#multiplayer

1 messages · Page 77 of 1

thin stratus
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That's c++ though

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I think epic at some point added some stuff for that cause they needed cloud instances to be debuggable

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But no idea how that works

peak fossil
thin stratus
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@peak fossil I posted about this already a while ago. Maybe you can find the chat via the search function

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Just search for messages from me in here and then something something projectile

peak fossil
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i think i found it

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ok i will try to replicate that, thanks! 🙂

subtle peak
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Hey I've asked this before, but haven't got any answers to it yet.
There is a mismatch between my animations on the server and on the client. No clue how to fix it.
Look at the first picture here, the trace is supposed to be traced forwards from the gun. This is playing as a client. The trace is going down in the ground.

The gif here shows me switching between the animation blueprint as the server and the client. You can see the animations are not the same. (The animation playing on the server here has the gun pointing downwards which explains the trace)
https://gyazo.com/119bd7c027efea7967b8983d6edd8032

But on the second image you can see the animations working fine in multiplayer both on the client and the server.

What is going on here and how do I fix it?

image.png image.png
Gyazo
Gyazo
▶ Play video
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There is only one variable driving the animations and its an enum containing the type of weapon. This variable is replicated and only changed through the server

thin stratus
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Can you confirm via Print Strings that the enum is indeed correct ?

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Cause in your Gif I see a replicated variable on the AnimBP

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Which would already be hella wrong

subtle peak
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The enum here simulating the client is "rifle" which should start transitioning away from that "hands down" animation

image.png
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Should there not be any replicated variables on the animBP?

thin stratus
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No

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AnimBP isn't replicated

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Those variables need to be replicated in your Character already

subtle peak
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Yeah they are replicated there

image.png
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Made all the variables in the animBP itself not replicated, but same thing is still happening with the "hands down" animation

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That animation is the "entry" state of the animation

thin stratus
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So the enum is also replicated in your character?

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Can you now print the value and ensure it's correct on server and Client?

subtle peak
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Its correct

image.png
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again you can see the trace on the side there

thin stratus
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Does that always happen or only when your server isn't looking at the client?

subtle peak
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Yeah! Ive felt like thats the case sometimes!

thin stratus
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Ensure that your SkeletalMeshComponent is set to always tick and refresh bones

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That's by default set to only do when rendered

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I can't recall the settings name but it's a drop-down menu

subtle peak
thin stratus
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Yeah you are by far not the first one that encountered this hehe

subtle peak
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I'll update my forum post with the solution too. Thank you so much

thin stratus
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No worries

subtle peak
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I thought my project was corrupted at one point there 😅

peak fossil
thin stratus
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We did that on both

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Cause our ball is shot by the client

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So we can predict it in addition to calling it on the server

keen surge
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I keep getting these warnings in packaged game, causing travel to never happen.

[2023.04.15-15.34.48:591][660]LogStreaming: Warning: LoadPackage: SkipPackage: /Game/Levels/Prototype (0xB0D9EB847E0DB048) - The package to load does not exist on disk or in the loader
[2023.04.15-15.34.48:591][660]LogLoad: Warning: UEngine::TickWorldTravel failed to Handle server travel to URL: /Game/Levels/Prototype?listen. Error: Failed to load package '/Game/Levels/Prototype'

What could be the cause since it works fine in editor 🤔 I've tried full clean and repackaging as well as absolute/relative path for server travel

peak fossil
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might be some other oversight on my part

thin stratus
keen surge
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And how do I check?

thin stratus
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Can you just do "open levelname" in the console?

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If not then it's probably not packaged

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Might need to add it to the maps you wish to package in the package settings

keen surge
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Aha wait I think I've found it already, let me retry

clever hound
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Is there something special about using SetSkeletalMesh() on server

void AClothingBase::EquipClothing(AVRPlayerCharacter* VRPlayerCharacter)
{
    if (HasAuthority())
    {
        if (Hat)
        {
            VRPlayerCharacter->HatMesh->SetSkeletalMesh(InventoryItemData.ClothingMesh);
        }
        if (Torso)
        {
            VRPlayerCharacter->TorsoMesh->SetSkeletalMesh(InventoryItemData.ClothingMesh);
        }
        if (Gloves)
        {
            VRPlayerCharacter->GlovesMesh->SetSkeletalMesh(InventoryItemData.ClothingMesh);
        }
        if (Pants)
        {
            VRPlayerCharacter->PantsMesh->SetSkeletalMesh(InventoryItemData.ClothingMesh);
        }
    }
}```
Im 100% sure that Im on the server when calling this function but it just does not want to set the mesh for the client. The mesh parts are set to Component Replicates
keen surge
thin stratus
peak fossil
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Okay so i'm debugging the "PostNetReceiveVelocity" and the velocity on that is 0, even after calling the "SetUpdatedComponent", does that indicate a replication problem or where is the "PostNetReceiveVelocity" getting the velocity from.
Never used that function so sorry for the noob questions.

thin stratus
clever hound
thin stratus
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Why would that mean the mesh replicates

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You only replicate the component that way

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That doesn't mean the properties magically replicate

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You need to make your own RepNotify variable for the mesh parts

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If you need to set multiple you should wrap them into a struct

clever hound
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Oh yeah I completely forgot to set them into the GetLifetimeReplicatedProps

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Ill try to add them there ty

peak fossil
thin stratus
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Not sure. sorry. This is really no rocket sciene

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Aka it should just work 🥲

peak fossil
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np I just try some different stuff, maybe I find my mistake.

winged badger
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What movement comp?

peak fossil
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@thin stratus but thanks for the answers, it helped!

thin stratus
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The projectile one

clever hound
# thin stratus You need to make your own RepNotify variable for the mesh parts

Ok just adding the mesh parts to GetLifetimeReplicatedProps was not enough but I got it to work with this:

void AClothingBase::EquipClothing(AVRPlayerCharacter* VRPlayerCharacter)
{
    if (HasAuthority())
    {
        if (Torso)
        {
            VRPlayerCharacter->RepNotifyTorsoMesh = InventoryItemData.ClothingMesh;
        }

And when RepNotifyTorsoMesh changes:cpp void AVRPlayerCharacter::OnRep_ChangeClothing() { TorsoMesh->SetSkeletalMesh(RepNotifyTorsoMesh); }
Is this what you ment

thin stratus
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Yes

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If you have multiple parts then maybe bundle them in a struct

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So you only need one variable and OnRep function

clever hound
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The performance would be the same if I made OnRep functions for each of them right? I only have 4 different parts

winged badger
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Replicating those componenets isnt free though

clever hound
winged badger
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No, server evaluating components for replication isnt cheap

clever hound
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Well I have to either replicate the struct or all the different parts of the mesh so in the end I will still have to replicate something

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For now Ill just keep it with different parts and call different OnReps for them

thin stratus
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Well they shouldn't be replicating the component anyway

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The replication is inside that character

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The component replication can be turned off again

clever hound
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Oh that is what he ment ok thanks

dusky yoke
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Hey guys, I want to replicate these two variables, which are compared to check if the mouse is going up, down, left or right on the screen, and then does a corresponding animation. Im struggling having this work properly on the client, what am I doing wrong?

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Event from client

image.png
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Feeding those values into the logic, an event run on owning client

image.png
latent heart
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Nothing you have there sends anything to the server.

dusky yoke
latent heart
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Well, how are you sending your mouse stuff to the server in the first place?

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"Replication" only happens from server to client, not the other way around.

dusky yoke
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Hmmm, so in this case I shouldn't be getting the variable on the client, but in the Server event instead, and then send that to the owning client?

latent heart
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The mouse stuff has to start on the owning client, surely? How does the server know what your mouse is doing?

peak fossil
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@thin stratus If your interested I found the problem: The blueprint component got corrupted by the live coding, I reverted to an old state and carefully implemented everything again. Now everything is working... that's was kinda frustrating 🥲

dusky yoke
latent heart
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np

thin stratus
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Just too unreliable

peak fossil
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Yeah looks like it... but the ball movement looks good now 😄

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When moving at high speed it's still a bit jittery, but I think that should be finde for now.

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I will look into predicting stuff in the future i guess

winged badger
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you only predict what local client caused with direct input

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for everything else you just have to wait for server to replicate

subtle peak
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How "bad" is tracing really? Is it ok to trace every 0.2 seconds on each client? Or should this be avoided? For stuff like interactions and pickups.

hollow eagle
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tracing isn't bad

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tracing is plenty fast. Do hundreds or thousands of traces every frame and maybe you'll have a problem.

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don't bother thinking about it until it gets to that point.

subtle peak
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Ah, perfect. Thank you!

dark edge
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input happens locally only

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only way server knows about it is if it's told

dusky yoke
subtle peak
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Ive seen some posts online saying blueprint interfaces do not work in multiplayer. This true? It does not seem to be firing on the client. Only the server.

winged badger
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blueprint interfaces are not affected by multiplayer

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it doesn't fire on client because you haven't called it

subtle peak
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So the message has to be called on multicast?

winged badger
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probably not 😛

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and i cant answer that, i have no clue what youre doing

subtle peak
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I’ve set it up like this “input E -> pickup event (run on server)”

winged badger
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that should not run on clients at all

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actors involved and whatever is managing your inventory

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should replicate that, no rpcs

subtle peak
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Hm, alright. I’ll keep trying. Thanks!

primal mesa
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In Unreal Engine 5, I am developing a multiplayer game where the PlayerScores variable, an array of structs (score, ID, player state), is stored in the game state. When a new user logs in via the Event OnPostLogin in the game mode, the game state is cast, and the new user is added as a player with the struct data. Each player is also assigned a unique ID.

When transitioning between levels, the PlayerScores array is stored in the game instance, and after the new level is loaded, the data is retrieved from the game instance and added back to the game state.

The problem I am encountering is that after opening a new level, the player state resets, making it impossible to track which scores and IDs belong to each player. Additionally, new player states are created when opening a new level, disconnecting them from the PlayerState stored in the PlayerScores array.

I would greatly appreciate any suggestions or feedback on how to resolve this issue.

thin stratus
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You already have the PlayerState that should keep track of the Scores

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The PlayerArray on the GameState is already handled for you

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And when traveling between maps while being on a Server you should ensure that you SEAMLESS Travel (boolean on GameMode), which allows you to use "CopyProperties" in the PlayerState to move the data to the next PlayerState.

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There is 0 need of creating yet another array of structs

primal mesa
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Thank you @thin stratus you are a legend!

spark pelican
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I have an issue with replicating a value change on a UObject within an array. I have an array of UObjects that I believe are replicated correctly (SupportedForNetworking(), GetLifetimeReplicatedProps(), and ReplicateSubobjects()). Now, I don't know if this is normal behavior, but if I change a value within the UObject and also change something within the array, like adding or moving an element, it all replicates including the value on the UObject, but if I only change the value in the UObject nothing happens.

hollow swallow
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Is chaos destruction okay to use in multiplayer? if it only plays for say 2 seconds while a rock breaks, then gets removed

subtle peak
hollow swallow
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yeah that was my thinking, they dont need to look the same really

subtle peak
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I've got my Blueprint interface a step closer to working when calling it without RPCs. Now the player picks up the object just fine, problem is, since it gets called through the client and not the server, how do I destroy the object after its been picked up?

The "Execute on server destroy actor" event does not fire when the client is picking up the weapon

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Its set up like this now, the client presses a button to pick up the weapon hes looking at, calls a interface message on that actor to be picked up.
The pickup actor then sets the new weapon on the player, spawns a new pickup of the old weapon and destroys itself.

But spawning and destroying should only happen on the server, so how can the interface message only be called on the client?

image.png image.png image.png
subtle peak
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Think I figured it out. Having an event back to the pawn and handle the spawning and destroying from there

broken grail
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Are ServerTarget not working in 5.1.1?I got this erros when packaging my servertarget: Server targets are not currently supported from this engine distribution. BuildException: Server targets are not currently supported from this engine distribution. at UnrealBuildTool.UEBuildTarget.Create(TargetDescriptor Descriptor, Boolean bSkipRulesCompile, Boolean bForceRulesCompile, Boolean bUsePrecompiled, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 733 at UnrealBuildTool.BuildMode.CreateMakefile(BuildConfiguration BuildConfiguration, TargetDescriptor TargetDescriptor, ISourceFileWorkingSet WorkingSet, ILogger Logger) in D:\build\++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 741 at UnrealBuildTool.BuildMode.Build(List1 TargetDescriptors, BuildConfiguration BuildConfiguration, ISourceFileWorkingSet WorkingSet, BuildOptions Options, FileReference WriteOutdatedActionsFile, ILogger Logger, Boolean bSkipPreBuildTargets) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 275
at UnrealBuildTool.BuildMode.Execute(CommandLineArguments Arguments, ILogger Logger) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 242
at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in D:\build++UE5\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 648
WriteFileIfChanged() wrote 0 changed files of 0 requested writes.

ember vine
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@broken grail u have to package from source

broken grail
sterile plaza
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If you're building engine from source, then you'll have to merge whenever there's a new git drop.

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You might have local engine changes, so it's not a simple drop and replace.

red musk
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I’d heard there’s a plug-in that helps implement prediction with correction into more home brew systems (not using GAS), is that true? Googling provides conflicting results

round acorn
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Anyone know why when I print a string from a BP Function Library it doesn't say server or client? It just prints "Hello"

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The BPFL is being executed by the server

sterile plaza
round acorn
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It actually wasn't causing my issue tho, afterall. I was populating arrays on BeginPlay in one BP and trying to read them on BeginPlay in another BP and ofc they weren't ready yet.

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So I put in the jankiest of all jank method for checking that the arrays were done lol

winged badger
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it has no world context to figure it out

round acorn
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I should replace this with a custom event that fires on the Complete pin in Game State when the For Each Loop is done.

image.png
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or maybe there's a way to do it with an Interface

winged badger
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or an event dispatcher? 😛

round acorn
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yeah, only done that once... need to relearn it

winged badger
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you create an event dispatcher in GS (below variables), add any payload it needs to carry as inputs

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and CallMyEventDispatcher when that for loop is done

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whatever the class that screen is from, instead does BindEventToMyEventDispatcher from your custom GS class pointer

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and when GS calls it, the handlers bound to it all execute

round acorn
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nice, lemme try that now

winged badger
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bind node has a red square pin bottom left

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you pull from that and type custom event

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that will put your handler function on the event graph

round acorn
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custom GS class point?

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pointer

winged badger
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get game state -> cast to your custom GS -> Bind

round acorn
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oh, aye, but you need an execution pin to cast from

winged badger
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note that you have 2 scenarios here

round acorn
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BeginPlay is "too soon"

winged badger
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GS finished for loop before your bind logic runs and after your bind logic runs

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in scenario 1, you need to call your handler manually, as the call was already done by the time you bound it

round acorn
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ya

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so my other logic is in another blueprint (a Loot blueprint, for stuff to interact with on the ground)

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if the GS event dispatcher fires, after the for each loop is complete (on the complete pin) I can call an event in the other BP?

winged badger
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binding event to an event dispatcher means "hey, whenever you are called, execute this event"

round acorn
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so just need to make a custom event in the Loot BP and bind it?

winged badger
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if thats what you need, keep in mind i don't know your code

round acorn
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k I need to re-read what you wrote a few times and see if I can get this

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thank you

#

So I'm still confused a little, the Bind Event to Arrays Are Done won't execute unless it has an execution logic already connected?

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Should I just put it On Tick?

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so basically it won't even run but once, and it won't consume much resource on tick?

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seems like what I did originally was make a manual dispatcher with a bool in GS that gets picked up by the Cast to GS after the arrays load (checking true/false every tick til then) and once they load it sets the bool and then on tick it stops going any further

winged badger
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each event should only be bound once

round acorn
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aye but my struggle is how to feed that execution pin on the bind

sterile plaza
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which one?

round acorn
sterile plaza
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you should call BindEventToArraysAreDone when you start doing the thing

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or begin play maybe?

winged badger
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bind event, BeginPlay is usually ok

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what starts the for loop?

round acorn
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ok so on begin play it becomes bound, and stays bound, and will eventually execute once GS does it business. that makes sense

sterile plaza
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yeah, you call BindEvent to tell the system, this is what you should call, when you call it.

round acorn
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then it just chills until GS says hey bud, it's titme

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time

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think I get it now, lemme hook it up to begin play

winged badger
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event dispatchers (know as delegates in c++ because why wouldn't we name things differently) keep invocation lists

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in this scenario, its a dynamic multicast delegate, meaning it can have more then 1 event/function bound to it and its exposed to blueprints

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the event dispatcher keeps all bound events in its invocation list (pointer to object + event Name) and calling it makes it go through the entire invocation list and execute each event/function on it once

cerulean lintel
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Hey there guys, has anyone ever replicated time dilation? Should we use a replicated notify variable for the time float or a multicast? What’s the best approach to fire it on a montage start/end notify?

round acorn
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damn I think it works like a charm

image.png
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that "Generate Name" function is yuge, and takes a moment to run

winged badger
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if its called by BeginPlay in GS, and its synchronous

round acorn
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actually, I am wrong. What takes a moment to run is creating the arrays that the function depends on

winged badger
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it doesn't matter how long it takes to run, the game will wait for it

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and there is no guarantee of BeginPlay order, so some of your BeginPlays can happen before and some after the GS loop

round acorn
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Dispatchers omg, I already love them

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no more putting silly things on Tick

winged badger
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do take note that your GameState doesn't need to know that object that binds an event to its dispatcher exists

round acorn
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right so no weird references that could break

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i'm gonna dispatch so much shit

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thanks for explaining this in multiplayer btw, it's not on topic here

winged badger
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it has nothing to do with multiplayer

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all dispatchers are local

torpid girder
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can/should i replicated a FGameplayTag?

winged badger
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yes

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note that is maps to an integer and replicates as integer

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not as whatever dot separated text you have for it

torpid girder
# 
    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Avalon")
    FGameplayTag GenderTag;

    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Avalon")
    FGameplayTag RaceTag;

    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Avalon")
    FGameplayTag ClassTag;
#

i just created the above, and thought hmm, ok the only thing i need to replicate is the ClassTag on the blueprint

winged badger
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you don't need to replicate tags that are defaults of a class

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as they are defaults on the clients as well

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only if you change them at runtime

torpid girder
#

the Class will need to be set (

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i could create multiple bases

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and then forget replication

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thank you @winged badger 🙂

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you gave me a good idea

subtle peak
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Does the HUD class persist between deaths? Or is a new one created on spawn?

little needle
#

hello guys how can i replicate GetHitResultUnderCursorForObjects's actor to server? i take it in gameplayability class so it is replicated class and i cant create replicated variable in it.

faint eagle
#

In ListenServer scenario, how do I force all connected players to connect as spectators (at first)? Currently I'm overriding MustSpectate_Implementation where I compare NewPlayerController to first local player controller, but I'm not sure that the first player controller will always be the host

lost inlet
sterile plaza
frank birch
#

client authoritative variable and/or RPC it 🤔

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every click an RPC seems like quite a spam... but I am not sure, let somebody that actually knows their shit answer 😅

mellow stag
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how would I optimize a playercontroller in a open world survival game so it's not taking up as much data

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for a dedicated server

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Anything stand out in my netprofiler?

mild lynx
#

Is there a way to hide a projectile that was spawned on the server from the client that shot it?
Reason being the client spawns their own proxy projectile so it feels more fluid if they were playing with latency.
I'm using Blueprint.

hollow eagle
#

The problem with this method is that you don't really get any way to correct the client's version of the projectile if the server disagrees with where it spawned or ended up. That's somewhat advanced ™️ network prediction territory though. Basic idea would be to send an id with the request to fire a projectile, the server's projectile keeps that id and then the client can interpolate its own projectile to the server's projectile's location once it receives a projectile with that id.

mild lynx
#

I can just make 2 projectile Proxys then. One for the client that is just visual, and the server, which is set to no see.

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I think that would do the trick

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When it comes to prediction, it's very overwhelming as somebody who doesn't know any actual programing outside blueprint.

hollow eagle
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Right - it's not something I'd recommend especially if you're just doing it in blueprint.

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What I mentioned first should be a pretty serviceable method to get started with.

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And yeah - you're just spawning two projectiles, one "fake" on the client and one "real" on the server that the owner never sees.

mild lynx
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Yeah, well thanks for this. I think I attempted the Owner no see, but didn't have the owner set at the time.

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Okay, setting Owner no see worked, and then on the client, I just set the mesh part of the projectile to be seen for their projectile.

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Now the only remaining issue I have is that the particle effect, and Decal still show up even if the server projectile is hidden. It is Delayed, and I would like to also hide those from the owner/client who shot.

hollow eagle
#

I believe SetOwnerNoSee is per-component, you'd have to set it on each. Ideally the actor wouldn't even be relevant to its owner but I don't believe that's something you can control from blueprint alone.

nova wasp
#

this is basically just a table with numbers on it per class

mild lynx
#

Is there a reason why spawning a Projectile on a Server makes it appear like it spawns much further from the point it should? Would anybody know how to fix this?

forest bolt
# mellow stag

homie, can you shine a light on me and send the docs for this profiler??

#

Does anyone know how to get visual studio properly working inside macros like UE_SERVER?

hollow swallow
#

how can i make something only run for the owner? if i use has auth to remote, it only runs for clients and the listen server cant do it themselves

faint pond
hollow swallow
#

is it is locally controlled? then the server wont run it but clients + listen server player will?

winged badger
#

it will yes

neon mango
#

Is there a built in way to know that all Clients have had a variable updated and are matching so that we can continue or server would have to manually perform this check?

forest bolt
chrome bay
neon mango
#

I do think it is not required for me like I originally thought so no need

plucky prawn
meager spade
#

we do similar for procedural generation

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clients report back when its finished loading the map, once all clients have done that, server will continue and start the game and dispatch beginplay's etc

gritty warren
#

I'm trying to do something simple - set the initial speed of a projectile based on some stats prior to spawning the projectile.

I'm having trouble doing this though. If i set it in the construction script, it gets jittery on the client side. What's the solution for this case?

faint eagle
#

are EndPlay and BeginPlay expected to be called for actors saved during seamless travel in AGameMode::GetSeamlessTravelActorList?

faint eagle
#

nevermind seems like thy aren't

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ok, now how do I make editor to start with net.AllowPIESeamlessTravel = 1? I know that you can do it in DefaultEngine.ini, but i'm not sure what the header in square brackets should be

winged badger
#

Each config entry has to have prop of the same name

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Find it, then look what class is it in snd what config specifiers it has

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That drtermines the header and which .ini

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I think its [Script.ClassNameWithNoPrefix]

faint eagle
#

it seems that simple

[ConsoleVariables]
net.AllowPIESeamlessTravel=1

worked

thin stratus
#

Des that work by now? That outright crashed for me the last time I tried it

faint eagle
#

well it doesn't crash for me so far and works as expected

#

5.1

wooden falcon
#

I have a dedicated server running on an Azure virtual desktop and while everything in the game works just fine, movement and rotation are a bit laggy (playing as a client in unreal works just fine)

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I tried deleting performance heavy actors but nothing changed it looks like it’s an issue not caused by connection/performance

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Any suggestions/help?

mild lynx
#

For EOS, do you have to create a project in C++?

cerulean lintel
#

Is this supposed to be called on Client & Server? DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnClearTarget); UPROPERTY(BlueprintAssignable) FOnClearTarget OnClearTarget; OnClearTarget.Broadcast(); Or am I missing something?

lost inlet
cerulean lintel
#

Ah okay

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I know about server reliable functions, but I needed C++ to call bp replicated

lost inlet
#

Then you need a multicast RPC, which might be confusing because of the shared terminology

cerulean lintel
#

This made me a bit confused

#

https://forums.unrealengine.com/t/how-are-event-dispatcher-in-blueprints-replicated/507065

Epic Developer Community Forums
How are event dispatcher in Blueprints replicated?

On an Event Dispatcher, you can set Replication to “Replicated” or “RepNotify” and conditions. These settings are usually on Properties(C++)/Variables(BP). An Event Dispatcher, in my mind anyway, is more like a RPC(C++)/CustomEventNode(BP). It’s a function delegate/event that gets called and then triggers on the recipient. You mark them as rel...

lost inlet
#

You would need to make the function with the Broadcast() call a NetMulticast UFUNCTION

#

There's nothing replicated about event dispatchers

cerulean lintel
#

Gotcha

#

Thanks

boreal wadi
#

Has anyone ever changed the owner of a dormant actor and it no longer fires rep notify events?

I have a weapon that is dormant and whenever something is updated I flush the net dormancy. Before changing its owner everything works perfectly after a new owner is set and the weapon is equipped (Which is a rep notify variable) the rep notify doesn't fire. So all of the client sided logic like showing the mesh or linking the animation layer never runs.

nova wasp
#

I'm definitely no expert but I imagine the net owner changing might not reroute the repnotifies after the fact

boreal wadi
nova wasp
#

why does the owner have to change when they spawn in?

#

you could maybe avoid destroying the actor connection

boreal wadi
#

But then I dont get the benefit of owner net relevancy since those actors are always relevant.

nova wasp
#

you can control net relevancy yourself

#

mind you, there may be some other more simple solution

#

Definitely much more experienced people on here for mp stuff than me

boreal wadi
#

Simple solution is just to destroy all the actors and spawn them back in when the player controller possess a new pawn. Its just not the most optimal since a player could spawn and die OFTEN ... If they trash lol

#

Welp, just found out that it wasn't working because while debugging the rep notify was getting missed. When just playing and dying and respawning everything is working as intended

nova wasp
#

is it the the breakpoint making it time out if you freeze the exe? 😮

#

scary

#

I know that some things that rely on platform time will get weird with that

boreal wadi
#

Not sure actually. I keep running test, each time is different. Once I died with my ability out and came back, my primary weapon fired the on rep. Another died with my secondary out after just using my ability I came back with no weapon but was in the state of selecting an ability target area. lol I did however find out that if I manually equip a weapon like by hitting the key that weapon slot is on or the scroll when the on rep will fire. So my guess is its a time based thing but I'm not really certain

upbeat basin
#

In order to disable input, let's say for the end of the game, is the only way using a multicast RPC to call DisableInput on every client locally? This feels like trusting to client which doesn't.. sound safe. Am I missing something here?

small grail
upbeat basin
#

How do we do the server doesn't accept client's input part?

small grail
upbeat basin
#

Okay but this is for straight server RPCs. What about CMC, do we have control over that as well?

small grail
upbeat basin
#

Character movement component

#

Like, we're not sending WASD or mouse inputs over RPCs right?

#

There are functions to move the character and rotate the controller to make the pawn rotate as well

#

Can those be disabled with validation as well?

small grail
dark edge
upbeat basin
winged badger
#

to make it unhackable?

#

unpossessing might work

upbeat basin
#

Yes that can work, thanks

thin stratus
#

I mean, if you can call Unpossess, then you are on the Server

#

So you can set some flag on the CMC

#

Or change its MovementMode to None

upbeat basin
#

My concern is disabling input completely for a user, not just movement. Like DisableInput. I asked "what about CMC" because I was suggested to use RPC validations in order to see if I should accept the input or not. Since both unpossessing and using DisableInput prevents all inputs from that actor, character for the case, it seems suitable to me

thin stratus
#

Unpossess and DisableInput are two different things though

#

You can't possess on the Client

#

But you can EnableInput

#

So they aren't equal in cheat protection fwiw

#

If possess is fine for you, then do that

#

Or unpossess fwiw

upbeat basin
thin stratus
#

I don't think so. Let me double check

upbeat basin
#

So I guess unpossessing is the closest that I can get to that logic, assuming all my inputs are in the character

thin stratus
#

You have SetIgnoreMoveInput

#

On the Controller

#

That ultimately gets pushed through until the MovementComp

bool UPawnMovementComponent::IsMoveInputIgnored() const
{
    if (UpdatedComponent)
    {
        if (PawnOwner)
        {
            return PawnOwner->IsMoveInputIgnored();
        }
    }

    // No UpdatedComponent or Pawn, no movement.
    return true;
}```
#

But not sure it's actively used

#

It controls locally if the Pawn can AddMovementInput

#

But probably not on the Server

#

You could use it in your own CMC though

plucky wedge
#

Hello everyone, I have a question that is kinda very specific. I am currently working on a project with some custom split screen for 5 players (but I guess this does not really matter). The case is that we have local multiplayer and split screen. There are some different widgets on each screen. And there is an issue with a touch. We are using 5.1.1 version and the touch does not work in standalone mode or in package. However it works normally when running it editor (PIE). One person tested it on other engine versions and it also does not work on 4.26, but it works for example on 4.23.
Does anyone ever have such case and might know what is going on.

In the picture, only top-left one button is clickable

image.png
small grail
#

There're always tricky ways to make the thing work sweeney_activate

lime skiff
#

If I'm only interested in Server->Client replication of sub objects, it is enough to call AddReplicatedSubObject() and RemoveReplicatedSubObject() on the server, right? ReplicatedComponentsInfo on an actor doesn't seem to be replicated also.

latent heart
#

There are guides for replicating subobjects around.

#

https://forums.unrealengine.com/t/how-do-you-replicate-a-uobject/355264/4 like this one

Epic Developer Community Forums
How do you replicate a uobject?

To replicate UObject, instance must have owner (AActor), who can replicate this. AActor must have next functions (You can use AGameState for storing items) virtual bool ReplicateSubobjects(class UActorChannel *Channel, class FOutBunch *Bunch, FReplicationFlags *RepFlags) override; virtual void GetLifetimeReplicatedProps(TArray& OutLifetimeProp...

quartz star
#

im facing a big problem rn, i have a character who can shoot a projectile but after he spawns the projectile i make him possess that projectile so he can control it (turning left/right) and after the lifetime is over or the projectile hit something i want to possess the character who shot the projectile again.

it works fine on the server, but now on the client i got the problem.

  • the character doesnt stop moving after possessing the projectile
  • when the character gets possessed again he takes over the last rotation of the projectile and also he gets teleported back to the location where he shot that projectile (so if he moves while shooting the projectile , he will continue moving forward until he gets possessed again, and then he teleports back)

but i only have that problem on the client
can someone help me?

latent heart
#

Return of the Redeemer!

#

When you say doesn't stop moving, do you mean that they carry on in a straight line from what they were doing? Or that they still respond to the client's controls?

quartz star
latent heart
#

Sounds like it's not receiving the "key up" events because you stop possessing it.

#

Do you do your movement input on your character class?

quartz star
latent heart
#

That might be why.

#

I'd check your logic.

quartz star
#

i can control the players speed with "W/S" when i press W it increases the maxwalkspeed and when i press S it decreases the maxwalkspeed
and in the even TICK i do "Add movement input value = 1"

quartz star
latent heart
#

That'll be why then.

quartz star
latent heart
#

Good question.

quartz star
#

i simply use "add controller yaw input"

#

so when it possesses the player again he takes over the last rotation of the projectile

latent heart
#

So store the control rotation and reset it when you posses teh character again.

quartz star
#

as far as i know i can only get the control rotation but not set

latent heart
#

Shrug

quartz star
#

but still the rotation makes me crazy

#

it just takes over the control rotation of the projectile

#

i have never seen that before to be honest

latent heart
quartz star
winged badger
#

Pretty sure you need editor for rhat

#

But if you want shitty internet just connect you pc wirelessly over mobile hotspot

spark pelican
#

I have an issue with replicating a value change on a UObject within an array. I have an array of UObjects that I believe are replicated correctly (SupportedForNetworking(), GetLifetimeReplicatedProps(), and ReplicateSubobjects()). Now, I don't know if this is normal behavior, but if I change a value within the UObject and also change something within the array, like adding or moving an element, it all replicates including the value on the UObject, but if I only change the value in the UObject nothing happens on the client.

winged badger
#

what is your test case for this?

queen escarp
#

why cant ppl join my dedicated server ?

#

ive opened ports and all

winged badger
#

first, dedicated server doesn't do OnClicked

#

or has any kind of UI

queen escarp
#

hm maybe its not callled dedicated server 😛

winged badger
#

second, you're not joining a dedicated server from 2nd event, you're telling them to open the level themselves in listen mode

queen escarp
#

hmm but it works if i use 2 clients on test ?

winged badger
#

joining someone else doesn't happen with open level

#

most common technique would be creating session on host, then finding and joining it from client

#

most basic one is ExecuteConsoleCommand open ip:port

queen escarp
#

hm

spark pelican
winged badger
#

i meant if you're testing it from OnRep_InventoryArray

#

the pointer to your UObject doesn't change because a value in it changed

#

so it would have no reason to fire

#

array remains exactly the same

#

if you're using c++ i strongly suggest using a FFastArraySerializer instead of TArray, replicate structs with item data and create UObjects locally on server/clients

#

its capable of individual per item callbacks for add/remove/change

spark pelican
winged badger
#

NetSerialization.h header has the docs for it

#

or did in 4.27

solid hawk
#

so yeah i'm having an issue that's breaking my patience on my online multiplayer racing game where when i try to teleport a vehicle that goes out of bounds back to the track an invisible actor spawns in the place the vehicle was teleported, but it only affects other players, the thing is, i can't see what that actor is even if i unpossess the vehicle during gameplay, also tried to use a trace by channel thing and nothing

#

ik it's rare to have help in here (not blaming anyone) but yeah just ping or dm me if you have some help

quasi tide
#

ik it's rare to have help in here
Well - that's one sure way to encourage people to not help you.

prisma snow
solid hawk
#

i'm just annoyed, don't take it personally

icy jetty
solid hawk
#

2 days trying to fix this

quasi tide
# prisma snow I've seen worse

I was reading through their problem and was like, "Okay, well let's try this". Saw that comment and was like, "Nah. Nevermind."

solid hawk
icy jetty
#

Eh, you break your head over something for 2 days, it can get very frustrating lol

solid hawk
#

yeah, thanks for understanding and helping

icy jetty
#

So you get a random actor spawning at the origin or at the destination?

solid hawk
#

at the destination just like the vehicle

#

however it does not affect the player that was teleported, it only affects the other clients

#

and yeah if another client gets teleported (goes out of bounds) all the other clients get affected besides the one that caused it

#

it spawns like a invisible small object

#

at least from the collision it seems like it

icy jetty
#

Hmm, could it be just a box collision @solid hawk ?

queen escarp
#

and i can join with 2 clients from my pc atleast :/ ?

solid hawk
#

it's what i've been trying to figure out, i tried to add a trace by channel node in a event tick to see what would output from it

#

and nothing

icy jetty
#

Does your vehicle have a box collision component?

solid hawk
#

it does have more components besides the base mesh yeah, a character riding the vehicle (which has no collision) and a fork that moves up and down (it's a forklift xD)

#

it's just weird i can't see it both in player collision view

cerulean lintel
#

hey there, quick question guys. If we need a replicated blueprint event to be implemented, would the approach be something like a repnotify that calls a multicast delegate? Or is there a better approach for this?

solid hawk
#

anyway, thanks for your help, if you have any more ideas please tell me

icy jetty
#

Could be, I’d try to play around with each component on the vehicle that could cause a collision and see if you can narrow it down maybe

#

Like temporarily disable its collision and test or something along those lines

#

But yeah, replication is a likely culprit

quasi tide
# cerulean lintel hey there, quick question guys. If we need a replicated blueprint event to be im...

There is no such thing as a replicated BP event. An event is either an RPC or not.

That said, I believe what you're asking is about an Event Dispatcher (which is also not something that is replicated).

As for using Onrep or not - it is quite straightforward:

If you need STATE to be sent to clients (IE - "the character's mesh should be this"), then you use Onrep.
If you need STATELESS to be sent to clients (IE - "this one-off sound should play"), then you use an RPC

#

If you want to call a multicast delegate inside of your Onrep or RPC, that is completely up to you.

cerulean lintel
dark edge
#

You'll find yourself using RPC mostly for cosmetic stuff

cerulean lintel
#

I don't really need to send the bool, just toggle on/off so I'm guessing maybe not stateful

spark pelican
dark edge
#

whether or not you're orienting rotation to movement is stateful

#

whether or not a sound got played is not

#

but you better learn the CMC in and out if you're doing anything wacky. It does things different

cerulean lintel
#

I see okay

#

yeah, possibly a custom CMC would help covering all edge cases for things like that

olive kraken
sterile plaza
#

$350 plugin, interesting

#

I'm curious if something like this would be of any value at work. Probably not.

#

on that note: when is epic putting out their new and improved movement component?

olive kraken
#

The more I deal with network + CMC the more I'm noticing issues, so I'm in a desperate journey of finding a solution

sterile plaza
#

someone at work was talking about this... years ago, when they were trying to get GAS and movement to play nicely over the network. Some bug or limitation in the current movement component precluded it.

#

I don't know if this was announced, or something they said to my coworker over email or what.

olive kraken
#

Yeah, I believe nothing is coming short term, more than extra spegatthi related with Iris

#

at least judging by the source code diff

#

Hopefully, one day...

winged badger
dark edge
#

I'd be interested to see if it's just a more generalized CMC or if it's actually doing something drastically different

olive kraken
#

Trying to find more reliable ways of replication root motions with rotations, I still have an annoying bug in Vanilla CMC causing teleporting overtime

#

so, yeah, saw this and I might consider

graceful flame
#

I'd also be interested in seeing a video of someone who bought that GMC plugin and can show what it looks like with the "bad" simulated network lag profile set to everyone.

quasi tide
#

For what its worth - this plugin also has WizardCell's stamp of approval

quasi tide
#

Also, do note - they are planning for a pretty major update with the GMC plugin.

river coral
#

Kinda like a free GMC Lite alternative

marsh gate
#

I need to find that YouTube video (State of Unreal I think) where an Epic Games developer presents the Replication Graph and how it is used in Fortnite. It was a very interesting talk presented I think 3 years ago. I can't find it on YouTube. I don't know if it was GDC or it was an Unreal event, but I am 90% sure it was an Unreal Event.

Anyone know where I can find it? It was pretty big, people here definitely saw it. Surprised it's taking me so long to find that video on the internet.

I found this one, but this is not it. This doesn't introduce Replication Graph https://www.youtube.com/watch?v=KHWquMYtji0

YouTube
Unreal Engine
Optimizing UE4 for Fortnite: Battle Royale - Part 1 | GDC 2018 | Un...

Fortnite has served as a development sandbox for UE4, and in this presentation from GDC 2018 we explore the effort involved with taking FNBR from 30fps to 60fps on consoles.

Learn more at http://www.UnrealEngine.com

▶ Play video
fathom aspen
# marsh gate I need to find that YouTube video (State of Unreal I think) where an Epic Games ...

You are looking for this one: https://www.youtube.com/watch?v=CDnNAAzgltw&ab_channel=UnrealEngine

YouTube
Unreal Engine
Networking in 4.20: The Replication Graph | Feature Highlight | Unr...

Working on a multiplayer game? Are there many players in-game together? On this livestream, our networking team will demonstrate 4.20's new Replication Graph Plugin and the server optimizations that were implemented for Fortnite Battle Royale.

NEWS

Unreal Engine Drives Monster Puppet for The Mill and Monster.com
https://www.unrealengine.com/...

▶ Play video
#

It was really just "replication graph unreal engine"

fluid summit
#

Hi everybody! does anyone know if when you are running a listen-server setup, if the server disconnects is it possible to transfer ownership to any other client at runtime?

ForExample: Diablo 2 on unreal engine. I'm the Server and my 2 friends are clients. If I disconnect I want them to continue their multiplayer session normaly.

hollow eagle
#

Not without a pretty massive amount of work.

small grail
fluid summit
#

its okey. its not neccesary at all. just a nice feature if it comes out of the box

dark edge
#

It's basically the same as saving game, disconnecting, starting new session, resuming

#

Idk enough about sessions to know if clients can be aware of each other in them but you'd want some protocol to decide order of succession etc.

plucky wedge
#

Does anybody know if it is possible to animate the screen (mainly size) for local multiplayer when removing or adding the players? I assume this is not possible directly from UE, but changing source code is an option. Because by default when we are removing local players or adding them the change is done immediately

gloomy drum
#

Guys I am using OWS and on Unreal V 5.2 it's giving this

image.png
jagged aurora
#

Hey guys, has anyone had an issue with connecting packaged Unreal Engine build to a session hosted in the editor in PIE mode?

winged badger
#

or you're using rider and it ninja included something it shouldn't had

neon thistle
#

My server's pawn automatically unpossesses even without the code in my game mode, which I later added so he would spawn and possess another pawn which works for the client but the server just remains unpossessed.

Screenshot_1256.png
winged badger
#

whenever your server function is called

#

its Target pin get a new value

#

so if your client logs in before server/host delays have passed and it spawned

#

the Target pin has a reference to client PC

#

PostLogin is server only event, so it doesn't need a server RPC

#

nor does anything executed on GameMode since clients don't have one

#

Delays for init are generally pretty bad

#

you don't need to destroy previous Pawn explicitly

neon thistle
#

i think my server doesnt have a player controller

#

because i searched for it through the level

winged badger
#

Possessing a new Pawn automatically Unpossesses the last one

neon thistle
#

but there is only one

winged badger
#

if its a listen server, it does

neon thistle
#

it is but i dont see one in the search

winged badger
#

if its a dedicated server then thats expected

neon thistle
#

no its listen only

winged badger
#

also, your outliner has to be in server mode

#

for you to see 2 PCs

#

they are replicated to owner only, so host has 2, client only has its own

neon thistle
#

how do i put it into server mode

winged badger
#

illuminati eye bottom right of the outliner

#

at least on UE4

neon thistle
#

theres only one both ways

#

toggle on or off

#

thats why the server unposses

#

when the client spawns

#

because client takes over the PC

winged badger
#

it doesnt

neon thistle
#

idk i still havent figured it out

rare blaze
#

hy i have a doubt, im complete beginner in this just learning stuff so i was just randomly thinking had this doubt there are so many videos on yt which says multiplayer they make the game but how do they uk setup a server so that my friends can play a built version of the game

tardy fossil
#

is it hard to make a custom movement system and have it work with the default replication? I'm trying to port over my movement code but its stateless and doesn't fit with how unreal does movement with PhysWalking states ect. I tried to override StartNewPhysics function in my movement component but that seems to break the proxies

quasi tide
rare blaze
quasi tide
#

Probably

ivory bear
#

Is a "Transition Map" an actual Level ? For seamless travel.

chrome bay
#

yes, usually a very lightweight/empty one

twin juniper
#

but still a level yeah

gloomy compass
#

hi guys do we need source code for sure?

#

to do multiplayer ?

#

in unreal 5 or 5.1

graceful flame
#

Yea you need a source build if you want to use dedicated servers.

#

But not for listen hosted games.

gloomy compass
#

what listen hosted ?

#

i didnt get it

ivory bear
#

So, I added a string print to the servertravel node and it prints out "server traveling!" but I see this on the client that joined the game, not the client that hosted (play as listen server) the game.

rare blaze
quasi tide
#

You can google this

rare blaze
dark edge
steel vault
#

Hmmm just tried a normal character launch and I'm seeing a lot of net corrections, possibly because of the speed of it? Is it better for me to create my own custom launch instead to avoid the corrections? I would think that Launch shouldn't be correcting out of the box at all...

#

Toned down the strength, and it still has immense corrections at the beginning when trying to launch on client and server.

graceful flame
# rare blaze are there any free ones, also whats a dedicated server

There are few ways to achieve a "free" multiplayer game setup. But none of them are perfect.

  1. Use listen server. One of the players becomes the server. (Makes it easy for cheaters.)
  2. Use p2p networking. (not really supported by Unreal Engine without lots of customization)
  3. Use your own dedicated server than you have the actual hardware for. (Example: an old computer)
  4. Design your game in a way that you let the community host servers themselves. (Rust for example)
  5. Carefully stay within the free-trial tier of a cloud provider with hard billing limits setup (will run out of free credits eventually).
#

But if you want the best performance and least amount of cheaters you have to rent dedicated servers.

rare blaze
#

so started googling it

rare blaze
queen escarp
#

after doing a Level Travel my main Client´s character cant attack ppl or anything but the other clients can

#

is there something im missing with level traveling that could affect it somehow :/

#

its the client that initiate the servertravel that getts bugged somehow :/

pseudo merlin
#

hi all, is it possible for a client to keep ownership of a pawn they no longer possesS?

#

my client can swap between pawns, but id like them to still call RPCs on their unpossessed pawns

#

I see pawns UnPosess function calles SetOwner(nullptr), maybe thats what I can change

quasi tide
#

Yes. After the unpossession happens, you'd do a server rpc to transfer ownership back

#

Possession/UnPossession transfers ownership.

#

So you can either do what I said or change the source code. (I don't recall if possession/unpossession is virtual or not. If it is, makes it easier)

pseudo merlin
#

so I'd have client request ownership once they lose possession?

quasi tide
#

Pretty much

pseudo merlin
#

nice, thanks

queen escarp
#

so this is just after a server travel the client 1 cant affect others but the 2nd client works as supposed to ?

#

what could cause this im tottaly lost .O

ivory bear
queen escarp
#

@ivory bearwell a widget from the playerchar_Bp start the send and the gameinstance is doing the transfer really

#

this is everything related to the travel

#

@ivory bear any ideas ?

#

its like the first client is not on the server somehow

olive kraken
#

Getting a save object or the game instance from a player controller in a multiplayer game, will always give me the local client save object and instance, regardless if I'm server or client, correct?

fathom aspen
#

Right. It doesn't automagically travel to the other side and bring that object to you

olive kraken
#

Thanks. I was getting paranoid of why client didn't save an struct, just noticed the save game happened only on the controller server side, which I guess translates in nothing saved locally in the client machine

olive kraken
#

Got another question, any techniques or good practices to fire a repnotify from an array change? either by adding or setting members?

vivid seal
#

You can use FastArrays for that

#

Per-item callbacks: pre-remove, post-add, post-change

cerulean lintel
#

If we use a delegate and broadcast it (C++) inside a repnotify, should it call the event on all clients ?

sterile plaza
#

Replicating a variable that goes to all clients and has an OnRepNotify that calls a delegate, works on clients.

#

Should be quick enough to set up and test.

lost inlet
#

if the OnRep is C++ then you should manually call the OnRep function serverside

#

BP silently does this for you

cerulean lintel
#

Gotcha, I just wanted to know if this is a possible approach, probably not replicating for some bug here then, I’ll double check it

cerulean lintel
#

That is probably the issue then

#

Thanks

sterile plaza
#

what behavior are you seeing @cerulean lintel ?

lost inlet
#

if it's ROLE_Authority then you'll want to manually call an OnRep in C++

#

since you're authority, there's no replication happening, so therefore no automatic OnRep call

sterile plaza
#

mmm, depends on whether you want it called on a dedicated server vs listen server

cerulean lintel
cerulean lintel
sterile plaza
#

yes, listen server won't get OnRep calls and you'll need to call it manually
do you want to call it on dedicated server?
checking for ROLE_Authority is going to return true for both of those

#

assuming it's some actor that the server owns

cerulean lintel
#

I want it to call on listen server and clients, it’s a toggle for on/off rotating to target

sterile plaza
#

ENetMode might server you better than ENetRole

#

rotating what to target?

cerulean lintel
#

Character

sterile plaza
#

why are you doing that on the client?

#

why not do it on the server?

cerulean lintel
#

I wanted to trigger the rotate to target event inside the notify

#

Does this really need to use network bandwidth to trace on server? Or can I just repnotify the active target

sterile plaza
#

I'm not sure I understand what you're asking.

#

Traces on the server don't use bandwidth.

cerulean lintel
#

The trace function is not a server function, is a local regular function

#

But it sets the repnotify variable

#

Which holds the delegate I want to broadcast to all

sterile plaza
#

let's start over
What is it you're trying to do? Then I'll tell you how I would go about doing this. Then we can figure out where our approaches differ and talk about them.

cerulean lintel
#

Ok, so basically I have a regular function (not replicated) that traces and based on the result sets ActiveTarget (Repnotify)

#

This one is replicated

sterile plaza
#

nope, don't talk about code
tell me about the gameplay you're trying to do

cerulean lintel
#

Ah

sterile plaza
#

I think you're doing work you don't need to do.

#

at least that's my theory :P

cerulean lintel
#

I have a target system component attached to the actor

quasi tide
# 
void ASomeActor::SetTargetActor(AActor* NewTarget)
{
    TargetActor = NewTarget;
    if (HasAuthority())
    {
        OnRep_TargetActor();
    }
}

This is the general flow

cerulean lintel
#

It is supposed to change bOrientToMovement and other booleans of character movement true/false depending if there’s a valid target

sterile plaza
quasi tide
#

If you want the client to be more authoritative, you'd do a server rpc to set the target actor. Then the server would just call SetTargetActor

cerulean lintel
sterile plaza
#

so each player has a targetting component on their pawn

cerulean lintel
#

Yeap

sterile plaza
#

ok

cerulean lintel
#

I’m trying to replicate clients looking at their targets, player and players proxies

sterile plaza
#

how does the targetting component get a target specified?

cerulean lintel
cerulean lintel
quasi tide
#

Vinny, really going to need you to learn the terminology mate. It is quite important to be able to communicate.

#

You don't replicate a notify

cerulean lintel
#

I mean the variable holding the notify sorry

sterile plaza
cerulean lintel
sterile plaza
#

I'm not asking about the code. I want to know about higher level stuff.

quasi tide
#

OnRep Notify is just a function that gets called when a variable is replicated. It is only called locally.

sterile plaza
#

is the player doing it? on tick?

cerulean lintel
quasi tide
#

Clients will call this function, regardless of being in BP or C++.

#

Server will not.

sterile plaza
#

so a player presses a button, then their targetting component... shoots a trace to see if they're aiming at anything?

quasi tide
#

It is always called in BP, but in C++, the server has to call it manually

cerulean lintel
quasi tide
#

So - if you change the variable on the server, you must call the OnRep function by hand (as I showed)

#

But, clients will call that function when they receive the updated value.

#

However - the OnRep will not fire on clients if the value did not change.

sterile plaza
#

okay, which might hit an actor? another character? if so, you want all the other clients to know what it hit?

cerulean lintel
cerulean lintel
#

Instead using delegates

sterile plaza
#

I'm just trying to figure out where information comes from, and who needs it.

#

I wasn't worrying about implementation details yet.

#

I can't debug what you're doing and where it's going wrong, if I don't know what you want to have happen.

cerulean lintel
#

Sure, no problem

sterile plaza
#

all that said, assuming I understand, then I think your approach is reasonable

#

choosing a target does seem like a client auth thing

cerulean lintel
#

It’s just that I haven’t seen so far examples on “broadcasting a delegate inside a repnotify function” so I was confused if this approach is wrong

sterile plaza
#

I call delegates inside repnotify all the time.

quasi tide
#

There doesn't need to be an example. OnRep functions are just regular ol' functions

sterile plaza
#

if you're new, it's hard to tell what things are the same. :P

quasi tide
#

You'll end up doing delegate broadcasting quite often for UI stuff

sterile plaza
#

yep

cerulean lintel
#

Gotcha, yeah, if this is fine

#

I’m totally down to it

#

I’m a bit new to replication yeah, not UE particularly

cerulean lintel
#

I’ll try out your suggestion snippet @quasi tide thanks!

sterile plaza
#

Do you need it to be called if the value didn't change? Or was that a red herring in debugging?

cerulean lintel
#

I have two delegates for target set and cleared

#

But if the ActiveTarget won’t get replicated if it’s a nullptr

#

Then I’ll probably handle that in a boolean

#

Or check replicate condition

sterile plaza
#

so it's not that ActiveTarget isn't replicated if it's null
it's that it won't get replicated if it doesn't change

#

could you use one delegate instead of two?

cerulean lintel
#

Yeah

#

As long as I can warn the character to adapt to that event

sterile plaza
#

I would use one delegate that is OnTargetChanged or something like that. Let consuming systems handle null however they want.

#

I'm guessing clients don't need to do anything if the target doesn't change. But I suppose it could.

cerulean lintel
#

So doesn’t matter if it turns at some point to a nullptr will still get replicated

sterile plaza
#

if it's nullptr and I set it to 1 then it will be replicated
if I set it to 1, no replication
if I set it to nullptr, replication

#

if you don't need to do anything if it didn't change, you could optimize by checking client side if it didn't change before you inform the server

cerulean lintel
cerulean lintel
sterile plaza
#

I also recommend you test everything with "play as client" and not just standalone/listen server. It can be easy to take shortcuts for the host player and not realize it and then you have things the host does properly, but clients don't.

#

I've found implementing for "play as client" first forces me to address the hard parts, leaving me with the easy work of making sure it still works with listen server (for the OnRep oddities we've discussed here).

cerulean lintel
#

Gotcha

#

Alright

#

Thanks for the tips, got a path to try new things now

sterile plaza
#

awesome

#

sorry if things were a bit more in depth than strictly necessary
it's always a bummer when you spend a bunch of time telling someone how to replicate a thing in some specific way only to learn they should have done ALL of it on the server and none of it needed to be replicated

#

:P

cerulean lintel
#

No worries haha I know there are many ways to achieve the same result but with different objectives so it does make sense

mental linden
#

Hello, where would be the ideal place to put my API calling code to initialize character data? For instance, my API has the information like, character stats, current inventory etc.

Should I use one of GameMode functions to retrieve the data first, then spawn my pawn with the retrieved data?

Does anyone know the best practices?

small grail
mental linden
small grail
mental linden
#

I wish there is a better documentation somewhere, there are many methods in gamemode that can be overriden.

#

I think I will go with HandleStartingNewPlayer for now.

lost inlet
#

Listen server host and dedicated server (the actual headless process running on a server) BOTH need manual OnRep calls after setting a replicated variable

#

On a listen server host there's no replication happening to the playing host. ReplicatedUsing calls depend on the replication system on the C++ side. Blueprint can handle that bit of boilerplate on its own

#

Checking net mode in some cases can be perfectly valid, you'd check against NM_DedicatedServer for if you wanted to spawn VFX or audio for example

sterile plaza
#

True. I was more thinking that some OnRep don't need to go to the server. UI stuff for example. Agree on everything though.

queen escarp
viscid tapir
#

I have different functions in my shops, like "BuyRandomCards","SellCards" (cards are items basically). And I want to RPC from a button in my widget so i need to cast an object that i own like PlayerController..

I think I got it but.. That would mean creating for each shop function a matching replicated event ?

#

Its fine i have like 10 functions but it looks like awkward

late wind
#

Hi! I have a out of the box multiplayer character which works perfectly well(rotates with controller yaw which is tied to camera controller)

#

now, i wanted to add some pitch and roll to this character, and i did this by updating the pitch and toll of a mesh

#

*roll

#

but this does not work well on remote proxy (seems like the mesh rolla and pitch get rotated, but immediately go back to zero value in the next frame)

#

any way to work around this?

chrome bay
#

It won't work because the network smoothing blends the mesh back to it's default rotation.

#

You can't really add pitch or roll to the default character implementation easily, it's designed to be an upright capsule that rotates on Z only.

late wind
#

hmmmmm

#

but it's only a visual representation

#

can i work around it somehow( rotate bone, or perhaps rotate a controller instead of a mesh)

tired mortar
#

hi guys, i just found out that if i have an Actor that is not replicated and i attach it to a Character's component that is replicated, the actor will move with this component and its movement is replicated to other clients...
How can i avoid this behaviour?

chrome bay
#

You can rotate via an animation sure

#

Just not the character mesh itself

late wind
#

@chrome bay if i rotated controller pitch and roll and set the actor to inherit pitch and roll(just as yaw is inherited by default), do you think it could work?

chrome bay
#

No as the character pawn doesn't do anything with those

tired mortar
#

Actually i'm using the VR Character of VRExpansion plugin

#

And the "problem" is the GripMotionController component

#

When i grab an object, i attach it to this component

thin stratus
#

@grand kestrel I just realized and encountered that damn TImestamp reset on the CMC

#

Client of mine has a short 0.2 cooldown between 2 activations of a boost. The code was checking if the BoostCooldownTimestamp and the CurrentTimestamp results in a remaining cooldown of > 0

#

If the cooldown was triggered before the reset (e.g. 235 timestamp), and the next check would be after the reset, it could be that the function reports remaining time of e.g. 150

#

Cause CurrentTimestamp is then suddenly less than BoostCooldownTimestamp

#

We now added a check if similar to how the CMC does it to check if there was a reset and then adjust the math.

#

Might be worth keeping in mind for the CMC Repo

queen escarp
#

ok so i still have the bugg it not related to the servertravel but its from the start when i join with 2x clients the "host" client is not affected by others and can interact with other !?

thin stratus
#

@queen escarp Relatively sure that's almost impossible for us to debug, because that is probably a bug in your code

queen escarp
#

you but ive searched thru the web for a solotion or any tip or whatever but cant find it , it works if i have 4 friends joining theyre clients works fine (character) just the hostinging one cant interact with anything really

#

idnno how i should troubbleshoot it either really

thin stratus
#

Yeah then you have somewhere a code that specifically checks for Authority and Remote and only works for Remote

queen escarp
#

i do have 1 of those

#

but it should not affect :/ ?

#

since it dose nothing*

thin stratus
#

You really only have one SwitchHasAuthority in your whole project?

queen escarp
#

well i just started my project 2 weeks ago so yeah i think so

thin stratus
#

Hm okay

#

What does all not work?

#

Can the Host take damage?

#

Can the Host deal damage?

queen escarp
#

yeah

#

nope

#

collisions are turned of

thin stratus
#

And the Clients can Take and Deal damage?

queen escarp
#

yeah

thin stratus
#

And your Damage code isn't doing anything that would stop the host from performing the damage?

queen escarp
#

also this is really suspect sec

#

nope same on everyone

thin stratus
#

Then you need to start placing Print Strings into your functions

queen escarp
thin stratus
#

And see where the Server stops execution

#

You can't debug this by just repeating the bug

#

Also both of these are Clients

queen escarp
#

yeah

thin stratus
#

When you say "Hosting Client" do you mean the one that has a Dedicated Server running on its PC as well?

queen escarp
#

and it can only be seen on 1 client the effects etc

thin stratus
#

Or just that it's the first one that joined?

queen escarp
#

server running on its pc aswell

thin stratus
#

But this also breaks in the Editor or?

queen escarp
#

dont have dedicated server playing thru "lan" i suppose ?

#

the thing is if i start a level with 2x clients everything works, but if i start form the "main menu" where i connect one client to the other(host) then the host is bugging i suppose

thin stratus
#

Are you testing this in the Editor?

queen escarp
#

yeah like in this chase if i start at the "specific map" with both clients it works as intended

#

ive tested both editor/built

thin stratus
#

Editor could be a bit strange

#

Because if you start in the MainMenu

#

And you select PlayAsClient

#

Then your Clients are already connected to the Server or not?

#

But if the same happens with a Packaged Server and Client, then nvm

queen escarp
#

oh

#

true

#

but if i test as a "standalone game" then that should simulate playing with others right ?

thin stratus
#

I never tried selecting Standalone and having PlayAsClient selected

#

I usually only test Dedicated Servers via packaged builds

#

Well the connection process

#

Actual gameplay, as long as not via MainMenu, is something I test in Editor

#

You can also start the Dedicated Server via .bat file outside of the editor

#

Still with Editor Cooked files, but at least it's its own instance

#

tbh I would try to either pakcage Server and Client

#

Or to use the bat file to start a proper standalone server

#

And see if that problem still exists

#

Before you are hunting an Editor bug

queen escarp
#

hm i hear you ill build and test right away

#

yeah ok so still dont work with built

thin stratus
#

You packaged Server and Client in 3 minutes?

#

Just ensuring that you aren't mixing terms up

queen escarp
#

erhm, im packaging my project x) iddno i dont have 2 different onces, i dont have a dedicated server its just connecting to my pc i suppose :/ ?

thin stratus
#

Wait a minute

#

So, there are two different ways to play a Multiplayer Game

#
  • Listen Server
  • Dedicated Server
queen escarp
#

aye, listen server thats the one i use

thin stratus
#

Listen Server means a Player clicks HOST in their Game, and starts a game by opening with ?listen

#

Dedicated Server means a standalone Server is created that player can connect to

#

If you press "Play As Client" in the Editor

#

You are simulating a Dedicated Server setup

#

In your Videos, the Text at the Top Bar of your Window says "Client 1" and "Client 2"

#

In a Listen Server setup, the first player should say "Server"

queen escarp
#

erhm, ok so i think this is the problem then that the "client1" is the "server" and clients 2,3,4,5 are playing on clients 1 as a server ?

thin stratus
#

Well

#

If you aren't planning on doing Dedicated Server

#

Then don't use "Play as Client"

#

eh

#

Sorry, one sec

#

corrected it

quasi tide
#

Whew - I was about to have to reply 😈

thin stratus
#

Go back to work!

queen escarp
#

z)

quasi tide
#

Work don't start for an hour boss

queen escarp
#

well i mean i just went after a tutorial,

thin stratus
#

Either way, you should use "Play as Listen Server"

#

When you test multiplayer

#

And if you want to test connecting to each other

#

You should use "Play as Standalone"

#

Which ensures both players are unconnected

#

Your hosting Client, in Editor, should have "Server" at the top of the Window

queen escarp
#

ohhhh

thin stratus
#

And if you do the connection test, they should both say "Standalone" iirc.

#

Don't have a project at hand to confirm that

#

But if you have 2 Players, and you have both of htem say "Client", then you are testing Dedicated Server

#

Which you said you aren't planning on using

#

So that is wrong

#

Not that this would explain your bug

#

But at least you aren't mixing stuff up

queen escarp
#

aye this really clears things up for me

#

thanks, however dosent explain the bug really ? i now know where its comming from but

thin stratus
#

Well both of your players were clients

#

Still not sure what the bug is

#

Or why it happens

#

Or rather, it might explain why you didn't have the bug when playing on the gameplay map

#

Because then both were clients I guess

#

And when you played from main menu you were creating a ListenServer setup

#

So maybe if you do Play as Listen Server on your Gameplay map it now also breaks

queen escarp
#

yeah true when i play as listed server now that dont work aswell

thin stratus
#

Which would at least remove some of the randomness

#

Yeah then it's clearly something in your code that prevents the Server from doing stuff

#

And you'll need to place some print strings and breakpoints along the code path

#

And see where and why it stops

queen escarp
#

hm and in case i would want to use dedicated server the short answer is i would need 2x projects wich 1 project is the "server" and the other is the clients right ?

thin stratus
#

You have 1 Project

#

But you package a Client and Server

#

For that you need to build the Engine from Source though

#

You can't package Dedicated Servers via the Launcher Engine Version

queen escarp
#

ok so for my first small "friend multiplayer project" what do you think i should focus on ? getting stuff to work as listed or should i focus on dedicated ?

thin stratus
#

Listen Server

queen escarp
#

ok, so probably its with the code then since ive apparently played as 2 clients so i guess thers alot of multicasts and run on server thaths messing with it :/

#

i mean for instance the "replicates" should this event be replicated to all clients when called on the server ?

dose this mean that this wont affect the "client1(server)" ?

thin stratus
#

Multicasts are called on all Clients and the Server when executed by the Server

#

Again, instead of theorizing this, place PrintStrings and check where it fails

queen escarp
#

yeah but i dont know where to begin witht that :/ i mean should i check on liek "the take damage" and se where it fails ? or why its not even colliding or something

thin stratus
#

Start where the whole thing starts

queen escarp
#

obviously you dont know this since u dont know my code buty xd

thin stratus
#

On the Key Press

queen escarp
#

ok

thin stratus
#

The key press that executes the attack

#

And then go along the code path

#

Somewhere it must stop calling for the server

queen escarp
#

ok so that dient take long

#

in this case server,,1/2 is both client 1 right ?

#

or client 0 **

#

ok so i found a issue its a variable "CanAttack(Bool)" that i have on Replicated since all clients have their own

thin stratus
#

Just see Server as ListenServer

#

And Client as Client

#

Otherwise this gets confusing

queen escarp
#

Run on Owning Client/ Run on Server

#

for a listedserver i should always use "Run On Owning Client" instead of Run on Server ?

#

@thin stratus

thin stratus
#

No

#

There is no rule that binds them like that

#

Run On Owning Client targets a Client, called by a Server

#

The Owning Client of that Actor to be precise

#

Run on Server targets the Server, called by a Client, if the Client owns the Actor

queen escarp
#

so that would only affect the "host" then in my cacse i suppose

thin stratus
#

Idk what you are doing

#

You don't need to Server RPC to the Host if you are already on the Host code side

queen escarp
#

well my problem is for almost all my functions whatnots

im calling a function that is "run on server" then after that runs functions that Multicasts"

#

the problem is from what i can se that server client(listedserver my client) dosent seem affected by this but all other clients works as intended

#

it must be something related to that

thin stratus
#

There is rarely a reason to call a lot of RPCs

#

Most ServerRPCs are only required if Clients perform Client side actions the Server has to know about

#

e.g. a Key Press

#

And MulticastRPCs are usually only needed if the Clients have to do a specific thing in that very moment

#

Anything else is usually handled by Replicated Variables

pearl bear
#

when ping getting higher client my camera movement become laggy. My camera moving with aimoffset animation. void UCameraControlComponent::LookUpAtRate(float Rate) { OwnerCharacter->AddControllerPitchInput(-Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds()); ServerAimOffsetCalc(); }

#

Am I doing wrong?

# 
{
    ACharacter* character = Cast<ACharacter>(GetOwner());
    AimOffsetPitch = UKismetMathLibrary::NormalizedDeltaRotator(character->GetActorRotation(), character->GetControlRotation()).Pitch;
}
quasi tide
#

Are you saying your camera movement is tied to your latency?

pearl bear
#

Yep

thin stratus
#

What is your Camera Component attached to

pearl bear
#

This is an FPS game, camera attached to head bone

#

(socket)

thin stratus
#

Of the Mesh Component?

pearl bear
#

yes

thin stratus
#

Not your own Mesh Component or stuff like that?

#

Because only the children of the build in Mesh Component are smoothed

#

Everything else that is child of the Capsule is teleported

pearl bear
#

Its built in mesh component of character

thin stratus
#

Hm okay, then not sure

pearl bear
#

when camera goes down or up with aimoffset, its laggy

#

Aimoffset angle is calculated by that function void UCameraControlComponent::ServerAimOffsetCalc_Implementation() { ACharacter* character = Cast<ACharacter>(GetOwner()); AimOffsetPitch = UKismetMathLibrary::NormalizedDeltaRotator(character->GetActorRotation(), character->GetControlRotation()).Pitch; }

thin stratus
#

Why is that a ServerRPC though?

queen escarp
#

but i dont get it then, on the clients everything works 100% as intended, but the "listenserver" nothing works, or well i mena nothing gets replicated etcetc, shouldent it be treated as a client aswell ! 😮 thats what im not getting theyre supposed to be treated the same way

thin stratus
pearl bear
thin stratus
#

There is no replication for servers

#

They are the authority

thin stratus
#

That's what GetBaseAimDirection is for

#

Or rotation?

queen escarp
thin stratus
#

Ah what is the damn function name again

#

GetBaseAimRotation

#

Is the name

pearl bear
thin stratus
#

Yeah it returns the RemoteViewPitch for Players that have no access to the COntroller of the pawn

# 
FRotator APawn::GetBaseAimRotation() const
{
    // If we have a controller, by default we aim at the player's 'eyes' direction
    // that is by default Controller.Rotation for AI, and camera (crosshair) rotation for human players.
    FVector POVLoc;
    FRotator POVRot;
    if( Controller != nullptr && !InFreeCam() )
    {
        Controller->GetPlayerViewPoint(POVLoc, POVRot);
        return POVRot;
    }

    // If we have no controller, we simply use our rotation
    POVRot = GetActorRotation();

    // If our Pitch is 0, then use a replicated view pitch
    if( FMath::IsNearlyZero(POVRot.Pitch) )
    {
        if (BlendedReplayViewPitch != 0.0f)
        {
            // If we are in a replay and have a blended value for playback, use that
            POVRot.Pitch = BlendedReplayViewPitch;
        }
        else
        {
            // Else use the RemoteViewPitch
            POVRot.Pitch = RemoteViewPitch;
            POVRot.Pitch = POVRot.Pitch * 360.0f / 255.0f;
        }
    }

    return POVRot;
}
pearl bear
pearl bear
thin stratus
#

Seems fine to me

pearl bear
#

camera not moving

thin stratus
#

Check the values of the Rotators :P

pearl bear
#

Values are correct

#

but aimoffset not working 😄

#

I am on check them

#

@thin stratus I am using other skeletal mesh for FPS and its not working

#

I think something different with default character mesh and my own skeletal mesh

dark edge
#

Holdover from the old days?

chrome bay
viscid tapir
#

What happens if i broadcast a delegate on server ? Only server can see it ? I have a shop that refreshes its items based on this delegate, the update should be server-side only so it would be appreciated if the delegate is only fired server-side

chrome bay
#

delegates are local only

eager flare
#

I am getting duplicate entries in the playerarray of GameState after seamless travel, but running locally is fine when using Steam App ID 480
Any idea ?

viscid tapir
graceful stag
#

Hello, I am having problems with the following flow: using seamless travel I have the server lobby, then travels to gameplay level, then to WinScreen and after win screen i need to travel to the Lobby again. I used ServerTravel on server for the server lobby-> gameplay, gameplay->winScreen, but for the winscreen to lobby I am using a client travel as the core logic resides in the UI widget in each client (is a timer that calls the client travel when reach 0segs), so using server travel doesn't work, when the client do the travel, if stays connected to the aws server but when reaching the level the player cant do anything and the pawn is deleted after an left the game in an unplayable state, do i need to more in the client travel custom?

dark edge
viscid tapir
#

but I will need this repnotify to make sure delegates are called on server side

#

thank you !

viscid tapir
dark edge
#

wait are you talking about the shop refreshing items or the view of the shops items refreshing?

#

It'd probably be like
Delegate -> shop refreshes -> shop repnotifies new items

repnotify -> do things based on shop having new items now

viscid tapir
#

This is this kind of code (pretty rare in games) :

{
    for (FCardsData& CardData : AllCardsData) {
        if (CardData == Card && CardData.IsCardAvailable()) {
            if (CardData.CurrentCards == 0) {
                OnCardChanged.Broadcast(CardData.CardRowName, false);
                         }
        }
}```
dark edge
#

delegates are local only, for doing something on clients when shop refreshes, your options are a repnotify (if it's stateful) or a multicast RPC (if it's not)

#

What is that code doing in plain English?

viscid tapir
dark edge
#

The shop data is replicated right?

#

or is it query only (clients only know about it when they open the shop or whatever)

viscid tapir
dark edge
viscid tapir
#

But the code in the gamestate is updating card availibility, so I thought that card is not available anymore -> fires delegates over network
-> Card Shops who have bound this delegate call the refresh function -> refresh function removes or add the card

viscid tapir
dark edge
#

refresh on server

#

unless you want everyone to have clientside cards for some reason

viscid tapir
#

Oh, refresh each shop in the server (gamestate in this example) ?

viscid tapir
dark edge
#

You should do this.
Server:
Whatever condition -> delegate? -> update shops -> repnotify

Everywhere:
Repnotify -> update stuff that needs to know about the new shop inventories

viscid tapir
#

Mmmh thank you

#

i'll try to set it up

viscid tapir
#

I had this code in the shop class Super::BeginPlay(); if (HasAuthority()) { TArray<FName> RowNames = ItemDataTable->GetRowNames(); for (FName& RowName : RowNames) { FCardStruct* TempCard = ItemDataTable->FindRow<FCardStruct>(RowName, "Context", false); if (TempCard) { if (TempCard->CardType == ECardType::ItemCard) { ItemCards.Add(*TempCard); } else if (TempCard->CardType == ECardType::HealCard) { HealCards.Add(*TempCard); } } } GameStateRef.Get()->OnCardChanged.AddDynamic(this, &ACardShop::RefreshCards); }

# 
{
    FCardStruct* TempCard = ItemDataTable.Get()->FindRow<FCardStruct>(CardName, "Context");
    if (TempCard) {
        int32 Index;
        if (TempCard->CardType == ECardType::HealCard) {
            if (bExpiration) {
                bool bFound = HealCards.Find(*TempCard, Index);
                if (bFound) {
                    HealCards.RemoveAt(Index);
                }
            }
            else {
                HealCards.Add(*TempCard);
            }
        }
        else if (TempCard->CardType == ECardType::ItemCard) {
            if (bExpiration) {
                bool bFound = ItemCards.Find(*TempCard, Index);
                if (bFound) {
                    ItemCards.RemoveAt(Index);
                }
            }
            else {
                ItemCards.Add(*TempCard);
            }
        }
    }
}```
#

It should be repnotify -> update shops ?

meager spade
#

if you have a lot of cards, maybe a FastArraySerializer

viscid tapir
#

I already heard about it but I don't know really what it is. however, I have like max 25 cards. is FastArraySerializer needed in this case ?

graceful flame
#

Someone should really make a simple set a blueprint screenshots that shows the common multiplayer mistakes such as unnecessary RPCs and then have a corrected blueprint screenshot after.
So for example demonstrating how Player inputs should be setup to be replicated, Overlaps for the possessed pawn, Overlaps for a level actor, and looping through the Players array on GameState...etc

#

Then we can have that message pinned and just direct people to it.

slow wing
#

If you make an RPC with a default value for one of the argument, does the default value get serialized over the network, or nothing gets serialized and the receiving side creates the default value locally?

latent heart
#

There is, effectively, zero difference.

#

All values are "created locally" by the client when receiving the serialised data.

#

However, if you use a default argument, I believe that argument is passed to the function, so it would be the same as providing the default argument manually.

slow wing
#

I am mainly concerned about the bandwidth aspect rather than the serialization on the client

latent heart
#

It's going to send that default value as well, yes.

slow wing
latent heart
#

If you want less bandwidth, create 2 functions. One with and without the argument.

slow wing
#

Yea thats what I have now and was hoping to unify 😄

#

I mean they both call the same internal function, so its about as unified as I can make it atm

#

Thanks for the info!

red musk
#

What's the recommended paradigm for having a multiplayer game that is very bullet-hell like with a lot of projectiles? Spawning that many replicated objects seems like it could choke the replication bandwidth

fossil spoke
red musk
#

Yeah, my current strategy is spawning non replicated projectiles on both client and server, and doing the authoritative stuff on the server side. This can result in desyncing though where a projectile appears to hit but doesn't, especially if there's a delay between them due to something like client prediction (for projectiles fired by the player)

#

So it makes me think I'm doing it "wrong", was curious what other paradigms people recommend