multiplayer

[thin stratus]

Yeah sorry, if you call RestartPlayer, then you need the DefaultPawn to be set

Only if you actually call SpawnActor by hand you'd set it to none

[real ridge]

i am lost i am done XDD its still spawning away gonna try print value which is entering game mdoe

mode

server is getting my blue value then problem is in choosing player starts hm

but what can be wrong on it , every start is tagged from 1 to 10 hm

it choosed 9 i saw it and 9 is near blue base

okay giving up with it will use decals instead player start

it worked for me before

i am giving it exact value 9 and it spawn me anyway on other player start

[grand kestrel]

@thin stratusThanks so much for your help with the stamina

[kindred widget]

Curious thought about replication and static data references. Say I have objects that are being replicated. Lets say they reference a DataAsset to pull static data from.

What happens on the client when server creates one of these and replicates it with that hard pointer? The DataAsset has to be loaded before the object can be created on the client via replication, but is this done Async or synchronously?

Mostly trying to ask if the server replicates an object that forces the client to load required assets, if it'll cause frame hitches or just async load and create after?

[latent heart]

I'm pretty sure it would synchronously load the asset when it received thr hard ref in the rpc.

Rep a soft ptr and handle thr async load yourself.

[kindred widget]

I assumed as much, but was mostly curious.

[south crest]

what would cause NetLoadOnClient to work, but the objects appear at 0,0,0?

[latent heart]

Are you using deferred spawning?

[south crest]

just spawn actor, in blueprint

and they spawn correctly once already connected, but new client connects and sees them at 0,0,0

[twilit radish]

Vori using deprecated methods in his blog smh.

UE_DEPRECATED(5.0, "Use GetNetMode or IsNetMode instead for more accurate results")
bool IsServer() const;

[prisma snow]

shame shame ^^

[verbal tendon]

Agree

[fathom aspen]

In his defense: He used it before it was deprecated

[twilit radish]

Defence denied.

[verbal tendon]

No defense necessary where no crime was committed

[twilit radish]

I'm following Vori's blog and my editor is crashing because it tries to procedurally generate my actors while I'm creating a BP derived class of the gamemode.. It actually inits the GM for some reason 🤣

:BlameVori:

[rose egret]

was there any pre onrep_ function in actor ?

I cant find it

[fathom aspen]

What is a pre onrep_

[twilit radish]

@pallid mesa there's absolutely no way that your blog post works in 5.1 because of this 🤣
The engine spawns a game mode actor when creating a derived Blueprint class for the preview window which calls the method you override to spawn the actors which in return causes a crash because I've not been able to deal with any of the variables yet and obviously I can't.

@rose egret

    /** Always called immediately before properties are received from the remote. */
    virtual void PreNetReceive() override;
```in actor.h

[pallid mesa]

That's not hard to fix, Thom, you can do better than that boohoo

[twilit radish]

You want to know why yours works and mine not?

[pallid mesa]

yeah shoot

[twilit radish]

void AProcGenGameMode::InitGameState()
{
    Super::InitGameState();

    AProcGenActor* MainSpawner = nullptr; <--- NOT A GARBAGE POINTER
    for (AProcGenActor* Spawner : TActorRange<AProcGenActor>(GetWorld()))
    {
        MainSpawner = Spawner;
        break;
    }

    if (MainSpawner == nullptr) return; <--- Only works because of 

    RandomSeed = FMath::Rand();
    MainSpawner->ProcGen(RandomSeed);
}
```Versus yours:
```cpp
void AMyGameMode::InitGameState()
{
    Super::InitGameState();

    for (AProcGenSpawner* Spawner : TActorRange<AProcGenSpawner>(GetWorld()))
    {
        ProcGenSpawner = Spawner;
        break;
    }

    RandomSeed = FMath::Rand();

    ProcGenSpawner->ProcGen(RandomSeed);
}

Yours is a garbage pointer. The moment I added my return if nullptr it works.

So it probably just acts on garbage data but still works because of it.

Big shame on you Vori 🤣

[pallid mesa]

What do you mean?

[twilit radish]

My editor crashes without the nullptr return. Your InitGameState() method gets called in the editor preview window when creating a derived blueprint class for the game mode.

Because the editor spawns the actual gamemode to preview it.

[pallid mesa]

then guard it so it only gets called in game 😄

[twilit radish]

See this callstack.

[pallid mesa]

mhm it makes sense, you should also know that the article is not performing any safety check

it just assumes things will exist and are called on context

more verbosity will simply make the article harder to understand, you are not supposed to copy and paste

but to understand it!

[twilit radish]

I'm not copy pasting, that's exactly why my editor crashes and why I found a flaw in the way you did it without you ever realising you had this issue.
So once again, shame on you.

[pallid mesa]

but yeah I know I haven't added any nullptr check... it can explode in many different manners 😄

if I didn't add the spawner in the world it crashes aswell, did I bother? no

why? - because I don't care, null safety isn't what the article is about

[twilit radish]

This is not the actual world I'm talking about Vori. This is upon clicking the "Derive blueprint class" button in the editor for creating the game mode blueprint class.

[pallid mesa]

yeah, I know 😄

I'm just pointing out another example

[fathom aspen]

In his defense: I addressed something similar to him once and he told me the same, and he's right.

If it was me, then you could argue, but you won't find such

[twilit radish]

No, I'm absolutely going to blame him for running code on a garbage pointer 😂 ❤️

[pallid mesa]

need to add a liability notice at the beginning of every article

[twilit radish]

Also now that I can actually run my code I can finally see if I was right or not about why I was setting this entire thing up in the first place lol.

Soon™️ 👀

[pallid mesa]

there'll be a followup in 5.2

as this fluff is no longer needed

😄

[twilit radish]

What are they changing in 5.2?

[fathom aspen]

Iris I guess

[pallid mesa]

no

for the most part it's level instances

the level instances need to be stably named

but that's all u need to ensure

[fathom aspen]

And it just magically works™️

Dayumm

[pallid mesa]

kinda

the need of spawning actor by actor is cause we didn't have any way to group actors

now there'll be one

[fathom aspen]

mhm I see

[fathom aspen]

CAC tho

[pallid mesa]

thats

i want to bonk you wizard

x'D

[fathom aspen]

🤣

[gaunt cliff]

Is it possible to create an RPC function in C++ and have it be overridable in Blueprints ?

[twilit radish]

Just call in the C++ implementation of the RPC a function that BPs can override. I don't think BPs can directly override the implementation.

[gaunt cliff]

if the BlueprintImplementableEvent is called from a Server would it be executed only on the server ?

just making sure my logic is true

[twilit radish]

If it's a server RPC it runs on the server yes.

[fathom aspen]

Either that or dropped (not executed at all)

[gaunt cliff]

alright good good

I understand that only AActor/UActorComponent can have replicated function, however we need an interface that handles some common interactions and stuff, but compiling it with Server, Reliable does not work

[dusky yoke]

Hey! Thanks for the feedback!
So in regards to that, I've set it up so that when the player starts up the game, they get to select their class in the main menu - Warrior, or Paladin.
https://i.imgur.com/93Y00F2.png

The class information is sent to the gameinstance, which stores the Pawn Class variable:
https://i.imgur.com/ReGuYeI.png

The client's character controller references this information when spawning it's pawn - this is probably where I'm doing something wrong, I'm not sure what's the best place to actually decide the spawning of the class when it comes to replication and such. I saw some tuts/documents doing it with the player controller, but alas, I've tried adding RPC's for all of these events aswell, but they give unwanted results.
https://i.imgur.com/PkvMttH.png

This is how it looks like when I do no RPC's for selection of classes etc - the server spawns a duplicate of it's own class (server on the left side, does not see the Paladin aka golden armored dude), and the client takes possession of that duplicate instead of it's own selected class, Paladin.
https://i.imgur.com/b6BApER.jpeg

Any tips on where I'm taking wrong steps here? 😅

[fathom aspen]

Not entirely true, subobjects can have them too

The interface wouldn't have the Server RPC per se, but the Actor would have it, the interface would just have the Interact() function that gets called from the server RPC that exists in the actor for example

[verbal tendon]

TL;DR If you put code online it should work, without crashing

😁

And yes in perpetuity, so if future engine changes break your code. Shame on you 🙊

[fathom aspen]

vori quits writing articles

[verbal tendon]

Also .. death does not annul your contractual obligations

In the event of your death, you will still be expected to make sure your code continues working in perpetuity

[twilit radish]

@dusky yoke First of all, you can't call RPCs inside of widgets. They have no networking capability. Second of all I would recommend you spawn the character inside the gamemode and not inside the controller. The controller is currently spawning a local version of the pawn, that's not what you want. The server should spawn the pawn, have the appropriate player controller posses that pawn and then let it replicate towards the player(s).

[pallid mesa]

Back on topic: If you deep dive on details rather than the concept itself, then it's a lost attempt of learning something. Hence my decision will be puting a liability notice at the beginning of every article

[barren patrol]

anyone played with Iris yet? Should I bother learning RepGraph at this point?

[twilit radish]

Unless you need it right now I would not bother with rep graph any more.

[verbal tendon]

I'm not up-to-date is there new goodies planned on the way?

[twilit radish]

With Iris rep graph is being yoinked away.

[river hazel]

Iris filters seem like they can do what the repgraph was used for in a very similar way

[twilit radish]

IIt is also important to note that Iris does not support the Replication Graph. While Iris does not have any concept of “nodes” to control when and where actors are replicated, the new net object filters and prioritizers are intended as a replacement for the functionality provided by the Replication Graph.

https://dev.epicgames.com/community/learning/tutorials/Xexv/unreal-engine-experimental-getting-started-with-iris

[barren patrol]

yeah i read that blog post which is why i was asking. it looks like a solid replacement to go with long term

but has anyone tried it out? its still experimental

im ok with some quirks but not really interested in having a broken project if its hugely buggy

[thin stratus]

No worries. Does it work now?

[thin stratus]

Then you are at a tough little point. Iris will probably take a few more versions before it actively replaces normal replication. If your project doesn't ship anytime soon, then you can try Iris out. Otherwise RepGraph is probably the saner idea

[barren patrol]

that was my intuition. tough spot heh

im reading repgraph code now. i think it will be useful to learn if only to understand choices made in iris

it seems like they are trying to do things similar in some ways (no virtual per-frame function calls) so im guessing the ideas in iris will be similar (tracking lists externally but in a filter class or smth)

hopefully it wont be too painful to port a repgraph setup over to iris filters

[dusky yoke]

Thanks for the feedback, got it to work now 🙂 https://i.imgur.com/YZBXcL9.png

[fathom aspen]

Usually, but no not really

Use this beauty instead UGameInstance::GetFirstLocalPlayerController()

I also assumed you are calling it locally (i.e. not on a dedicated server for example), but to be extra safe this is what happens when you call it in various different contexts

[real ridge]

iis there any way how to on choose player start tell function which player start I want use for specific controller?

no on server it will find nothing

but u will be able to call it

[kindred widget]

In seamless travel situations on a ListenServer, GetPlayerController(0) can return a client's player controller.

Super rare. But can happen.

[fathom aspen]

inb4 but kudos to you for explaining it to me at the time @kindred widget 😛

[real ridge]

jesus u know this?

[fathom aspen]

no it's hard

[real ridge]

Amen

[grand kestrel]

Beautifully, no desync at 220ms. Although I've yet to introduce pkt loss

[peak sentinel]

save them to AWorldSettings, organize their indexes or set some tags for them, and during ChoosePlayerStart select based on index or tag depending on player?

[thin stratus]

PktLoss is always gonna do shit

[peak sentinel]

PktLoss scares me a lot

[grand kestrel]

Yeah just want to see how it recovers

But tbh it probably doesn't matter at that point

Who knew stamina could be such an ordeal 😅

[thin stratus]

Makes you understand why people (hopefully) say that Multiplayer Movement can't be done properly in BPs

[pallid mesa]

this is for stamina in the cmc, right?

That's very sweet 🧁

[surreal niche]

I just recently watched the Rocket League GDC talk about how they handled their networking, and they insist on a fixed timestep for physics.

Would that mean using the async physics tick on 5.1?

(I'm recreating a very simplified version of the character movement component to better understand networking)

(That also means not using the FRepMovement)

Also, related question, why does the character movement component depend on replication from the pawn instead of doing the replication within the component itself?

I heard component replication was worse but how is it actually worse?

[grand kestrel]

For sure. I definitely already knew it but this is a level above 😄

[grand kestrel]

I'm going to move the solution to a plugin I have which includes sprint and prone and also a shell for strafe (doesn't actually impl what strafing is for you). I found it was a lot cleaner to have them in separate movement components. Then I'll make the plugin public

[pallid mesa]

That's... very sweet Vaei, that's super super sweet, and I want to thank you personally for that 😄

[thin stratus]

What became out of the mini wiki

That you wrote me about

I already helped someone else in the past with the same topic and they wanted to release something showing an example iirc

:D is this gonna repeat itself until I make a post myself?

[verbal tendon]

Probably a good idea 😄

[real ridge]

guys I have one weird question maybe, if I am creating session with map and I am joining it i have timer there which is already running because its managed from game state of that session how to set things to happen only after first player join or game will start ?

any ideas?

or what is common solution

my session is on dedicated server

[thin stratus]

GameMode has an override for "ShouldStartGame" or so

You can implement that and return true when all players are there

You have to tick "Delayed Start" or so in the defaults of the GameMode for that

[real ridge]

and I can have it paused till i start it ? I have few variables which values are inscreasing by time

and i think they are inscreasing also when I am not already in

for example this

its spawned on map and multiply value by time

its collectible

[real ridge]

so delayed start + then should start game

and everything start working?

by default or i need set stuff in pawns to start then

[thin stratus]

I'm not sure if it will delay your BeginPlay call

But there are events for when the MatchState changes

And it will go to "InProgress" once the Should Start Game stuff returns true

[real ridge]

found this

for start match there is only this

[thin stratus]

Yeah that's it

I'm bad with names

I have to remember too much stuff :D

[verbal tendon]

Brain go 🤯

[real ridge]

so set delayed start after beginn play in game mode and then use ready to start match ? to true means it will start ?

ya?

[thin stratus]

Given that our brain is just some gooie thing, it's quite amazing how much shit it can remember. Like 90% of jokes from Scrubs. Or almost all the Quests from Crossroads in WoW Classic.

is it useful? Probably not

[thin stratus]

You can just set DelayedStart in the Defaults to true

[real ridge]

I do remember only shits i dont need

[verbal tendon]

Memory is survival

[thin stratus]

So I pretty much suck at surviving for remembering the wrong stuff? :D

[real ridge]

just here and let it be? its weird haha

[thin stratus]

Yes

[verbal tendon]

Nah, but as long as in the old days, you remembered your shelter and fresh water source, you were better off than if you didn't remember

😁

[thin stratus]

Fair

[real ridge]

but now how i can set delay I just should use that function to say it start ya? btw block me if my questions are out of the border hahhahaa

[thin stratus]

Good old days

[thin stratus]

Depends on what your condition for starting the game is supposed to be

[real ridge]

atleast 1 player joined

so first one join and bum starting

[thin stratus]

https://giphy.com/gifs/ban-banned-admin-fe4dDMD2cAU5RfEaCU

Wrong quote

But well

[thin stratus]

The make a boolean for example called "bShouldStartGame"

Connect that to the return of the ReadToStartMatch

Set it to true in the PostLogin function

That will call for each player, so the first to join will set it to true and start the match

[real ridge]

did this

but it seems too easy

lol

[thin stratus]

Only if some Mod from a Server tells you how it works ¯_(ツ)_/¯

[real ridge]

bcs literally if anyone join i want start

[real ridge]

[thin stratus]

I'm going to the couch now though

So good luck !

[real ridge]

Thank you I should pay you for those convos here - /w me

to cover your mental health

[thin stratus]

The Damage UE has done in the past 6 years can't be healed

Should send Tim an invoice

[real ridge]

damage after 1 year with ue is too big also for me

cant imagine how much for you

[vivid egret]

Hey folks, I am building an experiment for my lab. Each player has an interface that gives them test questions basically. the tricky thing is they can see eachothers answers so their has to be a connection and a timer for syncing them.

I have tried storing the timer variables in an instance, and only incrementing them on the host. However, the clients only retrieve the timer variables on connection, not on every tick. Any suggestions?

[pallid mesa]

ah yes, you told me about it. It's an ambitious idea and I appreciate it a lot...

I love being part of a community that is willing to share, it's amazing

It takes time and dedication, and lately there's not much of the former

[soft relic]

@vivid egret Quite hard to answer this as theres not much context. Besides that though, here's a few notes:

• If you need to call a function with a different rate that your Tick, you can make use of the timers (SetTimerByEvent etc.). Since firstly, you dont want to overload your tick but also its not even really called every frame as you have a delay there.
• You dont need to manually sync values between users like this, theres different approaches but maybe one way would be to have a RepNotify variable with the answers of users stored in there, so that they only get replicated/synced from server(your host) to clients when changed.

[real ridge]

guys foolish question but how I can set friendly healthbars to green and enemy´s healthbars to red?

:DDDD

how

i replicate it to one widget

[vivid egret]

I would have booleans or tags associated with friendlys and enemies. Then just set colorbar to [color] based on boolean

[real ridge]

hmmm

but he need to replicate his widget like twice

for friends

as green

and for enemies as red

still dont get it

[real ridge]

guys is there any setting where I can set range from which I cant see replicated thing?

some value

if I am too far it will disappear

[soft relic]

@real ridge A few ways of doing this, a quick simple way would be to have a Team variable on the pawns or their player states, and locally for each user compare their local team variable with the other pawn's team variable, if matches green, otherwise red

[real ridge]

i do have

that variable

but how I can print 1 widget in 2 different colours is for me secret

i am dumb?

its late and my brain is dead lol

[soft relic]

Well, firstly you need to send to the widget who the owner pawn is, maybe by casting to the user widget object of the 3d widget component and passing its pawn reference.at begin play, once the widget comp is ready. Then, inside the widget event graph, you could check and compare owner pawns team with local pawns team (GetPlayerPawn etc.)

But ideally I would move your team setting to the player state, as thats the correct place to have it in the first place

[real ridge]

i have all variables I need team in player staet

state

and name there

but still dont get how to print it in 2 colours in same time

XDD for everyone

when its replicated

[twilit radish]

To answer your first question, yes it requires the async physics to do it similarly to them. However it’s very much experimental with networking and in general, I had a hard time using it last time I looked at it. And the reason they use the character and not the component is because components have a small network overhead (I believe to identify the component) which isn’t normally an issue but is when you send it a whole bunch of times per second.

[surreal niche]

@twilit radish I see, I guess I'll have to experiment on my own to check stability, thank you for telling me of your experience with it.
As for the second one, is it really that bad? I guess I'll run some benchmarks to check because it sounds really over the top (not doubting you, just surprised it does affect it that much)

[twilit radish]

It’s not so bad, but when you’re running this ~60 times a second on average if you can save it with very little work why not 🤷‍♀️

[real ridge]

guys its not possible to call server,multicast to set name from pawn which is placed in world?

like base

or anything else

[serene basin]

Hey guys, does anyone here have experience with using PlayFab dedicated servers in their multiplayer game? If so, I have some rather high-level questions and would love to chat :p

[kindred widget]

Why are you multicasting the player name?

[grand kestrel]

Here is my plugin that forms the basis of movement abilities for my own game. Decided to open it up since @thin stratus was so gracious with his prediction code that was used for the Stamina.
https://github.com/Vaei/PredictedMovement/ & example video showing it in use : https://youtu.be/SHVm57AMruc
Feel free to link it in the future if anyone could make use of it. ( @pallid mesa )

[grand kestrel]

I put credit in the UStaminaMovement header btw, if you want a link on the git page or something just let me know

[thin stratus]

I actually don't use PrepMoveFor and setMoveFor

I still think it's wrong to reapply stamina for saved moves

[grand kestrel]

Oops, that was basically just left over, I can test without it 😄

[thin stratus]

Yeah it's imo actually a bug if you keep it

Cause you undo the correction with it

[grand kestrel]

What about the bStaminaDrained?

[thin stratus]

Both

[grand kestrel]

Let me do a quick test now

[thin stratus]

Cause let's say the server corrects it to 5 and your move still has the old value of 50. Your saved moves will continue sprinting longer and cause another correction

Cause instead of running out of stamina you will probably have enough to keep sprinting and then send a new server move with a location that the server can't reach

The boolean also comes from the server. Doesn't sound right to override it with the saved move

And for saving it into the saved move, the InitialPosition function should be enough

That's what epic does

At least for the values that are used in combinewith

[grand kestrel]

Are you sure I shouldn't be keeping SetMoveFor? Without that, its always 0 😄

[thin stratus]

Relatively sure. You already have SetInitialPosition

[pallid mesa]

🙏 nice, this is why its nice... initial proposal and a review.

I can't read the code now I have a bit of a fever

but I will take a look soon™️

[thin stratus]

The only reason the stamina is in the saved move is so you can combine it for a combined move

Not for restoring it when replaying moves

And for that it's enough to only use SetInitialPosition

I'm relatively sure at least

Don't have my code in front of me atm

[grand kestrel]

This is what happens when removing SetMoveFor

[thin stratus]

Eh

[grand kestrel]

Its trying to regen but keeps getting set back to 0

[thin stratus]

That should have nothing to do with it

PrepMoveFor is also removed right?

[grand kestrel]

Yep

[thin stratus]

Then the only thing setting your stamina should be sprinting and server corrections

So it shouldn't be 0

Unless you never init it hehe

[grand kestrel]

It clears the regenerated amount every frame too tho

CombineWith is always 0

[thin stratus]

CombineWith should only call on higher frames than 60 by default

SetInitialPosition should be saving the stamina value

[grand kestrel]

Will debug, one mo

SetInitialPosition is never called

[thin stratus]

    virtual void Clear() override;
    virtual uint8 GetCompressedFlags() const override;
    virtual bool CanCombineWith(const FSavedMovePtr& NewMove, ACharacter* InCharacter, float MaxDelta) const override;
    virtual void CombineWith(const FSavedMove_Character* OldMove, ACharacter* InCharacter, APlayerController* PC, const FVector& OldStartLocation) override;
    virtual void SetInitialPosition(ACharacter* Character) override;

That's all I override in my saved move

[thin stratus]

That's part of ::ReplicateMoveToServer

And ::SetMoveFor

void FSavedMove_Character::SetMoveFor(ACharacter* Character, float InDeltaTime, FVector const& NewAccel, class FNetworkPredictionData_Client_Character & ClientData)
{
    CharacterOwner = Character;
    DeltaTime = InDeltaTime;
    
    SetInitialPosition(Character);

So unless you are missing a Super Call, this should call

[grand kestrel]

Yeah it turns out I'm an idiot, one of the classes I made ages ago wasn't using Super but specifying the class 😄

[thin stratus]

Ah

[grand kestrel]

The best part is I had already fixed that, except for SetInitialPosition which got missed

Which makes it even better 😄

[vivid egret]

After 5 hours I have come to a conclusion, why replicate a timer across a network when I can just lag the start time locally? So the fix was to run in GameMode on EventTick a delay node every .25 seconds, and set a GameTimeXXX variable = Get Game Time in Seconds. Then when a player joins, I just add GameTimeXXX to the player's personal Seconds variable, and call the players personal variables to the Widget. This is sufficient for my needs but maybe isnt optimal!

Ofcourse, this will cause problems for anyone joining more than 60 seconds late, because I don't know how to convert more than 120 seconds to minutes, but as long as all your clients join within a minute of start you are gooooood to go 🙂

The purpoose of the delay is to stop it from running every tick. Also this specificies the max lag you can have. .25 seconds of lag time is not a big deal for what i am working for.

Thanks for your help @thin stratus

[grand kestrel]

@thin stratus thanks, I've pushed those changes and it seems to work well; tested with 4% pkt loss and it behaves as well as anyone could hope for

[wintry ruin]

Hi all, I have a packaged game, is there any way to change the maxplayers variable? its running and 16 players joined, then "server full" is displayed. Is there a way to change maxplayers without repackaging the server? This one:
[/Script/Engine.GameSession] MaxPlayers=32
Adding that to Game.ini just gets wiped out when the server starts, and it is limited 16.

[thin stratus]

Dedicated Server?

You can try to add ?MaxPlayers=32 as a start param to the exe

[wintry ruin]

@thin stratus yes, dedicated server. I will try the command line thanks!

[thin stratus]

Can also create a shortcut if it's windows

Of the exe

And edit it

I usually do that anyway to add -log to it

[wintry ruin]

it's an important setting I'm also checking if there is a way to update it programmatically for the future

I see it's in AGameSession::AtCapacity()

[crystal crag]

You can't replicate a TWeakObjectPtr<AActor> can you?

It would have to be hard pointer instead in order to use UPROPERTY(Replicated)

Oh well TWeakObjectPtr isn't supported by reflection, so I guess that answers my own question

[fossil veldt]

Yay hey Talad, hope planeshift stuff is going well :D

[wintry ruin]

@fossil veldt we just switched fully to Unreal some days ago, after 4 years 🙂

[fossil veldt]

weeeeeeeew

[wintry ruin]

so, yes its going well, thanks

[grand kestrel]

@thin stratus btw I tested the stamina with a gameplay ability consuming it, and it worked fine 🙂 I will edit the readme to tell people they might need to flush server moves if there is a delay

[rose pollen]

fwiw with GAS if you do sprint as ability that adds a tag like "sprinting" and has a gameplay effect flat cost of like 1 stamina, then an infinite duration gameplay effect and adds a stamina drain while sprinting tag is present and changes a variable on the attribute set that drives movespeed, and then have the character wait for attribute change on movespeed and set the movespeed, I think the default CMC is fine at 220 ping using network emulation at least. Besides a tiny bit of setup in C++ with gas that is all easily done in BP

you can also have a wait for attribute changed on stamina that checks if its zero and applies an "out of stamina" effect that cancels the sprinting ability and blocks other abilities

[grand kestrel]

That wont get you net predicted stamina, it'll desync 🙂

[rose pollen]

hmm, I thought the attribute set took care of it nicely

i haven't set up careful logging so I guess i wouldn't notice maybe but I've never seen an ability canceled or fail when the players screen showed sufficient stamina

[grand kestrel]

I just went through the whole process myself. I also started from GAS + GAS attributes. Either way the solution is freely available and completely done for you, just check the most recent pin

[rose pollen]

awesome, will take a look

how did you observe the desync? was it obvious or did it require careful logging to spot?

I will try turning the ping up to like 1K or something

[grand kestrel]

Enable p.netshowcorrections 1

It will draw a red capsule where the desync started and green capsule to where it was corrected to

I run a reasonably consistent ~220ms any time I PIE, always, since thats my target latency for a fluid experience, and always with p.netshowcorrections 1. It'll work fine at higher latencies too tho

[rose pollen]

I am targetting a much lower latency so I am usually PIE at 100 so maybe part of why i didn't notice

[grand kestrel]

Yeah my game is more "go on an adventure with your mates" than "shoot your mates in the face"

Well, you can do both, its just not the point 😄

I think 220ms means most people from around the world can play together, other than NZ/AU and EU.. mind you, it probably works fine at 350-400ms latency too so long as the connection doesn't spike

But I'll settle for 220

I think an open world adventure game is a good way to connect with family/friends who go overseas, that's my idea behind supporting really high latency if at all possible

[rose pollen]

very cool, i played a game that was somewhat competitive that was open world single server and their net code just wasn't good enough, I had a friend from NZ and I was in NA and game server was in EU and he would teleport all over which was a real bummer, would have been great to be able to play with him so cool that you are working on it

think 220 gets you just about anywhere like you said

[grand kestrel]

NZ->EU is 350-400ms. NZ->LA(US) is 180-200ms. NZ->East Coast US is ~240-320ms IIRC

I'm not sure how playable even my game will be between EU and NZ 😄

[rose pollen]

did test at 250 ping with netshowcorrections and i definitely do get some corrections if i switch between sprinting and not rapidly or if i run out of stamina while sprinting so will check your code out for sure. if i just am sprinting around in open space there usually aren't any, even if i wave my mouse around to change directions like crazy, so it does seem like its the ability activation / deactivation causing the desync

if i just spam tap / release the sprint key as fast as possible i can get corrections to appear very consistently

[grand kestrel]

Yup that's the end result of using GAS attributes for stamina unfortunately because CMC needs to handle it

Its a pretty painful lesson to learn time-wise

[modest crater]

I feel like im in the 5th dimension managing local delegates and animNotifies, with OnRep notifies and RPCs whilst also managing authority of who runs what when 🥲 Its so crazy how different this shit is from normal programming, Im loving it tho

https://tenor.com/view/cat-gif-26024704

[verbal tendon]

You mention you are experiencing love ... did you mean Stockholm Syndrome ?

[verbal tendon]

It probably won't be a great experience

Unfortunately people from AU/NZ are in a tough spot, because they don't have a low latency to anything

[grand kestrel]

Yep. I live in NZ 😄

[verbal tendon]

My condolences

[modest crater]

Im in aus, I feel that

[quartz panther]

anyone knows why joining session opens wrong map on the client ?
I can see my sessions, the dedicated servers have correct map open, but when i join with client i can see in the logs that the default game map is open on client which is main menu map.

[thin stratus]

Are you sure the client actually joined

Might have been rejected or failed to connect

[pallid mesa]

anyone here managed to implement instant replays?

[quartz panther]

@thin stratus how could i debug this?

[pallid mesa]

Setting the viewtarget is the missing step
https://media.discordapp.net/attachments/992501960508973057/1074138409087553599/image.png
But since the playerstate in the replay world got no owner... it resets to the og viewtarget

[thin stratus]

Checking logs for example

[thin stratus]

No, but maybe this helps? #multiplayer message

[pallid mesa]

no unfortunately not, they dont provide code for that bit

hahaha

[quartz panther]

didn't fail to connect

but let me check again with the fresh build

[thin stratus]

I mean, can't you change that? :D

[real ridge]

because i am i multiplayer?

and everyone need to see it

[thin stratus]

PlayerName is a State and only needs to be Replicated Variable

There is no need to multicast it

[quartz panther]

it does fail in the end...

[pallid mesa]

its engine code, I'm considering a PR

[thin stratus]

Non virtual?

[pallid mesa]

no and its wrapped inside a transient struct

😬

[thin stratus]

lol

RIP

[pallid mesa]

this is one of those changes xD

when i did the pr to set the ownership on Posses many people came to me to say i broke their projects

so if I change this to something that bypasses the controller

i guess the same would happen

xDDD

[real ridge]

guys I have question as usually is there any good hmmm way how I can change my mesh over game ? for example I have red plane I will pick blue pill and my plane will change to another blue bigger plane

so i will switch mesh

it is possible ? 🙂

ofc in MP

so others will see too

[thin stratus]

You'd need a Variable that is Rep Notify

[pallid mesa]

yes you want an OnRep haha

[thin stratus]

Either directly a StaticMesh one

[real ridge]

so its not problem switch mesh okay

[thin stratus]

Or something that identifies which Plane you want

[real ridge]

just replicate it right?

[thin stratus]

Yeah

[real ridge]

okay cool

[thin stratus]

And you use the OnRep function to set the Mesh on the Component

[real ridge]

was scared if there is no problem with it

[real ridge]

yes I will use on rep just when I Will pick that pill

okay aight thx

this discord is like holy bible for christian

lol

[real ridge]

guys I have another question if I run my session and for example destroy something it's destroyed till I don't restart session turn off and make new is there any way how I can restart running session? so i don't need close it and start new .exe?

so match will restart

and everything destroyed will return

[thin stratus]

ServerTravel to the same map again for example

[modest crater]

hey guys, im trying to have my character call the playercontroller and add the HUD widget i made on begin play, my issue is I dont know how to limit it to only do it for people who have a controller but also the listen server player needs too as well because he is returning null for locally controlled, I assume im going about it the wrong way

void AMinion_Character::BeginPlay()
{
    Super::BeginPlay();
    
    MovementComp = Cast<UCharacterMovementComponent>(GetMovementComponent());

    if (APlayerController* PlayerController = Cast<APlayerController>(Controller))
    {
        if (UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem<UEnhancedInputLocalPlayerSubsystem>(PlayerController->GetLocalPlayer()))
        {
            Subsystem->AddMappingContext(InpMappingContext, 0);
        }
    }
    
    if (IsLocallyControlled())
    {    
        if (AMinion_PlayerController* pc = Cast<AMinion_PlayerController>(Controller))
        {
            pc->SpawnHUDWidget(this);
        }
    }
}

[thin stratus]

Your problem is that you use BeginPlay

BeginPlay doesn't mean your Character is possessed

Since you are using C++, your best bet is to use OnRep_Controller

[modest crater]

Yeah, im trying to guard it but its not working right

alright sweet

[thin stratus]

That said

You could also just spawn it in the PC fwiw

But if you already have a working setup, then OnRep should be fine

[real ridge]

only way? or first what u got in mind

[thin stratus]

Easiest way at least

[real ridge]

so after end match just sever travel to same map + use seamless travel ?

right?

ah u are god

[modest crater]

nah OnRep is too early for the UI i cant access the running time at that stage

[thin stratus]

The what

[modest crater]

if i create my ui inside OnRep_Controller its too early for it

ill keep searching aha

[pallid mesa]

@grand kestrel
Hey Vaei, mind fixing this? https://github.com/Vaei/PredictedMovement/blob/main/Source/PredictedMovement/Private/Sprint/SprintMovement.cpp#L44
There's a magic number 0.98f applied there, add a comment or wrap it in a variable so people can understand what that 0.98f is for! Thanks 😄

[grand kestrel]

Woops. Yeah. I'll do it tomorrow though, about to go to bed. I don't remember why I had that number, been there for a long time, but maybe not needed anymore

[thin stratus]

Too early for what exactly? You gotta be more precise. OnRep_Controller is usually totally fine, cause that's when you can be sure that the PC is valid on the Client side and the Pawn is possessed.

[modest crater]

yeah, currently one of the elapsed time widgets is returning null when trying to get the time
matchTimeElapsed = UGameplayStatics::GetGameState(GetWorld())->GetServerWorldTimeSeconds();

its alright ill look somewhere else

[thin stratus]

That's just a race-condition with the GameState not replicating faster than the PC

Just guard the GetGameState return

[modest crater]

OnRep_Controller isnt being called on the listenserver now ahha but yeah the check fixed the other issue

[thin stratus]

OnRep not being called on Server is normal

[modest crater]

well my issue to bein with was that in BeginPlay it would call it on clients but not listen server too

[thin stratus]

So

[modest crater]

I needed it to put the hud on the server player too when respawning

[thin stratus]

You need the Character to be possessed for this. The best way is to:

1. Override PossessedBy and guard for IsLocalPlayerController for ListenServer
2. Override OnRep_Controller for Local Client

[modest crater]

alright thanks

[thin stratus]

And your Timer/GameState issue is because one thing will always replicate before the other. There is no guarantee and UE doesn't give you any "Hey everything is initialized" callback.
So either you guard the GameState in your HUD against being null for the time it's not replicated yet, or you only add the HUD when both Character is Possessed AND BeginPlay has been called.

But then you have to fight the Race Condition in your Character by checking "HasActorBegunPlay" in your OnRep, as well as checking if the Controller is valid on non-Authority in your BeginPlay

Cause BeginPlay on clients only calls if the GameState replicated

[pallid mesa]

@grand kestrel Also https://github.com/Vaei/PredictedMovement/blob/main/Source/PredictedMovement/Public/Stamina/StaminaMovement.h#L166
Why are you inheriting from FNetworkPredictionData_Client_Character_Sprint anything in particular?

[thin stratus]

I assume because it's used together with Sprinting

Like you can Sprint without Stamina

But when Stamina is used they lock it into being used with Sprinting

It's not a "here is how to sync a float in the CMC" example, but more of a "this is how you do sprinting with stamina"

[pallid mesa]

I don't see ties with sprinting in the sample code, just that, that's why I'm asking

Vaei did it quite well and he created a documentation on how to make these work together

But yeah if you skim the source code, you really don't see ties here: https://github.com/Vaei/PredictedMovement/blob/main/Source/PredictedMovement/Private/Stamina/StaminaMovement.cpp

[thin stratus]

I think it's missing a "canSprintInCurrent..." to utilize the stamina?

If it's not being used together, then yeah, the parent is "wrong"

[pallid mesa]

mostly mentions that CalcVelocity is where you'd drain and gain stamina based on cmc state, I imagine bIsSprinting is valid here

[twilit radish]

Vori dismantling the entire project 👀

[pallid mesa]

nono I'm doing a review pass, mostly because it's a community resource

[thin stratus]

I drain in PerformMovement usually

Draining Stamina in CalcVelocity sounds like you are adding side effects to a function that doesn't clearly state that it would do that

[pallid mesa]

can you trust on the bIsSprinting value on PerformMovement?

[thin stratus]

Yop

cause you use Update Before Movement to update it

[pallid mesa]

gut, the justification of CalcVelocity is this:
CalcVelocity stems from PerformMovement and is called from all primary physics loops that have sub-ticks between frames for incredibly high accuracy.

do you agree?

[thin stratus]

No, CalcVelocity should CalcVelocity

Not reduce Stamina

PerformMovement is my choice :D

[pallid mesa]

CalcVelocity calls CalcStamina in his case due to this: PerformMovement should suffice if you have a reason to not update stamina between ticks.

[thin stratus]

So his idea is that during subticks we could stop sprinting

Which I think isn't important

[pallid mesa]

Aham, but still... not invalid, so could work either way

if I got it right, right?

[thin stratus]

Yeah but SubTicks aren't actually visible to the Player

It mostly allows for more precise collision

[pallid mesa]

gotcha, then I believe the explanation given in the docs is on point 👍

[thin stratus]

He basically just reduces Stamina in smaller steps

But only checks stamina after it in Update After Movement

So reducing it once per frame, or 8 times in sub steps doesn't really change anything for me

If you want to make use of the Sub Steps one would also need to check the state in the Subticks

[pallid mesa]

I agree

Its a safer bet to move it to PerformMovement

[thin stratus]

The only thing that could happen is that the SubTicks would stop early due to "something"

But not sure that should affect Stamina

And I think all those "stop subticks" cases are starting a new Physics which hand that new Physics the remaining time

So overall it "should ^tm" always equal to the full DeltaTIme that frame anyway

But this is arguing on very tiny pieces

Both of it works and if he has a comment about it then that's fine I guess

When I coded the custom Hover Movement Component I had boosting also reduce the value in the subticks

But I also checked in those sub ticks if we have to stop boosting

Wasn't pretty I have to say

[pallid mesa]

haha yeah

Ah here it also explains the interop with GAS

SetStamina(...)

but would linking the set stamina with a gameplay effect work?

probably not

i think definitively not XD

[real ridge]

guys I am trying to find this in my unreal for making dynamical healthbars for enemies and allies but I Dont have it in ue5

its a plugin?

[pallid mesa]

thats a component from lyra

i believe

[real ridge]

i need it kek

how to get it

or I need create own component?

[pallid mesa]

no you need to steal it from Lyra project

i think its a C++ component

so you'll have to find the C++ classes for it

or... use Lyra as your base project

[real ridge]

just copy source code u saying?

ah I need download lyra

F

[quartz panther]

sooo, dedicated server doesn't need ?listen at the end of the map url?

[real ridge]

i think yes

i mean yes they dont need

[quartz panther]

oh my god, if things start to work now because of this ...

[real ridge]

and what is your issue?

i use dedicated server so I had a lot of struggles with it

[quartz panther]

my issue is that i see the sessions, but clients fail to join

there is a timeout

[real ridge]

okay so

[grand kestrel]

@pallid mesa @thin stratus when stamina hits 0 sprinting is stopped and regen begins. It can hit 0 between frames this way which might not be pointless for low end PC. Not a big deal either way.

And yeah the stamina is completely agnostic of sprinting, I'll remove the parent

Sleeping now

[real ridge]

1. are you running session on same PC as client? if yes its bad you need use atleast 2 different machines with different ip but can be same network
2. if you have not public IP from your provider then it wont work you need call there and tell them to give you public ip
3. you need set port forwarding on your router for port 7777 +

then it will work

had same issues

@quartz panther

[quartz panther]

ok, so i'm using two different machines, the internet connection is the same, and not sure about the ports.

[real ridge]

ports are must

public ip too

[quartz panther]

so i can see sessions because im on the same internet connection? im using EOS

[real ridge]

you can see session because u are logged to eos and session too it does not depend on what network do you use but if you dont have public ip for network where dedicated server is running it will not allow you as player to join even u find it and same result if you wont have there set right ports + your router need be parent router so provider wont have any routers above you then your ports will works if no you will be getting this error every time u will try to join

i know had same issues

[quartz panther]

ohh yes, this is the same, thank you.

[real ridge]

timeout error and kick

so best you can doo call provider and check your router settings 😄

or maybe try to use some free hosting on aws

and try to run session there they should have settings for it too

[quartz panther]

you mean use aws free machine to host the server

[real ridge]

• btw u need type to cmd ipconfig (where your server is located) and take this address, then make settings on router for port trigerring or virtual server too if you do have this option

[real ridge]

yes , but I never treid it by myself

[real ridge]

ahhh i cant find it

fak

lyra doesnt have it

😦

[pallid mesa]

where is this pic from?

[real ridge]

lyra but i started game and tried find component

but thats not there

F

[pallid mesa]

remove the underscore

if its from lyra it will exist in lyra lol

[real ridge]

okay will try find another system

[pallid mesa]

unless its been renamed

[real ridge]

noone said its from lyra

i checked custom components

it was not there

i try make my own component

[pallid mesa]

I mean if you tell me that this pic is from Lyra...

[real ridge]

idk how

[real ridge]

no no it was from video turtorial 🙂

[pallid mesa]

ah! gotyou

then you have to create the component yourself

[real ridge]

how I can do it ? XD

[pallid mesa]

probably you figured by now

[real ridge]

guys does something like this exists ?

trying to set up dynamical widgets kekw

[real ridge]

I used enum

no need to make own component

[pallid mesa]

🤷‍♂️

[real ridge]

that mfer propably using custom blueprints

[bitter swift]

When using Network Emulation, is there any point in giving the server that emulation? Isn't it only relevant for clients, or am I not understand network correctly?

[thin stratus]

ListenServer might be a laggy boy or girl

[twilit radish]

It’s just an extra option if you need it. The reason to use this is because in a real environment a server can also have a bad connection while clients generally vary a lot. You can use either client, server or both. Doesn’t matter a whole lot.

[thin stratus]

Well BOTH might apply the ping setting twice

[twilit radish]

There’s not much point in both yeah, but it’s possible 😂

[crystal crag]

For gameplay feature components, are you stuck on relying on calling replicated functions inside of the actual PlayerController or PlayerState? I don't think the gameplay feature components themselves support any replication whatsoever.

[thin stratus]

You can replicate stuff in Components

They inherit the same "abilities" as their actors have

[crystal crag]

I'm talking about UControllerComponent for example

[thin stratus]

So a Component on a PlayerController can call Server and Client RPCs

[crystal crag]

Following the inheritance chain, there is no GetLifetimeRepProps() or whatever the method name is to specify replicated properties

RPCs and replicated properties are different and I am now mixing them. So you answered my question that they can at least support RPCs

But they don't appear to support replicated properties

[thin stratus]

Sure they do

[crystal crag]

They do? Would I have to follow the approach of replicating a custom UObject then or am I missing something?

[thin stratus]

It's the same as the Actor version

void UBallCarryComponent::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
{
    Super::GetLifetimeReplicatedProps(OutLifetimeProps);

    DOREPLIFETIME(UBallCarryComponent, HoldBallState);
}

[crystal crag]

oh wait a minute, UGameFrameworkComponent is a UActorComponent

That's weird. No idea how I ended up with they inherited from UObject

[thin stratus]

They do ultimately

[crystal crag]

well, right

But you know what I mean - I somehow thought they didn't inherit from UActorComponent at all

that false information led to my confusion

lol I just had another realization, if they didn't inherit from actor components then you wouldn't be able to add them the way the engine does >< omg I need to stop. I got all turned around somehow.

Someone queue up the homer simpson "DOH" for me

[twilit radish]

https://tenor.com/view/homer-simpson-les-simpson-matt-groening-ouff-non-gif-12807779

[crystal crag]

rofl - thank you

[twilit radish]

😄

[crystal crag]

Ok, well now that I can move on from this, I have one other topic - I want to build a custom targeting component that supports multiplayer. The purpose of the component will be to allow characters to lock on to targets and keep their rotation in sync with the target character. So that leads me to two questions

1. Does anyone have a good resource I could look up covering this, even it explains only high level details
2. Does lyra's aim assist kind of mimic this to a point? I saw something about aim assist but I never figured out how to turn it on.

[kindred widget]

Aiming is always done locally, for the general reason that it would feel like crap to a client otherwise. Which means in general your system would just need a vector or component to interpolate your local ControlRotation towards for a lock on effect.

[crystal crag]

Interesting. That makes sense

What if you want to constrain a player to strafe around a target, but you want them to be able to aim? Wouldn't using the control rotation as the main source to do that prevent them from aiming?

[twilit radish]

I mean well yes, if you lock onto a target you’ll need to change the rotation. Can’t really avoid that 🙂

[crystal crag]

Well maybe I misunderstood what Authaer was saying. Generally the control rotation makes your character's capsule rotate on it's own, which would make the character "lock on"

[twilit radish]

Another way to do it that games often do is by not directly locking on to a target but by providing just aim assist when they shoot. Then you avoid the (in my opinion) annoying lock on a target as well.

[crystal crag]

which that is replicated automatically

Maybe I'm trying to do something that generally just isn't done in most games

I was thinking about what if I want an archer to be able to follow a monster strafing around them but still let them aim for the eyes

without them having to move the mouse left and follow it while moving and aiming

but maybe I'm making that out to be a bigger deal than it is. I guess I have to do that in horizon

and it doesn't bother me

[twilit radish]

I never played the game, so not sure how they exactly do it 😅

[crystal crag]

Well regardless, moving, while aiming with a mouse or controller is not that big of a deal. So I'm building a melee type game. So I was trying to think what if the player wants to change the upper body turn mid swing to hit a specific part of a monster. To allow them to over correct I guess.

[kindred widget]

There's also a large debate over whether aim assist should be used on PC. Definitely make an option for it at least for PC. Consoles are a little more relaxed about aim assists.

[crystal crag]

Well my game is PvE

Yeah aim assist is a much bigger controversy over PvP games

Still can be for PvE I suppose

[kindred widget]

Negative review incoming -
"Fk ths shit game moving my mouse when i dont want it to i did NOT aim there and it keeps moving my shots and i cant even turn this crap off!!!"

[thin stratus]

My wife played Mafia on PC but streamed to our Living Room TV with Gamepad.
Aim Assist was very welcome.

I more or less quit The Last of Us over having to aim a gun with a gamepad

[kindred widget]

Oh I love it. 😄 Specially on games like Just Cause. It's nice when your enemies are tiny little dots. But people will still complain about it. Because people.

Just one of those random PR nightmares that can easily be avoided with an if statement and a checkbox.

[crystal crag]

lol that's a good point

Well I would think for melee-centric games you would want lock on

nothing feels more annoying then you swinging and missing because the monster moved just a little out of the way

I might be trying to do too much with just one component too. I was originally thinking that I would use this component to check whether the player could target a certain component (basically, all enemies would have this component too) and then I could feed that into a notification system for the enemies if they were being targeted or notify the player if an enemy was targeting them, etc.

But if I am going to use just client-side to control the control rotation, then having the target replicated on the component no longer makes sense, because the client is the authority on what it is targeting

Then this method no longer makes sense

protected:

    UFUNCTION(BlueprintNativeEvent)
    bool CanBeTargeted(const FGameplayTagContainer& ContextTags, const AActor* InInstigator) const;

Well, I suppose I could have replicated data and then locally check. I'm not controlling whether damage can be applied through this or anything, so if someone cheats it locally then all they would be doing is targeting something they can't interact with

sathenzar now realizes he is rambling about specifics and no one else can read his mind and know what he is trying to achieve, making all of his thoughts go into the void

[south crest]

what would cause NetLoadOnClient to work, but the objects appear at 0,0,0?

[short arrow]

I'm pretty sure actors don't update locations to clients and such by themselves

character locations are updated automatically because of cmc

but other actors need to be told a different way where they should be for clients

from my experience anyway

[real ridge]

guys is reset level functioning for mp?

Also I have still no ide how to make dynamical healthbars I tried give players variable what team they are and then send their team to widget and compare it and if it's enemy set it red or green but it works not correctly how to make bars like I can see it red if it's enemy but also as green in same time if it's friend 😦

[thin stratus]

Hm, sounds pretty strange. Not sure why that would happen. Does that go for all Actors or just a specific one?

[south crest]

interesting thx

[south crest]

happens with all my non character actors it seems

[thin stratus]

Are you spawning them at a specific location?

How are they spawned to begin with

[south crest]

dynamically spawned by a character

using Spawn Actor by Class

any character can spawn an object like tree or chest, they do net load on client properly, but all of their locations are 0,0,0

am i supposed to have the server put the dynamic objects into a save game state and replicate that to clients or something?

it seems like replicate + netload should do it though...

[thin stratus]

NetLoadOnClient shouldn't affect runtime spawned actors though?

@south crest

Like that's usually for already placed actors and if the Client should load them from the disk or wait for the actor to be spawned through replication

[twilit radish]

Ok so my thoughts weren't wrong on that xD
I think the issue is that you're trying to spawn them on the client maybe?

any character can spawn an object like tree or chest
Does not work if the server doesn't spawn the actual replicated actors as clients do not have the authority to do this.

[south crest]

i did use the server to spawn them (client calls RunOnServer nodes for spawning stuff at runtime) but even if i spawn them from the listen server, same problem

[twilit radish]

Show your setup 😄

[twilit radish]

Have you checked to see what "Location In Range" returns on the server?

[south crest]

selects a location in front of them a bit

the actor spawns there correctly

[twilit radish]

So it appears correctly on the server but not on the clients?

[south crest]

spawning at runtime appears correctly for all players connected (listen & other clients) but then a new client joins and sees all those spawned actors at 0,0,0

this is when connecting from a separate computer over LAN running in Standalone

(tried to test "real world")

[real ridge]

guys sorry for spamming anyone can help me with dynamical health bars? 😦 so allies will see me as green health bar and enemies as red I am lost

i have 1 widget and trying compare teams inside it and set color but it's hard idk why it's not working

[twilit radish]

Is tis a custom spawn actor node?

[south crest]

No, built in

[twilit radish]

Maybe it's me, but spawn actor does not have things like "Vendor" etc. to my knowledge 🤔

[south crest]

hehe, its just when you plug in the class

the class has "show in editor" on some vars

here it is dont judge 😄

big bogus bugs

[twilit radish]

There's also nothing in your logs?

[south crest]

no

[ionic turret]

Hello guys, even for multiplayer resources i need to post in the other channel?

[prisma snow]

I'd recommend using the pinned resources, specially the two compendiums

[grand kestrel]

So yeah I don't remember where that sizesq/.98f thing originated from, I think there was something it had to fix like, years ago, and I kept it without thinking about it because it didn't cause issues either. I've replaced that now with

bool USprintMovement::IsSprintingAtSpeed() const
{
    if (!IsSprinting())
    {
        return false;
    }
    const float MaxSpeedWalk = IsCrouching() ? MaxWalkSpeedCrouched : MaxWalkSpeed;
    const float Speed = IsMovingOnGround() ? Velocity.Size() : Velocity.Size2D();
    return Speed >= MaxSpeedWalk;
}

Maybe it should be > instead of >= 😄

[ionic turret]

where?

[prisma snow]

pinned here

discord has pinned messages

[pallid mesa]

i believe the second ternary is reversed

when on air you'd like to compute 3-dimensional velocity

while on ground u can go for the simpler

[grand kestrel]

Nope

On ground you want to factor the total velocity

You don't factor fall velocity for sprinting exceeding max walk speed

Using 3D velocity on ground is because moving up hill could slow you down

[pallid mesa]

ah for sprinting! ahá! got you, wrap it in a comment cause it looks like a bug at first

[grand kestrel]

Fair 😄

[pallid mesa]

I think the 0.98f is merely to reduce the comparing factor

so shall be expressed as a percentage

so it looks like an empirically set magic number, so you might need that

but looks like a feature anyways

[grand kestrel]

Yeah I don't remember what it is 😄

I'll change it, then see if it works as expected in my own project, if it does I'll commit it

[pallid mesa]

also vaei could you do some diggin on its interoperability with gameplay attributes?

so stamina could be mutated with gameplay effects and such
or is that an open research topic?

[grand kestrel]

My time is too limited for that unfortunately

[pallid mesa]

okay! perfect!! Excelent just wanted to know

[grand kestrel]

I remember now. When the character gets slowed down by anything at all, he gets bumped out of sprinting state if he falls even a little below max walk speed, I think it caused some re-entry issues. I'll leave it in but expose as parameter.

I will improve that velocity check like I did above, though

bool USprintMovement::IsSprintingAtSpeed() const
{
    if (!IsSprinting())
    {
        return false;
    }

    // When moving on ground we want to factor moving uphill or downhill so variations in terrain
    // aren't culled from the check. When falling, we don't want to factor fall velocity, only lateral
    const float Vel = IsMovingOnGround() ? Velocity.SizeSquared() : Velocity.SizeSquared2D();
    const float MaxWalkSpeed = IsCrouching() ? MaxWalkSpeedCrouched : MaxWalkSpeed;

    // When struggling to surpass walk speed, which can occur with heavy rotation and low acceleration, we
    // mitigate the check so there isn't a constant re-entry that can occur as an edge case
    return Vel >= (MaxWalkSpeed * MaxWalkSpeed * VelocityCheckMitigatorSprinting);
}

    /**
     * When struggling to surpass walk speed, which can occur with heavy rotation and low acceleration, we
     * mitigate the check so there isn't a constant re-entry that can occur as an edge case.
     * This can optionally be used inversely, to require you to considerably exceed MaxSpeedWalking before sprinting
     * will actually take effect.
     */
    UPROPERTY(Category="Character Movement: Walking", AdvancedDisplay, EditAnywhere, BlueprintReadWrite, meta=(ClampMin="0", UIMin="0"))
    float VelocityCheckMitigatorSprinting;

@pallid mesa

[pallid mesa]

good 👍

[grand kestrel]

@thin stratus on the topic of CalcVelocity vs PerformMovement; if stamina is fully drained between ticks, and the stamina is used for sprinting, that affects all movement properties (acceleration, braking, friction, speed) and they are definitely applied between ticks. When low frame rates come into play it would actually extend the amount of time you can sprint. It may not be seen, but may be felt. I might offer it as a choice in the readme/comments instead of telling them to use CalcVelocity if you're still sure it's not correct

[twilit radish]

Just try it out, Unreal can limit your FPS 👀

[thin stratus]

But iirc, unless you changed something, you aren't stopping sprinting during those subticks

So even if e.g. 5 out of 8 ticks already are at 0 stamina, you'd only stop after the full perform movement is through?

Maybe I didn't see you handling that

[grand kestrel]

It does stop during those subticks because it has bStaminDrained

    /*
     * Drain state entry and exit is handled here. Drain state is used to prevent rapid re-entry of sprinting or other
     * such abilities before sufficient stamina has regenerated. However, in the default implementation, 100%
     * stamina must be regenerated. Consider overriding this and changing FMath::IsNearlyEqual(Stamina, MaxStamina)
     * to FMath::IsNearlyEqual(Stamina, MaxStamina * 0.1f) to require 10% regeneration (or change the 0.1f to your
     * desired value) in the else-if scope in the function body.
     */
    virtual void OnStaminaChanged(float PrevValue, float NewValue)
    {
        if (FMath::IsNearlyZero(Stamina))
        {
            Stamina = 0.f;
            if (!bStaminaDrained)
            {
                SetStaminaDrained(true);
            }
        }
        // eg. FMath::IsNearlyEqual(Stamina, MaxStamina * 0.1f) to require 10% regeneration
        else if (FMath::IsNearlyEqual(Stamina, MaxStamina))
        {
            // If you want to add a percentage, whether its 10% or otherwise, you will need to multiply MaxStamina here
            // eg. Stamina = MaxStamina * 0.1f;
            Stamina = MaxStamina;
            if (bStaminaDrained)
            {
                SetStaminaDrained(false);
            }
        }
    }

[thin stratus]

I didn't see that in your GitHub code

[grand kestrel]

I've added the comments since

I'm updating a lot of stuff now

(It is there, just not well documented at that time) 😄

[thin stratus]

But Isn't it in the StaminaMovement?

[grand kestrel]

It is

[thin stratus]

Ah

You implement in the header

How dare you

:D

[real ridge]

i have no idea why but every time I join session on my dedicated server my player state is empty even I am setting there variables after begin play on that map.... I dont f understand it

in editor its alright

again problem with teams.....

[thin stratus]

I would honestly not mix implementations in header and cpp

It's hard to follow your code like this

It's already tricky due to movement being in multiple classes and using Private/Public folders

[grand kestrel]

I'll move it then 😄

[thin stratus]

Where exatly are you calling UnSprint when stamina is drained?

[grand kestrel]

I'm not, once stamina is drained, it'll just start sprinting again, UnSprint is only input handling

If someone wants to remove the input they can do that manually by overriding OnStaminaDrained

Btw the code there is a little outdated, let me finish what I'm doing then I'll push 😄

[thin stratus]

Well all I'm triyng to understand is where you actually stop sprinting in subticks

[verbal tendon]

This 300%

Unless it is a single line return statement for a getter, it goes into the source file, not the header

The header is there to give an overview of the class. So I want to look at 20-50 lines of code to know what is going on

By putting in logic you make that a very hard thing to do, make your code less readable and maintainable

just don't do it

[grand kestrel]

It's not on the github, because it requires interop between stamina and sprint classes, I override CanSprintInCurrentState and return !IsStaminaDrained

bool ULCharacterMovement::CanSprintInCurrentState() const
{
    if (!LocoCharacter)
    {
        return false;
    }

    if (LocoCharacter->bIsRagdoll)
    {
        return false;
    }

    if (IsSliding())
    {
        return false;
    }

    if (IsStaminaDrained())
    {
        return false;
    }
    
    return Super::CanSprintInCurrentState();
}

[thin stratus]

And you are checking CanSprintInCurrentState where in your local changes?

[grand kestrel]

UpdateCharacterStateBeforeMovement / UpdateCharacterStateAfterMovement

[thin stratus]

Right, but that's not called in subtick

Only in PerformMovement. So it would still go through all ticks before stopping to Sprint

[grand kestrel]

Hmm true enough

[thin stratus]

Even if the first subtick sets drained to true

Which was my whole point for it making no difference :<

[grand kestrel]

Alright, we'll use PerformMovement 😄

[thin stratus]

haha

I mean you can check in CalcVelocity too

That function is just a bit overloaded at that point

[grand kestrel]

Yeah. But at this point it will get convoluted

Yep

[thin stratus]

Also, fwiw, After and Before Movement can't both cover your Stop Sprinting in the same frame

Cause you call Super::PerformMovement either before or after your code

And it contains both Before and AfterMovement calls

I only use Before Movement

Not sure if that makes sense though

[grand kestrel]

I think at that point I was just copying crouch handling

From engine

[thin stratus]

Yeah I know, just that crouch is handled in between those two events

hmmmmmmm

I mean

One could use StartNewPhysics

[grand kestrel]

Yyyeeppp

[thin stratus]

Also depends on the game at this point

If Sprinting can only be done while walking it could also sit in PhysWalking

.>

It#s hard to make something usable for everyone. I would have gone for "here is an example, now make your own"

But it's good that there is a repo with stuff now

Then I don't need to copy paste half my project

[grand kestrel]

I don't see anywhere else it checks crouch between frames?

[grand kestrel]

...If only there was a common point between them all... perhaps CalcVelocity

😄

[thin stratus]

If only CalcVelocity would not be the only point

[grand kestrel]

Which am I missing

[thin stratus]

No but since the native code has crouching build in, stuff inside of PerformMovement can alter the state

But if you override PerformMovement, you can only call it before or after Super

(your Stamina code)

[grand kestrel]

Oh, right

[thin stratus]

So between UpdateCharacterStateBeforeMovement And AfterMovement, nothing will alter the stamina. Maybe move it to StartNewPhysics then I guess

Not sure

Doesn't really matter i guess

I had no issues handling it only in BeforeMovement

[grand kestrel]

So just call this from OnStaminaDrained

        if (IsSprinting())
        {
            UnSprint(false);
        }

And keep CalcStamina in CalcVelocity

That should probably do it

[thin stratus]

Or that, yeah

[grand kestrel]

@thin stratus@pallid mesa

### 1.0.1.0
* Removed stamina inheritance from sprint
* Fixed CanSprint() being used unnecessarily, CanSprintInCurrentState is utilized properly here
* Moved sprint input checking to virtual func `IsSprintWithinAllowableInputAngle`
* Sprint checks 3D velocity on ground, replaced magic number with UPROPERTY `VelocityCheckMitigatorSprinting`
* Moved implementations out of headers
* Greatly improved comments

Thanks for the feedback. Submitted this. Have to do paid work so it'll be a few hours before I can make further changes

@thin stratus I think it might be worth making a branch or fork, with it integrated into third person template + BP. I'll do it in the evening

Then it can be a proper learning resource

[thin stratus]

Cheers, It's almost 11PM here, so I will be sleeping soon and then I have to work tomorrow anyway, so won't be commenting for a while

[grand kestrel]

All good 😄

@pallid mesa ^ btw

If nothing else, it would also be helpful to see the intended implementation, for most people

[dense cape]

This might be a very stupid question, but before I start diving into setting my project up using it...
Do Control Rig / Full Body IK animated Actors work properly with multiplayer out of the box?

[real ridge]

lol u are from my country ?

u have same time as me 😄

[thin stratus]

Timezones exist (:

[real ridge]

guys someone smart can help me with dynamic health bars ? I am out of mind

[real ridge]

but u from EU

prolly

central eu

[thin stratus]

Yeah Germany

[real ridge]

wunderbar

Ich bin kamil

XD

[thin stratus]

We still stick to English here though please (:

[real ridge]

ah such nice language

my mom is lector of deutsch

[thin stratus]

I assume it's the same as with anim BPs, so that those system don't have any direct multiplayer implementation cause they are driven by values that can be replicated elsewhere (e.g. Character)

[real ridge]

anyways guys I have Team ids every player has set team and I am passing self to my widget with health bar there I am checking "self" which I sent with local player if teams are same then i set color green if different then Red but I have still not working it is there any easy solution? lol every mp game has ally and enemy health bars and I cant find anything about it in UE

😦

[dense cape]

Makes perfect sense. I just didn't want to assume.

[red pollen]

Hello there. I am trying to use GAS to add a replicated sprint ability to the Third person template, figured it would be a good place to start learning more about multiplayer shit.
I have it locally sending through to my Ability System Component when I press my Left Shift, with logs on the client, server and IDE which is all fine.
Just need to get the logic down from here I think. The GAS Shooter uses a movement child class to override the GetMaxSpeed function, I know it sounds like such an odd question but do I also have to go through this route, baring in mind I'm starting out with the Third person template?

I'm looking at their other abilities, like the Gun fire, or the Jump. Jump uses the normal character class, and Gun fire is all right there in the script.
I just wanna make sure it is actually replicated properly. Has anybody tried adding a sprint before?

[karmic jacinth]

It seems like my Construction Script is unaffected by my replicated variable. Should I move the construct part to the Begin Play or is there a way to make it work?

[fossil spoke]

@red pollen We have a #gameplay-ability-system channel for GAS questions.

There was also a recent Pinned Message in this channel that links to an example of implementing Sprint in the CMC.

[grand kestrel]

I'll have a ThirdPersonTemplate example project up in the next few hours showing exactly how to use it too 🙂

[karmic jacinth]

I can answer that question here as it is more of a CMC question than a GAS one. Changing the GetMaxSpeed method is simply the best way to do it in a way that does not break the prediction since the result of GetMaxSpeed() is a safe method.

[grand kestrel]

The sprint boolean still needs to be predicted

[red pollen]

Lovely. Just wanted to make sure I was on the right path. Ty buddy! 😄

[real ridge]

how I can achieve something like this 1 widget but set for enemies as red and for ally as green?

i can't find any solution and mine not working

[prisma snow]

Usually you'll have some data about teams or some way to tell whether something is allied or enemy. Then, you pass that data into the widget or whatever element uses it, and react accordingly

[kindred widget]

You said earlier that you had your Team property in the characters. Do what I said earlier. Start with something like this. It's not performant, but you're using WidgetComponents anyhow so performance isn't a concern yet. Team should probably be on the playerstate, but that introduces more complications. If your team is on the character, this will work for you for now.

[glacial pollen]

When I possess a vehicle in multiplayer, distance culling seems broken. I have a long line of cars, and I start at one end, and drive to the other, but "at the end of the line" I'm hitting invisible cars that didn't load in.

I've verified that the server and client both agree on the vehicles location.
(The 2nd player is just standing on the car, which is what is causing the hitching so ignore that. The culling issue happens without the 2nd player too)

[deep shore]

I have a dedicated server up and running, and thankfully everything seems to be working great. I’m wondering just how high I can push the maximum player count per match…Are there profiling tools I can use to see if my game is capable of jumping from 20 players to 30 or 40?

[fossil spoke]

Unreal Insights is a good place to start.

There is also the Network Profiler tool.

[deep shore]

thank you. I know it’s tough to make generalizations with this sort of thing when there’s so many variables at play. but does raising the player count like this typically put a lot of additional stress on clients, or should the performance of the server itself be the main concern?

[grand kestrel]

@thin stratus @pallid mesa
When you guys are back on, the example project is done, I'll edit it in my pinned post too I'll add it to the plugin's readme
https://github.com/Vaei/PredictedMovementExample

For anyone else; this is a third person template with net predicted prone, sprinting, stamina, and strafing.

[fossil spoke]

To answer that question, you should profile your game. Profiling will literally tell you where you need to focus your energy. Especially if you don't know yet what you should be focusing on (typically because you are new or inexperienced in gamedev). Start with the things that are costing you the most in performance, knock them down a few pegs (you may need to refactor a few times before you can realize a solution that saves you majorly in performance, this is not unusual), then go back to the top of the list and start on another heavy hitting area.

If your Client is running at really low frame rates, profile the Client and see why, fix that until the Client can reach a stable 60FPS (or some other satisfactory target).

Then look at your Server, see what network traffic/bandwidth you can optimize. Usually more importantly, pay close attention to ensuring the Server is well optimized for CPU time.

The less time the Server is spending on CPU cycles, the more connections/players it could theoretically handle.

Constantly profile.

You cannot know what you need to tackle without first understanding what is costing you.

Understanding what is costing you, starts with profiling.

Make sure you keep old Profiles that are significant, or compile data that you can reference to from previous profiling so that you can compare your efforts to make sure you are actually making gains instead of just shifting the performance cost elsewhere.

[deep shore]

thank you so much for that. I’ll take this advice and run with it. Time to brush up on Unreal Insights. 👍

[fossil spoke]

When profiling, try as best you can to be consistent in the test scenario. There is little point to comparing profiles of wildly different sessions. You would have little point of reference.

[vivid egret]

Hey friends, my host is retrieving different values from game state than my clients, any ideas why this would happen? Specifically, I have a number on screen that increments every 20 seconds. Well the first time the number increments, the host does not, however the clients do. I am storing this incrementor in the game state so all clients can access this. I am casting from the widget to the player, inside the player is running a custom event on server that casts to the game state, and then the game state increments. It worked fine earlier today but I have spent hours now trying to figure out what is going on.

Thanks for any suggestions in advance!

[twilit radish]

Show your setup 🙂

[twilit radish]

Also a good point to note with this in my opinion is that if you can't easily get it to be similar enough is that there's no shame in setting up a test case. I was messing around the other day with the character system for example to see its network impact between a change I made and the original but it was absolutely impossible to profile without using a specific test setup because the internal variables kept changing too much for my scenario. But definitely depends™️.

[dark edge]

Casting is not communication.
Show your code

[wooden abyss]

Hello, I have a Question regarding PlayerStates. I have this Overlay Widget that shows all the connected Players and their respective scores. In the Screenshot most right number next to the player name is the score. The score is saved in the player state and there is an Event that belongs to the Gamemode which increases the score when it is fired. Works fine so far. Now I wanted to save references to the PlayerStates in every connected Controller so that each Client can show the score of each Player on their own. Cause I thought the PlayerState exists on the client as well and is replicated. Now I can save the reference but only PlayerState on the Server gets updated (score increases) while the PlayerStates on the client never get updated. Maybe I didnt understand something about PlayerStates but I dont understand why they dont update the score. Is there anything I'm missing here? How can I make sure that my clients have the most up-to-date PlayerState infos?

[twilit radish]

Is your score set to replicate? Also yes all player states are available for all players, controllers however are not. Also FYI gamestate already has an array with all the playerstates.

[wooden abyss]

Do I have to set a variable that is meant to replicate from the PlayerState specifically to replicate as well? I was thinking it would be replicated because the PlayerState is already replicating

[twilit radish]

Considering Unreal does not support multiple game worlds it has to be a physical location in your world. I’m not entirely familiar with how to do this though but perhaps that the Level Streaming system has something to offer for your case? 🙂

[twilit radish]

You need to specifically mark variables to replicate yes. Otherwise everything would and that would be a problem 🙂

[agile loom]

There is a score variable in the player state by default that you can use and is replicated as well

[wooden abyss]

Alright thank you!

[wooden abyss]

Thanks!

[twilit radish]

Set score is not a UFUNCTION btw. So if this is for blueprints that won’t work, but depends™️ I guess.

[wooden abyss]

Hm.... So it does work now after setting the score to replicate as well but it is quite slow for the client. I was using the term score to simplify my problem. It is actually the Currency a player gains when killing enemies. This is all handled by the Gamemode and doesnt update fast enough for the clients so their total amount of gold lacks behind. Are there better ways of doing this if I want to have some variables update faster?

Or is it feasible to have the value update locally and then communicate with the gamemode to check if the value is correct?

[twilit radish]

PlayerState has a pretty low update frequency by default I believe. You could just set it higher so it will try to more often replicate.

[wooden abyss]

So I would prevent that "lagging"?

Ah ok

[thin stratus]

Or you call ForceNetUpdate on the PlayerState

[wooden abyss]

I saw the replication frequency values but didnt want to deal with those yet as I dont know the impact changes to those would have 😅

Gotta read up on ForceNetUpdate I guess 😄

Oh so it just forces the replication on the next frame?

ForceNetUpdate works perfectly. I think I prefer this so I can force it to update only in specific scenarios/events rather than just cranking up the replication frequency

[twilit radish]

Kind of. It forces the specific actor to be immediately considered for replication but Unreal does not guarantee immediate replication for anything. But it will basically be ASAP.

[wooden abyss]

It's a pretty basic game with not many entities to actually replicate so I guess this should be fine for my case

[twilit radish]

Also the whole frequency system sucks IMO. It's impossible to get it right as it depends on way too many factors. Unreal has a dynamic system you can toggle in which it will increase/decrease based upon how actively it's replicating stuff. But I have not tried it my self yet, but it sounds a whole lot better than either forgetting about it for actors or not knowing what values are "correct".

https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/Networking/Actors/Properties/#adaptivenetworkupdatefrequency

Just posting it if you or someone else is interested 😄

[wooden abyss]

Thanks for the help and all the info @thin stratus and @twilit radish. I'm completely new to this and some things are really hard to understand for me 😅 Really appreciate it!

Definitly interested. I dont JUST want it to work but also understand why 😂

[twilit radish]

It explains it on the page how it works.

(Advanced) Update Frequency Decrease Algorithm
During update attempts, Actors determine how long it has been since the most recent meaningful update was sent, and record the new time if they send a meaningful update. If an Actor being considered for update has not sent a meaningful update for more than two seconds, it will start decreasing its update frequency, reaching its minimum frequency after seven seconds without a meaningful update. For example, if an Actor with an update delay between 0.1 and 0.6 seconds had no meaningful updates for 3 seconds, it would attempt its next update in 0.2 seconds.

(Advanced) Update Frequency Increase Algorithm
After sending a meaningful update, an Actor will schedule its next update to happen in 30-percent less time than the time between the last two meaningful updates, clamped between the minimum and maximum update frequencies. For example, if an Actor went exactly one second between meaningful updates, it would schedule its next update attempt for 0.7 seconds in the future (or a time near the specified minimum and maximum update frequencies). With each successive meaningful update, this calculation will be repeated, quickly reducing the time between updates if an Actor starts to have frequent data or subobject changes.

[wooden abyss]

Oh I see

[twilit radish]

Alright nevermind, this is still not what I'm looking for honestly. So it does dynamically change the frequency but it's still based on the initial actor frequency. It would have been really nice if it was fully dynamic 😦

[real ridge]

can I tell my game mode to random spawn collectibles on map?

in some random time squences?

or where to put this logic

[winged badger]

Subsystem or component on a gamd mode is fine

Dont clutter gm itself

[odd sundial]

Sorry, I know, very old question but we implemented motion warping in our multiplayer game and it worked great right out of the box

[cedar swift]

No problem, I'm glad to know it worked well for you. I adjusted mine to suit my specific needs, but it seems pretty good out of the box after 5.1

[odd sundial]

Oddly enough we're using 5.0.3 and no issues... shrug glad to hear you solved your issues!

[red pollen]

I have a bit of a multiplayer theory question.
Getting to grips with a rollback hit detection system where the server checks the state of the game when the player fires a shot, swings a sword etc. However, what happens when the player has high latency? For example, a lag spike or lag switch, where it would look legit if they lag, turn a corner and shoot at somebody then head back behind the corner? Should there be a latency cut off of sorts?

If anybody could point me to some docs or vids on the above that would be ideal.

[pallid mesa]

read here https://vorixo.github.io/devtricks/simple-rewinding/

[red pollen]

Cheers will take a look.

[snow quarry]

Does anyone know how to fade out a wall for just one clients character who walks behind it? I can fade out a wall fine, but every client in the area can see it.

[bitter swift]

Does anyone have experience with the Physics Control plugin, and if it's possible to replicate? So far, I'm unsuccessful in making it work in multiplayer. It seems that the functionality for the physics control is based on properties that aren't replicated.

[vivid egret]

Is it possible to cast to all the characters from the gamestate? For example, I have a time set up in my gamestate that all the players are getting. When the time gets to 5 minutes (time in minutes > 4), I want to run custom event (in ThirdPersonChar_BP) on all the players to change from Interface 1 to Interface 2. I know I can cast to gamestate from player, but how would I cast to ALL the players from gamestate?

My alternative is to set a "interface change" boolean in the gamestate, and have the characters run a branch on event tick until it sees that variable change. I dont want to use tick if possible.

[edgy patio]

You could use a Multicast RPC.
Or you could make an delegate in the gamestate that will be called after 5 minutes. Each player, after initialization or beginplay could bind the ChangeInterface method to the gamestate delegate

[real ridge]

if I decide to spawn player by myself where is best place to do it in game mode? or in player controller and rpc it?

bcs I want use optional spawn points

[vivid egret]

Not familiar with delegates, ill look into this! Multicast seems to be a good option.

So from GameState, when the timer hits 5 minutes, I would run a [CustomEventMulticast] -> [Cast to 3rdPersonChar_BP] -> [ChangeInterface]

[vivid egret]

I would think in Player Controller because GameMode is only accessible by the server, so your clients wouldnt be able to interact with it to spawn. But I am no expert

[edgy patio]

Are you using blueprint or c++?
In C++ it's called delegate, in blueprint it's event dispatcher.

I think the option 2 would be better, because isn't the responsibility of the gamestate handle something for the character.
It would be better to have this delegate/dispatch because the gamestate would call for everyone who is listening. Without knowing who it is (in this case, the gamestate doesn't need to know nothing about the 3rdPersonChar)

Delegate/Dispatcher usually is compared as using twitter.
Using this metaphor, when the game start, who is interested in this event in the gamestate should "follow" (bind) it.
So when the gamestate state call that event, everyone who is following / listening, will get a notification (in your case, will change the interface)

[vivid egret]

yeah blueprints, this is interesting. I will look into using the dispatcher

[real ridge]

guys I did custom spawning and suddenly my whole ui for played dissapeared lo

lol

do you have idea why?

his name team etc

[grand kestrel]

Where is your UI created

@thin stratus when you got a moment, can you confirm for me that this is correct? Not having any issues just double checking it. Doesn't compare stamina float but does compare drained bool

bool FSavedMove_Character_Stamina::CanCombineWith(const FSavedMovePtr& NewMove, ACharacter* InCharacter,
    float MaxDelta) const
{
    const TSharedPtr<FSavedMove_Character_Stamina>& SavedMove = StaticCastSharedPtr<FSavedMove_Character_Stamina>(NewMove);

    if (bStaminaDrained != SavedMove->bStaminaDrained)
    {
        return false;
    }

    return Super::CanCombineWith(NewMove, InCharacter, MaxDelta);
}

[real ridge]

in pawn blueprint after begin play

timer is in game state replicated for all

[grand kestrel]

And are you calling IsLocallyControlled before creating it? Because if so, it probably doesn't have a player controller possessing it yet. BeginPlay is usually the wrong place. Grab LyraStarterGame and look at how it initializes in their BP.

You can grab the plugins and code they use

[real ridge]

where in general then initialize widgets

[grand kestrel]

IsLocallyControlled will always return false if there is no playercontroller possessing, and its common that BeginPlay on pawn is called before replication occurs

[young blaze]

Multiplayer noob here, so apologies if this is super basic:

I'm connecting a bit of UI that uses data in my PlayerState. But: In the player controller on the client, my PlayerState is null /None at BeginPlay. It looks like I can add (in C++ only) an OnRep function in my playercontroller to detect when the State gets replicated for the first time, but it feels odd that I'd have to do that for something that's in the gameplay framework.

Is this expected? Is there another built in way to know when PlayerState will be ready?

[grand kestrel]

BeginPlay isn't a safe place for anything to check against the PlayerController

[real ridge]

but when I try run it as listen server i dont see any ui too

[grand kestrel]

Its expected, nearly the same issue as Laos

[grand kestrel]

BeginPlay can still happen before Possess happens

[real ridge]

and yes I do ask it

before creating

[grand kestrel]

Then that's why it doesn't work

That's always false before possessed

[real ridge]

i printed it possesing is after it

[grand kestrel]

You (and epigraph) need to look at the OnRep_Controller and OnRep_PlayerState functions in C++, that should do it for non-authority, for authority you'll need to use possess for playercontroller, and wherever playerstate gets set

[real ridge]

okay i will but print says possesin is not happeing before

anyways

if I use default pawn as my pawn and not none

its working

when i set it none

its not working

and ui missing

• my bad its not working neither now lol

only for client not for listen server

[young blaze]

Okay - I'll poke at Lyra and see how they use the OnReps. Thanks!

[grand kestrel]

Check LyraPawnExtComponent::IsPawnReadyToInitialize

You can build your own based on their code and using the modulargameplayactors plugin they use

[real ridge]

just quick question if I have custom spawning in game mode and I use default class for pawn as my pawn and not none ,(only for short time of testing) will it break something? bcs I need that Ui

i dont have time to steal now code from lyra

will do it later

just thought I have to use none when I spawn by myself

[grand kestrel]

For now just test by chucking in a long delay after beginplay

Do like a 3s delay and see if you get a UI after that delay

[real ridge]

3sec delay works

[grand kestrel]

OK so you don't have a possessing controller, the 3s delay gives it enough time

[real ridge]

why then posses print was printed before ui print wtf

[grand kestrel]

Shrug

Its a common issue

[real ridge]

even 1 sec is enough

[grand kestrel]

3s delay isn't a solution either, if someone's taking longer to load then they end up with no UI

Latency, poor network conditions, etc all cause that

If you really want to cheat for a quick and dirty solution make a loop using timers, let me show you, one moment

[real ridge]

hmmm

u mean workaround?

I am thinking if delay is ok for now

it works...works

right way is that one which lyra used right?

even 0.5 sec is ok but i dont want to have that short for sure

[grand kestrel]

OK, yeah, for now

I'd go as high as you're OK with going because if someone has an issue they'll end up with no UI

[real ridge]

it looks bad but what to do....

so best solution is lyra way? its immediately load?

after checking its valid?

cant I just somehow check if I am possesed and then initialize ui?

[grand kestrel]

You can override OnRep_Controller and PossessedBy then expose to blueprint

Both come from the Pawn class

The OnRep will cover clients and PossessedBy will cover listen server

[thin stratus]

Hm I think it's correct. The idea here is to only allow moves to combine that can

Sprinting for one frame after another for 16ms each or once for 32ms should not make a difference

But if you would sprint in frame 1 but not in frame 2, then it would matter, because you can't distinguish between which of two frames/moves stopped/strated the sprint

[real ridge]

i just need client side

thanks 🙂

my server side is dedicated server

cast from player controller to player state ? is allowed by god ?

[grand kestrel]

No

They're different classes

[thin stratus]

Usually the "WantsToSprint" stuff is already taken care of via the flags. They are compared in the super call iirc.

So if bStaminaDrained logically prevents 2 moves from being merged, then yes, this is correct

[grand kestrel]

You have OnRep_PlayerState tho

[grand kestrel]

Thanks, that makes sense to me too

[thin stratus]

I thiiiink I'm also storing if I am sprinting at all

But that might be the same as stamina drained, not sure

Cause if you stop sprinting due to no stamina, then that would be important for not combining I think

But it might also be that it's super wrong. Best bet is to set fps to > 60 and then trying it and seeing if you get a correction when stamina is drained

Maybe it's redundant

[grand kestrel]

I run 120fps most of the time and never any correction so must be OK 😄

[thin stratus]

Everything over 60 causes combined moves by default so yeah

[thin stratus]

You'd also not notice bugs by not combining

You need to test without the bStaminaDrained stopping combining

You only get problems if you combine in a situation where you shouldn't