#multiplayer | Unreal Source | Page 479

brittle karma Jul 21, 2019, 11:27 AM

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i want to implement an overlap event, which adds some power to the player pawn by overlapping the item, where should i implement this event? on item itself or Pawn class?(i have no idea that implementing the overlap in which class may be more efficient in next sections of implementing.)

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for example i want to pick up bullets , bullet class should be overlapped or pawn class should overlap that bullet?

high current Jul 21, 2019, 11:36 AM

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I would do it on the actor which is being overlapped by the pawn

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well, in order for the overlap to work, both actors should generate overlap events first

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imo its a matter of game design, and code structure, more than optimization

brittle karma Jul 21, 2019, 11:38 AM

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how can i tell that which pawn overlapped that actor ?

high current Jul 21, 2019, 11:39 AM

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if you have an extremely systemic game, where alot of things interact with that bullet

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the other actor pin

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from the begin overlap event should give you the actor overlapping

brittle karma Jul 21, 2019, 11:40 AM

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yeah i know that i mean how to tell everybody that this pawn overlapped that actor

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can u give a basic perception about it?

high current Jul 21, 2019, 11:42 AM

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define tell everybody

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like show up on their hud, telling them that this specific pawn overlapped?

brittle karma Jul 21, 2019, 11:44 AM

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so if i implement this overlap event in the Bullet class how can i increase the bullet amount of overlapping pawn?

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i meant like the bullet increasing should apply to an specific pawn(overlapping pawn) and not everybody.

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im new to multiplayer stuff so maybe the questions aint so right ((:

high current Jul 21, 2019, 11:48 AM

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well, if you cast to the overlapping actor, then you will only be interacting with that specific pawn wihch overlapped the bullet

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other clients will run this logic(because each client has every other pawn, running as an actor)

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but tha game knows which actor is currently being controlled and which isnt, so for a client overlapping the bullet, the bullet code on the overlap event will influence the client's pawn, but for everyone else, it wont influence their pawn, but the pawn which is interacting with the bullet (for them)

brittle karma Jul 21, 2019, 11:51 AM

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aha so basically i should not worry about that everybody runs the same code and it will increase for other clients too

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one more question, should server do the logic for increasing bullet amount?

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like server runs the code for increasing bullet for an specific client(overlapping actor) and tell that specific client that yr bullet amount has increased

high current Jul 21, 2019, 11:53 AM

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so just to reitterate your pverious question, if you cast to the other actor on the overlap event, everything will be fine because that is referencing one specific actor for everyone

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but for example if you do get player pawn index {0}

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on the overlap event

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then everyone will execute the same thing for themselves

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as for clients {get player pawn} is always the local one

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and yes, server should do the logic

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so in your pawn you have a custom event, which is set to be replicated on the server, and from your bullet you cast to the pawn and then execute the event, that would ensure that the server version of the pawn overlapping

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executes whatever you want to happen

brittle karma Jul 21, 2019, 11:57 AM

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fantastic help. thank you so much.

next warren Jul 21, 2019, 12:59 PM

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Hi,i have done the vehicle wheel spawning particle based on the surface type in networked, is this correct....

📎 Screenshot_343.png

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📎 Screenshot_344.png

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📎 Screenshot_340.png

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📎 Screenshot_341.png

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any suggestion or tips friends....

high current Jul 21, 2019, 1:04 PM

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you arent running the timer on the server

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but you are trying to invalidate it

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will probably give you an error as that variable will be null on server

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are you having an issue, or are you simply asking if this is a valid way to do what you want to do

next warren Jul 21, 2019, 1:08 PM

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this is protocol and I m asking is this correct procedure and any modifiable need

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And i m spawning wheel particle only on clients side is that necessary to run it on server

high current Jul 21, 2019, 1:10 PM

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if it is only cosmetics, and having them being out of sync isnt an issue

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then its kinda fine

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you can save a lot of RPCs if you switch to a RepNotify approach tho

grizzled stirrup Jul 21, 2019, 1:12 PM

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Theoretically if you were simultaneously building for PC and console (provided you have the source etc), how would you handle the game using the correct subsystem for inviting friends?

high current Jul 21, 2019, 1:12 PM

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cross platform?

grizzled stirrup Jul 21, 2019, 1:12 PM

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Would you package each version with a different main menu map which would show the correct UI / use the correct subsystem for whatever platform you are on?

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No just each one separately

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For example if you use Steam, you can get by with having showing Steam specific UI in the main menu and then once in the session itself, you don't need any Steam specific functionality

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I'm assuming it's the same for console

high current Jul 21, 2019, 1:14 PM

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No experiance there, but I am guessing you have to distinguish this on a version control level, and have a branch off from your main build

grizzled stirrup Jul 21, 2019, 1:14 PM

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That does make sense

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I wonder if simply setting the game startup map and building one by one would also work (PS4 Startup Map, PC Startup Map etc)

high current Jul 21, 2019, 1:16 PM

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another way is to have your differences be loaded at game client start

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with a branch on your game instance

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reading if your are PC or PS4

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for example

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and then doing the corresponding setup from there

next warren Jul 21, 2019, 1:17 PM

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@high current So is this correct procedure or not

high current Jul 21, 2019, 1:17 PM

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idk if UE had that by default but I am sure there is a plugin somewhere that gives you an enumeration with the current platform

grizzled stirrup Jul 21, 2019, 1:17 PM

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Yeah actually that makes the most sense

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Thanks!!

high current Jul 21, 2019, 1:17 PM

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but I am not a fan of that option

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because it would increase package sizes

grizzled stirrup Jul 21, 2019, 1:17 PM

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I'm so curious about how much extra work in general there would be with ports

high current Jul 21, 2019, 1:17 PM

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if your stuff would be vastly different

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for 2 platforms

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then each platform will hold useless data

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for the other platform

grizzled stirrup Jul 21, 2019, 1:18 PM

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It'd be the exact same game but with the correct invite system

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So PS4 friends / lobbies vs Steam friends / lobbies

high current Jul 21, 2019, 1:18 PM

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doesnt sound too bad then

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@next warren All I am saying is that it could be better, but hey, if it works it works 😃

next warren Jul 21, 2019, 1:29 PM

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@high current It working now i checked..... properly on clients side

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😀

high current Jul 21, 2019, 1:31 PM

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Well, then it is up to you if you want to optimize that

next warren Jul 21, 2019, 1:58 PM

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How can i optimise that...

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@high current

high current Jul 21, 2019, 1:58 PM

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Converting everything to a simple RepNotify function

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can be a boolean you toggle

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a rep notify is replicated each time you change the variable

next warren Jul 21, 2019, 1:59 PM

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Spawnparticle variable to repnotify

high current Jul 21, 2019, 2:00 PM

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so instead of running that on your MoveForward Axis, I would put them in our move foward button

next warren Jul 21, 2019, 2:00 PM

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Onserver side i have to change that repnotifyvariable

high current Jul 21, 2019, 2:00 PM

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yeah, and it doesnt have to be the spawnparticle

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as all clients know what the particle is and it doesnt change

next warren Jul 21, 2019, 2:01 PM

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Spawnparticle is boolean in my bp

high current Jul 21, 2019, 2:01 PM

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ah

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sorry yeah

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that would do

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do you know what rep notifies do

next warren Jul 21, 2019, 2:02 PM

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Yeah i know bro...

high current Jul 21, 2019, 2:04 PM

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ok, then yeah, I would have the MoveForward button set the variable to true if pressed, and false if released

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in the OnRep function you run a branch, linked to the Spawnparticle condition

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and from there on you do start and stop custom events

next warren Jul 21, 2019, 2:05 PM

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I can do that but its car acceleration so axis only best

high current Jul 21, 2019, 2:06 PM

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then put 2 DoOnce nodes

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resetting each other

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in your axis thing

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the goal is that the variable is changed only once, isntead of constantly being set if you keep going foward, or keep your vehicle below 5 speed

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now getting back to the on rep function, you can remove the multicasts from the start and stop custom events

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and you should be good to go

next warren Jul 21, 2019, 2:08 PM

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K i will.look into that now, then i send a screenshot

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📎 Screenshot_346.png

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📎 Screenshot_348.png

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📎 Screenshot_347.png

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the modified bp

high current Jul 21, 2019, 2:19 PM

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and does it work

next warren Jul 21, 2019, 2:20 PM

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Working😀

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thanks bro..

high current Jul 21, 2019, 2:21 PM

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noice

next warren Jul 21, 2019, 2:23 PM

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u told constantly setting var put doonce i

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i m not constanctly setting the spawn variable, only when its changed i m setting it on server using branch

high current Jul 21, 2019, 2:24 PM

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I advised against constantly setting the var

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only once per state

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so if you are doing that then you are fine

next warren Jul 21, 2019, 2:25 PM

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i dont understand

high current Jul 21, 2019, 2:26 PM

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when you start driving your vehicle, and it gets above 5 speed

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the branch is true

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and your code starts setting the spawnparticle variable

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when the branch is true

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spawn particle should be set to true once

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and the same thing with false

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oh wait

next warren Jul 21, 2019, 2:27 PM

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i m setting spawnparticle variable only once bro..

high current Jul 21, 2019, 2:27 PM

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you are already doint that

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yeah the screenshot is far up so I remembered something else

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then ur fine

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sorry

next warren Jul 21, 2019, 2:29 PM

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after checking vehicle speed if greater than 5 checking spawn particle var if true then dont do if false then run on server

brittle karma Jul 21, 2019, 2:44 PM

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guys i implemented an Overlap function in Actor class (it is an item to being picked by players) here it is.

void ALaserBullet_PIckup::OnOverlapBegin(UPrimitiveComponent * OverlappedComp, AActor * OtherActor, UPrimitiveComponent * OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult)
{
auto OverlappingPawn = Cast<ARollingSurvivorBall>(OtherActor);
PlayEffect();
// client wants to pick up the Lasers? Should send request to the server.
if (Role == ROLE_Authority) {
OverlappingPawn->UpdateLaserAmount(3);
Destroy();
}
}

and here is the UpdateLaserAmount() function implementation.

void ARollingSurvivorBall::UpdateLaserAmount(int DeltaLaser)
{
Server_UpdateLaserAmount(DeltaLaser);
}
and here is the simple logic for the Server...._implementation(...)

void ARollingSurvivorBall::Server_UpdateLaserAmount_Implementation(int DeltaLaser)
{
if (Role == ROLE_Authority)
{
//increase or decrease the laser shots
CurrentLaserAmount += DeltaLaser;
}
}

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here is funny part

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when server overlaps the item client gets bullets and when client overlaps the bullets, server gets the bullets.

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and its only for Server and Client1; Client 2(or whatever more than 1) behaves in a proper way

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why is that so?
my logic is that whenever anyone overlaps an item, the item class should call a function of overlapping actor and the overlapping actor sends request to the Server that i overlapped an actor so increase my bullet amount.

high current Jul 21, 2019, 2:55 PM

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well, the bullets variable is that replicated

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DeltaLaser and current laser amount

brittle karma Jul 21, 2019, 2:56 PM

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CurrentLaserAmount is replicated yes

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logically i dont need current laser amount to be replicated, its ok to stay local

high current Jul 21, 2019, 2:59 PM

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yea

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you do need delta laser tho

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if you are setting it with authority

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you want that carried over to the client

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I get bamboozled when I see C++ still

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so I am afraid I wont be of much help here

brittle karma Jul 21, 2019, 3:02 PM

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i am new to this MP stuff so sometimes i get confused by meanings like Replicated and RPCs and their differences

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anyway, thanks

twin juniper Jul 21, 2019, 3:42 PM

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Folks, I require assistance with replicating firing effects for my template.

https://i.gyazo.com/42a73ad46c155e3582903491638e934e.png
https://i.gyazo.com/61a27109ebd423c3808ab3d7bc37f293.png
https://i.gyazo.com/94fed968d0a7f7a2ed81075ac976cd90.mp4

▶ Play video

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I am struggling to get the projectile to aim at the player's direction on the dedicated server.

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Here is the gameplay on a standalone server.
https://i.gyazo.com/745ce77d9021eb67d341ef49d0ffcda3.mp4

▶ Play video

meager spade Jul 21, 2019, 3:45 PM

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first things first

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Standalone server, you mean Listen Server?

twin juniper Jul 21, 2019, 3:46 PM

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No

meager spade Jul 21, 2019, 3:46 PM

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or SinglePlayer

twin juniper Jul 21, 2019, 3:46 PM

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Singleplayer

meager spade Jul 21, 2019, 3:46 PM

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right

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so first checks you need to do, and it is probably the issue

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what is the rotation of the actor on server compared to client

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put a print in tick

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getting the actor rotation to print to screen

distant talon Jul 21, 2019, 3:52 PM

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Having an issue where ue4's replication system is only sending the frequency of updates i'd like when the two actors are right next to eachother. anyone know where the controls are for proximity based repliccation/updaterate are? I already have those actors as always relevant, highest priority, huge net cull squared distance, so im not sure if there's even anything else i could do there. I already have the super broken adaptive networking stuff disabled. Min and max net update frequency are the same.

twin juniper Jul 21, 2019, 3:54 PM

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https://i.gyazo.com/98778118af73963f31081ce7811eff73.mp4

▶ Play video

meager spade Jul 21, 2019, 3:56 PM

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can you just do it with dedicated server and 1 client

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that wall of text is hard to read

twin juniper Jul 21, 2019, 4:08 PM

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Hey mate, you told me to use a tick and print out actor rotation. What did you expect?

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What about this one?
https://i.gyazo.com/12c254885c8be11e5a8e58266c8f04c2.mp4

▶ Play video

meager spade Jul 21, 2019, 4:13 PM

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ensuring the rotations are in sync

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and i can't se your Spawn projectile blueprint at all

twin juniper Jul 21, 2019, 4:40 PM

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https://i.gyazo.com/dd9bd23fca31cc583d06d0ab04b72fc5.png
https://i.gyazo.com/f1c3ff02a69a04a0cfb5152e0c074a54.png
https://i.gyazo.com/459256f21b1b06e1c3482c13a2ee7ee0.png
https://i.gyazo.com/7ef6d1941c68ed098ec8520268ff3e06.png
https://i.gyazo.com/5fb1682c392e2ab0de3bd62301f81bca.png
https://i.gyazo.com/79c1662387202b114e90b40020609fb8.png
https://i.gyazo.com/51bb98909ca73de5a71bd223fc9fdc68.png
https://i.gyazo.com/9cc1e52f4242b2e3223a44fb8d115fb0.png

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Its a complex system.

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Mind the spam of imagery.

meager spade Jul 21, 2019, 5:19 PM

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still don't see where it actually spawns the projectile tho

distant talon Jul 21, 2019, 5:43 PM

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So today i learned about

 // magic number distances used by AI/networking
#define CLOSEPROXIMITY                    500.f
#define NEARSIGHTTHRESHOLD                2000.f
#define MEDSIGHTTHRESHOLD                3162.f
#define FARSIGHTTHRESHOLD                8000.f

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it was not a good day

twin juniper Jul 21, 2019, 5:50 PM

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@meager spade Missed two more images.
https://i.gyazo.com/51bb98909ca73de5a71bd223fc9fdc68.png
https://i.gyazo.com/9cc1e52f4242b2e3223a44fb8d115fb0.png

meager spade Jul 21, 2019, 6:07 PM

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and what does GetProjectile transform do?

grizzled bay Jul 21, 2019, 6:19 PM

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If i have an object in my level which displays a text widget when a player is nearby, how would i go about only showing it to the players who are nearby, and not just everyone?

limber mortar Jul 21, 2019, 6:20 PM

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When your character overlaps said object, create the widget to the character owner

grizzled bay Jul 21, 2019, 6:21 PM

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is there anyway to use the widget attached to the object, or would creating to the player be the only way

limber mortar Jul 21, 2019, 6:24 PM

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Widgets run client side only so I think you would want to keep it with the player, use get controller, not get player controller

📎 unknown.png

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Actor begin overlap can be your start trigger

grizzled bay Jul 21, 2019, 6:24 PM

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thanks

limber mortar Jul 21, 2019, 6:25 PM

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np

cerulean escarp Jul 21, 2019, 7:33 PM

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my helicopter keeps jittering almost like rubberbanding but not quite to that extent. is there any way to fix this?

winged badger Jul 21, 2019, 7:40 PM

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First check if you havescene components rrplicated that do not need to be replicatef

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(No component that is a part of a CDO and diesnt contain custom network logic should be replicated)

high current Jul 21, 2019, 7:59 PM

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crap, internet is messing with me, sorry for the weird messages

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@cerulean escarp it is probably rubber banding, but record a video if you can

cerulean escarp Jul 21, 2019, 8:00 PM

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k I'll record a vid real quick

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https://drive.google.com/file/d/1clKPY_V5uCLkQu2SFU_1ZZDl29SBJlAd/view?usp=sharing

Google Drive

Desktop 2019.07.21 - 15.01.10.01.mp4

high current Jul 21, 2019, 8:13 PM

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oh wow, 330 mb, yeah, it takes me 30 minutes to upload a crappy twitter post, I cant watch that sorry, hope someone else helps you 😃

twin juniper Jul 21, 2019, 9:25 PM

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@meager spade The GetProjectile transform:
https://i.gyazo.com/f78964bdf4e704c5859afa5a458d812d.png

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https://i.gyazo.com/9083015a2c413d47b8cfaaa3fe57e94f.png

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Whichever the player is aiming, the bullet spawns from the world location of the sprite.

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and using the controller's rotation.

normal ermine Jul 21, 2019, 10:22 PM

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is there a way to have an actor spawn and its owner always be the server regardless of who triggered the spawn?

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i guess i could just set the owner as the game state

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nvm

twin juniper Jul 21, 2019, 10:26 PM

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I will see what I can do there.

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Why not player state if that is the case?

normal ermine Jul 21, 2019, 10:28 PM

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does it make a difference?

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it's gonna spawn for everyone so i'd keep it in game state just for organization's sake

twin juniper Jul 21, 2019, 10:33 PM

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A projectile?

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Alright

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I guess...

normal ermine Jul 21, 2019, 10:35 PM

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i still dont understand these classes very well so i dont know if there would be any practical differences for what i want to do though

twin juniper Jul 21, 2019, 10:35 PM

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Did not work.

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I think a problem I see is that the bullet aiming it focusing at the center of the level.

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I also found out that smart aim is not working either. So I can not shoot the ground when i hold right-click on the server.

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They say macros dont replicate on server but it clearly seems to do so.

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I just need to fix some aiming issues.

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Also when I replicate the inventory manager array, it seems to replicate ammo just fine as well.

grand kestrel Jul 21, 2019, 11:31 PM

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@normal ermine you're probably misunderstand ownership. Actors own actors, not server or client, they can be present on both, only server, only client but that's not ownership

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If you want to call rpc the ownership chain needs to lead back to a player controller but anything can replicate

fleet raven Jul 22, 2019, 2:10 AM

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what does it mean for this to print to the log 160000 times? why would the character movement keep failing to call this without me noticing any issue in game

📎 unknown.png

frank tinsel Jul 22, 2019, 5:08 AM

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I keep reading different things online. If I want to have player stats that can be leveled up, where should these stats be stored and how should they be stored? For example a charactersheet class vs playerstate. but I also want my NPC's to have their own stats so how would that affect it?

late wharf Jul 22, 2019, 5:55 AM

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@frank tinsel take a look to the gameplay abilities system. No so known part of unreal. It might be what you need

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@winged badger Forgot to tell you that took us a day, but we found out what was the problem. Turns out that there's a bug in the blueprints copy logic in ue4. It can happen in 2 ways: either because you copy/paste an actor that is on the level to duplicate it or because you copy/paste a BP in the content browser to create another BP that inherits from the same parent as the "original". In our case, it was the second. What the bug does is that it creates 2 blueprints with the same outer object, and that's not possible, so the 1st instance of your BP gets the outer nullified when the second instance spawns and so on. That crashes when replicating in our case because is the only moment the code checks for it. Took us a while until we discovered which enemy was exactly, we had to run different tests cooking levels etc.

frank tinsel Jul 22, 2019, 6:32 AM

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@late wharf I've heard its not very friendly with customization and since its leftover from paragon, that means it is not kept up with. I would also prefer to steer away from plugins if possible

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But I can play around with it on my othwr machine and see what its all about

late wharf Jul 22, 2019, 6:38 AM

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it's incredibly customizable and Fornite bases its entire gameplay functionality in it. Not the only game though. Read the pinned docs/videos in the gameplay abilities channel. There's also one very good video talk about it from the Prague Unreal fest

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the only thing is that you need c++ and that it's not straightforward. ARPG demo (Epic) is a good place for a 1st approach. Take a look, might be good for you or too much.

chrome bay Jul 22, 2019, 9:03 AM

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GAS is used a lot by Epic and other companies. Splash Damage gave a good talk on how they use it, I think they intend to use it for everything they do going forward.

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It's a lot of grunt work to get it setup, but once it's in the right place you can add new stuff quickly - I think that's the idea. It's not suitable for every game, but it's definitely useful and widely applicable.

frank tinsel Jul 22, 2019, 9:56 AM

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Well I'll play around with it. My real setback was how to approach handling my skills for the players in a multiplayer game. After I got the HOW to part, I could figure out the mechanics of it easier.

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Maybe it's workable

pallid mesa Jul 22, 2019, 9:57 AM

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@fleet raven be careful with proxy geometry clipping with the upper body of your character, sometimes with weird/thin geo the cmc predicts forward but gets corrected back and won't process a move

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Q: I'm having an issue with attachments and possessions on UE4. (@ me please 😄 )

This only happens with several connections on a dedicated server session (+10)

When my character interacts with a vehicle I do attach the character to the vehicle in the server (snap to target) and then I possess it (on the server aswell). Then after a nice travelling session, I detach the character from the vehicle (aswell on the server) and I possess the character (server aswell).

Everything is good when I have a few connections on my server, but when the number of connections increases, esporadically when I posses the character back after travelling with the vehicle, the character appears in the position where I attached it initially (where I possessed the vehicle) and the cmc won't react at all... after some seconds the character teleports to the real location and the player regains control (this only happens on the owning client as long as I can observe). Is there something odd with my workflow?

pallid mesa Jul 22, 2019, 10:24 AM

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(+ Also, I'm unable to replicate this in engine with just the network commands to induce latency or Paket loss/dup - single process off)

thin stratus Jul 22, 2019, 10:33 AM

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@pallid mesa I assume this is because the CMC doesn't replicate any location during the car drive?

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With more connections you have more bandwith being used and it's basically just a lag?

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Server is of course instantly

pallid mesa Jul 22, 2019, 10:34 AM

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Yes the cmc has it's movement disabled. Movement Mode = none. Now... we are speaking about seconds, sometimes it takes 20 seconds for you to regain cmc control

thin stratus Jul 22, 2019, 10:34 AM

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I heard of a similar issue where a cave was unloaded on the Client and the Server Character fell through the floor and when coming back the to the Cave the Server was gone until the actual server player moved again

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Can't you call "Teleport" on the Character directly after possessing and enabling cmc?

pallid mesa Jul 22, 2019, 10:36 AM

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I tried setting the location manually on the owning client and that worked but still, no CMC control. Maybe calling teleport manually could do the trick, but what I do need is the cmc to "wake up", because just setting the location won't do it

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about teleport... shall it be called from the server aswell?

thin stratus Jul 22, 2019, 10:42 AM

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Yeah

pallid mesa Jul 22, 2019, 10:43 AM

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👌 gonna try that and see what happens

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atm I was using setactorlocation

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I don't know the actual difference but it seems it does things with the primitive component

high current Jul 22, 2019, 11:37 AM

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And chance that an immediate repossesion of the pawn might wake up the cmc?

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In case the teleport doesnt pan out

pallid mesa Jul 22, 2019, 11:46 AM

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If I interact again with the ship in this invalid state the character jumps into the vehicle again

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since it's all server sided

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the problem is scoped to the owning client and the cmc

high current Jul 22, 2019, 11:46 AM

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I see

pallid mesa Jul 22, 2019, 11:47 AM

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the correction comes too late

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and I have no way to force call a cmc correction from BP's

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maybe teleport works

high current Jul 22, 2019, 11:50 AM

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There was an option in the cmc

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To detach the client

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It was a bool iirc

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Which might reattach the cnc back to the servers after it is toggled

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It was near the prediction settings

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Not on pc atm tho

pallid mesa Jul 22, 2019, 11:52 AM

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I have some buttons to touch yeah, the problem is that I can't replicate this in engine

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so I have to deploy and do a proper playtest with qa testers

high current Jul 22, 2019, 11:52 AM

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Yeah, thats the most annoying type of debugging

pallid mesa Jul 22, 2019, 11:52 AM

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thanks god we got symbols

#

and minidumps

jade patrol Jul 22, 2019, 12:44 PM

#

Hey guys, I'm having issues with RepNotify and I'm not sure what is causing it. I'm spawning spheres and trying to color them base on a variable that is set in the spawn actor node. I notice that the variable replicates after construction so I'm using rep notify. Just that the server paints with right color, but the material is not applied ? Not sure how to debug this.

📎 unknown.png

winged badger Jul 22, 2019, 1:52 PM

#

is Sphere a StaticMeshComponent on that Actors CDO?

#

@jade patrol

jade patrol Jul 22, 2019, 2:35 PM

#

yes

#

is a static mesh using the projectile movement component

covert gorge Jul 22, 2019, 3:04 PM

#

I have a problem and i am not sure how to solve it, i think that, due to bandwith problems, there are some replicated variables that sometimes desync, not because i change them on client, but because variable values are not well replicated. Is it possible to overcome/debug this type of bug?

winged badger Jul 22, 2019, 3:04 PM

#

@jade patrol its a StaticMeshComponent on that Actor, or a StaticMeshActor?

#

there is no such bug @covert gorge

#

in any case andrei - that Sphere reference has to be Valid on the client for it to work

void acorn Jul 22, 2019, 3:09 PM

#

hi, do you use to store in GM a property of type MyGameStatesCasted or you cast each time you need ?

winged badger Jul 22, 2019, 3:09 PM

#

i usually have a function that returns me GS of the correct type

#

i cache only when there are 2-3+ layers of indirection

void acorn Jul 22, 2019, 3:10 PM

#

ok

covert gorge Jul 22, 2019, 3:10 PM

#

@winged badger really? i am trying to find a post of someone that had the same problem, but he manage to solve it reducing bandwith consumption with network profiler

winged badger Jul 22, 2019, 3:10 PM

#

delayed packages, sure

void acorn Jul 22, 2019, 3:10 PM

#

but if you cache it ? in what function override would you do it ?

winged badger Jul 22, 2019, 3:10 PM

#

but not outright replicated variable fails

covert gorge Jul 22, 2019, 3:11 PM

#

https://answers.unrealengine.com/questions/166395/bug-replicated-variables-are-not-reliable.html

#

this one!

winged badger Jul 22, 2019, 3:11 PM

#

AMyGameState* GetMyGameState() const
{
    return Cast<AMyGameState>(UGameplayStatics::GetGameState());
}

#

not passing NetRelevancy check, or being Dormant might do it

#

likely the first

#

never had a single replication failuire that i noticed

#

if i cache it

covert gorge Jul 22, 2019, 3:14 PM

#

i think that i configured it to be always relevant, but i am not completely sure

winged badger Jul 22, 2019, 3:15 PM

#

//.h
UPROPERTY(BlueprintReadOnly) AMyGameState* MyGameState;

AMyGameState* GetMyGameState()
{
    if (MyGameState) { return MyGameState; }
    MyGameState = Cast<AMyGameState>(UGameplayStatics::GetGameState());

    return MyGameState;
}

void acorn Jul 22, 2019, 3:16 PM

#

@winged badger thanks, by the way I'm just looking a decent place to set cache property in the GM (wich handler/event should I override) ?

#

what's the good event I mean

winged badger Jul 22, 2019, 3:16 PM

#

none, you just write your own getter functions like that

void acorn Jul 22, 2019, 3:17 PM

#

hmmm ok so I maybe not use cache

#

thanks

fierce grove Jul 22, 2019, 3:19 PM

#

So I'm building a small tps project and I struggle to switch weapon. I made structs where I log my data for each weapon. I've bound ways to switch weapons / pickup / fire.

#

On the local client everythings fine but when going multiplayer Fire Rate is "replicated" / weapon name / puickup events

#

but my laser amount seams off

#

https://blueprintue.com/blueprint/nho2ns4j/

BlueprintUE

bug acces variable

#

just the end of the whole process if you need more info don't hesitate to ask

#

my laser beam spawn only spawns the first weapon laser amount weird

jade patrol Jul 22, 2019, 3:31 PM

#

@winged badger actor with static mesh component 😃 . The weird thing is the actor is spawned on server and on client it works fine and it has the material. Now I notice inconsistency and on server after the spawn the RepNotify does not trigger at all.

solar stirrup Jul 22, 2019, 3:46 PM

#

RPCs don't support OUT parameters right?

winged badger Jul 22, 2019, 3:47 PM

#

nor can they have return value

#

other then void

solar stirrup Jul 22, 2019, 3:47 PM

#

hmm

void acorn Jul 22, 2019, 3:51 PM

#

hmm, do players ids change when someone disconnects ?

chrome bay Jul 22, 2019, 3:52 PM

#

@solar stirrup RPC's are asynchronous calls so no

#

Scratch that, they're asynchronous calls that might not even get called

#

If you need a callback use another RPC or a replicated value

solar stirrup Jul 22, 2019, 3:53 PM

#

Well the server deals with the handling already, the clients just RPC to say what they want it to do

#

for the inventory component

chrome bay Jul 22, 2019, 3:53 PM

#

Yeah but it doesn't happen instantly

solar stirrup Jul 22, 2019, 3:53 PM

#

yeah

#

talking about latency, means I should predict client side right?

chrome bay Jul 22, 2019, 3:54 PM

#

It takes time to do that, so you can't stall the whole thread while you wait for the result

#

you don't need to predict adding stuff to inventory

#

People can learn to live with stuff like that

solar stirrup Jul 22, 2019, 3:55 PM

#

aight

chrome bay Jul 22, 2019, 3:55 PM

#

It's overkill, not to mention prone to a lot of error

#

The only stuff you want to predict is something that needs immediate feedback, e.g movement, or in some cases firing weapons

solar stirrup Jul 22, 2019, 3:56 PM

#

so technically the only public thing in the inventory should be the RPCs since only the server does the internal handling?

chrome bay Jul 22, 2019, 3:56 PM

#

etc.

#

All my inventory stuff is done server-side

#

Adding slots, adding items to slots etc.

#

Clients just get the latest state via replication

#

And fire some events if they need to

solar stirrup Jul 22, 2019, 3:56 PM

#

is there a risk if they move items around too fast?

chrome bay Jul 22, 2019, 3:57 PM

#

I doubt it

solar stirrup Jul 22, 2019, 3:57 PM

#

actually

chrome bay Jul 22, 2019, 3:57 PM

#

if there is, they just move it again

solar stirrup Jul 22, 2019, 3:57 PM

#

yeah nah because they just get what the server says anyway

chrome bay Jul 22, 2019, 3:57 PM

#

exactly

solar stirrup Jul 22, 2019, 3:57 PM

#

aight ty

#

oh and

#

how would you go for example taking an item from inventory A (player's) and move it to inventory B (a chest)?

chrome bay Jul 22, 2019, 3:58 PM

#

have some kind of inventory interface on the player and the chest

#

Tell the server (move item from inventory a to inventory b), via the player controller or something

#

You can reference an actor you don't own, you just can't call RPC's on it directly

solar stirrup Jul 22, 2019, 3:59 PM

#

I shouldn't own the inventory component myself right? The server owns it

#

just making sure

chrome bay Jul 22, 2019, 4:00 PM

#

Well I imagine if it's part of a pawn, the client owns the pawn. Nothing wrong with that

#

If it's on a chest, then yeah the server should own it I expect

solar stirrup Jul 22, 2019, 4:00 PM

#

~~Property replication is from server to client, regardless of owner right?~~ yup

chrome bay Jul 22, 2019, 4:04 PM

#

yeah always

solar stirrup Jul 22, 2019, 4:04 PM

#

Aight I'm getting my head wrapped around replication nice

#

so my component's gonna need a few tweaks but it's perfect for now

limber mortar Jul 22, 2019, 4:06 PM

#

Can I be sure this is a physics issue if I set high amounts of lag in my defaultengine.ini and can't recreate the problem?
If I take my spreading fire BP out of the map, vehicles work fine all map long on my dedicated server. I feel either:

A.) My fire is causing some replication, or congestion, that effects the vehicle
B.) My fire's processing is actually effecting the physic calculations of the vehicle.

https://www.youtube.com/watch?v=ElbqVc93g0I

YouTube

Benjamin Beard

VehicleIssue

Issue during testing

▶ Play video

#

I just thought if it was a physics desync I could recreate it with lag 😦

chrome bay Jul 22, 2019, 4:08 PM

#

welcome to multiplayer vehicle physics

#

In a nutshell, here's the issue:

You move the physics locally on the client, and tell the Server
The server gets the packet later, and moves the vehicle. It replicates the location back to the client.
Client gets the (old) replicated location and so snaps back.

#

The default vehicle movement component does not support multiplayer in the slightest, it needs a lot of work to be useable in a real environment.

#

Go into the vehicles skeletal mesh settings and uncheck 'Replicate Physics To Autonomous Proxy'

#

That will make it client-authoritative

limber mortar Jul 22, 2019, 4:16 PM

#

Ah thanks partner.

#

I have been indoctrinating myself for a few days now trying to get this last part fixed. I'll try it out!

#

First I've seen 'Replicate Physics To Autonomous Proxy'

chrome bay Jul 22, 2019, 4:20 PM

#

yep, uncheck it

#

Assuming the vehicle is a pawn

#

and you're possessing it

limber mortar Jul 22, 2019, 4:21 PM

#

I am, just lookin for the box

#

😄

chrome bay Jul 22, 2019, 4:21 PM

#

it's in the mesh settings

#

(in the blueprint)

limber mortar Jul 22, 2019, 4:23 PM

#

lookin 😃

📎 unknown.png

#

I'll keep lookin, just didn't see it lookin at all the fields

#

unless its something 4.20 or above

#

I'm on 4.19

chrome bay Jul 22, 2019, 4:25 PM

#

must be

#

I'm on 4.21 atm in this project

#

4.19 is ancient now really

limber mortar Jul 22, 2019, 4:26 PM

#

Its my first game, I'm afraid to upgrade being so close to ready for testing

worthy perch Jul 22, 2019, 4:26 PM

#

4.21 is pretty good too.

chrome bay Jul 22, 2019, 4:26 PM

#

Just make a backup first

limber mortar Jul 22, 2019, 4:26 PM

#

but I need vehicles working

chrome bay Jul 22, 2019, 4:26 PM

#

Should be fine though, 4.21 and 4.22 are ok

limber mortar Jul 22, 2019, 4:26 PM

#

yeah, about to

chrome bay Jul 22, 2019, 4:26 PM

#

4.23... not so much right now

#

but it's in preview in fairness

limber mortar Jul 22, 2019, 4:26 PM

#

oh

#

also

#

I'm in 4.19 source build

#

so I imagine I need to install 4.21 then convert to source so I can make my dedicated server?

chrome bay Jul 22, 2019, 4:27 PM

#

You need a source build?

worthy perch Jul 22, 2019, 4:27 PM

#

From this Discord, from what I've read, it seems that 4.22 has problems.

limber mortar Jul 22, 2019, 4:27 PM

#

I'm running a dedicated server my testers have been using

shut gyro Jul 22, 2019, 4:27 PM

#

Doesn’t 4.20 fix Desync issues with client/server position? I think it’s worth to upgrade just for that

chrome bay Jul 22, 2019, 4:27 PM

#

Kk, if you've made no changes to engine source and you're just using it to build a dedicated server, you can use the launcher version for development then switch to source version for packaging if you want to save time

#

Otherwise yeah, have to redownload and compile source

limber mortar Jul 22, 2019, 4:28 PM

#

oh ok

chrome bay Jul 22, 2019, 4:28 PM

#

btw

#

look into source control

limber mortar Jul 22, 2019, 4:28 PM

#

I'm going to copy and attempt the update today

chrome bay Jul 22, 2019, 4:28 PM

#

It's exactly what this sort of thing is for

limber mortar Jul 22, 2019, 4:29 PM

#

I have started, just have not set it up yet

#

been doing my own version

chrome bay Jul 22, 2019, 4:29 PM

#

Once you do you'll regret having ever worked without it

limber mortar Jul 22, 2019, 4:29 PM

#

but a waste I know

chrome bay Jul 22, 2019, 4:29 PM

#

Just use Perforce, it's free for five users. Just need somewhere to host it

#

Hell hosting on the same machine is better than nothing

limber mortar Jul 22, 2019, 4:29 PM

#

thanks, I'll make that my project for the day, setting up source control and engine update

#

I was going to do source control soon with my project mostly working. I do have copies of BP before I edit them and have been able to restore no prob so far

#

afk for a sec, more coffee

limber mortar Jul 22, 2019, 4:51 PM

#

running some tests on the movement while I get ready for my upgrade

ocean geyser Jul 22, 2019, 4:56 PM

#

question, lets say i have a map thats just a house, the house may have 25-30 doors. would it be better to setup the doors via replicate using to open/close the doors on the client from the server, or to simply SetReplicates and SetReplicateMovement to true. im not sure which one would be more efficient over the network

placid narwhal Jul 22, 2019, 5:02 PM

#

@ocean geyser replicate the event not the movement.

ocean geyser Jul 22, 2019, 5:04 PM

#

ty

timid moss Jul 22, 2019, 5:48 PM

#

hey guys why does BeginPlay() in the PlayerController not run on the client? I did multiple checks to make sure that it only runs on the server and it does. Am I missing a core concept to UE4 multiplayer?

grizzled bay Jul 22, 2019, 6:16 PM

#

my understanding of it is there is one player controller per person, usually what you do in it will only affect the client it is owned by, then if you want to change stuff for other clients you need to call a server event on like player state or something. could be wrong though.

ocean geyser Jul 22, 2019, 6:16 PM

#

maybe the playercontroller isnt setup on the client? as far as i know with the third person project, the user sends an input(like move forwards) to the server and the server handles it (which requires the player controller) to move the player

brittle karma Jul 22, 2019, 6:40 PM

#

hey guys, why client cant see the projectile that itself has spawned ?
i ve set the Projectile actor to Replicated one, SetReplicates(true);
and my fire function in the pawn is server function. so basically server is responsible for firing, but why it doesnt show up for client?

📎 Capture.PNG

#

void AMultiplayerBallsBall::OnFire()
{
Server_OnFire();
}

void AMultiplayerBallsBall::Server_OnFire_Implementation()
{
GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("fire fire")));

if (CurrenetLaserAmo > 0)
{
    CurrenetLaserAmo--;
    GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("laser amount is  :: %d"), CurrenetLaserAmo));
    MuzzleLocation = FireLocationSocket->GetComponentLocation();
    MuzzleRotation = FireLocationSocket->GetComponentRotation();


    if (GetWorld()) {
        auto projectile = GetWorld()->SpawnActor<AProjectile>(
            ProjectileBP,
            MuzzleLocation,
            MuzzleRotation
            );
        projectile->MoveProjectile(Speed);
        GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::White, FString::Printf(TEXT("Fire PJ")));
    }
}

}

grizzled bay Jul 22, 2019, 6:42 PM

#

are you also replicating movement?

brittle karma Jul 22, 2019, 6:42 PM

#

yes SetReplicateMovement(true);

#

every thing works fine except client itself cant see the projectile

#

here is logic, server is responsible for firing, so i declared a ufunction(server.....) named Server_OnFire

grizzled bay Jul 22, 2019, 6:47 PM

#

sorry i wouldn't be able to help other than that, usually if your settings right and spawn the item from the server it just seems to work, maybe someone else will have other ideas

brittle karma Jul 22, 2019, 6:49 PM

#

so whenever client fires ,it calls simple Onfire function and inside that Server_OnFire get calls, is this a true logic?

worthy perch Jul 22, 2019, 6:51 PM

#

Do you have a BP child?

brittle karma Jul 22, 2019, 6:51 PM

#

yes

worthy perch Jul 22, 2019, 6:51 PM

#

Check its settings.

ocean geyser Jul 22, 2019, 6:52 PM

#

so on the client, the player shoots and it calls Onfire. then Onfire calls a UFUNCTION that is set for the server called Server_OnFire? Server_OnFire spawns the projectile and moves it in the direction of the muzzle? the server sees the projectile when it spawns, but the client doesnt correct? if its spawning the actor on the server then it should be there for everyone, did you set the projectile to replicate? i think that would prevent it from being seen by clients

brittle karma Jul 22, 2019, 6:52 PM

#

@worthy perch god damn thank you

grizzled bay Jul 22, 2019, 6:52 PM

#

nice

brittle karma Jul 22, 2019, 6:55 PM

#

@ocean geyser as @worthy perch mentioned i checked the Blueprint child for Projectile and i saw that Replicated and Replicated Movement were unchecked i reset their values and it works fine now

ocean geyser Jul 22, 2019, 6:55 PM

#

sweet

grizzled bay Jul 22, 2019, 6:57 PM

#

good to hear

brittle karma Jul 22, 2019, 6:58 PM

#

its weird that sometimes cpp and bp dont match very well.

grizzled bay Jul 22, 2019, 6:59 PM

#

yeah they don't want to play nice sometimes

fossil veldt Jul 22, 2019, 7:37 PM

#

Hey guys, When I disable Replicate Movement why is the client still receiving data for Movement from the server?

high current Jul 22, 2019, 7:37 PM

#

@brittle karma did you fix it?

brittle karma Jul 22, 2019, 7:37 PM

#

yeah @high current

fossil veldt Jul 22, 2019, 7:39 PM

#

I guess I have the opposite problem to Shayan, I don't want the server's character position to be replicated to clients, But UE4 seems to be automatically sending this data even with it unticked

brittle karma Jul 22, 2019, 7:40 PM

#

@fossil veldt can u describe more?

fossil veldt Jul 22, 2019, 7:41 PM

#

I have 2 pawns which have their own movement components. However when I move the server the clients can see this, When I move a client the server doesn't see it

#

But to be clear

#

I don't want the server to see it

#

I want the clients to not see the server moving

#

I have "Replicate Movement" disabled and it's still replicating the movement from the server to the clients and I don't know why

brittle karma Jul 22, 2019, 7:44 PM

#

i guess what u want is something like this.
if(Role < ROLE_Authority)
{
//now its not server, client runs the code
}

fossil veldt Jul 22, 2019, 7:44 PM

#

But why is the code not being run locally anyway?

#

It's not set to replicate position

brittle karma Jul 22, 2019, 7:45 PM

#

can u show some codes?

fossil veldt Jul 22, 2019, 7:45 PM

#

Urrr

#

It's like fuckin huge

#

It's a custom movement component that i've made

brittle karma Jul 22, 2019, 7:45 PM

#

the specific parts, key ones

fossil veldt Jul 22, 2019, 7:46 PM

#

Oh w8 nm I just fixed it :/

#

I turned off replicates

#

I am moving my characters using set physics linear velocity

#

so I guess replicate movement doesn't consider that

brittle karma Jul 22, 2019, 7:47 PM

#

fixed?

fossil veldt Jul 22, 2019, 7:47 PM

#

yea

#

That's really strange that it replicated that honestly

#

Ty for help

#

It's a bit of an unorthodox request as I wanted to manually write the netcode for my movement component

timid moss Jul 22, 2019, 10:20 PM

#

Hey does anyone know if there is an OnPossessed() function for the client?

strong knot Jul 22, 2019, 11:32 PM

#

im getting started with LAN and advanced sessions but finding most documentation is about steam, is there any good recent LAN tutorials anyone could point me in the direction of? thanks!!

gleaming vector Jul 22, 2019, 11:33 PM

#

hey @pallid mesa @winged badger @summer nova we talked the other day about replicated structs and UObjects... I ended up giving up on my approach and made my Item Stack object just a UObject rather than a Struct

#

turns out the GC really doesn't like an array of UObjects inside of a struct that was new'd and put into a TSharedPtr contained within another struct

somber glade Jul 22, 2019, 11:50 PM

#

I've got a rather complicated effect I'm trying to handle properly in a multiplayer VR game, and I'm having trouble getting it right because it's turning into a mess with what i have so far. Break down:

Players can't be stunned by another character. Since this is VR, I rigged up an emote system, both for emotes and usage with this effect. Basically if a player wants to emote, the camera switches to an offbody camera while the character does it's emote animation and then when it's done it snaps back into the body.

The process for being stunned is this: Character receives an event from an interface upon being shot. The interface sets off the following chain: it starts a timer (if the player isn't captured after X time the player gets back up) , sets an animation to play, sets a bool which tells the Anim BP that it should emote (thus ignoring all other animations and just playing a one off animation), and then sets a tag on the players' body so that they can be "captured".

The issue I'm running into is that when they are shot, not only is their camera leaving their body as it should, but the player who shot them is being taken out of their body and set into the emote camera location. Then when it's over, both the character who shot and the character who got shot are being put back into the same body (leaving player who shots' body empty) and then the player who shot's HMD locks and follows the other player's HMD, that's just messed up).

#

because this needs two full players to test properly in VR, I don't have unlimited instant testing to see if I got it right.

#

I zoomed in for this, I just made some changes, the bit to the right is just setting and clearing the tag for capture

📎 stun.png

#

I don't know if this will test properly with 1 VR player and an empty VR avatar in the game. Because when you leave an empty VR avatar in the game it tends to grab onto your hmd and motion controller even though you have your own avatar.

#

What I don't really understand is why the player who shot is having their camera relocated. This code should run on the player who got shot only.

pallid mesa Jul 22, 2019, 11:58 PM

#

@gleaming vector we'll resume if you don't mind the conversation tomorrow

gleaming vector Jul 22, 2019, 11:58 PM

#

sure

#

just ping me, i love talking about this stuff

#

i'll probably have more experience in converting everything to UObjects

#

and the challenges there

pallid mesa Jul 22, 2019, 11:59 PM

#

hehe sure, I'm @ a very low energy rn to discuss anything 💤

winged badger Jul 23, 2019, 12:04 AM

#

@gleaming vector i don't even like having a struct being responsible for managing 1 UObject's lifetime directly

gleaming vector Jul 23, 2019, 12:04 AM

#

yeah, well, item generators create UObjects now

#

for item stacks

#

so I removed structs from the equation completely

winged badger Jul 23, 2019, 12:05 AM

#

i think i had a few encounters with a GC ref counter early on when i started with Unreal

#

now i just got used to putting only weak pointers to UObjects into structs

#

that was one of the factor that led me to two arrays approach i described yesterday

gleaming vector Jul 23, 2019, 12:07 AM

#

yeah

winged badger Jul 23, 2019, 12:07 AM

#

the other being single responsibility principle - my fastarray there is responsible only for keeping client in sync with server, and nothing else whatsoever

gleaming vector Jul 23, 2019, 12:08 AM

#

well, right now I NewObject out an ItemStack and hope whoever is invoking the ItemGenerator stores off the UObject

winged badger Jul 23, 2019, 12:08 AM

#

also its the only thing required to keep the client in sync

gleaming vector Jul 23, 2019, 12:08 AM

#

interesting

#

well, I'll have to see how my stuff works

winged badger Jul 23, 2019, 12:10 AM

#

i don't replicate my attributes at all, except for initial state following character customization (a CharacterData struct, outside the AttributeComponent)

#

i just keep buffs in sync and have each AttributeComponent calculate them on its own

#

basically, i have a single DOREPLIFETIME for the entire attribute system

somber glade Jul 23, 2019, 12:40 AM

#

wooohoo.. i actually fixed my stun effect..

#

the problem is now..

#

for some reason the clients cannot properly control a pawn after possessing

#

Setup: due to a crash with server travel, i used advanced sessions to create a session and then I create a listen server. My lobby and my gameplay level are on the listen server in the same level. The lobby is just a box. After players pick their avatar, the avatar is spawned in the gameplay area and on game start the players depossess their menu avatar. Then the gamemode puts them in the avatar they selected.

#

In this case (current test) the menu avatar and the gameplay avatar are the same class. So they arrive in the lobby, they can move around, they pick their character. The game mode spawns a new copy in the gameplay area, unpossess and sticks them in the new one. They are in the new one. their motion controllers move the hands and head changes rotation. Buttons on the controllers work, but the thumbstick for movement no longer functions.

winged badger Jul 23, 2019, 12:53 AM

#

you always manage to have the weirdest bugs

#

the new Pawns are obviously getting input, so what happens after you use the thumbstick?

somber glade Jul 23, 2019, 1:12 AM

#

nothing

#

the clients can't seem to move.

#

but the buttons on their controllers (like to cloak)

#

do work

winged badger Jul 23, 2019, 1:17 AM

#

i mean, breakpoint in input handler

#

is it not called or does it not execute?

somber glade Jul 23, 2019, 1:17 AM

#

it's a packaged build

#

I"m testing multiplayer VR

#

I'm going to add some print statements

#

but simply unpossessing and possessing a new avatar, that should work right?

#

the host can move just fine

winged badger Jul 23, 2019, 1:19 AM

#

yeah, it usually does

#

which makes the problem likely related to your movement component

#

CMC?

somber glade Jul 23, 2019, 1:20 AM

#

basically I'm doing this: The game mode spawns a new avatar based on their selection, then it calls to the PC and passes on a reference to the new pawn.

#

the PC unpossess the current pawn and possesses the new one passed in

winged badger Jul 23, 2019, 1:20 AM

#

you are using the CharacterMovementComponent, right?

#

that code would fail equally for host and client unless you custom modified it

somber glade Jul 23, 2019, 1:21 AM

#

📎 posssess.png

#

Yes

winged badger Jul 23, 2019, 1:21 AM

#

im interested in what your movement mode is on the CMC

somber glade Jul 23, 2019, 1:21 AM

#

well VRexpansion pack has it's own

#

VRMovementreference

winged badger Jul 23, 2019, 1:21 AM

#

after you possess the other Pawn, on client

somber glade Jul 23, 2019, 1:21 AM

#

let me see what that parents back to

winged badger Jul 23, 2019, 1:22 AM

#

i am suspecting "None"

somber glade Jul 23, 2019, 1:22 AM

#

it's inherited from C++ so I'll look it up now

#

what's weird is that this was working before. And About two weeks ago I had the opposite issue. The client would join the lobby, and they couldn't move, but when the game started, they could suddenly move again.

#

oh no here we go: class VREXPANSIONPLUGIN_API UVRBaseCharacterMovementComponent : public UCharacterMovementComponent

#

it parents back to CMC

meager spade Jul 23, 2019, 1:26 AM

#

In your character tick print the movement mode

somber glade Jul 23, 2019, 1:26 AM

#

That's going to get messy in multiplayer.. I'll try doing it once and set it to 20 seconds otherwise with 2 players spamming on tick I'll never be able to read it

#

especially in VR, since it just makes everything blurry and weird even on the desktop mirror

#

I wish you could change the font size of the print

winged badger Jul 23, 2019, 1:27 AM

#

it prints into the log file, too

somber glade Jul 23, 2019, 1:28 AM

#

the actual text log generated after? okay

timid moss Jul 23, 2019, 1:28 AM

#

Why cant I do DOREPLIFETIME_CONDITION for replicated props in an actor component? Does it just not have it?
Im used to coding on an actor

meager spade Jul 23, 2019, 1:28 AM

#

Of course you can

timid moss Jul 23, 2019, 1:28 AM

#

thats weird then

#

not working for me

meager spade Jul 23, 2019, 1:29 AM

#

What's the error

somber glade Jul 23, 2019, 1:29 AM

#

@meager spade Are you referring to this?

📎 movement.png

meager spade Jul 23, 2019, 1:29 AM

#

No just movement mode

winged badger Jul 23, 2019, 1:29 AM

#

not including UnrealNetwork.h

#

i'd imagine

meager spade Jul 23, 2019, 1:30 AM

#

We want local and server versions of the actual movement mode

timid moss Jul 23, 2019, 1:30 AM

#

ok for some reason you saying that made it work XD

somber glade Jul 23, 2019, 1:30 AM

#

this one?

📎 movement2.png

meager spade Jul 23, 2019, 1:31 AM

#

Yes

somber glade Jul 23, 2019, 1:32 AM

#

Okay, I'll build that then and send that off, back shortly once I've got a result. While I'm waiting for that. how can I make sure that tags are replicated? Part of my stun function setting a tag on the downed player. I'm setting that tag as part of the "run on server", but I think that isn't being replicated. When I then tried to run the capture function which checks for that tag, nothing happened.

winged badger Jul 23, 2019, 1:39 AM

#

GameplayTag or just Actor Tag?

somber glade Jul 23, 2019, 1:40 AM

#

Actor Tag

winged badger Jul 23, 2019, 1:41 AM

#

those don't replicate

somber glade Jul 23, 2019, 1:41 AM

#

📎 stun2.png

#

Ahha

#

So I should set a bool on the player instead?

winged badger Jul 23, 2019, 1:41 AM

#

or use the actual GameplayTags

#

depending on how many states you plan on having

somber glade Jul 23, 2019, 1:42 AM

#

just 2. Capturable or not capturable.

winged badger Jul 23, 2019, 1:42 AM

#

because

#

when you have Incapacitated.Stunned, Incapacitated.KnockedDown and Incapacitated.Dead

somber glade Jul 23, 2019, 1:42 AM

#

But I didn't realize that actor tags don't replicate. I use tags elsewhere for things like keycards (adding tags as they upgrade them from level 1, 2, 3) doors check those tags.

#

good to know they don't replicate. I'll change that

winged badger Jul 23, 2019, 1:42 AM

#

with GameplayTags you can just check for Incapacitated

#

and have it match any of those 3

somber glade Jul 23, 2019, 1:43 AM

#

Okay after this VR test i'll look those up and how to do them.

#

the keycards will definitely have 3 states

winged badger Jul 23, 2019, 1:44 AM

#

if you prefer the Tag approach to bools/enums

#

and need them replicated

#

GameplayTags is definitely the way to go

somber glade Jul 23, 2019, 1:44 AM

#

Tags seemed like a quick way to identify a lot of things.

#

but I didn't realize actor tags weren't replicated.

#

I suppose I could set them with a multicast if I really wanted to just replicate an actor tag.

winged badger Jul 23, 2019, 1:45 AM

#

yeah, but those are FNames

#

so they are replicated as Strings

#

not really on cheap side

#

you can't invent a GameplayTag in runtime

somber glade Jul 23, 2019, 1:45 AM

#

ah okay

winged badger Jul 23, 2019, 1:45 AM

#

all have to be predefined

#

which also lets them replicate as integers

somber glade Jul 23, 2019, 1:47 AM

#

Ah, okay

#

@winged badger @meager spade Move_walking but it looks like the client avatar isn't ticking

#

[2019.07.23-01.54.06:872][999]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Player State Valid
[2019.07.23-01.54.06:873][999]OSS.VoiceLoopback = "0"      LastSetBy: Constructor
[2019.07.23-01.54.06:878][999]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] Grip Components
[2019.07.23-01.54.06:879][999]LogHMD: SetSpectatorScreenMode(5).
[2019.07.23-01.54.06:880][999]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] Player State Valid```

#

both avatars seem to run their setup

#

on possession

#

or actually that comes off begin play

#

📎 beginplay.png

#

You can see the setup for the avatars there.

#

that print only seems to run once per avatar

#

However after that, [2019.07.23-01.54.07:291][ 14]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] MOVE_Falling [2019.07.23-01.54.07:296][ 15]LogRenderer: Reallocating scene render targets to support 256x256 Format 10 NumSamples 1 (Frame:6982). [2019.07.23-01.54.07:324][ 15]LogRenderer: Reallocating scene render targets to support 2688x1600 Format 26 NumSamples 1 (Frame:6982). [2019.07.23-01.54.07:324][ 15]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] MOVE_Walking [2019.07.23-01.54.07:327][ 16]LogRenderer: Reallocating scene render targets to support 256x256 Format 10 NumSamples 1 (Frame:6983). [2019.07.23-01.54.07:347][ 16]LogRenderer: Reallocating scene render targets to support 2688x1600 Format 26 NumSamples 1 (Frame:6983). [2019.07.23-01.54.07:347][ 16]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] MOVE_Walking [2019.07.23-01.54.07:368][ 17]LogRenderer: Reallocating scene render targets to support 256x256 Format 10 NumSamples 1 (Frame:6984). [2019.07.23-01.54.07:368][ 17]LogRenderer: Reallocating scene render targets to support 2688x1600 Format 26 NumSamples 1 (Frame:6984). [2019.07.23-01.54.07:368][ 17]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_1] MOVE_Walking the client doesn't report any print on tick

#

that falling probably comes from the fact that the avatar spawn spot is just slightly off the ground.

#

The client only sees this event: [2019.07.23-00.16.27:192][297]LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Player State Valid he doesn't get the grip components message, which is really weird, because the player state isn't printed until after grip components. I have no idea how it could receive 1 print and not the other.

#

Apparently I had this issue 12 days ago on a different build, and fixed it. But i've been working 16-18 hours a day since then and my mind is too numb to remember what I did 12 days ago haha. Off to source control to see if I can figure out what i changed.

naive crater Jul 23, 2019, 3:16 AM

#

Has anyone been able to get camera anims to play after a server travel?

somber glade Jul 23, 2019, 3:18 AM

#

@winged badger this seems to be an issue with the client neither calling onpossession nor onrep_controller

#

LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Server: On Possession
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Server: Grip Components
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Server: Player State Valid
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Client 1: Begin Pla
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Client 1: Grip Components
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Client 1: Player State Not Valid
LogBlueprintUserMessages: [BP_VRPlayerAvatar_C_0] Client 1: Player State Valid```

#

I'm currently testing this in PIE, I set up the gamemode to autostart, so I've ticked dedicated server and set my VR instance to be a client.

winged badger Jul 23, 2019, 3:24 AM

#

client shouldn't call OnPossession

#

and good hook for custom setup is PCs SetPawn function, its called from both Possess and OnRep_Pawn

somber glade Jul 23, 2019, 3:27 AM

#

if I just plug begin play into the front where it sets the movement mode, it works.

#

and how that i have a test environment with a working client that I can control directly. I notice that none of my dynamic material instances are replicating properly.

#

📎 fixed.png

#

This basically fixes it

winged badger Jul 23, 2019, 3:29 AM

#

if that OnRep didn't fire

#

its most likely wired incorrectly in c++

somber glade Jul 23, 2019, 3:29 AM

#

I got that from Exi

#

let me pull up the code

#

        void K2_OnRep_Controller();

    virtual void OnRep_Controller() override;```

#

{
    Super::OnRep_Controller();

    K2_OnRep_Controller();
}```

#

I do have onrep_pawn made blueprint implementable if you think that might help.

somber glade Jul 23, 2019, 4:53 AM

#

For now that issue is solved. I need to move back to dynamic material instances. which just won't replicate. I have the server calling to my door access panel to set up the panel. When it sets it up, it creates 2 dynamic material instances for the exterior panel and interior panel. It saves these to replicated variables. Then it checks the locked state of the door and updates a variable either red or green depending on if it is locked. That variable is rep notify. The client is getting the rep notify, which should set the variable on the instance to those values, but the client always gets "none" for the two saved material instances.

#

This is called from the gamemode, it goes through and initializes all the door panels with meshes, and sets their connected door as a variable (connected door is set in editor)

📎 dmi1.png

#

after setting both materials and the variable it calls this function which checks the actual color and sets the rep notify variable

📎 dmi2.png

#

which calls this and fails because both DMI variables report "none"

📎 dmi3.png

winged badger Jul 23, 2019, 6:18 AM

#

OnRep fires before BeginPlay for a spawned replicated actor

#

Should make a function that gets the dmis, creating and caching them if tgey dont already exist

unique thunder Jul 23, 2019, 6:26 AM

#

📎 unknown.png

#

Why won't this work in a networked game? I've tried running it on server, on server then multicast, nothing seems to override its relative rotation

#

The actor is set to replicate (I also tried setting the component itself to replicate)

somber glade Jul 23, 2019, 7:12 AM

#

@winged badger Yeah I'm trouble shooting this now. i decided to make my DMIs in the constructor per another suggestion. This seems to work..except my manager struct is acting weird as can be now. It starts play empty, no entries. Yet the first time I hit the node to add something to it, it's already reporting a ton of entries

#

📎 man2.png

#

📎 man1.png

#

empty ones

#

it's actually creating the struct..but.. it's not putting it in the array.

📎 man3.png

#

this part seems to work.

#

better view, this runs on "has authority" so only the server should run this

📎 man6.png

#

....

#

I cleared the monitormanager array before the for loop and suddenly it's working

#

but there is no point anything should be added to this..

#

still not working though. This is in the information in the struct. But when I'm inside the for loop, why can't I see what's actually being set?

📎 man7.png

#

📎 man8.png

#

the only thing I can get any value on is the text

#

because the monitors are still all coming up black now

somber glade Jul 23, 2019, 7:58 AM

#

📎 man11.png

#

I've got a break further down the line and it never comes

#

@winged badger So that explains what's going on..for some reason my client is never getting this onrep notify

#

LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_1
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_2
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_3
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_4
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_5
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_6
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Set Render Target: TextureRenderTarget2D_7``` but the value is being set for each one

chrome bay Jul 23, 2019, 8:13 AM

#

You can't replicate a render target

#

Not unless it's a static asset.

#

Apart from the fact they have no replicated properties anyway, they are derived from UObject which needs special case-by-case handling for replication, and can only be done from C++

#

You can't replicate dynamic material instances either

somber glade Jul 23, 2019, 8:17 AM

#

I realize that. My DMIs are set in construct

#

The render target isn't the only thing in the struct.

chrome bay Jul 23, 2019, 8:18 AM

#

That's fine but your replicating Monitor Manager, many of those entries will be null client-side, or you'll get an error about trying to replicate an object reference that can't be resolved.

somber glade Jul 23, 2019, 8:18 AM

#

Okay, but no onrep is being called from this.

#

Even if I try to onrep a bool

chrome bay Jul 23, 2019, 8:18 AM

#

Are you sure the actor is actually replicating?

somber glade Jul 23, 2019, 8:19 AM

#

I set up this

📎 man12.png

#

📎 man13.png

#

and did this

chrome bay Jul 23, 2019, 8:19 AM

#

Have you told the actor to replicate?

somber glade Jul 23, 2019, 8:19 AM

#

and it never calls

#

yes

#

📎 man14.png

#

it does call that repnotify on the server, it never calls it on the client.

chrome bay Jul 23, 2019, 8:20 AM

#

Is it relevant at the time?

#

I.e., within 150 meters of the players viewpoint?

somber glade Jul 23, 2019, 8:20 AM

#

it's in the level when the game starts, and it's about 3 meters from the player's avatar

chrome bay Jul 23, 2019, 8:21 AM

#

Check 'Always Relevant' for now - just to be certain

somber glade Jul 23, 2019, 8:21 AM

#

I just did that, and nope

#

I put a print after the bool it's running

chrome bay Jul 23, 2019, 8:22 AM

#

Is the replicated value actually different from the default?

somber glade Jul 23, 2019, 8:22 AM

#

Yes, it's false in the settings

#

put two in a row break point still didn't hit

📎 man15.png

chrome bay Jul 23, 2019, 8:24 AM

#

Well setting it to false and true again in a single frame means it won't replicate, so that I understand

somber glade Jul 23, 2019, 8:25 AM

#

put a delay between, still nothing

chrome bay Jul 23, 2019, 8:25 AM

#

This worked fine on my end:

#

📎 Cap1.JPG

#

📎 Rep2.JPG

#

Got both a server and client 'Hello' message

#

If you're setting those variables server and client-side, you won't get the rep notify.

#

Rep Notifies only fire when the value replicates and is different from it's current value.

#

In C++ you get more control over that

somber glade Jul 23, 2019, 8:27 AM

#

Theyr'e only being set on a call from the server.

#

the game mode is calling an "init" function on this actor

#

but I changed it to begin play

chrome bay Jul 23, 2019, 8:27 AM

#

When is it doing that? It might be too early for the actor to know what it's role is

somber glade Jul 23, 2019, 8:27 AM

#

which I had originally, no change.

#

📎 man16.png

#

there is a .2 delay after and a .2 delay before the second change

chrome bay Jul 23, 2019, 8:29 AM

#

Unplug everything and just test the bool for now

#

Make it false by default, then set it to true, and check if the rep notify fires

somber glade Jul 23, 2019, 8:29 AM

#

put a delay of 5 seconds nada

#

one second

chrome bay Jul 23, 2019, 8:29 AM

#

Tells me the actor itself isn't replicating

somber glade Jul 23, 2019, 8:30 AM

#

Yes that works

#

LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Client 1: Hello```

chrome bay Jul 23, 2019, 8:32 AM

#

kk, so something must be going wrong with the loop. Are you using dedicated or listen server?

somber glade Jul 23, 2019, 8:32 AM

#

it's a listen level.

#

normally there is a lobby where players pick their avatar and then hit a button to start, but I moved the start to test these monitors

#

this stuff would set up in the background while they are picking their avatars

#

I ran my construct stuff and ran the test again and it was fine

#

so it must be that loop, but it's a fairly standard loop..just for each on the array and make a new array

chrome bay Jul 23, 2019, 8:33 AM

#

If you're running stuff on construct it's too early to know if the actor is on the server or a client

somber glade Jul 23, 2019, 8:35 AM

#

Im just setting the DMI's on construct

#

that's not really relevant.

#

I tried adding a flip flop to the loop

#

and setting the bool

#

LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Hello
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Hello
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Hello
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Server: Hello
LogBlueprintUserMessages: [BP_CCTVMonitor_New_5] Client 1: Hello```

#

📎 man17.png

#

I stuck it there

chrome bay Jul 23, 2019, 8:37 AM

#

Well you'll only get one rep notify, and even then only if the result value is different from when the loop started.

#

The loop runs instantly, the network thread will gather differences at the end of the frame and send them out

#

If you ran that loop one more time it wouldn't be different from the default and wouldn't replicate

somber glade Jul 23, 2019, 8:39 AM

#

do you think because I'm running pie, that the "is server" isn't returning properly?

#

even though I'm a client

#

nope that's working properly

#

Previously, where i had everything set up on begin play, the CCTV cameras would work fine. The problem was if one of them got EMP'd the client couldn't see the black render target that took its place.

#

So it was suggested that I set up the DMIs in construct, which I've done, but now I can't get the screens to show anything but black.

#

ahha

#

it looks like the only way I can do it is to set up each monitor individually

#

I am doing something similar on my door lock, it's got 2 static meshes each with a DMI, but there are variable references made in the construct, not replicated, that works. But it seems the client can't pull any of this out of the struct.. I thought I was being clever with this struct. It was a really efficient tool for doing this really fast

#

it can get the render target, but not the reference to the DMI

#

oddly it can't get the reference to the monitor screen..

#

which is a static mesh

somber glade Jul 23, 2019, 9:28 AM

#

@chrome bay This "works" in terms of the camera displaying when the game starts. However if I turn around and try to call exactly the same code with a "rep notify"

📎 man18.png

#

📎 man19.png

#

Like this, it doesn't work.

📎 man20.png

#

in the repnotify it claims all the variables are "none".

#

It's like during begin play it knows what that array is, but then it just loses it once a repnotify goes out

high current Jul 23, 2019, 9:30 AM

#

Is the array created during runtime?

somber glade Jul 23, 2019, 9:31 AM

#

Yes

high current Jul 23, 2019, 9:31 AM

#

If so, shouldnt it be replicated

somber glade Jul 23, 2019, 9:31 AM

#

not on 'has authority' so the client has its own copy

#

its not

#

okay..

#

it's like there is some kind of race condition going on

#

I start the game, and it throws up garbage about all those variables being "none"

#

then I stop and start again, changing nothing

#

and it works

#

start/stop again and it fails

high current Jul 23, 2019, 9:33 AM

#

Start stop meaning you stop playing in pie?

somber glade Jul 23, 2019, 9:33 AM

#

yeah

#

I tried putting a longer delay after begin play but that didn't help

#

I took out the delay and now its worked 5 times in a row

high current Jul 23, 2019, 9:35 AM

#

📎 Screenshot_Discord_20190723-123404.png

#

From this i see that you are seting the var on authority, but its not replicated, so clients wont have it

somber glade Jul 23, 2019, 9:36 AM

#

that's an old shot

#

like 15 versions ago at this point 😉

high current Jul 23, 2019, 9:36 AM

#

Ah i see

somber glade Jul 23, 2019, 9:36 AM

#

📎 man21.png

#

Now the only "has authority" is before the bool

#

I scrapped the struct entirely

#

which is a shame, I really liked that loop

meager spade Jul 23, 2019, 9:37 AM

#

there was nothing wrong with the loop

somber glade Jul 23, 2019, 9:38 AM

#

Yes..it looks like now it was because of the delay

meager spade Jul 23, 2019, 9:38 AM

#

why are your cameras seperate bools?

somber glade Jul 23, 2019, 9:38 AM

#

I removed that 0.2 delay and 10 times in a row I got my cameras

meager spade Jul 23, 2019, 9:38 AM

#

like cam0 set

#

etc

somber glade Jul 23, 2019, 9:38 AM

#

Because I've been debugging this all afternoon and this is attempt #283

#

so I'm trying anything at this point to make it work

meager spade Jul 23, 2019, 9:38 AM

#

you would be far better off with a replicated struct

#

TArray

#

which holds if the camera is set, etc

#

and onrep that

somber glade Jul 23, 2019, 9:39 AM

#

I tried something like that 2 days ago, it wasn't working.

#

One of the first things I tried to do was onrep the struct array

meager spade Jul 23, 2019, 9:39 AM

#

we use replicated TArray's never had issues

somber glade Jul 23, 2019, 9:39 AM

#

but it seems the reference to the DMI can't be replicated

#

so the client can never pull the DMI out of the struct

#

it was always coming back none

meager spade Jul 23, 2019, 9:40 AM

#

DMI?

somber glade Jul 23, 2019, 9:40 AM

#

dynamic material instance

#

for the monitor

meager spade Jul 23, 2019, 9:40 AM

#

why would you replicate that?

somber glade Jul 23, 2019, 9:40 AM

#

because when it updates the scalar value it needs a reference.

high current Jul 23, 2019, 9:40 AM

#

Welp afaik DMI's are client side...

meager spade Jul 23, 2019, 9:40 AM

#

then store it locally

#

thats the idea

#

you update values in the struct

somber glade Jul 23, 2019, 9:41 AM

#

texture parameter.

meager spade Jul 23, 2019, 9:41 AM

#

for that camera

#

then on rep recieves it

#

grabs its local material instance

#

and adjusts its scalar

high current Jul 23, 2019, 9:41 AM

#

Replicate whatever you need to create the DMI, not it itself

somber glade Jul 23, 2019, 9:41 AM

#

That's what I had long ago. But it wasn't working.

meager spade Jul 23, 2019, 9:42 AM

#

then you did something wrong

somber glade Jul 23, 2019, 9:42 AM

#

it worked in terms that the player could see the CCTV

#

but when it was EMP'd and I needed to replace the render target to turn it black it wouldn't work

meager spade Jul 23, 2019, 9:42 AM

#

you set a flag on the camera when its been emp'd

#

the onrep will then tell the clients to apply the emp render target

#

seems pretty easy to me

somber glade Jul 23, 2019, 9:44 AM

#

This is the function I've got on the CCTV. When it get's EMP'd it goes to the monitor, gets the manager, updates it's parameters in the array and sets the new render target.

📎 man22.png

#

The client wasn't seeing this change.

meager spade Jul 23, 2019, 9:46 AM

#

right but you need to run the Set Texture Scalar locally

somber glade Jul 23, 2019, 9:46 AM

#

That wasn't being run with authority.

meager spade Jul 23, 2019, 9:46 AM

#

why is the local setting the camera disabled

#

that should have been done on the serrver

somber glade Jul 23, 2019, 9:47 AM

#

Just to keep track of its index.

meager spade Jul 23, 2019, 9:47 AM

#

oh i see

somber glade Jul 23, 2019, 9:47 AM

#

so when it's repaired, it can go back to that index quickly to reset the texture parameter

meager spade Jul 23, 2019, 9:47 AM

#

kinda pointless cause you are still waiting for server to tell you its repaired

somber glade Jul 23, 2019, 9:47 AM

#

I'm going to revert the changes to the monitor if you think there is a way to make this work

meager spade Jul 23, 2019, 9:48 AM

#

is each monitor an actor?

somber glade Jul 23, 2019, 9:48 AM

#

1 actor with 8 static meshes

meager spade Jul 23, 2019, 9:48 AM

#

and monitor manager holds all monitors server side?

somber glade Jul 23, 2019, 9:48 AM

#

The monitor manager was written to quickly automate handling the association between the 8 cameras and monitors.

#

it doesn't need to be server if the clients need access to a copy

meager spade Jul 23, 2019, 9:49 AM

#

yeah that's fine, and it should be server unless you want to allow clients to manipulate the cameras locally

somber glade Jul 23, 2019, 9:49 AM

#

Well yes because they have to update the texture locally

#

so they need a copy of that array to do so

meager spade Jul 23, 2019, 9:49 AM

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doesnt matter

somber glade Jul 23, 2019, 9:49 AM

#

otherwise they can't see it go black

meager spade Jul 23, 2019, 9:50 AM

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you tell the camera what to do

#

from the camera manager

#

the camera replicated?

somber glade Jul 23, 2019, 9:51 AM

#

of course. Like I said, they worked up to the camera turning black. WHen hit with an EMP they'd stop panning, just the render target wouldn't change

#

one secon

#

i'll revert this mess

high current Jul 23, 2019, 9:53 AM

#

I think i told you this a while back, but i think the timins of the rep notify, and the texture target var mismatch, so when the rep notify runs on clients, the texture target isnt yet updated and therefore it is not equal to the struct

#

Just guessing tho

somber glade Jul 23, 2019, 9:55 AM

#

Yeah when we talked thats when I started looking at trying to use a rep notify to change it.

#

okay I'm back to baseline

#

One thing I don't get is the difference between my doors and my cameras. Both run on timelines. My door, when a keycard overlaps, the overlap runs on "has authority" checks to make sure it can open, then calls an interface to the timeline which opens the door. no problem. My camera runs on an interface, when it gets hit by the EMP it checks "has authority" and calls to the timeline to make it stop panning, and it doesn't. The projectile is created by an RPC

somber glade Jul 23, 2019, 10:34 AM

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@meager spade Okay, so with current testing, the client shoots the camera with an EMP. The camera stops moving, and the render target stops updating, but it doesn't turn black

meager spade Jul 23, 2019, 10:35 AM

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then you are missing something on the clients materials

somber glade Jul 23, 2019, 10:35 AM

#

this first issue I had was my interface. When you make a C++ interface blueprintimplementable, you get 2 events.

#

one has that little blue arrow thing the other doesn't

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I had the wrong one on the camera

meager spade Jul 23, 2019, 10:36 AM

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i never use BP Implementables in c++ interface

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i just mark thm NativeEvents

somber glade Jul 23, 2019, 10:36 AM

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sorry they are native

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either way you get 2 events

meager spade Jul 23, 2019, 10:36 AM

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no you dont

somber glade Jul 23, 2019, 10:36 AM

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one is the right one, one is "wrong"

meager spade Jul 23, 2019, 10:37 AM

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you have done something wrong then

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i never have two events

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from a BP Native

somber glade Jul 23, 2019, 10:37 AM

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then what's this?

📎 man25.png

#

        void EMPReceive();```

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that's my code from C++

#

All my actors that have that C++ interface have both those events

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obviously only one of them is the right one

#

but I set the cameras up like 3 months ago when I was first learning c++ events and dragged out the wrong one

bright perch Jul 23, 2019, 10:54 AM

#

Hey I just want to make an enterable vehicle and simply I don't want to posses it,instead I want to control it without possessing it,is it possible and also I the server and client both to be able to drive the car as it is an multiplayer game,thanks for everyone giving suggestionsunreal grinning

somber glade Jul 23, 2019, 10:56 AM

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wow..it's totally working. thanks all

#

I do have one outstanding issue with doors. My doors work. They open when the client puts the keycard on the panel. They run on the timeline as they should. But when I try to walk through, it's like there is something sticky where the door used to be. My character goes through with a slight hitch, and any items I'm carrying get yanked out of my hands.

#

That's the function I use to open the doors. The door and all its parts are replicated. And movement is replicated as well

📎 man26.png

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it opens via the interface.

pallid mesa Jul 23, 2019, 11:17 AM

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a quick update on the weird a.f. bug where my owning client was moving around after a possession. Got to replicate it on a blank project using network culling to replicate late joiners

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it's so weird it hurts, I'll make a couple videos to update what I think is the best & +weirdest bug I've seen in years

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https://discordapp.com/channels/187217643009212416/221799385611239424/602804256365477888

pallid mesa Jul 23, 2019, 11:33 AM

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is open door called from the server?

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@somber glade

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replicate movement needs to be off for the door, what you might want to do is to replicate the timeline

fierce horizon Jul 23, 2019, 11:42 AM

#

Hello Devs! I'm facing an issue running a multiplayer project where 8-12 players plays together. This runs on a Dedicated Server. Everything works fine when clients are playing at a limit of 60 fps, but when a client goes over 90, they start to see rubber banding of the characters movement. Really hoping that someone can help on this one.

UE version used : 4.22.2

somber glade Jul 23, 2019, 11:48 AM

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@pallid mesa That door open is called from an interface.

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player holds a card when it touches the door panel the interface makes that call and it runs on authority.

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The door opens.

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Both server and client can see it

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server can pass through no problem.

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client "hitches"

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and anything they car is blocked.

pallid mesa Jul 23, 2019, 11:48 AM

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but answer

somber glade Jul 23, 2019, 11:49 AM

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I just tried this in a FPS so I could unpossess.

pallid mesa Jul 23, 2019, 11:49 AM

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is it called on the server

somber glade Jul 23, 2019, 11:49 AM

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I just said it's called from an interface with "has authority"

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There isn't an RPC that opens it

pallid mesa Jul 23, 2019, 11:49 AM

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okay that rpc answers it

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is the rpc a server call

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or a multicast

somber glade Jul 23, 2019, 11:49 AM

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I said there isn't one

pallid mesa Jul 23, 2019, 11:50 AM

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okay so if you have authority on the open door event

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then you gotta replicate the timeline

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and that's it

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so every client will get the memo

somber glade Jul 23, 2019, 11:51 AM

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📎 man29.png

pallid mesa Jul 23, 2019, 11:51 AM

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another issue you might have is your replicated relative position

somber glade Jul 23, 2019, 11:51 AM

#

📎 man28.png

#

📎 man30.png

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That's the entirety of the function that opens the door

pallid mesa Jul 23, 2019, 11:51 AM

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yes okay that first bit until unlock seems to be aight and called from the server

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now, for every client to get the memo

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of the updated position of the door

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you need to replicate the timeline

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that or just multicast to everyclient the timeline so everyone gets the memo of the door moving

somber glade Jul 23, 2019, 11:52 AM

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okay

pallid mesa Jul 23, 2019, 11:52 AM

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not just the server

somber glade Jul 23, 2019, 11:52 AM

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I"ll tick those boxes and test it

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@pallid mesa You're a genius

pallid mesa Jul 23, 2019, 11:55 AM

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😄

bright perch Jul 23, 2019, 12:40 PM

#

Hey I just want to make an enterable vehicle and simply I don't want to posses it,instead I want to control it without possessing it,is it possible and also I the server and client both to be able to drive the car as it is an multiplayer game,thanks for everyone giving suggestionsunreal grinning

high current Jul 23, 2019, 12:42 PM

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you can forward inputs from the player to the car

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but why dont you want to possess it

unique kelp Jul 23, 2019, 12:50 PM

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Is it normal for saved moves to accumulate (up to 12, then I get a location correction) when testing with 200ms of ping?

fierce horizon Jul 23, 2019, 12:53 PM

#

Hello Devs! I'm facing an issue running a multiplayer project where 8-12 players plays together. This runs on a Dedicated Server. Everything works fine when clients are playing at a limit of 60 fps, but when a client goes over 90, they start to see rubber banding of the characters movement. Really hoping that someone can help on this one.

UE version used : 4.22.2

unique kelp Jul 23, 2019, 12:54 PM

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Actually I'm still getting corrections from the server even when the saved moves is 0 and the velocities are the same

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cool

jade gazelle Jul 23, 2019, 1:04 PM

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Is it more efficient to replicate say 3 individual float variables, or one struct containing the 3 floats? On one hand if the whole struct needs to be replicated any time one of the float values changes, that seems like it would be worse. But I’m not sure if there are benefits from just having viewer total replicated variables that would outweigh that

indigo robin Jul 23, 2019, 1:05 PM

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well each replicated property has an index and replication is done with a bitfield with 1 bit per property isnt it ?

jade gazelle Jul 23, 2019, 1:05 PM

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Maybe, that’s way beyond my current knowledge of the replication system, haha

indigo robin Jul 23, 2019, 1:06 PM

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so you trade flexibility of being abvle to update the properties independently to having couple of less bits

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sometimes you dont want them to update independently either, so then they have to be in a struct

jade gazelle Jul 23, 2019, 1:07 PM

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Right, that’s kind of my question. does the efficiency from having less total replicated objects outweigh the benefit of having independently replicated objects

indigo robin Jul 23, 2019, 1:07 PM

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well they arent objects ?

jade gazelle Jul 23, 2019, 1:07 PM

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Objects was the wrong word

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I mean values

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Basically I’m trying to see if it would be beneficial to bundle some data into a struct for replication purposes, but this data is otherwise unrelated and doesn’t necessarily update together

indigo robin Jul 23, 2019, 1:09 PM

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then dont

bright perch Jul 23, 2019, 1:09 PM

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actually,I don't want to posses it because it is a very large game and when I posses it the server can sit in the car but not the client and so I thought of trying some other way,I also tried creating custom events that run on server and are reliable but don't know what is going on with my luck😟 it didn't work even. @high current

unique kelp Jul 23, 2019, 1:10 PM

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Wrong guy to reply to mate 😄

indigo robin Jul 23, 2019, 1:10 PM

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if they dont update together then whenever you update one the other will be sent along for no reason @jade gazelle

bright perch Jul 23, 2019, 1:11 PM

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Sorry,didn't see it in hurry @unique kelp

thin stratus Jul 23, 2019, 1:11 PM

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If you can't get possession working for the car, then it's a different issue you are having

bright perch Jul 23, 2019, 1:11 PM

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?

thin stratus Jul 23, 2019, 1:11 PM

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Based on the server can sit in the car but not the client I assume you are unaware of how to properly use Possess

bright perch Jul 23, 2019, 1:11 PM

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?

high current Jul 23, 2019, 1:11 PM

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didnt @ vor have a similar issue with CMC the other day

thin stratus Jul 23, 2019, 1:11 PM

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It should work just well by possessing the car and then controlling it

bright perch Jul 23, 2019, 1:12 PM

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But it isn't

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?

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Do not know how

thin stratus Jul 23, 2019, 1:12 PM

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Then you are doing it wrong. Where are you calling possess?

bright perch Jul 23, 2019, 1:12 PM

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After destroying the actor

jade gazelle Jul 23, 2019, 1:12 PM

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Right. So I guess what you are saying is any benefit from having less total replicated variables would be vastly outweighed by the inefficiency of the struct always sending all values regardless of their need to update or not. @indigo robin

thin stratus Jul 23, 2019, 1:12 PM

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On the Server I assume?

bright perch Jul 23, 2019, 1:12 PM

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Yes

thin stratus Jul 23, 2019, 1:12 PM

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Cause if you call Possess on the Client, it won't work

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Which your server can sit in the car but not the client suggests you are doing

bright perch Jul 23, 2019, 1:13 PM

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I am doing it in my character blueprint

thin stratus Jul 23, 2019, 1:13 PM

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If you interact with an object in the world and you need to execute something on the Server side of it, you need to RPC first

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And not in the object you are interacting with

bright perch Jul 23, 2019, 1:13 PM

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RPC means?

thin stratus Jul 23, 2019, 1:13 PM

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Cause that's most likely Server owned

bright perch Jul 23, 2019, 1:13 PM

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Ok

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So where can I switch it on or where to do the roc work

thin stratus Jul 23, 2019, 1:14 PM

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Please brush up your knowledge by reading the Compendium linked in the pinned messages of this channel.
That exists so we don't have to explain RPC every time

bright perch Jul 23, 2019, 1:14 PM

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Right

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I'll do it

thin stratus Jul 23, 2019, 1:14 PM

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You are using some sort of input to enter the car

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e.g. Press E I assume

bright perch Jul 23, 2019, 1:14 PM

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Yes

thin stratus Jul 23, 2019, 1:14 PM

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That press E has to cause a ServerRPC inside the Character.

bright perch Jul 23, 2019, 1:14 PM

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Right

thin stratus Jul 23, 2019, 1:14 PM

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Then Trace or whatever you are using to get the Car reference

bright perch Jul 23, 2019, 1:15 PM

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Ok,Let me read the compendium

thin stratus Jul 23, 2019, 1:15 PM

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And possess it on the ServerSide

bright perch Jul 23, 2019, 1:15 PM

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Ok

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Whoa wait how to posses on serverside

high current Jul 23, 2019, 1:17 PM

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Read up the compendium, should be clearer afterwards

bright perch Jul 23, 2019, 1:28 PM

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Thanks, I understood now simply I shouldn't be creating the code in the character instead inside the player controller so it goes to server and owning client and when he presses the E key that time it would cast to that RPC custom event and it'll do it,thanks a lot @thin stratus

thin stratus Jul 23, 2019, 1:28 PM

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You can do it in the Character too, but PlayerController might actually be smarter as you can recycle the possession code when existing the car (plus keeping a reference to the unpossessed character)

bright perch Jul 23, 2019, 1:32 PM

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Yup,thanks a lot

somber glade Jul 23, 2019, 1:49 PM

#

after the game mode spawns this avatar, if the character is this time it spawns this device and attaches it to the mesh. This works fine when the character is controlled by the host, but when it's controlled by the client is spawns, but doesn't attach. The event itself is called directly from the game mode, so it's the server doing the spawning. Do I need to put this function inside the game mode?

📎 spawn.png

pallid mesa Jul 23, 2019, 2:04 PM

#

@thin stratus got to replicate the bug I was having in a development build inside the engine, here it is, if you have the time and the energy, give it a look if you don't mind, let's see if we can find the "dumb spot" https://www.youtube.com/watch?v=oMB-mp8yj2w

YouTube

vorixo

Netcull bug

▶ Play video

thin stratus Jul 23, 2019, 2:05 PM

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@pallid mesa One thing I would do is move the Attach to an OnRep

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Cause Attach is not replicated

pallid mesa Jul 23, 2019, 2:06 PM

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it is replicated afaik

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with an onrep and all the parafernalia

thin stratus Jul 23, 2019, 2:06 PM

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Attach is not replicated

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You are limiting it to the Server

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If the location updates then only cause of the RepMovement from the Pawn itself

#

But it's way cheaper to turn off the movement replication of the pawn for the time being

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And attach it on everyone

pallid mesa Jul 23, 2019, 2:08 PM

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okay I'm going to move the attach to the onrep itself

thin stratus Jul 23, 2019, 2:10 PM

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That's just some optimization, not sure if it fixes anything

high current Jul 23, 2019, 2:10 PM

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same this goes for @somber glade , your attach doesnt seem to be replicated, and therefore will only happen on the server

thin stratus Jul 23, 2019, 2:10 PM

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Don't have much time looking at the code

somber glade Jul 23, 2019, 2:11 PM

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Ahha. I wasn't sure if the server would be authoritative there.. does an attach only need to run on clients or does it need to run on the server too?

pallid mesa Jul 23, 2019, 2:11 PM

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@winged badger attach seems to not be replicated

ocean geyser Jul 23, 2019, 2:11 PM

#

question, what do you guys generally check for in your validate functions? for example im looking at my add/subtract health functions and cannot really think of anything to check for. its simple 0-100 health and its only running on the server, any ideas?

somber glade Jul 23, 2019, 2:11 PM

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like would a multicast attach fix that?

thin stratus Jul 23, 2019, 2:11 PM

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@pallid mesa At least as far as I'm aware, I always attach via OnReps

#

Turn off Replication of Movement and see for yourself

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Can you explain me why you need this stuff to execute more than once (OnRep of Active)?

#

Everything you do on % 2 == 0 should only happen if possessed

#

So why not a boolean?

pallid mesa Jul 23, 2019, 2:13 PM

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I did have a boolean but if for some reason it was false-false

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the new comer to the netcull volume

#

wouldn't get the memo, but shouldn't matter

#

it could be a boolean un theory

#

but the outcome is the same

high current Jul 23, 2019, 2:14 PM

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@somber glade yeah, or do it via a repnotify like exi is suggesting

pallid mesa Jul 23, 2019, 2:15 PM

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I didn't check the C++ code of attach myself because I was told it was replicated

thin stratus Jul 23, 2019, 2:15 PM

#

Also, you say in your video "OnThe Server"

somber glade Jul 23, 2019, 2:15 PM

#

So basically rep notify the guard tool variable and have that attach it?

thin stratus Jul 23, 2019, 2:15 PM

#

While you are showing 2 clients

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@pallid mesa

pallid mesa Jul 23, 2019, 2:15 PM

#

thats not the server

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I know

#

xD

#

I know I know

#

xD

#

That theory is clear

#

gucci on simulated proxies

#

miss behaving on the owning client

#

👌

worthy perch Jul 23, 2019, 2:16 PM

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MyReplicatedActor->AttachToComponent(GetSomeLocation(), FAttachmentTransformRules(EAttachmentRule::SnapToTarget, true));

This is only set on the server and this seems to replicate down for me.
And MyReplicatedActor has ReplicateMovement = False.

thin stratus Jul 23, 2019, 2:16 PM

#

Still moving looks like you want to also flush input and clear the last input vector

high current Jul 23, 2019, 2:16 PM

#

@thin stratus just curious, if the component and the parent are replicated themselves, would the attach be too?

#

probably no right?

pallid mesa Jul 23, 2019, 2:16 PM

#

but I don't have control over the cmc

thin stratus Jul 23, 2019, 2:16 PM

#

@high current The main idea is that attaching just updates the location based on the parent iirc

#

And that has nothing to do with multiplayer

#

If you attach on the Server and you replicate the Movement

#

it will look like it's replicated (the attach)

#

But if you attach it on a non-movement replicated actor

#

you should see the server moving the attached actor and the client not

high current Jul 23, 2019, 2:17 PM

#

aight, ty

thin stratus Jul 23, 2019, 2:18 PM

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@pallid mesa Why not?

#

https://i.imgur.com/97E4dCg.png

Imgur

#

That clears the input

pallid mesa Jul 23, 2019, 2:18 PM

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nono what I mean is that

#

XD

#

I can't move the character

#

when that happens