multiplayer

[twin juniper]

So its not an service where i can start dynamic servers? 😦

[bitter oriole]

Rent a bunch of machines, watch the online player count in your matchmaking system, start new instances

[twin juniper]

i mean which is a good combination System to handle servers then?

[cyan current]

It's like the Steam API but Epic

[twin juniper]

Ah, that explains it 🙂

[bitter oriole]

@twin juniper You can take a look at the cost of Gamelift, or AWS, or any other competitor

[twin juniper]

i am trying to do my project with aws gamelift right now

and its hard to setup and understand, i hoped epic did something like gamelift

[bitter oriole]

Well doing the kind of game you describe is for teams of 50 with a lot of experience

So yeah

[cyan current]

You'd have to sign a deal with them I guess if you want Epic to host servers for you

[twin juniper]

to get 100 players is for teams with 50+?

youre wrong informed

[bitter oriole]

Of course

Maybe not 50, but clearly not a small team

Think of the marketing budget alone

[twin juniper]

sure but just from the view of the technic behind a game

dont need a lot of developer normally

[bitter oriole]

Maybe only 15

[twin juniper]

also not that much

[bitter oriole]

If they're great

[twin juniper]

aws is not thaat complicated

So just for your information: i am using from Block Chop the Blueprint version inclusive docs

[cyan current]

Not even Blizzard can handle 100 players that great when they're in the same place, take that into consideration. Server crash 9/10 times judging from twitch streams

[twin juniper]

so i dont write everything in c++

Dont need 100 players on one server with gamelift

then i can split them but was just talking about 100 if i have only one server which is actually not a good idea

[cyan current]

I remember the Classic WoW launch, it took a good 5 minutes to be able to move cause there were so many players in the same area. You need to do a lot of optimization either way

[bitter oriole]

We had that conversation before but of course your game will likely never see 100 online players

No offense

[thin stratus]

What's with the peer 2 peer part. i can't check out the docs, not at my pc atm

[twin juniper]

i dont want to have 100 at the same time on one server

using gamelift, i can split them so

[bitter oriole]

I'm talking "overall players for the entire gaùe"

[twin juniper]

why is that impossible for me?

[cyan current]

You mean this? @thin stratus

[bitter oriole]

Because 100 online players mean you are in the top 4% of all Steam games in terms of player count

Means 96% of all Steam games perform worse than your game

[twin juniper]

100 players are not that much to get

[bitter oriole]

Yes, it is

[twin juniper]

or at least 70

with a good idea not 🙂

[bitter oriole]

I just gave you the numbers

Top 4% of Steam

[thin stratus]

@cyan current yeah

[bitter oriole]

70 is top 5%

Well, 50 is 5%

If your game needs 50 online players total (meaning they are all in the same game, which probably sucks), it means you need to do better than 95% of all games

Just simple math

[twin juniper]

doesnt need but i am sure there will be

already have a community, but doesnt matter, just spamming the chat here 😮

Could that all be used by blueprints only?

[bitter oriole]

If you're already past 50,000 wishlists on Steam, cool, you're good to go

[twin juniper]

all = epic services like matchmaking, friends etc

[bitter oriole]

And no, it's not even properly integrated into UE4 C++ right now

[twin juniper]

Oh okay

you guess it would be able for blueprints later?

as official or plugin by an other developer?

[bitter oriole]

Probably a year or two from now there will be a Blueprint interface

[twin juniper]

is it so hard to make blueprints? 😮

never saw how a blueprint was made

[bitter oriole]

Not that much, it's just that people doing multiplayer don't care much for doing sessions in Blueprint

Multiplayer without C++ only takes you so far

[twin juniper]

i feel Blueprints very relaxing 😄

way better overview etc

[bitter oriole]

Programmers find Blueprints very stressful since you need the engine to work to even open them up, instead of source code you can read on your phone while on a train

[twin juniper]

ah okay, i can understand that view

Can i disable auto connect in UE4 Settings?

i thought it was in older versions there but i did not find a setting in 4.25

[bitter oriole]

Dunno what that is

[twin juniper]

normally if you set editor settings to 2 clients, Play as client and run a dedi in the background, they get automaticly connected to the server

which i dont want before they logged in 😄

[bitter oriole]

I wouldn't know about that. I'm a simple mortal, so I don't use dedicated servers.

[hybrid wren]

HI there, I have an issue (again ... 🙂 ) I'm trying to spawn character on my multiplayer map. It start with everyone using spectator pawn while showing a lobby interface until all player has join a team. Once everybody joined a team, the host can start the game. So I'm iterating on a playerController array referenced in my GameMode, spawn an actor (Character) and possess it for each player controller of the array. Things is, only the host can move the character ... Do I need to do a RPC to possess in client side ?

[twin juniper]

Where is that setting now?

[worthy apex]

Hi guys, can I do NetMulticast of a standalone local coop game?

[bitter oriole]

No, this is for Net (online MP)

[twin juniper]

no one has an answer of my problem? 😮

[thin stratus]

@worthy apex No, there is also no need to. You have accesss to all PlayerController and Pawns, as well as PlayerStates.
And every other Actor in the game literally only exists once.

[worthy apex]

Alright thanks

[hoary lark]

the "auto connect to server" option does, in fact, appear to have been vaporized lol

[twin juniper]

Gues so

I have a big weird bug in UE4, probably someone has an explanation about that

i have started my game in the editor as standalone. with a seperated server. 1 Player and NetMode set to Play Offline. i closed the server and started then the client. Why the OnPostLogin will be still called and isServer Function returns true??

[peak star]

I am excited for Epic Online Services. This sounds like something that will solve my problems I had where I felt like I was either limited to using Steam OSS or rolling my own.

[silent phoenix]

Sorry if this is a stupid question but if I had to use Steam OSS Advanced Sessions to get players to be able to connect to a dedicated server hosted on AWS will I be able to use EOS instead?

[thin stratus]

Theoretically yes

EOS should do similar than Steam

[silent phoenix]

I'm still new to all this but steam OSS was the only way I could get players onto my dedicated server and support proximity voice chat. I don't need to it for any of the other features and would rather not use it if i don't need to

[twin juniper]

i have changed from pie in external window to standalone and standalone loads even without a server a map which i have not setup in the settings. How could that be possible?

[cyan current]

EOS offers voice chat for free aswell @silent phoenix

[dry cloud]

Do we know how EOS and steam will work together?

I hope for indies they don't have to end up managing two systems

[twin juniper]

anybody know why my gun isnt reloading just the hand is third person? acts like its not attached to hands

[thin stratus]

@dry cloud Well given you can't do Crossplatform with any of the default oss, I do think that eos would resolve that

At least last time i read about it, epic stated that eos woild exist ontop of the other oss, and communicate between them. Not sure that's all in/available

[deep flare]

I'm following a tutorial course for making a survival type game in C++ with multiplayer included. I'm getting an exception thrown on the ReplicateSubobject() function call in my inventory class.

I noticed this in the output when trying to run it. Apparently the AK47 blueprint item doesn't support networking? Just wondering if anyone here might know some amplifying information on what specifically causes this. The Item class in this was based off of UObject (I assume to make it really generic) and doesn't seem to be able to use SetIsReplicatedByDefault()

[2020.05.13-19.57.26:447][413]LogNetPackageMap: Warning: FNetGUIDCache::SupportsObject: BP_Weapon_AK47_C /Game/StarterContent/Maps/UEDPIE_0_Minimal_Default.Minimal_Default:PersistentLevel.BP_SurvivalCharacter_C_0.BP_Weapon_AK47_C_1 NOT Supported.
[2020.05.13-19.57.26:447][413]LogOutputDevice: Warning: 

Script Stack (0 frames):

Assertion failed: Object->IsSupportedForNetworking() [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Engine/Private/PackageMapClient.cpp] [Line: 2466] 

UE4Editor.exe has triggered a breakpoint.

The program '[12828] UE4Editor.exe' has exited with code 0 (0x0).

[barren warren]

@deep flare you need to enable replication for classes that don't inherit from actor, any subclass of Actor should support replication pretty much out of the box

[deep flare]

I figured that might be the case, but I can't call any functions to set replication in this class. Or at least, I don't know how. It's based off of UObject.

The instructor implemented a lot of custom stuff that was supposed to let it replicate, but apparently I messed something up or it doesn't work in 4.25.

void UItem::MarkDirtyForReplication()
{
    // mark item for replication
    ++repKey;

    // mark inventory for replication
    if (owningInventory)
    {
        ++owningInventory->replicatedItemsKey;
    }
}```

like that

[ionic mountain]

I'm working on a Multiplayer BP project, so far so good. But I have an issue with the player Material for differentiating teams (Red vs. Blue.) But when I set the Materials on one character, it duplicates it for all characters. When I boot up the game in multiplayer on my PC my character is Red (how I have my team set) but when my Wife joins she is ALSO Red on my screen, even though she's set to the Blue team. However, on her screen we're both Blue. What am I missing?

This is how I'm setting the skins, it is being done through the Game Instance. Controlling Actor is the character I want the server to change (using "Self), the Model is the Skeletal Mesh (UE4 Mannequin) and the Body/Logo skins are as you'd imagine - Different color Material Instances for the UE4 Mannequin.

[peak star]

@twin juniper project settings > maps and modes : check all 4 map defaults: startup map, editor startup map, travel map, and server default map.

@ionic mountain what happens if you use a dynamic material instance instead?

[ionic mountain]

I'll check and let you know!

[twin juniper]

@peak star i did, there is not my map setted

[peak star]

@twin juniper launching in PIE always starts the game in whatever level you are currently editing. Launching other ways launches from the game startup level set in your project settings.

[twin juniper]

Yes but i have not set the map anywhere so i am wondering why the game is loading the map

[ionic mountain]

@peak star Still changes every material for that particular player.

[shut gyro]

Is it good to now go all in on EOS instead of Steam?

[bitter oriole]

Depends if you are shipping on other platforms

[shut gyro]

Yea - Steam, Oculus and Playstation are my goals

Wonder what they are doing with Oculus 🤔

[bitter oriole]

PS likely won't allow EOS for now

[wet cliff]

Hi there ! Is anyone "Ball replication" expert ? simple zero gravity ball over network. I think i have missed something relating to movement component.

[peak star]

@ionic mountain oh i thought the problem was it was changing every player to that material

[ionic mountain]

It works now, I had to use a repnotify to change the material, then pass the information along through an event. But yeah, it was changing ALL player materials locally to the color instead of the individual client/server actors.

[meager spade]

gg glad ya got it sorted 😄

[ionic mountain]

With your help - Thanks!

[meager spade]

anytime 😄

[solemn glacier]

Hi Guys! I'm using ClientTravel to connect players into a lobby, however if there is an error connecting to the lobby the game will kick back to the home screen, is there a way to get Unreal to stay on the current screen if the ClientTravel call fails?

[worldly raft]

Hello, does anyone know a good, COMPLETE, tutorial for a multiplayer inventory system?

[meager spade]

well inventory systems come in all types, shapes and sizes

[shut gyro]

Has anyone used the SDK sample examples?

[meager spade]

so thats a bit of a broad question

[shut gyro]

talking to me? @meager spade

[meager spade]

no

[worldly raft]

@meager spade hello, yes that’s true. I should have been more specific. I would like to learn how to build a slot based, multiplayer inventory system that has drag and drop capabilities, hot bar, equipment slots and scope for crafting. All the tutorials I have found and followed only get so far, then just stop without completing the system 😩

[timid moss]

Anyone know the differnce between Development server and Shipping server?

[cyan current]

https://docs.unrealengine.com/en-US/Programming/Development/BuildConfigurations/index.html @timid moss

[mild ingot]

Can someone help me find out why my game isn't detecting Steam? @ me if you can

[thin stratus]

Hey all! Please check the recent #unreal-news. To make sure no EOS discussions and questions spam the #multiplayer channel, we've created #epic-online-services right below it.
So if you have Epic Online Services questions or discussions, please visit our new channel for it! Also please make sure to aid us mods a bit by redirecting users to the new channel!

[mild ingot]

(What's Epic Online Services?)

Oh, looking at that post it's like Steam Subsystem?)

[random nymph]

@fossil spoke did you get the steam working? Turn out my solution didn't work after all

[fossil spoke]

Im just testing a new fix soon, my local tests revealed that some Steam DLLs werent in the expected location when it was on GameLift.

They had to be moved into the <ProjectName>/Binaries/Win64/ folder with the Server executable.

Im uploading a build to GameLift now to test if it works.

[random nymph]

Okay

[mild ingot]

Wait, in what way is Steam not working for you? Because Steam's not working for me either, so maybe I can look at what you did?

I had to move Advanced Sessions to my Project folder and ever since then, the "Has Online Subsystem" node never works

Oh wait, I don't have Steam DLLs in that folder either

maybe that's why

[random nymph]

Not working on amazon gamelift when trying to use multiple processes

[mild ingot]

oh

But would not having the DLLs in <ProjectName>/Binaries/Win64/ cause it to not work?

Because they're not there

[random nymph]

Yes that is could cause it to not work at all

[mild ingot]

steam_api64.dll, right?

Found it, moved it, I'll give it a shot

@random nymph Ok, it still can't find Steam. Any more DLLs I might need? Or should I move the whole Steamworks folder? or?

[random nymph]

In WindowsServer\Engine\Binaries\ThirdParty\Steamworks\Steamv146\Win64 path I have steam_api64, steamclient64, tier0 and vstdlib_s64 dlls

And also those same dlls in the same folder as the server executable

[mild ingot]

should I copy all those to <ProjectName>/Binaries/Win64/

[random nymph]

Yes you can try

And I also have the steam_appid.txt in the same folder as the executable

[mild ingot]

Ok, in E:\Unreal Projects\MultiplayerTutorial\Binaries\ThirdParty\Steamworks\Steamv148\Win64 I only have steam_api64.dll. That might be a problem. I'll look in the Engine location

Ok, no, in the engine one I only have steam_api64.dll too

hmm

Ok I don't have those other 3 in Engine either, and it was working fine in Engine (except it wouldn't package), so idk what's wrong

@random nymph Want to help me troubleshoot this? It's alright if you don't, it's just you seem to know how to get this to work

[random nymph]

Honestly I don't know very well how to get it working 😄 I just started looking into steam implementation this week myself for the first time and part of it was done already by another person :/

[mild ingot]

Ok, It's just that nobody seems to know how to do this stuff here, even though it's a big server

[bitter oriole]

I don't believe any DLL copying is needed

Steam's working fine for me and I never needed any of that

[mild ingot]

yea, I copied those additional 3 and it still doesn't work

[winged badger]

it used to be for one specific case around 4.12

[bitter oriole]

So what doesn't work ?

[cosmic marlin]

is it possible to build a dedicated server without downloading ue4 from source?

[bitter oriole]

No

[mild ingot]

@bitter oriole Ok, the "Has Online Subsystem" node returned true when Steam was enabled when the Advanced Sessions plugin was in the Engine folder. However, since that would cause a crash on Build or Package, I had to copy it to my Project folder. Now I don't get a crash, but "Has Steam Subsystem" always returns false even if Steam is on

*Has Online Subsystem

[bitter oriole]

Do not put Advanced Sessions in engine folder.

Not needed, might break packaging.

[mild ingot]

It did, until I copied it into Project/Plugins

[bitter oriole]

Now - how did you package, devel or shipping ?

[mild ingot]

should I delete it from Engine?

[bitter oriole]

Yes definitely

Never put plugins in Engine ever

[mild ingot]

Ok

one sec

[bitter oriole]

Now if you package from shipping, it's normal for Steam to not work

The game has to be launched from Steam for it to work

[mild ingot]

how do you do that

it didn't need that before

[bitter oriole]

Create your Steam page, upload binary, install game on Steam

Unless you put your steam_appid.txt file next to the executable

[mild ingot]

Which is easier

[rose egret]

in terms of network is AActor->Destoy() light ? it just sends a destroy RPC to clients ?

[bitter oriole]

if you don't have your own Steam ID, put a steam_appid.txt file with '480' next to the executable in Project/binaries/ in packaged

[mild ingot]

ok

[bitter oriole]

Or just package in Development and have no problem at all

[mild ingot]

just the text 480?

[bitter oriole]

Or don't package at all

Just right click the uproject and press "launch" if you're just developing for now

[mild ingot]

ok

but does the text file just say 480 then?

[bitter oriole]

Wait

You mentioned packaging so I'm guessing you fully finished implementing Steam and it just doesn't work in shipping packaging

But if you are just starting,

Just right click the uproject and press "launch" if you're just developing for now

the appid thing is only useful for shipping package

[mild ingot]

The reason I packaged earlier is because it was crashing on "Build" and someone said that the error I got meant I had to Package it first

anyway, I launched, and it still doesn't detect Steam

[bitter oriole]

Did you set the OSS to Steam in .ini ?

[mild ingot]

which .ini

engine?

[bitter oriole]

https://docs.unrealengine.com/en-US/Programming/Online/Steam/index.html

DefaultEngine

"Configuring your Application's Settings" is literally the only thing to do for Steam to be available

And having Steam running I guess

[mild ingot]

I think I've been through here before but I'll go through it again and report back when I'm done. Hopefully this is all I need to fix it

[bitter oriole]

+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Steam

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480

[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"```

This is 100% of Steam's setup on UE4

Unless for shipping package which has the appid file thing on top, if you want to play it outside Steam

[mild ingot]

"If you're compiling Unreal Engine 4 from source ," What does this mean

[bitter oriole]

If you don't know, it's not relevant

It's for people who get the engine source from github and compile it themselves

[mild ingot]

ok

It says I need 4 DLLs but I only have steam_api64.dll

is this a problem

[bitter oriole]

You can entirely ignore this step

Just change the ini

[rose egret]

if I change a replicated property and call a muticast at the same frame on server like following :
Actor->PendingSwitchWeapon = newWeaponIndex; Actor->MuticastSwitchWeapon(CurWeaponIndex, newWeaponIndex);

whats the execution order in clients ? first multicast is called then on_reps ?
I need the multicast to be executed before any OnRep_

[mild ingot]

ok

[bitter oriole]

@rose egret Undefined

[rose egret]

as far as I know replication and RPCs are sent in the same packet

[bitter oriole]

Nope

[mild ingot]

Which DefaultEngine.ini is it? I have 3

[bitter oriole]

Project one

[mild ingot]

no, in the project I have 3

[bitter oriole]

You have 3 DefaultEngine.ini files ?

[mild ingot]

one in Config, two in Saved

[bitter oriole]

Config

[rose egret]

@bitter oriole even on one actor ?

[mild ingot]

ok

[bitter oriole]

@rose egret Replication has variable rate so it might replicate half a second later for that particular variable ; the first RPC might be lost to packet loss and be re-sent, and thus arrive after the replicated variable.

Make zero assumption on multiplayer timings

The only sure thing, is that Reliable RPCs will have order preserved for a given actor

Anything else is unsafe

[mild ingot]

ok that stuff was missing from the DefaultEngine

[rose egret]

even if I do this :
Actor->PendingSwitchWeapon = newWeaponIndex; Actor->MuticastSwitchWeapon(CurWeaponIndex, newWeaponIndex); Actor->ForceNetUpdate();

[bitter oriole]

Yes

For the reason I just outlined

Reliable RPC might be lost and re-sent

Replication might be lost and re-sent

Make no assumptions

[mild ingot]

@bitter oriole Do I have to rebuild or something, or should it work straightaway once I add that to DefaultEngine

[bitter oriole]

No need to build anything

[mild ingot]

ok

[bitter oriole]

Right click uproject, launch

[mild ingot]

Still not working

[bitter oriole]

Alright, what's the log file ?

[mild ingot]

can't find Steam

where can I find the log file

[bitter oriole]

Saved/log/project.log

[mild ingot]

ok

[bitter oriole]

pastebin

[rose egret]

so how do I implement my weapon switching. I already did it with OnRep only. it worked but I am not sure whether its stable. so though I could write a better design with muticast andOnRep_.

[bitter oriole]

The safe way is to not have any event or multicast

Just replicate the current weapon index

On tick for all clients, if index != current weapon, then switch

[rose egret]

thats my fellow currently:
OnSwitchWeapon:
get current weapon.
play arm lower animation.
when animation finshed get the new weapon and make it visible.
play raise animation.

[mild ingot]

@bitter oriole https://pastebin.com/t8gHfkJC

[rose egret]

btw I dont play animation on server its just Timer

[bitter oriole]

LogWindows: Failed to load '../../../Engine/Binaries/ThirdParty/Steamworks/Steamv139/Win64/steam_api64.dll' (GetLastError=126)
LogWindows: File '../../../Engine/Binaries/ThirdParty/Steamworks/Steamv139/Win64/steam_api64.dll' does not exist
LogOnline: Warning: STEAM: Steam SDK 1.39 libraries not present at ../../../Engine/Binaries/ThirdParty/Steamworks/Steamv139/Win64/ or failed to load!```

Did you modify the DLLs in the engine ?

[mild ingot]

I don't think so? let me look

[bitter oriole]

Verify the engine in the launcher and then retry

[mild ingot]

Oh. It's Steamv148

how do I change that

should I change the folder name? Or somewhere else

[bitter oriole]

Change what ? Verify the engine to remove your changes, and retry.

[rose egret]

@bitter oriole thats what I already do.

https://pastebin.com/Nu6J5EP5

[mild ingot]

@bitter oriole How do I tell it to look for SteamV148 instead of V139

[bitter oriole]

@mild ingot

Verify the engine in the launcher and then retry

You do not want or need Steam v148

Just use what's in the engine

[mild ingot]

But the version of Steamworks that I have is v148

[bitter oriole]

You do not need a particular version of Steamworks

[mild ingot]

But that bit of the log that you pulled said it is looking for v139 and I have 148

[bitter oriole]

Literally, you only need the ini change on a vanilla UE4, zero additional work needed, you do not need steamworks, you do not need to build anything

You have modified the DLLs to use another Steam

So verify the engine

[mild ingot]

Failed to load '../../../Engine/Binaries/ThirdParty/Steamworks/STEAMV139/Win64/steam_api64.dll'

[bitter oriole]

This is caused by you deleting this

[mild ingot]

I didn't delete it

It's just that it is '../../../Engine/Binaries/ThirdParty/Steamworks/Steamv148/Win64/steam_api64.dll'

and it's looking for '../../../Engine/Binaries/ThirdParty/Steamworks/Steamv139/Win64/steam_api64.dll'

[bitter oriole]

Which UE version do you use ?

[mild ingot]

4.21?

I think?

[bitter oriole]

4.21 comes with 139

4.25 comes with 147

You have 148 because you put it there

So verify the engine to remove your changes

Last time I say this

[mild ingot]

Oh. I think I did get rid of the older version, yea.

I'll try that

[bitter oriole]

This is caused by you deleting this

Like I said

[cosmic marlin]

@bitter oriole Can you explain the architecture of a game like Call of duty. There is a one master server and then when a match starts of player becomes a server. So is the master server(dedicated server) and when match starts player becomes a listen server? is this how it works?

[bitter oriole]

Sorry, I did not work on Call of Duty

[mild ingot]

But when it was working before, it was still v148 and it worked

wierd

[cosmic marlin]

@bitter oriole but are you familiar with architecture i just described?

[bitter oriole]

No

Master servers are not dedicated servers

Why are you tagging me, too ?

[rose egret]

if I change the replicated properties in the same frame . is it guaranteed that either all changed properties of actor replicate to client or nothing at all ?
I dont want them to arrive from diffrent packet.
actor->PendingSwitchIndex = 1; actor->ArmState = EState::Switch;

[bitter oriole]

Nope, not guaranteed

[rose egret]

dude are you sure ?

[bitter oriole]

Yes I am very sure, dude

[rose egret]

UE4 replication suks

😂

[bitter oriole]

It doesn't

You can use an Atomic USTRUCT if you want atomicity on multiple values

There, problem fixed

Out of the box, you don't want this

[rose egret]

so its possible that engine send a packet for updating some of the changed properties ? in some weird condition like congestion ?

[bitter oriole]

It's possible and a desired feature of the engine

[rose egret]

so what should I do . putting them in one UPROPERTY ?

[bitter oriole]

You can use an Atomic USTRUCT if you want atomicity on multiple values

[rose egret]

what the diffrence between atomic USTRUCT and normal USTRUCT. I should override netSerialize ?

[bitter oriole]

No need

Just mark it atomic

Normal ustruct will behave just like actors, replicating property by property

[rose egret]

🤔

[mild ingot]

Ok I think it worked now

[bitter oriole]

The UE4 doc is quite misleading on this whole setup, to be fair

To the best of my knowledge, you only need the DLL copying and stuff if you're building from source and you want the latest sdk

[plain current]

Question 4 Pros:

I'm exp webDev 6+ years coding.
Totally new to gameDev though.

Roughly speaking, how hard is it to setup a multiplayer game?

so that the basicas are there, I can make a simple thing where both users can be on a cube and move around

or maybe, how long would that take, with lots of programming exp and 0 gameDev exp

and 0 UE exp

are we talking 10 hours? week? month!?

[barren warren]

Technically you can get that in about 30 seconds by using one of UE4s example projects

[plain current]

wow

hey Fin

making a single player and multi player game

what would you say is the difference

in complexity/difficulty level?

for some reason I have an impression that multiplayer in game dev is complex

I assume you just need a nice SDK or set of APIs

some sort of setup with listeners and triggers to stream from client to server

[barren warren]

It's certainly a big difference in mindset - Instead of just programming the game, you need to think from the perspective of 3 different processes at any one time (Is this on the server, is this the player, is this another player on a clients machine). There's a lot of subtleties there and gotchas. From a mindset perspective if you're good with being able to visualise data moving around multiple moving parts it should be easier to get into.

It's at least an order of magnitude more complex than a single player game of the same type.

A lot of replication and the underlying mechanisms of networked play get handled for you by UE4, so as a developer, at least initially, @plain current it's more about getting into that aforementioned mindset of moving data around to the right places.

[humble comet]

Hey guys, when replicating custom struct with custom net serialize is there possibility to not replicate certain variables in all the struct?

[chrome bay]

depends. You need some way to know if the value was serialized or not

otherwise the receiver won't be able to deserialize it properly.

[humble comet]

I was thinking if there is some UProperty meta which would mark to not replicate that struct member

[chrome bay]

No

Well

There is, but if you use NetSerialize() it doesn't matter what you put on the UPROPERTY

NetSerialize() doesn't use any of the default UPROPERTY() serialization path, it assumes you know what you're doing and need a custom approach.

If you want to serialize things conditionally, you need to add another 'bit' to signify whether it was serialized or not

E.g, snippet from my code:

if (bNeedsBounce)
{
    SerializeVector(Ar, PreBounceVelocity, VelocityQuantization);
}
else
{
    PreBounceVelocity = FVector::ZeroVector;
}```

[humble comet]

Thanks @chrome bay, seems like I will have to do it this way

[chrome bay]

NetSerialize() is only for very special cases where you think you can do a better job than the per-property serialization of the engine.

By default the engine will only send properties which have changed inside structs.

NetSerialize() doesn't have those benefits.

[plain current]

Thaks @barren warren for putting it in perspective

[winged badger]

FHitTestResult has excellent example of custom serialization

[thin stratus]

FHitResult or?

[fleet raven]

you can also put UPROPERTY(NotReplicated) on struct members and get the same without a custom serializer

[winged badger]

yes, 🤦

[round hinge]

tutorial for "text input window" ?

[real yacht]

void ABasePlayer::ServerRotatePlayer_Implementation(const FRotator &Rotation)
{
    RightThumbstickRotation = Rotation;
    OnRep_PlayerRotation();
}

void ABasePlayer::OnRep_FootballPlayerRotation()
{
    
    SetActorRotation(RightThumbstickRotation);
}

And sometimes owning client doesnt rotate
but sometimes.. what can be a possible problem?
it rotates on all clients and server always, only on owning client sometimes NOT

if I rotate pawn 20 times, for example, 2 times doesn't apply rotation on owning client

what can be a problem?

[ember needle]

hey all, how do you handle character HUDs when spectating in MP? I'm talking about the typical ammo / health / hits HUDs. I'm trying to understand how to make a clean design.

[ocean geyser]

@ember needle are you trying to see the other players hud?

[ember needle]

yes

there are several ways to do that, i'm trying to understand what the best setup might be

I already have the spectating from the camera and all

but I need to show the HUDs

[ocean geyser]

you might be better off replicating those variables so when you spectate have it be able to access getter functions to get the values or have it fire off an event when those values change and use those values for the HUD?

[ember needle]

indeed these are replicated

sorry maybe i'm not asking the right question 🙂 HUDs are obviously local

so what is the correct approach: create a HUD on the spectated player and keep a reference to the character?

put the HUDs on the PC instead of the character?

and then have the PC know which player is being spectated?

[ocean geyser]

well you should have a pointer to the player that your spectating, so i would do a check in the HUD. if your dead and the player that your spectating (the variable) is valid (meaning your spectating someone) then change the HUD variables to equal that of the replicated variables of the spectated player

[ember needle]

ok so you'd first of all move all of the HUDs on the PC

if I'm understanding you correctly

right now they're on the character

[ocean geyser]

no, you would just do a branch on the widget that is your HUD in the areas that get/set the values to the HUD. so if your spectating then instead of displaying your own variables like health/ammo and such, get the variables from the spectated player and display those. see where im going?

[ember needle]

yes

the thing though is

you keep the same HUD but change the reference, where do you have this reference on, I'd imagine the PC?

the "SpectatedPlayer" variable

[ocean geyser]

depends on wherever is easiest for you. i would keep it probably in the player controller like you said

[ember needle]

yeah

[ocean geyser]

that way if you want you can have the server dictate who you can and cant spectate to prevent spectating enemys and such and keep that code out of the character

[ember needle]

thank you Cody

[tidal sail]

(maybe I should try asking here - ) I'm having trouble with the level override gamemode not being set on the joining client (joining via open 127.0.0.1), but it IS being set on the host (via open 'level'?listen).

It's completely insane and I can't understand why it doesn't work. unreal ver 4.25

there's almost no code - we set up a very basic 'sync project test', and I noticed the custom gamemode casts on whoever the host is, but not whoever the client is

[hybrid wren]

HI there, I'm having an issue with spawning characters but I noticed that after the host traveled to my map, the match state is set to Aborted. Does somebody knows what can trigger this ? thanks

[quasi wyvern]

can anybody help me to identify the plattform of a logged in? my current setup always returns the servers plattform...

[unkempt tiger]

Hey

I am in some desperate need of help because I'm completely lost

I want to write a game from scratch (with my own custom player (not using the build in Character) etc)

And I need all the good stuff: prediction, lag compensation, tick based events (with clients sending inputs to the server that are registered in future ticks), to benefit from the fixed timestep nature of my game

I am unsure what UE4 gives me from the box (for example FNetworkPredictionInterface - what is it about, is it just for UCharacterMovementComponent?), if I should use whatever it is UE4 gives me from the box, and in case I shouldn't - what are the core building blocks of networking I should work with? Should I use RPCs for networking? Something else?

I would ask more specific questions if I weren't so darn lost - if anyone feels like they have some wisdom to share with me I'd grant them my blessings 🙇‍♂️

[unkempt tiger]

@copper grove did you reply to my question, or did you refer to your blueprint?

[copper grove]

no sorry im actually deleting my question as i found out the error in the console log, didnt appear on screen

[unkempt tiger]

so i'll take that as a no :D

[copper grove]

first of all

start here

@unkempt tiger

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

there is no "right" answer to any of your questions

you could use a marketplace pack that has most of your needs, or build it from scratch

CMC has a lot of prediction built in (no expert though) but a lot of things you can not take for granted

youwill have to replicate variables, use RPC's

you could also check out the UE4 Content Examples

Network map

which has some examples of ue4 networking as well

its a long road, but luckily there are a lot of offical and non official videos out there

and lots of things written

[unkempt tiger]

Really appreciate it, just knowing there is no 'right' answer is a huge step forward in my case

I'm going to walk this long road and I will start with the .pdf you linked

But before that I was hoping you could answer a quick question about what you said, having to replicate variables

Is whatever UE4 calls 'variable replication' not in fact implemented via RPCs?

[copper grove]

2 separate things

[twin juniper]

Hi guys, Please why does this keep happening to me. I am using World composition and when I play in editor or when I package the game and connect to a dedicated server, this happens. The actors don't load on the server. Static meshes do but Actors dont.

[copper grove]

@unkempt tiger https://forums.unrealengine.com/development-discussion/c-gameplay-programming/111755-rpcs-versus-replication-and-onrep-events

[unkempt tiger]

😍

I just started reading the first link you sent, and it looks just like what I was looking for

I was so caught up in my own mess I didn't even manage to Google properly

[copper grove]

if you look at the official ue4 networking videos they explain this stuff as well in a way you can learn how to use it

start with the shorter ones first, id recommend

and then in the content example as well the examples are very well laid out

[unkempt tiger]

Oh, oddly every networking video I've seen so far had to do with the built in replication

[copper grove]

which combine RPC's and replicated variables

there is built in replication for character movement component, thats about it

you have to do all the rest

[unkempt tiger]

Thanks a lot dude, really

I've been staring at a blank screen for 2 days now with drool pooling under me

(I'm really bad at kick starting this kind of stuff)

[cosmic trail]

Anyone know how to replicate timers using GetWorld()->TimerManager()'s timers without replicating every tick?

Replicating the timer handle doesn't do anything, it's an invalid handle on the client, so I imagine the timers aren't actually being replicated themselves

[meager spade]

you cant replicate timers

not possible

Timers are local only

[cosmic trail]

Gotcha thanks. I will set another variable to replicate and duplicate the timer work then on the OnRep. Thank you!

[unreal pine]

I'm all of a sudden getting a lot of "No owning connection for actor" warnings. Haven't seen it before now - anyone know why they'd be popping up?

I think my RPCs aren't firing because the client-side version of the actor firing the RPC isn't found(?)

[fossil spoke]

In order for a RPC to occur, the Actor calling it needs to have an Owner Hierarchy that comes back to a "Net Owning Connection". That is typically a PlayerController.

[unreal pine]

So if the Controller doesn't exist (say for another player's pawn) an RPC that gets executed from a pawn won't fire on a separate client?

or would the owning connection be the local player's controller?

[fossil spoke]

Correct, a Simulated Pawn cannot call an RPC.

[unreal pine]

Gotcha

So, I'm getting this issue running an RPC from a level blueprint as well

[fossil spoke]

A Autonomous Proxy Pawn can, because that implies its owned by the local player which has a Player Controller.

The level blueprint cant call RPCs.

For the same reason.

Its not owned by a PlayerController.

Also you would never want to call an RPC in the Level Blueprint.

Thats poor design

[unreal pine]

So what if I have an event, say a car driving by, that needs to happen at the same time all all clients. But it's only important for it to happen on that specific level. Should I build the RPC into the car actor and place the car into the level? Rather than calling a sequencer?

that car actor would then be owned by each client, and able to execute RPCs I guess

I still think that's something that should be server authoritative though. That's why I had it running on server only, and had the sequencer replicating

but knowing what I know now, I just can't have that event happen in the level BP

[fossil spoke]

Think about it in terms of sequence of events.

What triggers the event first?

Have the Server detect that trigger, then get the Server to call an RPC on ALL PlayerControllers, the PlayerControllers can then freely run the Sequence locally.

[fringe dove]

is there a way to send RPCs only to something on the demo recording on the server? SetViewerOverride is only for demos being recorded on clients right?

[unreal pine]

So yea, I had it running as an "Execute on Server Only" RPC, but the client was still receiving a No Owning Connection for Actor

[fossil spoke]

Why is the Client calling an RPC to the Server?

[unreal pine]

the Level BP is calling the Server Only RPC

[fossil spoke]

It shouldnt be.

What actually causes the event to trigger?

Is it a Player action? Like a trigger overlap?

[unreal pine]

a timer

[fossil spoke]

What initiates the timer?

To start counting down?

[unreal pine]

😬 Begin play

lol

[fossil spoke]

...

[unreal pine]

I'm sorry

haha

[fossil spoke]

So the Server can do this fine then.

Have the Servers GameState start the Timer, then the Server can call an RPC on all PlayerControllers which initiates the sequence on the Clients.

[unreal pine]

So, would you recommend a custom GameState just for that level?

like inherited from my default game state

[fossil spoke]

Sure, or you could do it in the GameMode instead.

That might be a better option.

Since your most likely already going to have a custom GameMode for that Level?

Your other alternative is to create a unique Actor type that acts as a "Manager" for this event.

Then you can place that Actor in the level itself

[unreal pine]

I use the same game mode for most of my levels because I'd planned on having multiple options for GameMode at some point

But yeah, that makes sense

[fossil spoke]

Ok well then use a Manager actor

"CarSequenceManager"

Or whatever

[unreal pine]

Yeah, that makes sense

[fossil spoke]

Make sure its set to Replicate and then place it in the level, it doesnt need any visuals.

Its just facilitating the RPC from the Servers end.

[unreal pine]

💯

Thanks!

[fossil spoke]

Good luck 👍

[foggy idol]

So when I start my game for a brief moment the client is at the world origin before he possess's his pawn

Is there anyway to fix this delay

Because it doesn't happen on the server

[dreamy peak]

Whoa, I know Suckerbird Games!

[foggy idol]

Is there any function called on the player controller to notify that the client is ready ?

[fossil spoke]

@foggy idol The HUD is created immediately after the PlayerController has been properly initialized.

[foggy idol]

Even on clients ?

@fossil spoke

[fossil spoke]

The HUD is only created on Clients

[foggy idol]

Ohhhh

Thank you

Ill use that to notify that a client is ready

[fossil spoke]

Yeah well you know the Client is ready when BeginPlay is called in your HUD class.

[foggy idol]

Thank you Soo much

Because there's a noticable delay for client spawn when the game starts

[fossil spoke]

AGameModeBase::GenericPlayerInitialization calls a Client RPC on the Player which creates the HUD. At that point that Player is "ready"

[foggy idol]

Ohhh

[fossil spoke]

AGameModeBase::InitializeHUDForPlayer(APlayerController* PC) is called.

Which calls APlayerController::ClientSetHUD(TSubclassOf<AHUD> HUDClass) which is a Client RPC.

That then spawns the HUD.

[foggy idol]

Broooooooo how do you know all of this

I would have been searching for a week with this knowledge

*without

[fossil spoke]

Its in the Engine Source code?

[foggy idol]

Ohhh

I've never looked at it

[fossil spoke]

Fair enough.

[foggy idol]

Guess I better start

[fossil spoke]

Its good to know how things flow, even if your only working with Blueprint.

[foggy idol]

Yeah

I only started using c++ Monday

[fossil spoke]

@random nymph We finally got ours working.

Steam working with the Client, while the Server is running with IPNetDriver

[unreal pine]

@dreamy peak omg we're so famous 😂

I'm still getting a lot of these warnings, and players are teleporting around a bit - I can't find what could be causing this.

I mean, two instances on my machine shouldn't have very bad ping, right?

[random nymph]

@fossil spoke did you get it working using multiple concurrent processes?

[fossil spoke]

We havent tested it rigorously but our default Build settings for GameLift always give us 4 concurrent instances, so i assume its working.

[random nymph]

Did you try joining multiple games simultaneously or did you check the logs if steam is initialized correctly for all processes?

[fossil spoke]

No not yet, i only got it working recently, we havent tried getting multiple sessions filled and tested.

[random nymph]

Okay

[fossil spoke]

Technically our Servers arent utilizing Steam though just FYI.

[random nymph]

Do you add any port rules as launch parameters to the process?

Yeah but you are still using steam online subsystem also in your server?

[fossil spoke]

Nope, we just open 7777-7781 + 27015 or whatevre the Steam port is.

Not exactly, it is enabled, but its not our default OSS

[random nymph]

But if clients are using steam online subsystem when running from steam and server is not, doesn't that mean that clients cannot join the server because the net id isn't equal?

[fossil spoke]

No because the Client isnt using Steam OSS as default either.

Ive changed all our code to access the Steam OSS by name.

[random nymph]

Didn't know that is possible

[fossil spoke]

So even though its enabled and works, its not the default OSS.

!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="/Script/OnlineSubsystemUtils.IpNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="/Script/OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Null
PollingIntervalInMs=20
bHasVoiceEnabled=false

[OnlineSubsystemSteam]
bEnabled=True
bUseSteamNetworking=False
SteamDevAppId=<REDACTED>
GameServerQueryPort=27015
bRelaunchInSteam=false
GameVersion=1.0.0.0
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90

[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="/Script/OnlineSubsystemSteam.SteamNetConnection"```

Those are our settings.

IOnlineSubsystem* SteamOSS = IOnlineSubsystem::Get(FName("Steam"));

Im accessing what i can through the OSS itself.

[random nymph]

Okay. If it is done that way do we still have access to steam overlay etc?

[fossil spoke]

But regular platform features still work as well if called directly.

Yes if its launched from Steam.

[random nymph]

Okay, nice

[fossil spoke]

I was unsure if that would be the case as well, but turns out, it works fine.

Given this method, it also means that we could potentially support any Platform.

[random nymph]

Yeah. But there might still be some problems ahead if the steam OSS doesn't get initialized even if it is not used by default on server 🤔

[fossil spoke]

What issues do you think would come up?

UniqueNetId mismatch isnt an issue.

[random nymph]

I don't know if for example storing player values to steam database becomes a problem. Haven't used that feature so I don't know if it is implemented on server or client

[fossil spoke]

We dont use Steam like that, so it could just be specific to this use case.

[thin stratus]

https://beta.playvalorant.com/en-us/news/game-updates/04-on-peeker-s-advantage-ranked/

Valorant (Riot Games FPS) is done in UE4. Nothing reeeaaally new in this article, but they talk a bit about peeker's advantage and mid running kills. Maybe interesting for someone.

[random nymph]

Okay, and it might be that those things are handled through client anyways, needs investigating

[timid moss]

anyone know to join a steam session by IP?

[thin stratus]

@fossil spoke lol

[fossil spoke]

Heh

[thin stratus]

@timid moss If you have IP and Port, you need to actively ping the Server via the SteamAPI directly.
E.g. SteamMatchmakingServers()->PingServer(...)

The class you do this in needs to inherit from ISteamMatchmakingPingResponse so you get access to virtual void ServerResponded(gameserveritem_t& server) override; and virtual void ServerFailedToRespond() override; ,
which you can override then. When calling PingServer, you need to pass this along, so Steam can use the interface functions for callbacks.

Once you have that working, you'll receive the SteamID of the Server inside of the gameserveritem_t& server. With that you can call the usual ClientTravel code on the PlayerController, using steam.STEAMID:PORT.

[fringe dove]

I'm using this to get the demo recording spectator on the server during play, and then trying to send a client RPC to it:

APlayerController * USprawlFunctionLibrary::GetDemoRecordingSpectator(const UObject* WorldContextObject)
{
    UWorld* World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull);
    if (World != nullptr)
    {
        UDemoNetDriver* DemoDriver = World->DemoNetDriver;
        if (DemoDriver != nullptr && DemoDriver->IsRecording())
        {
            return DemoDriver->SpectatorController;
        }
    }
    return nullptr;
}```

The rpc doesn't seem to get received by it during the recording or during the recording's playback.  Is that the wrong way to use it?  I'm just trying to send an RPC that will only get sent to the demo recording net driver, and then be played back during demo replay

[timid moss]

What if I'm just trying to test the game with my friends? Like I'm not putting it up on steam yet, I just added steam so me and my friends can see eachothers name. Before I added steam I wasa able to run the simple <open 192.168.....> and it worked. Is there something simple like that that can be done with steam ?

@thin stratus

[thin stratus]

No, Steam enforces you to connect via the SteamID. If you have Steam active, you can try to utilize the ServerList (SessionList) by Creating, Finding and Joining Sessions.

Might not always work properly if you have no custom AppID though.

[timid moss]

ok interesting thx. would this all be done in the sessions class?

[thin stratus]

GameSession? You could, but that's only available on the Server if you are ingame

So I would suggest putting it into the GameInstance or a Subsystem of that

[timid moss]

o

Ok thx!

[thin stratus]

#epic-online-services

@timid moss

[fringe dove]

figured out the issue...

void UDemoNetDriver::ProcessRemoteFunction(AActor* Actor, UFunction* Function, void* Parameters, FOutParmRec* OutParms, FFrame* Stack, UObject* SubObject)
{
[...]
    {
        if (IsRecording())
        {
            TUniquePtr<FScopedPacketManager> PacketManager(ConditionallyCreatePacketManager(*Actor->GetLevel()));

            if ((Function->FunctionFlags & FUNC_NetMulticast))
            {
                // Handle role swapping if this is a client-recorded replay.
                FScopedActorRoleSwap RoleSwap(Actor);
            
                InternalProcessRemoteFunction(Actor, SubObject, ClientConnections[0], Function, Parameters, OutParms, Stack, IsServer());

RPC won't go to the demo record spectator unless it is multicast

making it multicast worked (and presumably won't go to other players through the normal net driver, since they don't know about the replay recording spectator?)

[timid moss]

when I am tying to pass parameters intoHServerQuery PingServer( uint32 unIP, uint16 usPort, ISteamMatchmakingPingResponse *pRequestServersResponse ) I am having trouble with figuring out what to pass in for ISteamMatchmakingPingResponse *pRequestServersResponse

[bitter oriole]

The address of a ISteamMatchmakingPingResponse class member would work

[timid moss]

Currenty I have this. ISteamMatchmakingPingResponse* PingResponse; ISteamMatchmakingServers::PingServer(IP, Port, PingResponse); Im sorta confused why it's not working this is my first time trying this

[bitter oriole]

Well, what happens here is that PingServer will probably trigger a process that writes data to the ISteamMatchmakingPingResponse structure at the address in PingResponse

You did not set PingResponse to anything, so it will write to a random address

Likely causing a crash

[timid moss]

this is my upddated code rn ISteamMatchmakingPingResponse* PingResponse = ISteamMatchmakingPingResponse(); ISteamMatchmakingServers::PingServer(IP, Port, PingResponse);

still not working

[bitter oriole]

This won't even compile

[timid moss]

yeah

[bitter oriole]

What you should do is declare a PingResponse variable that survives after the call to PingServer, so probably a class member, and then pass its address to PingServer

And of course learning pointers would help

Though looking at the documentation, it might be even simpler

https://partner.steamgames.com/doc/api/ISteamMatchmakingServers#PingServer

Sounds like just need to inherit ISteamMatchmakingPingResponse, pass this, and add the callback.

[timid moss]

I tried that.ISteamMatchmakingServers::PingServer(IP, Port, this); Neukichen suggested i do that. Still not compiling though

[bitter oriole]

The class needs to inherit ISteamMatchmakingPingResponse.

Or be a ISteamMatchmakingPingResponse though I don't believe that's likely

[timid moss]

I did that alreadyUNinjaGameGI : public UGameInstance, public ISteamMatchmakingPingResponse

[bitter oriole]

Cool, so what's the error now ?

[bitter oriole]

Alright so first, actually compile C++ code to get errors

Build the solution, and read the Output window for errors

Nothing else than the Output window is useful

As to the error itself : PingServer is not a static method - meaning, you have to call it on a ISteamMatchmakingServers object.

Again, inheriting ISteamMatchmakingServers might solve it.

[timid moss]

Okay inheriting from ISteamMatchmakingServers solved the problem thanks for the help!

[ember needle]

all, from the PC I grab the OnPossess event:

I multicast it via the GS:

why does this not get multicasted to all clients? the print happens only on server.

[ember needle]

BTW is it normal that OnPossess is called only on server?

[tranquil yoke]

Hey, i have have this problem, where in one of my projects, My CurrentAcceleration From Character Movement Component is 1500 or something like that, but same things on another project, it is Normalized , i mean it is in the range of 0 to 1

On Server , Local Character :- CharacterMovement->GetCurrentAcceleration = 1500 (In the range of 0 to 1500)
On Client , Remot Character (Copy of server ) :- CharacterMovement->GetCurrentAcceleartion = 1 (In the range of 0 to 1)

I think it is more of multiplayer question.

[ember needle]

Good to know about OnPossess. However, why does the multicast not work?

Ok it looks like the GS doesn't exist yet on clients. By using a rep variable on GS everything works.

[zealous spire]

Hi, I'm trying to implement voice chat in ue4 between Android and Windows. It has to work without internet connexion (all users are on the same LAN, either on ethernet or Wifi, but the internet isn't reachable)
I have been looking fate and wide, but can't find anything that works.

What I've tried:

• Different UE4 versions (4.22, 4.24)
• the Advanced sessions plugin, but I just hit the following error: "LogVoiceEngine: Error: OSS: StartLocalVoiceProcessing(): Device is currently owned by another user" (This is a known UE4 bug since 4.18)
• The couchlearn tutorial (https://couchlearn.com/positional-voice-chat-using-blueprints-in-ue4/), but I also get the error "LogVoiceEngine: Error: OSS: StartLocalVoiceProcessing(): Device is currently owned by another user"
• The marketplace Voice chat system by Ezitna, but it's only advertised to work on windows.

Also, for context, I'm using the OnlineSubsystemNull so that my multiplayer implementation also works without internet connexion.
Any help would really be appreciated !

[tawdry owl]

an someone tell me a nice tutorial for call http services with c++?

*can

[full sapphire]

hello! did anyone experience this with 4.25 landscapes in split-screen? https://www.youtube.com/watch?v=hsYCFmOL88I&feature=youtu.be

this was not a problem in 4.24

[meager spade]

@ember needle

that is in player controller right?

PlayerController can NOT multicast to other players as it does not exist on other players

its Server and Owning client only.

meaning multicast will only work between Server and Owning client

[ember needle]

Hey @meager spade yes, but I was explicitly multicasting from the GameState 🙂

[meager spade]

ah missed that

that multicast will work then

[ember needle]

The issue is that the GameState does not exist yet on clients when the possess happens on server

[meager spade]

thats possible

[ember needle]

so I solved it with a replicated variable on PC

[meager spade]

in normal game (with proper latency)

it might exist

but it also depends when you possess you pawn or how

[ember needle]

indeed 🙂 but not taking that chance. My solution is pretty simple now... the possess happens when the gameplay GM creates the pawn, pretty standard

[meager spade]

i never trust anything to be ready in possessed/beginlay

well you can delay stuff (like we did)

[ember needle]

eheh and you're probably right, I also never do, but I missed that the GM might not be there

Yes, or also use a retriggerable delay on the cast (HORRIBLE)

[meager spade]

i don't use delay nodes, our delays are purely in the game mode

ie we make sure all players are ready connected, map is loaded for every player

before they then possess and drop into play

[ember needle]

I see

[meager spade]

we also have random generated map

[ember needle]

anyway this is pretty clean...

[meager spade]

which is generated on clients using a seed

so server waits till all clients are ready, then it calls beginplay on all actors and sets the game as started 😄

[ember needle]

understood

that probably also takes care of the map being completely loaded before shown... right now i have the typical texture loading while already in game

not sure how to cleanly manage that

will see

[hybrid crown]

Is there anyway (c++) to allow a client to set a (replicated) variable on server without passing by RPC ?
Like for visual thing.

[bitter oriole]

No

RPC is the only communication channel from client to server

[hybrid crown]

Thanks Stranger !

Just for my own knowledge, then, how Movement Component do ? he use RPC too ? i didn't see them in the code.

[bitter oriole]

RPC all the way

[hybrid crown]

Thanks 😉

[zealous spire]

Does anyone here uses the project launcher ? I'd like to launch my project on another windows machine in LAN from the editor

but the device manager does's see the other machine, and if I add it by IP, it says failed

[hybrid crown]

@zealous spire firewall ?

[zealous spire]

none, they're both plugged to a switch

[hybrid crown]

do you check the logs ?

[barren warren]

Has anyone had an issue with PIE where controllers would get duplicated on clients if you're doing server -> server travel to outside of the PIE session?

[jolly siren]

Am I supposed to use the steamworks sdk that matches the one Unreal is using? https://partner.steamgames.com/downloads/list

Or can I use the lastest for the build server?

[bitter oriole]

No need

As far as I know

[jolly siren]

Okay, that's what I thought

I am getting the following on 4.25

May 15 09:09:38 Foo FPSGameServer.sh[19231]: [2020.05.15-16.09.38:566][  0]LogSteamShared: Warning: Steam Dedicated Server API failed to initialize.
May 15 09:09:38 Foo FPSGameServer.sh[19231]: [2020.05.15-16.09.38:566][  0]LogOnline: STEAM: [AppId: 0] Game Server API initialized 0
May 15 09:09:38 Foo FPSGameServer.sh[19231]: [2020.05.15-16.09.38:566][  0]LogOnline: Warning: STEAM: Failed to initialize Steam, this could be due to a Steam server and client running on the same machine. Try running with -NOSTEAM on the cmdline to disable.
May 15 09:09:38 Foo FPSGameServer.sh[19231]: [2020.05.15-16.09.38:566][  0]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
May 15 09:09:38 Foo FPSGameServer.sh[19231]: [2020.05.15-16.09.38:567][  0]LogOnline: Warning: STEAM: Steam API failed to initialize!

I generated the steamclient.so and put in LinuxServer/Binaries/Linux

So this is strange

And I tried generating steamclient.so from both the v147 sdk and the v148a sdk

Both give the same results

[bitter oriole]

I have no experience with Steam dedicated so I'm not sure what to suggest but it's more like Steam failed to start because of a soft error

Maybe the appid file, or something ?

[jolly siren]

This is a normal error that occurs when steamclient.so is missing or is the wrong version. But I have provided it and it is still occurring

[unreal pine]

There's a console command to debug display sever -> client corrections for actors. Anyone remember that command off the top of the dome?

[chrome bay]

p.shownetcorrections 1 IIRC

They're all in the character movement .cpp file

[unreal pine]

Thank you

[ancient root]

Hello has any here managed to get HTTP requests to another API running on gamelift ?

[terse prawn]

This event is tied to "event any damage" any reason this wouldnt execute on clients even though its set to multicast?

[fallen lagoon]

Hi all. I'm new to this chat. I was just wondering if there are any good references or documentation for good dedicated server-based session flow architecture. There's plenty of tutorials out there that will help get a dedicated server spun up and load into a specific level, but I'm looking for something with more specifics on what good lobby flow should look like.

Thanks in advance!

I'm also happy to jump into a voice channel if anyone is available to just have a quick chat about it.

[jolly siren]

@marble depot Did you ever get this resolved?

https://discordapp.com/channels/187217643009212416/221799385611239424/679758917223579799

[marble depot]

yes, I did, although I cannot say with 100% certainty what fixed it. I recompiled my engine, project, updated the SDK and moved to a server running a full and up to date Ubuntu install instead of a CentOS partial image @jolly siren

[foggy idol]

How would I go about with fps spectating and having things like the other players HUD widget show up on the spectator screen ?

[jolly siren]

okay, thank you for the info shootie

[covert gorge]

Hi! i hope someone can help me with one thing. I have sucessfully created a dedicated server build using advanced session (steam). If i execute the .exe directly, it works as expected (i have a custom Appid). But if i upload this server build to a steam dedicated server tool (with a different Appid, but associated to my main game), and execute from steams library, it doesnt work, does anyone knows why?

[karmic jacinth]

Is it doable to make my own CharacterMovementComponent or is it too much hassle? I tried using it on the past and it felt like trying to do anything out of its scope quite painful. There are so much stuff in it that seems pretty useless for most use case.

I'm asking here because the issues I had was mostly linked to the networked aspect of it.

[hoary lark]

if your project has very unique movement, there's a chance you may need to. a good but still fairly simple networked character movement system will likely push at least 5000 lines of code all said and done (Epic's default one is obviously much more than that with all its generic functionality) so expect to set aside a couple months writing and tweaking it if you attempt to pave your own road

[karmic jacinth]

Ok, thanks @hoary lark for the complete answer. I was expecting this kind of answer unfortunately! I will decide later if I want to do the pact with the devil 😈 or do it on my own. 😉

I remember doing a jetpack system a while ago and for some reason it was doing all sorts of desync that I could not figure out (probably messed up the movement prediction) even though I was using the actual movement method to thrust the player upward.

[unreal pine]

Is it cool for me to throw videos in this channel?

[jolly siren]

If they are relevant to the discussion

[unreal pine]

I've been having issues with Client Side Movement Jitter, this was captured from the client instance (the player not jittering is the server)

I tried to reproduce this issue with a new character class using the same model and just a simple run animation - no jitter

[meager spade]

does your mesh Replicate?

your skeletal mesh

[unreal pine]

So I removed the animation BP from my main character class, and just cycled the same animation on it. Still Jittering. I even reverted the networking options on the movement component

[meager spade]

the capsule looks smooth

your animation is jittering

(skeletal mesh)

check your skeletal mesh component

and ensure Replicates is false

[unreal pine]

Checking 🙂

omfg

the amount of times I've posted this question in here

Thanks

[meager spade]

np

😄

[unreal pine]

I'm a dumbass

[meager spade]

nah its a weird bug to find

and ive seen it a few times

[unreal pine]

ok, and I'm still getting these errors when testing locally - Any suggestions on where to look?

it's causing the client to remain stationary on the server while moving on their local instance

[foggy idol]

So can anyone guide me on how to go about with spectating on death

[meager spade]

yeah

so are you trying to use navmovment

[foggy idol]

Like how it works in Apex legends where you can see the players ui

[meager spade]

whilst the autonomous?

ie you set autonomous on an ai pawn?

[unreal pine]

Even with my AI disabled, I'll get these errors

[meager spade]

no

i mean

that only happens

if the CMC cant send to the player controller

or you have packet lag

what is your setup

[unreal pine]

I am using the CMC to move the pawn. As far as I know I'm not using an autonomous proxy

[meager spade]

just normal WASD movement

[unreal pine]

twin stick, but yeah pretty basic

[meager spade]

with the moving pawn possessed by the controller

or is the camera possessed by the controller

[unreal pine]

yes

controller possesses the pawn

[meager spade]

cause in our twin stick game

[unreal pine]

I am using a viewTarget for the camera

[meager spade]

the controller possesses the camera

and we do hackery

plus our pawn is AI pawn

and moves on a navmesh, autonomous, locally

[unreal pine]

that's interesting

[meager spade]

but seems like yours is just standard

well them errors are caused by either packet lag

or the cmc fails to find the player controller

to send the saved moves and ack the saved moves

[unreal pine]

I doubt it's packet lag if I'm running both instances from my local machine

so I'm guessing I'm doing something wrong, like trying to call logic on a controller that doesn't exist

[meager spade]

well

the CMC is failing to route the saved moves

you c++?

i would be checking the ack saved moves in the controller

see if its actually being called

[unreal pine]

I'm using BP for my controller and character atm

[meager spade]

yeah its strange your getting them warnings

i mean i could understand under high ping

[unreal pine]

LogNet: Warning: UNetDriver::ProcessRemoteFunction: No owning connection for actor OneShotCharacter_C_2. Function GetRotationFromController will not be processed.

Wonder if this is related

[terse prawn]

This is executed from 'event any damage'
would there by any reason as to why the clients wouldn't execute this even though its a multicast?

[foggy idol]

Sooooooo......... 😅

[foggy idol]

Anyone have an idea of how I can go about with spectating on death

[ember needle]

when a character dies, you can spectate another player by using set view camera. you can start there. you’ll need to properly manage client huds and ensure that you switch also on the spectated player’s death.

“spectating on death” is rather generic. tps/fps will differ.

[karmic jacinth]

How can I set bReplicates to true (I'm inheriting from UActorComponent) ? I'm upgrading my project from 4.12 to 4.25 and this value is now private.

Oh wait, it's already set to 1!

I've got a question, can anim notify be used for gameplay or is it unreliable to do so?

[edgy sedge]

would be better to use a timer or something, I'm not sure how anim notifys trigger if you're tabbed out

[foggy idol]

@ember needle what I'm trying to achieve is like in Apex legends where you can also see the other players HUD

[spring heath]

Whats the best way to send the clients camera forward vector over network? I have set the camera and the spring arm to replicated, but still cannot see them turning in game. This is a pawn vehicle.

[karmic jacinth]

Is it me or is it much easier to debug networking issues in blueprint compared to cpp? I can actually select which instance I'm going to debug in step by step and I can easily print on screen and it tells me which instance printed what.

To the point where I'd want to just create BP event just to debug 😄

[mild ingot]

Ok, so I found the problem with my game, I just don't know how to fix it. I'm following the UE4 Blueprint Multiplayer tutorial, and for some reason my Join Session node won't join when I try to join as a Guest. Anyone know why?

[thin stratus]

@karmic jacinth https://mobile.twitter.com/joatski/status/1257751888658915328

Michael Noland (@joatski)

Working on a multiplayer game in @UnrealEngine? Add UE4Editor-Engine!GPlayInEditorContextString to the VS watch window to quickly see whether you stopped on the server or a client at a breakpoint during Play in Editor #ue4 #ue4tips

Likes

111

Twitter

Should help at least a bit

[karmic jacinth]

Oh cool!

[mild ingot]

Oh I can check that

[jolly siren]

Anyone that uses linux dedicated servers on 4.25 yet?

[raven moss]

I know Kung Fu!

I made it to lecture 41 of the UE4 MP series on Udemy and now I can connect two computers on multiplayer!

I recommend this to anyone working with UE4 multiplayer or not - https://www.udemy.com/course/unrealengine-cpp/

It thoroughly explains the PlayerController, GameMode, GameState, Projectiles, Replication. Every serious thing you need to know about.

[foggy idol]

Tbh after I learnt some stuff I've derialed 😂😂

Tho I do plan to finish it

[meager spade]

good ol Tom Looman course

[mild ingot]

Is it any better than the free tutorial series given by the official UE4 channel?

[meager spade]

i should really speak to him about doing a course

On the Gameplay Ability System plugin, but proper networking

[cyan current]

Tom Looman my boi

[mild ingot]

Can someone please help me find out what the problem with my Join Sessions node is?

[spark fossil]

@unreal pine I was having the same error message (Hit limit of 96 moves..) and getting laggy movement after upgrading from 4.23 to 4.24/4.25. Are you using GAS?

[raven moss]

When I set max players to 3 and hit play I can only see two being replicated. Has anyone run into this?

The 3rd player can't see the other two

Player 1 and 2 see each other move and see all 3, but player 3 doesn't move.

I have three player starts

Even start players 4, I only see 2 replicated players on the first two clients

[dull island]

has anyone run into a problem with PawnPrivate being null in multiplayer on clients?

player states are supposed to have the currently controlled pawn replicated to them, so the player state can access the current pawn (because they don't have controllers)

but at least for PIE, it seems like PawnPrivate is always null

and putting breakpoints on APawn::SetPlayerState never fires (it might be optimized away, even in DebugGame)

like when I log from blueprints, this is what I get

LogBlueprintUserMessages: [C_SuperServiceRobot_C_0] Server: C_SuperServiceRobot has PS_SuperServiceRobot
LogBlueprintUserMessages: [C_SuperServiceRobot_C_1] Server: C_SuperServiceRobot1 has PS_SuperServiceRobot1
LogBlueprintUserMessages: [PS_SuperServiceRobot_C_0] Client 1: PS_SuperServiceRobot has 
LogBlueprintUserMessages: [PS_SuperServiceRobot_C_1] Client 1: PS_SuperServiceRobot1 has 
LogBlueprintUserMessages: [C_SuperServiceRobot_C_1] Client 1: C_SuperServiceRobot1 has PS_SuperServiceRobot
LogBlueprintUserMessages: [C_SuperServiceRobot_C_0] Client 1: C_SuperServiceRobot has PS_SuperServiceRobot1
LogBlueprintUserMessages: [PS_SuperServiceRobot_C_0] Server: PS_SuperServiceRobot has C_SuperServiceRobot
LogBlueprintUserMessages: [PS_SuperServiceRobot_C_1] Server: PS_SuperServiceRobot1 has C_SuperServiceRobot1

huh so weird

even OnRep_PlayerState doesn't get called

neverrrrmind

i was looking at the wrong base class

😛

[ember needle]

is there a solution for networked ragdolls, by which I mean the ability to recover from a ragdoll in a way that works in multiplayer? Since the mesh gets detached from the capsule while physics is applied, the position of the ragdoll may considerably vary in a MP environment

[chrome bay]

Well you have two options really. Either clamp the ragdolls XY position so that it stays relatively close to the capsule, or try to move the capsule to the ragdolls position when they recover.

[ember needle]

clamping would allow to stay in the same position... but moving the capsule would not, as the position would differ

All my tries of physical constraints though have been a disaster. I'm basically trying to make a "revive from friends" mechanism when someone is hit on the ground

[buoyant wedge]

Hello guys

How can visualize a widget on all player (server client) after post login and remove them on the single user after he have select the class on wg?

[jovial cipher]

does steam allow people on different branches to see the games in a server brower?

[random nymph]

Is there any good way to prevent cheating when using client rpc's?

I'm thinking about situation where the server tells client to increase a user's steam stat

[buoyant wedge]

why i cant switch the get default pawn class for controller with the restart player?

[jolly siren]

@random nymph Why would the client update their own steam stats?

[random nymph]

Then the server wouldn't need connection to steam

[unreal pine]

@spark fossil I'm not using GAS - been swatting away warnings and the occasional access nones, but this issue is currently the bane of my existence. Causing random teleporting and in most cases the client isn't moving, but appears to be on their screen.

[spark fossil]

@unreal pine Which engine version?

[unreal pine]

I'm on 4.23

[spark fossil]

Ah. I only started having those issues 4.24 onwards

[unreal pine]

Part of me was like "Maybe if I upgrade my engine, the bug will go away" but some of my plugins aren't supported on 4.25 yet

sounds like that's not the case based on your experience anyway

[spark fossil]

4.24+ seems to be a nightmare for network performance. For my project anyways

what are your network settings for the CMC?

update rate etc.

[unreal pine]

I actually just reverted 'em back to default to test if that might be the issue

[spark fossil]

What do have marked as replicated?

in your character

[unreal pine]

Component-wise?

[spark fossil]

yeah

[unreal pine]

I have a couple components set to replicate (like a hitbox for damage)

But I'll turn off replicating and see if the server handles it properly without

[spark fossil]

try having only the top level bp replicating

[unreal pine]

some of this stuff I set up before I knew anything about networking so I was like "yep, you'll need to see that component on the other machine"

haha

[spark fossil]

I did exactly the same 🙂

[unreal pine]

KaosSpectrum helped me fix my character's jitter cause I was replicating the skelmesh

[spark fossil]

I think I did that too originally

try setting always relevant to true also if it's not already

on the top level character

and replicate movement=true. All the components replicated = false.

[jolly siren]

Is this only true for shipping builds?

And is it only required for windows dedicated servers that are shipped through steam?

[raven moss]

Is there a setting for max players allowed for networking?

Is the default 2?

If I just do the 3rd person template and connect that with multiplayer, I can only see a max of two players replicating.

[buoyant wedge]

No

You can have more player. In the editor you can try to set 3 or 4 and see if work.

[raven moss]

That works in PIE

[barren warren]

I believe the default for clients connected to a server is 16 - you need to change some settings in your gameini to increase it over that value

[raven moss]

Cool okay I packaged a build and I did see 3 instances connect across two computers

For one computer I do the:
open levelname?listen for the server

The other two connect via IP:
open IPADRESS

Both in the developer console

[twin juniper]

I am wondering if almost no one is familiar with Aws Gamelift, how people then realize multiple servers for a multiplayer game

How they do it?

Like for example an fortnite in a very small size, they have for each running game an own server

[stoic acorn]

how do you have it that your New Editor windows keep their screen positions between each play?

[stoic acorn]

how do you get a variable in the gamemode BP from an actor placed in the level?

[marble gazelle]

You mean how an actor can access an value of the gamemode?

I think there should be some sort of GetGamemode node or smth. BUT this is just not null on the server, on the clients there is no gamemode

There you could use the gamestate for example

[stoic acorn]

ah no I meant the other way around. I'm trying to trigger a player walking into a volume, and an effect to be controlled by the server to each client

[marble gazelle]

Ah

Well a gamemode is share between different levels so you can't just reference a specific actor, if this actor doesn't register itself at the gamemode.
Like in BeginPlay the actor could tell the GameMode "hey, its me"

But if you just want to do smth in a volume, you don't need the gamemode for it, just check if your actor has Authority (there is a IsServer node) and then do smth. You also could just load this actor on the server.

[stoic acorn]

ah. I was doing switch has authority, but every client was giving a positive on the server

[marble gazelle]

? well the server has auth on most entities

[lost inlet]

@jolly siren those defines are for any packaged build

regardless of configuration (development, test or shipping)

[jolly siren]

And they are required? I see shootergame doesn't use them.

[lost inlet]

kinda if you want to use the spacewar app ID or whatever it defaults to

[jolly siren]

I'm having an issue where my linux dedicated servers won't initialize steam

[lost inlet]

that's probably a different issue, i would make sure the steam libraries are included in the correct directory (like libsteam_api.so, etc)

[jolly siren]

I regenerated steamclient.so and placed it in the correct location and it didn't help

[lost inlet]

steamclient.so is the client library

libsteam_api.so is what the server uses

[jolly siren]

Really? I've always used steamclient.so

https://allarsblog.com/2016/02/26/basicsteamintegration/

[lost inlet]

outdated information, plus this is how it's always been pretty much

[jolly siren]

libsteam_api.so is under Engine\Binaries\ThirdParty\Steamworks\Steamv147\x86_64-unknown-linux-gnu

According to the logs I pasted, it is loading steamclient.so

So I don't think it is outdated

I used this method from 4.2 - 4.19 without any issues

[lost inlet]

do you use the dedicated server redist on your server app ID?

[jolly siren]

Do you mean do I have a steam dedicated server app for the dedicated server?

[lost inlet]

i got the so's the wrong way round so steamclient.so is correct

but in your app for your server, you can add redists

and they add the steam SDK redist to the root directory of where the server is installed

might also help to state which version the engine you're on

[jolly siren]

I'm on 4.25

[lost inlet]

isn't steamworks busted in the 4.25.0 release?

i would strongly recommend not upgrading until at least hotfix 1

[jolly siren]

I know it is in the editor

I didn't think it was beyond that

https://issues.unrealengine.com/issue/UE-92985

[lost inlet]

also it might fail to initialize with an AppId of 0, not sure

is there a steam_appid.txt alongside the executable?

[jolly siren]

I'm giving it an app id via SteamDevAppId

But it spits out that it is 0 in the logs

[S_API] SteamAPI_Init(): Loaded local 'steamclient.so' OK.
[2020.05.15-20.50.59:064][  0]LogSteamShared: Warning: Steam Dedicated Server API failed to initialize.
[2020.05.15-20.50.59:064][  0]LogOnline: STEAM: [AppId: 0] Game Server API initialized 0
[2020.05.15-20.50.59:064][  0]LogOnline: Warning: STEAM: Failed to initialize Steam, this could be due to a Steam server and client running on the same machine. Try running with -NOSTEAM on the cmdline to disable.
[2020.05.15-20.50.59:064][  0]LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()
[2020.05.15-20.50.59:065][  0]LogOnline: Warning: STEAM: Steam API failed to initialize!

[lost inlet]

ah that's 0 because it can't access SteamGameServerUtils()->GetAppID()

since it failed to init

[jolly siren]

okay, that makes sense

I'm using the app id of the game package, which I always have. Not a separate tool package for the dedicated server.

[lost inlet]

the app ID should be the client app ID

so it won't be that

[jolly siren]

okay thought so

This is a project upgraded from 4.19

[lost inlet]

that's a lot of versions to skip

[jolly siren]

yeah I know

[lost inlet]

are you a licensee?

[jolly siren]

yeah

[lost inlet]

might be worth posting on UDN then rather than wasting more time on it

if it's loading steamclient.so but failing to initialize, that's probably something you don't want to waste too much time on

[jolly siren]

Right, yeah agreed

[twin juniper]

I am wondering if almost no one is familiar with Aws Gamelift, how people then realize multiple servers for a multiplayer game
How they do it?
Like for example an fortnite in a very small size, they have for each running game an own server

[lost inlet]

i'm not sure what you mean, they have APIs for allocating servers and that sort of thing

and they're backed by EC2 instances

pretty expensive way of hosting your game btw

[barren warren]

Does anyone know of a good chat solution for a cross server text chat system - looked into Vevox but their support and documentation is pretty terrible.

[lost inlet]

vivox is pretty much the industry standard at this point though

[fossil spoke]

Yep, its not that difficult to implement, but their docs are pretty rubbish.

[lost inlet]

maybe one of the many BaaS platforms may have this but i haven't found many viable alternatives to vivox

[fleet raven]

they don't have a self host option so that's already egg

[lost inlet]

that depends if that's in your requirements or not

because maybe you don't want to self-host

[fleet raven]

there is no reason for them to offer reliable service for free and it might stop working at any time

[lost inlet]

it's premium

only the development sandbox is the free part

[fleet raven]

is it though

[lost inlet]

if it's text chat you're after you can always do what epic did and roll your own XMPP server

[fleet raven]

they have a free plan for up to 5000 users and then a crazy expensive "enterprise" plan

[lost inlet]

it's not crazy expensive but it is expensive

audiokinetic has a rival product but it's not as feature complete

[twin juniper]

Hello guys, I made a post in animation section but I think most of you can help me in this section (its about replication) :

Here is my post https://discordapp.com/channels/187217643009212416/221798806713401345/711333206510796863

thank you verry much ❤️

[twin juniper]

To deal with replication in AB, I tried to replicate them manually directly from the player blueprint (what I learned from internet and forums) and use the replicated variables with a cast in animation blueprint. But the thing is, as soon as the client has lag, it will delay the information to update and inevitably break the animation blueprint output.

If I'v a variable let say "isDoubleJump". And lets say I do a NET PktLag=300 for exemple. OBVIOUSLY my client will recieve the "IsDoubleJump" with some delay, while he will jump instantly. He would never see the animation transition that is using this variable.

So my question is how do you predict the information ?

I hope my question is understandable, I'm not asking for a tutorial, you can redirect me to any documentation, I'm self learning, but its a hard topic to find on internet. All the things I found were about simple RPC call

[meager spade]

prediction is hard without c++

you would have to modify the CMC and pass double jump as a saved move

or you have the local client set doublejump and then tell the server to set double jump.

all input should be client lead

[sharp pilot]

Hi, I want to know if there is a simple tutorial to understand to make a dedicated server or some other alternative to make an online system without a person being the host

[queen flower]

specifically, I would like this also, to explain the changes for 4.25. Used to have a checkbox for running a dedicated server.

[twin juniper]

@meager spade Thank you for this fast answer, there is any documentations where I can get all the basics CMC replicated variables ?

Because I dont understand why Devs would replicate Roll and Pitch vars but not Yaw 😐 And maybe get into this code and try to implement the "double jump" as you said

[terse prawn]

I've been looking everywhere for tutorials and guides to making multiplayer spawn system for teams and I am just baffled.
can anyone help point me in the right direction for team spawn points? or a team system in general?

[meager spade]

yaw is replicated

via ControlRotation

ControlRotation is replicated, well at least i thought it is

i have not had to replicate anything to get yaw in my animp

animbp

[twin juniper]

With this setup, server always return 0, maybe I'm doing it the wrong way 🧐

(for Yaw at least, others are working (and its working on the client side))

[meager spade]

hmm

let me see my code

[twin juniper]

❤️

(btw i'm using this to make offset with a blendspace)

[meager spade]

for what purpose?

aiming?

[cyan current]

You can also do this for aimoffsets in multiplayer

[twin juniper]

No, moving the head

[meager spade]

yeah normally done with aimoffsets

even for the head

https://www.thegames.dev/snaps/UE4Editor_xtk7Ll39FK.png

AmingAngle is Vector2D

[twin juniper]

I'll check this

[meager spade]

i have TIP

so i do a bit more math to get a yaw offset

https://www.thegames.dev/snaps/fdeGOK5nXK.mp4

TIP is WIP 😄

[cyan current]

looks nice 😄

[meager spade]

need to do more blending with curves