multiplayer

[chrome bay]

yeah

[grizzled stirrup]

Thanks

[chrome bay]

Oh boy Network Dormancy

what a minefield

Turns out that you really don't want to be changing dormancy very often

Waking an object from dormancy sends all of it's properties - even ones with COND_Initial out to the now-not-dormant connections

And that's even if they haven't changed.

The More You Know

[eternal briar]

Hi! In my multiplayer project, sometimes a client disconnects from the server. BUT that client still has the map loaded and has local copies of other clients in the map. Nothing else is working other than the local client's actions (basically becomes a non networked experience). Any ideas why that happens? An suggestions?

[chrome bay]

Likely the server crashes, client doesn't realise until they timeout

[eternal briar]

But other clients are connected to the server and everything is working there

[chrome bay]

If that's not happening then another explanation is that the network is completely saturated but not timing out.

i.e, sending too much data

Do a netprofile test to find out

[eternal briar]

We profiled that and the max bandwidth used is 30k bytes

Is that too much?

[chrome bay]

30K is quite high in all honesty

the UE4 default is 10-15

[eternal briar]

Oh okay

[grizzled stirrup]

Isn't that default super outdated though?

Like a few CMCs easily eat up 10K

[chrome bay]

Well UT only uses 20

Yeah that's why CMC is so unpopular 😄

You say that anyway, we have 100 in our game - and that's got a 15K limit

But we're using replication graph

And Rep graph doesn't give a crap about the bandwidth limit it turns out

[eternal briar]

Our clients are all connected using Oculus Quest if that helps

[grizzled stirrup]

Ah nice yeah I'd love a more minimal CMC but will look into the replication graph

I have my bandwidth caps at about 50K

Just to stop the horrible stuff that happens when you hit the limit

But I'm around 10 - 20 K usually

I think it's almost preferable to let the user hit his bandwidth cap than let the engine artificially limit it

[chrome bay]

Rep graph pretty much ignores it entirely and does what it wants

You can still saturate it, but there's no throttling or anything

[grizzled stirrup]

Ah that's very nice

The saturation with the default caps just ruin any experience

Things just stop

[chrome bay]

And it uses separate paths for actor spawning

[grizzled stirrup]

Even though most connections should EASILY be able to handle more than 10 kb / s

[chrome bay]

The biggest optimization you can make is to drop the Net Update Frequency of pretty much anything

[grizzled stirrup]

I have it at minimum to 30 for actors that need onrep stuff to go through

I noticed any lower than that and it's a dice roll if it makes it through

[chrome bay]

Most of my actors are at 1, with the single exception of pawns just because of Rep Movement

[grizzled stirrup]

Wow..

Maybe I'm doing something wrong

[chrome bay]

I do a lot of calls to ForceNetUpdate() instead

[grizzled stirrup]

Usually notice it on fast firing weapons

Ahhh

So you update when you need

Nice

[chrome bay]

it's been a slog to get to this point though I'll admit

[grizzled stirrup]

That is like doing one single update that the NetUpdateRate would be doing 30 times a second right?

[chrome bay]

Yeah tbh the properties themselves change very little so it's more about reducing the need to compare properties at all

[eternal briar]

Thank you @grizzled stirrup and @chrome bay, I have just one more question. Is there a way to increase bandwidth cap?

[chrome bay]

yeah

In DefaultEngine.ini

Like so:

MaxNetTickRate=60
NetServerMaxTickRate=60
LanServerMaxTickRate=60
bClampListenServerTickRates=true
MaxClientRate=10000
MaxInternetClientRate=10000```

I strongly recommend fixing the server and listen server tick rates

Otherwise on listen servers you'll be spamming the connection at the clients framerate

And that eats up quite a lot

[grizzled stirrup]

Oh thank you so much I didn't know about the listen cap- is that NetServerMaxTickRate ?

[chrome bay]

Yeah that and bClampListenServerTickRates

[grizzled stirrup]

Huge tip thank you

[eternal briar]

Ah okay I am doing that! As all the clients are Oculus Quests, I set server tickrate to be 72

I will reduce that

Thank you very much!

[chrome bay]

I'm not familiar with the oculus I'm afraid but yeah keep it as low as you can get away with

Fortnite runs at 20, which is super low

But... 100 players so. whatyagonnado

[eternal briar]

wow

[grizzled stirrup]

I wouldn't have thought it was that low

Have a good experience whenever I play it

[chrome bay]

That's what i remember hearing

We're certainly at 20 though in HLL

[grizzled stirrup]

Pretty impressive also considering the amount of stuff going on, like how fast you can build stuff

You making a BR?

[chrome bay]

Nah, 100 players but WW2

And not BR

[grizzled stirrup]

Oh cool!

100 players sure is a feat to be proud of!

[eternal briar]

Yes! that's awesome!

Thank you again

[chrome bay]

(shameless plug) https://store.steampowered.com/app/686810/Hell_Let_Loose/

[grizzled stirrup]

Wow it looks to be really successful

Great work

[chrome bay]

But because of the kind of game it is it's not so much about being super responsive so we can get away with quite a lot

[dark edge]

@chrome bay how are you doing your bullets?

[chrome bay]

In HLL they are hitscan with bullet drop

with a handful using projectiles

can't say much more on it really because reasons.

but personally I am an advocate for projectiles

[dark edge]

You tried framewise hitscan?

Basically line trace projectiles?

I implemented it in my project and it works astoundingly well. Really well suited for a subsystem too for some good perf. A bullet is basically a struct with a location, velocity, lifetime, and other data. You fire a bullet by adding a bullet struct to an array, and each frame every bullet in the array is updated, updating velocity and tracing from loc to lock+vel. You tag the struct to indicate a hit and then process all hits at once. Super lightweight and can do gravity wind and drag really easily.

[chrome bay]

Yeah it's probably something we'll add later, just hasn't been the priority

[hexed merlin]

Big fan of HLL btw! Working at Team17 and have already peaked at the source for a bunch of stuff 😛

[chrome bay]

Have done that before on other projects

The downside of the projectiles, even as hitscans, is the extra networking overhead it would add for us

[hexed merlin]

bit ot but ive always wondered, is there bullet time in HLL? Could never tell haha

[chrome bay]

Hey you have the source you could see yourself 😄

[hexed merlin]

I wish i had the source at home lol

[chrome bay]

It's a contentious topic among that games community. Only two programmers however, so usually tied up elsewhere...

Some of the stuff I'd like to work on just has to take a backseat. Such is life

[hexed merlin]

Dont wanna work on HLL?

[chrome bay]

Oh nah I like working on it, just a lot I'd like to experiment with but it's not up to me 😄

[hexed merlin]

ah gotcha, personally i would just like to have some kind of focus, im doing a bit of everything right now

which is fun and all but ya know

[chrome bay]

Keep it fresh and get a side project 😄 This is mine

Also... since we're talking about network projectiles

https://www.youtube.com/watch?v=Y733GJnatpc

[hexed merlin]

Keewl

question that came up today at work: how much physics should be done on the server AND client? I argue it should be most of it for responsiveness but others disagree 🤔

[chrome bay]

All of it

[bitter oriole]

UE4 physics will run on both

No way around it

No way to sync them

[chrome bay]

That too

[bitter oriole]

Or as I usually put it, don't do MP physics in UE4

[hexed merlin]

well im thinking more like "should client pawn overlap with this thing or just the server"

like collision/overlaps for gameplay visuals for example

[bitter oriole]

For that kind of physics, you should do it on both and synchronize

Play effects on client, wait for the server to confirm

Rollback of necessary

[hexed merlin]

thats my argument too but my colleague thinks the case where the server fails to confirm is going to be a problem for the player, like "why did that sound play if I didnt pick that thing up" or whatever

but i feel thats rare enough that its not a problem, and is purely cosmetic anyway

[bitter oriole]

Well, yeah, but it's better than the sound coming in half a second later, every time

You can also have two sounds and make the lag part of gameplay - progress bar, etc

So you have time to get the answer and you know you won't fail

"long press" type actions work well for MP because you know by the end whether the server accepts it

[hexed merlin]

Makes sense. Jeez I never knew how much design goes into making multiplay doable

[chrome bay]

bMultiplayer = true;

ez

[hexed merlin]

good ol naive end-user

haha to be fair thats how UE4 live training tries to make it.

"Literally just set replicated on the actor"

[obtuse forum]

"It's just a checkbox"

[bitter oriole]

Multiplayer is very literally 3x more work on every feature

Sometimes 10x

Sometimes 100x

[hexed merlin]

Seems that way. I havent been on the project im working on since the beginning and it really shows how little they considered future features when doing the architecture

[worthy perch]

Might be easier if you just do local multiplayer now that Steam's Remote Play is here.

[bitter oriole]

Easier, but much worse

[hexed merlin]

True

[bitter oriole]

There's no beating the instant feedback of actual MP games

[hexed merlin]

I havent used it yet to be fair but ive seen stadia

oof

[hoary lark]

i love remote play. for playing turn-based rpg's. everything else it is ass

[worthy perch]

Yeah, proper client-prediction is nice, but wow is that painful to develop.

[bitter oriole]

Yeah, but it's also what people expect really 😛

[hexed merlin]

"negative latency" 😎

[hoary lark]

i have faint memories when i was a kid trying out Doom 1 on dial-up for the first time and wondering why my character was so unresponsive

[hexed merlin]

machine learning will solve it for us

itll play the game for us

https://www.youtube.com/watch?v=Lu56xVlZ40M

This one is pretty amazing

[eternal briar]

Hi, this keeps repeating in my server log:
[2020.01.29-22.15.50:969][765]LogNet: NotifyAcceptingConnection accepted from: 192.168.200.174:47142
[2020.01.29-22.15.50:969][765]LogHandshake: SendRestartHandshakeRequest.
The client gets disconnected after that
Any idea why this would happen?

[hollow stirrup]

Did you override any of the login functions in the gamemode?

[eternal briar]

I have not

Wait I have, OnPostLogin

[hollow stirrup]

What did you change?

PostLogin shouldn't cause a problem though, because the server would have already accepted or rejected the player by then

[eternal briar]

I am just spawning a pawn and possessing it with the PlayerController coming from OnPostLogin

[hollow stirrup]

Will you post a full log? Not just that snippet. You can use https://hastebin.com/ so you don't flood chat

[eternal briar]

Sure give me 1 minute

https://hastebin.com/bujesaliso.md

It is not letting me add the whole log, So I have added the snippet related to the particular IP

here is the pastebin link of full log: https://pastebin.com/8Tyv58zj

[hollow stirrup]

alright let's see

your connection is timing out

which is why the server can't accept the handshake from the client

[eternal briar]

Ah okay! How do I not let the connection time out

[hollow stirrup]

where are you loading the map?

Also, you are using blueprints right?

[eternal briar]

Yes I am using blueprints

I am doing servertravel mapname in execute console command node

[hollow stirrup]

If so, I assume you have a OpenLevel node that the server uses to travel to the map. You need to make sure you have ?listen in your options

Ah, well regardless of how you are starting your server you need to have append ?listen to the options string

[eternal briar]

I am doing that

[hollow stirrup]

Otherwise your server isn't going to actually start and the client will be left trying to connect to nothing

Can I see where you are doing that

[eternal briar]

Sure!

[hollow stirrup]

also, were you doing this in PIE?

I didn't see a PIE session in your logs

[eternal briar]

No

Standalone game

[hollow stirrup]

Alright

[eternal briar]

This is where I create a server

And when all clients have joined, I travel to another map using this

I am using non-seamless travel

[hollow stirrup]

Alright, so servertravel will only work if it's called by the server

[eternal briar]

Yes it is called by the server

All clients do travel to the new map but then the timeouts happen

[tight wyvern]

question. Is anyone familiar with any attempts of creating an Engine Extension, Plugin, or custom engine build which allows for P2P support? I haven't managed to find anything after a cursory search on the internet, but if there ever was an attempt, perhaps somebody here would know.

[flint rose]

Hi everyone, I'm having issues with AddControllerPitchInput. If the character is a Client it doesn't appear to be taking effect, yet AddConotrollerYawInput appears to be working correctly.

If I run as the server, it works as expected.

[eternal briar]

@hollow stirrup thanks for all the help!

[flint rose]

If I manually change a value in the spring arm in the Details panel while playing, it seems to update.

[hollow stirrup]

@eternal briar Did you get it to work?

[eternal briar]

no, the timeouts still happen

[tight wyvern]

nevermind, I just found the EOS SDK, looks like it has what I need

[eternal briar]

Are there any settings/ini values I need to change to make sure timeouts never happen?

[hollow stirrup]

You can't make sure a timeout never happens

Even if you could, you wouldn't want to

timeouts are a good thing

If your client/server never timed out, then it would continue sending requests indefinitely until it was forcefully stopped. Which is not good

You need to figure out what is actually causing it, from what you've shown me I'm pretty sure it's from how you are actually loading the map

You said it works up until you run that servertravel command?

[eternal briar]

Yes, after the servertravel happens, the timeout counter starts

[hollow stirrup]

will you paste the full command

[eternal briar]

And as the default timeout value is 60 s, the clients disconnect after 60 s

you mean "servertravel mapname"?

[hollow stirrup]

do servertravel mapname?listen

[eternal briar]

OKay will try that

Need 10 minutes to build and test

[hollow stirrup]

in the meantime, I'd recommend reading this https://wiki.unrealengine.com/Passing_Arguments_To_Server_During_Connection

[eternal briar]

Okay will do thank you

The timeouts are still happening

exactly 60 seconds later the client times out

[hollow stirrup]

try testing it PIE

[eternal briar]

Can't test it in PIE, it is a VR experience

[flint rose]

Anyone have any idea on my character movement issue?

[eternal briar]

@flint rose This might help https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/40591-how-do-i-replicate-pitch-input-no-blendspace

[flint rose]

That's the odd part, I'm not trying to replicate it.

[eternal briar]

I don't know then, I am sorry

[hollow stirrup]

@eternal briar ah, I did not know that.

[flint rose]

Basically, I followed this: https://docs.unrealengine.com/en-US/Programming/Tutorials/FirstPersonShooter/2/4/index.html and am seeing the issue.

Character can't move unless they're the server

Just seems like such a trivial thing to get stuck on unfortunately, I'm sure it's some boolean I'm missing or something.

[hollow stirrup]

welcome to game dev

you get caught up on tiny shit

[flint rose]

Oddly enough, if I convert the code to BP. It works.

Although they're calling the same thing.

I guess I'll try CPP channel.

[hollow stirrup]

@flint rose can you post your code

can't really tell you what's wrong if I can't see what you did

oh you moved channels, I'm slow today

[flint rose]

All good. lol.

[gleaming vector]

does anyone have any good resources on using Repication Graph?

maybe @chrome bay ?

[hollow stirrup]

https://www.youtube.com/watch?v=VusAHXoHF3Y

[ebon nimbus]

I posted yesterday about an issue I was having with getting the client characters to face the direction of the player start they spawned at. I recreated the issue in a starter project and took some screens in hope that one of you would know whats the issue

https://gyazo.com/8f9abcd1fd2cae396d08f00b6016b487

https://gyazo.com/8ea733c97df05b6968b35a841be2e04c

https://gyazo.com/af1f1375f1442cdcdb3aa2c9d01151c4

https://gyazo.com/219fd36a4afb5e12e49f56ff91e4769c

this one is from inside my gamemode

https://gyazo.com/67744f3c29eb26007e262552bc0cd069

It definitely turns after being possessed.

[teal python]

I'm starting work on my first c++ multiplayer project and have had no luck finding any good examples of how a custom PlayerController subclass should be written to integrate with the player pawns. Seems everyone just adds the input layer within the player Pawn/Character subclass.

Does anyone have any good examples of how Player Controller subclasses should be written when building a multiplayer game?

[fossil spoke]

Depends on your games needs.

If you have multiple unique characters/pawns that have also unique inputs, then implementing the unique inputs on the Pawn would make sense.

Placing shared Inputs on the PlayerController isnt a bad idea.

If you had an FPS game for example, you could probably get away with having Inputs on the Player Controller only.

Assuming the FPS game (as i mentioned above) doesnt have many unique Pawns.

[teal python]

Mostly I'm experimenting and learning. I would just like to use the Player Controller for encapsulation if nothing else.

[fossil spoke]

Then go ahead.

Nothing stopping you.

[flint rose]

I'm still not able to get my character movement working (initial chat way up there). Runs fine with no dedicated server, with, I can't move or look around

[flint rose]

For some reason. Changing the Game State class fixes it.

I don't know why, but it does.

It looks like because it's stuck on the EnteringMap state.

Not sure how to get it unstuck

[chrome bay]

@gleaming vector No resources I'm afraid, ShooterGame has an implementation of it which is quite a good source to start looking at

[gleaming vector]

Alright

I saw your Twitter thread and thought you might be a good person to ask

You mind if i ping you with questions? Seems like the library of knowledge on the subject is pretty thin

Maybe like with gameplay abilities, if we start talking about it a lot more people will get involved

[chrome bay]

yeah sure thing!

[eternal briar]

Hi all, in my networked game, a client is able to connect to the server, but unable to perform handshake. i.e. this shows up in the log. Can anyone please tell me why that happens?
LogNet: NotifyAcceptingConnection accepted from: 192.168.200.38:53596 [2020.01.29-22.54.59:163][572]LogHandshake: SendConnectChallenge. Timestamp: 22.699997, Cookie: 142050052191010086085145203040151151146197172107157133209114 [2020.01.29-22.54.59:163][572]LogNet: NotifyAcceptingConnection accepted from: 192.168.200.38:53596 [2020.01.29-22.54.59:163][572]LogHandshake: SendRestartHandshakeRequest. [2020.01.29-22.54.59:196][573]LogNet: NotifyAcceptingConnection accepted from: 192.168.200.38:53596 [2020.01.29-22.54.59:196][573]LogHandshake: SendChallengeAck. InCookie: 142223093172181219099251158133049123187204161119165025018043 [2020.01.29-22.54.59:196][573]LogNet: Finding connection to update to new address: 192.168.200.38:53596 [2020.01.29-22.54.59:196][573]LogNet: Failed to find an existing connection with a matching cookie. Restarted Handshake failed. [2020.01.29-22.54.59:196][573]LogNet: NotifyAcceptingConnection accepted from: 192.168.200.38:53596 [2020.01.29-22.54.59:196][573]LogHandshake: SendRestartHandshakeRequest.

Then after 60 seconds the client disconnects and in the log, it shows up as a timeout

How do I make sure the client is able to perform handshake properly?

[vague veldt]

Hi all,

I'm LAN mode.
I disable all firewall.

I try to find my session :
✅ node "Find Session" Work between 2 android devices
✅ node "Find Session" Work on windows with multiple instance on the same computer
⛔ node "Find Session" Don't work between 2 computers --> always return 0 session but Direct IP working (open IP), why?

any idea ?

is there a bug with "find session" node on windows device?

[spiral estuary]

Both on the same network?

[vague veldt]

@spiral estuary Yes same network, connection work with "open 192.168.1.20" but the "find session" node make empty array session

this happen only with pc (try different pc), work between android devices
i disable the windows firewall and disable my antivirus

[obtuse forum]

are you hosting on android and trying to connect on PC ?

[vague veldt]

@obtuse forum
i try all and want all work :
android(server) - android(client) --> OK with openIP, OK with find session
pc(server) - same pc (client) --> OK with openIP, OK with find session

android(server) - pc(client) --> OK with openIP, FIND SESSION success but return 0 session
pc(server) - android(client) --> OK with openIP, FIND SESSION success but return 0 session
pc(server) - pc(client) --> OK with openIP, FIND SESSION success but return 0 session

exactly same problem here : https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/57563-direct-ip-working-but-find-session-not

[obtuse forum]

hmm, im learning Mobile and Multiplayer still.
For me:
PC(server) -android(Client) --> find Session and join works
Android(server) -PC(Client) --> find Session and join DOSNT work

pc(server) - same pc (client) --> find session and join works

[vague veldt]

ue4 version ?

me 4.24

[obtuse forum]

4.24

[vague veldt]

strange

[obtuse forum]

advanced sessions plugin?

[vague veldt]

yes i try with and without

in previous version, i was able to find session in all state

[obtuse forum]

i havnt tried in lower version

[vague veldt]

i'm surprise you are able to find session with PC(server) - android (client) and not me 😦

i disable all firewall

and success with openIP command

[obtuse forum]

i havnt played with openIP

have you ran PC version in Standalone ?

[vague veldt]

yes i package for tests

can you share your package project to investigate if come from my network

or i can share mine too 🙂

[obtuse forum]

mine is kinda broken ATM, making a big change

[vague veldt]

can i share mine and you test in your network ?

[obtuse forum]

sure, ill have min back up soon

i changed a struct and broke a bunch of pin connections

[vague veldt]

ok i upload

[tall pine]

Hi guys,

So I'm trying to decide where I should put some of the MP logic of the game. Right now some of it in GameState, and I'm not sure if that is the right place for it.

For example, say in a racing game, if you race against AI, and they need to know if they pass certain checkpoint, they need to send out a call to say "I passed this check point". Where should that functionality go? Should that be in GameMode?

[vague veldt]

ok Ryck0Shae have test my build and all work perfectly on his pc and android, so error come from my pc or my network, have you any idea where i need to investigate ?

[grave tiger]

With my ongoing delights of lights. https://youtu.be/j1Tx4YgtGzk client side issue. Have it working server and can see it on the client but client not updating server side. Have multicast set. any suggests cheers

[twin juniper]

Can I spawn and replicate something from controller? It never replicates

[grizzled stirrup]

@grave tiger Are you doing a server RPC before doing the multicast?

Multicast on client doesn't run on server

[grave tiger]

How do I do a RPC call thought thats whaht the custom event was

[grizzled stirrup]

Yeah do a server custom event, then call the multicast

if doing it from the client

otherwise the multicast only runs on the client

[grave tiger]

thanks

[turbid tree]

Any idea how to enable the Networking Insights? My guess there is a flag needed for the engine/game to collect those stats...

tried standalone game in the editor and that did not help much

[honest scarab]

Has anyone set up game lift servers?

[bold mica]

@honest scarab Don't ask to ask, just ask whatever question you were going to ask, and if someone knows they'll answer

[hybrid zodiac]

Hi everyone, I have a problem with the Orientate Rotation to Movement setting in the character movement component. I want to implement character turning using A and D by using this feature and then having the character strafe left/right so they end up turning

However, on server and clients it causes the character to jitter weirdly

Once motion has stopped, the character will sort of vibrate and jitter left and right

Upon starting play it's fine, it's only once the character has started turning that they will then start spasming

I'm not trying to override rotation anywhere else as far as I can tell, and I have "use controller desired rotation" unchecked, and in the character blueprint I have unchecked the boxes to have the character use controller pitch, yaw and roll

[winged badger]

server shouldn't be correcting you if no movement is happening on server

[hybrid zodiac]

It looks like the jitter happens on all clients AND the server too. It also happens in standalone mode

So strange

Once the character has stopped turning, they just can't sit still

[winged badger]

if its standalone problem as well, it almost certainly has no relation to network

all RPCs would be interpreted as normal functions there

and no replication happens

if its a blueprint project, the OnReps would probably still fire, since that is not so much a replication as a setter callback in BP

its also indicated by the simulated proxies jittering - they normally do not do that, as they have no information that conflicts with the server (barring a non-synced collision here)

it is worth checking if your MovementMode in CMC is the one you'd expect

[hybrid zodiac]

Ok I'll take a look, thanks. It seems like the character is trying to get back to 0, but I've definitely checked and the "use controller desired rotation" is unchecked. It doesn't happen on my other character so something is definitely up

[twin juniper]

When I run dedicated server on 1+ players, only the server has the ability to move, when the server dies, then server has control over client 1 looking around and jumping only, no movement?

[bitter oriole]

What do you mean "the server has the ability to move" ?

[twin juniper]

I mean the pawn controlled by the server

[bitter oriole]

All pawns are controlled by the server

That's how servers work

Can you clarify ?

In particular, it sounds like you're talking about a hosting player, which doesn't make sense w/ dedicated

[twin juniper]

Oh true my bad, also realized wasn't running dedicated server, but then I can't move a single player anyway. im new, I think I will just redo the whole death/respawn code. But I mean when the player attemps to move. (non dedicated) Server moves server pawn, it moves no matter what. Other 2 clients attempt to move, half the time they don't have the ability to move in WSAD directions, but mouse input is taken, as is jumping. The other half the time, it is really laggy. But any time the server pawn dies, it takes over one of the 2 clients. Last bit happens with dedicated server

Player moves fine in standalone game

[bitter oriole]

Which kind of pawn are you using ? Character class ? Or Pawn class directly ?

[twin juniper]

character, it happens when i add stuff sometimes, the same issue comes up, clients can't move in any direction, but can jump and look around

[bitter oriole]

How do you feed input to the character ?

[twin juniper]

input func from project settings, I honestly dunno what is wrong. I made new project, redid the character, basic files, everything else is the same. When I have 3 or more players, the movement stops working

[bitter oriole]

So what does your input func does

[wise zephyr]

can someone help me

I am using websockets

i can send messages to my server

but i dont know how to show recieved messages

[tame copper]

hi guys

can u help me pls

im unable to turn on GI

[bitter oriole]

Not a multiplayer discussion, stay on #ue4-general

Don't multipost the same questions

[tame copper]

arhg

where can i get help then ?

[bitter oriole]

#ue4-general

You are getting help right now

[tame copper]

ok

[wise zephyr]

stranger do u know how to handle a simple websocket request

@bitter oriole

[bitter oriole]

Never used websockets in my life

[wise zephyr]

damnit

[bitter oriole]

Find some tutorials

[wise zephyr]

there is literally nothing on this function

i googled the shit out of it

[wise zephyr]

how do i call a delegate method that ue4 made
class FWebSocketMessageEvent : public TBaseMulticastDelegate_OneParam< void, const FString & >
i need to call this delegate method
https://docs.unrealengine.com/en-US/API/Runtime/WebSockets/IWebSocket/FWebSocketMessageEvent/index.html
FWebSocketMessageEvent
Delegate called when a web socket text message has been received.

@bitter oriole do u know how to use a delegate function in c++ that ue4 made?

[bitter oriole]

Don't tag me please, I'm not your personal support here.

[jolly siren]

@wise zephyr Don't post the same question in multiple channels. And don't tag people like that.

[meager spade]

@wise zephyr its just a delegate, you don't "call it", it is fired when the message comes in

#cpp i will continue, its not relevant here

[rose egret]

@wise zephyr u have to bind it.

[hot robin]

is there somewhere a more detailed documentation of UE4´s Networking?

[chrome bay]

What details are you looking for

[hot robin]

Dedicated servers as detailed as possible

i cant realy wrap my brain around it yet

if u fire up a dedicated server of your project as console... what happens if i want the dedicated server to have multiple "instances"

[chrome bay]

There's Cedrics compendium, which is a pretty common go-to for getting a good overall view of how networking in UE4 works at the gameplay level.

There are example multiplayer projects from Epic that are built to demonstrate multiplayer, like the "Multiplayer Shootout" for a basic one and "Shooter Game" for something more complex.

You don't

Instance means another .exe running

[hot robin]

see

[chrome bay]

Typically you have one machine which runs the EXE multiple times, and assigns those to different ports

Those machines are often beefy boxes that sit in a data center somewhere usually

Which either you or your players pay for (or both)

[hot robin]

yeah i rented one before thats not the issiue ^^

[chrome bay]

As far as spooling up individual instances it all depends on who is hosting them, what backend is being used etc.

It's always quite specific

[hot robin]

yeah im not sure about the solution yet but something like if "Instance 1" is full -> Create another and make players join this one over and over again and i want to make so if u go from Level A to Level B u go onto another server

[chrome bay]

Well if you want to have a system that moves players between servers that's something you have to build yourself

Matchmaking is a huge topic, it's not really the sort of thing you find tutorials for you just kinda "find your way" I guess

In our game we just have a server browser. People search for games and join / leave servers as they choose

[hot robin]

i mean its not "realy" matchmaking only "kinda"

[chrome bay]

And when matches end the server picks a new map and server-travels to it, no different to any other game really.

[hot robin]

have u player wow?

[chrome bay]

No

[hot robin]

🤔

[chrome bay]

But UE's server architecture isn't really built around games like that.

[hot robin]

u can go on a ship and if it crosses the sea you in another level and by that also "sometimes" on a nother "realm shard" / "Server"

[chrome bay]

That's something you would have to build yourself

[hot robin]

its not mmo just the basiic idea of it

[chrome bay]

You could do a masters thesis on how to build a system like that

It's not something the engine natively has built-in systems for.

[hot robin]

yeah its quiet complex^^ but that makes it as much fun as it will be frustating 😂

[chrome bay]

I wouldn't expect any tutorials put it that way 🙂

[hot robin]

yeahh no problem ^^

i first plan out abit more and look into the api arent there extensions like Advanced Session?

[hoary lark]

ah yes, mmo's. the Sirens of game dev.

[wise zephyr]

Hey bitches i finally got communication between my websocket server and ue4 they can send and recieve messages woooot woooot

[wraith smelt]

nice! and congrats! this stuff IS a real biatch

[limber gyro]

guys does any 1 know how to set healthbars in multiplayer?

like floating healthbars above the players head

whats the best way to acess the HP of the player in front of you?

HP variable is replicating fine, the issue is everytime i hit the enemy player my own bar ends up going down

so i am assuming that every bar in the game is showing my HP instead of the networked players

[limber gyro]

no 1?

[hot robin]

from the last 2 things u sayed u could come to the awnser 🙂

u replicate your health across everyone

[limber gyro]

i managed to fix it but its not an optimal solution

HP is replicated properly i am 100% sure of it

the issue is that in UMG you cant get the player that actualy has the widget attached to it

it always returns the local player no matter what node i use

so i had to make a character ref variable inside the umg and set it inside the player itself and now its getting the correct player it should display the HP for

but it not the best way, idealy this should be done insdie the umg binding alone to avoid complexity

honestly i think it might be a bug or a weird design decision, "Get owning player pawn" should return whatever a widgetcomponent is attached to and it is not at the moment

[peak star]

@limber gyro be aware that on each machine, playercontroller only exists for that machine. Exception is the server who has all playercontrollers.

If you try to have clients communicate to other clients' playercontrollers, it will not work. Have to ask server to communicate for you

So for healthbars do not store and replicate variable in playercontroller. Do it in playerstate instead, because all machines get updates on all other machines' playerstates (unlike playercontrollers)

Then have your healthbar widgets access the playerstate to find out how much health to display

So then the trick is how does it know which playerstate to access? Easy if you can get it from the pawn. I dont remember if you can.

[limber gyro]

i wasnt using the controller, i ver yrarely use it actualy, only the pawn(character)

[turbid tree]

Hi, I asked yesterday, going to ask again... How do I enable network profiling in insights, does the engine/game/dedicated server need to start with a speciffic switch? I am not getting any data

[molten pasture]

I run editor with -server -log networkprofiler=true

and that gives me a dedicated server with visible log window and profiling

@turbid tree

[turbid tree]

That would not be Insights right?:)

[deft ocean]

If I want money variable to be private information, but persist between deaths, it should go into player controller? Or is there better place to put it for owner/client access only?

[turbid tree]

Controller sounds fine, player state might also work...

[deft ocean]

ya i have bunch of stuff in player state, but its public info

[ember gale]

So I'm trying to learn multiplayer stuff. trying to build a simple little game and I'm following along the network compendium. I ran into an issue with the virtual bool ReadyToStartMatch_Implementation() override; function. if it calls the Super::ReadyToStartMatch() it crashes immediately. seems like a violation occurs or something. if I don't call that super, no crash.

[cedar finch]

I'm trying to replicate a "decal component" but for some reason it only changes on host. Are you able to change a decal component and everyone see it change in game? https://i.gyazo.com/d98fc9c6b58bff3ff5db89f40135b9dc.png

It's done inside Event Begin Play. I've tried every way I can think of the make it work for clients

[cedar finch]

I'm getting a random number and then setting the the decal material based on that number.

[hollow stirrup]

@twin juniper hey so, there are is some stuff built into UE4 that will help you with what you are trying to do. First off, you are going to want to be familiar with the FJsonObject, FJsonValue and IHttpRequest classes. Those will allow you to handle POSTing data to your webserver and making json requests which you will need to do for a auth server.

If you are making a system that needs to handle user verification and then return something like a character list you are 100% going to need to be familiar with these classes plus the rest of the JSON library in the engine. As for the server side of things, PHP is really easy to get up and running. You can easily setup a AWS EC2 instance to work with a AWS RDS database, that can be done in a day. That is what I am currently using for my project, if you need more help setting that up you can ask me about that directly.

But if you don't want to use PHP, you could use asp.net which is a C# library for creating web api's. I'm using it right now because I am also working with Spatial OS so I have to in order to use their Platform SDK, and I really like it so far. It has a lot of great features, their Blazor framework is spot on.

If you are not working with Spatial OS or don't plan on it, PHP would be my recommendation. PDO is nice because of how many database engines it supports. Although I am a little bias towards PHP because of my background.

The FJsonObjectConverter class has everything you need to convert JSON to objects and vice versa

[gusty slate]

Hello,
Just a simple thing, let's say I want to get the current client's player controller. How does one do that? without getting to the character.
For example, how do I get the player index? if I want to use GetPlayerController

[thin stratus]

PlayerIndex is a LocalPlayer thing. In a network environment you aren't using that (at least usually).

GetPlayerController is relative to who calls it. If you are on Client 1 and you use it, you get Client 1s.
If you are on the Server, you'll get the Server's.

It's advised to retrieve the Controller relative to the Actor you are on, e.g. GetController on the Pawn/Character or GetOwner on the PlayerState.

But keep in mind the PlayerController is only valid on Server and OwningClient

[lean flint]

im trying to learn how to assign PlayerStart points when players join a server. ive seen this following method on forums and youtube and it seems to work except for one part. if a player disconnects and then reconnects, the PlayerStart variable that i'm setting in their PlayerState doesn't get reassigned. it gets set on the initial connection though. any ideas what i'm doing wrong here?

[karmic briar]

hey guys can u guys help me how to fix this im trying to attach the character to horse but it got rebound https://gyazo.com/e4f45f315b9ba74b0c84bdb9cb5b3e80

here the code https://gyazo.com/3c4e4d2e499d3132cb727c7551488c29

[grizzled stirrup]

If you only need basic client authoritative movement and some simple AI movement, would it make sense to write your own very stripped down version of the character movement component, only replicating a basic location, rotation and velocity?

Judging by some tests, CMC is doing all kinds of stuff on tick including sending RPCs like crazy

[karmic briar]

im not good with c++

[grizzled stirrup]

Sorry I was asking a different question

Not related to your one

[karmic briar]

ouh

[vivid seal]

@grizzled stirrup let me know if you do, I’ve been wanting to dump the CMC for a while, it’s hard to work with for anything complicated

[grizzled stirrup]

Will do. I think the hardest part to get right is making sure the state continues as you'd expect on clients (landing events trigger when they happen on the clients screen)

But other than that there's a lot of bloat that I don't think I'd need in this case

@chrome bay you mentioned you don't use CMC for your 100 player game, did you write a custom lightweight movement component for your needs?

[chrome bay]

Nah we do use CMC

[grizzled stirrup]

Ah ok

I guess it's a difficult beast to replace

Even for a simple usecase

[dark edge]

Is there an easy generalized approach to predicted shooting?

[ancient moth]

Hello everyone ! I need some advises for my game. I'm currently on a Code Lyoko game, multiplayer, but I don't know exactly what is the limits of UE4. I would need an global AI acting on 5 maps to manage monsters strategy and objectives. Players can be on 2+ maps at the same time. Questions :

• Can i do this with one permanent map with the 5 area in level streaming ? Can I load only one sublevel for only one player ?
• If not, can I use an AI EQS on different levels at the same time ?

[trim flare]

Hello, I ended up here because I'm trying to mod a game but my hands are severely tied by 1) the unofficial SDK we have been given, and 2) my own knowledge of several kinda complex topics.
Basically, we don't have a C++ integrated project, we have placeholder classes where we know some of the functions and variables in use but can only subclass them in BPs as we can't actually change any of the game's C++.
But by subclassing and subleveling existing key classes we thought we were getting somewhere...
So my restrictions rn are basically that anything I want to do has to be 1)entirely through blueprints (I think) and 2) I want to have it execute things on my dedicated server, through my custom level which I make, based on what the client is doing.

in case you were wondering why I want to do this: the devs are a very small team and entirely dropping the ball on supporting our favorite gamemode as well as making the lives of community server hosters easier.

The problem I'm trying to solve rn is:
If admins on my server use certain commands that I want to be able to track and audit, like kicking or banning a player, I want the server to store that in a centralized place. this currently doesn't get logged, it doesn't go anywhere. It's just been wired to store SteamID and remaining ban time in the Game.ini on the server, which is not nearly sufficient - the reason for banning is lost as well as who did it.

Unfortunately I can't replace those commands, but through inserting custom event commands into the level I could make something that logs what they entered into that command, and then executes the arguments as a console command.

I can get that done in a level that sublevels our own custom levels or other existing levels. The problem I'm facing is persisting that information serverside. I can create savegames clientside to store it, or I can use their function to save it to the client's Game.ini file, but I want it to be collected and saved serverside!

So basically, I want any call of the custom event in my level BP to be replicated serverside, and the String var I store the rolling ban command log appender in should be appended to the existing log serverside and stored. I have this working clientside, my problem is getting the server to accept my changed vars and execute the command that was triggered.

reading up on UE networking, I read that the only method calls that are replicated serverside are of the PlayerController class. Is this true? I tried to make my CE dispatch the event from my Level bp to a subclass of PlayerController and trigger the save from there... no dice or I did something wrong.
Does this approach even make sense?
(I made a subclass of the existing GameMode and PlayerController and set them as my world settings of my custom Level)
basically I'm trying to offer custom console commands that do what I want and allow me to do stuff serverside on my own dedicated server without being able to change the CPP or the original game's GameMode orPlayerController classes..
If someone could help me wrap my head around what I'm doing (am java dev, visual programming hurts, this isn't the kind of networking I know) I would be most grateful!

[thin stratus]

Well the LevelBlueprint isn't replicated afaik

And even if it is, it isn't owned by any client I assume, so ServerRPC won't work there.

You are required to call ServerRPC through a client owned actor, such as PlayerController, PlayerState or PlayerCharacter

@trim flare

[trim flare]

ok so that part I got correct?

or well, I read correctly that the client's actions in the level BP can't be replicated. but I could make it fire an event dispatcher that's being listened for in the PlayerController subclass and get that replicated to server?

I'm new to UE and one of the things that bothers me is so much stuff is hidden on the UI that's essential to get things done... only just discovered where the option to set variables to replicate is hidden :/

that aside, what I read here suggested that it was possible to have my stuff replicated serverside through using PlayerController, but then I think PlayerController may not have the authority to create a savegame serverside? that wasn't something they were trying to do... https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/30639-problem-with-client-server-custom-event

[ivory lintel]

Guys...we can't replicate a array variable(of a custom structure) from server to clients???

[rancid barn]

You can

There could me a ton of things preventing it from working, but what comes to mind is making sure everything is UPROPERTY and that it is a properly set up USTRUCT

[ivory lintel]

i tryiing to create a array of custom struct in my actor component

and a every tick...the server flipflop a especific value to true and false

and client try to print on scren

screen*

using BP

[trim flare]

@rancid barn could you tell me something more about that? if I just add an extra var to a child BP of a playercontroller can I get it replicated?

[ivory lintel]

in tick event to test

[azure grove]

If you're setting up a listenserver that other clients can connect to, would they all work the same as on steam?

[ivory lintel]

I notice that are irregular replication...the server changes value a each frame and the client take irregular time to get the new value

[azure grove]

I'm not sure if I should be watching tutorials on steam specific multiplayer or just multiplayer in general

[ivory lintel]

objects can be replicated in ue4???

or just actors?

I can construct a object in BP and replicate him?

[copper grove]

if an object is placeable

int he world

and has a transform

its an actor

[ivory lintel]

and select a object class...not a actor class

[copper grove]

what kind of object?

[winged badger]

you need c++ for replicating UObjects

it can't be done from BP

[ivory lintel]

understand

[winged badger]

(they can be constructed in BP, but they need to be referenced from c++ and ReplicateSubobjects can't be overriden from BP)

[ivory lintel]

dammit

[winged badger]

BP networking is pretty limited

[ivory lintel]

will try with c++

have an example of code?

[winged badger]

bool UAttributeComponent::ReplicateSubobjects(class UActorChannel *Channel, class FOutBunch *Bunch, FReplicationFlags *RepFlags)
{
    bool WroteSomething = Super::ReplicateSubobjects(Channel, Bunch, RepFlags);

    for (USolsticeBuffBase* Buff : ReplicatedBuffs)
    {
        if (IsValid(Buff) && Buff->IsReplicated())
        {
            WroteSomething |= Channel->ReplicateSubobject(Buff, *Bunch, *RepFlags);
        }
    }
    return WroteSomething;
}

void UAttributeComponent::PreReplication(IRepChangedPropertyTracker & ChangedPropertyTracker)
{
    Super::PreReplication(ChangedPropertyTracker);

    for (USolsticeBuffBase* Buff : ReplicatedBuffs)
    {
        if (IsValid(Buff) && IsValid(GetOwner()))
        {
            Buff->PreReplication(ChangedPropertyTracker);
        }
    }
}

bool USolsticeBuffBase::IsSupportedForNetworking() const
{
    return IsReplicated() || Super::IsSupportedForNetworking();
}

there are 2 more functions to override if you want to send RPCs through

bool USolsticeBuffBase::CallRemoteFunction(UFunction* Function, void* Parameters, struct FOutParmRec* OutParms, FFrame* Stack)
{
    AActor* MyOwner = GetActorOwner();
    if (MyOwner)
    {
        UNetDriver* NetDriver = MyOwner->GetNetDriver();
        if (NetDriver)
        {
            NetDriver->ProcessRemoteFunction(MyOwner, Function, Parameters, OutParms, Stack, this);
            return true;
        }
    }
    return false;
}

int32 USolsticeBuffBase::GetFunctionCallspace(UFunction* Function, void* Parameters, FFrame* Stack)
{
    AActor* MyOwner = GetActorOwner();
    return MyOwner ? MyOwner->GetFunctionCallspace(Function, Parameters, Stack) : FunctionCallspace::Local;
}
void USolsticeBuffBase::PreReplication(IRepChangedPropertyTracker & ChangedPropertyTracker)
{
    UBlueprintGeneratedClass* BPClass = Cast<UBlueprintGeneratedClass>(GetClass());
    if (BPClass != NULL)
    {
        BPClass->InstancePreReplication(this, ChangedPropertyTracker);
    }
}

note this code is ActorComponent replicating Subobjects

not the Actor

its largely similar, and doing it via Actor is not subject to one of Unreal's landmines

[ivory lintel]

a wanna to create a single object that will be construct inside a actor component in BP

this objects will be my ability class

[winged badger]

buff here is a replicated UObject, IsReplicated just returns a boolean defined inside the class

AttributeComponent is an ActorComponent replicating it

landmine i mentioned is when Unreal replicates a UObject with something other then Actor as the Outer, it will swap the Outer on clients to the Actor whose channel has been used for replication

[ivory lintel]

i'm trying to avoid c++ at this moment... because have low experience with source code

[winged badger]

in my opinion, avoiding c++ and doing networking in BP is just not worth it

[ivory lintel]

this system it's for dummies like me only with bp...i will try to sell in marketplace at future

[winged badger]

to make a useful plugin for marketplace in BP, you really need c++ as well

[ivory lintel]

I'm not making a plugin...it's just a project

I getting a good results with objects class but, need to replicate information with multicast from server all time

if change a simple value inside object like a bool...need to change this with multicast

[winged badger]

multicast from server all the time is usually an indicator you're doing something wrong

[hollow stirrup]

There are ways to update a single variable on every client without using multicasts

Multicasts should be avoided unless you have to use one, or the use of one would not impact the performance of the game in anyway.

[winged badger]

multicasts are good only for non-stateful changes

[ivory lintel]

yea...

hate objects that are not replicated

what my option to create a object inside a actor component?
existe any other parent class that don't need to spawn in world to exist?

maybe this?

something like this

[winged badger]

that exists in the world, it is an actor

[ivory lintel]

existe any class that is replicate but don't have physical representation in the world???

[winged badger]

on their own, only actors can replicate

[ivory lintel]

i can create a actor without spawn this in the world?

[winged badger]

no

[ivory lintel]

I can have one actor component inside other actor component?

[winged badger]

you can't have an actor component on an actor component

[hexed merlin]

if you reeeeeally want to, you can

but you dont want to

[ivory lintel]

i need to create a replicated array of objets

[winged badger]

maybe you do, you haven't presented why

[ivory lintel]

I want to modifier a variable inside a object of array and this replicate to clients

[winged badger]

i gave you the code that works, has been tested and hasn't had problems for over a year

[ivory lintel]

yes...i will try to use this code later...need to understand because i want a simple object...not a component as you show

[winged badger]

that is replicating UObject

component just manages it

[ivory lintel]

i really appreciate you help but need to solve this problem with tools that I know

[winged badger]

solution to that conondrum is expand the array of tools you know

[ivory lintel]

if need to use c++...gameplay abilities framework is good...but don't domminate c++ at point to use

[ancient moth]

Hello everyone ! I need some advises for my game. I'm currently on a Code Lyoko game, multiplayer, but I don't know exactly what is the limits of UE4. I would need an global AI acting on 5 maps to manage monsters strategy and objectives. Players can be on 2+ maps at the same time. Questions :

• Can i do this with one permanent map with the 5 area in level streaming ? Can I load only one sublevel for only one player ?
• If not, can I use an AI EQS on different levels at the same time ?

[winged badger]

EQS and entire AI runs server side only

so it would have to have all levels loaded at the same time, or at least all levels relevant to any pf the players

[ancient moth]

The server can't be on 2 levels at the same time right ?

[cedar finch]

Can decal components be replicated in-game when you dynamically change their texture parameter? If so how?

[winged badger]

nothing can, but you can stream in sublevels

[cedar finch]

Wait. I got it! lol

[winged badger]

changing a texture of a decal sounds suspect to me

but it can be done by replicating the shader parameters

[cedar finch]

I just had a decal component in these actors I have on the walls. I wanted them to be random decals everytime you play the game. So I just set the texture parameter and color vector parameter. I finally got it replicating by getting the random INT on server and then setting the decal parameters in a multicast.
https://i.gyazo.com/dbe023af47178340fc8d3ed4e282db20.png

[winged badger]

and is there any point in keeping those synced?

[cedar finch]

So that all players see the correct decal image and color

It's only set once at the start of the game

[winged badger]

if it has no gameplay effect

there is no point replicating it

not like they'll contrast and compare

[cedar finch]

It's a puzzle though so people will need to know

They'll have to tell each other what symbols are what etc.

[winged badger]

then you replicate them as integers

or bytes

you just need a mapping from a byte to decal material/texture

that you kidna need anyway if its relevant to a puzzle

[cedar finch]

I forgot about that. lol I did it the long way using a switch on int 😐

[ancient moth]

Sorry to annoy you again @winged badger , if I have 2 sublevels A and B, I can load only A on player1, load only B on player2 and load A and B on server ?

[winged badger]

that should be doable yes

[ancient moth]

Excellent, thanks you 🙂

[winged badger]

i am sure unreal has few landmines waiting for you along the way

like the one where always loaded streaming levels can break after seamless travel

[ancient moth]

Coooool...!

[cedar finch]

@winged badger Thanks for the help. I did what you said and added them into a mapping and repnotify the int selected so everyone can see it. 🙂

[ancient moth]

I will see this when this fucking node "load stream level" will decide to work... 😅

[deft ocean]

How do you guys implement a 2 player vehicle where both players have distinct controls (pilot/gunner)? Is making my vehicle into two attached pawns the way to go or create separate interfaces for pilot/gunner? What is a good practice for possessing multi-player multiplayer vehicles?

[winged badger]

attaching a turret to the vehicle is the simplest way to do it

both pawns

[deft ocean]

thats what i was thinking, but i dunno it seemed kinda hacky haha

so my vehicle class could have sockets for spawning turret pawns

[winged badger]

routing the input is tricky otherwise

especially if your players can walk around as humans when not in vehicle

[deft ocean]

well imma try it out, thanks mate

[winged badger]

this lets you encapsulate input on the pawn

so your humanoid character, vehicle pilot and gunner can interpret same input action in vastly different ways

the turret itself doesn't have to be a Pawn physically

you can have a separate Pawn with no shape whatsoever that just forwards the input controls to whatever the turret is (actor, static/skeletal mesh)

you would still have to attach it to the vehicle to be able to query location and calculate net culling

[long gale]

I'm confused about dedicated server structure. Right now my suspicion (based on how setting things up in UE feels) is that .. say I have a game where many different maps load on the client - they need to be connected to the server controlling the correct map. Should I be spawning a separate exe for each map on the server? Does that also mean I should have an independent server for login/auth/etc that doesn't necessarily even get made in UE? Or is it meant to be a single executable for the server than can handle all of those aspects together

[winged badger]

one instance of the game = 1 map

[long gale]

ok cool, thanks 👍

[deft ocean]

@winged badger thanks thats exactly what i want. My vehicle is component based so I think I can use separate pawn with just those turret components.

[steady briar]

so on a similar note to that... i am trying to work on a stationary turret that the player can control. i figured id make the turret a pawn and possess it. not sure the best way to replicate the turrets aim though. ive been using the camera's view and lerping the turret to that rotation, so its not just point and click... but im not sure if theres any kind of replicated variable i could be using, because it only works on the owning client (so it never moves and always shoots in the default direction). any thoughts?

[azure grove]

Is it possible to create a decent multiplayer game where you can pick up objects and interact with open door events, etc. Using only blueprints?

I was watching a tutorial where the guy said if something doesn't replicate properly in BP over the network, the game will just crash for the clients/server.

I'm speaking about a Listen-Client type of multiplayer game btw.

[pallid mesa]

This concerns the core gameplay framework, get hooked to the conversation since this could "break/make work" lots of current systems https://github.com/EpicGames/UnrealEngine/pull/6576

[grizzled stirrup]

If you need to spawn lots of small value but unique pickups such as coins or ammo when killing an enemy, is the best way to go to spawn a barebones replicated actor with a net update frequency of 1 (as once it's spawned it doesn't change, the value and location is set)?

Say if it was possible for 500 or more of these actors to be active at once / in a short space of time

[chrome bay]

Hmm

Do each of the objects need to be picked up individually?

[grizzled stirrup]

At least visually yes (the magnetic effect you sometimes see in games with each stack of coins giving a new amount)

I could lump them together but even so if a group of 20 enemies all got blown up at once, they might all still drop 20 ammo and coins

Which is 40 unique actors

[chrome bay]

I guess having one actor, and an array that uses FFastArraySerializer might be quicker way to go, but only if the struct has the bare minimum of data

If you wanted to group them together that could work well.

[grizzled stirrup]

So the array would handle the sub stacks? and the actor would manage a bunch of coins at once?

[chrome bay]

Yeah

[grizzled stirrup]

Nice idea thanks I'll try that out

[chrome bay]

The key would be to keep the struct in FFastArraySerializer very small

I.e. just a location, count and ID or something

[grizzled stirrup]

Will probably raise the net update freq to about 10 then as the stacks would need to be updated for other players

Yeah would use FVector_NetQuantize for the loc, simple int32 (or even uint8 for the value) and then uint8 for ID

[chrome bay]

Honestly I'd keep it at one and just hit ForceNetUpdate() when someone picks something up

[grizzled stirrup]

Is there any downside to doing that? I feel like I could do that with a lot of my actors

No need to have them updating constantly

When they only need to update when something happens

[chrome bay]

So long as you aren't calling ForceNetUpdate() so often that suddenly every actor wants to send network updates each frame you should be fine 😄

I used it quite often though, no issues so far

[grizzled stirrup]

At the most I'd need to call it a few times a second

[chrome bay]

Just stops the server chugging over loads of actors which aren't doing anything

[grizzled stirrup]

Yeah that's a great idea

[chrome bay]

Just don't use Net Dormancy with it

As waking an actor from Dormancy sends all of it's properties again even if they haven't changed

And with an array that could quickly eat through the bandwidth

[grizzled stirrup]

I think I have most actors always relevant since my maps are quite small so it should be ok in this case, but good to know I'll make sure to look out for it

Did some fun research on barebones synced movement instead of the CMC yesterday, the bandwidth reduction is huge

I'm just missing simulating the CMC locally though

For the landing events

[chrome bay]

Just bear in mind that each time you update the FFastArraySerializerItem, the entire struct is sent - so even if the location doesn't change, that will be sent too

I.e. might be a case of premature optimization.. would have to test out using actors vs a combined actor to see which is really better

[grizzled stirrup]

Ok thank you, I've never used that type before so I'll have to research how it works

[hushed loom]

there is a possibility to implement voice chat even without Steam

[trim flare]

is there a way to have simple vars or other values attached to a child BP of an existing PlayerController object, become replicated to the server?
I'm restricted to using BPs because I'm modding an existing game but we have an unofficial SDK
What kind of vars or properties could I potentially (replicate? repnotify?) to the server?

[chrome bay]

Replication is always Server->Client never the other way around

If you want the Server to change something that all clients will see, the client has to send a Server RPC to change a replicated property.

[trim flare]

then how does a user submit input if the server doesn't accept it

I don't need it replicated to all clients, just the server's copy of my PlayerControllerChild, then I can work from there (hopefully)

[chrome bay]

If a client wants to send data to the server it has to be done via RPC

Whether it's for other clients etc. or no

[trim flare]

pretend I don't know c++ and I just told you I'm limited to using BPs

[chrome bay]

It's the same principle, you create a 'Run On Server' event in the BP

And call that to send data to the server

[trim flare]

and the only BP type the server accepts such changes from are PlayerControllers, if I read that correctly?

[chrome bay]

One key point though, is that the Client must be the "Owner" of the Blueprint calling that event. Otherwise the RPC will be rejected.

The Server will accept the RPC from anything the Client "Owns", which by default is the Player Controller, Player State and the Pawn they currently possess.

[trim flare]

ok, well here's what I'm trying to achieve atm

[chrome bay]

I'd suggest checking out the Network Compendium, it's a good starting point:
http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

[trim flare]

the game I'm trying to mod, we can run our own Level BPs on, I want to bake in a Custom Event used through the console, the only place I can get that to show up in game is if it's in the level bp

so that would have to dispatch the UserUsedTheCustomEvent to my PlayerControllerChild, along with the value that was passed

then the PlayerControllerChild would replicate that value (just a String) to the server

then based on receiving a changed value I want the server to log that value

which may require pumping it back to the level BP to get access to a savegame functionality or a save-to-config-ini command implemented by the devs

is this path even possible? let alone if specifically I could get this to work

thanks in advance anyway for your answer @chrome bay

I shall give that a read, but could you give me a heads up if I'm pursuing a path that's even worth pursuing? 🙂

[twin juniper]

Gmod has an addon that gives players prop protection so only they can move their own, I think it bases ownership on steamid, can I do this in unreal without steam, or would I need steam?

[thin stratus]

Depends, does that ownership need to persist in any way?

@twin juniper

[twin juniper]

if they leave the server

[thin stratus]

Then you need at least something with an account in the background

Cause you can't uniquely identify the player otherwise

[twin juniper]

well I guess I will just put it off then for later lol, I tried getting steam to work but failed miserably.

[thin stratus]

Alright

[twin juniper]

unless anyone happens to know any barebone tutorial for getting steam working. and players connecting/disconnecting

[thin stratus]

For just listen server it is already pretty barebone

Given you have your own steamappID to avoid any problems

DedicatedServers are more tricky. Never fully went through the process myself

[twin juniper]

well its gonna be dedicated hah... oh well

[long gale]

So I'm working with a group of people, and I'm setting up a dedicated server. I've grabbed UE source, built my server target. The problem, however, is that now it seems everyone else in the group needs the use UE source in order to work with the project. Can't connect from normal UE editor to the built server, and opening with source UE has changed the version it defaults to. This feels very suboptimal... is there a better approach here? I'd like to have normal UE work with the dedicated server build as well.

[thin stratus]

Well either you all use the same version, or if there are no engine changes, one of you builds both client and server

You shouldn't connect with the editor to a packaged server anyway

Bigger groups usually have a build server for that

[long gale]

"You shouldn't connect with the editor to a packaged server anyway" so the only way i'll ever be able to connect to a server from the editor is by launching in server mode using the editor?

that sounds rather painful considering if I want to quickly trial something with getting a number of people connected, and if that doesn't make sense to host on my dev machine... now i have to install the editor onto a remote machine to run it

[twin juniper]

how am I suppose to get this actor to be replicated to clients?

oh wait.

[limber gyro]

guys, i am having a server crash with a server log that doesnt say much, any tips on debugging issues like that?

[sly arch]

Is there a way to store players inventory over an sql server hosted at home?

[limber gyro]

yes there is, the same way you store it in a remote server i think

[sly arch]

With what software?

phpadmin? MySQL?

[limber gyro]

databases are not really my thing, but i assume sqlite world be the ideal for a small home database

but its up to you

just install whatever you feel more confortable with and make a connection

[twin juniper]

ignore my question, stupid me forget to tick replicates

[sly arch]

Well my plan is to get VM's and host it from there. It would be a multiplayer game so would sqlite be good enough?

[long gale]

I'd recommend postgresql over sqlite

[sly arch]

Will that save over a file on local computer or online?

[long gale]

It's a full databases. You can connect to it and make changes to data from any remote computer with access to it

Not through a single file though. That part is what sqlite is strong at is being portable

[sly arch]

Ah I gotcha

I'll look into it. Thanks

[long gale]

Sqlite lacks some generic features (there are ways to handle it) that I just don't prefer to lose personally. And for something like a game server I wouldn't think you'd need portability

[sly arch]

Right

[long gale]

Postgres can easily dump the data to transfer to another location

[sly arch]

https://www.unrealengine.com/marketplace/en-US/product/postgresql-integration

is this what you use?

[long gale]

I haven't used any databases yet with UE

My background is web servers

Moving to game Dev lately

[sly arch]

Oh neat.

Yeah i'm trying to figure out whats best while being broke lol

[long gale]

Looks like that plugin supports writing queries as strings so you can write any command you want to the server. If you do it with c++ though you won't need to buy a plugin

[sly arch]

Yeah, that's true.

Saves time though

[long gale]

Maybe

[twin juniper]

for 10$ could be a timer saver if you are new. good info though, I wasn't sure what SQL to use. 10$ for a noob like is a timer saver

[limber gyro]

Guys, my server is crashing when a player alt f4's any 1 has any idea on how to fix this?

[long gale]

The reason I say maybe is it depends on how versatile the blueprint nodes are. SQL data being worked with in object oriented manner can be problematic at times. The two don't always work together well

[sly arch]

Is it a dedicated server @limber gyro

[limber gyro]

yes

[sly arch]

Being hosted on the same pc as the player clicking alt f4?

[limber gyro]

no

[sly arch]

pc*

[limber gyro]

server is my pc

players are my friends in theyr respective houses

just testing stuff

[sly arch]

Oh. That's odd. lol Let me test on mine. I wonder if its an unreal bug

[limber gyro]

im doing some stuff on "logout" so it might be a crash from there

im just wondering if it could be some sort of option

[sly arch]

Is there an error code in the console? I messed up my database so I can't try it

[limber gyro]

theres an error in the log

[sly arch]

Which is?

[limber gyro]

acess violation

unknow function

diesbt say much

doesnt''

[sly arch]

https://answers.unrealengine.com/questions/184217/editor-crashes-when-running-a-dedicated-server-and.html

[limber gyro]

im not running it in the editor lol

its a server e xec

[sly arch]

Its in package settings

Which is the same if you build it with exe

Maybe not lol. I was looking at "local multiplayer"

[limber gyro]

Does any 1 know if "postlogin" is called again if a player recconects or if its only called once at the first sucessfull login?

Is there a way to debug a disconnect when you are in the editor at all?

[chrome bay]

@limber gyro it's called everytime

[limber gyro]

ty

[limber gyro]

Is there a proper place by design that i should be setting the players team?

if i call it on post login its gonna call it on a recconect and erase the previous team selection

im looking to make it like LoL or CS:GO ranked where the team is only set once

adn then the player state holds it for a recconect

[timid moss]

I would say game mode. Pretty sure you can just cache the team the player is on in the game mode by associating their playerstate's playername variable with the team they are on. That way when they leave and reconnect you can do a check in postlogin that sees if the player was already assigned a team and if yea, then just assign them that team.

But then again a lot of online games don't remember what team you are on if you rejoin a game, because of autobalanceing (having same amount of players on each team). Not sure how your game works but in my opinion if they leave the server and then rejoin it's kind of their fault and i wouldn't bother trying to put them on the same team they were on before. Lots of games do it this way like team fortress 2

[winged badger]

@limber gyro HandleStartingNewPlayer override is what i'd recommend

PlayerStates persist through disconnects for up to 5 minutes by default

[twin juniper]

Can change the time? Was looking for something like this

[limber gyro]

@timid moss im trying to do ranked match making so rebalancing is not an option unfortunately

@winged badger i will check it ou

out''

@winged badger by the way how do i make the player state stay indefinetly?

other question, say player X connects, than disconects and 30 seconds later i get its player state from the controller in the postLogin function, will it return the same game state or a new one?

[limber gyro]

also i cant find anything usefull on HandleStartingNewPlayer, does this function only run once for each new player? does it not run on reconnects?

[half gust]

Does anyone know why the dedicated server online stops working at 4.19? https://wiki.unrealengine.com/Dedicated_Server_Guide_Steam

[limber gyro]

ttry this

https://variable63.wordpress.com/2019/09/27/how-to-build-unreal-4-4-23-0-from-source-code-and-server/

oh might not, work u need it for steam

[grizzled stirrup]

Is it equal to have a replicated AActor* as it is to have a replicated int32 in terms of bandwidth? Both are 4 bytes right?

[hexed merlin]

The actor replication doesnt just copy the pointer, since the two actors are completely separate in reality, so the engine will (likely) do some behind the scenes stuff to correlate the two properly

in terms of bandwith, i dont know, might be just a pointer

or an id or whatevs

[bitter oriole]

@grizzled stirrup Pointers are 8 bytes on 64b

But pointers aren't replicated directly

[grizzled stirrup]

The IDs replicated are 4 bytes right?

Heard that around somewhere

Might be easier to just use a uint8 in this specific case ( I have a pickup that has a "PickedUp" state that needs to sync but previously other clients needed to know who picked it up hence the replicated AActor*)

But I don't need that anymore so can just probably do the cheapest thing possible which is a replicated uint8 OnRep function

Or replicated bool rather (uint8 = bool right?)

[limber gyro]

Guys i really need some help on this, my server is crashing anytime a player does alt+f4, is there any way to simulate this on the editor?

[modern bone]

I added support for Steam into Multiplayer but when it opens the level, they get sent back to the main menu, how do i fix this?

[limber gyro]

check their logs to get a clue on whats happening

[modern bone]

where do i find the log?

[limber gyro]

urproject/saved/logs

[modern bone]

im not sure what any of this means ._.

[twin juniper]

What is a good networking solution for a FPS?

It seems like p2p is the cheapest but would require host migration

[hollow stirrup]

Unreal doesn't support p2p out of the box, that would require a lot of custom implementation.
Out of the box Unreal supports dedicated and listen. The best would be to do dedicated, and depending on how large scale your game is you might want to provide a custom Replication Graph (although it wouldn't be required, just recommended)

[limber gyro]

@modern bone u gotta find the part where u try to connect and get sent back, are you sure you are experienced enough to handle multiplayer?

[modern bone]

it works when steam is closed but when steams open it send back to the menu.

[limber gyro]

it looks to me that somethign is wrong in the way that you set up steam

[modern bone]

i think i may have forgot a file to code, ill let you know within 30 minutes

[limber gyro]

its complaining about broadcasting so i am assuming steam is not letting your players know that a server to connect exists

[modern bone]

well how would i fix it?

[limber gyro]

no idea dude, i havent done steam integration yet and i dont plan to haha

maybe you followed an old tutorial with missing steps

[twin juniper]

@hollow stirrup what is unreal engines default networking, is it not p2p?

[limber gyro]

no

dont think so

[hollow stirrup]

@twin juniper client/server model

[twin juniper]

It’s going to be a 16 player multiplayer game, and games will last 15-20 mins

So kinda fast paced

[hollow stirrup]

You are going to want dedicated servers in that case

[twin juniper]

But I did the math and it’s like 64 servers for 1k people right?

[limber gyro]

true, my localy hosted minecraft server would lag with 4 players hahaha

[hollow stirrup]

What. Each server instance would be hosting their own session that the clients connect to. A single physical server (depending on the specs) could run two or three different server instances without any trouble.

[limber gyro]

hes propably talking about sessions

[hollow stirrup]

Even still, don't know where he got those numbers

[limber gyro]

16*64

1024

[hollow stirrup]

Yeah, I got that.

[limber gyro]

thats how he got that number lol

[hollow stirrup]

I meant, I don't know why that is a problem. That's literally how dedicated servers work, the more players you have the more servers you need

That's a no brainer

[limber gyro]

@hollow stirrup do you happen to know how to debug a shipped server?

[twin juniper]

Well let’s just say a oc i7 from ovh is 120 how many instances do you think can run off the one dedo

[limber gyro]

it probably has more to do with your internet connection

[hollow stirrup]

Depends on your game and how well you developed it @twin juniper

[twin juniper]

Gotcha, guess it depends on how many messages are being sent to server

[limber gyro]

i dont think server are particularly heavy computation wise, unless your running world generation or some other weird stuff

[hollow stirrup]

You are not asking the right kind of questions

Asking how many instances can run on x hardware is a open ended question that no can answer expect you

[twin juniper]

Ok no need to be rude, this discord’s for help isn’t it?

So that’s what I am doing

[hollow stirrup]

bruh, I wasn't being rude. I'm telling you that in order for you get the most help you have to ask the right questions

[limber gyro]

Rude? is this twitter?

[twin juniper]

Has anyone heard anything good of photon?

[limber gyro]

whats that

[twin juniper]

It was a popular solution in unity

Saw they had unreal support

But don’t know how efficient there networking is, doesn’t seem like many ue users know about it

[hollow stirrup]

@twin juniper https://improbable.io/spatialos

[twin juniper]

Unrelated side comment, I personally met some of the people working at Improbable/SpatialOS here in Guangzhou, good people 🙂

Dang ok, thanks @hollow stirrup

this is what I was looking for, paying only for what you need

[hollow stirrup]

Just have to ask the right questions

[twin juniper]

Damn spatial os supports so much

[hollow stirrup]

Yeah, I've been using it for a while. It's pretty fantastic

Takes a bit to setup, but once it's running it works really well

[twin juniper]

It has matchmaking and stat saving which is what i needed lol

[hollow stirrup]

It has full support for the gameplay ability system too

[twin juniper]

wym

[hollow stirrup]

GAS is a plugin in UE4 that adds support for RPG/MMO style stats and abilities. They used it in Paragon and are currently using it in Fortnite

https://github.com/tranek/GASDocumentation#intro

[twin juniper]

oh gotcha

[twin juniper]

So if there are no players on my servers using spatialos, I dont pay anything?

[urban dew]

how can I make it so when a player leaves the server, it saves their location, and upon rejoining, will start at that location, and on that note, if the servers shuts down, it needs to save these details in a text file or something?

[twin juniper]

Onpostlogin / something like that probably, youd probably want a database to store the files

[urban dew]

spatialos github?

does that cover what i'd need here?

[twin juniper]

No I am pretty sure spatial os is just cloud servers, not database, I mean like SQL

if its stored in a txt on a server, player cant change their location, if its on their computer, they can change the location they spwan

[wet oriole]

Hello guys,
I set the SessionSettings.NumPublicConnections to X and after finding sessions I can see the maximum number of connection, but after server travel in the game mode when I try to read that number from GameSession->MaxPlayers that shows 16 not the X amount i set in the session setting.

I can read that property using the session interface but I want to know why GameSession is not update in the game mode?

[rich ridge]

@twin juniper don't use spatialos. Please @hollow stirrup don't recommend this solution. If you do recommend this solution first ask the person whether he is son of Bill Gates or not.

Spatial os themselves say that they are damm costlier than other solutions.

[bitter oriole]

Not to mention SpatialOS isn't a get-out-of-jail-free card either for all multiplayer problems

[rich ridge]

@twin juniper if you use really high end server with 64 core CPU and 196 GB RAM, then you would basically host your all 1K players to one server.

16 player match means one session , not one actual server

You can have 32 players playing on single cloud server.

It's you who will have to design the solution for this.

[twin juniper]

@rich ridge hi, where is the 32 players hard limit coming from? I'm curious, I really don't know.

[chrome bay]

There is no hard limit

We have 100

In theory you could set it to 200 and 200 players will be able to connect

[twin juniper]

I have a background in systems engineering, including cloud, that's why I was wondering 🙂

[chrome bay]

What the experience would be however... I can't say 😄

[bitter oriole]

It's more that 200 players start being quite a problem

[chrome bay]

I would also say it would be utterly pointless investing time and money into Spatial OS when there's a good chance you won't be able to get enough concurrent players to make it worthwhile anyway

Multiplayer indie games in the 2020's ppl

[twin juniper]

A few years back in my day job I was working in a data center with very high end servers, not related to the gaming industry. But I've seen some really high specs on server hardware

I was just curious if the concurrency limit is software or hardware based

I'm hearing is hardware-based, based on previous statements above, correct?

I mean, this is my interpretation from the previous comments above, that the software does not come with a built in limit

and it's up to whoever designs the multiplayer solution to come up with a load-balancing farm solution, right?

[bitter oriole]

The biggest issue is that 200 players on your client isn't manageable

Even a small rate of update start being problematic, and if these are animated characters, the performance is going to be a nightmare

[chrome bay]

Yeah definitely. Maybe 200 spheres

[twin juniper]

Of course, I understand. I was just interested in hardware versus software limitation. I totally understand that five concurrent users hardware demands are significantly less than 200 concurrent users

five concurrent users may be able to be accommodated on one physical or cloud server

whereas it's all like 200 concurrent users can do the same on one physical or cloud server

but an elegant load-balancing solution at the front end can solve the concurrency problem, right?

[chrome bay]

I'm no expert on the subject at all, but from what little I know about our situation we have third-parties that players rent servers from. The same physical box may host multiple server instances all configured for 100 players. My guess is they have their own software that manages load balancing etc since that's more of a server-hosts responsibility than a game engine one IMO

[twin juniper]

My Systems engineering background Agrees with you 😄

[rich ridge]

@twin juniper I said you can have 32 players. If you use more powerful server you can increase the limit

[twin juniper]

No problem, meanwhile we had a lengthy conversation about this 🙂

[chrome bay]

You'd be surprised how much you can get away with even on not-mega-spec machine when you restrict the server rate etc. enough

Some of UE4's default server/networking settings are... questionable

But my guess is they expect people to just want stuff working more reliably at first before they start squeezing things down

[twin juniper]

I'm not too concerned about the default networking settings, OSI model is universal 🙂

[chrome bay]

Oh I'm talking more about the game-level settings, actor update rates etc.

[twin juniper]

ah, I see

[rich ridge]

The main bottleneck is with the protocol used in UE4. They all are deprecated now.

All the latest development is being done in new protocols like quic protocol, grpc

[twin juniper]

What do you mean?which protocols in particular?

[rich ridge]

@twin juniper TCP

UDP

[chrome bay]

Everything game-level is UDP in UE4

[rich ridge]

@chrome bayyes they all are deprecated

Let's assume your game is for mobile and your player switched from mobile network to WiFi

Does these protocol support fast switching

With needing again handshake

[chrome bay]

Aren't both quic and grpc both basically the same as TCP though? I.e, they ensure reliability of data transfer?

I can't see that being faster than UDP

[twin juniper]

Yeah, it's possible there's some misunderstanding, I think like an IT engineer, and TCP/UDP is layer 4

[rich ridge]

@chrome bay yes TCP don't support network switching

[twin juniper]

gRPC uses layer 4

[bitter oriole]

UE4 is all UDP with some logic on top

[twin juniper]

Again, I apologize, but my IT background doesn't understand what you mean by network switching, which to me is L2/L3

depending if you need routing or not

[rich ridge]

Network switching means from mobile network to WiFi network

And I don't want my gameplay to be affected by this switching

[twin juniper]

I probably need to get familiar with the concepts as used by unreal 🙂

I am too used with the concepts as I learned them many years ago

The way I see HTTP in my mind eye: L7 piggybacking on L4/TPC, routed via L3 😄

[rich ridge]

@twin juniper http is half duplex

[twin juniper]

in English: application transported and routed 🙂

[rich ridge]

You can't use http for multiplayer

[twin juniper]

It was an example 🙂

not necessarily an accurate one

[rich ridge]

And TCP and UDP drains more battery as compared to quic or grpc

[twin juniper]

This is such an unexpected statement, based on my former training... I don't know where to put the = sign...

Because there is TCP/UDP w/o gRPC, But there is no gRPC w/o TCP/UDP

[rich ridge]

@twin juniper whatever you learnt from books doesn't always apply in real world

[twin juniper]

Of course, but speaking in terms of OSI model...

Okay Boomer May apply to me 😄

[rich ridge]

All the apps by Google uses quic and grpc

This is what makes Google apps to be a standard for everyone

[twin juniper]

I understand what you are saying of course, But this is my problem: there is TCP/UDP w/o gRPC, But there is no gRPC w/o TCP/UDP

[rich ridge]

I didn't understand

[jolly siren]

Does anyone know what could cause a certain player to not be able to connect to a dedicated server within the 60 second timeout? It happens fairly consistently with one user. This user has fast internet speeds and good computer specs. So I'm not sure what could be going on here. The dedicated server is within their region as well.

[twin juniper]

@jolly siren At the hardware level, can be routing or firewall or something like that

because if all the infrastructure is ready before the application layer kicks in, there is no reason why it shouldn't work...

Have your user do a simple test : telnet IP Port from their local machine In the command line of their OS, Be that Windows or Mac or android or whatever

If it works, it should work in less than 200 ms

[winged badger]

agreed, its most likely a routing issue on the hardware that is not under your control

[twin juniper]

if telnet fails, try a ping and/or a trace route

As the background explanation of possible reasons, I'm currently behind the great firewall of China, and without VPN ping/icmp/dns/etc all give random false results, because the backbone of the Chinese routing infrastructure messes with any request on the other side of the firewall 😄

And usually simply stopping packets to cross the BGP 😄

[jolly siren]

This is a player in the united states. But I was thinking the same, that it was routing issues on the players end

[ivory lintel]

morning guys

[twin juniper]

@jolly siren It's still a good idea to go through some of those troubleshooting steps I mentioned, maybe you get a hint of where the problem is

late night here in China 😄 @ivory lintel

I'm from the future

[ivory lintel]

oh dude sorry^^

you are in a safe place from corona?

[twin juniper]

I apologize, NDA about an answer

[ivory lintel]

WTF kkkkkkkk

[twin juniper]

read it as you want, but don't think too much about it 🙂

[ivory lintel]

well...about ue4

i'm trying to reach some results like:
https://www.youtube.com/watch?v=JElyHh_CwPg
in my project...the difference is the multiplayer

already get some results with launch character node

but i don't think that him use launch character because is pretty different in the air combo

someone have any tip of how get better results like WIP above?

maybe him uses set movement mode to flying when in aerial combo in the target

maybe setting gravity when in the combo???

[thin stratus]

Quick sanity check. The Role of a replicated actor that has the PlayerController of a Client as Owner is?
ROLE_SimulatedProxy or ROLE_AutonomousProxy ?

[bitter oriole]

No relation

[thin stratus]

Are they always simulated, expect, e.g., the Pawn?

(viewed from owning client)

[bitter oriole]

Replicated, server-spawned actors on a client should always have SimulatedProxy, except Pawn

Owning or not

[thin stratus]

So a Weapon owned by the player and used by the Pawn, under no circumenstances, would be ROLE_AutonomousProxy

[bitter oriole]

I don't think so, unless the weapon class goes out of its way to do it

[thin stratus]

Right, good. Then GAS really doesn't allow prediction outside of the pawn.
sad story

[bitter oriole]

I mean, you don't need this for prediction

Roles are juste values

[thin stratus]

Yeah you do for GAS. They check the owner role of the GASComponent.

And if that's not Autonomous it won't proceed.

[bitter oriole]

Well you can just set it yourself then

Again, it's just a value

I've never used GAS so I'm unfamiliar with this

[thin stratus]

Let's say I do set it to ROLE_AutonomousProxy on the owning Client's version of the Weapon, wouldn't that break stuff?

[bitter oriole]

I don't think so. For instance, if you use GameModeBase, no class will even use ROLE_AutonomousProxy

Except PC I think

Which makes no sense anyway because PC is either locally owned, or authority

[twin juniper]

Multiplayer programming IQ is about 9999 in this server right now, two* of the best knowledged multiplayer programmers having a discussion lol

[bitter oriole]

Nah, I don't know much about multiplayer really

I'm just saying ROLE_AutonomousProxy isn't used a whole lot in the entire engine, it has maybe 10 occurrences, so I don't think a lot of behavior is baked into it

[chrome bay]

Yeah Autonomous Proxy is controlled pawn

everything else is Simulated Proxy

[bitter oriole]

@chrome bay AFAIK nothing prevents you from using it, though, right ?

[chrome bay]

Oh yeah totally

I mean, Role / RemoteRole is replicated though

[bitter oriole]

Right, that was my thinking