multiplayer

[chilly mason]

not sure I follow

if I need 4 clients I just run a client test .bat file 4 times

(by "clients" I mean processes since I don't really have clients per se)

[silent valley]

your C# class LargeFleetTest sets up the ClientRole / Config for how to run your game build and then Gauntlet spawns the Horu.exe then when the exe exits Gauntlet collects the results

but how does the game instance actually know it is supposed to be running a test?

sorry I know I'm not explaining this well!

like, running this spawns an instance of my game via Gauntlet, but it just sits there not doing anything until I exit
RunUAT.bat RunUnreal -project="MyProject.uproject" -build=local -test=DefaultTest -numclients=1

[chilly mason]

I mean you have a gauntlet controller and you set which gauntlet ctrl you want via your automation.cs

if that's what you're asking

[silent valley]

ah... I see

[chilly mason]

hmh did you go through my gauntlet tutorial?

[silent valley]

yes.. but I can't use source build so I get stuck at the bit where I need to create a custom C# class

[chilly mason]

I was actually going to ask how you've managed to use gauntlet in a launcher build

[silent valley]

there's a built in DefaultClass which almost works

it spawns game instances, passes cmd line through etc

but I cannot specify a custom controller

[chilly mason]

what ctrl is it trying to use

[silent valley]

it doesn't set one, so whatever the default is

[chilly mason]

where's this class

[silent valley]

Engine\Source\Programs\AutomationTool\Gauntlet\Unreal\Game\UE4Game.DefaultNode.cs

[chilly orchid]

Yo just curious do any of you guys know any services that I can host a dedicated server on I’ve tried listen servers and steam and for whatever reason clients can’t connect to each other via steam and it makes it hard for me to develop and fix bugs in my game any suggestions?

[silent valley]

AWS works ok, but any cloud host should be fine

[chilly mason]

as far as I can tell you're out of luck since ugauntlettestcontroller leaves its virtual void OnInit() {} empty

so you can't tell the base class what to do since you can't override its oninit

defaultnode.cs must be spawning this ctrl since I can't find anything else

[silent valley]

ah you've led me onto somethjing here...
This is from the top of GauntletTestController.h

 *    Base class for games to implement test controllers that use the Gauntlet native
 *    framework. This is a very thin class that is created automatically based on 
 *    command line params (-gauntlet=MyControllerName) and provides easily overridden
 *    functions that represent state changes and ticking

so maybe I can override the controller via cmd line

[chilly mason]

yeah but the key there is overriden

well yes, but the engine won't find your ctrl class unless it's in the engine :)

unless you maybe symlink it or something...

you could try that

iirc that's the reason you need engine source

[silent valley]

the C++ side is fine - it's the C# bit you need the engine source for I think

[chilly mason]

try it, let me know if it works

[silent valley]

I will, thanks for your help 🙂

I was about to go to bed but now I need to know 😂

[chilly mason]

hehe

[silent valley]

sweet - it totally works 🙂

well launching my game with -gauntlet=MyController argument works... not sure how to make Gauntlet actually pass that through though...

one step forward anyway

only 99 more to go

[cosmic trail]

Do games with dedicated servers get away with not ticking or refreshing anim bones on dedicated server? I'm finding that this is hard to do, since anim bone data sometimes used for positional stuff, ie where bullets fire from

[vivid seal]

for fastarray replication, if i change two properties of one of the item structs, will both properties guaranteed be changed when PostReplicatedChange fires on the client? or does it fire per property?

i assume it just fires after the whole struct is updated because that makes sense in my head but i wanted to double check, its been a while since i worked on my game

[hollow eagle]

Riot games has an article partially about this for valorant, actually. They do run animation fully on the dedicated server (since it's required for accurate hit detection), but they turn it off at specific points during the game when it doesn't matter (before/after rounds).
Doesn't help with a single instance, but it does help in their case where they run multiple instances per server (so amortized performance cost is way better, even if it doesn't help in a single game)
There are some details here: https://technology.riotgames.com/news/valorants-128-tick-servers

[cosmic trail]

Thanks siliex, yeah, hoping to do multiple instance servers..just scared of the costs

[hollow eagle]

Definitely take a look at what they've done then. Valorant is a good example of scaling with a game that has very high server performance requirements.

[cosmic trail]

yea looks like a great article, man 128 tick is fasttt

[hollow eagle]

iirc one thing to note is that they avoid using replicated variables because they're more expensive than manually calling an RPC (the engine has to scan for changes to replicated variables, which gets expensive in a game running that fast)... except when they built valorant the newer push model for replicated variables didn't exist, so using RPCs for everything isn't really necessary anymore.

[cosmic trail]

ah, I didn't even realize valorant was built off unreal

[fossil spoke]

Yeah use Push Model if you can.

The great thing about Push Model is its completely opt in.

You can convert to Push Model over time as well.

One property at a time lol

If you want

[meager spade]

@cosmic trail fortnite on the other hand run no animations on the server

and get hit data for weapons from client

and server does some verifications

[chrome bay]

Some interesting choices in there. Particularly using RPC's instead of properties for state replication.

[hollow eagle]

Something they only had to do because push model didn't exist at the time 😛

[chrome bay]

I'd rather invent it I think 😄

But, I guess since they have an incredibly tight set of rules and handling of players for the game, it's easier for them to handle edge cases

[cosmic trail]

is push model need 4.25?

[hollow eagle]

I think that's when it was added, yeah

[cosmic trail]

ah shoot ok, I will have to update, it's a further upgrade to using the replication graph that fortnite was using?

[chrome bay]

Also lol:
ShooterGameServer

[hollow eagle]

they're distinct things, you can use both

[chrome bay]

Telling yah, every UE4 FPS is powered by that template

[hollow eagle]

pretty sure valorant's client executable is ShooterGame.exe or something

they never renamed the project lol

[chrome bay]

Haha even we renamed ours 😄

[cosmic trail]

lol

[chrome bay]

Always funny to see though

[cosmic trail]

That article was nice, even talked about cores and caching, which seemed to affect performance a ton

[hollow eagle]

yeah, it's a great article. Though you don't need to pay attention to everything because most games aren't running 128 tick at that scale

[chrome bay]

It's an interesting glimpse into their approach, though I don't think their solutions are widely applicable

But if you're building something with a very well-defined loop like that game has, it's probably ok

[cosmic trail]

@meager spade because most things are behavior driven in my game(RTS), and behaviors actually only run on the server, don't think I'll be able to take the same approach as fortnite

[chrome bay]

Once you scale up to RTS/Fortnite numbers you've got to strip back everything you can. Running animations server-side is a fruitless effort at that stage

[pallid mesa]

tell me... I'm digging to find a pair-to-pair update frequency solution

without doing weird stuff

it's just intuitive, but not there

[cosmic trail]

@chrome bay Ok, there's probably stuff I can do, like have the client take ownership of where a particle spawns instead of the server to eliminate animations, and making line of sight not use animation data

[pallid mesa]

LOS relevancy? not a good idea, you'll have pop-in

unless it's pretty scoped

[cosmic trail]

sounds like in the end we shouldn't do server animations as much as possible, and any trade off would be worth.

[pallid mesa]

for a rts? you should absolutely not!

[cosmic trail]

@pallid mesa Since it's an RTS I can force things, LOS is mostly used for target acquisition and whether or not they can be fired upon from cover

must not server animate right?

[pallid mesa]

problem with LOS net-update is latency

other than that, great solution, no doubt.

[chrome bay]

Yeah LOS isn't worth it IMO, causes more problems than it solves.

Plus since LOS changes so often, it can end up costing more as you open/close actor channels more frequently

[pallid mesa]

I do use precomputed visbility net culling for my racing game, but it's very contextual

[chrome bay]

Using stuff like replication graph is where you'll start to claw back server CPU time

Combine with the newer push-model stuff (which could be better but it's a start), and you're away

[cosmic trail]

yeah I've enabled that, helped a bit(rep graph). My LOS has been modified a lot to be pretty loose

[pallid mesa]

one thing that possibly might work if you do want LOS culling is leaving some room outside the LOS area where pawns are still relevant

like a grid

but still... if you can move the camera fast... not a very good idea

[cosmic trail]

ah are you talking about a fog of war line of sight? I'm talking about shooting line of sight sorry

[pallid mesa]

oh I thought you were speaking about the literal frustrum

my bad then, you might need to explain what shooting means in your context

[cosmic trail]

My fog of war line of sight is grid based, well the RTS LOS would be about what units you have out there able to see what other units

[chrome bay]

For shooting LOS it's really not worth it

[pallid mesa]

^

[chrome bay]

You should profile it ofc, but 8/10 times, we found it increased bandwidth not decreased

That's in the context of an FPS

[pallid mesa]

it actually ships with shootergame!

pause net relevancy I believe is called

[chrome bay]

Yeah

[pallid mesa]

Actually James, do you know if there is any way to do pair-to-pair net update frequency adjustments?

[chrome bay]

Not sure what you mean by that?

[pallid mesa]

the same way that IsNetRelevantFor exists where you can adjust relevancy between a pair of actors

[chrome bay]

Oh I see, no there's no way to do with with frequency

[pallid mesa]

I would like to adjust the netupdatefrequency between a pair of actors

[chrome bay]

But also if you're using replication graph, frequency can't be changed at runtime anyway

[pallid mesa]

oh no!

bad news for me then :(

[chrome bay]

with the "standard" net driver you can just have a manager object that sets frequencies arbitrarily

But to be honest aside from pawns and vehicles, all the actors in our game have an update frequency of 1hz

And we just call ForceNetUpdate() when we change properties

[pallid mesa]

this is for vehicles

I would like distant ones from the viewer to run at a reduced frequency

while I keep them relevant

[chrome bay]

Oh well rep graph will sort of do that anyway

If you're starting to saturate, actors that are closer will have higher starvation priority

[pallid mesa]

will take a look! thanks!

[cosmic trail]

@chrome bay So the way the cover system works is there are 4 shooting spots(lean left, right, pop up, straight). Before a weapon burst, just ray cast to see which ones can hit the target, then play the appropriate lean/pop out anims to shoot. Not using it every repeated fire, just the first part of a weapon burst. I'm not going to calculate shooting LOS for each actual tracer/bullet. So it comes down to 4 ray casts to determine if the target is still valid for this burst, I can replicate that the burst can proceed, and do the projectile start on the client(for it to spawn on the gun muzzle), with the projectile end being replicated down. That's kind of the idea right now, don't think that's too intensive?

[chrome bay]

I would test it in a "real world" environment with the right number of players and some variable packet loss/latency between them

The real issue is with pop-in

But also, in something like an FPS, if a player is occluded they might still be relevant to the player, e.g. footstep sounds, interacting with something else etc.

[cosmic trail]

maybe some way to interpolate it more client side during the initial life of the projectile while lerping it more server after?

[chrome bay]

It becomes a bit of a minefield

I haven't been following along tbh so it's hard to say

[cosmic trail]

oh ok no I think u mean pop in fog of war?

[chrome bay]

Oh well in a fog of war scenario it probably makes sense yeah

[cosmic trail]

I've got that part solved with a grid based system, not actual Los to collision boxes for that

[chrome bay]

It's also a good anti-cheat, in that if an object concealed by fog-of-war isn't being replicated to a client, then they can't use a client-side hack that reveals it

But yeah in a fog-of-war like setting, then network culling does make some sense

But obviously you'll want some buffer room to allow for latency and avoid things popping in too late.

[cosmic trail]

Yeah, can't quite make it anti map hack proof but it'll be better than replicating everything performance wise or hack wise

[pallid mesa]

yeap for fow is a great idea

for frustrum view not so great, but yeah the buffering is relevant

[chrome bay]

yeah I was thinking in context of a frustrum/FPS game or something

[pallid mesa]

now the LOS issue with the traces - I didnt really understand it, what do you want to do exactly?

[cosmic trail]

ah it's like in company of heroes, you can take cover. But they don't actually calculate LOS for if they can hit the enemy. I am because if I don't, sometimes they will shoot through walls, I have to make sure they shoot from the correct side of a wall(left side or right side) if they're behind a wall

Think of it like a cover based FPS game, where ur moving ur infantry from cover to cover, but it's an RTS and you're controlling these units and which cover point they move to

[pallid mesa]

mhm... okay

[cosmic trail]

so right now I have the animation determine where to shoot from, so it syncs up, but I think I'm going to make it just fixed points relative to the cover normal direction

that way I don't have to calculate animations

but I still have to lerp the client side projectile spawn on the gun muzzle with the target end point, instead of a server side projectile spawn location(which will not look visually correct since I won't be calculating animation)

[pallid mesa]

well

yeah all of that can run solely in the client

the server doesnt have to simulate the projectile

[cosmic trail]

some projectiles are actual balls u can avoid though 😄

it's just the spawn point won't be good if server spawns it not on the gun's muzzle

[pallid mesa]

yeah, yes

but that's just an offset

a location

[cosmic trail]

yeah, so will probably just spawn it on client initially and then let replication do its thing after

[pallid mesa]

oh I see what you are saying

hahaha yeah... well this is a tricky one

so you can have the projectiles spawn somewhere not depending on the weapon anim, but have the visuals in the client to convey

[cosmic trail]

yeah, has to be a lerp while it's not fully synced

but I can manage that, vs. what you guys are saying it's not a good idea to run anims on the server at scale

[pallid mesa]

yes the visuals will need to lerp wherever the real projectile is at

its tricky, however, it's been done before

overwatch and (iirc) UT among others

however context is different

(prediction!)

[cosmic trail]

ah I see, yeah

thanks for all your inputs, learned a lot more about the networking stuff today

[humble crow]

Hey all. Was trying to figure something out. So I have a character class and I want only the server to execute some function that takes the characters current position as a parameter when that property is replicated. How do I go about doing that?

Right now, I'm trying to call that function in an override GetLifeTimeReplicatedProps() for the character class. Is that the right place to do so?

[fossil spoke]

Replicated properties can define an "OnRep" function to be called when their value changes.

It can be declared as such

UPROPERTY(ReplicatedUsing = "OnRep_MyReplicatedFloat")
float MyReplicatedFloat;

UFUNCTION()
void OnRep_MyReplicatedFloat();

When the value of MyReplicatedFloat changes, the OnRep_MyReplicatedFloat() function will be called on Clients automatically for you.

GetLifetimeReplicatedProps() is not meant to contain code other than DOREPLIFETIME() macros

[humble crow]

Ahh ok. Thanks!! That makes sense! Didn't realize its just for DOREPLIFETIME() macros.

how would I designate a Replicated property if its an inherited value though? Like in my case I want to do it when the character has moved.

[fossil spoke]

Location (especially for Characters) is updated pretty much every frame, so you can assume whatever value you get on any given frame is the most up to date.

There are functions for this however.

AActor::PostNetReceiveLocationAndRotation()

AActor::PostNetReceiveVelocity(const FVector& NewVelocity)

These can be overridden

They are called when their values change.

They are only called on the Client though.

[humble crow]

Ok perfect! I think I figured out what I can do now. Thanks so much!

[fossil spoke]

👍

[humble crow]

Could I call a override client function like AActor::PostNetReceiveLocationAndRotation() that calls a server RPC to make the server execute the function it needs to?

[fossil spoke]

You dont call PostNetReceiveLocationAndRotation yourself, its called by the Engine.

You can do whatever you like.

If you want to call an RPC inside that function sure, go for it.

But keep in mind, that function maybe called every frame, you may not want to call the RPC every frame.

[humble crow]

Makes sense. Thanks.

Had another question..so I have a UGameInstanceSubsystem that loads a resource during initialization. Is it possible to have a subsystem that only initializes on the server? Only the server will need the resource

[lost inlet]

has anyone been experimenting with the network prediction plugin? if so, how are you finding it?

[chilly orchid]

How would i setup the C++ EOS Free Plugin i have the steps and the documentation but it seems like the C++ classes are not getting recognized even after succesfully renaming them

and if i do have to pay for it to get it working are there any other free solutions for hosting my game online for players around the world to join for testing reasons only i find it pretty hard to fix the replication issues when i only have one desktop to test on

[lost inlet]

EOS doesn't give you servers, you can have p2p connections but that's it

also since this is a third party plugin you would have to reach out to the author

[chilly orchid]

ok that leads to my second question is there any other services aka online subsystems out there other than steam that people can join each other with to test

[lost inlet]

with OnlineSubsystemNull you can just use direct IP connection anyway

[chilly orchid]

because atm with steam you cant even find valid sessions half the time due to the fact that spacewar steam id is region locked from what i heard

[summer tide]

Anybody knows how to create multiplayer swimming?

[kindred widget]

@summer tide It should pretty much work the same way as walking?

[clever plinth]

Oh yeah, what really is the NULL OSS? I know it has basic support for local matchmaking, but I'm not really sure what else and why

[lost inlet]

it doesn't do matchmaking

[summer tide]

@kindred widget I did it this way. It works but when multiplayer are swimming the water volume leaves the other players. https://gyazo.com/d849c91a44a5836baaedb402ffcfd918

[lost inlet]

it's not an online service, thus "NULL"

[clever plinth]

Oh, that was a misunderstanding then

[kindred widget]

@summer tide What I mean is, is that the movement modes and animations should all switch per instance, per machine without any extra networking. A client runs off a cliff, they fall into a water volume. This happens a little slower on client2 due to lag. Client 1 hits water, starts playing swimming animation locally and switches it's movement mode to swimming. Client2 sees client1's character hit water, client2 starts playing swimming animations for client1's character locally based on locally attained values and switches it's movement mode locally in that character's local CMC. This should all be driven off of the CMC's movement mode rather than overlaps. It's designed to recognize the character being in a physics volume meant for water and switch to swimming when it's deep enough in that voume.

[summer tide]

@kindred widget Sorry I forgot to mention that I don't want to place physics volume in my level, since I've river and ocean. That's why I was using char movement's physics volume.

[kindred widget]

You could likely set the river spline up to attach physics volumes to it, the ocean could be blocked out easily. But beyond that you'd just do it the same way. Each client just simulates where the character is on their own. At most you might create a replicated enum for SkipOwner and force other clients other than the owner to set the character's movement as that when it replicates and replicate it when the server changes, but that could also get messy since CMC is supposed to largely simulate locally. So if Client1 moves into something and triggers it's overlap, it should end up doing the exact same thing on client2 just with a slight lag.

IMO, it sounds more like a level design consideration more than a gameplay programming one. Since the work for swimming is already done, seems odd to override it when the tools are already there.

[cold chasm]

anyone know why my players are teleported when the game feels like it? sometimes they teleport sometimes they do not and im unsure why lol

it never tells me the cast failed so im assuming it doesnt fail it also doesnt return true or false or teleport the player either so im a bit stumped as to why when a player doesnt teleport it doesnt say anything and just removes the widget

[kindred widget]

@cold chasm Is this for letting a client click a button to teleport their character?

[cold chasm]

yeah, it works a majority of the time but other times not

all standalone connecting to the host

[kindred widget]

Kind of an odd way to go about it. Why not just get the local character, and call the RPC on that? You don't need the inputs for the RPC either, since that information is easily available on the server from the same character via self and GetController->CastToPlayerController

[winged badger]

PlayerArray has no guarantee of order whatsoever

its not replicated, so PlayerStates will be in order in which PlayerState Actors replicated to client

[cold chasm]

idk this is my first multiplayer project and so its all really new to me xD

but ill take a look thanks 🙂

[kindred widget]

@cold chasm Try something more like this.

[cold chasm]

ok will do thanks ^_^

@kindred widget thanks 🙂 worked like a charm ^^

[summer tide]

How can I replicate this jump? https://gyazo.com/890163ecb854faed5a048cca480e71f0

[kind ember]

Is there function to kick player via UniqueNetId during AGameMode::PreLoggin? The KickPlayer function in GameSession requires APlayerController.

[kind ember]

Make a reliable server RPC if you need jum z vel to change, and Jump can be call normally without Server RPC

[summer tide]

THis is in my horse BP which is controlled by the player. So I do server event from player to riding component. From riding comp use an interface to horse BP.

If I add that piece of code to a server event., Server sees the horse jump but client doesn't

[kind ember]

Jumping is already replicated, check if replicates movement is set on horse, also set ownership,

[summer tide]

well the horse jumps and everybody sees the horse jump but the clients don't see the anims

[kind ember]

Anims StateMachine can use replicated variable to appear on client, or in this case you can use isFalling to drive the anim, is the jump anim montage or state machine?

[kindred widget]

Out of curiosity, why aren't you just possessing the horse for the player, and attaching their normal pawn to the horse, and then repossessing the normal pawn when leaving the horse?

This would allow you to call server RPCs and use input directly in the horse without any extra complexity from rerouting the input from their character to the horse.

[summer tide]

I fixed it. It was working before. Thanks to git.

[rose egret]

if I place a replicated BP Actor in the level and set its bNetLoadOnClient to false. when the actor becomes relevant it will be spawned for the client yea ?
and the default CDO will be the one placed on level not the BP yea ? I mean location should not be replicated right ?

I feel some lag since I changed my door, lootbox, .. to bNetLoadOnClient false

[winged badger]

location will match as instructions to spawn an actor include a transform

and it will be of the same class as the actor on the server, and definitely won't be the CDO

[rose egret]

so it wont be like normal ->SpawnActor ?

if properties are equal with the one I placed in level they wont replicate ?

[winged badger]

it will be, but all replicated members will be set before BeginPlay

to match the servers

[rose egret]

damn that sucks, its statically placed why it should replicate transform and lots of other properties

[chrome bay]

Because it's a new actor

[winged badger]

there is no benefit to replicated and NetLoadOnClient being false

quite the opposite, if you leave its relevancy and return it will be spawned anew

[obtuse moon]

Hi! Dynamic material instances are local, right? Should I be creating them on the clients for every material that needs it?

[chrome bay]

They are local only yeah

[obtuse moon]

Thanks! So it is confirmed

lol

[paper lava]

Anyone here successfully done server side RVO avoidance?

[cosmic pollen]

l want when my player press ready button add +1 and when he preess it again to remove -1 how can l cast it to gamemode and when it reach 5 with ready teleport

[cold chasm]

failed at hiding your among us code 😛

[cosmic pollen]

U GOT ME

tired of trying find solutions

😄

my target is learn @cold chasm

[summer tide]

What would be the high level implementation of multiplayer level design that could be saved and played?

[bitter oriole]

Well mostly you need save data that's a nice USTRUCT you can copy around

[summer tide]

I c just like saving and loading struct data

[silent valley]

you mean like user generated levels? players placing buildings etc?

[waxen socket]

Good morning. I'm looking for advice on replicating attachments.

I'd like to spawn an actor which itself will spawn an actor on BeginPlay. I want to immediately attach the second actor to the first and have this replicate properly.

Is this a difficult arrangement to accomplish and are there any pitfalls I could avoid?

Cheers.

[summer tide]

@silent valley Yes small levels

[silent valley]

there's nothing built in but there's a few plugins that offer this kind of system
the devil is in the details though, does it need to support multiplayer, durability, do you have a resource system it needs to hook into, etcetc

e.g. https://www.unrealengine.com/marketplace/en-US/product/simple-building-system

[kindred widget]

@waxen socket All you need to do is call attachement on the server, assuming that both of these objects are replicated, it will update that on all clients.

[waxen socket]

Thanks for your reply. There's isn't a race condition I need to be wary of?

[kindred widget]

Both actors are replicated, and you're spawning them both on the server to replicate to clients?

[waxen socket]

Yes, but one is spawning the other and then attaching it to itself. I thought that might cause a race condition if say, the second actor hasn't had time to replicate by the time it's told to attach.

[chrome bay]

It'll work

The engines' built-in movement replication will handle it

[kindred widget]

As long as you're doing it all on the server, there's no race condition to be worried about.

[chrome bay]

Make sure the actor that is being attached replicates movement

[waxen socket]

Just sounds too good to be true... but I trust you guys. I'll give it a whirl.

[chrome bay]

It's because it's driven through RepNotify callbacks

[kindred widget]

Do you have to replicate it's movement? I thought attaching it to the other actor would use that other actor's hierarchy for movement?

[chrome bay]

Attachment replication is done via replicated movement

Oh actually, looks like it replicates attachments regardless

So you don't even need that

See AActor::GatherCurrentMovement()

[kindred widget]

I was about to go looking at my weapons again, I didn't remember setting replicates movement on them, haha.

[chrome bay]

Well weapons I attach locally personally but yeah, you don't need to check it for that by the looks of it

[waxen socket]

The actor type that I'm attaching has replicated movement enabled by default. Should I bother to turn it off in this case?

[chrome bay]

If the actor never moves then you can disable it yeah

[waxen socket]

Cooliosis is your diagnosis.

Thanks.

[kindred widget]

Replication conditions happen on the CDO, right? And it's more or less not possible to change that for say a single instance of something. So the only way to change a replication condition is a subclass of the object?

[silent valley]

You can use DOREPLIFETIME_CONDITION_NOTIFY to dynamically adjust replication conditions per instance

I think... something like that anyway

we do it in our code but I can't find it right now...!

[kindred widget]

I'm not finding much on that, but that looks like a specifier for whether or not to call a notify function?

[chrome bay]

Conditions are always from the CDO

[kindred widget]

To be more clear, I'm trying to redo my inventory system. I have this on a component, and it feels odd to create an entire subclass over something as simple as setting it to replicate to all, or replicate to only the client owner.

[chrome bay]

No choice unfortunately

[kindred widget]

Moo.

[chrome bay]

You can disable/enable a property at runtime with PreReplication but that's all you get at runtime

GetLifetimeReplicatedProps is only ever called on the class-default object

[silent valley]

how do you enable the Push replication stuff?

always struggle to find that

[chrome bay]

Check out PushModel.h

has all the notes there

[kindred widget]

I'll just subclass it, thankfully it's only for one class but I'll worry about that a little later. That actually does remind me though. Do FastArrays replication follow the same protocol for replication conditions? Such as setting it for owner only, I just specify that in the same way I would a normal TArray?

[chrome bay]

yeah

I believe you have to add a definition to the build.cs like WITH_PUSH_MODEL 1 or something

Otherwise it's disabled. But it might require a source build to use... I can't remember

Ah that was it

Add "NetCore" to your build.cs

and add bWithPushModel = true to your Target.cs

tbh though Epic says it only provides "marginal benefit at best" so... y'know 😄

[silent valley]

orly

[odd iron]

Hi Guys is anyone working with Playfab i have a question for him ?

[split siren]

Client can request spawning of some actor on the server.

Can I use const TSoftClassPtr<AActor>& spawnClass to indicate what Actor client wants to spawn? The server can reject it, so I thought TSoftClassPtr would be better than straight out UClass* to prevent it being loaded into memory if not needed

UFUNCTION(BlueprintCallable, Server, Reliable, WithValidation) void SpawnActorServer(const TSoftClassPtr<ABuildingPartBase>& spawnClass);

[chrome bay]

Yep that's fine

Just bear in mind it will pass the full path of the class everytime

If the class is already loaded and has been used over the network, it might already have a NetGUID assigned

[rich ridge]

to save the bandwidth, you could pass uint8 and do branching on server...
or you could have different function for different spawn class type

@odd iron I have explored a bit.

[odd iron]

Last Devil have you tried to Use A RegisterGame and Try to make the players joining ? @rich ridge

i want the BuildId of the Server and i dont know how to integrate the GSDK its have alot of Errors while compiling\

[rich ridge]

nope, i didn't go in session side of playfab.

[odd iron]

how far you went

[rich ridge]

GSDK-> Gamelift SDK?

[odd iron]

GSDK of Playfab

https://docs.microsoft.com/en-us/gaming/playfab/features/multiplayer/servers/integrating-game-servers-with-gsdk

[rich ridge]

i only explored leaderboard, player auth, achievements

[odd iron]

ah nice

its cool btw

i want to make a server that all platforms can join

Dedicated one

[rich ridge]

i would have explored more, but in free tier they only allowed to run 20 hours of dedicated server, so after knowing that I stopped

[odd iron]

If you use their servers yea

but if you use Custom Server its open i think

[rich ridge]

i can't test my game in 20 hours per month limit

[odd iron]

Host the Server on any machine and use node " Register Game "

[rich ridge]

Playfab doesn't list free tier limits clearly.

so be careful

[odd iron]

Yes i read about that but idk

[rich ridge]

for example in free tier you can max have 300 leaderboards

there is no friend invite system in playfab

[split siren]

Interesting, so it might be less bandwidth intensive to use just UClass* ? TSoftClassPtr can be quite lenghty

[odd iron]

Party ?

[rich ridge]

i dont know about that

[odd iron]

Yes you have that Service you Can use Party or Group system but party have Voice and Chat ability

[chrome bay]

@split siren yeah it depends, soft class ptr will always serialize to the path name

Whereas an already-acked UClass will serialize to a netguid

(path name until acked)

But like LAST_DEVIL says if you have a fixed list of objects that can be passed to that function, you could ID them some other way using an array index into a data LUT or something

[rich ridge]

@odd iron Playfab trying to replicate the features from GameSparks

[odd iron]

but its cheap i think @rich ridge

[rich ridge]

Gamesaprks also used to be damm cheap and feature rich before amazon ruined it

[split siren]

@chrome bay True, table is the way to go, I was mainly curious how bad of an idea would it be to pass soft ptr. Thank you ALL!

[rich ridge]

amazon trying to introduce per MAU billing model in Gamesparks

[odd iron]

yes 0.008$ i think for Standard Plan

[rich ridge]

earlier it was 0.002

and had 100K free MAU

[odd iron]

lol

i think its expensive now

[rich ridge]

and after increasing the pricing they have put throttling limit on resources like cloud-code (10 second execution limit)

[odd iron]

eh i dont like it

[rich ridge]

so i m completely relying on Epic for my backend

[odd iron]

they told me but there is not BP Plugin i think

[rich ridge]

the plugin work is in under development, but they didn't decline they wont add bp support, but they didn't confirm either

as per my understanding bp support will require OSS re-write

and I don't think epic will do that

[odd iron]

well my knowledge in this subject is limited

but if found a solution for the Playfab i will use it till Epic Do something

[rich ridge]

OSS classes are neither UStructs nor UObject

[bitter oriole]

There's already an OSS plugin for EOS services

[rich ridge]

that's not official right?

and there is indeed a plugin with BP support on marketplace

[bitter oriole]

It's not official

[odd iron]

Plugin support BP for EOS ?

[rich ridge]

that plugin is not specific to EOS, it is for OSS
wait, there is EOS plugin as well

[bitter oriole]

UE4 also has an EOS OSS in the source, btw

Doesn't do much IIRC

[rich ridge]

no they made quite a progress

even they added support for consoles in that EOS plugin

[bitter oriole]

I guess using Advanced Sessions on top works to a large extent

[odd iron]

but advanced session can't be used for mobile or Consoles right ?

if i can i will end the problem of Playfab

[bitter oriole]

AS simply exposes OSS to Blueprint.

Whatever OSS you are using on mobile and console, if any, should work

[odd iron]

Cross platform

So the Mobile can join a session made on PC ?

[rich ridge]

yes it can

[odd iron]

i mean player of PC can make Mobile Player Join him

well

[bitter oriole]

That's completely irrelevant to advanced sessions really

[odd iron]

then i can register an Advanced Session into the Playfab Legacy Servers

[rich ridge]

but EOS plugin from master branch require some extra effort to make it work on Android

I have EOS-Samples ported to Android and it works

so i didn't had to write much code

[odd iron]

I will see advanced session after dinner

[summer tide]

In multiplayer, prior loading a level, should I create the loading widget in controller? I've tried that but the timing is different, i see the server loading screen on time but the client sees the level for a few seconds then the loading screen appears which is wrong. Also the remove all widget works fine in server to remove the menus but client still sees them until the level is loaded. What's wrong?

[peak sentinel]

I've been trying to make my replicated FloatingPawnMovement work, but for some reason CubicInterp is not working as intended. I've managed to store "old" and "new" data between server updates and looking for alternatives to CubicInterp to "smooth" the movement. Any ideas?

FMath::Lerp also not working very well, it hitches/jitters a lot

[blissful remnant]

Is anyone working on a multiplayer game using the Steam subsystem? Can anyone confirm that adding a custom session setting makes the session invisible for searches? (which means that the Steam OSS is broken)

[inner sand]

I'm using a blueprint session based listen server looking for the best way to completely shutdown session for all players, simply destroying session and opening new level doesn't seem to do the trick, is there a way to this w/ out c++

[kindred widget]

Question about FastArrays, how does sorting them on client side work? Will this affect the array's ability to update? I know that indexes are not guaranteed to be in the same order on all machines, so I assume that changing their order on each machine shouldn't have any impact. What about changing a value locally? How does that affect anything? More or less trying to understand how a client updates it's local array with the delta sent from the server so I can avoid breaking it.

[rich ridge]

@kindred widget Ideally I won't mutate any replicatable variable.. I would make a shallow copy of that array and then mutate it

[kindred widget]

Hmm. I suppose I can. I try to avoid copying data where I can. But eh.

[vivid seal]

this is kind of a generic question, but is it typically better to have a bunch of replicated UObjects managed by a component (i need the component as a central place to find these objects), or to have a FastArray in the component that contains the data needed to independently spawn those UObjects (non-replicated) on the client and update them?

the second one is less intuitive but i don't know if it makes a difference in terms of networking load or anything

[lucid vault]

I found this message through a search for "turn in place jitter". I'm curious if you are having the same issue as me.
When my character's yaw changes during TIP, his hands and weapons jitter left and right. I haven't been able to figure out why

It's a slight jitter, but very annoying. My TIP system uses root bone rotation

[dark edge]

Turning place should be completely client-side right?

[lucid vault]

Yeah

The jitter occurs offline as well

I store the yaw offest every frame by the difference in actor rotation change, and I use that yawoffest for rotating the root bone and rotating the player spine (instead of using an aim offset)

I have a feeling that the issue is relating to using the spine rotation instead of an aim offset

It only jitters during the actual TIP though

[meager spade]

i have not looked into it for a while

but we use it in TRS2, and we don't have that jitter

@lucid vault https://www.thegames.dev/snaps/sQHvIIffgU.mp4

[lucid vault]

Is that using spine rotation?

[meager spade]

counter rotating the root bone

just like th is

[lucid vault]

Yeah, that's what I am doing as well

I was more so talking about the way in which you rotate the upper body

Notice the minor stutter at the end. That's a listen server

The same variable that I use to rotate the root bone (YawOffset) is used to rotate my spine horizontally

I'm curious as to whether converting my animBP to c++ may help the issue. I've tried pretty much every option except that

[digital blaze]

I have a strange problem, I'm not sure specific to multiplayer / steam, but I create a game w/ MenuMode & MenuPlayerController. When I start a game, I go to GameplayMode & GameplayController. For start I dropped my menu create/display into MenuPlayerController EventBeginPlay, but when I create a hosted game, that menu is being re-created. I put string prints into the EventBeginPlay of MenuPlayerController & GameplayController, and when I create a game and load a map set to GameplayMode, both are firing. Any possible explanation why two controllers would be firing?

[shut gyro]

Anyone that is using 4.25 having trouble with level transfer on multiplayer?

I am getting the following error:

[2021.01.12-21.21.44:287][844]LogWindows: Error: === Critical error: ===
[2021.01.12-21.21.44:288][844]LogWindows: Error: 
[2021.01.12-21.21.44:288][844]LogWindows: Error: Fatal error!
[2021.01.12-21.21.44:288][844]LogWindows: Error: 
[2021.01.12-21.21.44:288][844]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION 0x1023bb00
[2021.01.12-21.21.44:288][844]LogWindows: Error: 
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x000001be1023bb00 UnknownFunction []
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x00007ffda3f76347 UE4Editor-OnlineSubsystemUtils.dll!UIpNetDriver::~UIpNetDriver() []
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x00007ffda3e0ce0b UE4Editor-OnlineSubsystemEpic.dll!UNetDriverEOS::`vector deleting destructor'() []
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x00007ffdc34788da UE4Editor-CoreUObject.dll!FAsyncPurge::TickDestroyObjects() [D:\Github\UnrealEngine-Custom\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:308]
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x00007ffdc34374dd UE4Editor-CoreUObject.dll!IncrementalDestroyGarbage() [D:\Github\UnrealEngine-Custom\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:1689]
[2021.01.12-21.21.44:288][844]LogWindows: Error: [Callstack] 0x00007ffdc3437a33 UE4Editor-CoreUObject.dll!IncrementalPurgeGarbage()

[cinder totem]

Hello ! I'm new to multiplayer and I have an issue :

• I'm trying to make an RTS, I have my a RTS_PlayerController controlling a RTS_CameraPawn
• I try to make multiplayer with 1 client 1 listenserver (I assumed that was how to do hosting (?))
• What happen is, server start, spawn a controller, possess the pawn every cool
• Then the client join, the server spawn a controller, a pawn, but he does not possess it because, ON SERVER, when I do GetControlledPawn so set a variable, it returns null
• It generate some error because I trying to use this pawn in my movements
• Then after a second or two, the client spawn his controller and pawn, he does possess it, and error stops (why ?? the server variable is still set to null so .. ? maybe has to do with input not called ?)

Does anyone know why ? I struggling a bit finding on google wtf is going on and / or a good tutorial on playerController and networking in general

Thanks

[lilac raven]

Hi all! I am currently trying to get my university team projects game working with steam and dedicated servers, however for whatever reason, when testing it on my pc, the join node returns success but it doesnt seem to even join the session, furthermore, my server wont show up in steams server internet tab, even though my ports are forwarded.

Any idea on why this is? any help greatly appreciated!

[glad sedge]

hey @lilac raven are you sure it's not joining, or is it that your editor menu isn't updating?

[lilac raven]

well, I dont have a server search like many tutorials show, im simply grabbing the first server and connecting, it does load my ui as its on join node success but the level doesnt change it just stays the same. But even with multiple players it wont show the other player, I even have a check network players to load game with more than one player, but it doesnt even load suggesting no players are connected. Previously I used open IP and it worked fine.

It joins (or so it says) then soon after it reloads the game for clients

server log shows nothing

[glad sedge]

But you in editor mode or standalone?

[lilac raven]

standalone

both server and client built running standalone

[glad sedge]

ah right. Yeah I had dramas with that too

My advice is do a server build that you can run locally

Test it that way. It's a pain but you'll get proper behaviour IMO

[lilac raven]

Yeah, my issue came up when doing a playtest day yesterday for my uni, I had to basically hard code it to connect to the server hosted on my second machine. Ideally id use sessions system for better features and have them use some sort of account (steam in this case) and its corresponding matchmaking service. Heavily considering purchasing the EOS Core plugin and using EOS as i have it set up on my account

[glad sedge]

Might be the way to go

TBH I haven't gone down the Steam Session route just yet

[lilac raven]

Biggest ballache of my life tbh 😂

[glad sedge]

Yeah I hear horror stories

I'm a web dev though so maybe it's not so bad for the online service shit

but that whole steam thing seems like a farce

I'll be leaning hard into plugins me thinks

[lilac raven]

Yeah I just bought the eos core plugin, it worked right off the bat

should be perfect for me and my team!

[humble crow]

Hey all. Is it possible to have a Game Instance Subsystem that only initializes on the server?

[meager spade]

ya

override virtual bool ShouldCreateSubsystem(UObject* Outer) const { return true; } and do bool UMySubsystem::ShouldCreateSubsystem(UObject* Outer) { #if WITH_SERVER_CODE return true; #endif return false; }

something like that

only for dedicated servers tho

[humble crow]

wow. Thanks! If its only for dedicated, would I still be able to test if I play as Listen Server?

[meager spade]

it will return true iirc in editor 🤷

but false if you build a server

[humble crow]

ok sounds good. Thanks so much for the help!

[dull lance]

a pretty noob question but I forgot on this one: when playing PIE in Multiplayer mode with editor as listen server, the client pawn doesn't get a controller. Does anyone know why?

If I turn debugger on, it says that the pawn has no controller

but the world outliner shows both pawns and both ctlrs

[meager spade]

missing a super call?

not calling possess?

[dull lance]

the default game mode pawn

@meager spade

[lost inlet]

WITH_SERVER_CODE includes a game (not client) target

you can use UE_SERVER for actually a dedicated server

you can even do stuff like game modules that only get compiled into the dedicated server too

[lost inlet]

cc above

[summer tide]

I'm trying to place a loading screen during multiplayer level loading

Where should the code go?

[lost inlet]

might want to be more specific, are you using the movie player for loading screens like shootergame does?

[summer tide]

No just a widget

I'm using the loading screen plugin as well. But I have a voxel world so I've to wait until the world is loaded.

SO I use combination of both.

The plugin handles the loading of one level to another and the custom widget is when the voxel world is being loaded.

If I create the widget in my controller which is for server and owning client, it works but the client doesn't see the loading screen on time or with delay

[lost inlet]

which plugin? the one by nick darnell?

[summer tide]

Async loading free one

[lost inlet]

I need a link or anything

but if this allows you to pick a UMG widget, expect loading crashes

[summer tide]

https://www.unrealengine.com/marketplace/en-US/product/async-loading-screen

It works well but in my case I need more then that

[lost inlet]

if it's support with a specific plugin then you should ask the author

[summer tide]

never mind that - let's say when a level is opened where should I create the widget so that all players see the loading screen on time.

[lost inlet]

however, loading in MP shouldn't be any different from local. however if you need a fake loading screen to cover up more stuff happening post load, then that might be specific to the plugin

[summer tide]

Let's say I don't use the plugin. I'm only talking about after the level is loaded and I want to wait some other things to load.

@lost inlet ANy advise

[lost inlet]

like I said, recreate the widget, add it to viewport

we do a fake loading screen after the main loading screen while stuff is streaming

[summer tide]

If I create the widget in my controller's begin play I don't see it appear on clients screen

[lost inlet]

then that's probably to do with how you're creating it, which isn't to do with MP

[summer tide]

My point is from my lobby When I click on start new game which will take me to the gameplay level. ISince the server starts the game, I want to remove all the players lobby menu and show them the same loading screen. This is what I'm trying to achieve

[digital blaze]

any help, on open level, is there any reason my old player controller would fire EventBeginPlay on the new level load, before changing controllers to the one set by game mode??

[summer tide]

Are you using the same player ctrl on both levels? If you are using the same game mode then most likely you are using the same ctrl

[digital blaze]

No, i'm changing, I think this may be steam related though as it doesn't happen in the emulator

is there a best practice for loading main menu, and then removing it, i followed the wes multiplayer tutorial which uses two player controllers

[summer tide]

Load the main menu from your level BP. When you go from level to level you can remove all widget prior creating new ones.

[digital blaze]

@summer tide so on level load call my menu creation script on MenuPlayerController? I think one thing that throws me off is putting my menu creation in controller feels so bad.

[summer tide]

No - Create Widget in your Level blueprint class. You can also create them in your game instance. Then call the events or function from your level blueprint.

[digital blaze]

@summer tide ok will do, secondly, I read the network compandium and they talk a lot about who runs what like game mode on server only, player controller server/client, umg client only, but what about maps?

[summer tide]

Widgets are owning clients only

Every player loads the level so whatever widgets you create in the level BP will load to every player.

[digital blaze]

ok, thanks, a lot of stuff to try now 😄

[thin stratus]

Honestly. Don't use the LevelBP. Having a MenuPlayerController and using IsLocallyControlled on BeginPlay is cleaner

[dull lance]

I died inside when reading that

[odd iron]

@bitter oriole Advanced Session Worked Crossplatform Thanks now i have to configure it perfectly

[thin stratus]

Haven't read all the posts above. But the LevelBP is just Garbage for that

[digital blaze]

ok, I tried both in player controller and in map blueprint, I cannot for the life of me understand my issue, when I use open level, I see the map change to the desired default third person map, and then my Menu is recreated as if my MenuController beginplay is fired again, new Gameplay controller is indeed loaded b/c I see a string printed from it! With print string, I see both my MenuController and GameplayController fire from BeginPlay when hosting a session! Can my project have become corrupted so its just buggy. Secondly, i've been using launch as standalone and right click launch on project.uproject, should both these work? I'm using steam so I wonder if there is some specific detail i'm missing >< - advanced session controller to be exact

[kindred widget]

@digital blaze Wait, you see both controllers run their beginplay after the open level call, after the new level is open and loaded?

[celest zodiac]

I'm strangling to use ClientTravel in didactited server, it seem no session

It possible to make multiple session in didactited server?

[digital blaze]

@kindred widget yes i'm so confused as to why, I"m just working off a example project but I think maybe I should just start a new project since I can't understand reasoning for this behavior

[kindred widget]

So you get the menu controller's beginplay, twice. Once at menu load, and once in the game load? If that

If that's the case, your game controller doesn't inherit from your menu controller does it?

[digital blaze]

could there be an error in starting a game w/ steam which would bounce me back to the prevoius map?

mmm, i read somewhere to put a sound file so you can tell if you're still on map, I should try that

[kindred widget]

I haven't personally seen anything odd like that when using steam. Technically steam shouldn't affect your game like that.

But does the menu controller beginplay run twice?

[digital blaze]

Ah ok, I think my map is being instantly re-changed to main menu level, so i was looking at the wrong issue!

like i see my new correct map flash for a second and then the menu would appear

[rich ridge]

you can make multiple sessions, but why you need more than one sessions ?
you need to understand why a session is required,
Creating a session means, the dedicated server broadcasts its IP and PORT and joining pre-requisites to the public (means to your players).
So now think how creating more than one sessions on server will solve your problem?

[summer tide]

In multiplayer my SAVED game loads properly, until I close the game windows. Any way to debug that? WHen I restart the game windows, I get the default players as if I started the game new.

[kindred widget]

What do you mean by Game Windows? Cause that makes it sound like you're expecting it to load after closing the game. O.o

[summer tide]

The executable file. Not executable I mean when run the project by right clicking the project file.

[kindred widget]

How are you saving it?

[summer tide]

it works fine in single player mode, in all conditions.

I'm using the default save system

[kindred widget]

Odd that it works in single player and not multi. The saving is all done on the server machine?

[summer tide]

I'm running it on the same computer.

[kindred widget]

I mean coding wise. How are you saving? Is it all done server side and replicated on load and client join, or do clients save stuff locally and upload to the server?

[summer tide]

In my controller I call the server RPC which saves the game including char meshes and location.

WHen I load both players join the lobby then who has the auth loads the game.

I know game instance gets destroyed/created when you restart the game/project.

Hopefully it has nothing to do with that

I should test it on diff pc prior debugging.

I might know why. I am using the player name to save and the name changes every time you restart.

[silent valley]

you should save the world to a world savegame, and player specific data to player savegames

e.g.

FString saveName(TEXT("WorldSave"));
saveName.Append("-");
saveName.Append(World->GetMapName());

yes, by default player name is random each time, you can override it via AGameModeBase::Login()
playerController->SetName(playerName)

how you make a reliable player name is a bit tricky though 😉

[wheat magnet]

how to set view target with blend in client side? mean replicated

[glad sedge]

Why would you need to replicate that?

[wheat magnet]

the set view target with blend only works for player controller

with index 0

how to at client side

[glad sedge]

ohh you're not doing this from PC?

[wheat magnet]

because when i try to do this in client side, it set the view target of server, not client

mean RPC?

set view target with blend client multiplayer replicate

how to set view target with blend client multiplayer replicate****

?

[glad sedge]

Sorry I'm not understanding.

[wheat magnet]

set view target with blend isn't working on client side

how to replicate set view target with blend node

[dark edge]

Don't replicate that, replicate the state change that should trigger it.

[wheat magnet]

what mean by state change trigger?

i mean where should i find state

you mean game state?

or player state?

[unkempt tiger]

what triggers set view target on the server?

something needs to happen for set view target to be called

[unkempt tiger]

replicate whatever it is that needs to happen instead, and then on the client, that code leads to set view target getting called

[wheat magnet]

this is my code for RPC call

is this fine?

@unkempt tiger @dark edge

[dark edge]

No it's not fine. What is the original thing that triggers all this? What are you trying to do.

[wheat magnet]

here is the original interact

when i press middle mouse

it call server, and then multicast

[dark edge]

Is this just for general interaction?

[wheat magnet]

yes

can you help?

is there any alternative to set view target with blender?

[dark edge]

Set the view Target on the client. The server should not really even have any idea of what a view target is.

[wheat magnet]

should i run on owning client?

[dark edge]

No, just on the client side of whatever you are doing, do the view Target blend.

Your interaction setup is way over complicated. it should just be the client telling the server that it wants to interact with whatever object and then the server does whatever with it. There should be no need to multicast

[meager spade]

^

my interact system is: Client interacts -> Tells server. Client then does any local interaction stuff, Server does its interaction stuff. i use 0 multicasts. Only time a multicast is used is from server on successful interaction if needed to spawn some one off particles.

[dry zodiac]

Hey everyone, do you know how can I handle getting ping while using Steam? I am getting 9999 all the time.

[silent valley]

you mean FOnlineSessionSearchResult::PingInMs ?

this has always worked ok for me searching for sessions in the front end - but I'm not sure about the ingame ping after connecting

[meager spade]

in game ping you do PlayerState->Ping * 4

[dry zodiac]

Actually I'm saying this.

[dry zodiac]

Yes I need to get servers ping. @meager spade

[silent valley]

idk, sorry it always just worked for me

[dry zodiac]

Is there anything to do extra? I create a basic create session, find session project. I'm using my own Steam id and testing via steam with 2 different pc and 2 different net.

Tested with unreal default steam os and advanced session.

[silent valley]

I use native Steam OS and mostly use C++, and it worked ok for me.
I don't know if it's important but in FindSessions in C++ I set PingBucketSize=50 (doesn't seem to be a param in the BP screenshot you posted)

[dry zodiac]

Thanks for the advice, I will check that.

[eternal canyon]

am I the only one who gets rubberbanding when using custom movement character movement component on bsps?

works fine on other things

like a landscape

[meager spade]

bsps are not something you should be moving on

iirc

[twin juniper]

why PlayerState->Ping x 4 🤔

[dry zodiac]

Actually I am trying to listing sessions according to low ping. That's why I need server ping.

[chrome bay]

@dry zodiac You can't get ping to a lobby in Steam, not accurate in-game ping anyway for a session.

You can ping the ip address manually in C++ and get a very estimated ping from that

[twin juniper]

@winged badger

i tried the way you suggested of having a slot type in the fast array to handle everything in one actor component
but what if the inventory is on an actor(box) in game world ?

i have an rpc to put the item in actor's inventory which takes (UInventoryComp* ptr, int32 slot)
which can be called on a player

this time the object is rooted but still null when moved like wtf?

https://media2.giphy.com/media/YPNBdBrhF3Y27YKD50/giphy.gif

[winged badger]

a single actor with just one fastarray can handle your entire world's inventory really

[twin juniper]

that's what i have

but the actor in world must have an inventory too

the red box

[lusty sky]

@twin juniper other players can interact with that box too ?

[twin juniper]

yes they can

[lusty sky]

@winged badger if you have sometime can you explain?
i would like to know how to handle that in one component too

[winged badger]

is that item struct or uobject?

[twin juniper]

its a struct for fastarray which contains item uobject and int for number of items

in an actor com

[winged badger]

with each actor managing its own inventory

complication comes from you having to change which actor replicates the UObject

simpler of the 2 approaches is to instantiate a new one on server once you transfer

other includes synchronizing Rename to change its outer

[twin juniper]

its known inventory on player owner is playercontroller
in the game world is the actor

this is how im doing it

const FSlot CurrentSlot = GetSlot(SlotIndex);
             const FSlot OtherSlot = OtherInventory->
                                         GetSlot(OtherSlotIndex);
         
             if (CurrentSlot.IsEmpty()) return;
             if (!OtherSlot.IsEmpty()) return;
         
             const TWeakObjectPtr<UItem> ItemCopy = 
                         DuplicateObject(CurrentSlot.Item.Get(), GetOwner());
     
             if (!ItemCopy.IsValid() || ItemCopy->IsPendingKillOrUnreachable() || 
             !ItemCopy->IsValidLowLevel()) return;
             ItemCopy->AddToRoot();
         
             // move item to the other inventory
             OtherInventory->Slots.Array[OtherSlotIndex].Item = ItemCopy;
             OtherInventory->Slots.Array[OtherSlotIndex].Quantity = 
                                                         SourceSlot.Quantity;
             OtherInventory->Slots.MarkItemDirty(Slots.Array[OtherSlotIndex]);
         
             // remove item from the current inventory
             Slots.Array[SlotIndex].Item->RemoveFromRoot();
             Slots.Array[SlotIndex].Item->MarkPendingKill();
             Slots.Array[SlotIndex].Item.Reset();
             Slots.Array[SlotIndex].Quantity = 0;
             Slots.MarkItemDirty(Slots.Array[SlotIndex]);

[winged badger]

the way i'd do it, and it would help performance along the way

is put the fast array into an InventoryManager

and have all inventory from all players and other actors in the world in it

replicated via its fastarray

might remove the need to actually replicate lootboxes and such at all

in that scenario, your fastarrayitem would also need a poitner to the inventory component its in at the moment

[limber gyro]

is it worth it to make a custom movement component for a small dash? i got it working already but i was wondering if going to the trouble of making it replicate properly is going to be worth the additional work

maybe some one with some experience in that area could tell me if it is something easy todo or if it is hard task

[elder sable]

Hi, how can i persist player state data across map travel ?

[limber gyro]

player state class probably

not sure if it is persistent tho but i belive it is

[silent valley]

You mean like a sprint ability?

[limber gyro]

the way i am doing it right now is with interpolation

i interpolate the player position quite fast in the server and the client at the same time

it works

but i am quite sure that it is not the right way to do it

[elder sable]

I'm using player state class but i can't find a way to persist data, i found many different answers but i don't know what s is the good way to do. (I just want to select some player choice in a lobby map then travel to the game map and keep those datas)

[silent valley]

I noticed that in 4.26 you now have this mechanism that looks easier than overriding CMC
https://docs.unrealengine.com/en-US/API/Runtime/Engine/GameFramework/FCharacterNetworkMoveData/index.html

but I've not used it myself

[glossy veldt]

Can someone maybe help me with the following problem (stuck since over a week):
I have set up a multiplayer system with the advanced session plugin, where Players join a lobby and then the host starts the game.
But only the host then gets possessed ingame and the client wont receive any inputs.

[limber gyro]

what about game state?

[elder sable]

It will be the same problem no ?

[limber gyro]

thats why to open ended to know whats causing the issue mate

[limber gyro]

thats a good question, i dont know but i am sure one of those classes should work

[glossy veldt]

@limber gyro i can send you screenshots in your dms if you want

[elder sable]

Yes but automatically or i have to copy data manually ? i saw some answers where they talk about CopyProperties

[limber gyro]

that would require me to take a look at the code/bp's and honestly i dont feel like it today

try to narrow it down a bit

what happens to the client in game?

do they spawn at all?

[glossy veldt]

@limber gyro it not a lot of code but i'll try to explain.

Yes the client spawns but does not get possessed

only the host (im using listen servers)

[limber gyro]

if you are using a costume character you might have to posses manualy

[glossy veldt]

what do you mean by that? can you explain?

[limber gyro]

well the game will spawn a character that is specified in your game mode class

[glossy veldt]

you mean the default pawn class?

[limber gyro]

if you are trying to to posses something else

it needs logic for that

if you didnt change anything then yes

[glossy veldt]

the default pawn class is none.
I am then spawning an actor at a random player start and let the player controller possess it

[limber gyro]

but is it the default pawn? or is it something else?

[glossy veldt]

It works for the host, but the client only gets his camera set but cant move or receive other input

the character i am spawning for the pawn is a custom character i made

[limber gyro]

ok so i am guessing the issue is on ur posses function

ima copy paste my function for possesing here

[glossy veldt]

alright thanks

[limber gyro]

take a look and see if u see anything off wiht urs

[glossy veldt]

i think the gamemode just does not get the right player controller to possess the character

[limber gyro]

gimme a sec

[glossy veldt]

yeah no problem

[limber gyro]

void AArenaGameMode::SwapCharacter_Implementation(APlayerController * controller, TSubclassOf<APawn> character, AProjectArenaPlayerState* state)
{
    FTransform transform;

    FName teamNameToName = FName(*FString::FromInt(state->team));
    

    if (controller->GetPawn())
    {
        //later chane to a proper neutraltransform
        transform = controller->GetPawn()->GetTransform();
        controller->GetPawn()->Destroy();

        
    }

    FActorSpawnParameters ActorSpawnParams;
    ActorSpawnParams.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;


    APawn* spawnedObject = GetWorld()->SpawnActor<APawn>(character, transform, ActorSpawnParams); //character n ta a passar na blueprint da umg

    //set the location the player spawned
    AProjectArenaPlayerState* playerState = controller->GetPlayerState<AProjectArenaPlayerState>();
    playerState->start = spawnedObject->GetActorLocation();

    if(spawnedObject)
    {
        controller->Possess(spawnedObject);
    }

    

}
    ```

this is a server reliable blueprintCallable function

i then call it on the player controler

with the class of character that i want and the controler that i want aswell

[glossy veldt]

i am using blueprints so i cant use that function but i'll try to understand it and maybe implement it in BP

[limber gyro]

just take the names of functions

and see if you are calling everything that needs to be called

you should also override ur "onPossesed" method to see if the character is being possesed at all

[glossy veldt]

This is my implementation. The event gets called from the player controller

looks pretty similar to your C++ implementation

at least i think

[limber gyro]

is it happening on the server?

that function?

[glossy veldt]

its in the gamemode so yes

[limber gyro]

i see custom event

i think it should say server somewhere

[glossy veldt]

i thought every event in the gamemode gets called on the server because only the server has the gamemodee

[limber gyro]

well in theory yes

in practice i dont think it will work lol

[glossy veldt]

but the player spawning should be handled in the gamemode right?

[limber gyro]

it can be handled anywhere

you gotta spawn things in the server if you want them to replicate

so those functions have to have the server property

which means it will execute on the server

[glossy veldt]

so replicate and execute on server?

[limber gyro]

thats my guess yes

altho what u said makes sense

[glossy veldt]

the event gets called from an Event in the PC after the player chose a class
And that event in the Player Controller runs on the server

[limber gyro]

try and see what happens

cant hurt

[elder sable]

When the event CopyProperties from player state is called ?

[glossy veldt]

tried it and still not working

[rose egret]

I spawn an actor that has the following property.

    TArray<AActor*> AttachedItems;

given the assumption some of the items are not relevant to client or not arrived yet (pointer cant be resolved)
would the length of array be the same with server side ?

[limber gyro]

override the possesed function to see if it is actualy possesing

[glossy veldt]

alright wait

[limber gyro]

if that doenst work, spawn a default pawn and posses it to see if that works

just to see if the issue is in the replication or in ur custom character

[glossy veldt]

@limber gyro so for two players it gets fired 2 times but the client cannot move or do anything else+

i will try that later

[limber gyro]

so it is possesing

so ye, try the other pawn and see if the issue is in the pawn

[limber gyro]

that is actualy a very good question, i am not sure many here will be able to answer, maybe slo or chaos

also not sure if its a good idea to replicate arrays

might be a bit hard on the network

[rose egret]

its just one time . InitialOnly.

class ABatchItemDropper : public AActor
{

    UPROPERTY(Transient, Replicated)
    TArray<AActor*> AttachedItems;
    UPROPERTY(Transient, Replicated)
    uint8 RandSeed;
}

I use it as item dropper

[limber gyro]

theres probably a better way to do that

[glossy veldt]

@limber gyro i will stop now and continue later - can i dm you then?

[rose egret]

yea but it worked and I am ok with that

[limber gyro]

sure

[glossy veldt]

@limber gyro thanks man - really appreciate your help

[twin juniper]

hello im having a little issue with replication in a storage container

So the storage inventory slot value is replicated, and when i click on the widget button to take that item. if its the server it works fine and clears that slot for everyone. if its the client, i cant figure out how to clear it for everyone as well. i even checked for authority and run it on server, nothing works

if pics are needed i could post if its not fully clear

[limber gyro]

it will only replicate if its spawned on the server i think

is that chest spawned by the server?

[twin juniper]

ok so hold up ill show you in pics, and nah i just have in already placed in the level

[limber gyro]

if its an actor placed in the level it should be owned by the server

have you ticked the replicate box in the actor?

[twin juniper]

so when i hit the take this item button in the widget

these are the custom events in the storage bp

and yes the storage actor is replicated and so is the vairable

if i take it on server, it empties that slot for everyone, if i do it on client it doesnt even empty on that clients side either

[limber gyro]

well if it is taking the above path it shouldnt work

with the bottom one it should i think

a replicated variable means that the value from the server flows to the client

[twin juniper]

if the one who clicked the button is server it goes top

if it was a client it goes down

[limber gyro]

i think that authority check doesnt make sense

[twin juniper]

it works,

[limber gyro]

with a client you want to empty it aswell right?

[twin juniper]

so the idea there is a storage container

everyone can see in it, grab from it and drop items in it, like minecraft

i need it to where if the client changes the slots in the chest, everyone else will see that

[limber gyro]

u dont need a check then

all u need is an rpc setting that variable

[twin juniper]

rpc setting?

[limber gyro]

at least thats what i gatter from those nodes

server RPC

[twin juniper]

whats rpc

[limber gyro]

remote procedure call

its a function that executes on the server

you already have it

i think u just need to remove that check

you are probably confusing things

[twin juniper]

i see, so u think if button is pressed, just make it go down the bottom path of running on server?

without check

[limber gyro]

ye

u dont need to know if its the server at all

[twin juniper]

didnt work

[limber gyro]

why would you want to know if its the server taking a thing or not?

are u using an enum?

[limber gyro]

i am not sure how enums work with replication

[twin juniper]

should work the same as any other variable, works the same in other coding i have

[limber gyro]

are u sure thats not working? can u do a print on tick to see if the state of the variable is changing?

[twin juniper]

sure ill print

[chrome bay]

That's not going to work unless the Client owns the 'Storage Container"

You can't call a Server RPC on something you aren't the owner of

[limber gyro]

oh so thats what i was missing

[chrome bay]

The output log will warn you about that

[twin juniper]

ok so how would i do so?

[chrome bay]

To interact with objects that you don't own (e.g, a chest that multiple players can use), you usually have to go via another actor you do own

Such as a Player Controller, or the Pawn

[twin juniper]

so i need to feed it to the player?

[chrome bay]

No

You need to call an RPC on the Player

[twin juniper]

oh ok,

[chrome bay]

When you have lots of different objects, it can cause a lot of bloat, which is why refactoring things into a more generic "interaction" system is quite common

[limber gyro]

how would that look like in code?

[twin juniper]

so i should get the widget that contains the inventory, then when i click on the take button, tell the player thats server that it needs to change this variable in this actor.

[chrome bay]

Basically that "Empty Through Server" function needs to be in your player controller

Then the player controller calls the actual empty function on the target chest

[twin juniper]

got yah

[chrome bay]

If you don't "Own" an actor, the server/client will ignore Server RPC's

[twin juniper]

ok ill try that,

[limber gyro]

so it needs to be done through like a raycast or at least a proximity check

so that you can actualy interact with the object

[chrome bay]

Well how you call the RPC doesn't matter

it's more about what object you route the RPC through

[limber gyro]

well u still need the reference

[chrome bay]

yeah

[limber gyro]

thats why i am saying

[twin juniper]

ok i got it, let me try it

[chrome bay]

You need to let the server know which chest you're using ofc

[limber gyro]

i didnt know u needed to own the object to call rpc's on in

it

[twin juniper]

yeah ill feed the actor through with the custom event

[chrome bay]

But this kind of thing is exactly why you usually end up making a generic "interaction" system to avoid bloating your player controller with specific functionality

[limber gyro]

´my game doesnt have interactable objects like that

[twin juniper]

whats that mean

[chrome bay]

Well for example, you might have a "Door" object that clients can close

[limber gyro]

means ur gonna need to have all interactable objects derived from one object

[chrome bay]

Instead of having different RPC's and different functions for Doors, Chests, etc.. you build a system they can all use

Not necessarily one base class, interfaces are a good use-case

[twin juniper]

oh yeah like bp interface

[chrome bay]

There's probably a lot of content on building stuff like that out there

Is very common

[limber gyro]

ive been working with ue4 for like 5 years and havent used an interface once lol

[twin juniper]

ok kool, let me try this and ill be back on if it works

@limber gyro wtf? lol

very very useful, gets rid of a lot of needing cast to (thing)

[limber gyro]

i havent had the need

[twin juniper]

well hey, as long as its getting done, id say good job

[limber gyro]

always worked with casts i guess

[silent valley]

its the main way to do multiple inheritance in Unreal C++

[limber gyro]

thats how they do things in the basic tutorials and i never bothered to explore other options

[twin juniper]

basically, interfaces are good for if you want a lot of different items you can pick up

but they all use the same interface

[limber gyro]

well i would do it with a base pickup calss

class''

[chrome bay]

The real issue becomes when you need two completely unrelated classes to have common functionality

E.g, Actor and Pawn

[silent valley]

you can't always have a shared base class though

[limber gyro]

indeed, ive never ran into that tho

[twin juniper]

brb gonna try this

[chrome bay]

Components can also be a way to get around that

But not always

[limber gyro]

i always sorta make the architecture in my head before and i guess since i dont use interfaces ever i always arranjge thing in a way to not need them

i know its lousy haha

[chrome bay]

Just as an example, a "Team Interface" is a really common one

Loads of different totally unrelated objects might have a "Team" of some kind

Using an interface keeps that much cleaner

[limber gyro]

im just using an int for that

[chrome bay]

Right, but say you have a Pawn, a weapon, a Player state etc that all have a team

And you want to access that in a common way

[limber gyro]

makes sense

well currently i only have 3 object types with team

and they all have a variable

for the team

[chrome bay]

Even two is enough for me to use an IFace 😄

[limber gyro]

well i wouldnt go that far with 2 but i can see how that can come in handy

[chrome bay]

It's get necessary as the project grows

You don't want to add a team to something, then have to updated lots of other places in code to account for that new object etc

[limber gyro]

what do u mean

interfaces only specify methods that you have to implement no?

[twin juniper]

@chrome bay I got it to work

Thanks so much for that, that was the block that stopped me from setting up everything else i needed

[silent valley]

We have only 2 Interfaces in our game.
IUsable which is an item a player can equip and that 'does stuff'. Like weapon or a tool. They don't share common base class so interface makes sense.
I also have an interface that is only used to find specific components for automatically saving - it has no functions but if a component derives from it then it will get saved automatically.

[twin juniper]

back to work

[limber gyro]

how does that saving work? u check if it has the interface implemented and simply do an if?

[silent valley]

yeah exactly

no, I think there's a fn to get components with an interface...

lol actually I'm wrong - I've not got round to that bit yet!
there is one function on the interface which gets called automatically in certain conditions

[limber gyro]

ok that makes sense

[silent valley]

my plan is to change the Actor component save code to check for interface - not done it yet tho

[lucid vault]

Is there any way to prevent a true first person camera from clipping through walls when the characters looks down against a wall, without increasing the capsule size?
I want to keep my characters nimble and able to enter tight spaces, but they can see through walls when looking down against a wall because the camera isn't within the capsule once the character has bent his spine

The only solution that I can think of is somehow blacking out the players screen, to prevent cheating

[limber gyro]

i dont know of any way

you could possibly add a camera boom slightly back

and have it shorten when hitting a camera(i think it might do this by default)

hittin a wall''''

[rich ridge]

@lucid vault try to play with camera collision, by default camera collision is ON and behaves odd.

[lucid vault]

Hmm. I'll toy around with that. Another possible solution is to have two capsules. One wide capsule for walls, and a skinnier capsule for everything else

Although, I'm not even sure how I can use multiple capsules. If I remember correctly, only the root capsule is considered for collision

And I don't want to just change the radius if the user is near a wall, as that might cause him to get stuck in other actors in certain situations

I don't think child collision capsules are considered in the CMC

[eternal lake]

Hey there

I've got a really weird issue

I'm making a couch co-op

and each player can shoot etc.

any spawned playerController and pawn cannot spawn projectiles, for some reason

[limber gyro]

we were discussing something moments ago

that might relate to ur issue

[eternal lake]

oh shit really? 😂

[limber gyro]

you cant call rpc's on actors that you dont won

own''

so if ur trying to spawn something through an rpc

[eternal lake]

hmm

[limber gyro]

and u dont own the actor which you call the rpc from

[eternal lake]

no RPCs or replication involved. Offline couch co-op

[limber gyro]

it wont fire

ummm

that does seem weird

[eternal lake]

https://tenor.com/view/no-wack-not-funny-hannibul-gif-5760013

[limber gyro]

never worked with couch coop

sorry man i have no idea

[odd iron]

Is it possible to have more than one advanced session on a dedicated server ?

[odd iron]

and is it possible to launch a dedicated server when the session is full ?

[twilit oak]

are fast arrays considered bIsPushBased or not?

[rich ridge]

Why you want to have multiple sessions on one server?

[odd iron]

I was thinking if the session is full where the other players will go

[rich ridge]

You have wrong idea of maintaining dedicated server...
Usually you maintain pool of servers and when let's say 90% of pool is occupied then you increase the pool size by spawning more servers...
And when you have less than 90% servers you shutdown few servers to lower down cost

[rich ridge]

You have wrong understanding of servers

[odd iron]

Yes because im still learning thats why its wrong

[rich ridge]

Lets consider fortnite battle royale example..
In one match 100 players play, so for epic maintains for example 1000 dedicated servers in advance and every set of 100 players takes one server from 1000 pool

[odd iron]

So how can we maintain this Pool how can we increase and decrease the servers automatically

[rich ridge]

And if at any point of time 900 servers are filled, they spin more servers to meet the realtime demand quickly

[rich ridge]

You can design such system

Or use Gamelift

[odd iron]

ok got it

[rich ridge]

Gamelift is costly

[odd iron]

yea sure its a service

[rich ridge]

And on the pricing page of gamelift the pricing which you see is for 15 days..

Be careful

[bitter oriole]

Consider how many dedicated servers you will actually need, for 95% of indies, that's just one. Do the math on your projected sales and concurrent players.

[odd iron]

I was looking to a thing Execute an .exe dedicated server so i can design something handle this

i can learn it first and when the time coming i can see the Gamelift or dedicated hosting

or using the playfab service

Stranger i tried the Advanced session it worked thanks

[rich ridge]

If you go for playfab, then it's very tight coupling of OSS and cloud server in your game.

[odd iron]

yes

i found in google a plugin called Victory24

i think i can execute a file outside the ue4

[bitter oriole]

Yeah no

[rich ridge]

.Executables are meant to get executed

[bitter oriole]

Look - do the math on how many dedis you will need concurrently. If you're sure you'll need more than 4-5, then investigate a way to spin them up or down

If not, then don't bother

[odd iron]

is it yeah or no haha

[bitter oriole]

It's a no

Just run your dedicated servers manually

You won't need much

[odd iron]

ah manually

[bitter oriole]

How many sales are you projecting for your game ?

That's kind of question 1 here

[rich ridge]

Just execute your server on Linux or windows VM. You could use linode or digital ocean

[odd iron]

well it will be on steam and google if i'm lucky enough

[bitter oriole]

That's not a sales projection

[odd iron]

i misunderstand i think

[bitter oriole]

Being on Steam gets you 500 sales on average for 1 online player on average

Assuming you have an average game

So you would need one dedicated server for that one guy

[odd iron]

yea but the game wont work until one 2 teams are ready to match

[rich ridge]

Do you mean 500$?

[odd iron]

500 copy

[bitter oriole]

No I mean 500 sales, that's kind of the average these days

[rich ridge]

Ohh

[bitter oriole]

The point is, your server architecture should reflect how many players you expect

[odd iron]

got it

Sure if i got a high average i will start using the Servers of Playfab

i can create standby and max number and create a server automatically when the players joining more

[bitter oriole]

For example we never had more than 20 online players with about 12,000 sales lifetime, so in our case, we would only have needed one dedicated server, if it was a multiplayer game

[odd iron]

it is completely multiplayer hide and seek

so its impossible to play without 2 teams

[bitter oriole]

Consider that the game may never be played then

[rich ridge]

These are really demotivational numbers

[bitter oriole]

Just saying

[odd iron]

at least 4 players 2 - 2

[bitter oriole]

4 players does not need dedicated servers

[odd iron]

p2p session

[bitter oriole]

UE4 doesn't support P2P, but listen servers

No dedicated required

[odd iron]

yes listen servers

[bitter oriole]

Then why are we talking about dedicated servers at all

[odd iron]

because i will make it just dedicated server

i wont a listen server hosted on one player's pc

[bitter oriole]

Why would you do that for 4 players ?

[odd iron]

no i mean the minimum number 4

it is 20 Max 10-10

[bitter oriole]

Okay, look, I'm sure you know what you're doing here. Just consider not using dedicated servers

[odd iron]

i will see and sure i will need your information everytime xD dont be angry

[green spoke]

Hey, I have a question about multiplayer. In my GameMode::InitGame() I'd like to block for a HTTP request.

If I don't have that data for PreLogin() and InitNewPlayer(), I won't know how to configure the player.

I'd like to avoid creating a spectator pawn and doing double initialization.

Question: If I start failing connections in PreLogin() what are my options to reconnect?

[dull lance]

Question on Array Serializers. After I Mark ArrayDirty/Item Dirty, what should happen?
This is my setup; FNetObjectIDTransform inherits from FFastArraySerializerItem

I have Logs on the Pre Replicated / Post Replicated functions but none of them are getting ran.

My array in question UPROPERTY(Replicated) FNetObjectIDTransformArray TransformArray_1; and void AMyActor::GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const { Super::GetLifetimeReplicatedProps(OutLifetimeProps); DOREPLIFETIME(AMyActor, TransformArray_1);

[dull lance]

when you say block, do you mean block the main thread?

[green spoke]

Well, yes if it's easy.

I was thinking I could also reject the requests on PreLogin until the config was ready.

The client should keep reconnecting. I wrote it up in Blueprints to start so I'm not sure what happens if PreLogin() rejects the connection.

[tranquil yoke]

@green spoke why not accept them but keep them in loading phase until you are ready ?

[green spoke]

That sounds like it could work. I don't know about "loading phase"

[tranquil yoke]

show a screen to clients, says loading or something and when you are ready then move them to a new map / move them to new location

[green spoke]

Got it. Yeah, I could do that, I was just hoping I wouldn't have to make a temporary setup.

Awesome! @tranquil yoke @stoic ore and @dull lance I see a path to the finish. Thanks for the help!

[rich ridge]

@green spoke have you heard about beacons?

Beacons was designed by epic for such use cases.

Beacons let client to only load if the server accepts the connect request.

[woeful hound]

Does unreal change the Local Role of a pawn when it gets possessed?

[rich ridge]

No

[woeful hound]

is there a way to change the local role? I have searched a little but haven't found anything

[dull lance]

Why do you need to change the local role?

[woeful hound]

I possess a pawn that already exists in the world. That pawn cannot call a Server function, to my knowledge, since it wasn't owned when it was possessed

[dull lance]

that's not how it works