{
Super::OnPossess(aPawn);
AHVS_Character* MyCharacter = Cast<AHVS_Character>(aPawn);
if (HasAuthority() && MyCharacter)
{
check(PlayerCharacter->HeroWeaponClass);
PlayerCharacter->CharacterWeapon = GetWorld()->SpawnActor<AWeaponBase>(PlayerCharacter->HeroWeaponClass, PlayerCharacter->GetActorLocation(), PlayerCharacter->GetActorRotation());
PlayerCharacter->CharacterWeapon->Character = PlayerCharacter;
PlayerCharacter->CharacterWeapon->AttachToPlayer();
}
if (MyCharacter)
{
Client_SpawnInGameUI(MyCharacter);
}
}```#multiplayer
quick flint
once i call Client_SpawnInGameUI()
MyCharacter is nullptr
in that rpc
any idea why?
kindred widget
@quick flint Not an expert, but initially the only reason I could see that it should be null in the client after that RPC, would be if it's somehow not replicated in the client yet. Or not replicated at all.
It might be likely that OnPossess on the server is called and that RPC sent before replication of the actor finishes on the client, thus is doesn't know what to point to yet.
quick flint
that would be a pain in the ass
red sand
Can anyone please explain me how to assign team through Game Instance, and later spawn player based on that team after travelling to different map.
wide stream
Hi. I have a custom struct which contains a field of type UTexture2D (the texture is generated on the client) and I want to be able to call an RPC with that struct as an argument, so I need to serialize the struct. The problem is that I can't find a way to serialize UTexture2D . I tried to write a custom NetSerialize method for my struct, but the two approaches that I tried didn't work.
First I tried to just MyTexture->Serialize(Ar) (Ar is FArchive), but this spits out
Bad archive positions for bulkdata. StartPos=-1 EndPos=-1
Then I tried something like this
auto& textureBulkData = MyTexture->PlatformData->Mips[0].BulkData;
Ar.Serialize(textureBulkData.Lock(LOCK_READ_ONLY), textureBulkData.GetBulkDataSize());
textureBulkData.Unlock();
and got
LogNetPartialBunch: Error: Attempted to send bunch exceeding max allowed size. BunchSize=2097167, MaximumSize=65536
in return
What are my options? I would like to avoid using external services, like S3 or similar.
regal drift
guys how are you? fast question, then I test my multiplayer (in engine) server spawns my player character how can i disable that?
empty axle
@wide stream maybe you could take that bulk data (if I remember correctly this is actually an array of pixel rgba values) apply some compression algorithm and then try to send it?
wide stream
@empty axle That's the next thing I was going to try if I couldn't find help here. I might as well try it in the meantime
chrome bay
Break it into chunks instead
Compression is fine until you get a random texture that doesn't compress small enough
That's a lotta data to send either way. What size is the texture?
wide stream
512x512 RGBA, so it should be 512 * 512 * 4 = 1048576 so 1MB. Dunno why it says 2MB, as there is only one mip level.
Can you actually chunk data in NetSerialize?
I'll try to create an jpg from it or something and then send the data
dark edge
@wide stream off topic, but is UTexture2D pretty easy to work with in C++ and does it have helper functions like getting color at coordinate etc? I have a custom struct representing my game map as a 2d array of enums but if Texture2D already is doing the work...
Like would you use UTexture2D for a tile map?
wide stream
You can do this, but it doesn't have dedicated methods for accessing individual pixels. You'd have to get the raw data of one of the mip levels and work on this. To sum up - I'd stick with 2d array of enums in your case.
empty axle
@dark edge from my experience it is not so easy to work with them as wookie said
unkempt tiger
does it make sense using reliable RPCs to tell when a weapon starts and stops firing?
it should be just 2 reliable RPCs per mouse press - worst case scenario is the user firing single rounds constantly (so 2 RPCs per bullet)
dark edge
@unkempt tiger It depends. Many games use one per shot for low rate weapons and firing state for high rate ones
unkempt tiger
Yeah
What i'll do is for single firing mode, I'll use one RPC
and for auto and semi-auto, 2 RPCs, assuming players dont use them as single fire mode :)
meager spade
i fire a RPC for every bullet 😄
lost inlet
we do, but we also have a FirearmState variable, that does stuff like looping audio which is kinda needed for full auto
unkempt tiger
yeah
thats the kind of solution I was aiming for
only a 'start' reliable RPC, and a 'stop' reliable RPC
throughout which the weapon simulates bullets at the correct timings with proper sounds etc
lost inlet
think i would take a variable with an OnRep over that approach though
unkempt tiger
why's that?
unkempt tiger
hmmm
if we ignore the original intent of replicated properties etc
is there any technical advantage to using replicated properties?
wise depot
hey, so i'm looking at some voip stuff and in the mute/unmute functions there is a flag for "is system wide" or "global", does anybody know what this actually does?
quick flint
no the voip stuff
also uhm, does anyone know how long it takes for a replicated variable to replicate an integer?
wise depot
we've been using it for months and not seen any issues with it lagging servers
quick flint
i turned it on, and it just lags
clever plinth
Here's a quick question: How does team matchmaking work? With a friend/lobby system?
raw quarry
When I start my Linux server (UE 4.25) on Debian 10, I get these errors:
all of the stack trace is in UE source code, so I'm not sure what to do here
would really appreciate a point in the right direction
winged badger
i'd say second event call from your construction script in one of the actors calls a c++ function that dereferences a nullptr
which actor, it doesn't say
can you hook up a debugger to the server process @raw quarry ?
raw quarry
hmm @winged badger how would I hook a debugger up? This is running on a debian VM lol
winged badger
idk, i don't use linux
raw quarry
dont think there's a good way without installing the editor on the same VM right?
I can check the construction scripts, but the weird thing is that it works fine when I build it for windows
winged badger
it is a dedicated server build, yes?
raw quarry
yeah
winged badger
any of them have CallMathFunction call on Construction?
raw quarry
nope
actually the name execCallMathFunction kinda gives the sound of being the C++ backing behind some math blueprint node
winged badger
or that compact math node in BP?
raw quarry
compact math?
winged badger
i can't recall what its called
but lets you enter several inputs and a full math expression
i find it needs way to many parenthesis for my taste so i don't use it
raw quarry
hmm don't recall having any of those
winged badger
so ProcessUserConstructionScript
is where it enters your BP construction script
then it calls 2 events
then what seems to be a its member function
raw quarry
ah hmm I see
winged badger
how many different actor classes are involved?
raw quarry
I mean I guess it's not terrible, but probably somewhere around 30 at level launch
winged badger
and i am pretty sure it ends up calling a c++ BlueprintCallable function with a null target
in the end
where it crashes
raw quarry
this is definitely constructor, not beginplay right?
winged badger
you can, for those that use construction scrip log the object name
it never got to BeginPlay
raw quarry
I rarely actually do stuff in constructors hmm
at least other than init'ing variables
winged badger
with debugger attached it would be trivial to figure it out
hmmm
i do have an alternate idea
you do have the binaries + pdb of that server build, right?
if so you need to find the minidump file of that crash
and just open it with visual studio
raw quarry
err I mean for linux it's like .sym and .debug I think right?
I'm not very familiar with linux either
winged badger
add the folder where that .pdb is in symbol paths
you need the non executable of the 2 binary files
that would let you load the callstack in the debugger, and you can just read what actor it was from locals/autos
raw quarry
ah, next to the binaries there's a new file called 'core' which might be the linux analog to a minidump..
now need to figure out what to do with this file...
winged badger
no other build crashes?
windows dedi build should also go kaboom at the exact same point
raw quarry
windows works fine
ok I installed GDB on my Debian VM which is apparently for inspecting these core files
ahh looks like it's coming from my GameState class constructor
welp it's working now, thanks @winged badger
weird that it broke Debian but not Windows tho
solar halo
Anyone in here do anything with steam rich presence?
lost inlet
yeah
dull lance
if you have a very large struct set to Replicate but have a lot of members tagged as NotReplicated, do the NotReplicated properties create overhead when processing that variables' replication state?
winged badger
no
they are just ignored by NetSerialize
i mean they do, but its negligable
more properties to iterate over and inspect
dull lance
I did some testing and even though I only have around 8-9 properties replicating out of 25ish members, setting my struct to Replicate seems to really slow down clients
winged badger
slow down, how?
dull lance
fps is good. However, their movement doesn't quite update properly and rubber band a tad
rpcs pass through just fine though
They just feel really choppy
winged badger
what are you replicating?
dull lance
mostly data types, so bools, enumerators, and other structs; they themselves have most of their values as notreplicated too though
winged badger
i mean that it affects movement
because choppy might not be due to replication if you rolled out a manual system for it
dull lance
I did not
winged badger
especially if physics is involved
dull lance
I have a component that handles CMC but that's just about handling an internal touch on things (crouch/sprint/prone/jumping/vaulting/etc)
winged badger
did you replicate a scene component in order to replicate the struct?
dull lance
The component is uactorcomponent
winged badger
then unless struct has movement related replicated properties, movement shouldn't be affected
dull lance
I see. For now I'll just be stuck with an error I don't quite understand 😄
winged badger
replicating scene components on the character
sending too many reliable RPCs
or doing something manually and non-predicted with movement speed
or physiocs
are most common causes
dull lance
I'll check that out as well
winged badger
example: predicted movement (CMC)
dull lance
in the meantime, on my main class I still get this as soon as I go multiplayer
Assertion failed: ArrayNum < ShadowArrayNum || SharedParams.Cmds[CmdIndex + 1].Type == ERepLayoutCmdType::DynamicArray [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/RepLayout.cpp] [Line: 1187]
winged badger
and you set speed on server first
dull lance
and this is the callstack
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:455]
UE4Editor_Engine!CompareProperties_Array_r() [d:\build\++ue4\sync\engine\source\runtime\engine\private\replayout.cpp:1187]
UE4Editor_Engine!CompareProperties_r() [d:\build\++ue4\sync\engine\source\runtime\engine\private\replayout.cpp:1124]
UE4Editor_Engine!CompareParentProperties() [d:\build\++ue4\sync\engine\source\runtime\engine\private\replayout.cpp:1063]
UE4Editor_Engine!FRepLayout::CompareProperties() [d:\build\++ue4\sync\engine\source\runtime\engine\private\replayout.cpp:1238]
UE4Editor_Engine!FRepLayout::UpdateChangelistMgr() [d:\build\++ue4\sync\engine\source\runtime\engine\private\replayout.cpp:977]
UE4Editor_Engine!FObjectReplicator::ReplicateProperties() [d:\build\++ue4\sync\engine\source\runtime\engine\private\datareplication.cpp:1530]
UE4Editor_Engine!UActorChannel::ReplicateSubobject() [d:\build\++ue4\sync\engine\source\runtime\engine\private\datachannel.cpp:3931]
UE4Editor_Engine!AActor::ReplicateSubobjects() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actorreplication.cpp:459]```some support forums said it could be a property in a struct that was not tagged uproperty, checked but it isn't
will try that
winged badger
good news is the fact i don't remember neams it was an easy fix
dull lance
For Debugging with rider, I just have to run it as Debug or do I have to build the target for DebugGame?
winged badger
debug = packaged
dull lance
so I'm getting a nullptr on this. that seems gone for now
@winged badger that's the data I got, which is pretty much as helpful as the crash callstack?
Unless I'm missing smth
and the only thing I get for that function on google is this
https://forums.unrealengine.com/development-discussion/c-gameplay-programming/36815-problem-with-replicated-array-of-custom-struct
which I already check the struct; all parameters are uproperties
could it be because I have several empty ustructs? (I'm not replicating them nor are they part of the system, but... could it?)
dull lance
and ... it wasn't either the struct parameters nor ustructs with no parameters
gleaming niche
well it has to do with something you are replicating subobjects for, right?
can't you walk back in the callstack
and see what actor it is? 🙂
dull lance
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaghhhhhhhhhhhhhhhhasdfasdfkjh
it was the fucking blueprint
recreated the class
error is gone
epic why
chrome bay
Doesn't seem to work if you ask me, everything is in different positions
gleaming niche
at first i thought he was asking for help making the plugin work, but then i realized it's a demo.
kindred widget
The ball spin bugged me. Looks derpy on the other client.
winged badger
only thing that seems to work there is objects that haven't moved at all seem to still be in correct position
waxen socket
If it's one of those "the match is over here's all the info you need" kind of structs, then yeah RPC makes sense
@chrome bay
For information this important, it seems to me that a multicast might not be reliable though, no? I wouldn't be able to count on it coming through every time.
chrome bay
It really depends what it's for
At the end of the match in HLL we send out some reliable RPC's to tell players to progress through the UI, show scoreboard, show XP progress etc.
All of that info has to reach them before they can show the relevant UI pages
waxen socket
I need to display the final score, gold earned, objectives hit, etc.
chrome bay
Yeah, so that sounds like a use case for reliable RPC to me
"Game is over, show the finale screen" etc.
waxen socket
Okay, I think I'm on the right track then. I was going to have a timer in the game over screen widget checking bFilledOut before I display it.
chrome bay
That all goes via the player controller FYI in our case
waxen socket
I thought you once told me something like, "I've never found a use for Reliable."
chrome bay
Not at all, reliable we use all the time
waxen socket
Oh...
chrome bay
The end-of-match flow is pretty rigid, so our game mode manages a sequence of states and updates the controllers with the relevant info at each phase
E.g "show scoreboard", then 30-seconds later, "show XP progression" etc.
But it would make no sense to use replicated properties for handling that
winged badger
i just reliable Client RPC every controller for our equivalent of that
waxen socket
Because the overhead of checking replicated properties all match is undesirable. I understand.
chrome bay
Well that and it's also just easier to send an RPC
waxen socket
Why not a multicast, Zlo?
winged badger
you could spawn AMatchSummaryActor at the end of it
chrome bay
Multicast makes no sense for player controllers
winged badger
toss data into it
and let it replicate, Initial_Only
but its just simpler to iterate over all controllers and Client RPC each
chrome bay
defo
waxen socket
I see. Thanks for that tip.
And if a spectator joins during the game over screen I could... RPC them the data on PostLogin maybe?
winged badger
in BP, you can just GetGameMode->GetNumPlayers-> for (0 to NumPlayers - 1)->GetPlayerController[Index]->CastToYourController->ClientRPC
one of rare uses GetPlayerController[index] that i approve of 😄
chrome bay
haha
for (FConstPlayerControllerIterator Iterator = GetWorld()->GetPlayerControllerIterator(); Iterator; ++Iterator)
Joys of CPP...
winged badger
and the algorithm to match a controller to its index is just... ouch
then its incrementing the Index variable inside that loop until the controllers match
fleet raven
you could replace that with for (auto* Player : TActorRange<APlayerController>{ World }) ...
chrome bay
Doesn't that require going over all actors in the level though? IIRC the controller iterator is a separate list
winged badger
yeah, this is not TActorIterator you replaced in that example
chrome bay
Yeah TActorRange is way nicer than TActorIterator just for syntax alone..
UWorld has PlayerControllerList and ControllerList though which are nice for convenience
They used to have a pawn one but i think it's gone now..
kindred widget
@chrome bay Heyo. You told me something quite a while ago about Arrays and replication. I can't remember exactly what it was called but it was a replication way to replicate arrays by index only, but out of order?
chrome bay
Yeah, look at FFastArraySerializer
All the relevant info is in NetSerialization.h
Essentially the data type should inherit FFastArraySerializerItem, then you create a wrapper struct for the array that inherits FFastArraySerializer
And implement the requires gubbins
kindred widget
Ah. Thank you! I'll look into that. Been learning C++ a lot lately, so I might actually understand half of it now.
waxen socket
@chrome bay, in relation to the endgame summary setup we were discussing, how do you handle different game over screens needing different information? Is there a way I could pass a different struct of information back through the RPC depending on the widget I need to show?
waxen socket
Certainly I wouldn't keep it all in one struct regardless of the needs of the widget in question, eh?
rich ridge
@waxen socket if you are sending struct in RPC then your RPC logic is not generic.
in this case you will end up having the exact number of RPC functions as that of number of different UMG
waxen socket
Yeah, that's what I'm afraid of.
rich ridge
so this is my generic implementation.
void ClientToServerRPCInternal(const ENotifyRPCType NotifyRPCType, const TArray<uint8>& AdditionalData);
based on enum type, I convert AdditionalData to my UObject
void ServerToClientRPCInternal(const ENotifyRPCType NotifyRPCType, const TArray<uint8>& AdditionalData);```But you're only sending over ints?
rich ridge
yes, so I convert TArray<uint8> into FString and then parse it to respective class.
{
if (GetLocalRole() == ROLE_Authority)
{
if (NotifyRPCType == EnumType::ShowScore)
{
const UScoreModel* ScoreModel= UScoreModel::Get(AdditionalData);
//Additional Logic
}
else if (NotifyRPCType == EnumType::ShowScoreType2)
{
const UScoreModelType2* ScoreModelType2= UScoreModelType2::Get(AdditionalData);
//Additional Logic.
}
}
}```I see. Thanks for sharing that.
zenith wyvern
any chance anyone can point me towards a good resource for making top down template work in multiplayer? ive seen a few options. i guess AI character?
rich ridge
launcher has an example of top-down sample
zenith wyvern
doesnt work in multiplayer, navmap of right click movement doesnt replicate
I saw a solution using a server side and client side controller for each player
rich ridge
just combine this with Shooter Game, and you have working Game with Top-Down and multiplayer.
kindred widget
@zenith wyvern But there's already a server side and client side controller for each player?
past bear
so.. an array inside a struct - if I have an array of those structs, is it expected that this array property won't replicate?
zenith wyvern
i guess the server side controller is supposed to be AI, and can do simple move to location via navmesh
and the client side controller sends inputs to server side, since it cant call simplemove itself
wind garden
any chance anyone can point me towards a good resource for making top down template work in multiplayer? ive seen a few options. i guess AI character?
@zenith wyvern It's not trivial. You can tell the server where you want to go and let it move your character, but that's a very bad solution especially in high latency situations.
So what you want to do is implement a path traversing function on the client. Activate client nav data in the project settings. Then you can use the nav system to generate a path. You need to walk this path by code using input commands.
zenith wyvern
yeah ive seen complaints about a few solutions. so allow client side nav is a definite?
wind garden
yes, thats how we do it
zenith wyvern
are there any good writeups? the custom pathing functions?
wind garden
or let's say did, we switched to WASD later on but the click to move functinality is still in the game
there was one write up about it
can't find it anymore
maybe it was on the old wiki
void ALlGamePlayerController::MoveToClickedPoint()
{
ALlPlayerCharacter* Char = (ALlPlayerCharacter*)GetCharacter();
if (Char) {
FHitResult Hit;
GetHitResultUnderCursor(ECC_WorldStatic, false, Hit);
UNavigationPath* NavPath = UNavigationSystemV1::FindPathToLocationSynchronously(GetWorld(), Char->GetActorLocation(), Hit.Location);
SetPath(NavPath);
}
}
// Move to next point on client side path.
void ALlGamePlayerController::MoveToNextPathPoint()
{
if (CancelPathFinding == true) {
NavigationPath = nullptr;
CancelPathFinding = false;
return;
}
ALlPlayerCharacter* Char = (ALlPlayerCharacter*)GetCharacter();
if (Char) {
TArray<FVector> PathPoints = NavigationPath->PathPoints;
// End of path
if (PathPoints.Num() <= TargetPointIndex) {
NavigationPath = nullptr;
return;
}
FVector Dist = PathPoints[TargetPointIndex] - Char->GetActorLocation();
Dist.Z = 0.f;
FVector TargetDirection = Dist.GetSafeNormal(MoveTolerance);
if (TargetDirection.IsNearlyZero()) {
++TargetPointIndex;
// Recall itself to next step
MoveToNextPathPoint();
}
else {
Char->AddMovementInput(TargetDirection);
}
}
}
this two functions could help you
zenith wyvern
thanks!!
winged badger
@wind garden @zenith wyvern predicted movement via CMC is possible, but requires an extensive override of the CMC
since its hardcoded to work with Character, PlayerController, and AutonomousProxy role
so basically you have to override every function in CMC + APlayerController::PlayerTick that have that coupling, if you wanted to use an AIController instead of PC for your player
rich ridge
@wind garden @zenith wyvern I think customizing CMC will be waste effort. You can expect NetworkPrediction soon.
winged badger
soon = 6-9 months 😛
rich ridge
I think there is significant progress in dev-networking branch
winged badger
expect it not to be usable in production code in its first, and possibly second version as well
few things are
rich ridge
I think its planned for mega Unreal Engine 5 release.
and if that is true, then Fortnite will battle test NetworkPrediction in UE5
winged badger
it still won't work proper until they fix all the ways unreal devs manage to break it
rich ridge
true
wind garden
well the two functions i posted take care of it
it's predicted as is uses movement inputs
winged badger
it is
rich ridge
@wind garden Isn't thorium a radioactive element??
winged badger
we rewrote our CMC to have its full functionality
instead of manually calculating inputs along the path
winged badger
wasn't that bad
it was mostly a c/p of CMC function, do a couple of tweaks to strip hard dependencies
and don't call super
not having roles right has additional sideeffects
you won't spot them if you're using a dedicated server, but on listen...
when CMC ticks the client player skeletons twice
ouch
wind garden
yeah, i also need to set roles and ownerships correctly, i neglected that most the time
for example currently you could steal another players item as the ownership isnt set to the player
minor exploits 😄
winged badger
eventually you'll probably even want your instigators all connected properly
i don't think we even use a SpawnActor function if its not wrapped anywhere nowdays
wind garden
yeah, makes sense
I do set the instigator for projectiles and such. For actors that actually come from other actors. But it's not set for character spawns and such.
zealous saffron
is there anyone to send an unreliable RPC at a consistent rate outside of tick? I have it working inside tick but I'm wondering if there's a cleaner way to do it.
this works
winged badger
you can run it on a timer if TIck is too much
you'll need to cache the WorldTimeSeconds as you send it, so you can provide DeltaTime on the next one
unkempt tiger
so general player inputs: you know walking, moving, aiming the mouse - should these be reliable RPCs?
Only sent when they change?
kindred widget
Most times I think that kind of stuff is handled via unreliable. Reliable is usually saved for more state change things. Telling a weapon actor that it's trigger is pressed for example. Movement usually just gets continually RPCed unreliably because it won't matter so much if a few miss with the way the movement component is set up.
unkempt tiger
what about single presses?
jumps for instance?
or tapping R to reload? or grenading?
kindred widget
Possibly reliable. Much like the trigger press, they're necessary actions that are required to happen. Movement input is handled by telling the server often enough what direction to move and it just keeps moving that way until it stops receiving a long enough vector for a long enough duration and slows down to a stop.
Are you using Characters?
unkempt tiger
Nope, I'm using my own class derived from pawn
kindred widget
I'd probably consider looking at how the character class's movement component works. That many reliable RPCs are likely to cause you problems if you put it on an axis input.
unkempt tiger
Oh yeah
I don't have continuous axis inputs though
It's just a binary 'moving forward' or not
I have a fairly big struct
With booleans 'is forward pressed, is backwards pressed, is primary fire pressed' etc
each serialized as a single bit
kindred widget
Hmm. If it's a simple one time act every so often, maybe? I don't see why that would hurt if it's just an input action and not an Axis.
unkempt tiger
Yeah true... hmm I DO have a rotation in there, so maybe if I carry over the rotation to an unreliable protocol and use the actual presses reliably
Hey @kindred widget , thanks for your input 
kindred widget
🎮
urban cloud
Hi, i need help.
multi-user editing server loads RAM. In the task manager, you can see that the server running on the command line is loading the RAM. used with a colleague VPN for direct communication Hamachi. For a month we figured out how to set up joint development of a project, but the hard load on RAM, up to a blue screen or the departure of the project itself, interferes. Help me please!
rotund sapphire
Add more RAM to server! Also try change scalability settings (eg low view distance and low texture). set texture pooling size small.
Use level streaming, and load only what you are actually working on.
urban cloud
it is not the project simulation itself or the project itself that loads, but the window in the command line when the server starts. loads all 16 GB
rotund sapphire
16gb is not enough for desktop use, let alone small for a server. Go for 64gb ram by default. Or more if possible.
urban cloud
server for team development of a project of 2 people on 64 GB?
rotund sapphire
unreal use lots of meta data, needs lots of ram to store it somewhere
urban cloud
Why then did unreal not indicate in any documentation that this plugin requires 64 GB of RAM? Surely there is a catch in something that I did not take into account or that I forgot to indicate
rotund sapphire
Maybe there is a setting to reduce ram use, i'm not familiar with this solution.
urban cloud
It's horrible. 64 GB RAM is worth space money in my region
rotund sapphire
How much ram it uses with an empty project?
urban cloud
1 gb without "multi-user editing" plugin included
rotund sapphire
I ask, how much ram server will use with empty project when you enable Multi editing?
urban cloud
The project is almost empty.
I created locations in the world composition, but my colleague and I are working on only 1 location, which practically does not strain the PC. there are practically no objects at this location.
bitter oriole
Well, it's weird that an empty project would use as much memory.
urban cloud
Initially, the server turns on, the command line opens, my colleague connects and for 2 minutes we can see each other. But as soon as we start doing something, a colleague, for example, imports 3D objects, I work on splines at the location, the load of RAM is increasing in the open command line, which opens when the multi-user editing server starts. then the computer is kept under such load for a couple of minutes and either a blue screen appears or the project crashes
rotund sapphire
i have estimated 64gb for 2x 32gb for two people but it's not too much anyways. 16gb however is not enough for many tasks in unreal.
import tasks for example use many ram
urban cloud
Exactly. can import not through multi-user editin, but through version control system? maybe this is the problem?
rotund sapphire
Yes this could reduce the ram use. But some work will always increase memory use, and eventually run out of ram anyways.
urban cloud
More precisely, not a problem, but a solution to the problem!
rotund sapphire
Try to setup alert tasks, and restart server when too much ram use. Maybe it avoid sytem crash.
urban cloud
could you tell me about alert tasks. Where are these settings?
rotund sapphire
Some alert in windows.
plucky crow
Can you delete widgets from all players at once?
Is there a way for a player (the host) to force everyone from the lobby to remove the widget (a menu from where players chose their team)? I tried making it so if the player with server authority presses a button it gets all widgets of that class and removes them from parent but it doesn't work.
fleet raven
well obviously it doesn't work
widgets are local
you need to communicate to other players that you want them to remove the widget
winged badger
if that is part of the seamless travel to new level
can just override PreClientTravel in PC and do cleanup there
wide stream
Hi. Yesterday I was asking how to serialize a texture to a FArchive. If someone is interested, then here is the code
https://answers.unrealengine.com/questions/981259/farchiveing-a-utexture2d.html?childToView=981633#answer-981633
plucky crow
thanks
tried to make a replicated variable change it
but it only works if i use a manual coundown
dim geode
does anyone have idea about.. webbrowser, in multiplayer?
i want to change everyone's screen, when a player types new url or clicks on screen
ive tried with replication and multicast , first time trying this and it didnt workj
plush mist
Guys, I'm trying to move object on client by navmesh. But nav mesh seems to be available on server-side only. Is it possible to make FindPath() work on client as well?
@wary wyvern Project Settings -> Allow Client Side Navigation
fossil zinc
Hey everyone. We're new in networking and are doing an online prototype. Now we successfully replicated some gameplay in the same machine but we want to do a test for online multiplayer. However we couldn't find much information about this.
Anyone knows which would be the procedure? We launched the server I. Listen mode and come Ted from other pc using the open Up:7777. We also tried emulating a local network using Zero Tier and nothing. Any ideas or resources to follow?
plucky crow
@fossil zinc
thats the only good source for stuff like that, for other you will need experienced people
fossil zinc
Thanks a lot!
fossil zinc
Do you guys know if networking between the internet requires to have the unreal engine source code? or you can use the engine downloaded from epic's launcher
winged badger
it doesn't for listen servers
it will require host to forward its ports, in its most basic form
open ip:port
fossil zinc
SO basically if I'm running as the server will need to have the source code, right?
winged badger
no
if you're running listen server, and you're not on the same subnet
only hurdle to connecting is your router is not expecting a package from the clients IP address
so it will choose to just discard it
thats where port forwarding comes in
fossil zinc
Ok, got it. So the clients don't need the source code if we're not in a subnet?
winged badger
if you package a game and distribute it that way
they only need .dlls
erm... binaries
doesn't matter if its same subnet or not
none of you require engine source
unless you're using dedicated servers
because those can't be packaged on vanilla engine
fossil zinc
Ok. Another question, how do games usually handle the port forwarding? Do all games that work this way need to open router ports manually to work?
Or the only way to bypass that is using dedicated servers?
winged badger
no decent game these days requires port forwarding
usually using a service that does NAT punchthrough for them, or using a public matchmaking server that implements it by hand
fossil zinc
Like Steam?
fossil zinc
So, technically. If it works LAN will probably work on steam?
fossil zinc
The thing is that we're a remote team, trying to find a way to play test multiplayer. Would the only way to do that be port forwarding?
wise depot
des anybody know how I can change hte voip volume? i've tried setting a sound class but if i change the volume property of that at runtime it doesn't affect it
winged badger
if you don't have a steam ID
and are looking for fast solution
then port forwarding with open ip:port is the simplest one
as in, you can literally implement it in 10 minutes
fossil zinc
I understand, if it works that way you thing will be easy to migrate to Steam once we have the ID? One of us is working on it, but we wan't to progress while he's at it.
then port forwarding with open ip:port is the simplest one
@winged badger
winged badger
you just replace the temporary hack with somewhat more complex steam APi calls, and yes
gleaming niche
isn't it possible to test with the spacewar id? I've never actually used the spacewar Id because i've always had app ids lol
gleaming niche
i mean i'm sure with spacewar, you can test multiplayer, since it would be a shitty example if you cannot connect to anyone.
analog rover
Does anyone know how to simulate lag in editor? Seems like the old commands don't work
winged badger
the autocomplete doesn't work
the commands do
net pktlag=300
no spaces around =
winged badger
thats the default one, yes
you also need to CreateSession, and OpenLevel with ?listen parameter on host
then others do open ip:port
and they hop in
fossil spoke
@analog rover Ive noticed they are now moved to the Advanced Multiplayer section
You now have to enable a checkbox called EnableNetworkSimulation or something
Then you get access to change lag and packet loss etc
fossil zinc
@winged badger Thanks a lot man, you're a life saver.
analog rover
@fossil spoke it seems like the net pktlag=300 command is working, and there's a big ol' section in the Editor Preferences with all of the options you mentioned
fossil spoke
Thats what i was talking about
analog rover
Yup! Just in case anyone is being stupid like me and can't find it, that's where it is 😅
wise depot
well it looks like the voip sound class setting in the project settings just doesn't work
red sand
Error MSB4057 : The target "Games\LMSServer" does not exist in the project.
How can I fix this error
raw quarry
Why doesn't switching to a server configuration in Visual Studio turn on the UE_SERVER macro so I can actually use intellisense on my code inside the macro if statement?
any ideas how I can make it do that?
gleaming niche
it's set at compile time, not in the project afaik
like from ubt
so you'd either have to comment it out, or just stick #define UE_SERVER 1 temporarily (and don't forget to remove it!)
raw quarry
hmm there's gotta be a way to define a macro for specific configurations though somehow right?
gleaming niche
well, you could modify the project in visual studio
since the project isn't used for compiling anyway
so it would stay there until it's regenerated.
raw quarry
yeah good point
gleaming niche
oh maybe not. it has no actual rules
ahh
let me try something.
oh wait, i use VAX so i don't havet his problem.
gleaming niche
there is an intellisense setting under the NMake property, which you may be able to throw UE_SERVER in there for t he serve config
random nymph
What needs to be done to be able to join a game with incompatible_unique_net_id?
Problem is that the dedicated server doesn't necessarily need to use steam OSS, but our client does. And if the server doesn't have steam OSS enabled it won't allow clients to join
And the reason I don't want steam OSS on dedicated server is because it cannot be initialized on more than 1 instance per server
vagrant grail
I'm following Virtus Tutorial on How to do Steam Multiplayer game, but I get an error when I try to test the network part using 2 players, any help please ?
random nymph
If that blueprint runnin on the server? There might be no player controllers on the server if there is no players
vagrant grail
The thing is the play menu to test your game isn't the same for the network part as the video
I have this
and he has this
he doesn't have the net mode thing
random nymph
Yeah currently trying that 😄
lost inlet
const bool bUniqueIdCheckOk = (!UniqueId.IsValid() || (UniqueId.GetType() == UOnlineEngineInterface::Get()->GetDefaultOnlineSubsystemName()));
this line does it
and you can safely not do the second check
random nymph
One thing I don't understand in that check is why there is ! before the UniqueId.IsValid()
If we want the bUniqueIdCheckOk to be true wouldn't we then want the UniqueId to be valid and not valid?
vagrant grail
any help plz ?.
random nymph
Try to play as offline or as listen server. Play as client is the same as "run dedicated server" checked on on the old version
gleaming niche
uhh since when. I just loaded two dedicated servers from the same folder that is updated with steamcmd. the second one just changed the port with -port on the command line, they both connect to steam.
you just have to use different ports
ie: default is -port=7777 -queryport=27015
so second server is -port=7778 -queryport=27016
it's actually the same as like.. any game that i've ever ran dedicated servers for. you have to use different ports.
shy apex
on the topic of ports, does anyone know how to pass those port parameters on a linux build with like c# or something?
would be cool if you could set those ports at runtime and not as launch args
vagrant grail
@random nymph same problem
robust snow
I have a question that I can't figure how to ask on Google. Assuming you're on a server, and you received a item from other player.
= How does that "item" object get transferred between players?
= Is there a standard way of defining an "item" per se such like 'food', 'armor', 'shoes', 'hat' etc ?
shy apex
you gotta make a system for that
maybe an enum that defines an item type
and and "item" is a struct that has basic info
you could have an item base class and all other items could be child classes
so every item can be very different but still be stored as 1 array in an "inventory" variable
robust snow
in a case the player received items from quests they completed. The items are supposed to be stored in a Database.
How does the data transfer? in term of data (enum like you say) or file transfer (.json, .xaml etc)
shy apex
you could create a data table of items and the row name as the id (0-999) and when you get an item you just get the id
robust snow
then tell the client to instantiate the item with the corresponding ID?
shy apex
you dont really need file transfer, if both the client and server share the data you can just communicate items with their id's
ehh
idk what kind of system you wanna make
if you want to have like pickups then spawn the item actor on the server
robust snow
thank you for responding, i'm just thinking of a standard/generic way
shy apex
in my br game i have a pickup class that just shows a static mesh as a preview and a name
robust snow
before i get into modify them
shy apex
it contains an item variable that is set on the player when they pickup the item
PM me if u want, i can show my system
random nymph
i'm trying to use OSS Null on dedicated server and OSS steam on client. When client connects to dedicated server the server crashes
thin stratus
You can't, at least not by default
random nymph
thin stratus
I know there is more to it, but at the bottom there is a check on Login that checks if the UniqueNetId is the same class or format or so, and if that mismatches it will disconnect your client.
Your Server crashing is however something else.
Assertion failed: GetType() == FName(L"NULL")
random nymph
I already overwrote the prelogin function to allow the login with incompatible net id
thin stratus
Yeah that looks like it's failing that sort of check
Well, the check is there for a reason, right :D
random nymph
So what is the next place to overwrite 😄
It's pretty dumb that only one game instance can be running on one server instance if steam is used
thin stratus
Why do you even want to mix Subsystems?
random nymph
Because if the server uses steam oss there can be only one server instance running on one server hardware
thin stratus
That's wrong
random nymph
🤔
thin stratus
You can lunch as many as you have resources for
(and ports for what it matters)
Server only needs the SteamDLLs
Not an account
random nymph
I'm using gamelift and trying to get running multiple simultaneous processes working, haven't yet succeeded if steam oss is used but it works without steam oss
thin stratus
Well, let's put it like this:
UE4 + Steam + GameLift should work just fine. I set that up in the past, as well as for PlayFab.
You do need some extra code to go from IP+Port to the SteamID of the Server, but that's about it.
GameLift maybe offers enough tools to have the Server pass over the SteamID directly, sadly PlayFab didn't allow any extra data despite the IP+Port.
random nymph
game joining is working currently through ipnetdriver and steamnetworking is disabled
gleaming niche
I'm using gamelift and trying to get running multiple simultaneous processes working, haven't yet succeeded if steam oss is used but it works without steam oss
@random nymph i already showed you how to do multiple intances on one server.
scroll up, since I didn't tag you.
since your whole reason for trying to hack this is "[1:27 PM] Piilorasva: And the reason I don't want steam OSS on dedicated server is because it cannot be initialized on more than 1 instance per server"
when it absolutely totally can
and it's crazy to believe that it can't
how else would hosting companies be able to provide tons of servers
random nymph
Ah sorry I missed that
gleaming niche
never used gamelift, but surely you can pass launch options. so you just spawn a bunch of servers with incremental ports.
both the game port, and the query port.
random nymph
Yeah I can pass launch parameters, but there is only one one place to pass them as I know and those parameters are passed for all of the concurrent processes 🤔
gleaming niche
either way, there must be a way to control the launch process, and it should be scriptable
random nymph
Or the port is assigned automatically for each game session instance, but I don't know how to supply different queryport
gleaming niche
eg, 8 years ago, i would have a script that could update and restart DS's on multiple bare metal machines. it would start at base port, and each machine would fork and increment the ports
random nymph
Yeah. I'll try messing up with the gamelift server start process. Thanks 🙂
vivid prawn
Hi folks, I have a question. How does GameMode detect if a player died in the game? currently I'm checking each character health under Tick event to detect which one is dead and somehow I feel there should be a better way.
rich ridge
@vivid prawn why are you ticking every frame, it will eat up your performance.
It's the character who should broadcast to GameMode or whatever that he died.
vivid prawn
but i thought client shouldn't/can't access to GameMode right
rich ridge
Inside your character class do this if(GetLocalRole() == ROLE_Authority){
GetyourGameMode
}
Sever also have a copy of your character class and it will have GameMode instance
No need to do RPC
gleaming niche
it knows it's dead, when the pawn is detached from controller.
when controller has no more pawn.
by default.
though "dead" is not precise, in that instance
and the server can access gamemode, so the server can clearly tell the gamemode when the player has died, since the server is what should be dealing with takedamage and health.
vivid prawn
@gleaming niche you mean I should Unpossess the controller from character? and what event does it trigger in the GameMode?
vivid prawn
I'm doing it in BP 🙂
gleaming niche
Well the process is when player dies, to tear off, and then remove from controller pending destroy
I dunno what those are in BP though
I use a delegate to notify gamemode of death, which then also broadcasts death notice to everyone else, and handles anything special
woeful ferry
Hi,
I can't see my CPP classes in my content browser. The project compiles and I have view options set to "View C++ classes". Are there any other issues that might cause this?
rich ridge
@woeful ferry is your class BlueprintType
woeful ferry
@rich ridge It's just an empty c++ class, to push folders to SC.
rich ridge
UCLASS(BlueprintType)
class UMySimoleClass : public UObject ....
rich ridge
Cool
vivid prawn
@gleaming niche I see... I think I got what you mean, basically once the character is dead (health == 0), I got to unpossess the controller and destroy the character, then in a custome event (replicate to the server) and tell the server "this character is dead".
gleaming niche
You dont replicate to the servee
The server is who controls the state
All damage should be handled on server only.
vivid prawn
Yeah, I have to rethink my current structure, thanks for the help 🙏
random nymph
Looks like I finally got multiple concurrent instances running on the gamelift. There was still initialization errors if I tried to start multiple processes by default, but by starting the other processes after the main server is spun up seems to work
gleaming niche
congrats
random nymph
Thanks for the help 👍
analog rover
Has anyone had experience with programming "combos" in a multiplayer game?
Basically, if the player tries to attack again during a certain window of the attack animation they should play the next animation in the chain, but I'm not sure how to synchronize it, since the animation windows might not line up due to desync in locally applied hit slowdown effects, or just a bad connection
My current approach is to let a client request any move, and just have the server validate that it is somewhat reasonable, within a rough amount of time after the last animation started or ended
(For additional context, this is intended to be used in a co-op game with ~4 players max, so I'm not as worried about cheating as in a competitive game)
wet tangle
The multiplayer works perfectly fine in PIE but when i package the game the find sessions node always returns nothing. Does anyone know why?
Node setup and Engine.ini file for steam subsystem, the online and steam subsystems plugins are all turned on
shy apex
make sure steam is running
you should be able to shift+tab and get the menu
if you cant, make sure there is an steam_appid.txt file next to the executable that contains the appid which in your case is 480
wet tangle
the steam overlay pops up when i run it
also i forgot to mention that im running 2 instances on 1 pc (the error that pops up isn't about the same machine issue but 0 sessions found)
gleaming niche
You cant do two instances on one machine
Only one of them will actually authenticate with steam.
You cant do server and client on one machine either. You can do multiple servers, but not multiole clients.
If you want to test a listen server, you need two machines and 2 steam accounts.
rich ridge
@analog rover I think you should use GAS. GAS will eliminate the extra work of validating moves with server.
analog rover
@rich ridge this is with GAS already 😅
rich ridge
@analog rover so even I have a combo with GAS, the way I implemented is
- Have one input press task.
- Have one Timertask
So whenever input is pressed and my ability is active and the timer task has not expired play montage.
Or whatever custom logic you have
And when the ability ends , end those tasks
And please don't override InputPressed function as it only runs at client side.
meager spade
analog rover
I was hoping for general multiplayer advice not specific to GAS, but I am already using the #gameplay-ability-system channel for specific stuff
Though I think my issue is not replicating the tags across the server and relying too much on local prediction
hollow bane
If you want to test a listen server, you need two machines and 2 steam accounts.
@gleaming niche That's good to know in advance, just about to test on steam - if you don't have 2 pcs, is it possible for a friend to test? Would I need to set up friend lists in order for this to work? Many thanks in advance.
gleaming niche
Either add them to your steamworks, or just give them a key so they own it.
Its easier to just push a build
Tbh
And of course you can do debug if youre not sure, rather than shipping.
hollow bane
Its easier to just push a build
@gleaming niche Okay, thanks for your help. That sounds like a reasonable workflow.
gleaming niche
One of these days i should publish my scripts/tools.
I jave a whole setup where i can build multiple configurations from one folder, where it replaces .ini and target contents, so i can just push a button and it goes straight to steam lol
Well, non beta branch needs to be manyally activated. But thats not an issue
Build ds, and client. Push all.
hollow bane
I jave a whole setup where i can build multiple configurations from one folder, where it replaces .ini and target contents, so i can just push a button and it goes straight to steam lol
@gleaming niche Awesome. I'm a total newbie to MP in Unreal, so baby steps right now. Just want to get a framework up so I can test basic movement, health, ammo, damage and have a simple create, find and join session working.
hollow bane
And of course you can do debug if youre not sure, rather than shipping.
@gleaming niche Out of interest, do you know if I can use a mac as a 2nd machine (as a client)? I have a mac and a pc, but not 2 pcs.
hollow bane
Compatible.
@gleaming niche Thanks again, much appreciated. Have a great weekend.
viral phoenix
i need some help, im making the game where one player will have control over the world (enemies, traps etc) so i wanna give them a separate player controller because i think thats the way to go about it but im not sure how to assign player controllers to specific players
dim geode
is multiplayer session and dedicated server completely different concept, or.. what are they?
rich hare
@viral phoenix first off, use "start players as spectators" in your gamemode. There are two ways you can then go about this
A. have the server always be the controlling player and clients are subordinate
B. change who is the controlling player when the match starts or at random
the picture above represents the first method using "onpostlogin" in gamemode
this is method B (sorry for the spaghetti i had to whip this up quick)
viral phoenix
oh, thank you :)
rich hare
you might want to get the random integer immediately after get all actors of class since ive had instances where pulling from the same random int node will re-seed it
viral phoenix
im using top one, since i want the server (host) to always be the one with most control
plucky crow
@rich hare is there a way to use all of the player controllers to check if they have a widget on and then delete it?
like a loop?
rich hare
widgets (in the context for hud usage) is only stored on clients.
the best recommendation i can give is to have an event that executes only on client. call it using for each loop on all the actors and have each one get their controller. from there you have access to widgets in the viewport. this can be done by storing the widget as an object variable in the controller blueprint or using a more inefficient "get all widgets of class"
the way you do client actions is dependent on how you handle widgets in the first place
plucky crow
well i have a team select widget and i want the host to press launch after teams are balanced but if i use the has authority it only deletes on his screen
the team select widget (for now) "spawns" after you close another widget (as this problem is shared in 2 places)
empty reef
anyone got any recommendations for a simple team system?
plucky crow
yeah, use tags
then when you fire a gun through a raycast you can check the tag i guess
empty reef
tags?
plucky crow
it shouldnt be hard to make, i have one already but i have problems with the team select
or this
empty reef
thanks
carmine citrus
I'm a new user of Unreal, and trying to figure out how to spawn an network player to a player start pawn. My question is: How do I get all the PlayerStarts, and the players too?
zenith wyvern
can get all the player starts with get all actors of class, players youll want to store as they connect
carmine citrus
@zenith wyvern I have no idea how to get all the actors or players in c++. Is there a method I can use? i.e? GetAllPawns<PlayerState>()
meager spade
GameState->PlayerArray
dont store the players yourself
PlayerArray contains ALL playerstates in the game.
to get PlayerStarts, use for (APlayerStart* PlayerStart : TActorRange<APlayerStart>(GetWorld()))
carmine citrus
ahh, thanks @meager spade
icy nacelle
Can anyone recommend a tutorial series (free or paid) for someone who's very experienced in blueprint but hasn't touched multiplayer to learn it?
icy nacelle
I'm aware and have read the compendium, but I really learn from creating/watching examples of work - that's why I'm asking for tutorial series 🙂
charred condor
Hey guys I have been working on a local retro multiplayer game but now with COVID I have been finding it hard to actually figure out how to test
Online pretty hard, Parsec, does not see controllers, and same with remote play on steam
Has anybody else had this issue with remote play or parsec with your unreal project? Both of these systems seem to work fine except when you using my UE4 project
At this point I am willing to someone to fix this problem, but don't know if looking for talent section has something so specific to what looks like a bug fix
celest zodiac
I have multiplayer setup, and I like to send private message when click to another player, so how I can get player name or playerstate when click event?
plucky crow
I'm aware and have read the compendium, but I really learn from creating/watching examples of work - that's why I'm asking for tutorial series 🙂
@icy nacelle oi
i might have one
its C++ but not multiplayer
I MEAN ITS MULTIPLAYER, but only C++ and no blueprints
icy nacelle
For this project I'm just looking at BP, thanks though 😄
vagrant grail
I'm following Virtus Tutorial on How to do Steam Multiplayer game, but I get an error when I try to test the network part using 2 players, any help please ?
The thing is the play menu to test your game isn't the same for the network part as the video
I have this
and he has this
vagrant grail
vagrant grail
well it's the same thing as the one in the normal menu
so wich one is the equivalent of "dedicated server" ?
I have these errors when I try to host a server with 2 clients
gleaming niche
play as client
is the equivelent of the DS check box
the 4.25 way screws up a bunch of things. I had to modify the engine and put some 8 year old code back in, so I could continue testing stuff in the editor.
vagrant grail
@gleaming niche So do you have a solution for me please because when I try to host a game it crashes and give me the error above
gleaming niche
i mean for one thing, you can fix your errors. but since you're using a DS from a main menu (even though it's also saying that the map doesn't exist that you'ret rying to travel to somewhere)
if you're using a DS, from a menu
it starst the DS on the menu.
vagrant grail
what's DS ?
gleaming niche
you can only really test with a DS like that if you start on a map directly
"play as client" is the same as the checkmark for "run dedicated server"
vagrant grail
what's DS please ?
gleaming niche
....... dedicated server
vagrant grail
ah but the problem I tried with "play as client", "play as server" but same problem
and the error says "It couldn't find any player controller"
fossil zinc
Hello guys, I'm trying to replicate a function that moves an actor following a lerp function, which I called from the Tick. However I'm getting an access violation error while I execute, any Ideas? I'm doing this in C++
fossil zinc
My bad, this is how I call the function. Is inside an actor and basically I call SetActorLocation at the end of some calculations. When I call it says that there is acces violation in Get Actor Location. Used to work fine before I tried to replicate it.
fossil zinc
Give me a sec I'll show you. But the crash happended in the get actor location.
fossil zinc
Here is the crash
And is called from my code here
This is how Im doing the replication
And in the server call I only ask for authority
fossil zinc
A previous function sets all the parameters and allows the function to be called on tick.
Just realized that variable is not being replicated
meager spade
yes but MovementTarget is null
fossil zinc
Yeah, I thinks thats why
meager spade
also you not be moving a player with SetActorLocation
you will end up with corrections
the CMC will get thrown out of sync
fossil zinc
Jmmm
I was fearing that since that was code I wrote before going to multiplayer
Any best ways to move actors?
meager spade
actors or player?
actors are fine to move using SetActorLocation
character not so much
fossil zinc
Its a Character. Its a function that moves a player to an specific point over time
A given time
meager spade
i made a special component
on the player (just an actor component)
that does a RootMotion source movement
this is fully predicted with the CMC
you supply target location, time to get there
and player will move to it
fossil zinc
And how do u move it? Are u allowed to use SetActorLocation in a component and then replicating?
fossil zinc
Then how do you make a RootMotion Source Movement? Never done anything like that
meager spade
MoveToActorForce->InstanceName = "MoveToActorForce";
MoveToActorForce->AccumulateMode = ERootMotionAccumulateMode::Override;
MoveToActorForce->Settings.SetFlag(ERootMotionSourceSettingsFlags::UseSensitiveLiftoffCheck);
MoveToActorForce->Priority = 900;
MoveToActorForce->InitialTargetLocation = TargetLocation;
MoveToActorForce->TargetLocation = TargetLocation;
MoveToActorForce->StartLocation = GetOwner()->GetActorLocation();
MoveToActorForce->Duration = FMath::Max(Duration, KINDA_SMALL_NUMBER);
MoveToActorForce->bRestrictSpeedToExpected = true;
RootMotionSourceID = MovementComponent->ApplyRootMotionSource(MoveToActorForce);```something like that
we use the same for things like knockback, dashes etc
(different RootMotionSource
but the same principle
then you start the movement on client, then tell the server to start the movement
and it will be full replicated to all players
without correction using the CMC
meager spade
not really beginner friendly
but it is a proper way to move the player
if the target is on the floor, you could do something even simpler
you can do something like this
Hero->GetCharacterMovement()->RequestPathMove(CurrentMoveInput);```this only has to be done locally
on tick
ignore the name, tho, RequestPathMove, just calls Internal_AddMovementInput
and you can move the player all locally by sending CMC inputs
but this is not done over time
this will be moving the player as if he is applying movement input
RootMotionSource really makes sense if you need to do something over time
just ideas, ill leave you to think about if
it*, if you do decide to go SetActorLocation, just make sure you also multicast it, else simulated proxies will see the player jitter everywhere
fossil zinc
Ok, can I ask how do u multi cast it? I've heard about it but we're still getting into all this Multiplayer stuff
loud jewel
Hey friends!
I'm looking to develop a game where sessions can be hosted or joined, meaning you may be a listen server or a client. I must be reading the wrong parts of the documentation, because while I have an understanding of the different netmodes, authority, role, etc., I don't quite know how to manage switching these models at runtime. What parts are responsible for that? How do I actually start as an offline client and then become a client or listen server afterwards? As far as I can tell, world travel is involved, but I just don't know what flips these specific switches.
Would appreciate a general direction / keyword / tutorial / document that I'm skipping over, etc. Seems like something that should be a bit more known, but I must be searching for the wrong things. Bonus points if whatever resource mentions local (non-splitscreen) multiplayer re: correct network config / management of playercontrollers
Thanks in advance for ... anything!
strong vapor
hold on i got a youtube link for you that's right on target for you i think
@loud jewel https://www.youtube.com/watch?v=XlqHG1egnn0
this is part of a short tutorial series.. the videos before this he shows local multiplayer.. but this video and on are about how to get a game up and running for multiplayer.. hosting a level, using the game instance.. stuff like that
i've followed along with that tutorial and was able to build and play on steam vs my laptop on the other side of the room
loud jewel
This looks super helpful @strong vapor , will give the whole thing a run. Thank you so much!
strong vapor
right on! he also references a pdf file in that video by a dude named cedrik? if you've never gone through that piece of unofficial documentation its great
limber gyro
i would say its pretty official at this point 😂
strong vapor
[Help] using the network profiler.. what are some good numbers for the bytes per sec for like a shooter game with lots of Ai being replicated
PC build
maybe Xbox
loud jewel
Oh dang this PDF is good
This diagram. I drew it out for myself just to make sure I had my shit together when reading the documents. And here it is, but done way better 😩
strong vapor
@loud jewel if you get through that and you cant get a modern version of that plugin.. i think you can make your own modern build of it in your project.. if you have any trouble with that
just have the version of the engine thats the latest one you can get.. and then make a project.. put it in the project plugin folder, upgrade the project to the engine version you like.. and then it'll build the plugin for that engine.. you can take that version and copy it into any project you want
loud jewel
Yeah when I got around to it I figured I'd just read the source. Either way, sounds like a good one. Will try the newer Epic Online Services stuff alongside it but should still tell me the things I know as far as I can tell!
limber gyro
Does any 1 have the link to that ue4 doc that exaplains how to to replicate the look up angle with poses?
i cant seem to find it
strong vapor
i have the code in a project that im working on gimme a sec
here's a youtube search.. the top one looks ok
just skimmed through it
I think i just use a replicated variable.. float to represent the pitch
limber gyro
i managed to find it a few seconds after i asked
i was missing the "aim offset" so i was having a hard time finding it because i couldnt remember the term
feral root
So each of my characters is either an impostor or not an impostor (among us murder mystery game)
so that's a boolean
But for some reason, when a player dies and i have to check if its the impostor, i always get false
Which is odd.
I don't think I have to replicate these variables?
strong vapor
are you making sure to use Switch Has Authority?
sounds like something that you'd only need to know on the server?
strong vapor
[Help] whats a good bandwith kb/sec for a game with players and Ai.. kinda like Sea of Thieves scale.. not many clients.. but a fair amount of Ai stuff being replicated
should i use pawns instead of characters for my Ai? i've been thinking of trying to do that
they look like crap just having replicate movement on instead of having a character inventory component.. i know theres a lot of fancy replication stuff happening in there
vagrant grail
any help please
strong vapor
whats your question?
vagrant grail
check above please
4 hours ago
Please I'm stuck
Ican't move on my project if I don't find a solution
strong vapor
im not really great at navigating this stuff.. if you can repost the text or just re explain?
i dont even know if im at the right level to help you
im only about 2 years into Unreal
@vagrant grail I'll help if i can
plucky crow
ok so im slowly starting to lose my mind
strong vapor
or just put a print statement can help sometimse.. its werid
plucky crow
Why doesn't this shit delete the widget? ^
strong vapor
you might need an extra replicated event in there to mediate?
because of ownership?
im not sure
like.. you're calling a server event on something from a widget
have a server event on the pawn or something
cause the widget doesnt exist on teh server
whats the script that is doing the destroying and the all actors getting
is that the gamestate?
vagrant grail
@strong vapor I'm following Virtus Tutorial on How to do Steam Multiplayer game, but I get an error when I try to test the network part using 2 players, any help please ?
plucky crow
yes,the gamestate
vagrant grail
The thing is the play menu to test your game isn't the same for the network part as the video
I have this
and he has this
plucky crow
its listen server i think @vagrant grail
strong vapor
cause you dont have network ownership of that i dont think
plucky crow
i only want the "admin" to delete the widgets
strong vapor
call that event on the gamestate from the widgets pawn
plucky crow
you know, "start match after teams are balanced"
strong vapor
cause the pawn exists on the server and client.. so when you run Server events from it.. they actually get pushed to the server
you cant call server events from a widget
cause it doesnt exist on the server
so yea.. like a few mediating events on your character or pawn or whatever
one thats just a vanilla event that your widget click event will call... that will lead to a "server" rpc event that goes to yoru game state
plucky crow
that would mean : guy presses a button in widget -> cast to event in player character that casts in gamestate that does the interface?
strong vapor
but your gamestate also .. server doesnt know about widgets
yea.. but just leave the gamestate out of it
i dont know why that would be a thing with closing a widget
plucky crow
some guy told me to use gamestate half an hour ago
strong vapor
either your player controller or your pawn/character should probably own the widgets?
vagrant grail
@plucky crow Aright but I keep getting the error anyway
strong vapor
im not a huge fan of virtus.. but he's probably way better than i am.. im only about 2 years in but i have thought that some of his stuff was a little barbaric lol
plucky crow
@strong vapor probably the pawn or character yaeh
the guy said "Yes.
You can do it in game state
Game state is replicated to all with server authority. So admin can call event that is multicasted to all and teigger once locally instead of watching a variable at tick"
end of quote
strong vapor
ya maybe do an "isvalid" on the widget before you try to do stuff on it.. that'll get rid of the error. but its doing htat cause its not valid.. on the server lol
huh..
plucky crow
so i know how to make the whole game
strong vapor
yea like i said im not a huge authority on this
plucky crow
even the fucking shop and the classes
but
the only thing that i cant make
its the fucking ui
strong vapor
i have some working ui in my rpg game im making
plucky crow
hmm
maybe i can jump everyone to a new map
after its loaded
(like after the admin presses the button)
i think thats how overwatch does it
strong vapor
and im pretty sure its like... i hit a button to interact with a guy... the guy sends my pawn some information about what he's got for sale... that gets passed into a widget thats created.. i click the one i want... it then sends that info back to my pawn.. which sends it ON THE SERVER to the gamemode.. where it sees if i has the money to pay for it
and then if i do.. it gives me the shit.. gives me a bool that says yes he got it
that the pawn receives from the gamemode on the server
and then the pawn sends info BACK to the widget on the client
and the client shuts the menu and sees the item added
plucky crow
ima try your idea with the pawn server thing
strong vapor
and if you're tryin to get stuff workin on steam theres another dude that does a really good one.. really consise.. let me get the link
this guyyyyy
super concise.. doesnt waste your time AT ALL
plucky crow
i know him, i used some stuff from him for the join session
strong vapor
ya he's legit
i like him better than virtus.. but anyone who's puttin out mad free tutorials gets a like in my book
i really like the tomatoes guy.. lol
strong vapor
player controller is a better option maybe if you're doing this in a game menu
im just looking at my logic now and i do mine on the player controller.. but im look at like a shop keeper actor i have
novel hemlock
is passing a pointer to an object from a RPC heavy? what exactly get sent?
limber gyro
@novel hemlock shouldnt be heavy, but i am pretty sure u are not suposed to do that
a pointer, points to memory in your machine, other machines wouldnt be able to use that pointer
fleet raven
depends what is being pointed to
if a netguid is already assigned to this object (i.e. because it's a replicated object, or the server has send a reference to it before), it will send the netguid (~2-3 bytes)
if not, it will send the full path to the object as a string
limber gyro
oh so ur not exactly sending the pointer, just something that will tell the server what to use
i didnt know that
still i never had to send a pointer
novel hemlock
if a netguid is already assigned to this object (i.e. because it's a replicated object, or the server has send a reference to it before), it will send the netguid (~2-3 bytes)
@fleet raven thanks really interesting
limber gyro
Im trying to spawn a particle effect for all the players in the server, some tuts say that you have to use a multicast RPC which i did and i managed to spawn the effect in the server BUT the other players are not seeing it still
if i run without a dedicated server i can see it
ok so i just found out that if i tick the "replicate" box in the actor that it works but i still dont know why, can some one shed some light on this? whould't a multicas rpc replicate regardless?
fleet raven
rpcs can only be sent to clients the object is being replicated to
hollow bane
Is there anyway to test your multiplayer game on steam without joining steamworks and paying $100? Can I still use the Spacewar test if I'm just logged in as a client?
kindred widget
@limber gyro Actors are your basic networking class. What happens when you call a multicast RPC is that more or less your server version of the actor that the RPC is called on tries to tell every client version of itself to play that event. Thus, if your actor on the server and client is not replicated, you simply have a different actor for the server and client that have no identifying way to know that they're supposed to be the same. If it is replicated, they're still two different objects, one on each machine, but they know that they're supposed to be the same actor and that the server's version can send RPCs to the client through that actor. And if the client 'owns' the actor on the server's side, the client can also send server RPCs to the server through that actor.
meager spade
Multicast can be called from a non replicted actor btw
replicated*
only Client/Server RPCs need to have a owning connection for that actor
quick flint
@meager spade u could just spawn an actor on the client and then multicast it, even if its not replicated?
that sounds hacky
limber gyro
i spawned a actor on the server and then called a multicast, so i was under the impression that the multicast would still be called even when the replicated tick box wasnt ticked
i mean, a multicast is suposed to be sent to all player regardless right
meager spade
i never said that
i said a an actor can send a multicast without being replicated
if its owned by the server
then again i think it has to exist on every client (loaded from the package)
i think that is the caveat
shut gyro
Is there a way to get a steam user's name from an ID that is NOT a friend
I see https://gamedev.stackexchange.com/questions/124303/getting-display-name-via-steam-id-for-non-friends which says to use GetFriendPersonaName
but that is returning Unknown for me from a steam user id that I put in that is NOT my friend
meager spade
you can't get friendpersona name from a non friend
dim geode
I would like to make a multiplayer game, that people can sit on a same room and watch videos together etc,
for that i want to use voicechat function, and also web browser, Video player.
what kind of session or service should i use? Amazon Game Lift? epic online service? i see many tutorials based on Steam but people who I will enjoy together will not have Steam account, so for best i would like to use Google account ffor this.
vagrant grail
none want to help me 😦
harsh lintel
I'm trying to do a dash through addimpulse and root motion source, clients other than the owning client are getting corrections (rubber banding) is there a way to debug this?
meager spade
use one or the other not both.
harsh lintel
I meant both individually
feral root
so i want to assign one character a role
or one player a role
random player
and the server would do that, right?
but the server would alwasy pick the listen server because if you cast to plkayecharacter as the game mode run by the serbver it always casts to the listen server?
:(
shut gyro
@meager spade so its not possible then?
doesn't make sense - other games do it
I found out the web api can be used to do http calls and you can access anybody's information through that if you have a web api key
so maybe that's how it is done
where a POST request is done and you get the data on callback
plucky crow
none want to help me 😦
@vagrant grail told you it should be in advanced session, its not about wanting to help , its about knowing shit about multiplayer
i barely made a widget work xd
vagrant grail
@plucky crow what should be in advanced session ?
strong vapor
@plucky crow Did you get that Widget menu thing working?
[Help] I'm having a hard time getting these GameNetworkManager settings to come through.. I've tried restarting the editor and tried deleting binaries and re building.. and i still dont see an effect on my bandwidth.. im trying to lower it first to see if it works.. but i still see it going above my specified limit..
hollow bane
super concise.. doesnt waste your time AT ALL
@strong vapor Such a useful tutorial - got hosting, joining, steam subsystem and health replication all working this afternoon. Thanks for posting!
strong vapor
nice dude!
plucky crow
@plucky crow Did you get that Widget menu thing working?
@strong vapor yeah mate
some guy with 4 years of experience helped me
i had to do has authority in widget, go in game instance , make and call an interface there that calls a custom event multicasted on everyone's controller
now the menu works just as i wanted
will start making the elimination gamemode either today later or tommorow
@plucky crow what should be in advanced session ?
@vagrant grail just compare your settings or just download the copy of the guy's project from unreal
google it
dim geode
google it
@plucky crow
Do you maybe have done voicechat? My voice Chat is Not working in Multiplayer Session (4.25)
plucky crow
i haven't and i don't think i will add one
there is a way tho
to use discord as your voice chat
Law Breakers did that
fossil zinc
Hello guys. We're using the ability system in a multiplayer project and are moving some characters using the Move Component To on the Capsule component to move them around. They move as expected but the camera seems to be lagging a bit (from the players point of view) do I have to replicate any specific variable? We're already replicating movement, not sure if I'm missing something.
limber gyro
@harsh lintel dont use impulses, do a lerp for positions
limber gyro
im trying to spawn a niagara emiter with multicast, its a bullet trace thing, but it is spawning for all the players in the server
why ideas why this is happening?
jagged olive
Can anyone help me get a server set up to receive connections from the internet?
I have the server all good to go but I can't get any ports forwarded properly. I used to do it for minecraft servers n what not but I must be missing something
limber gyro
can you connect remotely to your server? just to make sure its a port issue
jagged olive
I can connect locally
I've just been hosting on my PC for testing purposes
like I was able to get 2 builds going and connected, and could see either client moving around on the other
jagged olive
yeah ik but as far as the server communication with a client it's all clear
and we already tried
can't get a connection externally
limber gyro
so it must be a port issue then
if it is indeed a port issue, you are probably better of searching in google
jagged olive
yeah, I've forwarded several ports and checked with this https://www.yougetsignal.com/tools/open-ports/
and every one has shown as closed
limber gyro
well then, you got ur problem then
jagged olive
yeah, I'm at a loss rn
jagged olive
I think it might just be fkn xfinity bs. They changed the tools so now it directs you to their webpage instead of the standard router page
strong vapor
[Help] Anyone know anything about setting network bandwidth limits? from GameplayNetworkManager thingy in some Ini file? some people say its your engine.ini.. some people say its your Game.Ini... it hasnt worked for me so far.. im first trying to just restrict it just to see if i can get it working
and also if anyone has a good idea for what i should set those that would also be helpful... im doing a medieval game with like a dozen or less clients but with Ai in the world who's actions would need to be replicated in certain cases obviously
hoping to get 100 character scripts with Ability System Components going at once
able to use abilities and stuff and replicate movement
sort of a multiplayer skyrimmy kinda game.. stylized.. really basic stripped down.. but it does function.. im optimizing it right now and its not terribile. but im just tryin to look at everything i can
winged badger
@strong vapor optimization comes after implementing the game
and unless you do something crazy, you won't need optimizations until you hit 40ish AI and 8 or so players
which is about the time you need to start making them
premature optimization is death
we haven't touched our global network settings until we had over 150 AI running around, and the game runs fine with 16 players
@jagged olive any troubleshooting of connection issues begins with reading server and client logs
winged badger
so your server opened the level in ?listen mode and never received a connection request
and your client timed out
jagged olive
It's port shit
No the client presses connect and no logs happen on either side, but local connections work
winged badger
also, when it logs the entering listen mode
"listening on port XXXX"
in the logs
that port has to be forwarded to the PC hosting the game on your router
jagged olive
I tried
winged badger
doesn't matter if clients port forward or not
winged badger
so you logged into the router via its web API from your PC
jagged olive
yep
winged badger
you pulled the PCs local IP address
jagged olive
but xfinity changed their portforwarding tools
so it brings you to their webpage and it's dumbed down
winged badger
and forwarded the TCP/UDP port the server is listening on to servers IP address?