]

ServerTravel is successful, all clients load a new level and spawn as spectators @ PlayerStart

But i can't call StartMatch after doing server travel.

I'm rather confused as how to solve this, i've spend a day googling and scanning forums and documentation.

[agile crane]

Hey! I'm sorry for ask help again but I have something that I really don't know if possible.

I know in multiplayer games the characters mesh are separate, there is like fps arm, and third person mesh, and in other people view they see our third person mesh, and so when you are in first person you can only see your arms and they cannot go through walls.

Is that possible in unreal engine? Cause I know in Unity its possible I believe.

[winged badger]

Why can't you call StartMatch? there is also a RestartLevel node that i never dared to use

@agile crane that just depends on where the player's camera is, and has nothing to do with multiplayer

[agile crane]

Hmmm no? How could I make two mesh? one for first person and one for third person, and in the other people views they see my third person mesh

[winged badger]

its the same set of meshes viewed from a different angle

[agile crane]

nope

In a multiplayer game, you actually setup two mesh, one for the first person camera and one for the third person view

If you play multiplayer games like real games you will see what I mean.

[winged badger]

shrug if you want to do it

check if Pawn is LocallyControlled

if it is, spawn the first person mesh

if it isn't spawn the third person one

(from construct or beginplay, otherwise the approach won't work)

[agile crane]

I mean, the two meshes are already in my pawn, I just need to check like, when in fps camera you can see the fps mesh and when outside and not using the fps camera you can't see it, or like, only the first person camera can see the first person mesh.

I don't really know how to explain tho sorry

and also the first person mesh is also supposed to be seen through walls, since its only visible with the first person camera with the first person camera you're supposed to see the mesh even through walls

so when you walk into a wall you'll always see the mesh

[winged badger]

in that case, say on Tick, again only if Pawn is LocallyControlled, check which camera the player is using and hide/show the meshes

[agile crane]

Ohhhhh

got it

[winged badger]

there is a small problem

if your server is listen server

[agile crane]

how could I see my first person mesh through walls also?

[winged badger]

since listen server doing show/hide the meshes will affect everyone

with dedicated you don't have that problem

[agile crane]

I don't use listen server nor anything, I only use hamachi and I make a premium hamachi server where when people can join it you could find my game servers

[winged badger]

i think its custom stencil something, outside of my expertise

depth

[agile crane]

What depth? Custom depth thing can only be with colors sadly, like green or something

[winged badger]

i did say outside of my expertise, so you got my best guess, i don't swear its accurate

[agile crane]

Okay, thanks also, what node should I use to check I'm in place for see my first person mesh?

last question

[winged badger]

you have to have some form of input that allows switching from first to third person view

[agile crane]

I have one already

[winged badger]

it should keep a state, enumeration or some such

[agile crane]

hmm

[winged badger]

so you just check the value of that state

[agile crane]

I don't really got it tho.

[winged badger]

can be a bolean if there are only 2 states

[agile crane]

I'm using tree cameras in my pawn, one for first person and one for third person behind and front view

[winged badger]

ok, so you make an enumeration

with 3 members

and when your player wants to switch to say, third person front view, you set the value of enum variable to ThirdPersonFront

and when you're checking if you are in first person mode you just check if your enum value == FirstPerson

[agile crane]

but, will it replicates to others? I don't want people to see my first person mesh, only third person

[winged badger]

you do the check only if the Pawn is LocallyControlled, remember?

there is no replication involved here

[thin stratus]

Well, OwnerOnlySee and OwnerNoSee

[agile crane]

Oh

[winged badger]

so the entire tracking of state is local for each player

and replication works only server -> client direction

not the other way around

[agile crane]

That OwnerOnlySee node... I never heard of that thanks

[thin stratus]

It's not a node

[agile crane]

Thanks ZLO and Cedric

I meant

button or smth

[thin stratus]

It's a setting on a Component

[agile crane]

Yeah

[thin stratus]

Your First Person Mesh would be OwnerOnlySee

[agile crane]

Yes!

[thin stratus]

While the Third Person Stays for all

But is indivually hidden for the Local Player

[agile crane]

yeah

Thanks for the help! Multiplayer is really hard for me

I don't really know how to make a multiplayer so its why

[winged badger]

takes some time to get used to at first

[agile crane]

True, but there are 3 things I don't understand and cannot fix

its 1; making an infection game type, 2 making a player list, its working but on others player info I see mine, 3, chat system

[thin stratus]

2. PlayerArray in the GameState

[agile crane]

Yeah I know, when there are 4 people I see 4 in the list and 3 its 3, but their info are the same as mine

like name and kills

[winged badger]

name is usually provided by local player

so you have t be on client-side execution when you GetName() for it to work

[thin stratus]

PlayerName variable

On the PlayerState

[agile crane]

I watched the Unreal engine 4 channels multiplayer tutorial for make my names save and variable

I don't know if its cause its outdated or what

[winged badger]

its not

[thin stratus]

It's shit

:P

[winged badger]

nothing significant changed, except for DefaultEngine.ini configuraton

since then

[agile crane]

Oh okay

I did the same thing with chat system

I watched their tutorial, doesn't work

[thin stratus]

It's a bad tutorial :P

[agile crane]

so.... its not working in my opinion

Sure thing

[winged badger]

the naming conventions in that thing made my remaining few hairs fall out

[thin stratus]

Replicated Variables in Widgets

GameModes

Etc.

RPCs in GameMode

[agile crane]

is there any good player name or list tutorial out there?

[thin stratus]

Random stuff ticked reliable

This tutorial is bad. Just that. It teaches wrong information

[winged badger]

there are some resources pinned on this page

[agile crane]

Got it.

[thin stratus]

Read my compendium

And do one thing at a time

[winged badger]

Cedric's compendium

[thin stratus]

Get the Player list working first

Then try to do the chat

[agile crane]

Yeah for make sure the save is working and name etc

but is there any good tutorial or marketplace things for that kind of stuff?

[winged badger]

you blunder thru it long enough and it starts to sink in, was how it went for me

[thin stratus]

I wouldn'T suggest marketplace if you haven o idea how things work

You'd just be overwhelmed

[agile crane]

Probably

I don't know if this object can be useful or not, and Idk how the chat player name is setup and Idk if its given inside of this object. https://www.unrealengine.com/marketplace/simple-chat-system

[thin stratus]

As said

If you ahve no idea how that works, don't buy it

No one needs to give you support for their marketplace pack if you can't program

Got that a few times with my lobby

If you don't understand how to properly RPC, don't buy my stuff ,cause I can't help you with that

So rather learn it first

And see the marketplace as a shortcut in time

Not a shortcut in learning

[agile crane]

True. But I know UE4 a bit, I have 3 years of experience (not in multiplayer tho)

[thin stratus]

Multiplayer is a second layer

[agile crane]

Indeed.

[thin stratus]

Takes a few months to learn

Or weeks*

[agile crane]

Well yeah.

Also... did I asked you once how do I make an infection game mode or no? Cause my game will be a horror game and its kind of the main thing I want to make

If I asked you already I won't bother ask again, just saying

hmm

[thin stratus]

Infection?

I mean the question is totally vague, that's like asking "How to make a Battle Royal" game mode

There are tons of things to do for it

If you need help, start on what ever you want to do and come back if you run into a problem

[agile crane]

Its a game mode where two people get choosen randomly or 1 at start of each round, all the rest I know how to do it

the people who get choosen randomly are infected

[thin stratus]

Well, just grab a random person from an array

Either the PlayerArray

[agile crane]

how...?

[thin stratus]

Or fill your own Array

[agile crane]

its what I never understand about array, which node should I get from array?

[thin stratus]

I thought you have 3 years of experience

[agile crane]

but I never did multiplayer things

but I know what is array kinda

[thin stratus]

Arrays aren't multiplayer

In your GameMode

[winged badger]

or from server perspective: GetGameMode->GetNumPlayers->RandomIntegerInRange->GetPlayerCharacter(randomresult)

[thin stratus]

You can store PlayerControllers when they connect

OnPostLogin for example

Or HandleStartingNewPlayer

And remove them when they leave

OnLogout*

And from that Array of PlayerControllers

You grab a random entry

And spawn the infected pawn

And the rest gets the normal ones

[agile crane]

I tried this https://gyazo.com/71b844c5928ef663559cab51fbad36fd

Doesn't work

is it normal?

[thin stratus]

Well yeah, that's totally wrong :D

[agile crane]

Can you explain something like ZLo did? like using > and say the node. Please, it will help me so much 😄

[thin stratus]

1. GetPlayerCharacter (as well as PlayerController) should always use index 0. This index is for LOCAL Players, not online*.
2. Second, you are using "GetPlayerController0" there, which, depending on what Side you are, is always the same person. E.g. if on Server, always the Server.
3. What BeginPlay is that? You need to use your GameMode Blueprint and setup an Array of PlayerControllers using OnLogout and OnPostLogin (or HandleStartingNewPlayer)
   You'd then delay the start and only start when everyone is connected. And when you then start, you grab an random entry from that Array of PlayerControllers and spawn a Pawn for them

[candid fox]

Hi, i'm sorry for double posting but i'm rather desperate.

Could someone help me clear something up?

When i first start game my game state is: WaitingToStart
When i call Start Match on GameMode it will become: InProgress
When i then call EndMatch on GameMode it will become: WaitingPostMatch
And when i then ServerTravel to new match the game mode will have become None.

How do i transition from None to WaitingToStart so that i could start match again after doing ServerTravel.

[thin stratus]

Usually you don't modify them by hand I'd say.

Using "ReadyToStartMatch" as well as "ReadyToEndMatch" is better

State going to NONE is not really good :/ Haven't heard of that yet

Or at least not that it's not going back

Usually when you ServerTravel you have WaitingToStart again after the map is loaded

[candid fox]

Gotcha.

I'm using Steam sessions and seamless travel.

[thin stratus]

Yeah, you aren't forced to use the GameState

I usually only use ReadyToStartMatch

To delay spawning

And have my own State for the overall game

[candid fox]

Right, thanks for input.

[agile crane]

I'm stuck here now Cedric https://gyazo.com/aa94457ad32b2133239e57a2fc64a3be

I don't know how do I do the random node in the array, I've searched but didn't find anything

What is the node I need to find for a random choose and how do I make a cast to infected and posses and how could it work for the choosen only? Cause if I do that posses everyone become infected

I'm waiting..... please help... thanks

Its the 3e part I really don't understand, could you help me more?

[winged badger]

you get an element from the array at random index

(random being from 0 to length - 1 ofc)

[agile crane]

I don't understand

[hidden thorn]

To me it looks like you don't understand how blueprints work rather than the system itself.

Looking at the picture I don't understand how to add a new element in the array (but in c++ I know)

[agile crane]

Oh ok, so I suck anyway

[hidden thorn]

Just find out how to make a dynamic array using blueprints

[agile crane]

mk

[worn nymph]

hello can anyone help i have a strange bug. im trying to add controller support to my game. everything works fine in editor but when i join a packaged game the controller controls both people yet if i use the mouse it only controls one person?

[pallid mesa]

Split screen?

Or...

[worn nymph]

no

and it is just standard inputs

here is video in beggining im using mouse and wasd . then soon as i use my controller they both move and attack at same time

https://www.youtube.com/watch?v=jU_ne8-QQYI

[mild hull]

could be that ue4 does only distinct between active window for mouse/keyboard and controller will be send to all, did you try on 2 pcs?

[pallid mesa]

Thats curious though I suppose you are not doing anything funky on your input system on the character

[worn nymph]

no none of my testers are online atm so cant test from 2 pcs

[mild hull]

VM? laptop?

[pallid mesa]

So should be about the input stack not refreshing appropiatedly for the local player on a controller situation

[mild hull]

i think ue4 simply reads controller input all the time while key/mouse gets only send to the active window

[worn nymph]

if that was the case though would be the same in the editor

[mild hull]

no there the editor manages the input and gives it to sub window

[pallid mesa]

If you want to test this appropiatedly open your controller class

And override InputKey

[worn nymph]

oh so hopefully 2 pcs and issue wont happend

[pallid mesa]

And check what key is being captured for each local controller

You can try aswell adding a IsLocalController on the input function

So you make sure that it is indeed an unreal bug

if(IsLocallyControlled()){ 
addMovementInputVector(...) 
}```

[worn nymph]

like that?

[pallid mesa]

Ayee

Now execute the code

[worn nymph]

ok ill repackage and try quickly

[pallid mesa]

👍 btw thats something dumb to do in this case, but that would make sure that only the local controller gets that input executed. So if you can still move the two dudes the problem is with input capturing internally on the engine

[worn nymph]

yep still doing it 😦

[next falcon]

Guys I have a replicated variable classarray in my playerstate
i want to access that variable in a widget but there is a error
i can get the length of the array but not the classes inside..
whats the problem?

(Markerd doesn't work)

[pallid mesa]

@worn nymph it wont probably happen on two different computers :P still a bug worth to report!

[worn nymph]

i hope so lol

[thin stratus]

@next falcon Can you print the Class name and also check if they are valid?

Don't know if class variables can be replicated

Would think they can though

[next falcon]

ill try it wait

no can't print class name

[thin stratus]

Hm

[next falcon]

and if that can't replicated how can i do something like that ?

[thin stratus]

Why is the class important on the client?

You'd usually save that stuff (item data) in a DataTable

And just replicate the Name of the row

[next falcon]

its a Researched items Array and i need it to display Widgets for them in a widget

[manic pine]

youre making a new class for every research item you have in the game?

[next falcon]

no i have Items as classes and they are in array and need to be displayed so i can craft them

[thin stratus]

Nope

@next falcon That's not the way to do it here though

Put the info and the class into a DataTable

adn replicate the row name

[next falcon]

Oh

okay ill change my full project now xD

[thin stratus]

:P

Good luck!

[next falcon]

xD thanks but i guess it will make my game not that laggy ^^

[thin stratus]

Well, Name Type variables are pretty optimized when replicating

And storing your item info in a look up datatable is handy :D

[next falcon]

what is a look up datatable ?

[thin stratus]

Just a datatable

[next falcon]

is there a good and performant way to safe actors ?
i mean if i save all that data and spawn it at begin it take a while until the array finished

[thin stratus]

:P Make sure the player sees a loading screen until that

[next falcon]

well that is the easy way 😄 other ways ?

[ripe raptor]

Is the owner of an actor replicated? Because it doesn't seem that it is

hm, it is

[jolly siren]

I have an actor with bReplicates = true. And in another class I have a pointer to that actor. If I replicate this pointer does it actually have to send the FNetworkGUID over the network? Or is the FNetworkGUID sent when the actor itself is replicated? I'm trying to understand if replicating the pointer actually sends anything over the network.

[manic pine]

i dont know, but i always thought it seemed logical that it sent a replicated object Id and that the client then translated that into a pointer to its version of the object

it has to send something

[jolly siren]

Right, I'm wondering if the id replication happens when the actor is replicated or when the pointer property is replicated. If it happens when the actor is replicated then there would be no additional overhead for replicating the pointer.

[manic pine]

yeah thats what i mean, that the pointer replication should just be 4/8 bytes or some such, i.e. a simple id

that references the clients version of the object

[jolly siren]

Right, it's a uint32 so 4 bytes

[manic pine]

yeah, thats all that should be necessary to replicate a pointer

anything else seems redundant and silly

but that also means we're limited to replicating 4 billion objects

;||

[jolly siren]

yeah, I'm optimizing projectile replication. So it's a pretty hot bit of code. Just wanted to get an understanding to which way that worked. I assumed it was replicated with the pointer instead of actor, but wanted to be sure.

[manic pine]

would need to be both yeah, server needs to tell client what Id to use for it on initial replication of the actor

then replicated pointer just uses the value

if i may ask, how are you doing prediction for clients/server(if at all)? all i see are problems

with projectiles

im doing an explosive force mechanic for the projectiles, but i just cant figure out a way that it ends up well for all parties

[jolly siren]

I have various conditions that can trigger a projectile (hitting player, hitting actor, player input, duration, etc.). I replicate a bool when it is triggered and then do logic on server and client depending on what type of logic is needed.

Right now I'm replicating a int32 for the count of projectiles instead of the pointers because I was worried about instances where a ton of projectiles are spawning at the same time. Which is why I was asking about the Network guid stuff

[manic pine]

right, but lets say someone shoots a projectile at you

with a naive approach, no prediction, you are already hit on the server by the time you see it hit you on the client

if you forward predict the client's replicated version by ping/2, you will see the server's location of the projectile, but any dodge movement you perform wont reach server before another ping/2 passes, so you'll be hit even though it looked like you dodged

if you forward predict by the full ping, you will see the projectile ahead of the server and can dodge it... but it could lead to all sorts of weird stuff in terms of that projectile hitting someone else

[jolly siren]

Are you using projectile movement?

[manic pine]

i am, but its more the principle im talking about

[mild hull]

how do you want to predict the projectile before the server tells you?

[manic pine]

in my case the projectiles all have a constant velocity vector, so predicting forward in time is as simple as doing movecomp->tickcomponent(predictiontime)

[mild hull]

why not have game time and base its position based on that?

[manic pine]

that would be the non-prediction approach

while prediction is gametime+predictiontime

my original approach was to have shooter fire, then server receives command and does tick(shooterping/2) to match shooter's location for projectile

then other clients did another tick(nonshooterping)

that works great for dodging and, in my case, shooting down projectiles... but it fails in terms of the other simulated clients

forward-predicted rockets end up hitting(but not server-hitting) not-predicted simulated actors

with no forward prediction on server, shooters aim will be ping dependent... with no prediction on other clients, they'll be hit on server despite dodging client-wise

sad

[jolly siren]

I guess I just don't understand why the ID would need to be sent again when replicating the reference. The actor and ID must already exists since they have already been replicated. I'll do some digging and testing

[manic pine]

that is whats replicated, afaik

a single 4byte value to identify the object... obviously it cant send the pointer value itself, since that refers to memory on the server

[jolly siren]

Right, but when the actor is created. It is replicated to the clients and created on them. So I don't see why replicating a pointer would need to send anything additional.

[manic pine]

you need to tell the client what the value of the var is right

imagine the pointer starts out as nullptr... so when the object that has the pointer is replicated, nullptr will be replicated initially

then, server sets the pointer

now, client needs to know what server set it to

but it cant send the memory address, because memory layout is different for server and client

so it resolves the pointer, finds object id, sends that

[jolly siren]

ActiveProjectiles.Add(Projectile);
ActiveProjectilesCount++;```

This is what I am doing currently. ActiveProjectiles is an array of projectile pointers and isn't replicated. But the projectile actors themselves are replicated.
And ActiveProjectilesCount is a replicated int32 which is the number of projectiles currently spawned.

I was trying to avoid replicating a separate ID (int32) for every single projectile. Because in cases where a ton are spawning at the same time that is pretty heavy vs a single int32 that just represents the count.

[manic pine]

what exactly would oyu need the ID for?

and the count

i dont quite see what youre using it for, which is why i struggle seeing the problem i think

are you trying to match them to client-made fake projectiles?

depending on your exact mechanics, that count could be highly unreliable when replicated

[jolly siren]

Yeah, it looks like I'm not really using the count much anymore. It's only used for checking to see if certain abilities have any projectiles in the world. For example, I have an ability that triggers a c4. I check whether the player has spawned any c4 projectiles. And if not then I disable the ability icon for that trigger.

But yeah I know it's not really reliable. That is really the main reason I went with it because I wanted to be lighter on the network. I guess I'll look into just replicating the pointers and killing that property.

[manic pine]

it should work fine for that usage, though if its only use is as a boolean, it would be much cheaper if defined as that

its arguably something that could be kept entirely client side though

[jolly siren]

Right, yeah that's how it is used for now. I think I was planning ahead and trying to be flexible when I designed it. But it has been refactored several times and I didn't realize that is all I was using it for still.

Ahh so increment a count when you toss a c4 clientside. Yeah I would agree with that

[manic pine]

yeah, in e.g. beginplay on client it adds to counter, and in endplay it detracts, or osmething like that

what were you planning on using the IDs for though?

[gleaming bobcat]

Anybody know how I can fix root motion of my Montage with high latency (250+) when the server is correcting final position of player on Autonomous_Proxy side ?

[jolly siren]

Well more the pointer than the ID. There are various times where it would be nice to have the pointer clientside. I need to study my code some more tho and decide the best way to handle these. It's been a while since I wrote this code 😛

[manic pine]

keep in mind, beginplay fires for replicated projectiles/items too

so if you do a if(!HasAuthority()){add projectile to some kind of projectile container on client}

[jolly siren]

Right, yeah that makes sense. That might be all I need. I'll look into it and might ping you some time once I have a better understanding of my own code haha

[manic pine]

yeah, just remember in those cases that if/when that projectile is destroyed by server

the pointer in the container will become null (if container is UPROPERTY)

so you'll have to go through it and remove null references now and then

maybe remove projectile from that container on projectile's endplay

managing references is a mess eh

[winged badger]

that !HasAuthority would break the host playing on ListenServer

[manic pine]

yeah, if doing listenserver it might be more suitable with if(!HasAuthority() || !IsRunningDedicatedServer())

[winged badger]

IsLocalController / IsLocallyControlled

is my preferred solution for Tick and BeginPlay when i want something only on local machine

[manic pine]

right, but that only works if it has a player owner

which may not be the case

[winged badger]

checking PlayerController(0) usually does work

well, strike that

[manic pine]

yah, it need not have an owner at all

[winged badger]

Controller(0) tends to be a local controller always

except on dedicated server

[manic pine]

but if the actor doesnt have an owner, then it also has no controller

[winged badger]

true

managed to confuse myself just now 😄

[manic pine]

haha yeah, all this ownership and networking stuff goes in circles

[gleaming vector]

The 0th player controller is always the local controller on the client

[opaque seal]

And should typically be 0 as well on the server, for the server, if it's a listen.

If you're spawning actors from other actors (etc) and lose ownership along the way, you can always use the Owner/Instigator pins on spawnactors.

Specifically, at times I need to pass along the playercontroller between blurprints till it's fed into my spawnactor nodes. Depends how you're going about your code.

[magic crest]

Hey guys, can someone help me out a bit with steam online subsystem?

I've set it up and I can host and join sessions. All works well when using the null system. However, on steam, once a client joins a session, no other client can get that session in the find sessions results.

Problem is, I never called StartSession() - so I see no reason why the session would not appear in the search results.

[magic crest]

Noone? Anyone?

[ripe raptor]

There's a 50/50 chance my clients will play my montage animations

and I can't for the life of me figure out why

[light grove]

Try calling it with a reliable client function?

@ripe raptor

[ripe raptor]

I do that already, but I think I've found the culprit

[lost inlet]

is there some trick in having an actor that exists in the map to only be clientside?

i'm disabling replication and tearing off, but it gets removed from clients when i destroy it serverside

[light grove]

Are you trying to set replication to false during runtime?

[lost inlet]

in OnConstruction it's setting bReplicates, the same actor is designed is designed so that both can be supported

[manic pine]

disabling replication before tearing off?

[lost inlet]

tearoff + setlifespan(0.5f) in beginplay seemed to work

[manic pine]

shouldnt it be the other way around, so that client is notified of tearoff?

i believe tearoff takes care of disabling replication anyway

[tall grove]

@magic crest same issue for me with steam

[worthy wasp]

is there a valid difference between Deactivate() and DeactivateSystem() for UParticleSystemComponent in terms of NetMulticast functionality?

i cant get LOCAL veresion of this to DeactivateSystem() - keeps going but the NMulticast works fine

[sterile silo]

Hi! Is there any good tutorials or resources out there for using steam with C++. Currently I am just trying to start off by getting the players name from steam and displaying it in the UI.

[fossil spoke]

The name property on the PlayerState is filled with the users Steam name.

[sterile silo]

I guess I am more confused on how to exactly begin access that.

From within C++, I've tried Googling but everything seems either outdated or just not what I'm looking for. @fossil spoke

[fossil spoke]

The Steam subsystem already populates the PlayerState with the users Steam name, all im saying is that you dont have to do that yourself.

There are some free community projects like the AdvancedSessions plugin that you can download which use Steam

I recommend you grab those and analyse the code to see how they are using Steam.

This is better than trying to find tutorials as there is probably no good ones around.

[magic crest]

@tall grove Hey. I'm trying to get to the bottom of the problem. Trying out various scenarios...

[zinc loom]

is there anything bad replication wise about putting health and inventory in PlayerController instead of the pawn? I'm using shootergame as a base, and destroy my pawn when it enters a vehicle, but want to retain health when I spawn a new pawn on exit

[fossil spoke]

@zinc loom Nothing bad no, just unorthodox. It would probably serve you better to have it in the PlayerState instead, that way if needed other players have access to the Health of an Player in order to be able to display on Screen or some such

[ripe raptor]

hm, if I want to kick any player that joined the match after it went from Pending to InProgress, easiest place is to override ApproveLogin() in a custom gamesession class, yes?

[zinc loom]

cool, i'll put it there instead, cheers @fossil spoke

might re-evaluate my sanity and look at using gameplay attributes for it

[fossil spoke]

@ripe raptor Sure, just make sure to return an none empty string

AGameModeBase::Login() uses the ApproveLogin() return value to determine whether or not to Spawn an PC for the incoming player.

[ripe raptor]

Yeah it's what I'm trying to do... but stupidly enough I can't seem to find a way to get the current session state from AGameSession

[fossil spoke]

Session state is held on the GameMode from memory?

AGameSession is just an wrapper for the session interface

[ripe raptor]

It's the EOnlineSessionState::Type in FOnlineSession

[fossil spoke]

Ah

Oh my bad i was thinking of MatchState

haha

[ripe raptor]

I could go through the ISessionInterface but that seems wrong when I'm already in AGameSession

IOnlineSession*

actually I'm being silly, that's exactly what the session does

[magic crest]

Does anyone know why a session would not appear in search results after 1 client joining?

I have a session that has 4 public connections. I host it with 1 client. have another client connect. After that happens, no other client can see the session in search. Note: StartSession() was not called.

also, works fine with null system. problems arise on steam

[hasty adder]

so blue print open level seems to keep the same gamemode instead of using the map ovveride?

wait maybe wrong looking at this wrong

[magic crest]

I never had an issue that the game mode override was ignored

[hasty adder]

chasing dragons. trying to figure out why my ai isn't runing when i go from main menu to level select and load the level.. trying stand alone

must have somethign to do with how i open level

[hasty adder]

i see its not generating the navmesh on load.

[raven holly]

https://clips.twitch.tv/HandsomeSullenSushiOhMyDog

anyone know why the landed event wouldnt be called in this instance?

The movement controller gets stuck 'in air' 🤔

[thin stratus]

@magic crest StartSession wouldn't cause that anyway

It's even called by default when you create a session via epics code

[magic crest]

Thanks. So, gathering information from various sources (this Maksim Voitkevics dude from facebook group is awesome) revealed that in order to use traveling properly, we need to use the ?listen parameter, which in turn makes the session InProgress on creation (still don't know why the session is initially visible to clients, until one joins). So, what I have to do is make it AllowJoinInProgress true and then update the session once the host player decides, ok - no more connections, we go play

[magic crest]

Alright. Apparently, ?listen parameter of the Travel function makes Steam online subsystem implementation implicitly calls StartSession when someone joins, putting it in a state of InProgress, which in turns makes it invisible in the search results if it's set to bAllowJoinInProgress = false;

Using UpdateSession, we can change the allowJoin and truly make the game InProgress for the rest of the world

[magic crest]

Finally got it working. My client can now join, leave and re-join. Other clients see the session in results. Life is good.
One minor thing though, the session is not updating number of players that have joined.

[nova sky]

vlePa Do you have empty project with created steam dedicated server? I have problem that i can't find my servers if subsystem steam = false; and after it set true i can't join to server using ip. Who can help?

[jolly siren]

That isn't a problem. That is expected.

[nova sky]

Now i have this Error

[jolly siren]

And that one is just a warning

[nova sky]

Ok start with disable steam subsystem

Am i right, that without steam subsystem i can't find my session from another pc?

[jolly siren]

With null you can connect via IP

With steam you connect via sessions

[nova sky]

Yes

But with stream enable

i can't find session + can't connect using ip

i tried i local net and on hosting with opened ports

[jolly siren]

Yeah you shouldn't be able to connect via IP. But you can find sessions if you set it up correctly.

[nova sky]

I can't

[jolly siren]

right, you haven't set it up correctly

[nova sky]

And i need in help

))

[jolly siren]

what does your RegisterServer function look like?

[nova sky]

I am using Find BP to find session

[jolly siren]

that looks fine

does the Find BP node take params?

I'll need to dig into that. I use c++ for that

[nova sky]

No

[open gazelle]

I everyone! Dont know if I am in the right channel, but anyway 😃

I am working on a multiplayer game which will hold around 20 players per game.
I am currently trying to figure out what the smartest way would be to orchestrate the "dedicated unreal servers". Is there anyone who has any experience putting the unreal servers into containers and orchestrate them with e.g. kubernetes? Drawbacks?

[nova sky]

How can i search it using c++

?

Can u send me examples link or pic

?

[jolly siren]

void AFPSGameSession::FindSessions(TSharedPtr<const FUniqueNetId> UserId, FName InSessionName, bool bIsLAN, bool bIsPresence)
{
    // Get the OnlineSubsystem
    IOnlineSubsystem* OnlineSub = IOnlineSubsystem::Get();

    if (OnlineSub)
    {
        // Get the SessionInterface from our OnlineSubsystem
        IOnlineSessionPtr Sessions = OnlineSub->GetSessionInterface();

        if (Sessions.IsValid() && UserId.IsValid())
        {
            /*
            Fill in all the SearchSettings, like if we are searching for a LAN game and how many results we want to have!
            */
            SessionSearch = MakeShareable(new FOnlineSessionSearch());

            SessionSearch->bIsLanQuery = bIsLAN;
            SessionSearch->MaxSearchResults = 20;
            SessionSearch->PingBucketSize = 50;

            // We only want to set this Query Setting if "bIsPresence" is true
            if (bIsPresence)
            {
                SessionSearch->QuerySettings.Set(SEARCH_PRESENCE, bIsPresence, EOnlineComparisonOp::Equals);
            }

            TSharedRef<FOnlineSessionSearch> SearchSettingsRef = SessionSearch.ToSharedRef();

            // Set the Delegate to the Delegate Handle of the FindSession function
            OnFindSessionsCompleteDelegateHandle = Sessions->AddOnFindSessionsCompleteDelegate_Handle(OnFindSessionsCompleteDelegate);

            // Finally call the SessionInterface function. The Delegate gets called once this is finished
            Sessions->FindSessions(*UserId, SearchSettingsRef);
        }
    }
    else
    {
        // If something goes wrong, just call the Delegate Function directly with "false".
        OnFindSessionsComplete(false);
    }
}```

it's essentially just this https://wiki.unrealengine.com/How_To_Use_Sessions_In_C%2B%2B

[nova sky]

It's should be in my session class?

[jolly siren]

yeah

I would follow that wiki

[nova sky]

Ok

I try to do it on c++

[jolly siren]

okay, just make sure to use false for isLan and isPresence stuff obviously.

good luck

[nova sky]

I remembered that in one guide man added code

Super::RegisterServer();

In RegisterServer

And it started finding his session in Lan

but he didn't use steam api

what does this code do?

[jolly siren]

yeah I don't call super there

so you don't need that

[nova sky]

I am compiling server and try to find it in lan

But on weekends it didn't help me on hosting

In config or code?

void UNWGameInstance::OnCreateSessionComplete(FName SessionName, bool bWasSuccessful)

is it necessarily to use

this func?

I see here used Session->StartSession(..);

[nova sky]

What can mean this warning ?

LogOnline: Warning: STEAM: Server setting ,SESSIONFLAGS:523 overflows Steam SetGameTags call

[jolly siren]

How do you guys handle lag spikes with character movement? It's pretty easy to reproduce times where you jerk forward on the client. All I have to do is net pktlag=50 and net pktlagvariance=200 to simulate spikes and then sprint around the map and you will jerk forward certain times when it spikes. I thought character movement did smoothing? I can reproduce this in shootergame as well.

@winged badger we were talking about this a week ago. I looked into it a bit more and it's definitely not my service provider because I can reproduce it locally with pktlagvariance. With both my project and shootergame.

[twin juniper]

Is 200 a realistic value for ping to suddenly change?

Does it happen with netpktlag = 200 and lag variance to 10?

[jolly siren]

Spikes are definitely happening in my real world tests. Somewhere between 5 - 10 per match.

[twin juniper]

Also does it only happen when sprinting or even regular walking (if you put up the default max walk speed in the CMC)?

[jolly siren]

It happens with normal walking too. Seemingly less frequent, but it still happens.

[twin juniper]

And you aren’t bumping into anything / interacting in any way, just running on flat ground?

I had issues before but haven’t tested lag variance that high

[jolly siren]

I'll try and reproduce on flat ground.

[twin juniper]

Any bumping / falling etc always has some error for me

Should be silky smooth on flat ground though

[manic pine]

the problem is that the original CharMoveComp is not deterministic

[jolly siren]

Just tested and it's not. I walked (without sprinting) and away from any objects with lagvariance set to 200 and it is very jerky

[manic pine]

it has several issues that makes client and server simulate a move differently

[jolly siren]

I ran those tests on shootergame, just to make sure it's not anything with my project.

no idea how reliable this test is but according to it, large spikes are realistic

https://ping.canbeuseful.com/en#ping

[bitter oriole]

Yes this is realistic

[jolly siren]

Okay, that's what I thought, because I am experiencing them a handful of times throughout matches. And the jump in movement is pretty disorienting.

[bitter oriole]

No perfect solution, you can modify your player movement so that server resets are smoother

If you used to get rep updates every 50ms and you suddenly have a 200ms hole, then when the next event comes and reset you to a new state, interpolate over the next 200ms toward that state

It gets complicated quickly, but there isn't a simple prediction model that works really well :/

[jolly siren]

Right, yeah something that at least smooths it out should be good enough. Movement is just way to jerky atm when spikes happen.

I'll take a look at UT and see if they handle this somewhere.

@rough iron have you coded solutions for this?

[quartz vector]

How does Ownership work with an Actor that is placed and not spawned into a level?

[twin juniper]

@jolly siren also would be interested in solutions!

[quartz vector]

if Server owns that Actor.... the only way to call server RPCs then would be through something that has an open channel for replication correct?

[bitter oriole]

@jolly siren I've done something that works well but I'm doing slow vehicle movement with a custom movement component, so it works with less complexity overall - though I ended up with three separate movement code paths

I expect the character movement to be good, but it's pretty huge and hard to tweak

[twin juniper]

I find tweaking the smooth time / distance does pretty much nothing, it always jerks back

I guess that is used more for very small adjustments

[bitter oriole]

To be honest I suspect you can't make something that doesn't

You just can make it smooth and rare

[jolly siren]

It's rare enough where smoothing is fine with me. It just can't stay as is.

[bitter oriole]

Is it a character based game ?

[jolly siren]

yes

Character based fp shooter. So it's pretty jarring when it happens.

[bitter oriole]

So using the Character class from UE4 with the Epic movement component

[jolly siren]

yes

[bitter oriole]

Yeah, I'm not familiar with it

[jolly siren]

It looks like UT does some smoothing here

https://github.com/EpicGames/UnrealTournament/blob/fcbf041bf911aef645bff42ecb397c969a585711/UnrealTournament/Source/UnrealTournament/Private/UTCharMovementReplication.cpp#L125

quite a bit of movement code in UT

[bitter oriole]

Uh, it looks like UT has a brand new movement class

[jolly siren]

well they inherit on top of Epics

[bitter oriole]

Yeah, but I see lots of networking stuff in here that also exist in a different form in the parent class

[jolly siren]

damn

[bitter oriole]

Looks like there is a system for sending movement frames & ack etc

void UUTCharacterMovement::SimulateMovement_Internal(float DeltaSeconds)```

^ basically that reads like "fuck UCharacterMovementComponent, let's do it ourselves"

Though it keeps the state machine

[jolly siren]

lol wonder why they didn't just fix UCharacterMovementComponent

[bitter oriole]

I don't

Wouldn't be surprised if PUBG uses UCharacterMovementComponent with zero change

Or half UE4 games for that matter

Improvements for UT might just be an annoying change elsewhere

[jolly siren]

Yeah, I'm fine with most of it. I don't really notice simulated clients jerking. It's probably not as noticeable because it's not from your perspective. It's mostly just the local client I'm worried about.

[nova sky]

Ok i didn't fix problem with session finding

can somebody check

[jolly siren]

why aren't you forwarding port 7777?

@nova sky

[gleaming bobcat]

Hello, How I can effectively change a speed of character when the latency does not affect the delay on Autonomous_Proxy side ?

[twin juniper]

stupid question: how long will I need to make this online game? https://www.youtube.com/watch?v=0jS2j97wEGY(edited)

[hazy haven]

@twin juniper that depends how good at coding you are

@gleaming bobcat inherit from the CharacterMovementComponent class, and use some of the spare flags to set movement speed

[versed rock]

Hello Everyone, I'm trying to get multiplayer movement working, pretty much, my character is a pawn (sphere) with physics. You click space you get pushed the way you are looking.

Player1 = server
player2 = client

Player1 moves around and player2 can see it
player2 moves around and player1 cant see that they have moved, still in origional spawn
if player1 hits player2, player2 cant move.

I can't see, to wrap my head around replication

[fossil spoke]

@Stewie#0986 The rules seem relatively simple, depending on your skills it shouldnt take to long.

[versed socket]

@twin juniper That's a really good idea, dude! Players in 1st person view and Spectators in Top-Down 3rd person view. Sounds like a great game jam or portfolio project.

It's a little bit like that Friday the 13th game but with fewer gameplay mechanics and features. Still a very fun idea regardless!

[versed rock]

Anyone have any idea what im doing wrong?

[versed socket]

@versed rock The reason is because the physics stuff is running only on the client that presses the Spacebar. What you need to do is make the Spacebar ask the server to do the physics push for it instead.

What that means is you gotta make a new custom event, set it to "Run on Server", call it on Spacebar, and then make your new custom event do the physics thing.

[versed rock]

Would i do the custom event in the player still?

[versed socket]

Yeah you do it all right there in that picture you posted

Just hook up that physics thing to a new custom event, and make the spacebar actually call it. The important part is that the custom event is set to Run on Server.

If that still doesn't work then it means that for whatever reason your Pawn's physics are not being replicated, in which case you probably have to add that Pawn Movement Component and then instead of doing the physics thing you just add movement input or whatever to the component instead of doing it through the built-in physics thing.

[versed rock]

Ahh i see

So ive got this now

only problem im having now is on client when you click SPACE it will go only at angle 0,0,0 not where you look

So its related to the get control rotation

[versed socket]

So probably you haven't replicated the pawn's rotation stuff somehow, which is the new problem.

Since it's a Pawn, maybe try doing Get Pawn Rotation instead of Get Control Rotation nevermind that won't work if you want to have that free third person camera, which it seems like you're trying to do.

[versed rock]

That should be okay to do the get rotation etc on client and then send it to server then server just runs the push pawn?

That works ingame but just want to make sure that it isnt a bad way to do it

[versed socket]

Not a bad way at all -- normally you just need to check a box or something somewhere to replicate the control rotation but w/e you're doing it manually so who cares.

In general, if it works don't question it until you're done with everything else in the project and you want to start polishing everything. That's when you can start to worry about whether something was done in a "good" way.

[versed rock]

Okay Thankyou so much, just started learning unreal about 3 weeks ago

[gleaming bobcat]

@hazy haven You mean to use FSavedMove_Character something similar lke DoJump() is implemented ? I need to change dynamically character movement based on Curve asset. Is the FSavedMove_Characeter way to go then ?

[gleaming bobcat]

And use available custom flag ?

[magic crest]

Hey! I have a multiplayer scenario where an actor spawns his weapon on begin play. This is done by the authority. All is well, until it goes to steam. What happens is that the 3rd joining player, on his machine, seems to control the gun animations of the 2nd player.
Where should I start digging for the problem?

[stiff field]

hi, all!! I have question, when i try restart game by call method GameMode->RestartGame() other player is disconnected. i just try it in editor without online subsystem.

[nova sky]

is it necessary?

[fossil spoke]

Port 7777 is the default port that UE4 uses for network communication

[bitter oriole]

Though you shouldn't need to open ports if you're using Steam, right ? Nat punch and all that

[ripe raptor]

Hey, quick question

In my player pawn, when I leave the game, I called Destroy Session followed by this:

To remove the player from the server as well

but that doesn't seem to quite work as it apparently destroys the entire server session, making it cease to appear in the server browser and stops other players from playing

Am I missing something or is that not the correct approach?

[thin stratus]

Call DestroySession in the MainMenu

So each client handles that themselves

[ripe raptor]

I don't have to call DestroySession server-side for the controller?

Talk about a misconception

[magic crest]

I was told to (on client) trigger a leave game function where I call DestroySession and when the delegate fires, PlayerController->ClientTravel() back to main menu

works fine

[ripe raptor]

does it make a difference whether you first destroy session and then travel or travel then destroy session?

[magic crest]

I was told to first destroy, then travel. But, I'm guessing you can travel and when new map is open, destroy. However, do not attempt to do the other before the first thing completes

it failed for me if i wanted to destroy, then immediately travel and then receive the destroy callback

the documentation explicitly says, wait for the delegate first before attempting anything else, because there are some other stuff the engine has to do before continuing with your new requests

[jolly siren]

@I am Bodya#4511 yes it is necessary

[twin juniper]

@versed socket i have a lot easy to make games with a lot of revenue as a result, problem: i aint game dev

[nova sky]

ok I will try than I will arrive home

[twin juniper]

@Kai#5929 Kai - Today at 3:06 AM
@twin juniper that depends how good at coding you are - i am bad at logic.
regarding: Stewie - Today at 1:17 AM
stupid question: how long will I need to make this online game?

[magic crest]

Hi. I'm having a problem in multiplayer. The 3rd client that joins appears to control the animation of the 2nd player's gun. Where might I start to investigate. Note: Happens in standalone on steam, not in PIE

[bitter oriole]

@twin juniper Basically multiplayer doubles the amount of work

[magic crest]

@bitter oriole maybe even triples

[graceful cave]

ive been having an issue for a while and stil cant find a solution -
the listen server's framerate becomes the tickrate for network communication and having my framerate capped at 144 or higher will cause a lot of issues for clients, dropping a lot of non reliable rpc calls and lagging movement

capping at 60 solves the issue but obviously isnt a good solution

i have NetServerMaxTickRate set to 60 in the engine ini but it doesnt change anything

currently using online subsystem NULL, not sure if that would cause that setting not to work

[twin juniper]

@bitter oriole this is not good, because i don't have singleplayer game ideas

not a single one for which I would give my life

[magic crest]

satan: welcome to hell of online subsystems 😃

[bitter oriole]

@twin juniper It's not good or bad, it's just how it is

[twin juniper]

so what should i do

[bitter oriole]

The reality of being a single developer is that your ideas should adapt to what you can do

[twin juniper]

my life would be empty regarding your answer

[magic crest]

@graceful cave I myself am having a problem with improper replication when on steam. works fine in NULL, but on steam stuff gets swapped. I'm not sure whether it's due to packet loss or what. Don't even know where to start digging.

[graceful cave]

i havent actually tried steam yet because enabling seamless traveling prevents even the host from loading the next map

[bitter oriole]

Design your game according to what you can do @twin juniper . Not saying I do this well myself, since I'm on my 4th year working on my game and it took more than three to get on Steam... But it's what we all have to do

A huge majority of game projects are never finished

Like, 95%

We all pick something way too hard as a first game project

I even picked something too hard for my second 😃

You can do a multiplayer game alone but be sure to make it incredibly simple

Like, not a shooter

[graceful cave]

cant say picking something "too hard" is a bad thing considering itll force you to learn

[twin juniper]

but as you see the maze game is everything but not hard.... can't compare this to HEY I WANNA MAKE GTA STYLE GAME

[bitter oriole]

@graceful cave So, would you start building a space shuttle ?

[magic crest]

Yeah. ought to make wow as my first project

[graceful cave]

programming and engineering arent quite the same lol

but resources are easy to come by for programming

im making a multiplayer arena fps as my first game and its about 90% done

if i started over from scratch some things would look different but most of the early stuff has been overhauled

[magic crest]

@graceful cave Did you start with a template or blank?

[graceful cave]

actually i bought exi's lobby system

which during the development process i had to either modify or understand the majority of the classes provided

so it helped me learn a lot

[magic crest]

as usual 😃

[graceful cave]

i could remake something similar now if i had to

[magic crest]

I'm just wondering. Whether people tend to go blank or start with a template.
How's your knowledge on replication?

[graceful cave]

good enough ig uess

[twin juniper]

people who start bblank... are crazy

[magic crest]

I'm having a strange issue and can't seem to get to the bottom of it

[graceful cave]

i can make things happen that need to happen

[magic crest]

Stewie, I disagree... There is a LOT of things setup on a template, 80% of what you dont even really need, or is simply implemented wrong (for the sake of example simplicity)

[graceful cave]

yeah i think blank project is the way to go once youve learned enough

[magic crest]

@graceful cave here's a quick scenario. An actor spawns a weapon on beginPlay (authority). It all replicates fine when NULL system. On steam, when 3rd player joins, he seems to control the 2nd players gun. Like, when I sprint, I see 2nd player's gun animated as if he is sprinting

[graceful cave]

not sure about any issues steam would introduce because i havent included it yet

so if you test in PIE with 3 clients it wont happen?

[magic crest]

Exactly.

[graceful cave]

my only guess is that someone is loading in slower and the beginplay isnt properly running on the owning client

try replacing some beginplay functions with a possessed event

and start it with a DoOnce that doesnt reset

in case the actor is unpossessed and possessed again

at a later point

[magic crest]

The owning client doesn't really do much in begin play. He waits for the weapon to get replicated and attaches it to his body.

[graceful cave]

right but the server might be running that function before the client possesses the actor which can cause certain things to get weird

[magic crest]

aha

Would explain why pie works, as there is no network data travel (correct)

?

since, all the instances are the same computer

[twin juniper]

@graceful cave since when are you programming. since when are you working games in general. since when do you work on this 90% done online game?

[graceful cave]

they would all load in at the same time in PIE

[magic crest]

ALso, I receive OnRep before BeginPlay on the joining client.

[graceful cave]

@twin juniper i started with ue4 in january but i have a lot of map making experience for all UT games so i already knew how to navigate the engine

[twin juniper]

but not how to make logic ;D

[graceful cave]

my only real programming experience was warcraft 3 mapping and a little c++ in high school

but warcraft 3 mapping is the same as programming

just simplified

btw if youre making multiplayer game

thatll help you a lot

it can simulate ping for clients to help you optimize your netcode

[twin juniper]

doint need that now XD

[graceful cave]

that was for @magic crest lol

[twin juniper]

i am also making one 😮

[magic crest]

@Satan what's that?

aaah. a simulator. right

[graceful cave]

yeah because the editor only allows you to see IF things replicate between clients

but any real online scenario will involve ping

so it allows you to tweak your RPCs to optimize the game for actual net play

[magic crest]

I see. thanks. Ill go look at that possess event

So, basically what you're saying is that once I receive the possess event on the client, I RPC SpawnWeapon instead of Spawning it the moment the server spawns the pawn

Which is, in my case, as per design. Since, our characters enter the game with no gun.

I'll just make an action 'Equip/Unequip Weapon' and see if that makes any progress

[jolly siren]

Anyone with a good CMC understanding know what all this smoothing code is supposed to be doing? And all these smoothing properties? Because it doesn't look smooth at all for local client when dealing with lag spikes.

[twin juniper]

@jolly siren no matter how high I increase the max / no Smooth distance and increase the smooth location times to unrealistic amounts, I still get instant pops

[jolly siren]

Yeah, digging through the code I think that this smoothing might only be for simulated proxies or listen servers

[twin juniper]

Ohhh interesting

That would make sense as I remember doing a lot of testing and seeing no change

Never looked at the simulated proxies

And always had it on dedicated server mode

[jolly siren]

https://github.com/EpicGames/UnrealEngine/blob/dbced2dd59f9f5dfef1d7786fd67ad2970adf95f/Engine/Source/Runtime/Engine/Private/Components/CharacterMovementComponent.cpp#L6663

Yeah, I'm on dedicated servers too. And the smoothing I'm trying to do is for the local client

https://github.com/EpicGames/UnrealEngine/blob/dbced2dd59f9f5dfef1d7786fd67ad2970adf95f/Engine/Source/Runtime/Engine/Private/Components/CharacterMovementComponent.cpp#L8417

[zinc loom]

It's midnight and I have hazy memory, but from what I remember smoothing only happens on simulated proxies and if you're getting popping on a local client it's because the server thinks the actor has moved too far since it's last recieved update so it tells it to move back

[jolly siren]

Right, yeah it looks like smoothing isn't there for local client with dedicated servers 🙁

So spikes like this look horrible from the local client's perspective

Easily reproduced in shootergame with net pktlag=50 and net pktlagvariance=200 and dedicated server checked

[zinc loom]

Heh... The more I hack on Shootergame the more I want to just start again from scratch using blueprints

[jolly siren]

Blueprints wouldn't help this at all. It's an issue with the character movement component

[zinc loom]

Yeah I know. I also wish all of the smoothing was done at a higher level instead of in CMC so it could be used by regular pawns :/

[twin juniper]

@jolly siren damn good finds. So you'd have to implement your own smoothing logic based on the CMC then?

[jolly siren]

That's what it looks like

Although I just tested with listen server and I'm still getting the movement jumps

so debugging that

[hazy haven]

@gleaming bobcat ahh yeah the savedmove flags are only good for an event like jump prone crouch walljump etc, I did try and do dynamic move altering with CmC a way back but never ended up with satisfactory results, my skills were lacking

[twin juniper]

You are getting these freqent pops even in real life scenarios (i.e. on a dedicated sever playtesting)? @jolly siren

[jolly siren]

yes

[twin juniper]

I would assume many games don't touch the CMC but have smooth movement 99% of the time

[jolly siren]

They aren't super frequent. Probably 10-20 per match but I have really good internet. Other testers get it a lot more frequent than that on midgrade net.

But even 10-20 is really jarring

I would definitely not consider it good enough as-is

[zinc loom]

Just went thru my bookmarks, found this from when I was digging at doing something outside of CMC

https://www.gamedev.net/blogs/entry/2260592-how-i-synchronized-a-simple-rigidbody-across-network-players-with-ue4/

[jolly siren]

That is for physics tho

I'm just talking about CMC

[twin juniper]

@jolly siren and you are debugging with the show net corrections visualiser to make sure it's only happening at those times? (I know it may seem stupid but I had an issue where my client and server had slightly different speeds and they were constantly a bit out of sync leading to more corrections than necessary)

Also checking to see if it's happening at specific times like when colliding or doing a certain action

[jolly siren]

Yeah the movement speed is the same between server and client. It only happens when I get a ping spike. I can see my ping and have watched it spike when I get the jerky teleporting. Also like I said it's easily reproducible with shootergame when setting a high lag variance

And no I'm not colliding with anything

just walking on a straight flag plane

CMC just doesn't handle lag spikes

[twin juniper]

If the ping is moving +200 ms then it's probably unavoidable to some degree

IF it can't get new info for 200ms there will be a gap

[jolly siren]

That is realistic tho

ping spikes in real life

[twin juniper]

I guess I don't encounter them very often as the ping usually stays pretty consistent for me

maybe +- 30ms max

[jolly siren]

so when you run something like this for say 100 packets you don't get ping spikes?

https://ping.canbeuseful.com/en#FAQ

[twin juniper]

Well testing playing shootergame or whatever over the network I notice no corrections

I'll test this out

[jolly siren]

Over the internet or lan? With dedicated server?

[twin juniper]

Dedicated server

[jolly siren]

You would have to play for a bit to notice them. Idk how often you play or the length of time

[twin juniper]

Also something to consider is that if you do smoothly interpolate, depending on the distance it may be more jarring than a pop

If the player feels that they are sliding across the floor when they didn't want to move

Ok after 150 sends there was indeed a 200ms lagspike

[jolly siren]

Right, yeah that would be a jerky movement with CMC

[twin juniper]

The vast majority stayed low though, but I think if you have pktlagvariance set high, that constantly simulates lag spikes, wouldn't it?

like every second your ping could be anywhere between 0 -200

[jolly siren]

Right, that is what I was simulating

and it reproduces the issue I see in real life

exaggerated to happen all the time, but it reproduces it still

I have tested my game for 300+ hours. And also compared to shootergame and they both behave the same. And both use CMC

[twin juniper]

what pktlag variance value do you use?

I'll test in my game now

[jolly siren]

net pktlag=50 and net pktlagvariance=200 is what I was using

300 will give them even more frequently obviously. but 200 reproduces it fine.

[twin juniper]

Ok just tested with 100ms pktlag and 200ms variance and got no corrections walking or sprinting around

Corrections 100% of the time when jumping though

[jolly siren]

yeah I'm not talking about jumping. Just walking around. Do you have a super low movement speed or something?

[twin juniper]

450 walk, 750 sprint

[gleaming bobcat]

Ah you are talking about dynamic character movement speed ?

[jolly siren]

Should be fine for reproducing. Are you on listen or dedicated?

[twin juniper]

Not necessarily

Dedicated

PIE dedicated though

But that usually works fine

[jolly siren]

Yeah that's fine. That is how I'm reproducing in shootergame and my game.

[twin juniper]

I can also test in shootergame

[jolly siren]

what version are you on?

[twin juniper]

4.18.3

[jolly siren]

okay, same here

can you try 50ms and 200ms? It's a larger spike. But I'm opening shootergame to try 100 and 200 now

[twin juniper]

Ok will do

Tested again with 50ms on my project and nothing, opening SG now

Btw does this happen when you simply have your netpktlag = 250 or similar with no variance?

Or only when it is varying?

[jolly siren]

yeah I can still reproduce it easily with 100 lag and 200 variance in shootergame

[twin juniper]

And without variance but just constant lag?

[jolly siren]

no, it doesn't happen then

it's the variance that is causing it

the spikes in ping

Same in real life conditions

[twin juniper]

Ok tested in shootergame and nothing but one thing I noticed when debugging the ping is that it's not exactly moving much for me

With 200ms variance, I don't seem to be getting that range

[jolly siren]

how are you viewing the ping?

[twin juniper]

Well in my own project I have a lagcomp ping debugger that overrides the PS one but updates much more frequently

And in SG just printing exact ping * 4

I guess it does work it just stays around the 180 - 220 range

Anyway it still doesn't cause any problems for me

Only seeing corrections in SG when jumping

What is the netupdatefreq for your character?

[nova sky]

@jolly siren

port 27015 uses automatic

should i add GameServerQueryPort=7777 to DeafultEngine.ini?

[jolly siren]

@twin juniper it's default

[twin juniper]

Default is super low

It goes down to like 2

[jolly siren]

@nova sky what? no you should leave that the same. You need to port forward 27015 and 7777

[nova sky]

How can i do it?

[twin juniper]

I bumped the lag up loads in SG and still only noticed any corrections around stairs when sprinting, any other walking or flat surface movement ways fine

Try testing your project with max and min netupdatefreq to 100 and see if it changes anything

[nova sky]

Server just use 27015 if i don't add config

or 7777 if i will add it

[jolly siren]

You need to port forward both...that's it. No config changes

[nova sky]

Maybe i understand

if forward port mean to open it, i already have opened both ports

[jolly siren]

yeah, I tried upping min net update frequency to 100 and it's still the same

[twin juniper]

I'm very confused as to why we are getting different results on vanilla shootergame

just to double verify

You are entering these commands on start

Net PktLag= 50 
Net PktLagVariance= 200 

?

[jolly siren]

I am entering them via the console after I click play

[twin juniper]

Yeah me too

I also have p.NetShowCorrections 1

To see when it happens

Can you also debug the ping and verify you are getting around the 180 - 220 range average?

[jolly siren]

Are you focusing too much on that? I'm not rendering the corrections. It is super obvious just by watching the viewport

[twin juniper]

I'm not focusing on it but I don't feel any other smoothness interruptions

[jolly siren]

I'm downloading shootergame on my other computer now so I can record what I am doing

[twin juniper]

And it's so subtle when corrected that I have to double check that the correction happened

[jolly siren]

And yeah ping isn't printing correctly for me either

[twin juniper]

It's not obvious

[jolly siren]

It's very obvious here. I will record so you can see exactly what I'm doing.

[twin juniper]

Ok great

[jolly siren]

@nova sky yeah that looks fine

[nova sky]

i don't uderstand how i can fix it.

[jolly siren]

have you port forwarded them in your router tho?

or only opened in windows firewall?

[nova sky]

I can't forward them because i use hosting to host server

and i don't have router log and pass

i check ports

they are opened

• telnet are connecting to ports from my pc

[jolly siren]

okay, that is setup correctly then

[nova sky]

Can i find in net or forums ready clear dedicated server with steam api to download and check?

i found this giud

guid

https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux)#8._Dedicated_Server_on_Steam

and i didn't understand there can i find

CustomCreateSession.h

library

[twin juniper]

@jolly siren just ran around shootergame for 5 minutes both sprinting and walking and experienced 1 pop

[jolly siren]

That is a class they create there in the guide

[twin juniper]

Honestly though with lag variance that high for that long, that doesn't seem unordinary

[jolly siren]

Yeah you should be getting a lot more than that

[twin juniper]

Send on the video when you can and I'll check it out

[jolly siren]

okay opening shootergame on other computer now. sorry had to download

[twin juniper]

Np

[nova sky]

Why

here using ucustom.... class

Ok i will try to use this code

Is it child class of GameSession?

• there i should create SteamBridge class

[jolly siren]

It shows the child class right there

read the guide

[nova sky]

• int64bits

like class in vs

or in engine

?

[jolly siren]

I think you need to get some more basic unreal & c++ knowledge before trying this

john, give me a few minutes have to wait for shaders to compile

[twin juniper]

No worries I'm here all day

[gloomy tiger]

Hey guys! Question.

I'm creating a TopDown Multiplayer game, and my character replicates its movement. It works fine, but when I'm in the Standalone Game, the rotation is not smooth anymore. It stutter when changing the rotation. There's a perceptible... lag (?).

Do you have an idea of how I can fix this problem?

Thanks.

[nova sky]

Am i right that CreateCustomSessionDedicated is a child class which i should use?

Or it can be my old class with this name

yes

It's was my old class

I did a mistake

I created this class

And visual studio

can't find this includes

Mb i shouldn't create it

Is't because i forgot enable steam subsystem plugin in new project?

[jolly siren]

@twin juniper For some reason it does happen a lot less frequently on this computer than my other. But I reproduced it 3 times in a 2 minute video with lag variance of 200. See :49, 1:13, 2:08 in the video. And then I increase the variance to 300 at 2:15 and that causes it to happen much more frequently. https://youtu.be/xzZV3MYEaX4

2:15 and beyond is how it behaves at 200 variance on my other computer, which is why I was telling you to use that number

[twin juniper]

Says this video is unavailable

Still processing?

Nvm working now

[jolly siren]

forgot to hit publish

[twin juniper]

I see what you mean

Tested with 300ms here and get the same results

But still very infrequent

Could we perhaps throw shootergame onto a US dedicated server and see if this issue pops up when playing in a real network scenario as it does for you?

I definitely see what you mean but haven't personally had many of those kind of corrections in real tests other than the very occasional acceptable spikes that happen with any game from time to time

I'm just wondering if the 300ms variance command is just above what any regular player might experience or not

It's hard to tell with the faulty ping indicators

It feels like the server just didn't get input from the player for 300 ms so it finishes the current move and stops moving, then it gets the players current move when connection is regained and it snaps it back

[jolly siren]

Yeah they are infrequent in my real network testing. But they do happen like 10 times a match for me and more for my other tester that has more mid grade internet

[twin juniper]

I know Fortnite isn't a good example to compare due to the low tickrate and greatly higher bandwidth, but I notice pops like that at least 5-10 times per match there

And I can definitely recall COD and other games having similar pops now and then

May just be a side effect to ping spikes if you aren't extrapolating on the CMC

[jolly siren]

Ahh I have only played a little Fortnite and never played PUBG. I don't remember any pops like this on Halo

Right, yeah I feel like some smoothing would help it. Fortnite is pretty slow paced, so it's probably not that big of deal there.

[twin juniper]

When quickly building and rapidly moving it can be very annoying

You think you have ran around a corner but you pop back in view and get shot

[jolly siren]

That might be lag compensation with the shooting too tho. Favor the shooter stuff

[twin juniper]

I had just kind of accepted it as a side effect of online multiplayer. I'll definitely keep an eye out for it on my tests but when playing at reasonable pings, I've not had any noticeable drops other than very rare cases

For sure, but the pop in movement is very jarring

AS you have to readjust and moving to get back into cover gets you killed a lot of thetime

[jolly siren]

Right, yeah that's what we are running into too. Cases where it is jarring. In my game there are places in the environment that can kill you and a lot of the time a movement spike will hit and you will end up getting killed by the environment because of it

[twin juniper]

That sucks, it really feels annoying as a player for something out of your control like that to happen

Really makes you just not want to continue playing if it happens frequently

[nova sky]

I tried to buils

build

Create custom dedicated session

and i have this error

error MSB3075: The command "C:\Users\crewd\Documents\UnrealEngine-release\Engine\Build\BatchFiles\Build.bat SteamServerEditor Win64 Development "C:\Users\crewd\Documents\Unreal Projects\SteamServer\SteamServer.uproject" -waitmutex" exited with code 5. Please verify that you have sufficient rights to run this command.
2>

What did i miss?

fixed

I have new error

fatal error C1083: Cannot open include file: 'OnlineSubsystemUtils.h':

What should i add?

[icy nacelle]

Hey! Could someone please briefly explain to me how I can program something like Pickpocketing in a multiplayer game? How can I get a variable of the targeted player?

[jolly siren]

I haven't noticed any movement jerks in Fortnite so far. It probably matches me up with a server that I have really good ping with tho.

[winged badger]

@nova sky you are probably didn't declare the online subsystem module in your build.cs file as a dependency

[twin juniper]

anyone seen bullshit like this?

It works fine on my main server, but im trying to setup a separate server

im not sure why it says "killed"

i didnt press Ctrl + C

lol

ooh nvm

it was just the kernel killing the process lmao

not enough memory

checked /var/logs

[graceful cave]

i have a pawn that generates overlap events and the controlling client will print when the overlap event is called

but after possessing another pawn and then repossessing the original, only the server will print when he overlaps

is there any fix for this?

can potentially break things

[ripe raptor]

Hey folks, has anyone here had issues with UMG widgets / UWidgetComponents persisting on clients after a servertravel?

It is driving me insane I don't know what to do with them

[thin stratus]

On what actor do you have them

[ripe raptor]

on my player pawn

Who gets destroyed and the game mode on my new map re-creates them

and I can see the old widgets still on the screen, even find them with GetAllWidgetsOfClass but I can't call RemoveFromParent() on them because they don't have a UMG parent

[winged badger]

the HUD is not owned by the pawn, but by the controller

if you're using the HUD

for them to persist tho, something must have a reference to them

[ripe raptor]

Nothing explicitly. THere have been several reports about it on UDN without proper solutions

Was hoping someone might've stumbled on it

[winged badger]

you could move them to the HUD and keep control over them that way

[ripe raptor]

I need them to be on my player characters in world space

[thin stratus]

Hm, weird that they survive

Is it a Seamless travel?

Are you keeping the pawn alive?

Tried destroying the component when the pawn calls destroy? (should already happen though)

Also tried to wait 30-60 seconds im case garbage collection didn't pick it yet?

@ripe raptor

[stable kindle]

guys is there an inbuilt way to have actor tags to replicate?

[ripe raptor]

@thin stratus - Just calling ServerTravel on the server, seamless is turned on. Pawn is being destroyed, I tried destroying the widgets before that, yes.

(Sorry for the late reply I've been messing with the code)

[gleaming bobcat]

Morning. What is the highest ping what you are supporting in your game ? In terms of whether the game is still nicely playable no choppy position corrections etc. Because I still care about latency 300+

[manic pine]

id say 200 max for fast paced shooters, maybe even 150... too many compromises you have to make in regards to lag compensation, so with players with higher ping the game gets worse for everyone

that stuff doesnt matter much for slower games and mmos though, accurate simulation there seems more coincidental than designed

so i guess you could go with 300-400

[burnt meteor]

wow i am back

no 300-400 is bad, 100-300 should be good

the best value would be 1ms lol

[gleaming bobcat]

ARPG. Tried D3 on Asia server with 300 latency. Amazingly smooth experience still. But for example in UE Root motion of semi fast movement on ping 200+ causes some position correction at the and of the animation. which looks horrible

[burnt meteor]

hey guys i am trying to make a kick system in my game but all my player controller id's are returning the value of 0.

here's a screenshot:

[thin stratus]

Controller ID is not for multiplayer

[thin stratus]

Or rather not online

[burnt meteor]

ok

[thin stratus]

It's the local player id

[burnt meteor]

then how should i debug?

ok

[thin stratus]

What do you want to debug there?

[burnt meteor]

i made an array in the GM and