#multiplayer | Unreal Source | Page 385

floral ingot Apr 8, 2018, 5:32 AM

#

from what i understand the character movement includes all the movement smoothing etc

frank copper Apr 8, 2018, 5:33 AM

#

you need to make sure that static mesh you're trying to use

#

has collision generated

#

if it has, make sure it uses the appropiate collision channel

#

if so, make sure it generates hit result

floral ingot Apr 8, 2018, 5:34 AM

#

did that before, and it was all set up. but ill give it another crack

frank copper Apr 8, 2018, 5:34 AM

#

better

floral ingot Apr 8, 2018, 5:34 AM

#

thanks for the help mate, really appreciate it 😃

frank copper Apr 8, 2018, 5:34 AM

#

no problem

severe widget Apr 8, 2018, 5:50 AM

#

so with CMC (or any movement component) you'll only ever get sweep overlaps and hits from the root component. One way to get around this, though taxing, is to have your desired component sweep from its last location to its current location and accept hit events or w/e a frame late.

#

But who knows maybe that'll end up as bad as just using floating pawn movement

slim holly Apr 8, 2018, 7:23 AM

#

excuse my morning slow, but if controllers are not present on clients, how is control rotation replicated?

#

never used it myself

severe widget Apr 8, 2018, 7:31 AM

#

controllers are on the server, and then on their owning client.

#

You have your controller, and so does the server, but nobody else

slim holly Apr 8, 2018, 7:32 AM

#

but if controllers are not present on clients

#

I kinda implied that already

severe widget Apr 8, 2018, 7:32 AM

#

Well nvm then

#

sorry I didn't fully parse

slim holly Apr 8, 2018, 7:32 AM

#

answerhub only gives me multicast option

#

which I'm not fond of

thin stratus Apr 8, 2018, 7:39 AM

#

The thing is, it's not replicated

#

:P

slim holly Apr 8, 2018, 7:39 AM

#

it isn't?

#

that's dumb

thin stratus Apr 8, 2018, 7:39 AM

#

No, let's say you have spring arm

#

And you but a mesh on it

#

ANd place it in front of the character (so rotate it 180)

#

And you set it to control rotation

#

You'll only see yaw

#

cause the Actor moves

#

But Pitch (and roll) won't change.

#

Well at least as far as I tested a while ago

#

Only the local client and server can access it

slim holly Apr 8, 2018, 7:40 AM

#

oh so it is replicated to server at least

#

ok guess I can live with that

#

trying to find an elegant solution to handle LookAt rotation when jumping between multiple pawns

#

without doing a bunch of casting

thin stratus Apr 8, 2018, 7:47 AM

#

I think it's replicated to it, yeah

#

Maybe not as "GetController->GetControllRotation" or so

#

But there was something that had the rotation

#

However better just test it

#

Might also be worth trying to set the component in question to replicate

slim holly Apr 8, 2018, 7:52 AM

#

I don't trust component replication tho

grand kestrel Apr 8, 2018, 7:57 AM

#

Casting isn't so bad, even on tick, it's a drop in the ocean compared to other things a game needs.. if even that

slim holly Apr 8, 2018, 7:57 AM

#

not concerned about the performance, but it creates a reference jungle

grand kestrel Apr 8, 2018, 8:00 AM

#

Ah

thin stratus Apr 8, 2018, 8:05 AM

#

Even if itÄs a drop in the ocean

#

If you work on a bigger game

#

You'll want to work clean and proper

#

Otherwise you'll see yourself going back to that tick and removing the cast anyway

slim holly Apr 8, 2018, 8:06 AM

#

and if you go even further, you start thinking "should I save this value to local variable" if it gets used multiple times inside function

thin stratus Apr 8, 2018, 8:07 AM

#

I did hear that LocalVariables in Blueprints aren't that good though

#

Cause the pin is already a local variable

#

That's why you can query it by now

#

I mean, if you have a variable in the function

#

That you want to save and reuse in it

#

Then yeah

#

But the Pins not really

#

I did do that too before they allowed us to use the pins directly as variables

slim holly Apr 8, 2018, 8:08 AM

#

wait, so it actually creates variable now from the return value?

thin stratus Apr 8, 2018, 9:30 AM

#

The Inputs

#

On functions

#

You can just Get them

#

Inside the function

#

No need to use them from the input node

#

or save them extra

slim holly Apr 8, 2018, 9:50 AM

#

oh, good to know

worn hill Apr 8, 2018, 2:12 PM

#

@slim holly pure casts help clean up cast jungles https://i.imgur.com/GaNbnLZ.png

Imgur

slim holly Apr 8, 2018, 2:12 PM

#

no I mean

#

if you cast, you lock down the classes

worn hill Apr 8, 2018, 2:13 PM

#

gotcha

slim holly Apr 8, 2018, 2:13 PM

#

it's just extra work if you have to do changes in the future

worn hill Apr 8, 2018, 2:13 PM

#

when u said jungle i was thinking bp spaghetti

#

That makes sense.

slim holly Apr 8, 2018, 2:14 PM

#

kinda, just in the context of blueprint communication

worn hill Apr 8, 2018, 2:16 PM

#

my bad. Overlooked yer "reference" qualifier

indigo root Apr 8, 2018, 4:27 PM

#

How do I handle replicating a widget attached to an actor? I have a healthbar widget attached to player actors, however they don't show up for people who joined before the player

#

I tried marking "component replicates"

thin stratus Apr 8, 2018, 4:56 PM

#

You can't replicated Widgets

#

You replicate the Data they use

#

Would need a bit more information to know what you are exactly trying there

bleak cloud Apr 8, 2018, 5:03 PM

#

Can anyone give me some high level guidance on how to implement groups for matchmaking? My aim is something similar to Rocket Leagues or PUBGs lobby. It's simple enough to have a single player search for a session and join it, and when there are enough players you travel to map and start game. What if I want to make it so players can join a party together? Would they join a session together, then when they go to find a game, it would search for session that fits them all and moves them into there? That seems like it would be a bit clunky, and has a few issues. I'm not quite sure how to handle it otherwise though.

thin stratus Apr 8, 2018, 5:09 PM

#

Given you are using a Subsystem that supports it (Like Steam)

#

You'd use Beacons for the Party

#

They are basically Sessions without maps

#

That still allow you to replicate States

#

Implementing them obviously needs c++ and isn't that easy

bleak cloud Apr 8, 2018, 5:10 PM

#

How have I not seen anything on beacons yet? Thank you very much

thin stratus Apr 8, 2018, 5:10 PM

#

I got a question too: How literal should one take the already existing GameStates?

#

I want to give the first and lonely player to join the match some warmup time.

#

Now I could do bDelayedStart == true which holds the MatchState in "WaitingToStartMatch" until a second player joins

#

However I'm not sure if it's okay to actually handle any game logic during WaitingToStartMatch

#

GameModes, by default, just spawn you as a Spectator during that time.

#

ShooterGame simply adds a Countdown of 15 seconds before they call StartMatch

#

Also leaving you in a Spectator Pawn

#

I just want a warumup round in which you can technically play, but nothing really happens.
As soon as the second player spawns, it will restart the round by calling StartMatch.

#

The other idea is to call StartMatch directly and just handle the WarmUp inside of it

#

:/

#

Open to suggestions

bleak cloud Apr 8, 2018, 5:13 PM

#

I don't really know enough about UE4 to feel confident in answering, but... Does UE4 allow you to assign them to anything other than spectator during that state?

thin stratus Apr 8, 2018, 5:14 PM

#

I could spawn a Pawn for them manually at that point

#

Which would get rid of the Spectator

#

I actually don't want them to be a spectator at that point anyway

bleak cloud Apr 8, 2018, 5:16 PM

#

Does UE4 handle anything specifically during that state? I'm guessing it's just waiting for players to complete travel or connection, right?

#

If thats all, I don't see any harm in modifying that state to use it what you want it for

thin stratus Apr 8, 2018, 5:16 PM

#

Right now I also don't see harm. Just wondering before I do anything bad

bleak cloud Apr 8, 2018, 5:17 PM

#

I'm afraid I lack the experience and knowledge to give a better answer 😦

thin stratus Apr 8, 2018, 5:17 PM

#

No biggie, was asking in general :P not just you. Thanks for helping!

#

extern ENGINE_API const FName WaitingToStart;        // Actors are ticking, but the match has not yet started
extern ENGINE_API const FName InProgress;            // Normal gameplay is occurring. Specific games will have their own state machine inside this state

#

I might just follow this comment

#

And do create my own States once I'm in InProgress

#

Tough thing

#

Seems like UT has warmup

#

Oh lord..

bleak cloud Apr 8, 2018, 5:23 PM

#

Is the source for UT available?

thin stratus Apr 8, 2018, 5:23 PM

#

Yes

bleak cloud Apr 8, 2018, 5:24 PM

#

Which path did they go down?

thin stratus Apr 8, 2018, 5:24 PM

#

Looking through it now

#

Quite massive

#

Okay they do it in WaitingToStart

#

Cause they reset variables in StartMatch

#

gg

bleak cloud Apr 8, 2018, 5:25 PM

#

Nice. Good to know

thin stratus Apr 8, 2018, 5:26 PM

#

if (bForceWarmup && UTPC && PS && UTGameState && (UTGameState->GetMatchState() == MatchState::WaitingToStart))
{
        PS->bIsWarmingUp = true;
        PS->ForceNetUpdate();
        UTPC->ClientUpdateWarmup(PS->bIsWarmingUp);
        RestartPlayer(UTPC);
}

#

That happens in PostLogin

#

Here, in case you ever need to look into it: https://github.com/EpicGames/UnrealTournament

halcyon abyss Apr 8, 2018, 5:42 PM

#

Is there a way to activate and deactivate the Project Settings option "Skip assigning gamepad to Player 1" at run-time?

#

So I can have player 1 join as keyboard or gamepad player

indigo root Apr 8, 2018, 6:20 PM

#

@thin stratus yes the widgets can be reproduced from some simple data - it's a healthbar above a player's head containing health, maximum health and name

thin stratus Apr 8, 2018, 6:53 PM

#

Yeah and what the issue now?

#

It's above the Player, so it's a WidgetComp on the Character

#

So you def have a ref to it runtime

#

Even if someone joins late

#

So I guess your way of getting the data is not correct

#

You'd need to show some code to get a better idea of the issue

hidden thorn Apr 8, 2018, 7:12 PM

#

Is this how RepNotify works?

// This is an actor placed in the level
//.h
public:
    UPROPERTY(EditAnywhere, BlueprintReadWrite, ReplicatedUsing = OnRep_bOpenDoor)
    bool bDoorOpen;

    UFUNCTION()
    void OnRep_bOpenDoor();

    void OpenDoor();
    
//.cpp
void ADoor::OpenDoor()
{
    UE_LOG(LogTemp, Warning, TEXT("Open Door"));
    bDoorOpen = true;
}

void ADoor::OnRep_bOpenDoor()
{
    if (bDoorOpen == true)
    {
        UE_LOG(LogTemp, Display, TEXT("OnRep_OpenDoor - ADoor"));
    }
}

//.cpp Part of the player character
// I shoot a raycast from the players camera position and pass the actor that I hit to this method
void URPGPlayerInteraction::ActorInteraction(AActor* HitActor)
{
    UE_LOG(LogTemp, Display, TEXT("NPCInteraction - RPGPlayerInteraction"));
    
    if (HitActor != nullptr)
    {
        if (Cast<ADoor>(ActorHit) != nullptr)
            Cast<ADoor>(HitActor)->OpenDoor();
    }
}

thin stratus Apr 8, 2018, 7:16 PM

#

Yes and no

#

The RepNotify calls when the Variable arrives at the clients

#

In C++, the Server does NOT call OnRep, so you have to do that manually for him

#

So that part is fine I'd say

#

But your linetrace is not, cause you need to do that on the Server

#

You could pass the Hit Actor to the Server directly, but hten any client can just pass any actor, even if not hit

#

So you'd want to perform the line trace already on the server

hidden thorn Apr 8, 2018, 7:22 PM

#

Can I not shot the line tracer get the actor hit and pass it to the method, and then call Cast<ADoor>(HitActor)->OpenDoor(); inside a Server RPC which has a HitActor parameter?

#

rather than perform the line trace on the server?

thin stratus Apr 8, 2018, 7:24 PM

#

You can but take into account that this allows cheating by the client

#

He can call OpenDoor without even being need it then

hidden thorn Apr 8, 2018, 7:29 PM

#

I see, well I will get it working like this for now and then change it

indigo root Apr 8, 2018, 7:33 PM

#

@thin stratus the widget component of the character doesn't get replicated, that's the problem...

#

do I need to create it manually on each player's side when they join?

hidden thorn Apr 8, 2018, 7:36 PM

#

What you should do is have the widget on the character but hidden, when it needs to be visible set it and then update the data.

hidden thorn Apr 8, 2018, 7:57 PM

#

@thin stratus do I need to put bool bDoorOpen; into GetLifetimeReplicatedProps

indigo root Apr 8, 2018, 8:06 PM

#

well it does not exist on the other clients @hidden thorn

loud mountain Apr 8, 2018, 8:07 PM

#

Probably already answered but you need to put bDoorOpen into GetLifetimeReplicatedProps, yeah.

thin stratus Apr 8, 2018, 8:25 PM

#

@SuperCuber#7818 How is your setup then? Cause then you are not using a 3D Widget

hidden thorn Apr 8, 2018, 8:27 PM

#

@indigo root Inside your character create the widget and simply untick Visibility and on other clients simply call a Server RPC asking for it to be turned on or do whatever you want with it.

hidden thorn Apr 8, 2018, 8:42 PM

#

Is it possible to assign multiple methods to a RepNotify variable?

loud mountain Apr 8, 2018, 8:45 PM

#

couldnt you just call another method inside the repnotify method?

hidden thorn Apr 8, 2018, 8:48 PM

#

I am not saying there aren't work arounds but I was just curious

#

what I did was use the variable since it's a bool

#

and I did if(bool is true) ... else ....

#

which does what I need

past bear Apr 9, 2018, 8:36 AM

#

morning folks, I could do with a little assistance brainstorming why a simple integer on the player character might not be replicating

#

the int itself is Replicated, and is changed via UI

#

the UI calls the appropriate custom event on the client

#

which 'executes on all' and is reliable

#

now the event should be unnecessary, because the int is already replicated

#

but I'm a bit miffed

#

I can't seem to get the value to actually replicate xD

loud mountain Apr 9, 2018, 8:41 AM

#

do you use RepNotify?

#

you need to call your change event on server

#

not on "all"

#

because replications only work from Server to Client but not vice versa

#

you could theoretically create an RPC wich changes your int to the value you specified

#

then have your changed event called on "all" inside the server RPC

#

that'll probably what you want.

past bear Apr 9, 2018, 8:44 AM

#

it has to come from client

#

and it's not repnotify, no

#

but yeah, I'll try RPCing it instead

lean river Apr 9, 2018, 8:45 AM

#

You saying you try to change int from ui ?

past bear Apr 9, 2018, 8:47 AM

#

initially it was directly, but instead it now goes through an event in the character itself

lean river Apr 9, 2018, 8:47 AM

#

And now you change int on server right with rpc right? :)

past bear Apr 9, 2018, 8:48 AM

#

that's the idea

#

and it's working

#

it was multicast before, now it's 'on server' only

#

thanks folks ^^

indigo root Apr 9, 2018, 10:21 AM

#

@thin stratus I am attaching it to a Paper Character like this https://owo.whats-th.is/43ee0a.png

thin stratus Apr 9, 2018, 10:24 AM

#

Then it also exists on everyone

#

Then something else in your code is wrong

indigo root Apr 9, 2018, 1:00 PM

#

hm strange

proper olive Apr 9, 2018, 1:29 PM

#

hey peeps - I'm clearing out warnings/errors in my project so far... and I'm down to the LAST ONE!!! But pretty sure I read somewhere that this is inconsequential for the Editor right, because Steam doesn't actually work in the editor?

#

LogOnline: Warning: STEAM: Steam API disabled!

#

in full it's:

#

LogOnline: Display: STEAM: Loading Steam SDK 1.39
LogOnline: Warning: STEAM: Steam API disabled!
LogOnline: Display: STEAM: OnlineSubsystemSteam::Shutdown()

bitter oriole Apr 9, 2018, 1:32 PM

#

Yeah, Online is fully disabled while in editor

#

So you're correct, this is expected

proper olive Apr 9, 2018, 1:35 PM

#

thanks!

#

mighty happy with my properly replicated day/night system! 😄

#

📎 unknown.png

#

still some work to do (need to match sun and moon sizes for example) but sooooo rewarding to chill on this mountain with myself and my other self and watch the moon together 😂

slate veldt Apr 9, 2018, 2:31 PM

#

Hey all, anyone seen this before?

LogNetPlayerMovement: Warning: CreateSavedMove: Hit limit of 96 saved moves (timing out or very bad ping?)

bitter oriole Apr 9, 2018, 2:32 PM

#

Sounds like what the log says, bad networking and your local player has too much moves stored

slate veldt Apr 9, 2018, 2:32 PM

#

Getting odd behaviour where client side is moving just fine, but all movements are dialled down about 100 fold on the server and therefore the rest of the clients. It appears that the saved moves aren't being combined properly or cleared, so this list is exceeding the limit and therefore the full movement data isn't being pushed up to the server?

#

Yeah, I understand its what it says on the tin

winged badger Apr 9, 2018, 2:33 PM

#

searching for the log's text inside the CMC should shead some light on it

#

you can see what code triggers it

bitter oriole Apr 9, 2018, 2:33 PM

#

96 frames means 1.5s, so it's a pretty huge lag here

#

What's that part about 100 times slower ?

winged badger Apr 9, 2018, 2:34 PM

#

also, all ServerMove functions are unreliable

#

so if you overdid it with your reliable RPCs...

#

then you should re-evaluate them (is this more important then the ServerMove?)

slate veldt Apr 9, 2018, 2:36 PM

#

Ah that could be the issue, thanks Zlo, I'll re-evaluate the reliable functions - bit odd that ServerMove functions are set to unreliable

bitter oriole Apr 9, 2018, 2:36 PM

#

That's fairly normal

#

Movement can't expect to be reliable

slate veldt Apr 9, 2018, 2:37 PM

#

The 100 times slower part isn't exact, but when the client moves, say they move about 20 meters on their side, on the client side the server only moves them about 1m

bitter oriole Apr 9, 2018, 2:37 PM

#

You're going to have dropped packets at some point, and movement packets will always be obsolete by the time they are re-sent by the client (that's what"reliable" means)

#

Setting inputs to reliable only makes sense for stuff like abilities, door opening stuff

winged badger Apr 9, 2018, 2:38 PM

#

critical gameplay

bitter oriole Apr 9, 2018, 2:40 PM

#

More like, "still important to receive even five seconds too late"

slate veldt Apr 9, 2018, 2:49 PM

#

On the face of it, I don't think I have a heck of a lot of reliable functions, especially not ones that would fire every frame to cause the lag. Is there an easy way to show networked functions? All my logic is C++ so could easily ctrl+F through all the headers, but it would be interesting to see a breakdown of what's happening on the networking every frame

bitter oriole Apr 9, 2018, 2:52 PM

#

Well, start by measuring the lag itself, I'd be surprise if there isn't a stat net command or something like that

slate veldt Apr 9, 2018, 2:52 PM

#

Yeah there is a stat net command, almost might do a netprofile

#

Ping 23, out rate ~4000 bytes, in rate ~5200bytes

#

doesn't seem like a lot at all

#

Interesting one, I've just noticed that the p.VisualizeMovement on other clients is showing them as having no acceleration or velocity

bitter oriole Apr 9, 2018, 3:16 PM

#

Have you customized the movement component a lot ?

#

You can check in ShooterGame if you're using it the same way

#

Chances are you missed something on that front

slate veldt Apr 9, 2018, 3:27 PM

#

Yeah, don't worry, I think I've just found the missing piece - I am overriding the movement component with custom overrides. There are 2 pawns the player controls, so this particular character doesn't have a controller assigned, in other cases I've done an override where we replace the Controller references with Linked Pawn Controller, which has worked well, but missed one controller getter in ServerMove_Implementation, so need to override that and replace the controller reference, I notice in there that it needs PC otherwise it sets InAccel to ZeroVector

wary willow Apr 9, 2018, 3:52 PM

#

Yo, can someone confirm that Standalone Game Multiplayer is broken in 4.19?

wary willow Apr 9, 2018, 4:11 PM

#

Seems like it's from Single Process

tight sorrel Apr 9, 2018, 4:44 PM

#

Hello everyone , i have issue with pawn movement i am using rolling template with subsystem multiplayer. i have some lag or delay with client movement in his play view and it's annoying i couldn't fix it. and these pictures describe how to this work:

#

📎 MoveRight.png

#

📎 MoveForward.png

#

can any one help!!!

thin stratus Apr 9, 2018, 5:08 PM

#

Without the CharacterMovementComponent you have 0 Interpolation etc.

#

You are basically just setting location

#

Well here it's torgue

#

But same problem

#

You have to code some interpolation etc.

pallid mesa Apr 9, 2018, 5:18 PM

#

if you only know how to program in blueprints, the only way to execute some code on the clients as soon as a location and/or rotation changed is using an on-rep notify

#

so you can trigger on the simulated proxies some interpolation code in every location change

#

here you have some hints @tight sorrel https://answers.unrealengine.com/questions/479211/what-is-the-best-way-to-smooth-player-movement-for.html

proper olive Apr 9, 2018, 6:02 PM

#

@pallid mesa that's actually a super helpful explanation, I think I totally understand how network interpretation in blueprints can be done... got a similar approach to handling prediction with blueprint?

pallid mesa Apr 9, 2018, 6:05 PM

#

anything by hand, reading the CMC can take you a good chunk of time since the class (not including header) is around 10K lines, but I think it could help you to understand how prediction can be done, and probably by understanding that and knowing how BP's work you will then know how to probably do some prediction using BP's

proper olive Apr 9, 2018, 6:07 PM

#

reading it in C? I guess... 😂

#

or is it done out in bp?

shut gyro Apr 9, 2018, 6:14 PM

#

Hey has anyone ever tested using beacons on the Playstation/Oculus or any other subsystems besides Steam? Are they even supported on them?
Also, would anyone have any ideas about how to handle making a loading screen between levels that is loaded asynchronously and doesn't block the main thread? Does this require the need for persistent levels?

thin stratus Apr 9, 2018, 6:31 PM

#

Beacons, as far as I understand them, are something UE4 Internal

#

Steam only register the Session and provides it to connect to

#

As long as your Subsystem can handle Creating and Finding sessions, it should work

#

@shut gyro

sharp pagoda Apr 9, 2018, 6:33 PM

#

Beacons are subsystem independent, they are just internetwork UDP packet broadcasts. It will work on any system (in theory) that supports BSD networking

slate veldt Apr 9, 2018, 7:57 PM

#

Interesting issue, our character (slightly modded character movement component) is moving around just fine on both server and clients, however, occasionally, when I run into the edge of a piece of geometry, the serverside will clip passed/off the edge and continue forward, where as the player client will run up against the object. The server and client will still perform the same movements, but are now in different world locations

#

This is PIE testing though so don't know if it will behave differently in standalone/builds

#

Typical, I can't reproduce what happened now I've mentioned it on here

#

Normally glancing off of fairly circular collision shapes, just been able to reproduce it

tight sorrel Apr 9, 2018, 8:39 PM

#

thx guys for help

misty stirrup Apr 9, 2018, 9:30 PM

#

Does anyone know if pubg is implementing their own networking solution? Like how are they updating 100 players on one map?

grand kestrel Apr 9, 2018, 10:03 PM

#

Pubg is the worst example out there. It's fully client authoritative and server doesn't need to do much processing

#

The devs don't know what they're doing

stiff finch Apr 9, 2018, 10:06 PM

#

Hey guys, i'm diving into the replay system (https://docs.unrealengine.com/en-us/Engine/Replay), just a quick question to anyone who is familiar with it .

If i have a replay file and i play it on the dedicated server - will it automatically play for every connected client (so, will actors state be replicated to everyone)? Or do i have to make any changes for it to work properly?

I want it so multiple clients can watch the same "replay" at the same time, while being connected to each other.

high heart Apr 10, 2018, 2:38 AM

#

@stiff finch just a warning if you're at the beginning of your dive, the replay system has some pretty major issues in 4.18. I was unable to get it working based on the tutorials due to some issue with the replay net driver, and the only information i was able to find was that it's just borked

#

Also had some critical issues with my character that made them not move in replays. gave up on it

#

obviously it's possible. just maybe not as well supported as the documentation says

#

I think the default behavior is to just play it locally though. so you may need to hack in a server travel somewhere to make it play for everybody. there's only one way to find out

#

but again, it's not a super smooth process. Now that I'm thinking about it the issue I was having is that you can't start a replay from UMG because in that scenario it dumps the DemoNetDriver during travel for some reason. There's a pull request out there that fixes it but you will need a custom engine build to make it stop doing that. IIRC using the console command works fine

#

On another note, I've got a bandwidth/architecture question. I recently moved a lot of my heavy server RPC's to an Enum based scheme to cut down on bandwidth. This gets pretty good performance (8 bits per RPC rather than hundreds) but I'm now wondering if it would be even more efficient to just use dedicated server calls for each value of the enum, cutting it down to 0 bits. Is there any reason not to do this?

#

The inner workings of an RPC are pretty foreign to me. Does it just send a function pointer over a socket? If so how big is it? 64 bits? Variable bits?

#

Also is there a more efficient way to send an actor reference to server? In VR the latency from 64 bits when picking something up is pretty noticeable, and I don't want to rely on the server to detect hand collisions

floral ingot Apr 10, 2018, 3:28 AM

#

How would you handle a simple respawn system for a multiplayer game? I'm destroying the players character after they've taken enough damage to kill them, and disabling the input after that happens. Would I find all the actors for the spawn points, pick a random one then create a new character for them, renable input and spawn it on the random point?

#

Would it be best to do that in game mode, or the local character/server?

high heart Apr 10, 2018, 3:29 AM

#

@floral ingot you'll probably want to do that in game mode, the shootergame sample has a decent implementation. you're going to want to be smarter than "random" though

floral ingot Apr 10, 2018, 3:29 AM

#

ah ill implement something better, just trying to get my head around how to do it for now

high heart Apr 10, 2018, 3:30 AM

#

in shootergame (which I believe uses the default engine functions) there is a ChoosePlayerStart function and a CanSpawnAtPlayerStart (or something like that). The idea is that you get all the legal spawns and then choose the best one

#

those functions are in game mode

#

As far as smarter selection goes, I used halo 3 as a rough guide of a "good" system, you can read about it here: http://halo.bungie.org/misc/fyrewulff_spawnsystem/

floral ingot Apr 10, 2018, 3:32 AM

#

what an awesome article thanks!

thin stratus Apr 10, 2018, 6:48 AM

#

stiff finch Apr 10, 2018, 8:44 AM

#

Thank you for the warning @high heart, i'm ok with changing the engine (although would like to avoid it), i hope i'll find this pull request when needed 😃 For now i guess i'll make a simple multiplayer replay demo and see if it works.

high heart Apr 10, 2018, 8:55 AM

#

i'll see if i can pull it up, might be in my browser history or something

#

@stiff finch here is the relevant answerhub issue (https://answers.unrealengine.com/questions/709068/demonetdriverreplay-stuck.html) and here is the fix (https://github.com/EpicGames/UnrealEngine/pull/3375)

cinder hearth Apr 10, 2018, 9:11 AM

#

Hello guys ! I need your help for a basic Voice chat system using Opus codec

#

Do you already use it ? It's for a Client and i have no idea on how to use it. I need to make it works for Win / Mac :S

stiff finch Apr 10, 2018, 9:13 AM

#

@high heart perfect, thanks!

verbal wave Apr 10, 2018, 10:05 AM

#

holy shit you can actually spawn replicated actor directly from actor with ROLE_AutonomousProxy without calling a server RPC

#

did they change it recently? I've been adding abundant RPC for months

#

this.. makes so much sense

west rapids Apr 10, 2018, 10:35 AM

#

U mean u can spawn as Client? @verbal wave

west rapids Apr 10, 2018, 5:48 PM

#

Ok after many different setups I've concluded that AddInputVector and AddMovement on the pawn/pawn movement component respectively don't want to work on a server. Really need to add that to the tooltip.

thin stratus Apr 10, 2018, 5:53 PM

#

It does or not?

#

I'm half sure it states that PawnMovementComponent, without any additional steps, won't replicate

#

Ah well it says something else

#

* Add movement input along the given world direction vector (usually normalized) scaled by 'ScaleValue'. If ScaleValue < 0, movement will be in the opposite direction.
* Base Pawn classes won't automatically apply movement, it's up to the user to do so in a Tick event. Subclasses such as Character and DefaultPawn automatically handle this input and move.

sweet spire Apr 10, 2018, 6:02 PM

#

no it wont

#

you need to go and look at DefaultPawn.h and .cpp

#

There is quite a few things u need to do to get it to work

west rapids Apr 10, 2018, 7:10 PM

#

Well, these things work locally out of the box when it comes to translating an actor, what's weird is that an RPC doesn't even move the pawn on the server.

#

neither input vector or addmovement actually move the pawn on the server, when ran on the server. however they move just fine local.

pallid mesa Apr 10, 2018, 7:45 PM

#

when you replicate a component it replicated to all other players

#

gona try to drop an example

#

woth this same principle @raven holly

#

dang too many things on a single screen on my computer XD

raven holly Apr 10, 2018, 7:49 PM

#

😄

pallid mesa Apr 10, 2018, 7:56 PM

#

Okay... sorry but gyazo is trolling me and I cannot make the gifs I would like to... -_-

#

welp basically if you have a varaible replicated

#

and you change that variable

#

let's say a health integer variable

#

if the component is not replicated, the variable will change only on the server and not in the client

#

📎 unknown.png

#

in this case, the health component is replicated

#

and the health regen comp isn't

raven holly Apr 10, 2018, 8:03 PM

#

hm

pallid mesa Apr 10, 2018, 8:04 PM

#

so basically the component that replicates is the one handling the HP

#

the other one just throws some events and timers

#

to heal yourself over time

#

you don't need any replicated variable if it won't change on the runtime

#

📎 unknown.png

#

this would be on the bp character

📎 unknown.png

#

notice that the rpc is on the HealthRegen event and not in the Health event

#

this matters

#

@raven holly got it?

#

sorry long delays I'm fixing a repo XD

raven holly Apr 10, 2018, 8:26 PM

#

ahh i see

pallid mesa Apr 10, 2018, 8:28 PM

#

the health regen component isn't replicated

hard mountain Apr 10, 2018, 8:49 PM

#

Hi guys, a question. How should I make a local multiplayer with VR included? I've got the vr, just I want to make a prototype when you are 3 vs 1, three players plays on split screen, meanwhile the other one with the vive. Which is the problem? The problem is in the desktop should appear ONLY the first team screens, so the HTC Vive's screen won't be displayed on desktop or TV. Is it possible? How?
It's a party game

sweet spire Apr 10, 2018, 9:07 PM

#

Thats a very broad question

#

thats sorta like

#

"how do i make a sure film about X?"

icy nacelle Apr 10, 2018, 9:29 PM

#

About to attempt to turn my 'Attach Equipment' Function into one that works over multiplayer. I was thinking of collapsing this half of the code into a function that runs on server. Please check out my comments and let me know if I'm going along the right track. Starting to feel like I understand multiplayer well, I just dont have 100% confidence in myself just yet 😃
edit: Solved.

📎 Untitled.png

#

To add - the function works perfectly without currently being replicated.

hard mountain Apr 10, 2018, 9:39 PM

#

@sweet spire What do you want to know more?

sweet spire Apr 10, 2018, 9:40 PM

#

ur asking alot but to kinda answer ur question

#

u would need seperate clients

#

that not not supported by default

#

and u would prob cause a fuck storm trying to intergrate it

#

FGameplayTag::RequestGameplayTag(TEXT("Equipment.Base.Energy.HERE")
need convert a number to FName and insert it at "HERE" whats the best way to do it?

winged badger Apr 10, 2018, 9:44 PM

#

to string, concat, back to fname, i think

icy nacelle Apr 10, 2018, 9:44 PM

#

^ Answering my question above. Yes, it did work, although I didnt follow my comments exactly. Less 'outputting' and more - casting back to the player to set those variables.

sweet spire Apr 10, 2018, 9:47 PM

#

Could u mind knocking me a small example out Zlo

#

would u*

winged badger Apr 10, 2018, 9:49 PM

#

without intellisense, that would be interesting

#

but sure i'll give it a go

#

FName(fnameVariable.ToString() + Int32::ToString(myint));

sweet spire Apr 10, 2018, 9:49 PM

#

So iv got an FName and i basically need to create this

TEXT("FName.Int32"))))

#

with the .

#

ahhh i see

winged badger Apr 10, 2018, 9:50 PM

#

then + "." also

sweet spire Apr 10, 2018, 9:50 PM

#

That makes sense

#

i think lmao

#

lemi give it ago

winged badger Apr 10, 2018, 9:51 PM

#

might be FromString for int

#

i never know how to manipulate strings off the top of my head, no matter how many times i've done it 😄

sweet spire Apr 10, 2018, 9:56 PM

#

dam there is no examples on the wiki xD

#

📎 unknown.png

#

why is there nothing on the wiki for this D:

#

wait

#

can u do the text thing

#

u can do for logs

#

for other things

#

TEXT("MyCharacter's Health is %d"), MyCharacter->Health

#

like that?

bleak cloud Apr 10, 2018, 10:02 PM

#

In the context of firing a projectile from a weapon in blueprints. Player clicks a button - Check that they actually can fire the weapon - spawn the projectile. Obviously I want the checks that they can fire and spawning of the projectile to happen on the server. To do that, I need to run it through the PlayerController, which is the go between between the client and server, correct? In that case, should I have the input event in the PlayerController and have it call an event set to run on server, that then calls the checks and spawning in the weapon blueprint? Or does that code need to actually be in the player controller?

sweet spire Apr 10, 2018, 10:05 PM

#

FGameplayTag::RequestGameplayTag(TEXT("%s.%d"), false, TagName.ToString(), Index)))

#

dam i tried to cheat it

#

like this

#

lmfao

#

no success

winged badger Apr 10, 2018, 10:06 PM

#

you need to dereference a string inside TEXT macro

#

also, not the right channel for this

sweet spire Apr 10, 2018, 10:07 PM

#

oh shit wtf lmso

#

i thought i was in cpp

icy nacelle Apr 10, 2018, 10:13 PM

#

Do BPIs run on all clients?

#

I made a system MONTHS ago, which uses an BPI, and it seems like its called on everyone 🤔

winged badger Apr 10, 2018, 10:15 PM

#

BPI would be what?

icy nacelle Apr 10, 2018, 10:17 PM

#

Blueprint Interface

#

sorry

winged badger Apr 10, 2018, 10:17 PM

#

it runs on server if invoked from server, it runs of client if invoked on client

icy nacelle Apr 10, 2018, 10:18 PM

#

Ah okay

#

Essentially, I've got something replicating in my game that I dont want to be replicating

#

and since I made it a few months ago when I knew nothing about unreal and followed some tutorial... I have no idea what I did 😆

#

Ah, I figured out my problem

#

So essentially I have a problem with this stuff replicating for when I dont want it to. When a player walks over an item, it highlights (Using Set Render Custom Depth)
I, for obvious reasons, do not want it to replicate to all clients. The "highlight" is being set with a function on the base class of my items.
Any idea how to use set the render depth so it only appears for a single client?

winged badger Apr 10, 2018, 10:57 PM

#

you get the overlapping player

#

check if its a locally controlled pawn

#

and set the render depth only if it is, locally

icy nacelle Apr 10, 2018, 11:00 PM

#

Hmmm

#

I've had a deep look at it, and I've tried changing various things to make it run on client, but every time it seems to change for everyone.

#

It uses multiple functions, like checking for which object is closer when overlapping two actors

#

Your suggestion seemed to work

#

but it also knocked out all the functionality of the items too, like picking up objects / opening UI. I'll look a bit deeper into this and see what I can come up with

#

Thanks for your help Zlo ❤

hidden thorn Apr 10, 2018, 11:39 PM

#

So on the server Server_ChangeMovement is printed in the output log once when I press W and once when I release it.

But if I do the same on the client there are times when it is called 2-3 times and same when i release it.
This is based on the output log, I have Use Single Process set to true in this case so the FPS remains the same on both the server and client.

There is some code removed from Server_ChangeMovement because it's unrelated to this matter as all I am doing in there is setting some variables.

void ARPGPlayer::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
{
    ...
    PlayerInputComponent->BindAxis("Walking", this, &ARPGPlayer::Walking);
}

void ARPGPlayer::Walking(float Value)
{
    if (Value != 0.0f)
    {
        if (Max_Current_Speed != Walk_Speed * Value)
            Server_ChangeMovement("Walking", Value);

        AddMovementInput(GetActorForwardVector(), Value);
    }
    else
    {
        if (Max_Current_Speed != Idle_Speed)
            Server_ChangeMovement("Idle", Value);
    }
}

void ARPGPlayer::Server_ChangeMovement_Implementation(const FString& State, float Value)
{
    UE_LOG(LogTemp, Warning, TEXT("Server_ChangeMovement"));

    if (State == "Walking")
    {
        Max_Current_Speed = Walk_Speed * Value;
    }
    else if (State == "Idle")
    {
        Max_Current_Speed_Strafing = Idle_Speed;
    }
}

#

I tried to launch 2 instances where the server had around 20fps and the client had 120+, in that case Server_ChangeMovement was called 27 times both pressed and release in an instant.

#

If I hold down W for a few seconds it comes up about 4 times and when I release it 10 times.

lost inlet Apr 11, 2018, 12:33 AM

#

sending a state as a string rather than an enum value?

hidden thorn Apr 11, 2018, 12:41 AM

#

I do have an enum for that as well but idk why I wasnt just using the enum, I guess I will change it :)

#

Thanks for pointing that out

sonic frigate Apr 11, 2018, 1:01 AM

#

Hey,
I have a very strange issue
I m working on multipalyer game ( steam integration) after packiging(shipping build ) other player cannot find servers ( Steam access is working )
i have added steam_appid.txt with 480, but cannot find servers..
-I set up find session max results to 20000- but still not work
(LAN can find session ,but when i join just got Fatal error)

I would appreciate any help.. im getting to crazy .. )
Cheers!

kind bay Apr 11, 2018, 2:25 AM

#

I believe the 480 steam id restricts finding sessions to players of the same region. You and your players will have to all be on the same download region on steam as the server to find the session @sonic frigate

sonic frigate Apr 11, 2018, 3:09 AM

#

@kind bay yes, that is same. so i really dont have any ideas :\

heavy marlin Apr 11, 2018, 4:08 AM

#

welcome to using steam in unreal

floral ingot Apr 11, 2018, 4:42 AM

#

Is SetActorRotation() not replicated by default? I can rotate my pawn, and want to reset its position after its been destroyed and respawned, SetLocation() works fine, but the rotation will always remain at its previous rotation

#

SetActorTransform() will set the location correctly, but setting rotation to 0,0,0 still keeps the previous rotation of the pawn

floral ingot Apr 11, 2018, 5:57 AM

#

^ managed to fix it using setcontrolrotation on the controller instead of the actor

vivid siren Apr 11, 2018, 6:36 AM

#

hey does anyone here have experience with player states / game states / game instances?

fossil spoke Apr 11, 2018, 6:48 AM

#

Ask your question and find out 😉

vivid siren Apr 11, 2018, 6:51 AM

#

lol, well basically im trying to get my custom player states to persist through level changes with multiple players

severe widget Apr 11, 2018, 6:52 AM

#

sorry I've only got experience in gamemode :(

vivid siren Apr 11, 2018, 6:52 AM

#

ive learned that the game state automatically keeps track of a list of all player states in a handle little array called PlayerArray

#

so i'm trying to store that PlayerArray in the GameInstance before switching levels

severe widget Apr 11, 2018, 6:53 AM

#

C++ by chance?

vivid siren Apr 11, 2018, 6:53 AM

#

unfortunately some variables in the player states get reset on the new level

#

noo strictly blueprints, sorry 😛

severe widget Apr 11, 2018, 6:53 AM

#

Well I dunno if you can do what I'm about to suggest then

#

Ok

#

In your custom player state, override an event called Receive Copy Properties

#

That event will pass you a reference to another PS.

#

What you do is, set that other PS's variables to the current PS's values.

#

eg

#

📎 unknown.png

#

Now, here's the cool part.

#

Don't even do anything with the playerarray

#

On seamless travel, the PlayerState is copied over, and this function is used to keep the state across the transition.

vivid siren Apr 11, 2018, 6:57 AM

#

oh really? i have seamless travel set up as well, i heard it was recommended

severe widget Apr 11, 2018, 6:57 AM

#

yup

vivid siren Apr 11, 2018, 6:58 AM

#

also i dont see the option to override the event

#

i see this though

#

📎 unknown.png

severe widget Apr 11, 2018, 6:58 AM

#

Oh. Sure.

#

That's it

vivid siren Apr 11, 2018, 6:58 AM

#

theres also this

#

📎 unknown.png

severe widget Apr 11, 2018, 6:58 AM

#

📎 unknown.png

#

Ok

#

So

#

OverrideWith is for reconnects

#

its the opposite of CopyProperties

#

You should implement both.

#

they don't get called at the same time, don't worry

vivid siren Apr 11, 2018, 7:00 AM

#

alright, awesome 😄

#

does this look right to you?

📎 unknown.png

severe widget Apr 11, 2018, 7:01 AM

#

other way around

#

for that one

vivid siren Apr 11, 2018, 7:01 AM

#

oh, my bad

severe widget Apr 11, 2018, 7:01 AM

#

that's the right way for OverrideWith

vivid siren Apr 11, 2018, 7:02 AM

#

📎 unknown.png

#

and so, the player states on new levels should be updated to what they were on the previous level?

#

the Current_Class, that is

severe widget Apr 11, 2018, 7:06 AM

#

Yeah

#

Try it?

vivid siren Apr 11, 2018, 7:07 AM

#

oh my gosh

#

yes

#

it carried over!

#

thank you so much, and you said you only knew gamemode, ahaha you saved me

ember needle Apr 11, 2018, 7:43 AM

#

i’d recommend reading cedric_eXi network compendium you would have found this solution in the first pages.

glad sedge Apr 11, 2018, 11:05 AM

#

odd q - any web guys here?

hard mountain Apr 11, 2018, 11:38 AM

#

Ok, I've found what I previolsy meant: https://www.youtube.com/watch?v=LWea5VMyyVo

YouTube

Jamie Telford

Asymmetrical gaming.. VR and 3rd Person!

Test build of student project in Unreal Engine.. Asymmetric Multi User!

▶ Play video

#

is there a guide about?

indigo root Apr 11, 2018, 11:46 AM

#

"where is it?" lol

thorn merlin Apr 11, 2018, 11:47 AM

#

https://www.youtube.com/watch?v=s7Aokpe2HmM can I be a total newb and ask how you set a different server tick rate in unreal? does this mean u set custom actor tick rate on dedicated server vs our client actors?

YouTube

Battle(non)sense

Fortnite 3.4 Increased The Server Tickrate?

The Unreal Engine (which powers both Fortnite and PUBG) really struggles under the load generated by 100 players, which results in a server tickrate of just ...

▶ Play video

#

i mean i know how to adjust tick rates - this is more of a technique question - do most games do this, for each actor depending if its client/server they tweak the tick rate?

hard mountain Apr 11, 2018, 11:55 AM

#

@indigo root about creating an asymmetrical prototype

#

VR vs PC desktop

#

The question of yesterday

thin stratus Apr 11, 2018, 12:22 PM

#

@thorn merlin Kinda sure, yes. As Client Tick is kinda depending on Frames

#

You want a steady tickrate on the Server to be sure that everything more or less remains deterministic

#

At least that's what I think :D

slate veldt Apr 11, 2018, 12:36 PM

#

For some reason, I have a Multicast function (called on server) that only executes on server an not on clients? Any idea what could be wrong? The actor is replicating

#

It's declared UFUNCTION(NetMulticast, Reliable)

#

Ahh... it appears it is being called when used later, but in the instance where it isn't it's called very early in gameplay, so perhaps it's not replicated quite yet on client side to even consider the multicast

hollow bridge Apr 11, 2018, 12:44 PM

#

This might be a silly question, I've made a project that allows you to connect to a 3rd party dedicated server and match with other users, but because of the nature of how i setup my game states any of ue4's multiple-player options create a server - client relationship that causes all instances to be unusable except the server.

Is there a way, short of using cmd or opening multiple projects to run 2, essentially, offline instances of a project? It would make things a lot easier for me but maybe the answer is changing how my game states are setup in the first place.

slate veldt Apr 11, 2018, 12:47 PM

#

You could try right clicking the uproject and clicking launch game twice?

hollow bridge Apr 11, 2018, 12:48 PM

#

yeah, that works. so does running something akin to

C:\Program Files\Epic Games\UE_4.17\Engine\Binaries\Win64\UE4Editor.exe "%FULLPATHTOPROJECT%\ProjectName.uproject" -game -PIEVIACONSOLE -ResX=1280 -ResY=720 -Multiprocess -messaging -SessionName="Play in Standalone Game" -windowed GameUserSettingsINI="%FULLPATHTOPROJECT%\Saved\Config\Windows\PIEGameUserSettings0.ini" -MultiprocessSaveConfig -MultiprocessOSS WinX=-1912 WinY=31 SAVEWINPOS=1

#

but i wish there were an in editor way of doing the same thing

indigo root Apr 11, 2018, 1:41 PM

#

@Bipolar#5114 did you mention the wrong person?

#

@hard mountain

thorn merlin Apr 11, 2018, 1:54 PM

#

seems like this is set in NetServerMaxTickRate

hollow bridge Apr 11, 2018, 3:20 PM

#

my soultion in the time being is to write a batch file to run cmd to open multiple game clients.

meager spade Apr 11, 2018, 3:25 PM

#

need a bit of help with some logic, i have a wave spawner, which spawns the ai in, what would be the sanest way to detect if there are no AI left in the level before starting next wave?

icy nacelle Apr 11, 2018, 3:56 PM

#

@meager spade If the waves are being destroyed after, you could use GetAllActorsOfClass?

#

if the length of the outputted array == 0, start new wave?

#

I have a slight problem with my train spawner. Whenever it runs, its spawning actors into the server and moves them, however, the clients see the trains in their original start positions AND also the moving trains. Trying to figure out why the original trains are still there..

#

When I run it as a single player game, the trains do not appear in their first positions permanently

#

Also, the bugged out trains have no collision. I assume I need to update the player about the trains movements? But surely I'm doing this already as clients can see the train moving. Could someone please explain where I'm going wrong with my replication?

dire temple Apr 11, 2018, 4:58 PM

#

Does anyone here use SQL database for their game currently? I do, and I need to ask some questions for support if you would be so kind, thank you!

supple aurora Apr 11, 2018, 6:17 PM

#

Hey ya'll is there a good repository for the multiplayer info provided here? just starting out on C++ after getting Blueprint nice and comfy and I want to focus on multiplayer

icy nacelle Apr 11, 2018, 6:24 PM

#

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

supple aurora Apr 11, 2018, 6:26 PM

#

Thanks @icy nacelle

icy nacelle Apr 11, 2018, 6:26 PM

#

No worries, enjoy 😉

#

Still looking for a solution to my above question ^

toxic meteor Apr 11, 2018, 6:37 PM

#

Is anyone familiar with creating a dedicated server using Steam OSS? I cant figure out how/why I can't join mine.

📎 069a52780cc8446d51d3cc46e0aab742.png

#

📎 d80e6df4236d7b51d13266a4cd0cab89.png

#

It also shows up in the steam servers so I believe its port forwarded correctly.

📎 55fb7d173d300119b1a9aab7281b921c.png

icy nacelle Apr 11, 2018, 6:38 PM

#

Can you not join because the player limit is 0?

#

(havent used steam dedicated servers yet, just an observation)

toxic meteor Apr 11, 2018, 6:40 PM

#

I'll test that right now; I followed a few tutorials on how to do it and they said to put it as that, but maybe.

winged badger Apr 11, 2018, 6:45 PM

#

i am somewhat confused as to what a widget is doing on a dedicated server

toxic meteor Apr 11, 2018, 6:46 PM

#

its not

#

the branch checks to see if its the sever or the client

#

if its the client, then the main menu opens

#

else start dedicated

#

Also, I just tested increasing the public & private connections which didn't seem to change anything

icy nacelle Apr 11, 2018, 7:21 PM

#

Quick question... For server driven events to replicate properly, do I need to do a run on server?

#

Aka, the particle system on my train is not functioning correctly. The train is handled by the level.

toxic meteor Apr 11, 2018, 7:22 PM

#

Whats the replication set to?

icy nacelle Apr 11, 2018, 7:22 PM

#

The replication on what?

toxic meteor Apr 11, 2018, 7:22 PM

#

your particle system

icy nacelle Apr 11, 2018, 7:22 PM

#

The particle system is a component of the train actor

#

....Which can be set to replicate.

#

Dam, I cant believe I didnt think of replicating that. DUH! thanks bud

thorny kelp Apr 11, 2018, 7:23 PM

#

and how does it behave on clients?

toxic meteor Apr 11, 2018, 7:24 PM

#

np 😃

icy nacelle Apr 11, 2018, 7:24 PM

#

Just tested and that doesnt seem to have fixed it

#

(It works correctly when playing in singleplayer)

toxic meteor Apr 11, 2018, 7:24 PM

#

Are you testing with a dedicated server or just multiple clients?

thorny kelp Apr 11, 2018, 7:24 PM

#

do you programmatically set it to active somewhere?

icy nacelle Apr 11, 2018, 7:24 PM

#

Owning actor is set to replicate

#

I'm testing it on a dedicated server yeah

#

No Joe, its all on the one actor BP

thorny kelp Apr 11, 2018, 7:25 PM

#

Strange if you're not changing its state on server, then it shouldn't differ on clients

icy nacelle Apr 11, 2018, 7:26 PM

#

Ah, I see whats happening

#

Since this is a 'breaking sparks' particle, I first deactivate it on begin play for that actor. When I call for the train to break, I enable the sparks again. Somehow, enabling this does not replicate.

thorny kelp Apr 11, 2018, 7:26 PM

#

Is shouldn't

#

you can create RepNotify boolean variable SparksAllOverThePlace

#

and then apply it in notify_sparks... SetActive

icy nacelle Apr 11, 2018, 7:31 PM

#

I see

#

Thanks, I'll give it a go 😃

thorny kelp Apr 11, 2018, 7:33 PM

#

As I remember RepNotify acts as property, so it should also work in singleplayer

icy nacelle Apr 11, 2018, 7:33 PM

#

Got it, thanks friend! I'm still new to rep-notify so I'm getting it slowly

thorny kelp Apr 11, 2018, 7:34 PM

#

could you check this?

#

np

icy nacelle Apr 11, 2018, 7:42 PM

#

I've actually got another issue @thorny kelp, Do you think you could look into it for me and see where I'm going wrong?

When I run my game as dedicated, the train spawns at the start of the track, and just sits there. When I play it on single player, it doesn't do this.
Also want to mention, the train moves in a very stuttery way when its played on multiplayer. Any ideas how I can improve it to be smoother?

#

Should I change the update frequency to help make it smoother?

thorny kelp Apr 11, 2018, 7:43 PM

#

Well, maybe

#

but no

#

I would rather implement interpolation in tick

#

and lower update rate

#

Can this train hit you?

icy nacelle Apr 11, 2018, 7:44 PM

#

Yeah I want it to be able to kill players

#

Havent got round to programming that bit yet, but I know how I'd do it.

thorny kelp Apr 11, 2018, 7:46 PM

#

How do you move you train?

#

AddForce? By spline?

#

@icy nacelle

icy nacelle Apr 11, 2018, 7:47 PM

#

By spline

#

📎 Untitled.png

thorny kelp Apr 11, 2018, 7:49 PM

#

Disable Replicate Movement by now

icy nacelle Apr 11, 2018, 7:50 PM

#

Really?

thorny kelp Apr 11, 2018, 7:50 PM

#

Train should move on both client and server but not synced

icy nacelle Apr 11, 2018, 7:50 PM

#

Its still juttery though

thorny kelp Apr 11, 2018, 7:51 PM

#

strange, should be perfectly smooth on both

icy nacelle Apr 11, 2018, 7:51 PM

#

Hmmm

thorny kelp Apr 11, 2018, 7:51 PM

#

looks like its still replicates movement somewhere

icy nacelle Apr 11, 2018, 7:51 PM

#

Should I turn off replication for the actual skeletal mesh too?

#

Yeah thats what I'm thinking

thorny kelp Apr 11, 2018, 7:52 PM

#

No replication should be on

#

else it wont send events at all

slate veldt Apr 11, 2018, 7:53 PM

#

Any VR devs out there had issues where the client's motion controllers components are not tracking their hands? We've confirmed that being listen server host is fine, but on both machines being client means that the hands do not track

thorny kelp Apr 11, 2018, 7:53 PM

#

We had that issue too

slate veldt Apr 11, 2018, 7:53 PM

#

This is on Oculus

thorny kelp Apr 11, 2018, 7:54 PM

#

@slate veldt

slate veldt Apr 11, 2018, 7:54 PM

#

@thorny kelp oh really? Any idea what the issue was/what the fix was?

thorny kelp Apr 11, 2018, 7:54 PM

#

we ended up writing our own replication for motion controllers

#

😄

slate veldt Apr 11, 2018, 7:54 PM

#

Ah fun fun fun haha

#

There must be a better solution

thin stratus Apr 11, 2018, 7:54 PM

#

Replication for MotionControllers never worked properly

#

You have to send the location and rotation to the Server and replicate it by hand

thorny kelp Apr 11, 2018, 7:55 PM

#

oh wait, there was a good free VR plugin that does it right

#

gimme a sec

slate veldt Apr 11, 2018, 7:55 PM

#

That's fair, would the client view any lag when doing it this way? obviously we would want it to be as smooth as possible on there end?

#

Currently the client just see's their hands on the ground

thorny kelp Apr 11, 2018, 7:56 PM

#

@slate veldt

#

https://forums.unrealengine.com/development-discussion/vr-ar-development/89050-vr-expansion-plugin

VR Expansion Plugin - Unreal Engine Forums

VR Expansion Plugin

Updated: 04/10/2018

10/10/2016 - No longer OpenVR specific, if platform does not support OpenVR the plugin no longer compiles out the

#

I guess

#

Not sure tho

slate veldt Apr 11, 2018, 7:56 PM

#

Cheers, I'll take a look

icy nacelle Apr 11, 2018, 7:57 PM

#

@thorny kelp I searched it up on google and someone said this works well for moving objects? Thoughts?
https://answers.unrealengine.com/questions/38798/how-to-use-delta-time.html

thorny kelp Apr 11, 2018, 7:58 PM

#

@icy nacelle This is a different thing

icy nacelle Apr 11, 2018, 7:58 PM

#

ah

thorny kelp Apr 11, 2018, 7:59 PM

#

what it says that you should multiply your movement speed by delta time to remove difference caused by framerate

#

it does apply to everything in game, not only to multiplayer

icy nacelle Apr 11, 2018, 8:00 PM

#

ah

#

So thats not what we're looking for?

thorny kelp Apr 11, 2018, 8:00 PM

#

yup

#

when you run it in singleplayer, does it lag?

icy nacelle Apr 11, 2018, 8:02 PM

#

Nope

#

It runs really smooth

thorny kelp Apr 11, 2018, 8:02 PM

#

Check Replicate Movement again

#

in every component of that actor

#

I mean set it to OFF

icy nacelle Apr 11, 2018, 8:03 PM

#

📎 Untitled.png

#

If I set replication off to the skeletal mesh, it doesnt replicate

thorny kelp Apr 11, 2018, 8:04 PM

#

Replicate Movement and Replicates is a different thing

icy nacelle Apr 11, 2018, 8:04 PM

#

Hm?

#

oooh

#

oh.

#

oh god.

thorny kelp Apr 11, 2018, 8:04 PM

#

Keep Replicates on

icy nacelle Apr 11, 2018, 8:05 PM

#

Yep, still stuttery

thorny kelp Apr 11, 2018, 8:05 PM

#

Let's go into PM

icy nacelle Apr 11, 2018, 8:05 PM

#

Sure.

eternal anchor Apr 11, 2018, 8:11 PM

#

okkk… I call server RPC from client on component owned by PlayerController..

#

and it never reaches server

#

but properties on component are replicated correctly

#

any ideas ?

summer gazelle Apr 11, 2018, 8:54 PM

#

Using advanced sessions, what are the public and private connections options? https://gyazo.com/ee431bc93df75ba36b075a514f7f1dd9

Gyazo

toxic meteor Apr 11, 2018, 9:08 PM

#

@summer gazelle The public & private connections are the number of players allowed on a server, so if you change the public connections to 100, in the server list the player count will be 0/100

summer gazelle Apr 11, 2018, 9:09 PM

#

Is public the same as private?

#

Or is private connections the LAN connections?

weary trout Apr 11, 2018, 10:01 PM

#

?

toxic meteor Apr 11, 2018, 10:09 PM

#

I believe private connections is lan @summer gazelle That being said, I'm not 100% sure.

vital steeple Apr 11, 2018, 11:06 PM

#

anyone noticed that multicasts not executing properly (only execute on server) on begin play sometimes? ive noticed taht reliable multicasts dont always seem to run

#

if i put a small delay on it, it works fine

#

if i dont, it only executes on the server

wary willow Apr 11, 2018, 11:10 PM

#

you don't need multicase on BeginPlay though

vital steeple Apr 11, 2018, 11:10 PM

#

is there a way to monitor network saturation in ue4

wary willow Apr 11, 2018, 11:10 PM

#

Multi

#

Since BeginPlay is like a Multi 😃

vital steeple Apr 11, 2018, 11:11 PM

#

normally yeah

#

its a child of a parent BP that has an authority switch, the server does a bunch of stuff, then sets a boolean. after setting the boolean, depending on the status of it, it calls "on" or "off"

#

then based on the server side event, it multicasts soem stuff (a widget text change and some other FX stuff0

#

so you are correct, normally i wouldnt have to

wary willow Apr 11, 2018, 11:14 PM

#

hm

#

You said it sets something

vital steeple Apr 11, 2018, 11:14 PM

#

and i actually even have a client side event... taht runs off an on-rep var of that boolean

wary willow Apr 11, 2018, 11:14 PM

#

Why not just do a RepNotify then?

vital steeple Apr 11, 2018, 11:14 PM

#

😃

#

i actually have that and i can use it

#

this is just simpler, script-wise

#

and it was more out of curiosity if you guys have seen that

#

and know how to mo nitor network data in ue4, to see if my suspicions were confirmed

#

seems odd that the server would need to wait ~1 second before correctly executing a multicast

#

(even if its reliable)

wary willow Apr 11, 2018, 11:20 PM

#

What do you mean by "monitor network data" @vital steeple ?

vital steeple Apr 11, 2018, 11:20 PM

#

also, on-rep only triggers if the value is changed, not if its set to the same status it was before

#

i think...

#

itd be nice if there was a way to monitor how much data the server is sending to clients, get an idea for how much is too much, know why unreliable replicated events arent sending etc

#

like half-life 1 had the old net_graph 1 stuff

jolly siren Apr 11, 2018, 11:50 PM

#

Anyone else having issues with open 127.0.0.1 in 4.19?

#

Have been debugging quitters, late joiners, etc. with open MainMenu and open 127.0.0.1 since the dawn of time.

#

But now open 127.0.0.1 isn't doing anything

wary willow Apr 11, 2018, 11:57 PM

#

bunch of issues in 4.19 @jolly siren

#

I wouldn't doubt that's messed up as well

#

Almost regretting my update from 4.18 which I thought was poop as well

jolly siren Apr 11, 2018, 11:58 PM

#

I'm actually having a good experience with 4.19 as a whole.

#

Going to compare my editor prefs and report back if I find something.

dire temple Apr 12, 2018, 12:06 AM

#

4.19 has won my heart so far, fixed 3 massive game hemmoraging errors of 4.19

#

of 4.18*

bleak cloud Apr 12, 2018, 1:03 AM

#

If I'm spawning a projectile, is it not enough for the event to be run on server? Does it have to go through player controller?

sharp spire Apr 12, 2018, 2:15 AM

#

does anybody know how replicating movement works in a topdown game?

vital steeple Apr 12, 2018, 2:31 AM

#

@bleak cloud you either run it from something with an owning connection or directly on the server itself

#

@sharp spire thats a really open ended question 😦 canyou be more specific?

#

@bleak cloud if there is a possessed pawn, you should be able to run it from that. you dont have to run it from the controller (but you can)

#

you can actually check the output log for errors in running replicated events. it will let you know if you are running it from something that doesnt have an owning connection

sharp spire Apr 12, 2018, 2:52 AM

#

@vital steeple how can i replicate clicking to move? it seems the SimpleMoveTo is definitely not replicated by default

#

im new to replication, and maybe shedding some light on this situation could put it together foir me

bleak cloud Apr 12, 2018, 2:55 AM

#

@vital steeple So if I have a possessed character pawn, and that has an attached weapon pawn, I currently have the input event in the character, which calls an event on the weapon which spawns the projectile. The event is set to run on server. The server is able to shoot, but the clients aren't.

sharp spire Apr 12, 2018, 2:55 AM

#

https://gyazo.com/75a2e00f333f240003c7ff070a786134

Gyazo

#

https://gyazo.com/2205df16d95db77e96a08b726d5addef

Gyazo

#

tried this and it works for the most part, except rotations. was this done correctly though?

#

https://gyazo.com/391a9eff2f146e75858407850a529c0b

Gyazo

#

https://gyazo.com/5d5ce608b68632c952cbe9e29539b5b0

Gyazo

#

Where’s Cedric when you need him 😃

thin stratus Apr 12, 2018, 6:52 AM

#

At that hour, sleeping :x

kind bay Apr 12, 2018, 7:01 AM

#

I am currently working on an item/inventory system. My items themselves don't ever get rendered, nor do they need to be placed in the scene. Are actors my only option if I need them to be replicated for multiplayer? I originally had them set as an object which worked fine on the server, but obviously didn't get replicated on client

thin stratus Apr 12, 2018, 7:01 AM

#

No and yes.

#

You can use UObjects

#

But they aren't replicated by default. However you can use Subobject Replication on an Actor to replicate the UObjects

kind bay Apr 12, 2018, 7:03 AM

#

I am assuming UObjects are only available in C++ and not exposed to blueprints?

thin stratus Apr 12, 2018, 7:03 AM

#

UObjects are also in BP, but the replication part is not

#

Do your Items need to execute any code

#

So do they need to have functions

#

(Also, it's not wrong to use an actor. You can spawn thousands of empty actors without having problems)

kind bay Apr 12, 2018, 7:04 AM

#

Yeah I would like them to

thin stratus Apr 12, 2018, 7:04 AM

#

Then you are probably forced to use AActor

#

Otherwise I would have said use a Struct

kind bay Apr 12, 2018, 7:07 AM

#

Yeah I think AActor might be what I need to do. Is there any issues with just leaving all these empty (data and function only) actors at 0,0,0 actor location?

thin stratus Apr 12, 2018, 7:37 AM

#

Hm if you make them relevant for owner

#

And set the owner properly, I guess not

#

Otherwise can't hurt to just attach it to the player? idk

kind bay Apr 12, 2018, 7:49 AM

#

Thanks man, I’ll see how I go

thin stratus Apr 12, 2018, 8:29 AM

#

Why would UT replicate the RemainingTime ONLY if Time % 10 == 9

#

Why exactly the 9, 19, 29, 39 times?

#

Why not 0 :x

#

That code could use comments -.-

pallid mesa Apr 12, 2018, 8:57 AM

#

Thats weird, but thats a way to correct everyones clock before going into a 0 num XD

thin stratus Apr 12, 2018, 9:05 AM

#

Fair enough

high heart Apr 12, 2018, 9:13 AM

#

what's the best entry point to receive gamestate on a client? It's extremely important for my game that clients have current gamestate when the UI is initialized. My current system sort of works but is extremely spaghett and unreliable

#

basically i just ended up doing a procedure on tick that checks if it's there, which is obviously extremely stupid

winged badger Apr 12, 2018, 9:15 AM

#

if you're using GameStateBase as a base

#

by the time client's anything does BeginPlay, GameState is already there

#

(it replicates MatchState, and after it does client calls BeginPlay)

high heart Apr 12, 2018, 9:17 AM

#

oh, so if i just do it in an actor's beginplay it should be good?

#

say, the controller?

winged badger Apr 12, 2018, 9:18 AM

#

yeah, it should work

high heart Apr 12, 2018, 9:19 AM

#

interesting. i must be fucking everything up by putting logic in the widget constructor and/or constructing the widget on match start events

winged badger Apr 12, 2018, 9:19 AM

#

BeginPlay goes right after ReadyToStart

high heart Apr 12, 2018, 9:20 AM

#

hmm, thanks for the info

full bane Apr 12, 2018, 9:28 AM

#

Hey, what is the proper way to use the navsystem to move a character in a networked game?

#

Pretty much all the functions use the controller, and no remote client can simulate the behaviour this way

slate veldt Apr 12, 2018, 9:40 AM

#

Hey all, does anyone know how to run a camera fade on client? When I call PCM on client and start camera fade, it sets the clients PCM settings, but the server is the one who updates. Do I have to call it all on the server instead?

#

Then it gets replicated down?

keen wind Apr 12, 2018, 10:07 AM

#

hmm, about the GameStateBase replication on clients: I often had the issue that BeginPlay is executed on clients before "GetGameState" returns a valid reference (so setting a GameState variable in BeginPlay wasn't possible for me without a Delay). I think after investigating a bit online a while ago I came to the conclusion that GameState isn't reliably already replicated when BeginPlay is executed on clients (on any actor) - am I wrong?

#

I mean, at least if I try it now it seems to work O_o

winged badger Apr 12, 2018, 10:35 AM

#

GameStatebase replicates MatchState

#

and when its ReadyToStart, then BeginPlay happens on clients

#

if you were to forget Super::GetLifetimeReplicatedProper(OutReplicatedProps); in custom GameStateBase, clients would never call BeginPlay

keen wind Apr 12, 2018, 11:17 AM

#

oh well, you are right. Why it didn't work before is a mystery to me though (I was using a blueprint subclass of GameStateBase, and didn't do anything extraordinary). But that's just one of many mysteries so I guess it's fine 😉

slate veldt Apr 12, 2018, 12:56 PM

#

Hey all, does anyone know how start camera fade works networking wise?

jolly siren Apr 12, 2018, 1:00 PM

#

It looks like 4.19 wasn't the culprit for breaking open 127.0.0.1. It was broken in at least 4.18 too. It worked in 4.16 and previous. So I've opened a bug.

sharp spire Apr 12, 2018, 1:08 PM

#

Hey good morning @thin stratus we must be on opposite time zones.. does that look like it was setup right?

sharp spire Apr 12, 2018, 3:31 PM

#

Apologies, but is anyone available to tell me if I wrote my top down player movement replication correctly?

#

📎 image.jpg

#

📎 image.jpg

thin stratus Apr 12, 2018, 3:43 PM

#

Is that called on Tick?

#

@sharp spire

sharp spire Apr 12, 2018, 4:16 PM

#

It’s called on event Touch1

#

Oh the enter pin? It’s using the default topdown template script. I believe it is on event tick

thin stratus Apr 12, 2018, 4:35 PM

#

Then don't mark the rpc reliable

sharp spire Apr 12, 2018, 4:45 PM

#

Thank you very much 😃

#

Event tick gives priority as is?

#

Also did location need to be promoted to a variable and set to replicate to this process to work? Or could I have just sent the hit result straight to the server

#

For this process to work*

untold sun Apr 12, 2018, 5:54 PM

#

In my level blueprint why can I call getGameMode if the GameMode only exists on the server?

#

what resources do you guys use to actually learn networking in UE4? I have big troubles to understand in detail how it work.

high heart Apr 12, 2018, 5:58 PM

#

@untold sun I found this to be tremendously helpful when I was learning https://gafferongames.com/post/introduction_to_networked_physics/

#

it's not ue4 specific but it goes into extreme detail about how it works. the next step is to realize that unreal already has all of that stuff implemented for you

#

all that being said I'm still struggling a year later. it's a whole lot easier of course, but it's not exactly simple

untold sun Apr 12, 2018, 6:00 PM

#

I know the details that I can read in the documentation and in the networking compendium from eXi. But still - even after intensive researching 3-4 I found days I still do not have a replicated cube 😃

high heart Apr 12, 2018, 6:00 PM

#

ouch

#

what exactly are you trying to do?

untold sun Apr 12, 2018, 6:01 PM

#

replicated a cube as a first step... I can not find a tutorial about it, no simple project to download and nothing else. I have a test project ready for testing, but it does not work.

#

one try to be more specific, one moment

#

I

thin stratus Apr 12, 2018, 6:02 PM

#

@rancid idol#8582 Event tick calls every frame. Reliable would make sure that EACH of these RPCs arrives

#

You are flooding with that and would block others things from replicating

#

And that's the wrong Pierce

#

Why not

#

Thanks Discord

#

@rancid idol#8582

#

Welp

#

Sorry, buddy!

untold sun Apr 12, 2018, 6:06 PM

#

I have a simple project in which I call methods on GameMode from the level blueprint - this projec so far works. But I wonder why that is possible as the GameMode exists only on the server.

#

This is big point of confusion for me

thin stratus Apr 12, 2018, 6:06 PM

#

You can call "GetGameMode" everywhere

#

But if it's the client side that calls it, it will return null

#

Also, what's the problem of replicating a cube?

rancid idol Apr 12, 2018, 6:09 PM

#

Woah @sharp spire We have the same name

thin stratus Apr 12, 2018, 6:09 PM

#

:D Yeah sorry

#

The ID should handle that but well

untold sun Apr 12, 2018, 6:09 PM

#

I try the following "callstack": level blueprint -> playercontroller -> getGameMode... so the problem is probably that it is null as you said.

rancid idol Apr 12, 2018, 6:09 PM

#

Im a different pierce

untold sun Apr 12, 2018, 6:10 PM

#

because of that the cast fails

thin stratus Apr 12, 2018, 6:10 PM

#

LevelBlueprint, depending on what you do in there, calls on all instances

#

So on the Server, and on all Clients

rancid idol Apr 12, 2018, 6:10 PM

#

cedric you mentioned me but you were ment to mention the other one

thin stratus Apr 12, 2018, 6:10 PM

#

The Server call can properly get the GameMode

#

The Clients can't

#

@rancid idol Correct

#

It's Discord

#

When I paste his name + ID, it tags you

rancid idol Apr 12, 2018, 6:10 PM

#

xD

thin stratus Apr 12, 2018, 6:11 PM

#

📎 unknown.png

rancid idol Apr 12, 2018, 6:11 PM

#

No dont write his name if you type @ Pierce it should come up with two different options

thin stratus Apr 12, 2018, 6:11 PM

#

@sharp spire

#

Yeah well I did that already

#

Now it pings him properly

#

Idk what that is

rancid idol Apr 12, 2018, 6:12 PM

#

xD

thin stratus Apr 12, 2018, 6:12 PM

#

Anyway, sorry for the ping!

untold sun Apr 12, 2018, 6:13 PM

#

what I want to do: keyboard event ---> <gameplay framework stuff> ---> have the server replicated a cube to all clients. do you know - very highlevel - what should happen in <gameplay framework stuff> ?

thin stratus Apr 12, 2018, 6:14 PM

#

Can you tell me what "Replicate Cube" is in your language?

#

Spawn it?

untold sun Apr 12, 2018, 6:14 PM

#

yes, spawn it

thin stratus Apr 12, 2018, 6:15 PM

#

Alright here are some infos:

Actors that are marked as "Replicate" will spawn on Clients if spawned by the Server
To move from Client to Server (so you can spawn), you need a ServerRPC
To have ServerRPCs working, you need to call them in a Client Owner Actor, e.g. PlayerController. PlayerCharacter, PlayerState, or something that you set the Client as Owner on

untold sun Apr 12, 2018, 6:16 PM

#

I will try that, thanks cedric!

thin stratus Apr 12, 2018, 6:17 PM

#

So for you that is:

Press Key -> Have that Key as Event in your PlayerController -> Check with "Switch Has Authority" if you are a CLient or a Server -> ...

... -> On Authority, Spawn the Cube
... -> On Remove, call the ServerRPC -> In the ServerRPC, Spawn the Cube

untold sun Apr 12, 2018, 6:19 PM

#

puhh.... finally...... thank you so much!!!!

#

😃

#

not sure if it works but finally I have an outline to try!!!

thin stratus Apr 12, 2018, 6:22 PM

#

Make sure your Cube Blueprint is marked as Replicate

jolly siren Apr 12, 2018, 6:29 PM

#

bRequiresPushToTalk is defined in the gamesession section of Game.ini. Does this mean push to talk isn't configurable per player?

#

I guess I could call StartTalking at the beginning of the match for each client if they have a custom push to talk config set to false. And have the bRequiresPushToTalk set to true.

thin stratus Apr 12, 2018, 6:32 PM

#

Asked myself the same

#

Didn't find an answer

#

Might be worth looking into UT for that too

#

Or just ShooterGame

#

I would have thought that you can set that to True/False and if False you have voice activation

jolly siren Apr 12, 2018, 6:34 PM

#

I think shootergame just requires push to talk. It isn't configurable.

#

I'll check UT

#

yeah they essentially do what I proposed

#

Custom bPushToTalk property. Set bRequiresPushToTalk to true. And call StartTalking in ClientEnableNetworkVoice

#

easy enough 👌

sharp spire Apr 12, 2018, 6:56 PM

#

Thank you so much @thin stratus you’ve shined quite a lot of light on multiplayer for me 😃 so basically the entirety of multiplayer is based on that style of replication and rpc?

thin stratus Apr 12, 2018, 6:56 PM

#

Correct

#

And Ownership

#

Can't forget about that

sharp spire Apr 12, 2018, 6:57 PM

#

Ownership helps handle what controller is giving input from the client technically, right?

thin stratus Apr 12, 2018, 6:57 PM

#

Ownership is who owns the Actor

#

Based on a NetConnection

sharp spire Apr 12, 2018, 6:57 PM

#

Ownership is just a matter of passing it on when things are spawned, right?

thin stratus Apr 12, 2018, 6:57 PM

#

You can't do Server or Client RPC if no Client is owning the Actor

sharp spire Apr 12, 2018, 6:57 PM

#

Got it

thin stratus Apr 12, 2018, 6:58 PM

#

Yeah, most actors are taken care of already

sharp spire Apr 12, 2018, 6:58 PM

#

That makes sense, because it doesn’t know who’s calling it. Right?

#

The instigator is basically ownership right?

thin stratus Apr 12, 2018, 6:58 PM

#

but when you spawn you can pass a PlayerController of a user as Owner (or something else that he is already owning)

#

No, Owner is Ownership

sharp spire Apr 12, 2018, 6:58 PM

#

Oh haha

#

What’s instigator?

#

They’re both exposed on spawning actors

thin stratus Apr 12, 2018, 6:58 PM

#

The overall "thing" that instigated the spawn

#

It's easier in the example of a bullet

#

The Instigator would be the Character who shot it i would say

#

So Character -> Weapon -> Bullet

#

Weapon Spawn is instigated by Character and that passes onto the Bullet

#

In most cases I only use the Instigator when applying damage

#

To handle who killed a person in case the health goes <= 0

sharp spire Apr 12, 2018, 7:00 PM

#

That’s the impression I was given aswell

#

But my biggest question with that, is why can’t the owner technically handle that?

#

Sorry if this is an obvious question, it seems like it is

thin stratus Apr 12, 2018, 7:01 PM

#

In that case they could both do that

#

But there are probably cases wher ethe owner is not hte instigator

elfin slate Apr 12, 2018, 7:01 PM

#

How do I sync a replicated variable to a client that joined late?

thin stratus Apr 12, 2018, 7:02 PM

#

Replicated Variables do that by default

elfin slate Apr 12, 2018, 7:02 PM

#

That's what I thought too

#

Variable is marked with RepNotify

#

Are those variables set before BeginPlay is called?

thin stratus Apr 12, 2018, 7:04 PM

#

Just print in RepNotify and BeginPlay

#

easy enough to test

elfin slate Apr 12, 2018, 7:05 PM

#

True

sharp spire Apr 12, 2018, 7:40 PM

#

One last question for awhile I think, how are clients handled as individuals when referring to them? For example how would I reference another player in the game. Do they have clientIDs still? Or are there exposed player handling features when using subsystems

thin stratus Apr 12, 2018, 7:51 PM

#

Well usually you use the UniqueNetId

#

But as it is, that's not exposed to BPs

#

You can get it via the PlayerState

#

You can however expose it by using "FUniqueNetIdRepl"

#

That one should work

#

But yeah requires a small portion of c++

#

Despite that you have the PlayerId in the PlayerState exposed to BPs

#

Not Unique outside of the round I think

#

@sharp spire

sharp spire Apr 12, 2018, 7:59 PM

#

Could it be as simple as adding a player to a custom uniquePlayerID array, and assigning the player to that ID as a permanent ID?

#

Sounds like using unreal engine out of the box can’t really handle multiplayer with accounts. Is that a correct assumption? Lol

#

If I were making a mobile game through iOS, Game Center couldn’t handle playerID?

#

Oh wait I just realized C++ is out of the box, I was thinking it was only with the source code

severe widget Apr 12, 2018, 8:18 PM

#

strictly speaking out of the box it doesn't do accounts

#

but yeah you can do C++ with the launcher version.

sharp spire Apr 12, 2018, 8:39 PM

#

But you can setup accounts on various platforms with c++ correct?

meager spade Apr 12, 2018, 10:08 PM

#

why is GState->PlayerArray returning 17 player states? is it my AI that also has a player state?

#

nvm, i noobed out 😄

bleak cloud Apr 13, 2018, 12:25 AM

#

For code thats running on the server, is there any way to get the rotation of the camera of the player that initiated the call? Or do I have to pass that in to the RPC?

fossil spoke Apr 13, 2018, 12:27 AM

#

@bleak cloud The PlayerCameraManager exists for each Player on the Server. You can query the current Cameras location and rotation via the PCM on the Server side.

bleak cloud Apr 13, 2018, 12:28 AM

#

@fossil spoke How would I go about getting the correct players camera manager? The way I currently have it, it's just using the servers camera manager.

fossil spoke Apr 13, 2018, 12:28 AM

#

The PCM exists on the PlayerController

#

Grab whatever player you want and query the PCM from their Controller

bleak cloud Apr 13, 2018, 12:29 AM

#

Is there a call to get the PC that initiated an RPC?

sharp spire Apr 13, 2018, 12:29 AM

#

Can anyone explain to me why in my topdown game, when replicating movement, rotation is replicated to each client; but not locally... lol

fossil spoke Apr 13, 2018, 12:31 AM

#

@bleak cloud What class Object was the RPC called from?

sharp spire Apr 13, 2018, 12:31 AM

#

all i am replicating is the location of the click; and the moveto

bleak cloud Apr 13, 2018, 12:33 AM

#

The input is in the possessed character, which has an rpc that calls a function in a weapon blueprint that goes through logic for firing/spawning a projectile

#

I'm passing the players camera in to the projectile transform for spawning

#

📎 CameraManager.PNG

#

Obviously getting the player camera manager is doing exactly what it should, I'm just not sure how I should get the camera manager for the player that initiated this

sharp spire Apr 13, 2018, 2:01 AM

#

https://answers.unrealengine.com/questions/204517/top-down-character-rotation-replication.html?sort=oldest is this my issue? im so terrible with this.. i cant figure out why it wont show locally but itll show over the network. (each client can see the rotation of another clients pawn, but my own pawn wont rotate for me)

sharp spire Apr 13, 2018, 2:31 AM

#

Sorry that was lazy of me, so basically I’m lead to believe you have to disable all automatic rotating “orient rotation” in pawn; and then recreate rotating probably using the same gate I used when you touch the screen and set the actor to your new touch location ? Seems like it wouldn’t be terribly costly

heavy marlin Apr 13, 2018, 4:16 AM

#

guys its completely possible im retarded

#

but say you have a 64 player game

#

if everyone is moving, and you have a tick rate of 100 which is default

#

thats near half a million messages a second

#

for the positions alone thats 3 megabytes a second

#

ok thats not bad, but i dont understand how half a million messages a second is a thing

wary willow Apr 13, 2018, 4:27 AM

#

@heavy marlin https://www.youtube.com/watch?v=s7Aokpe2HmM

YouTube

Battle(non)sense

Fortnite 3.4 Increased The Server Tickrate?

The Unreal Engine (which powers both Fortnite and PUBG) really struggles under the load generated by 100 players, which results in a server tickrate of just ...

▶ Play video

sharp spire Apr 13, 2018, 4:49 AM

#

is there a simpler way than this for replicating speed? https://gyazo.com/9112c3ce0d0d14f0a5c2e6bd38cada45

Gyazo

#

speed for an animation blendspace, sorry

heady delta Apr 13, 2018, 5:08 AM

#

if the animation blendspace is getting its speed from the character than chances are the server has that data already!

sharp spire Apr 13, 2018, 5:20 AM

#

Ooo how do I access that data? Haha

#

Because before adding that tidbit, using the getpawn->getvelocity->vectorlength-> wouldn’t replicate 😦

#

@heady delta

#

The character movement component isn’t exposed in blueprint is it? I believe it’s not replicated by default but if it is that would have worked right?

heady delta Apr 13, 2018, 5:26 AM

#

in the character, at the bottom of the components you will find the movement component, in the character BP you want to make sure that the actor is set to replicate, then the server will automatically take care of movement replication etc

sharp spire Apr 13, 2018, 5:26 AM

#

Technically the speed is replicated somewhere, because you can see how fast the other player is moving by default

#

It has all that setup, but my character was stuttering locally mainly in idle

#

But the other client saw him moving fine

heady delta Apr 13, 2018, 5:29 AM

#

so you mean on the listen server, the characters movement was stuttering, but smooth on other viewing clients?

sharp spire Apr 13, 2018, 5:33 AM

#

Running dedicated with Two clients, the client moving would stutter, while the viewing client saw smooth walking

#

Client 1 walked around and I’d be stuttering, while client 2 saw clients 1 pawn walking smooth.

heady delta Apr 13, 2018, 5:34 AM

#

that would tell me you have something on the local client that is trying to override the servers setting and the server is forcing corrections on that client

sharp spire Apr 13, 2018, 5:35 AM

#

Could you possibly PM me a fix? I have to get to sleep lol I’m new to replication

heady delta Apr 13, 2018, 5:35 AM

#

like changing max speed without doing it on the server

sharp spire Apr 13, 2018, 5:35 AM

#

Hmm

heady delta Apr 13, 2018, 5:35 AM

#

I'm actually at work and gonna be packing up shortly 😦

sharp spire Apr 13, 2018, 5:35 AM

#

I have nothing coded it’s a blank top down

#

Just replicating movement as it’s not done by default

heavy marlin Apr 13, 2018, 6:54 AM

#

heres an interesting pull request: https://github.com/EpicGames/UnrealEngine/pull/4401

#

world origin shifting in MP

bitter oriole Apr 13, 2018, 7:01 AM

#

An interesting backlogged pull request

grand kestrel Apr 13, 2018, 7:10 AM

#

We've had world origin shift in MP for a very long time

heavy marlin Apr 13, 2018, 7:19 AM

#

yeah but i thought it was ....iffy

verbal wave Apr 13, 2018, 7:25 AM

#

guys is it possible to send class pointer via multicast?
I have

USTRUCT()
struct FWhichBall {
    GENERATED_BODY()

    UPROPERTY(BlueprintReadOnly)
    ABall *TheBall;
}

And I want to execute multicast RPC with it

MulticastSqueezeBall(FWhichBall *WB);

#

But client blueprint only gets WB.TheBall == nullptr as result

Edit: Now I use OnRep function to do the whole thing, because according to google pointers can't be used as RPC parameters, even if they are UPROPERTY. Correct me if I'm wrong.

fleet sluice Apr 13, 2018, 8:25 AM

#

@heavy marlin Regarding you observation about the million messages per second: the mechanism is more complex. This is how it works:

Every tick, the engine gathers all replicated variables which have changed (unchanged ones are ignored, in theory), as well as all RPCs.
It bundles all that data into a packet, in the same tick.
Also in the same tick, it sends the generated packets to all your 64 clients (according to your example).

The conclusion is that it actually sends anywhere between 0-64 packets per tick, of different sizes.

If the data to be sent to a particular client is bundled into a packet which is too large (above the MTU - max transfer unit), it will whine about it in the log and NOT send it.

twin juniper Apr 13, 2018, 8:41 AM

#

Hello

#

Please is there an option to disable whole tile in World composition if there is not currently anyone near it?

#

So all the actors and everything will be disabled on that tile until someone comes

heavy marlin Apr 13, 2018, 8:54 AM

#

ok thanks for the clarification vlad

#

@wary willow this battle-non-sense YT channel is pretty cool

wary willow Apr 13, 2018, 9:01 AM

#

it is

fleet sluice Apr 13, 2018, 9:09 AM

#

+1 to the channel being cool.

#

I watched a lot of his videos.

hidden thorn Apr 13, 2018, 11:08 AM

#

Am I allowed to do this?

#

UFUNCTION(Server, Reliable, WithValidation)
void Server_AddItem(class AItemBase* Item);

UFUNCTION(Server, Reliable, WithValidation)
void Server_AddItem(TSubclassOf<AItemBase> Item);

#

It says that Error: 'Server_AddItem' conflicts with 'Function /Script/RPGProject.RPGPlayerInventory:Server_AddItem'

brittle sinew Apr 13, 2018, 11:17 AM

#

No, UFUNCTIONs cannot be overloaded.

#

(even disregarding the fact that generated functions for RPCs would make it double difficult)

hidden thorn Apr 13, 2018, 11:38 AM

#

Oh ok

shadow lichen Apr 13, 2018, 11:54 AM

#

If I want to do health server side, I should make health changes via an Event, not a function, right?

untold sun Apr 13, 2018, 11:56 AM

#

I am learning about networking... is the following model about networking correct: go from client to server: use rpc. go from server to client: replication. Of course there exists some special features like multicast or something else I don't know about.

#

when I read about the PlayerController exits on server and client. what exactly does that mean? It mean original object on the server and replicated object on the client? Or is there any other mechanism involved?

hidden thorn Apr 13, 2018, 11:59 AM

#

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

#

If you go to page 9 you can see the things shared by the server/clients

#

The PlayerController of each client exists on the server, but on the client only his own PlayerController exists

hidden thorn Apr 13, 2018, 1:00 PM

#

I have a question, lets say I craft an item, do I spawn that item on the server, owning client or on all the clients including the server?

meager spade Apr 13, 2018, 1:08 PM

#

@shadow lichen send the request from the client to the server, and get the server to send the change to the client, the server really should be the only way the health can change anyway, for cheating purposes.

hidden thorn Apr 13, 2018, 1:47 PM

#

Is it possible to do this?

#

UFUNCTION(Server, Reliable, WithValidation)
virtual void Server_Use();

#

When I override it in the child class I get an error saying function 'void AItemBase::Server_Use_Implementation(void)' already has a body

brittle sinew Apr 13, 2018, 2:01 PM

#

Are you redeclaring Server_Use?

#

If so, don't—only override Server_Use_Implementation

#

If you redeclare the normal RPC function in a child, it attempts to redefine the function

hidden thorn Apr 13, 2018, 2:12 PM

#

On the parent

UFUNCTION(Server, Reliable, WithValidation)
virtual void Server_Use();

On the child

//.h
UFUNCTION(Server, Reliable, WithValidation)
virtual void Server_Use() override;

//.cpp
void XXX:Server_Use_Implementation() {...}
bool XXX:Server_Use_Validate() {...}

#

This is how I was doing it

brittle sinew Apr 13, 2018, 2:13 PM

#

Yeah, just override _Implementation and/or _Validate.

hidden thorn Apr 13, 2018, 2:14 PM

#

oh ok

hidden thorn Apr 13, 2018, 2:50 PM

#

Can I call Client/Server.. RPCs on a widget that I created inside <ProjectName>HUD

#

I created it like this InventoryWidget = CreateWidget<UInventory>(GetOwningPlayerController(), Widget);

brittle sinew Apr 13, 2018, 2:54 PM

#

Widgets aren't replicated.

hidden thorn Apr 13, 2018, 2:56 PM

#

I know I don't want to replicate the widget to any client, but I thought I could still call a Server or Client RPC on it.

brittle sinew Apr 13, 2018, 2:56 PM

#

Once again, it's not replicated, so calling an RPC on it doesn't really make sense.

#

An RPC calls a function on another instance of a replicated object.

hidden thorn Apr 13, 2018, 2:57 PM

#

Again I know, but I didn't know it had to be replicated in order to be able to call RPCs on it

#

So thanks for clarifying that

meager spade Apr 13, 2018, 2:59 PM

#

is root motion viable in networking?

sharp spire Apr 13, 2018, 3:10 PM

#

Simple question, where can I access the already replicated speed variable? My characters definitely move at a set rate, but my animation isn’t updating so It’s clear my method of getting the speed is the default replicated variable. Anyone know? I’d imagine it’s very simple. Does the CharacterMovement Component have a way of accessing velocity? That would be the only option that makes sense

#

Isn’t the default replicated variable *

hidden thorn Apr 13, 2018, 3:12 PM

#

@sharp spire On the character do GetCharacterMovement()->Velocity

#

Just know that it is not replicated

sharp spire Apr 13, 2018, 3:12 PM

#

There is an already replicated variable by default. There has to be or I wouldn’t see other players moving at the same rate

thin stratus Apr 13, 2018, 3:12 PM

#

There is non

#

Grab the Velocity

sharp spire Apr 13, 2018, 3:12 PM

#

My charactermovement complement is set to replicate

thin stratus Apr 13, 2018, 3:13 PM

#

Characters move based on the MaxWalkSpeed

#

Or other value sbased on the movementmode

#

If you set that on everyone, then Velocity->Length is the current speed

sharp spire Apr 13, 2018, 3:13 PM

#

Oh so that’s not actually replicated, just default speeds?

hidden thorn Apr 13, 2018, 3:13 PM

#

@sharp spire GetCharacterMovement()-MaxWalkSpeed also isn't replicated but using a Multicast you can let others know

sharp spire Apr 13, 2018, 3:14 PM

#

Right, I created a CustomSpeed variable that is set to replicate and use that to drive my animation and it works. Is that the most appropriate method?

hidden thorn Apr 13, 2018, 3:14 PM

#

That's what I did at first, but went back to using Velocity because I was just doing a lot of work to smooth the animation

sharp spire Apr 13, 2018, 3:15 PM

#

My custom speed variable is set by my pawns velocity length

hidden thorn Apr 13, 2018, 3:16 PM

#

You might as well just use GetCharacterMovement()->Velocity, the animation will update on all the clients anyway

sharp spire Apr 13, 2018, 3:16 PM

#

It will? So this setup isn’t needed ?

#

📎 image.jpg

hidden thorn Apr 13, 2018, 3:16 PM

#

No

#

Nope

sharp spire Apr 13, 2018, 3:17 PM

#

Could you possibly post an example? I’m still confused somehow

hidden thorn Apr 13, 2018, 3:18 PM

#

If you look at the third person controller this is how they do it: https://i.imgur.com/Dk0MVUa.png

Imgur

sharp spire Apr 13, 2018, 3:18 PM

#

Oh wait so instead of the custom variable, you’d just send the velocity length straight to the server?

#

That doesn’t update my animation though

hidden thorn Apr 13, 2018, 3:18 PM

#

That is inside the Animation Blueprint

sharp spire Apr 13, 2018, 3:18 PM

#

Not locally anyway

#

I can’t remember if it’s locally or networked that the character would stutter in idle

floral ingot Apr 13, 2018, 3:19 PM

#

So I have a function in my player controller that is updating a simple health indicator (5/100) etc for the local player, but its being called through the players controlled pawn. But, when they take damage/heal and I'm calling the function in the player controller, its only updating on the server.

Eg its updating only the servers hud with the damage/healing. Instead of each clients own. Any suggestions?

hidden thorn Apr 13, 2018, 3:19 PM

#

@sharp spire https://i.imgur.com/U8ibmMR.png

Imgur

#

connect IsValid with ForwardSpeed

#

@floral ingot Is health marked as Replicated?

floral ingot Apr 13, 2018, 3:22 PM

#

nah

#

and using getcontroller instead of playercontroller at index 0 wont let me cast to my playercontroller bp

thin stratus Apr 13, 2018, 3:22 PM

#

Velocity and all of that has nothing to do with Multiplayer. Your Character walks based on MaxWalkSpeed.
So its speed is between 0 and MaxWalkSpeed.
You can grab that speed through the Velocity Length.
You don't need to replicate anything in that regard.
The only thing you need to replicate is if you change the MaxWalkSpeed variable.

#

@floral ingot Damage event in Character is hopefully on the Server

#

So "GetController->CastToCustomPlayerController->ClientRPC->UpdateUI"

floral ingot Apr 13, 2018, 3:23 PM

#

yeah it is

#

i may have found my culprit, a moment

sharp spire Apr 13, 2018, 3:26 PM

#

@thin stratus my only issue is my blendspace in my animation is stuttering in idle instead of walking

#

Is it being overridden somewhere?

thin stratus Apr 13, 2018, 3:26 PM

#

Not that I know

#

If you use Velocity

#

and it's stuttering

#

then it might be your blendspace setup

floral ingot Apr 13, 2018, 3:30 PM

#

it seems it might be because the player controller is being accessed through the players pawn and creating the in-game ui that its only doing it for the server. getting an access none when trying to update on the client, because they havent set it up right

sharp spire Apr 13, 2018, 3:56 PM

#

What should I use to drive a locomotion animation’s variable? I’m using try get pawn owners’ velocity length and setting the animation blueprints’ variable which sets the blend space axis

solar halo Apr 13, 2018, 4:31 PM

#

How much different is listen to dedicated? Like in terms of the code?

fleet sluice Apr 13, 2018, 4:46 PM

#

@solar halo 99% the same. Why?

flat bison Apr 13, 2018, 5:01 PM

#

So question, is using "Move Component To" for dodging a good method, cause my replication for it is worked but drags the pawn back to the previous actor location after dodge

modern dome Apr 13, 2018, 5:10 PM

#

I am in PlayerState.Tick.
I want to track the Players Location (Distance Travelled). How do I get the Local Player Pawn here?

#

Remote doesn't fire, only Authority

📎 unknown.png

wary willow Apr 13, 2018, 5:21 PM

#

Just do that in the playuer

#

and set it from there

thin stratus Apr 13, 2018, 5:21 PM

#

Also Tick Event should fire for the Clients o.o

heady scroll Apr 13, 2018, 5:23 PM

#

So uh