#multiplayer

1 messages · Page 71 of 1

hollow eagle
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source's prediction system is legit one of the nicest things about the engine. Old as shit, but prediction is a first class citizen out of the box 🥲

ember vine
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if valve dont spill the beans on how it works then the army of hackers making cheats for cs prolly will

twilit radish
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Regular modding is a thing for CS:GO too. So either way it will find a way 😛

hollow eagle
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Source 2 hammer will be a thing, obviously

unkempt tiger
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garry newman got source 2 from valve like 2 years ago, its probably in there unless it's a recent addition. If it's in there then hundreds/thousands of s&box developers were probably already exposed to the API unless it was masked by the facepunch team

ember vine
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yea he has pretty good things to say about it too, which is interesting because normally he just complains like a true brit

quasi tide
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He needs to make a full game before he starts complaining about the engine

unkempt tiger
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his blog post about UE is still scarred into my brain

quasi tide
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Link?

ember vine
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i wanna read this, trying to find

unkempt tiger
ember vine
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hoping it'll be as juicy as linus torvald c++ rant

quasi tide
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Oh, 2016? Pass.

unkempt tiger
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its not really juicy, but he sheds a valid opinion on the nightmare that is UE C++

ember vine
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OMEGALUL already the first few lines

quasi tide
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Eh - Just a blog post saying C++ is shit. Yeah, we know.

hollow eagle
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most of that is just him discovering what the engine does/doesn't have, not even really any complaints

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not like his unity rant

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and yeah, source 2 isn't new. The sub-stepped ticks seems to be either CS2-specific, brand new to source 2, or just heavily NDA'd.

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I wouldn't be surprised if it's a system specific to CS2 - that kind of substepping is usually pretty specific to systems it gets used by.

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though tagging inputs with more granular timing information would be a nice generic thing

dark edge
lost inlet
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the CMC performs it

dark edge
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well yeah but I see people conflating Character and Player all the time

lost inlet
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I do have access to s&box, it's trying its best to not remind you it's Source 2. the editor is heavily customised from the vanilla s2 suite

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large parts of it we rewritten in C# to give an editor API for addons

elfin copper
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Guys how to deal with OwnerNoSee and OnlyOwnerSee when the class is not the same as the player? The owner of the mesh is actually the class itself so this approach is not working to properly set the weapon visibility, any thoughts?

rose egret
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any tutorial on how to make AWheeledVehiclePawn replicated ? I made it client authoritative but its not working

graceful flame
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Actors have a replicated checkbox, is it checked or unchecked?

obsidian granite
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Trying to create a dedicated server using UE5 documentation, but getting this error - any idea?

image.png
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All I have done is create a [PROJECT_NAME]Server.Target.cs and it's throwing the error

hollow eagle
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show the full build output

latent heart
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Did you edit the file to say it's a server target instead of game?

obsidian granite
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@latent heart ^ this is what I have mate

latent heart
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Seems right.

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Check the output log for more info.

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Not the errors list.

obsidian granite
thin stratus
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The error sounds like you have some other UE process running

latent heart
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Also copy+paste. DOn't screenshot.

thin stratus
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Code 6 for me is usually when something is stuck and didn't close. Check in task manager for any UE related processes

obsidian granite
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'''2>Creating makefile for AresServer (no existing makefile)
2>Server targets are not currently supported from this engine distribution.
2>C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.MakeFile.Targets(44,5): error MSB3073: The command ""D:\Epic Games\UE_5.1\Engine\Build\BatchFiles\Build.bat" AresServer Win64 Development -Project="C:\Projects\Ares\Ares.uproject" -WaitMutex -FromMsBuild" exited with code 6.
2>Done building project "Ares.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 1 skipped =========='''

latent heart
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Are you using a launcher build?

thin stratus
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You gotta need to download the engine from GitHub and build it from source. Dedicated servers aren't supported by standard launcher builds

latent heart
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Aren't*

obsidian granite
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Ahh my bad - I appreciate the help both!

thin stratus
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Gnah phone

latent heart
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🙂

obsidian granite
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Thank you!

deep coral
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when a client loads an actor when joining in, does OnRep notify functions get triggered on client net load?

fossil spoke
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OnRep will be triggered if the value of that variable has changed

deep coral
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eg, if I have a door with a variable Open which is OnRep notified, and it is set to true on the server, when a client loads in and loads the door, it will load as true but will it also trigger the onrep func?

fossil spoke
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If by default the bool is false, but the server changes it to true, then a Client connects. The OnRep will be called because its value has changed.

deep coral
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i see thx

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If I have a replicated variable in an actor that is a struct, and If I change one of the inner variables using a pas by ref, does the change get replicated to clients?

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using pass by ref BP node on the server

fossil spoke
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@deep coral I vaguely remember there being a bug where that doesnt cause it to rep.

swift portal
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Is there a way to have my unreal engine game send data to my server? Like let's say I wanted to send my players location to my python app every second. Is this possible?

fossil spoke
swift portal
fossil spoke
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With a Marketplace plugin probably.

mortal mica
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what's the main idea behind saved moves? is it for rolling back simulation and apply corrections?

noble sentinel
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Am I need to put replication in to run owning client?

image.png
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It works without it(this is in game instance), but I saw somebody do run owning client on tutorial video

fossil spoke
fossil spoke
mortal mica
# fossil spoke Yes

so the main purpose is to be more "fair" in who shot who, give laggy players a better experience, correct?

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ie, avoid the whole "aim ahead of the movement to hit"

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im trying to implement a "ship" movement component, wondering what features i need to consider from the cmc

noble sentinel
fossil spoke
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No, its to ensure that the Character on the Client side respects the authority of its position on the server while maintaining a smooth visual for remote Clients.

mortal mica
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or which are good enough to leave out, at least for now

fossil spoke
mortal mica
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why would you rollback movements for that?

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makes sense

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follow up question, but I'm guessing the whole "Combining moves" is just to save bandwith? I mean if player moved forward 1 meter, and then right 1 meter, it can be just sent as (1,1) in a single move and be done with it.

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so in a naive implementation I could ignore combining moves at least until I get it working

hollow eagle
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it's so that you only need a single rpc for the move instead of one per move

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  • then you don't need to worry about whatever additional latency it might introduce
nova wasp
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How nasty is a client deleting a networked actor before the server does? Seems fairly evil but I'm not certain

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I can just... not do that I guess

uneven kraken
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So "Iris Replication" was listed in the roadmap as experimental for 5.1, but the 5.2 roadmap page doesn't mention it at all. Does that mean it's been dropped as a feature?

fossil spoke
fossil spoke
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Dont fret, it wont be dropped as a feature. Its a pretty important overhaul.

fiery eagle
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Hi Guys I have a Question Regarding the a function i am calling from client please tell me if this format is acceptable if not please correct me cpp void Func() { if(HasAuthority()) { //FunctionChangeState } else { if(IsLocallyControlled()) { //Server_FunctionChangeState } }

thin stratus
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@fiery eagle looks fine. Only comment I would have is that sometimes you want to do the FunctionStateChange locally too to predict it.

dark edge
fiery eagle
fiery eagle
void nest
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Is there a way to find out if a session is singleplayer or hosted?

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(in BP)

thin stratus
thin stratus
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There are things where you want it to replicate back to the client

void nest
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if this returns false it means the user in not hosting and thus in singleplayer

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IsServer returns true on singleplayer as well

thin stratus
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Oki

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Didn't know that was available in BPs

short arrow
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Hey guys, does anyone know of a way I can simulate a player count so that I can profile a specific number of people (playerstate, controller, character, etc.)? Maybe unreal has some setting for this that doesn't require me to set my computer on fire trying to open 50 clients. Or maybe someone knows a service that you can pay for something like this?

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I can't really spawn AI because they already run on the server meaning there'd be no replication checks or relevancy checks happening Ahhh

sick egret
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conceptual question here: what's the point of UGameInstance::PreloadContentForURL?
does it start the loading right away? because if you immediately call this before doing a server travel, aren't the assets loaded one way or another?

thin stratus
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I have an Array of CastingInfos. When one starts Casting it adds an entry and returns a handle to it.
I'm a bit at a loss at the moment how I would handle replication etc. for the Casting stopping/canceling, because if I remove the entry from the array to trigger replication, it does of course not allow for notifying anyone because the entry is gone.
If I pass in the previous entry into the OnRep, I still don't know the reason for the removal (e.g. Cancel vs Stop).

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Is there some concept one can apply for this kind of setup?
Basically an Array of Information that gets entries added when starting something and entries removed when stopping it, and then notifying everyone who wants to know about the start and stop, as well as the reason for the stop.
Since this is a state I don't really think an RPC would be a good idea.

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FGameplayCue talks about stuff being invoked from RepNotify, but I can't find where they do that. I only find Multicasts

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oh

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FActiveGameplayCue is a FastArraySerializerItem

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Oh that could work actually. Because FastArray allows me to react to the removal of the item. But then I would still not know if it was due to cancel or stop

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I wonder what happens if I change something in the Array Entry and then call remove on it

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Does PreReplicatedRemove call with the updated info?

ocean vessel
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hi, which delegate in Online Interface gets called when "Join Game" is performed ?

image.png
rose egret
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@thin stratus however they say not to use reliable RPCs, but in a similar case I used Initial Only replication + reliable RPC to send actions instead of replicating my whole array, at least its working till now for me. FastArray could work but I did not use.
maybe add a variable to your array item to indicate why items was added! because of remove or ..

thin stratus
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Yeah I'm close to trying it out

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I looked a lot at GameplayEffect and Cues that use these FastArray setups

glass vector
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how do you reset the gamemode, gamestate, and player controllers after a seamless travel? I don't want any persistance at all

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I just want a faster player experience from seamless travel

thin stratus
thin stratus
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Does modifying a FFastArraySerializer locally cause the per element events to call?

open junco
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How do I draw debug lines (via DrawDebugLine) on clients from the server? Via RPC, or there's some other method?

chrome bay
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RPC, or if you're in single process PIE you can do a massive hack and get the client editor world

rose pollen
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how do you set up a .ini file in VS that only is loaded for a dedicated server build?

surreal niche
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How are you supposed to add filters to the UCommonSessionSubsystem's UCommonSession_SearchSessionRequest so you can find sessions with specific parameters?

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I know how to do it manually, but I don't see a way through Common

tranquil swallow
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Hey guys! I'm having a super odd issue that I've been a bit stumped on, if you are able to help or have questions lmk!
Issue:

In an Unreal Engine 5 Blueprint project, I've implemented a weapon system with custom events for shooting and handling damage. When a player shoots, the following sequence of events takes place:

"FireWeapon_Client" event (client) > "FireWeapon_Server" event (server) > "FireWeapon_All" event (multicast)
Weapon-specific event for spawning a projectile and setting damage values
"ActorBeginOverlap" event in the projectile Blueprint checks for player collisions and calls "ReceiveDamage" on the hit player
"ReceiveDamage" event subtracts damage from health (health is replicated) and calls "CheckHealth" event
"CheckHealth" event checks if health is <= 0 and calls "DeathMethod" event (multicast and reliable)
I am encountering two issues:

When the server shoots a client, the client dies instantly with one bullet.
When a client shoots the server, it takes two bullets to kill the server. However, when a client shoots another client, it still takes one bullet.
I need help in identifying and resolving the cause of these issues, ensuring that damage is calculated and applied consistently for all players (server and clients).

naive dagger
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hi! is the "ServerFixedFPS" in editor setting the same as the server tick rate ?
tried setting it to 60 and it made the vehicles jitter

dark edge
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make sure you're not double dipping

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I'm assuming only the multicast actually fires the projectile?

tranquil swallow
dark edge
winged badger
tranquil swallow
rose egret
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anyone know why movement is replicated with delay when I detach my character from vehicle ? (if you notice character moves down a little then receives location and jumps to left side of car)

Character->DetachFromActor(FDetachmentTransformRules::KeepWorldTransform);
Character->SetActorLocationAndRotation(exitPoint, exitRotation);
Character->GetCharacterMovement()->SetMovementMode(MOVE_Falling);
Character->ForceNetUpdate();

I feel like its because of switching from AttachmentReplication to ReplicatedMovement 🤔
any idea ?

winged badger
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Predicted?

winged badger
dark edge
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Or rather

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Show the actual overlap event

winged badger
dark edge
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@tranquil swallow you really oughta be doing more replication with repnotify and less RPCs. This is a bit of a mess. Are you intending for hit detection to be clientside?

rose egret
tranquil swallow
dark edge
rose egret
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@winged badger attachment, bHidden, .. are replicated at once but either position is arriving late or client is not applying it instantely I dunnow

winged badger
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Might have something to do with that weird skeletal mesh rotation on character, 90 degrees

dark edge
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Overlap -> has authority? -> do the stuff

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Not a run on server event

tranquil swallow
dark edge
tranquil swallow
winged badger
tranquil swallow
dark edge
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Receive damage doesn't have to be an RPC

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You're already on the server

tranquil swallow
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That's right. A bit redundant there let me fix that

dark edge
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Ooh I know

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I know what it is

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The bullet is not replicated

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So has authority is true everywhere

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Hmm maybe that's not it

rose egret
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@winged badger btw it happens when ping is high, look like movement is replicated with next packet

dark edge
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But it's certainly not great.

tranquil swallow
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Previously I had replicated true on projectiles until I came upon the issue of multiple bullets being in existence for each fired.

dark edge
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Yeah this is all a bit of a mess

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I think it's the fact that recieve damage server is an rpc tho

dark edge
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Should be 1 time, always

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er

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lol the non-replicated bullets are really throwing this for a loop

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I'd just replicate the bullets since you're not predicting anyway

tranquil swallow
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Client 1 shoots Client 2

image.png
dark edge
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Input -> Run on server
Run On Server -> spawn REPLICATED projectile -> multicast (for cosmetics)

tranquil swallow
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Mk Ill try that out

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Thanks, I have to go for a bit but will def try that out and rework this a bit

dark edge
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Then in REPLICATED projectile
Hit -> has authority? -> do stuff

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What you're doing is close to OK but it'd be more for a local projectile system with clientside hit detection

tranquil swallow
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thumbs_up I'm just realising now how dumb my current logic is and is just everywhere

dark edge
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with the "Server does everything" model things will at least make sense and be simple

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but you will have ping lag

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prediction makes everything much harder as you gotta think about everything from 3 points of view, the local client, the server, and remote clients, who will all see something slightly different and at different times

rose egret
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@winged badger soory for mention. i found my problems
that effect was seen only in autonomous client, and I forgot that Actor.ReplicatedMovement is not replicated to autonomous.
for simulated clients I need to tell CMC to instantly jump and don't do any extrapolation.
and for local client I need to tell the CMC to send and ack instantly.
do u know names of such functions ?

warped steppe
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I've looked around in here and I can't find it: What's the world context string to make debugging nicer in the IDE?

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in the watch window at least (show if we are client/server etc)

fathom aspen
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This is it. For UE5 you probably want to use UnrealEditor @warped steppe

thin stratus
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I was looking for that a few weeks ago

mortal mica
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I was looking for that a few hours ago 😄

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we need a VS plugin that just displays that as an overlay 🙂

fossil spoke
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I have this bookmarked, real quick to access the ImmediateWindow commands

pastel tangle
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how do i set movement component to be client authoritive

eternal canyon
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If u look in the details panel they are right next to each other

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Ignore server corrections is one

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I’m pretty sure

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And accept client auth position

pastel tangle
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im trying to set it in vehicle movement component

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its not called like that there

fathom aspen
fossil spoke
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Its been around a long time lol

fathom aspen
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Damn...

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Yeah since they call it "Visual Studio...", must have figured ^^

fathom aspen
nova wasp
naive dagger
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hello everyone!
So I have this problem where the vehicle (using ChaosWheeledVehicleMovementComponent) jitter, it only started appearing after I set the “ServreFixedFPS” in the editor setting to 60, the jitter becomes worse the more I increase it. I have already enabled smooth fps and substepping.
Anyone encountered this problem before?

uneven lion
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I'm confused

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do I "Destroy Session" before or after this? I am worried about doing Destroy Session after a Join Session On Success, or when should I?

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if I don't destroy the session, I get an error going back to a previous server can't join twice

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but then if I call Destroy before Join, join can fail and now I must re-search for and re-connect to my current session, am I understanding this right?

fossil spoke
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@uneven lion Only the Host should be destroying the Session they have Created.

molten matrix
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I'm hitting this issue where once I ServerTravel to another map, the connected client disconnects with this error:

Thu Mar 23 21:26:13 EDT 2023  Error        LogNet                    UEngine::BroadcastNetworkFailure: FailureType = ConnectionLost, ErrorString = UIpNetDriver::TickDispatch: Socket->RecvFrom: 10 (SE_ENOTSOCK) from 0.0.0.0:0, Driver = GameNetDriver IpNetDriver_6

Any idea what would cause this?

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It's driving me a bit crazy because I hit this 3-4 weeks ago and I figured it out and now I can't remember what I did.

surreal plaza
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Do you guys have any pinned articles or videos for how to approach the online subsystem to maximize steam and EOS?

thin stratus
thin stratus
fossil spoke
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But fair enough.

vague ocean
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how do implement a blueprintnativeevent interaction interface with server, reliable

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doesn't seem I can have blueprintnative event and server on the ufunction

thin stratus
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@vague ocean Interfaces usually shouldn't be networked

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You perform your RPCs and in Class XYZ and then use the Interface functions afterwards.

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E.g. Press E to interact -> RPC to Server -> LineTrace on Server -> Call Interface Function on HitActor

vague ocean
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ah ok, I see. I was wondering about this

vague ocean
thin stratus
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I usually have this:

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  • ActorComponent that is replicated and handles RPCs
  • Interface for Interacting
  • BaseInteraction Actor that implements the Interface for easier set up
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But this also depends on how your Interaction System is supposed to work

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Often times it's overlap based, other times you want some prompt when you trace an interactable actor etc.

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So most of the time, if that is similar to your system, the ActorComponent would perform a Trace on Tick to check if the Player is looking at an Interactable, keep track of the currently traced one, maybe highlights it and calls an EventDispatcher/Delegate to update some UI.

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For Overlap ones, where you just walk into range of an interactable, we usually have another component on the Character (The ActorComponent sits on the Character most of the times), that handles overlaps, so a SphereCollision for example. The ActorComponent can then react to actors entering and exiting the SphereCollision, maybe check which of all the overlapped actors is the "Best" one (e.g. facing angle) etc.

vague ocean
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Yep this is the same for my system, I have my character actor sending out line traces and storing the currently "focused" object

thin stratus
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In the end, some input will trigger interaction on that current interactable

vague ocean
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then I can call the Interact event on that object

thin stratus
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Yeah, so 99% of that stuff I wrote is happening on Server and Client

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If the Game is ListenServer based, then it can be only on the Client fwiw

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Pressing Interact triggers an RPC then, that either just tells Server that you interact

vague ocean
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this will have a dedicated server

thin stratus
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Or even gives the server what you interact with if cheating is not a problem

vague ocean
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cheating will be a big issue haha, need everything possible on the server 😂

vague ocean
calm prawn
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Hi guys. I have a replication problem. What I'm doing wrong?
I have a flying actor, controlled by a mouse but the client is not working as expected.
For CurrentPitchSpeed and CurrentYawSpeed I have the same thing.
Controller rotates -> server rotates -> server sends to onrep -> onrep notify clients

image.png
vague ocean
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anyone know why a server rpc being called from a client wouldn't be running? Im calling it on an object from the player character
runs fine from the listen server player character

blazing spruce
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Does any particular culling methods need to be used / is preferred specifically for multiplayer?

prisma snow
blazing spruce
prisma snow
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for multiplayer, it depends on your game

vague ocean
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So I was getting the
No owning connection for actor error in the console, I did setowner on the actor, but now nothing happens on clients

prisma snow
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if it is fps or third person, look at the replication graph @blazing spruce

blazing spruce
prisma snow
blazing spruce
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No worries, ill have a look at the replication graph, thanks!

molten matrix
vague ocean
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im rotating an actor inside of a server rpc (server, reliable ufunction). when done from a client, this is not being replicated to the other clients

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replicate movement is ticked on

surreal plaza
vague ocean
grizzled stirrup
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Got burned by that a few times!

surreal plaza
thin stratus
molten matrix
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Eventually, I want to use steam, but currently using the null subsystem for development. I do see some logs about steam subsystem failing to initialize which is strange since I’m not currently using the steam subsystem

thin stratus
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If you use Steam you'll need the SeamlessTravel either way

vague ocean
surreal plaza
vague ocean
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im calling the server interact on the actor from the player character, after a line trace

surreal plaza
# vague ocean

This should be in an _Implmentation method afaik. So ServerInteract_Implementation

vague ocean
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when I removed _implementation it got called, but not replicated

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so idk wtf is going on 😂

surreal plaza
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Are you using a debugger?

vague ocean
surreal plaza
vague ocean
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the editor console

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can't remember what its called

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where UE_Logs go

surreal plaza
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For the moment, I would strip it down a little. Take off virtual just in case that is doing something weird. Also, are you passing in the actor to modify it?

vague ocean
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virtual gone, swapped them all to the _implements version

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not getting called on client, still works fine on the listen server

vague ocean
chrome bay
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Client isn't going to run a Server function unless it has authority over the object

vague ocean
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is that right?

chrome bay
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Only the Server can set the owner

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And it has to replicate from the server

vague ocean
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ah, how do I do that?

ruby lodge
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Does anyone have a good tutorial or tutorial series about how to implement online functionality and upload the game to steam?

Idk really if that's right here or in #online-subsystems so I try both. Tell me which one is in the right channel to remove the other one.

chrome bay
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Bit strange though

ruby lodge
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I mean really basic stuff like creating a server and joining. No interaction even

vague ocean
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because wont that just never run from clients?

surreal plaza
chrome bay
vague ocean
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interact, focus, unfocus, etc

chrome bay
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The bottom line is though, clients can't change object ownership

vague ocean
chrome bay
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Only the Server can do that

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You can't - you have to route the RPC through an object that you DO own

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A common workaround for interaction systems for e.g, is you put the RPC's on the controller, or pawn, or a component belonging to one of those etc.

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And pass the object your interacting with as the argument

surreal plaza
vague ocean
vague ocean
sterile plaza
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I have a player start that I have positioned and rotated. On the server, the camera gets both values. On the client, it only gets the location and does not receive the rotation.
Is this expected? Is there a checkbox to make that happen (I haven't found one) or do I need to set the rotation manually?

sterile plaza
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wtf is APawn::RemoteViewPitch? Why is that a thing?

quasi tide
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So you can properly animate simulated clients, IE - so you can see when your friend is looking up or down on your screen.

sterile plaza
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Oh, I see. For seeing other clients.

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Why is it so hard to figure out how to make my client camera use my player start rotation?

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I can write a bunch of code to RPC the value down at start, but it seems crazy for that to be necessary.

sterile plaza
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This shouldn't be this hard.

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Holy shit. I finally flipped bits until it worked. Now to see if I can figure out which combination did it.

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UsePawnControlRotation on the camera has to be off.

sterile plaza
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And inherit pitch had to be off on the spring arm.

prisma snow
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I dunno how accurate or deterministic Chaos is, but I would not rely on it for multiplayer. For a similar case, my plan was to send the arrival location pre-calculated in the server, so that the client arrives at the same one

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dunno if the physics API lets you simulate with a hardcoded goal, I guess not

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mmm

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could be

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tricky scenario

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but should be doable

cerulean lintel
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Hey there! Regarding replication for a variable that holds character weapons (attached to the back of the character/socket) I’m currently using a repnotify for the weapon class variable and it works pretty well, it spawns thru a server unreliable function and replicates to clients. But when I turn this into an array and add the spawned weapon to the array, notify doesn’t work properly. Any clues on what could this be related to? Does arrays get replicated the same way?

sterile plaza
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How do you guys check if you're a client? That is you're running UI. This would be true for both dedicated client and standalone.
UKismetSystemLibrary::IsServer() nicely tells you if you're a server, whether that's standalone or dedicated or listen server. I don't see anything that's similar but for clients.
Mostly making sure there's not something I can easily check before I write my own.

dark edge
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if that's false you have a UI

cerulean lintel
dark edge
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multicasts for gameplay are pretty much gross

cerulean lintel
#

so I'm using this for a single weapon it works as expected

UFUNCTION()
void OnRep_ActiveWeapon();

UPROPERTY(Transient, ReplicatedUsing = OnRep_ActiveWeapon)
class AHCFWeapon* ActiveWeapon;
#

but if I change this to an array it won't replicate as expected

#

TArray<class AHCFWeapon*> WeaponSlots;

dark edge
#

Does that not replicate, not call the repnotify, or does the stuff after the repnotify not work?

cerulean lintel
#

First, it spawns twice the weapon on the client, which doesn't happen if it's a single property

#

Second, it doesn't replicate, even though it's in GetLifetimeReplicatedProps

dark edge
#

Are you still using multicasts anywhere?

cerulean lintel
#

no, I use repnotifies already, this is how I spawn the weapon

#

this works perfect if it's a single weapon, but not if I change that into a tarray

dark edge
#

I'd first start out by checking that WeaponSlots is replicating correctly

#

So is the first weapon in WeaponSlots considered to be the one you're holding? Is it like:
0: MainHand
1: OffHand
2: Back
3: Back
?

cerulean lintel
#

my plan was to use an index for the active one (possibly replicated as well?)

#

ideally, adding to the slots only equips to the back, doesn't make it active

dark edge
#

Start by making sure the pieces work bit by bit. Just print the array on tick or something and make sure it replicates right

cerulean lintel
#

since it's a server function, UFUNCTION(BlueprintCallable, Server, Unreliable) it shouldn't be called twice right?

#

I'm wondering if I'm missing any other HasAuthority check somewhere

#

Or IsLocallyControlled

fossil spoke
dark edge
#

the one that leads to the setting of the array?

sterile plaza
sterile plaza
#

Why are you calling OnRep_ActiveWeapon() ?

cerulean lintel
cerulean lintel
sterile plaza
#

Doesn't work that way. But I understand the attempt.

cerulean lintel
#

so now, my doubt is, if I add a new weapon to the WeaponSlots array, shouldn't it replicate to clients?

#

using this

UFUNCTION(BlueprintCallable, Server, Unreliable)
void AddNewWeapon(class ACharacter* Owner, TSubclassOf<class AHCFWeapon> WeaponClass);
sterile plaza
#

It should.

#

First, switch that to reliable. Unless you're okay with that call not happening sometimes.

cerulean lintel
#

ok

sterile plaza
#

unreliable is for things that happen all the time and you're oaky if one is dropped because it will be replaced

cerulean lintel
#

should the TArray be Replicated or ReplicatedUsing?

sterile plaza
#

both replicate

#

it's just a matter of getting notified on the client

cerulean lintel
#

so for this case I don't really need the OnRep

sterile plaza
#

no, but it is very useful for debugging

#

I would use it until you've solved this

cerulean lintel
#

ok

#

what about the variable that holds which index is the active weapon

sterile plaza
#

what about it?

cerulean lintel
#

use the same approach? replicated without OnRep once finished as well?

# 
UPROPERTY(Transient, ReplicatedUsing = OnRep_ActiveWeapon)
int32 ActiveWeapon;
sterile plaza
#

looks good

#

if you don't need to know when it changes on the client

#

I would make a TArray<int> that replicates and debug that. reduce variables

cerulean lintel
#

I mean, I intend to call this from a anim_notify

sterile plaza
#

?

cerulean lintel
sterile plaza
#

for whatever you're struggling to get replicated

cerulean lintel
#

ok

sterile plaza
#

TArray still isn't working for you right?

cerulean lintel
#

it worked now but with the replicated only

#

without OnRep

sterile plaza
#

putting ReplicatedUsing makes it break?

cerulean lintel
#

for some reason, ReplicatedUsing just doesn't call it

#

like, client server outta sync

#

I have an idea

sterile plaza
#

if Replicated works, ReplicatedUsing should as well. that's weird

cerulean lintel
#

gonna delete intermediate and saved folders and re build

#

it worked now!

#

just have to find a way to set the active index now

sterile plaza
#

UE also suggests doing this now:
TArray<TObjectPtr<AHCFWeapon>> WeaponSlots;
TObjectPtr for member variables.

cerulean lintel
#

okay

#

should I follow the same approach to set the active weapon index? Like, the client calls a BlueprintCallable, Server, Reliable

#

and the server changes the index replicated varible

sterile plaza
#

yep

cerulean lintel
#

is there a better approach to pass the owner?

sterile plaza
#

who is the owner?

cerulean lintel
#

like, instead of having many functions that receives who called it

#

yeah

#

for instance

# 
UFUNCTION(BlueprintCallable, Server, Unreliable)
void AddNewWeapon(class ACharacter* Owner, TSubclassOf<class AHCFWeapon> WeaponClass);
#

eliminate this Owner param, which is required for my weapon, but fetch it from somewhere else

sterile plaza
#

Who is the owner and what is their relation to the actor that's calling the server RPC?

cerulean lintel
#

I use the owner in the weapon class

#

but I didn't want to pass it as a param to the server rpc

#

can we get it some other way?

#

like, who called this rpc

sterile plaza
#

again, who is the owner and who is the actor with teh RPC?

cerulean lintel
#

the owner is the Character

sterile plaza
#

you can only call server RPCs on actors the client has authority over, ie your controller

cerulean lintel
#

the actor with RPC is a component of the character

sterile plaza
#

and the owner is the character?

cerulean lintel
#

Character calls Component with RPC passing self (character) as the arg so the server knows for who to spawn that

sterile plaza
#

the component can call GetOwner()

cerulean lintel
#

that will be replicated?

sterile plaza
#

that's on the server

cerulean lintel
#

the component is

sterile plaza
# 
UFUNCTION(BlueprintCallable, Server)
...
void AMyActorComponent::AddNewWeapon_Implementation(TSubclassOf<class AHCFWeapon> WeaponClass)
{
  AActor* Owner = GetOwner();
}
sinful tree
#

Marking a function as "Server" indicates that you want it to be an RPC, namely, something a client would be able to call, and similarly, the client could potentially call it any time they want. Based on the name of the function and the fact you're allowing an input of a "Weapon Class", I'm not sure that's what you actually want to be able to happen as someone malicious could call that RPC with whatever valid weapon class at any time during the game.

If this is something like player walks over weapon, weapon gets added to array, then you shouldn't need a Server RPC at all - the server should detect when the player is overlapping the weapon and the weapon should be able to handle adding that weapon to the array, all without the client telling the server to add the weapon.

cerulean lintel
twin juniper
#

With the dedicated server, do I have to write custom server sided code? Or can I just copy and paste the client and run it as a server and that'll work?

latent heart
#

Just compile your project in the server configuration. Requires a source engine build.

sterile plaza
#

Some is the same. Some is different.

latent heart
#

It's baiscally the same, except it doesn't render anythign and doesn't spawn a player for itself.

sterile plaza
#

Get one of the multiplayer example projects and check it out.

twin juniper
#

Okay, I already got multiplayer setup but at the moment it only runs as a client-server without running a dedicated server. What's the difference? Is it basically like a Minecraft server if I run a dedicated server?

sterile plaza
#

you can have a dedicated server
or a listen server, which is a server with a client as well
or client only

#

what you can run into, is writing code that assumes there is a host player who can do things that dedicated clients can't
which is what the last game my company made did :/

#

I suggest you write code assuming dedicated server.

latent heart
#

Don't assume dedi server. Don't assume listen server. Account for each.

sterile plaza
#

If you support dedicated server, listen server is trivial in my experience.

#

Very little code needs to be written specifically for listen server. Some, but not much.

latent heart
#

Even so. Just don't make assumptions.

#

Well written code will work no matter if it's a dedicated server, listen server, client or standalone.

sterile plaza
#

Mostly I have past trauma from working on a game that assumed p1 was host and would shortcut things, because no one at the studio had worked with UE before and didn't know any better (ish).
My workflow is to always run PIE in "play as client" because it guarantees you don't write player code differentiates between host player and client player. And in the case that you mess something up, it's WAY easier to fix things to support listen server than writing for listen server and then trying to fix it to support client.

uneven lion
#

I am still confused how I am supposed to allow switching servers... I have tried Join Session > Destroy Session and also Destroy Session > Join Session but neither way works.
If I do join first, I get error can't join twice on a server I've previously joined.
If I do destroy first, I get error can't destroy a null session even when in an active session (2nd joined session).
It seems neither way is right, and neither allows me to go from Server A > Server B > Server A

uneven lion
#

This doesn't work either ??

image.png
#

It's a button that when I click it, it checks if my SessionState is NoSession. If there's no session, no need to destroy first. In theory this is fine.
I press the button and go from Server A > Server B. That parts work.
Now in Server B I press the button (which now points to Server A), and get back a new error LogOnlineSession: Warning: STEAM: Failed to respond IP:<Redacted>

shy slate
#

I have a local multiplayer setup for a UE5 project allows me to control one player with keyboard and one player with a gamepad. I have recently upgraded the project to 5.1 and noticed that in this version both the keyboard and the gamepad control Player One.

Looking at the player controller assigned to the two characters there are two different player controllers, both appropriately assigned Player Controller 0 assigned to Player BP 0 and Player Controller 1 assigned to Player BP 1.

Has anyone else had issue with multiplayer in the 5.1 version of the engine?

dark edge
shy slate
dark edge
#

maybe the settings to route gamepad to player 1 got reset

shy slate
#

do you mean this Skip assigning Gamepad to Player 1 flag?

civic seal
#

Hey guys, how would you go about making a series of potentially really common events reliable? My employer demands that impact effects play 100% of the time on a really high projectile count, and I'm just brainstorming how I can get this working. I am considering creating an array of necessary data to be stored as event history, but my issue with this is that at one point this array will become beefy enough to overload the reliable RPC on a client receiving it for the first time (connecting midgame)

The obvious answer is to periodically empty this array, however if I fully empty it there will be a periodic window where events will not fire off and this will not be truly reliable. If I alter the array gradually, this will confuse the delta replication.

Any ideas?

mortal mica
#

oh, you mean past impacts? like scorchmarks left on the world?

civic seal
#

Sorta, there's just more data in the RPC than the projectiles normally have

#

a projectile state update is 128 bytes, and all the stuff it holds is super compressed. This is fine for movement, but impacts would look scuffed with 16bit floats

glass vector
#

how do you control where the player controller gets initially spawned in multiplayer? I have this problem where there is a short delay between spawning and possessing a pawn in multiplayer, and the player controller is initially spawned somewhere and the player can see stuff I don't want them to see

modern swift
#

Does ServerTravel for dedicated server need "?listen" for MapName?listen

toxic falcon
loud frost
#

Hey i am new to multiplayer , i want to know what is the best way to use realtime database , like firebase sql ?? What are these please clear my doubt

neon mango
#

So I wrote gameplay code using Niagara simulation stages which works great for me to optimally do some essential gameplay calculations but since the Niagara particles won't render on a dedicated server where can I write such optimal GPU code so that it doesn't get ignored by dedicated server?

#

I'd maybe try to move it to a GPU Compute shader but would a dedicated server use the GPU even then?

unique cloak
#

Is it ok to replicate a hit result? It’s from the server

prisma snow
hushed mauve
#

Is is possible to create a component that is located in the server module, and then attach that to one of my clients, so this component exists only on the Client from the server side but not the client side?

hushed mauve
#

I would guess that i have to disable the replication of the component

prisma snow
hushed mauve
#

So it would be possible that for example my character have a server only component attached to it, and only the server can access it

#

For that the replication needs to be disabled right?

prisma snow
hushed mauve
#

Would this component then also be in the memory of the client?

#

I would guess no

prisma snow
prisma snow
hushed mauve
vague ocean
#

do server rpcs get called out of order? Im setting ownership of an actor on the server and then doing an interaction on it, but on the very first time it says no owning connection

#

after that its totally fine

prisma snow
vague ocean
#

this is what I have

#

TakeOwnership is (Server, Reliable), and so is ServerInteract

#

all takeownership does is if(HasAuthority() {interactable_object.SetOwner(this))

#

this is the player character

neon mango
prisma snow
neon mango
#

That's quite the statement? Most AAA games don't disclose how they do things

vague ocean
#

what reason do you have for that?

#

if it works for you, im not against it haha

#

ive just never heard of it

#

unless you have like high intensity ai pathing algorithms running which need lots of matrix multiplies?

prisma snow
# neon mango That's quite the statement? Most AAA games don't disclose how they do things

Well, to begin with, the number of scenarios in which GPU computing power is really needed are very few. Most AAA games use dedicated servers so relying on GPUs does not make sense. Also, while GPUs can process lots of data quickly, the communication between CPU and GPU is often a bottleneck so relying on a GPU simulation is also not ideal.
And finally, most AAA games are GPU bound so why remove processing from CPU to give more work to GPU

neon mango
#

I need to be able to count how many pixels of a certain color are in a texture pretty much every frame.

Doing this with read pixels is painfully slow for a hires texture.

prisma snow
#

This is under the assumption that the GPU is reliable enough as to produce good results for game logic

prisma snow
neon mango
#

For a gameplay mechanic

prisma snow
#

cannot you mimick the functionality using an array and some C++ logic?

neon mango
#

Not for the accuracy I'm aiming for.

#

And having it run smoothly on quest 2 hardware

prisma snow
#

which is the gameplay mechanic exactly?

neon mango
#

But I guess if I'm doing dedicated server I can have a beefy server that perhaps can handle that using CPU read pixels

#

So that means I can do a dedicated server version and a P2P version of the calculation

#

Because no quest 2 would be a dedicated server

#

So I guess it's not an issue

#

Well I'll have to test that to be sure

#

Splatoon like territory score, counting the color of each team on map.

I tried various solutions but it was all with the intent of those solutions running well on quest 2 hardware but a PC running a dedicated server may be able to use one of my other solutions

vague ocean
#

oof that'll be extra tough to run anything on that snapdragon gpu

#

i wish you luck

neon mango
#

It's been tricky but this may be why Splatoon also was just P2P

#

Has to run on a switch

#

I've gotten pretty far mechanically but trying to cover all bases. think I over reacted to needing to use GPU on a dedicated server, but at least I know that it's not possible. Of course I'll have more resources on such a machine so CPU work like that might be ok.

vague ocean
#

@prisma snow from chatgpt, how reasonable does this sound?

#

does ownership replicate out like that?

vague ocean
rose egret
#

is it possible to connect by a static id when using OnlineSubsystemNull and open command ?

#

I want to game players a unique name for save load system

prisma snow
#

Or test it yourself to be sure

cinder orbit
#

I'm confused why this parameter logItem's value becomes undefined after the initial run on the server during a multicast call. I have the param's class set to replicated and in debugger it is set correctly for the server side but when it goes to execute on the client now the param is undefined:

#

This event is called from the server

fiery eagle
#

HI I am having a bit of issue using UpdateSession in steam when i try to call update session in Post login of GameMode the hosted game stops showing in the find Server widget, I am using using trying to use Update session to update no of player count. Am I doing something wrong here.

twin juniper
#

TRying to setup a simple name system for when a player is in the lobby sets a username then when joins into the map the name is displayed, been trying to set this up but with no avail...any ideas?

molten matrix
#

Seamless travel supposedly persists the game mode. How does this work if I have a different game mode set up for the other map? Will there be two game modes? Will the new game mode not be created? Is there a way to switch it out for the new game mode?

vague ocean
#

how do you call a c++ server rpc in blueprint?

sinful tree
#

It would need to be set up as Blueprint callable in C++, then you would just call it like any other node iirc.

cinder orbit
#

Is it an issue that the character created for my host player (player 1) doesn't have a controller assigned? (e.g. the character for player 1's client). I can still move around as player 1 and such but in a 2 player multiplayer session, there's 4 player characters listed in debugger (2 client-side & 2 server-side) and only 3 player controllers (1 client-side & 2 server-side).

civic seal
#

Hey guys, need a little help tackling a problem. Some of my actors do not appear to replicate - everything about their replication is set up according to the way you're meant to do it - i.e. marking a property as replicated and introducing the LifetimeReplicatedProps line to get it added. Now, it seems to me that due to some condition some actors simply won't ever replicate, while other actors of the same class will do so smoothly, without a single problem.

I'm aware that it's a pretty broad description, but I'm kind of at a loss and I'd really appreciate a nudge in the right direction as to what it could possibly be.

prisma snow
civic seal
# 
ASpellProjectileSystem()
    {
        ProjectileSystemNiagaraComponent = CreateDefaultSubobject<UNiagaraComponent>("Projectile System Niagara Component");
        ProjectileSystemNiagaraComponent->SetForceSolo(true);
        ProjectileSystemInstancedMesh = CreateDefaultSubobject<UInstancedStaticMeshComponent>("Projectile System Instanced Mesh");
        RootComponent->SetMobility(EComponentMobility::Static);
        ProjectileBody->SetCollisionEnabled(ECollisionEnabled::NoCollision);
        bAlwaysRelevant = true;
        NetUpdateFrequency = 48;
        MinNetUpdateFrequency = 24;
    }
prisma snow
civic seal
prisma snow
#

do you call the super constructor?

#

I don't see it in the snippet

civic seal
#

👀

#

I was under the impression the constructors get appended not replaced

#

why the hell does it work

prisma snow
#

maybe I'm wrong

civic seal
#

the components get names set in the parent constructor so it would logically follow that they get appended

civic seal
# prisma snow maybe I'm wrong

no its okay, every little bit helps. I am just very confused and have no idea where to start looking for reasons for it breaking

prisma snow
#

yeah since the parent constructor has no parameters, it is automatically called

civic seal
#

It's systematic in the sense that some actors' properties do not get replicated

#

the RPCs however still get called

#

I am fairly certain my network is not crowded

prisma snow
#

do reliable RPCs get called?

civic seal
#

For that specific actor? I don't think I have any

prisma snow
civic seal
#

however other reliable RPCs do, with zero issues

prisma snow
#

are your actors instantiated by the server always?

#

do the replicated properties get set in the server?

civic seal
#

Yup! These are always spawned by the server

#

Yup

#

The client never touches the replicated properties, only reads

prisma snow
#

ok good

#

and it is always the same properties?

civic seal
#

Yup

prisma snow
#

or the same actors?

lost inlet
#

And what data type is the property?

civic seal
# prisma snow or the same actors?

These actors are dynamically spawned but it does not seem to depend on any particular class. Seems random. Sometimes it takes with zero issue, sometimes it just never replicates

civic seal
#

Wow thank you

#

No, this is clearly not a replication bug, it's me being an idiot. Thanks so much for making me look. I completely forgot I wrote this system

#

The actors are not responsible for their info getting replicated

#

Just the one master property

#

Responsible for all the actors' projectile data

#

therefore if some get replicated and others do not, the issue is the way I compose them

#

thanks a whole bunch

#

no fr it would take me hours to look at the properties and see them commented out and replaced with the other thing

#

ily

prisma snow
#

well problem solved

#

I think

#

🤣

civic seal
#

well, partly. I now know where it has to be

#

which is as good as solved

#

❤️

tranquil swallow
grave lynx
#

Hey, My gamemode is calling a client rpc function inside PlayerController for UI stuff with a array in parameter. But on this owning client function, the array is empty, but there are some data just before in the gamemode, any idea?

fossil spoke
grave lynx
#

Here is my array in the gamemode storing players infos TArray<FPlayerInfo> PlayersInfo;

On post login, we are asking to all PlayerController to update UI

for (const auto Player : ConnectedPlayers)
{
    Player->UpdateLobby(PlayersInfo);
}

UpdateLobby FUNCTION(Client, Unreliable) void UpdateLobby(const TArray<FPlayerInfo>& PlayerInfos) si inside the PlayerController. So I'm trying to print something from the struct, it's working on the server but not on the client

latent heart
#

Why is it unreliable?

fossil spoke
#

Show ALL the code, its not helpful to just cherry pick little bits.

grave lynx
#

it's ui stuff, does it need to be?

fossil spoke
#

Also PostLogin maybe to early to call an RPC as the Actor on the Client may not have been created yet.

#

Depending on network conditions

latent heart
#

Why not just put the array on the gamestate and use an onrep there?

#

That's where info shared between playerrs should probably be.

grave lynx
fossil spoke
#

All the relevant code

#

Dont need to paste your entire gamemode

grave lynx
latent heart
#

You don't need an rpc. what is UpdateLobby meant to be doing?

grave lynx
#

well calling HUD functions to update widgets

latent heart
#

Right. And what is FPlayerInfo?

#

Justr a struct?

grave lynx
#

yea with players names, ready status...

#

maybe I should try another approach

fossil spoke
#

That information should be handled by the GameState TBH.

#

Probably even PlayerState since its just generally talking about the state of a Player.

latent heart
#

That info should be on the playerstate

grave lynx
#

ok I see

latent heart
#

Information about player -> playerstate. Information about game -> gamestate. Game Flow -> Gamemode. Player flow -> playercontroller.

grave lynx
#

true, so in my case, if a data has change, does the PlayerState has to the update widgets?

fossil spoke
#

Widgets should generally be reactionary, in that they change based on something changing elsewhere. Utilizing things like Delegates enables Widgets to bind to important events without specific classes having to push that info directly to the Widget.

latent heart
#

E.g. using onreps to trigger updates in widgets via delegates.

grave lynx
#

you right, I did it for Health stuff with onRep so yea, I see

#

So like all the clients have to know these struct, I could do this with the OnRep and a delegate

modern swift
olive crow
#

is there a way to call a run on server event from non-owning client?

fossil spoke
#

RPCs need a net owning connection to be called.

#

This means it must pass through something like a PlayerController (Possessed Pawn and PlayerState are owned by the PC so are also included there).

latent heart
#

You can do server rpcs on the gamestate?

fossil spoke
latent heart
#

🙂

sterile plaza
#

Essentially player controller or anything owned by the player controller.

fiery eagle
#

Hi Guys Iam having a bit of issue here```cpp
void URaceGameInstance::CreateSession()
{
if (SessionInterface.IsValid())
{
LastSessionSettings = MakeShareable(new FOnlineSessionSettings());
if (IOnlineSubsystem::Get()->GetSubsystemName() == "NULL")
{
LastSessionSettings->bIsLANMatch = true;
}
else
{
LastSessionSettings->bIsLANMatch = false;//change true for NULL
}

    LastSessionSettings->NumPublicConnections = 4;
    LastSessionSettings->bAllowJoinInProgress = true;
    LastSessionSettings->bAllowJoinViaPresence = true;
    LastSessionSettings->bShouldAdvertise = true;
    LastSessionSettings->bUsesPresence = true;
    LastSessionSettings->bUseLobbiesIfAvailable = true;
    LastSessionSettings->BuildUniqueId = 1;
    LastSessionSettings->Set(SERVER_NAME_SETTING_KEY, DesiredServerName, EOnlineDataAdvertisementType::ViaOnlineServiceAndPing);
    const ULocalPlayer* LC = GetWorld()->GetFirstLocalPlayerFromController();
    if (LC)
    SessionInterface->CreateSession(*LC->GetPreferredUniqueNetId(), NAME_GameSession, *LastSessionSettings);
}

}
void URaceGameInstance::FindGameSessions()
{
SessionSearch = MakeShareable(new FOnlineSessionSearch);
if (SessionSearch.IsValid())
{
SessionSearch->bIsLanQuery = IOnlineSubsystem::Get()->GetSubsystemName() == "NULL" ? true : false;
SessionSearch->MaxSearchResults = 100;
SessionSearch->QuerySettings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals);
const ULocalPlayer* LC = GetWorld()->GetFirstLocalPlayerFromController();
if (LC)
SessionInterface->FindSessions(*LC->GetPreferredUniqueNetId(), SessionSearch.ToSharedRef());
UE_LOG(LogTemp, Warning, TEXT("[GI]Searching Session"));

}

}```

# 
void URaceGameInstance::OnSeassionSearchFinished(bool bWasSuccessful)
{
    if (bWasSuccessful && SessionSearch.IsValid())
    {
        TArray<FServerData> ServerNames{};

        UE_LOG(LogTemp, Warning, TEXT("[GI]Searching Session Finished"));
        GEngine->AddOnScreenDebugMessage(-1, 3.0f, FColor::Green, TEXT("[GI]Searching Session Finished"));
        for (const FOnlineSessionSearchResult& SessionResult : SessionSearch->SearchResults)
        {        
            FServerData SData{};
            SData.Name = *SessionResult.GetSessionIdStr();
            SData.MaxPlayer = SessionResult.Session.SessionSettings.NumPublicConnections;
            SData.CurrentPlayers = SData.MaxPlayer - SessionResult.Session.NumOpenPublicConnections;
            GEngine->AddOnScreenDebugMessage(-1, 3.0f, FColor::Green, FString::Printf(TEXT("NumOfPlayer: %d"), 
SData.CurrentPlayers));

            SData.HostUserName = SessionResult.Session.OwningUserName;
            UE_LOG(LogTemp, Warning, TEXT("Found Session Names : %s"), *SessionResult.GetSessionIdStr());
            FString ServerName;
            if(SessionResult.Session.SessionSettings.Get(SERVER_NAME_SETTING_KEY, ServerName))
            {
                SData.Name = ServerName;
                //UE_LOG(LogTemp, Warning, TEXT("Data Found in SessionSetting: %s"), *TestData);
                GEngine->AddOnScreenDebugMessage(-1, 3.0f, FColor::Green, TEXT("Data Found in SessionSetting"));
            }
            else
            {
                SData.Name = "Could not Find ServerName";
                //UE_LOG(LogTemp, Warning, TEXT("Data Not Found in SessionSetting"));
            }
            ServerNames.Add(SData);
        }

        if (Menu != nullptr)
        {
            {
                Menu->SetServerList(ServerNames);
            }
        }
    }
}```
#

SessionSearch->SearchResults is Shoing Empty when Run from steam but if run locally using powershell using these command -game -log -nosteam every thing works fine please help.

#

also iam using UpdateSession which is causing the list to be empty on steam removing it from the code make the Search results available on steam but my player count does not update then.

ionic coral
#

steam sessions or advanced sessions causing client side to have bad rubberbanding

#

any fixes?

unique cloak
agile loom
fiery eagle
native axle
#

Oh I was looking at the wrong code, specifically seems you are missing Settings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals);

fiery eagle
#

@native axle Thanks for the link men did you check my code include above maybe i have done something wrong

native axle
#

in ur FindGameSessions

fiery eagle
#

@native axle SessionSearch->QuerySettings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals); this code is there in FindGameSession look

#

Will match my code to the link you provided.

native axle
#

Ah wrong line

#

try this one then Settings.Set(SEARCH_LOBBIES, true, EOnlineComparisonOp::Equals);

fiery eagle
#

@native axle Will add these lines test and update my men

twin juniper
#

why is my debug message showing on all clients?

#

i tried doing is locally controlled but still doesn't work

fiery eagle
#

I do know much of this but i think there is a node call switch on authority maybe try that

olive crow
glass vector
#

will begin play be called on the GM and player controllers on seamless travel to the destination map?

viral phoenix
#

hey guys, im having problems with my gamepad inputs reading as keyboard and mouse inputs.
im using some off-brand playstation controller wanting to make a local multiplayer splitscreen game but UE keeps reading inputs from the gamepad (intended player 2) as keyboard and mouse inputs and making the character of player 1 do stuff. i have "skip assigning gamepad to Player 1" checked

This used to work for me but then one time when playing in the editor it just stopped working and ever since ive had this issue

unique cloak
zenith wyvern
#

I want to store a log of messages, which can be generated by client or server, was hoping for tips on best practice

#

I guess I would have an event 'run on owning client' like 'add to log'

#

so both client and server store it client side only? it doesnt seem like replicating the log would work, or else the client has to rpc all its log msgs

agile loom
fiery eagle
#

@native axle Tried modification using as you recommended it doesn't seems to work also are you using UpdateSession anywhere because using it seems to break the find search results

unique cloak
#

so only the hit actor

#

but isn't an overkill to make a struct for this?

agile loom
quartz star
#

Hello im trying to replicate the float Variable "CurrentHealth" in an ActorComponent in cpp, but it gives me an error
Can someone help me?

image.png
plush lotus
#

Hello, I need help 😦

#

just for test purpose i write that

#

what i expect is to have 1. split screen with 2 players.
Player 1 (0) posses vehicle 01
Player 2(1) posses vehicle 02

#

on the result i have split screen

#

i have my two character on the map

#

but the controller 1 control the vehicle 01

#

but the controller 2 doesn't do anything

#

also trying to do that with keybard and controller 1 only : si i remove that parametters but same result

#

keyboard and controller 1, control vehicle 01

#

and controller 2 doesn't do anything

#

i have the split screen and each split screen has a camera following the vehicle

#

but impossible to move vehicle 02

rancid badger
#

next time please write it in one message

unique cloak
plush lotus
#

ha sorry

rancid badger
#

haha

plush lotus
#

lot of people told me that... hahaha 😄

rancid badger
#

😹

steady cape
quartz star
steady cape
#

UCoreHealthComponent::

...TIME(ACoreHealthComponent, ...

quartz star
steady cape
#

I was trying to hint at it

plush lotus
quartz star
#

i found it

steady cape
#

👌

agile loom
unique cloak
#

yeah but I wat to call it from destroyed

#

destroy is called locally I think

#

also

#

Also because of lag I think it would be better to call it locally

agile loom
unique cloak
#

oh so the function will be called on all machines

agile loom
unique cloak
#

I mean the effects function

agile loom
#

This is the easiest way to implement the destroy effect

image.png
fiery eagle
unique cloak
#

also why the client can't know about it? if it doesn't pass its own hit result to the server it should be ok right?

agile loom
agile loom
unique cloak
#

The server handles that and replicates it to the clients

#

I am talking about the hit result

agile loom
unique cloak
agile loom
unique cloak
#

actually let me check

#

and the destroy calls the effects function

agile loom
unique cloak
#

it is

#

and it calls destroy

agile loom
agile loom
unique cloak
#

Why the server cant replicate the hit result though?

#

the clients cant modify it

#

I also replicate health I think, it doesn't mean that they can chat and change the health to 100000 hp lol

agile loom
# unique cloak the clients cant modify it

Use Destroyed() function

void AMyActor::Destroyed()
{
    if (GetWorld()->HasBegunPlay())    // <-Important
    {
        // Example
        FFXSystemSpawnParameters SpawnParams;
        SpawnParams.WorldContextObject = GetWorld();
        SpawnParams.SystemTemplate = DestroyParticle;
        SpawnParams.Location = GetActorLocation();
        UNiagaraFunctionLibrary::SpawnSystemAtLocationWithParams(SpawnParams);
    }

    Super::Destroyed();
}
agile loom
unique cloak
#

I am replicating the variable

#

my only concern is cheating

agile loom
unique cloak
#

ok thank you so much!

edgy helm
#

Hey, can anyone offer help regarding sound components not properly replicating to clients in multiplayer? Neither running it on server or multicast works.

plush lotus
#

no one can help me on my little issue?

plush lotus
#

the forum help me a little. If i create my character inside the beginPlay Event, It doesn't work! But if i put a delay on it.. it work... where am I supposed to create my characers if it's not on the begingPlay of the GameMode?

#

i have to use a isValid?

fiery eagle
#

SData.CurrentPlayers = SData.MaxPlayer - SessionResult.Session.NumOpenPublicConnections; bugged for sure if called using UpdateSession the current session disappears from the steam server, and this error persist in many forums as i searched so sad its still there only custom solution works.🥹

viral phoenix
calm prawn
#

Hi. I'm creating a multiplayer session but everytime when I create the session on server side, the client opens the map automatically. What could be the reason?

grave lynx
#

Hey, I'm trying to update a widget using a value from the GameState using a delegate (working fine on server). But the event is not fire on the client.

here is my function inside the GameState;

void AMyGameState::TickLobbyTimer()
{
  LobbyTime--;
  OnLobbyTimerUpdate.Broadcast(LobbyTime);
  if (LobbyTime <= 0)
  {
    // End
  }
}

OnLobbyTimerUpdate is bind on contruct on the widget:

void UWLobbyMenu::NativeConstruct()
{
  if (AMyGameState* GS = Cast<AMyGameState>        (GetWorld()->GetGameState()))
  {
    GS->OnLobbyTimerUpdate.AddDynamic(this,               &ThisClass::OnTimerUpdate);
  }
}

But nothing is printed inside OnTimerUpdate function, any idea?

fossil spoke
#

Have you verified by breakpoint that the binding to the delegate is happening?

#

The GameState maybe invalid?

grave lynx
grave lynx
fossil spoke
#

Is TickLobbyTimer being called on the Client?

grave lynx
fossil spoke
#

Huh?

#

Its a function, why would that mean its only being called by the Server?

#

Where is TickLobbyTimer being called?

grave lynx
fossil spoke
#

Ok so you know the GameMode only exists on the Server correct.

#

With that fact, how do you expect the delegate to be called on the Client?

grave lynx
#

Ok I see, I thought that as a delegate was fire on the GS, It could works for clients too

fossil spoke
#

Thats not how it works.

#

The GameMode should not be calling this function.

#

The GameMode defines the rules of the game. Not its state.

#

The GameState handles state

#

The GameMode could tell the GameState to move into a different state.

#

But it shouldnt be managing state things for it.

#

The better approach would be to have some sort of variable that says "Im in the Lobby State"

#

In the GameState

#

Which the GameMode could tell it to move to.

#

Then inside the GameStates Tick function, call TickLobbyTimer if its in the Lobby State.

#

The variable would be replicated, so that when its changed, the Client can the know its moved into the Lobby state and start ticking that function.

#

Which in turn would call the delegate.

#

For the Server and all Clients.

grave lynx
#

ok so the timer inside the GS is in the right place, just the way of calling it is wrong.

#

for me, the difference betwen states and rules is difficult. To choose between GS and GM

visual glen
#

Anyone happen to know why I may be getting these errors in the Server and Client logs? I started the cook for Server and Client after the CameraComponent was addedand still getting this...

image.png
sinful tree
# grave lynx for me, the difference betwen states and rules is difficult. To choose between G...

I'd say Game Mode is usually more about Player Spawning rules than the full rules of a game.

If you think of game modes like "Deathmatch", "Capture the Flag" or "Team Deathmatch" in which case you would probably need a differing set of rules for spawning (ie. a diffferent Game Mode as "Deathmatch" players could likely spawn at any spawn point on the map, where Team Deathmatch you likely have designated areas for the teams) as well as a Game State to go along with those different game modes to keep track of differing elements like timers and scoring that could be shared with clients.

Change the game mode, you're also changing all the other options it provides, like what's the default Pawn Class, Playerstate, etc. So in that sense, it's also about changing those kinds of rules about the game. What you may want to put in the game mode for the examples I gave above if you're dealing with an end of round timer, is what happens when the timer in the game state reaches 0:00 - different game modes may want to move to a new map, while other game modes may keep the existing map, reshuffle the teams, and reset the scores in the game state. Then you could have multiple gamestates that have that same timer ending, but the selected game mode then decides what happens next rather than having the gamestate itself decide.

#

In the end, if it's something that needs to be shared with clients and there should technically only be a single value that exists for everyone, GameState is the place to put the value.

subtle peak
#

Hey there. I am trying to replicate my grenade, but the "set linear velocity" is not being replicated. Do physics like this need to happen on multicast? Isnt there the possibility then of the grenade being in different locations on different clients?

image.png
fossil spoke
subtle peak
#

Tried the "Set life span" node

mortal mica
#

question about the CMC, if I understand the code correctly, for simulated proxies the clients do a simplified simulated movement (basically use the last received position and velocity to calculate a new one), and moves the capsule (and hence the actor) there. And then when a network update is received it lerps towards the server's position, but this is only applied to the mesh component, not the root one.

What's the reason behind this? Couldn't the root component be lerped to the new server position + whatever local simulation is done in the next ticks?

edgy helm
#

Hey, can I get an explanation on replicating sound components, playing audio, and media sound to clients? Everything I tried so far doesn’t work (run on server, multicast).

loud frost
#

Can i get json data of firebase by Varest by using firebase web api call ??

glossy kettle
#

idk what varest is but jus writ a HTTP req w the engine http thing

silver remnant
#

Hello guys, I have a problem I am making a online game with 2 maps on it, problem here is that the 1st player goes in the door while other player did not, all of the sudden the new map pulls all players who are in the first map. How to fix this?

native axle
#

I have a component on my GameState and want to call Server RPC on it from a Client. But it won't let me because the client doesn't own the GameState? Do I need to make a Server RPC function elsewhere (like the PC) which just calls the component's function, or is there some way around this?

oblique flicker
#

Hello! Can someone help me with some information? I'm trying to learn multiplayer and I'm stuck in (probably some noob things) the Lobby

marble gazelle
silver remnant
marble gazelle
#

also you need to pass the IP, not the level

#

the server has to be started with the correct level already

silver remnant
#

Sorry I forgot to screen shot that

#

@marble gazelle Here is the function that calls the server

image_5.png image_6.png
marble gazelle
silver remnant
#

Server and the cast to Character is the client

marble gazelle
silver remnant
forest bolt
#

Hello guys, I'm facing a really weird issue with sockets here. I have a dev in my team which can join any session, but when he hosts we fail to connect to his session (it shows up after FindSessions. His firewall is turned off.

#

(We're using P2P with PlayFab+Steam)

true spade
#

Hi, I have a question for the Host migration, is it possible to create it for the P2P connections? I want to create it, so when host leaves the game just assign one of the clients as a new host, if possible with the existing player locations. Therefore, what is an idea (or steps) of (re)creating it?
Thanks in advance 🙂

hushed heart
#

Hello! I have a bit of a general question, happy to read any docs or anything that point to more general advice on the subject as well as direct answers to my issue. I'm replicating some movement (not using the CMC here by the way, wish I could) as well as allowing the client to perform it too, so that I can prevent input lag. However, I think that's a naive way of doing it, as I'm experiencing that when there's proper latency, the two sides constantly fight the minor desyncs and so it just leads to barely playable jittery rubber banding.

What might be the best practise here? Whilst I know client side prediction can be a big old rabbit-hole of a subject, is this a completely wrong way to go about it? Is it maybe just a matter of reducing how often the server is replicating the movement, or something more complex? I essentially want to retain both the client-side movement being allowed to eliminate input delay whilst also retaining the server's authority, but not have any of this horrible jitter when there's some latency. I understand that eliminating any rubber banding at all when there's a huge amount of latency is impossible, but I think the amount I'm experiencing currently means there's obviously something wrong that I'm doing. Thank you!

surreal plaza
#

Is anyone familiar with how to best handle timers in multiplayer? My main timer is run from the server, but is there a best practice for how to handle timed events client side? Should it wait for server side RPCs when it fires or should I trust the local timer for local effects?

clear island
#

whats the most reliable way to know as a client, when another client has joined the server?

#

is the BeginPlay of my PlayerState class a good place to check it?

marble gazelle
clear island
latent heart
hushed heart
# hushed heart Hello! I have a bit of a general question, happy to read any docs or anything th...

Following up on my own research which I've been doing all day more or less.
Okay so quite clearly my issue is that since it's the client's input that instigates the movement, when there's significant latency the server obviously receives everything late, meaning compared to the client it's living in the past. But because the server is the authority the client is jumped back in the past by however much latency there is, as it's being corrected based on outdated information. So, I suppose my next question to ask is: is a sensible way of mitigating this, doing one of the following?:

Rather than correcting the position on the client based on their current position, should I check first to see where the client was xxx ms ago (dependent on latency), then only correct if that's wildly out of place? Or should this check instead be done in reverse? As in, on receiving the replicated position, get the server's velocity and direction too, extrapolate forwards xxxms, and correct to that position instead?

The flaw with the first one is I see there might be the potential for problems with huge desync if they move very far, and it could lead to it getting worse. The flaw with the second solution to me is thati f the player changes direction or velocity suddenly, like, accelerating to reversing for example, there would be pretty extreme desync, so I'd maybe also have to account for changes there? Aaaa. Any pointers would be super helpful, thanks!

subtle peak
#

Hey what do you guys do with the character capsule after death?
If I disable collision on it, the unit falls through the ground

image.png
surreal plaza
# latent heart Depends ™️

I am building a metronome that will fire exactly every x seconds. I will fire important code from the server, so, like, "earn new resources," but for things like, "player sees a few coins drop onto their pile" cosmetic event, should I just do that as an on rep and be done with it or try and provide a more accurately timed event client side using a local timer. While cosmetic, I fully depend on players wanting to see that event as closely as the actual time as possible in my situation.

latent heart
#

You can predict that clientside np. They can play the animation, even update the gold count, but when they try to spend the gold, the server will have to say yes or no.

#

If you do it with an rpc, the rpc isn't guaranteed to arrive quickly or consistently.

surreal plaza
latent heart
#

Not that I know of.

#

But the game state does have a server time variable which you could leverage to make it start at the beginning of a second or something.

#

They should be as synced as possible.

#

If your tick is every 5s and it starts at 00:00:01.23 just make the first tick 3.77s. .

surreal plaza
marble gazelle
latent heart
jade patrol
#

hey, how do i replicate an actor to all but not the owner? for example i have a locally predicted ability that spawns bullets but i don't want for the bullets to be replicated back to client. I can hide it with owner no see, but is there a way to just skip the replication?

chrome bay
#

You mean a property not the entire actor presumably?

#

If so use COND_SkipOwner

#

Or you override IsNetRelevantFor and add your own settings

#

There isn't a built in way

jade patrol
#

ok, i see

molten juniper
#

Hi all, is the only way to replicate control rotation to all clients by an unreliable netmulticast in the pawns tick?

chrome bay
#

No, a replicated property would be far better

#

Not sure why you'd need to though

#

Control Rotation is a controller-level concept, which itself isn't relevant to other clients

molten juniper
#

How else would you replicate a gun aiming up and down

verbal tendon
#

you dont

#

is this for a playergun?

molten juniper
#

ya

verbal tendon
#

you get the baserotation

#

and have your ABP do the rest with aligning the gun

molten juniper
#

Yeah but let's say in this weird situation there isn't animations

verbal tendon
#

I'd recommend to stop being weird 😄

#

Also you can just have something that aligns your gun ifyou have no anims

molten juniper
#

I wish I could but man I just collect my paycheck and dont ask questions

rose egret
#

@molten juniper typically you replicate aim direction in actor/pawn if needed, depends on game

rose egret
frank birch
#

how could I handle a player (ACharacter) "crashing" into another and "pushing it"? 🤔
maybe a serverside collision check and a launch? or addForce? 🤔 What replicates best on ACharacter? Launch or Addforce?

fiery eagle
#

Guys can anyone confirm this works or not SessionResult.Session.NumOpenPublicConnections iam tryingto find solution to this but iam unable to solve it this always return Num() =1, iam able to join create and find the session but this Line of code is only not working iam tryingto run this on steam.

gloomy tiger
#

Any inputs you guys have 'bout dispatching FHitResult over the network when it comes to weight?

#

Trying to predict weapon firing/shooting and am slightly afraid of how overwhelming that could be

prisma snow
prisma snow
#

I've only read about the topic, maybe somebody has more experience and can point out to resources

gloomy tiger
#

Unfortunate terminology

prisma snow
#

Well I would not worry unless you're sending it very very frequently

#

At the same time, sending the whole struct seems a bit unnecessary

#

better pack it in your own struct with the data you need

gloomy tiger
#

It is - I'm going to compress it into a smaller, network-friendly struct

#

But

prisma snow
#

Sounds reasonable

gloomy tiger
#

Ignore the "but" - got an idea while typing lol - anyways, thank you for your input @prisma snow! 🌟

prisma snow
rough kernel
#

i have a weird question, i have a struct array i want to replicate, this struct has a number of sub structs with additional data, i only plan to put data into 1 of these sub structs for each array member (the rest will stay at default values)

would making these sub structs each an array and leaving the array empty cut down on the amount of data that is replicated?

#

and where i want there to be data just add a single member and put my data there?

#

in theory it sounds like it would considering the fact those default values in the other sub structs would be concidered for replication, which is undesirable as they are unused in this case

visual glen
#

anyone know if the original action/axis input mapping doesn't work in multiplayer for 5.1? for some reason in editor my two players can move but not in a client connected to a dedicated server...

quasi tide
#

Input is entirely local. There is something else that is happening.

visual glen
#

That's kinda what I was thinking, but it's weird bc I can see the other client spawn in and disconnect, so I know it's not frozen

#

for more context I'm using

SetReplicates(true); SetReplicateMovement(true);

for the .cpp to replicate movement and

void MoveForward(float Val); void MoveRight(float Val); void LookUp(float Val); void Turn(float Val);

in the .h to control movement in the client

#

but it works in editor which is why I am currently sus

mortal mica
#

it should work

#

make sure you are setting the input mode to Game

#

on the connected player controller

prisma snow
#

maybe using a FFastArraySerializer

rough kernel
#

this is unfortunately just in blueprint and using RPCs to send single members of the array w/ array index

#

the struct having a byte to determine a type, and then a sub struct to hold the data for that types stuff

prisma snow
hushed heart
#

Hello! I'm back again! My previous questions have had me reading up about client side prediction all day, which had been a very good learning experience. Finally bothered to sit down and read through the entirety of the explanation doc regarding the CMC, which was neat and a headspin. I'll have to comb through the code, and will do so tomorrow, as I've figured I'm going to probably have to implement a simplified version of its saved moves buffer.

I have one simple question that'll really help get me on my way though: whereabouts on the client does the engine correct a replicated actor's position/rotation/velocity? I'd like to be able to override/disable it so I'm in control of corrections myself. All of this is on aid of ensuring movement on the client isn't being corrected by outdated data when there's latency.

Thank you!

surreal plaza
#

In the case of a multiplayer game where players have to hold a button to, say, charge a capacitor that might take 5 seconds. For those clients, are they sending a bunch of server requests every 10th of a second or something for that buildup? I ask because that seems excessive.

visual glen
mortal mica
visual glen
#

I'm setting it on BeginPlay

mortal mica
#

BeginPlay for whom?

visual glen
#

I am however connecting to the dedicated server by putting "127.0.0.1" where the command line arguments go, which seems to connect

#

BeginPlay on the PlayerController

mortal mica
#

yeah that probably wont work

#

not sure

#

but try putting it after OnPossessed

visual glen
#

Will do, and now that I think about it, forgot to put the new PlayerController on the gamemodebase 🤦‍♂️

mortal mica
#

🙂

mortal mica
#

it could just be that you forgot to set the override 😛

visual glen
#

yea trying it now with the right PlayerController attached to the gamemodebase, takes a while cooking the client and server on this computer old_man_yells_at_unreal

mortal mica
#

the reason I suggested OnPossessed is because you could have the player connect, and not spawn the default pawn, maybe instead spawn an spectator, and have some UI to do things

#

so I usually setup the input bindings after posession, and that's a good opportunity to also set the correct input mode

quasi tide
#

All you need to do is start the process on the clients - they can calculate it locally.

surreal plaza
dusky yoke
#

When I use ServerTravel, does it respawn the player, or do I have to set the player's position again? 🤔

Edit: Actually, when my server & client transitions, they're dropping through the world. Hmm.

plush lotus
#

hey

fossil spoke
plush lotus
#

into the "Create Local Player" Do you know what they mean by : The ID of the physical controller that the should control the newly created player. A value of -1 specifies to use the next available ID

image.png
fossil spoke
#

@plush lotus This is for co-op on consoles.

plush lotus
#

when i keep it -1, i'm not able to move my second gamepad. When i put 1, im able to put my second gamepad

fossil spoke
#

If you know that an input of 1 works, just continue to use that?

plush lotus
#

no, it's to understand 😄

#

i can't accept to have some randomness in my project 😄

fossil spoke
#

There maybe nuances about using -1 that arent supported by all gamepads 🤷

#

Its not random though.

plush lotus
#

but if i don't understand why with -1 it doesn't work, when i believe it should work with -1.. it's not good 😄

#

even into the Tutorial video from Unreal Engine youtube page... they keep it to -1

#

so i would like to understand what is the "next available ID"

dusky yoke
fossil spoke
plush lotus
#

if it's the case, then my second controller should works with -1

#

the first one is really 0 ?

fossil spoke
plush lotus
#

lol

#

i have make a test... with print screen:
With 1 the 2 controller ID are : 0 and 1

With -1 the 2 controller ID are : 0 and -1

#

i have lost a full day because i keep the -1 😄

fossil spoke
#

It is probably a bug then.

#

Setting the ID directly is not a sin.

#

Especially if its because -1 is causing the wrong behaviour.

plush lotus
#

yes but i didn't expect the -1 was the issue... because by default it was that, and everyone was using that...

#

that's amazing 😄

visual glen
#

Whenever I introduce new components or new references to my project I've been getting these errors saying it can't find the native class

Anyone happen to know what can cause this? I am making sure to cook the build before opening it

image.png
thin stratus
#

Missing Native Class? Almost sounds like you have C++ code that you didn't compile and BPs that rely on it

visual glen
#

That's what it'd sound like but the code compiles, it did this when also simply adding a CameraComponent to the character class

thin stratus
#

Do you properly close the editor when recompiling?

#

Or rather before recompiling

#

Also are you working alone or could someone have pushed BPs without the matching C++ code?

visual glen
#

I've been using VS 2022 to open/close the editor

#

Starting to wonder if compiling is the same as building thonkSweat

thin stratus
#

It is

#

But the editor should be closed

#

Otherwise you hot reload

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Which can cause all kinds of issues

visual glen
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yep I compile it when it's closed

thin stratus
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Does this crash the editor or packaged builds only?

visual glen
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I've been using cooked builds for development client/server, only seems to crash the client

thin stratus
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So it doesn't crash if you do the same in the editor with server/client?

visual glen
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nope seems to work fine in editor

thin stratus
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Did you try connecting to the client process before it crashes?

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So you can debug it a bit more in vs?

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Also does it crash in a specific place in your game or when does it happen?

visual glen
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it crashes when trying to access the new playercontroller parent class I created

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on BeginPlay

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I can try attaching the client to VS to debug more, been using a console command to launch clients to get the log

thin stratus
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Create PlayerController on BeginPlay?

visual glen
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the playercontroller is doing SetInputMode(FInputModeGameOnly()); on BeginPlay

thin stratus
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Ah you don't create the PC manually right?

visual glen
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currently letting the GameModeBase take care of that

thin stratus
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I would try connecting it to vs and seeing if you can find out a bit more

thin stratus
visual glen
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will do, hopefully can figure this out once and for all sweeney_activate

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lol. it works perfectly fine when I run it in the debugger

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definitely looks like a step in the right direction

mortal mica
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does anyone know what the "new move" "pending/dual move" and "old important move" are in the context of the CMC replication?

thin stratus
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I think that stuff is outdated by now or not? They just send the container struct by now

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A Move is a SavedMove. So the Information to perform this frames move. The client performs the move, saves all required info to perform it again and also sends the data to the server so it can also move

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Not sure anymore what the dual and old important moves are about

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But probably just optimization

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@mortal mica

visual glen
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I just had a breakthrough learning experience

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I didn't realize that I had to compile the server AND client every time

mortal mica
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but it's not very clear

lost inlet
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It looks like there are still plans to port the CMC to NPP from a UDN post 3 weeks ago. NPP might not be completely dead afterall

mortal mica
lost inlet
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Network prediction plugin

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The idea is to have general purpose network prediction rather than the CMC and GAS inventing their own

mortal mica
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dang

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I'm writing my own movement component

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and kept repeating that code

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and thinking, man this sure sounds like something that could be rearchitecture to be reusable

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xD

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is it a bad idea to try and implement a more complex movement than the Character into a movement component? As in more complex I mean a non-capsule shaped vehicle (actual convex shape) with collisions/bumping/bouncing off impacts

woeful anvil
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Does Iris work in 5.1/5.2?

warped steppe
boreal apex
# mortal mica is it a bad idea to try and implement a more complex movement than the Character...

you could still use the stuff in the unreal vehicle movement component, i find it has many good features to start from, or at least prototype off of for a good start. you can turn off the default collision (or use it for something on the vehicle if you can) and then you can add additional custom collision with a specific tag or filter on the vehicle. You could also look into chaos destruction systems if your planning on doing any soft body vehicle physics, a buddy and i were going to do a vehicle game with chaos but havn't got around to it yet. Either chaos or some sort of mesh deformation system for the vehicle mesh would offer some amazing impacts in a vehicle game

flint hollow
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I want to start moving my project to be networked. I don't know anything about how to. I want to take the approach where i make the simplest method work and then learn from implementing and studying that.

So my question is, what's the most beginner friendly guide to get fast results?

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I'm thinking tutorial that takes me from empty project to working example, holding hand style.

hushed heart
hushed heart
prisma snow
flint hollow
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but i was just reminded about the docs for it, i think there was a straight forward example in there

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@hushed heart ty

hushed heart
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Reading it will go hand-in-hand with the quick start project I linked!

flint hollow
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alright

hushed heart
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It'll take you from the default third person template to networked rudimentary gunplay

flint hollow
hushed heart
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The "docs" I linked are the guide!

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The compendium is just good pre-reading to get a good primer before you jump in and do

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The quick start is a fairly simple process because a lot of the more complicated stuff is handled under the hood so it's good to have a general idea of what the code is doing

flint hollow
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right right

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well thanks, i trust this is the thing i wanted.

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a bit ready but also very doey

hushed heart
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You're welcome! It's good do-ey and easy to expand.

plush lotus
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Hi do you have some issue with the Enhance Input system for Local Multiplayer?

flint hollow
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@hushed heart i wasnt prepared to start learning C++ today

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i guess i have to be now

hushed heart
flint hollow
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in bp you mean?

hushed heart
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Yeah, exclusively in BP