right
#multiplayer
twin juniper
did you make the variable in C++?
small temple
nope
twin juniper
mkay, make sure the replication settings for the var is set to default
manic pine
whats triggering the timer
manic pine
through an rpc?
manic pine
then how does the client know about it?
small temple
because the server updates a replicated variable
manic pine
hmm i dont quite follow... what exactly is to the left of the timer in your bp?
small temple
gamemode bp
i'm totally lost on the whole networking thing again since the screenshot i posted earlier wouldn't work
and all my attempts before that
manic pine
right the previous screen was what i was referring to
small temple
just does not compute anymore
oh, to the left of that time is beginplay
or was, because it's gone now
the timer, not beginplay
manic pine
right so you started that timer on both server and client
small temple
i think i tried running it on client/server only
because yeah, it should only run on the client if i'm doing it that way
but i think that didn't work at all
small temple
print other player's timers on screen
manic pine
right, so at every x second interval you send rpc to server with client's current time
small temple
that's what i was doing, yes
before i started trying to do it on the server
i'm not sure what the best way is anymore either
manic pine
if the server already has the client's time, then obviously thats the best way
small temple
i mean, since movement is clientside
the timers might not be accurate if i do them serverside
actually nnnnoooo that shouldn't be the case
urgh i'm so confused
small temple
yeah it should be like spawn > latency delay > race starts/timer starts > finish race > still latency > race ends/timer ends
anyway
that doesn't really matter
manic pine
thats hardly a big concern though, you have access to latency
small temple
the point is, my timer doesn't work no matter how i do it lol
manic pine
decide on a way you want to do it and it shouldn't be a problem
small temple
well, neither way seems to work right now
do you see any reason for the second example not to work?
just to be clear, it does work fully on the server
manic pine
the starttimer thing not working?
manic pine
that seems to be a server rpc which you are calling from the server ye
small temple
yeh
manic pine
do server rpcs work when called from server? in blueprints i mean, they do in code
it says (if owning client)
small temple
should work
twin juniper
yes they work
twin juniper
!
manic pine
well you'll hvae to show the start timer event thing then
small temple
ok
raven viper
So you have a timer in PlayerState, correct? That is actually good. PlayerState is AFAIK owned by server, and then replicated to all clients. However, setting a variable inside them, can only be done via Server, to have that value replicated to all clients. Also, you can access other player's PlayerStates as well from GameState->PlayerArray
raven viper
So in your case, it would be
small temple
witness true blueprint prowess
manic pine
intense in my mind sounds like a bug trap ^______^
raven viper
PlayerState -> RunOnServer Event -> Start Timer -> Promote to Variable (Replicated)
manic pine
oh, irony
raven viper
Then actually you can read from other PlayerStates, to get the updates on UI
No need to RPC all around with values
small temple
that's in a component on playerstate, yes
manic pine
right, so the only problem here really is that timer var is not being replicated
small temple
yep
@manic pine CurrentRaceTimer is being replicated and that's the one i'm reading
raven viper
You can just make a Server_CustomTick(RunOnServer/Reliable) event, and put the calc there, and call that on the tick, to make sure you are actually running it on server
small temple
yeah
raven viper
What is that parent ref again?
small temple
the PlayerState
manic pine
your component is allowd to tick?
manic pine
right, what if you fire off a log entry at the end of the tickevent chain
small temple
@manic pine good point though, need to make sure to let it tick on dedicated servers
manic pine
ye
raven viper
Also, as he said. Smash dat shite with PrintStrings, so you will exactly see what runs and where
small temple
yep
raven viper
Also be careful with reliable tick events, those will kill your RELIABLE_BUFFER in no time
manic pine
ye also makes no sense to have this be reliable
since a lost package in this case is useless
time is outdated already
raven viper
So, you get printed the timer value, and it's all good?
small temple
oh yeah, drawing it to the hud and it's all good, but only on the server
raven viper
And how is the drawing done exactly?
small temple
the widget gets the variable on a timer
raven viper
I mean, where does it happen? UMG Widget?
manic pine
so player state's component is replicated, var is being updated by server, and the var itself is set to replicate...
raven viper
Okay, good news bad news :
Try This:
Multicast_SetTimer (TimerPin) -> Set Timer (TimerPin)
Server_SetTimer -> Multicast_SetTimer(Get Timer -> TimerPin)
And call that
Basically a manual variable replication to all clients, just see if it actually replicates something or not. We've seen a few cases where values set by the server on a replicated class and a replicated variable, are actually not getting replicated to the clients.
Even though they should.
small temple
hmmm
raven viper
Tho this multicast event will set the same timer on all playerstates, so it won't be good for your goals, just eliminating the possibility of the replication issue
small temple
and you want me to update the replicated variable on the timer right?
so yeah, i think i get it
hold on
raven viper
Yes, and you can turn off the replication for that variable
Since you are already manually replicating it
If you get ANYTHING on clients, it's a rep issue, so make sure you re-check everything. CanTick, Always Relevant (not only for owner), Component Replicates, etc etc.
small temple
how do you want me to run the timer event?
raven viper
You mean the Server_SetTimer?
You can pop that into the tick, and see if your HUD updates
inside PlayerState ofc
So it will be like:
EventTick -> Your_Current_Logic -> Server_SetTimer
small temple
oh yeah, forgot i can link it to tick
oh no, i'm confused
can't link a timer to tick of course
small temple
yeah but he said "pop that into the tick"
manic pine
the value youre now trying to replicate, send it with a multicast
small temple
but i can't pop that into the tick ๐๐
small temple
ah that's just confusing me more raap ๐
small temple
right i already forgot about the pins
raven viper
If you get anything on clients, your logic is sound, and it's a replication issue.
small temple
sorry if i'm a bit slow but i'm really sick of dealing with this stuff
raven viper
I mean the timer changing logic is sound, might be a var replication issue, a wrong call of events, and other numerous stuff
But again, be noted: This will change ALL PlayerState timers to a single timer value that you started on server, hence will not work for your final purposes ๐
Also avoid manual replication on tick.
manic pine
only on that specific playerstate
raven viper
PlayerState AFAIK is owned by server, so run on owner won't work. However you can ID them always and do it like that. But again, this is just to test, nothing more. Don't even plan on keeping it ๐
small temple
so you want me to just print TimerToReplicate and see if it's correct right?
small temple
so like this
raven viper
Yep, it should work.
small temple
yeah, it prints the exact same stuff as my hud
raven viper
So server is okay, but on clients it's nada?
small temple
yeah i'm not sure what the deal is with prints btw
sometimes server prints show up on clients and other times not
this is one of those times where it's not showing up on the client
i'll see what happens when i get the variable from my hud
still 00:00:000
hmmm
well that makes sense since the variable isn't replicated ๐คฆ
raven viper
Nah,
raven viper
If you manually replicate it, there's no need for it to be rep as well, since you are setting it on all clients
small temple
right
raven viper
So how do you start this CreateTimer event exaclty?
Like where you set the start timer, and the bool?
Where does it get called?
And how, more specifically
small temple
gamemode calls BeginTimer which sets the IsTimerTicking bool
raven viper
Can you pop me a shot?
small temple
i pasted it above i think
manic pine
could you try setting your time var to replicate with notify
raven viper
Is that controller casted?
manic pine
then do a print on notify
small temple
@raven viper what controller?
@manic pine trying that but actually running into a weird issue, hold on
raven viper
The one you are getting the PlayerState from?
small temple
@raven viper no it just gets the owner (PlayerState) and casts to it
raven viper
Can you show me how and where are you exactly calling that BP?
small temple
@manic pine i've never seen this before but if i do a 0 duration print, it doesn't show up on the client
otherwise it does
you mean this @raven viper ?
raven viper
No no, I mean
small temple
oh no, you want to know where i'm calling the timer bp?
raven viper
In GameMode
Where you start it
You sent the pic of a custom event. How is that event getting called and where?
raven viper
The ClientBeginRace
Where do you call that?
Also that GetPlayerState node doesn't look good, you should be getting one that looks like a variable (replicated)
Like so.
small temple
@manic pine i guess that's because it's not replicating every frame eh
@raven viper the gamemode calls ClientBeginRace
and the GetPlayerState node gets a casted playerstate, i know i need to clean up :<
raven viper
If you get from the controller, no need to cast.
Plus that's specific to player, so this might be the root of your issues
small temple
it's a custom PlayerState so i have to cast if i want to access its custom events, don't i?
but yes, it's meant to be player-specific
btw that does work @manic pine
the client prints the correct times
raven viper
I might have a feeling that the Tick in GameState runs on client
And since the variables you originate from are not replicated, your client overrides with 0-0-0 and you get nada at the end
Server Tick -> Set correct var
Client Tick -> Override with NULL
manic pine
yeah except he had an authority check on that one
do you have any other events that uses that var in some way?
raven viper
It will be true
manic pine
it'll only be true on listenserver
raven viper
Since he is not using SwitchHasAuthority, but HasAuthBool on the Parent Ref, which is the PlayerState there
small temple
nope, can't think of anything that would override it
this var gets set in the timer component and nowhere else
manic pine
hes dealing with dedi yes
small temple
and i'm testing on a listenserver btw
small temple
brb real quick too, gotta get a snack
raven viper
Then basically your Tick is overriding
Make sure that's only ran on server (calling a custom event, etc) and you will be good to go
manic pine
wait even there its not actually a problem, since in that case
raven viper
Since RepNotif printed good values, and you are only changing there, it's kinda obvious
manic pine
timer would be started on both too
raven viper
Nah, he got a custom event for timer start from GameMode -> Only Exists on Server -> Only Server Timer starts
Just auth that tick properly and all good
And that is a good final note for me to get to bed, 3 AM, gotta get up early. Hope you get it fixed! Gnite!
manic pine
yeah but listenserver is server
small temple
i'm gonna replicate these cookies into my stomach
small temple
night @raven viper thanks for the help
manic pine
no it wouldnt
small temple
so clawsome was saying i should run a custom event on server every tick?
i guess i'll try that
yeah it doesn't work
manic pine
if your repnotify for your var is printing the right value on the client
then its obviously being updated correctly
manic pine
you need to find all places where your var is being used
one of them has to be writing over it
manic pine
so the client never touches it ?
small temple
it shouldn't
oh i bet i know what it is
actually no, i don't
i thought maybe i was caching the playerstate too soon on the widget
but i already put in a delay for that
small temple
in the timer component?
manic pine
in that bp above
small temple
after the call to ServerTick?
manic pine
right
small temple
well regardless of where i put it, it does that thing again where it doesn't print on the client if i set the duration too low
but yes, before the call it obviously prints on client too
manic pine
huh what duration
small temple
print duration
small temple
well it's just 2 clients so
same thing except i don't see what happens on the server
manic pine
right, but whats the pure client printing out
small temple
server messages
or also client messages if i call the print before calling the ServerTick, like i said
manic pine
youre printing the TimerCurrentTimespan var yes
manic pine
i dont mean down to the millisecond, just 'after 10 seconds it prints ~10'
small temple
with a duration of 0, only on client 1 btw ๐ค
manic pine
duration?
small temple
print duration
manic pine
set print duration to 2 seconds, set value to the var
small temple
yeah...
small temple
apparently
but my UI works fine on server
and this is the total extent of the widget graph
it's a user widget that gets added to a list dynamically on construct
with a delay, because otherwise only the server gets one
small temple
eh, well
what i mean is the server only gets a widget for itself
because it creates the widget before the client loads in
otherwise it's anything but dirty ๐
it does happen all clientside
small temple
why?
manic pine
where and when is the widgets made
small temple
i have a HUD widget which holds HUD elements as individual user widgets, including a PlayerList widget that dynamically creates PlayerListItem widgets inside of itself
the HUD widget is created in the HUD object
manic pine
right, and playercontroller creates the standard hud object, everything fine so far
why exactly do you need the delay
small temple
oh because the player list isn't quite dynamic enough yet
it only gets the list of players once at the start
so the listen server would create the list before the client connects
and the client wouldn't be in the list
i was going to fix that up once i got the timer replication working
small temple
๐คท
manic pine
add a print in the widget
small temple
i did, it prints
manic pine
between update and set text
small temple
here is the playerlist bp btw:
oh except the delay shouldn't be set to 0 of course
just did that a couple minutes ago to test
manic pine
yeah you prolly want some kind of multicast instead, when a player joins and leaves
to tell clients to update their list
manic pine
it wont
whats the print say?
is the widget on the client reading the correct value too?
small temple
sec
no, it prints the default time on the client
as expected
the SetText node isn't broken lol
manic pine
so your playerstate tick is printing the correct value
and your widget printing the wrong value
manic pine
eh whta a mess, i have to go to bed but i have a simple workaround for you
instead of running your widget update on a timer, just do
OnRepNotify -> call widget to set time
small temple
yeah i have to go to bed too
manic pine
since we found out rep notify worked
small temple
i was thinking of that too
manic pine
doesnt explain whats wrong, but at leasst it should provide a working thing so you can move on
manic pine
np, good night
small temple
night
shy nymph
Really quick, does someone has any experience with Steam Cloud Storage? If so, can i easily Work with Unreals "SaveGame" and upload / Download that one to the steam cloud storage to maintain player settings like selected skins and such?
twin juniper
@shy nymph That's a good question... I would like to figure that out as well
Seems like it's possible
zenith yarrow
I cant filter search results using FOnlineSessionSearch queries, all available sessions are being returned rather than those that meet the criteria, this is a gist of what I have done,
while creating a session...
SessionSettings = MakeShareable(new FOnlineSessionSettings());
SessionSettings->Set(SEARCH_KEYWORDS, MatchTag, EOnlineDataAdvertisementType::ViaOnlineService);
I feed a fstring that has "1V1" in MatchTag...
And, while finding sessions,
SessionSearch = MakeShareable(new FOnlineSessionSearch);
SessionSearch->QuerySettings.Set(SEARCH_KEYWORDS, MatchTag, EOnlineComparisonOp::Equals);
Here, I pass-in "2V2" in MatchTag
Now, where no session result should show-up, I can see "1V1" session when I search for "2V2", can anybody help me understand what is happening here ? why are the SearchParams not being used ?
twin juniper
Hey anyone knows how to replicate destructible meshes in mp? Would like to hear an answer in like 1 or 2 hours please.
Please anyone?
Ok I then just think I can make a BP with dm and set it to replicate
bitter oriole
This isn't a hotline, and your question is too vague. If you tried something and that doesn't work like you want it to, tell us about that
twin juniper
K
cursive shard
Hi everyone, UE4 offers linear and exponential smoothing for multiplayer games. Can I ask if anyone has some experience about how to choose between these two?
cursive shard
@pallid mesa Thank you very much. I think the linear one looks the best to me. In my own test case I've also noticed that the linear mode handles rotation smooth much better.
Through looking at the engine code, I think basically they are just two different ways to interpolating between two transforms(positions and rotations). (Please correct me if I am wrong. Thanks in advance)
pallid mesa
Yes, the way you interpolate positions by net update is basically interpolating between two given positions for the other clients to not see rubberbading due to network hiccups
Velocity, rotation, position are usually the most important values to have in mind to interpolate
So you are choosing the way you are interpolating
cursive shard
Thanks, I am little confused about this piece of code. So why the Linear smooth mode makes a lot less sense under the typical high update rate
pallid mesa
Thats probably something you'd come to a conclusion testing
cursive shard
Alright, I'll do some more tests about these two modes and see if I can figure out something. Thank you very much. If I can get something useful I'll talk about it here.
ripe raptor
Hey guys, does anyone know maybe why Steam isn't working in my Release build?
It works if I go Play -> Standalone from the editor
but not in my packaged game
I do have steam_appid.txt in my root game folder (should it be somewhere else?) with my AppID
(The steam_appid was in the wrong folder)
zenith yarrow
@ripe raptor did you try to update steam in the engine ?
ripe raptor
I figured it out, the appid.txt was in the wrong folder :p
It tells you to put it where the game binary is, but it means the GameName/Binaries/Win64 folder, not the game's root folder
zenith yarrow
gotcha, thanks for the info, but I did not need the txt file, because i had the appID in DefaultEngine.ini, is it better to keep it in a txt instead ?
ripe raptor
You have to have it in the txt for a packaged build
the defaultengine.ini only works in dev builds and editor
small temple
@manic pine @raven viper apparently Date Time and Timespan variables don't replicate
zenith yarrow
@ripe raptor OK, by packaged build you mean the shipping build, right ? because it is working for me in a packaged dev-editor build ?
manic pine
@small temple didnt we discover that repnotify worked?
small temple
@manic pine ah yeah, good point
i guess they don't replicate outside of their actor or something
either way it's not the widget for instance, because i also tried to replicate to my playercontroller and that didn't work either
so i looked it up, and other people are having the same issue
it didn't occur to me to look it up yesterday ๐คฃ
manic pine
wat, youre saying you cant even replicate a var on the playercontroller?
small temple
i can't replicate the var TO my playercontroller
manic pine
you dont replicate with a destination though...
small temple
no but i'm getting the var from my PC
anyway there are workarounds
like breaking the timespan and replicating the ints individually
small temple
lol?
manic pine
only one class can replicate
and thats Actor(and sublcasses)
for the others you can replicate their references, but not replicate their internal values
zenith yarrow
I found out the problem with the session search queries not working, if anyone stumbles on it, LAN Queries are not being filtered by the search settings. But if I use steam and create online sessions(not lan) they are filtered correctly. I have no idea why that is the default behaviour but I am filtering the recived results in OnFindSessionsComplete() like so for now,
if (SessionSearch->SearchResults.Num() > 0)
{
for (int32 SearchIdx = 0; SearchIdx < SessionSearch->SearchResults.Num(); SearchIdx++)
{
if (bIsLanSession)
{
for (auto setting : SessionSearch->SearchResults[SearchIdx].Session.SessionSettings.Settings)
{
UE_LOG(LogTemp, Warning, TEXT("Key : %s , Value : %s"), *setting.Key.ToString(), *setting.Value.ToString());
if (setting.Key == SEARCH_KEYWORDS && setting.Value.Data == MatchTag)
{
// Yup this is correct LAN result, join it or add it to a array
}
else
{
//Not the session you were looking for
}
}
}
}
}
actors and actor components*
small temple
PlayerState is a subclass of Actor
manic pine
yes, and playerstate does replicate
small temple
yeah, so?
manic pine
yeah, but any objects inside it that are not also actors/actorcomponents, wont replicate their internals
small temple
well, my race timer is an ActorComponent
manic pine
right, and the actual time is?
small temple
the Timespan variable?
manic pine
ye
small temple
it's a struct...
manic pine
thats a struct
small temple
of ints
manic pine
not based on Actor
not based on ActorComponent
ergo, it cannot replicate its internals
small temple
ohhhh i had no idea that was a thing
manic pine
yeah, its the entire point of the Actor class, to provide replication
manic pine
you need a number of functions and whatnot for the replication stuff, functions the non-USTRUCT structs dont have
manic pine
structs can have functions
small temple
it doesn't make sense to me
how is a struct anything more than a collection of variables?
manic pine
in c++ there's little difference between struct and class
in ue4 they've made them a bit different though
small temple
but then how come you can replicate a transform or a location or a rotation but not a timespan?
because those are part of AActor?
manic pine
i think those are done a bit different
small temple
right
manic pine
i think it should be possible to get structs to replicate properly hmm
maybe its just timespan that doesnt have support for it?
small temple
Timespan and DateTime
manic pine
neither works?
manic pine
i think they should if you provide the necessary uproperties
anyway why not just switch it to a float
keep the timespan on the server, but use float for replication
no need to replicate the entire struct
yeah, i see in the code the FTimespan struct is not a USTRUCT at all
manic pine
yeah it only has a 64bit int member from what i can see
past bear
64 bit might be a problem for replication, but you might only need 32 bits worth of information
small temple
yeah i'll do something like that
but i wanted to avoid having to rebuild the timespan from a single number
just want to get stuff working quickly
can't do that if i have to bring out my shitty math skills
manic pine
well, at least this explains it
small temple
ye
manic pine
shouldnt be hard finding a workaround
manic pine
so youre now running player time on server ye
small temple
yeah...
maybe i shouldn't though
because i need the timer to update really fast on the client
so i'll have to do a separate client-side timer too...
manic pine
and now its only updating on replication
small temple
yeah
manic pine
you did limit it in the widget didnt you
small temple
that too but actually it isn't necessary
manic pine
you wouldnt technically need a timer on the client then
small temple
anyway i guess i shouldn't run the timer on the server only, and then use the original timespan for the local clients but the replicated one for remote ones
small temple
oh that's a good point, lol
manic pine
simplifies things a great deal ye
small temple
or is it? the widget would get the client time
but the server would set the start time
so they might not match up
manic pine
on the server, set starttime to now + client latency / 2
small temple
latency varies though
manic pine
its an average latency
small temple
not good enough for a racing game...
manic pine
you might also just wanna keep time on client
so server just tells client when to 'start'
small temple
that's what i wanted to do yeah
manic pine
then every once in a while, you send an rpc to server with client's current time
so server can replicate it to other clients
small temple
it's not working though...
so before, i had the gamemode call StartTime, which ran on the server
ehh wait maybe i messed something up
oh yeah no of course
pliant cypress
Hello good people of the internet! :)
I got a weird latency issue and I was hoping some of you can give me advice how make it to work correctly.
When I move Cards from a Position to another (ex from Board to Discard), there is window where I change the Card's Values. It's when I have already copied the data to the target Position but haven't deleted from the original position, so the Card's data exists in both. That is when I change the Position ID on the Card, everything else remains the same. It works fine for the server, but the client receives the info with some latency, and it messes up the client side with blank cards because the data is not there anymore.
Is there a good solution for this? Any advice is greatly appreciated.
thin stratus
@pliant cypress Either use OnRep functions/Variables
Or use an RPC
Generally, Clients only need to know the ID of the card and any value that might change during the game
All other information, like text or images etc, should be in a datatable
And the only thing you replicate is a struct that contains the TableRow (ID) and whatever values change during gameplay
Idk how your game works, but I assume you have Arrays with cards
So Array of Struct it is
thin stratus
Yeah so, when you need something to be done only when the variables are replicated, use a repnotify
Or an RPC to send the change
pliant cypress
Im not sure I can replicate the frontend though, as it is different for each player. for example the player can drag a card with the mouse, move it around and drop it back to its hand (not making a move) and the other player shouldnt see that
thin stratus
I'm only talking about the backend
pliant cypress
backend work fine, this problem is frontend only. I have a visual feedback of the backend and the data is there, but the frontend doesnt seem to follow all the time.
I can put in a delay to make it work (it does I tried), but it looks a lame solution and Im afraid it could later mess up the frontend completly
thin stratus
No delays
That is in fact 'lame' :P
Especially when a person has a higher ping
As said, you need to hook it up to OnRep or RPC
Owning Client RPC makes sure it's not happening on others
And OnRep variable can be set to ConditionOwnerOnly
pliant cypress
OMG
I set it to reliable and it worked like magic and rainbows
it is like a second Xmas :D
twin juniper
how to replicate actor spawn
ripe raptor
If I save the game and I'm connected to Steam, will it automatically save to cloud?
or do I have to do anything extra?
thin stratus
You'll have to actually save to the cloud
Check the OnlineSubsystem Interface if it has any Cloud saving functions
Otherwise you'll have to manually hook into it via the steamapi header
late sundial
i have a problem with multiplayer, client player characters are lagging on a movement terribly, all stuff is set to replicated, is this right way to do the movement replication? i havent tried this over online yet.
or should i go with "switch on authority", and what about that float value does that need also replication through the nodes?
pallid mesa
if your character inheritates from character class you don't need to replicate movement since character movement component does it for you
late sundial
its just basic character with custom controller, movement component is set to replicated, all update frequencys are default
with those settings the movement is stuttering
and parent class is character yeah from top right
late sundial
gonna check tomorrow more of this its time to go ๐ด
ripe raptor
@thin stratus - a bit late but thanks for the answer.
pallid mesa
just get rid of those "server" character and plug directly the add movement input into the axis inputs
small temple
guys, what's the best way to update UMG widgets in response to server-side events?
like say, if i want to update a list of players
i need to update it when a player joins
my first thought would be to use an event dispatcher, but serverside event dispatchers are only serverside so that doesn't work
do i really have to go and add custom client-side events and dispatchers for everything or is there a better way?
hazy haven
onrep event for the player list?
small temple
heh, good timing, i was just looking
that's how i'm doing it right now actually, for something else
but i don't like it because it's yet another event dispatcher
also the standard playerarray that comes with gamestate isn't replicated so i'd have to make my own and so on
none of this is a huge deal but it just seems like there must be a better, cleaner way
also by the way, if i do it onrep, that doesn't work on listen servers, so then i need a second dispatcher for those...
hazy haven
i get ya. maybe there is a better awesome way, but im not sure what it is!
inner iris
Anyone have access to the pull request shown in this tutorial? https://wiki.unrealengine.com/Using_Steamworks_with_UE4
Working on getting dedicated servers to show up with steam but it looks like the engine code changes are behind that pull request which seems to be a dead link now
brittle sinew
It seems to be 500'ing at the moment, but I've seen the pull before
inner iris
@brittle sinew 500'ing as in temporarily unavailable?
brittle sinew
inner iris
Yeah it does
I figured the pull got rejected and the link died or something, but not sure how it works
I had thought it'd stay regardless
brittle sinew
Rofl, changing the pull ID to 2134 or 2136 works fine
ยฏ_(ใ)_/ยฏ
Couldn't tell you, sorry
inner iris
No worries! Hopefully can find another way- this seems to be the only discussion / wiki around getting dedicated servers to show in steam
brittle sinew
I know it was a super long discussion, and all of the PRs seem to be loading pretty slow
It might just be that it's taking too long to load and timing out on the server, dunno
(well, now that I look back at the message I seem pretty dumb)
Haha.
inner iris
Iโll try to contact the original author and see if he has the code elsewhere! Seems like a topic that is very hard to find official docs on
pallid mesa
Im interested aswell, ask them if you can contact them if they could please update the wiki
Thanks
inner iris
Will do!
lost inlet
from what i remember of that pull request it made a bunch of online subsystem interface changes and iirc i don't think they were all necessary
that PR loading bug on github has been an issue for like 2 weeks now
late sundial
@pallid mesa it was like that at beginning, and the character movement lag was there ๐
not on server player, but all clients
burnt meteor
-------------------------------
Player is spawing correctly in editor, but not in standalone game
i am using World Composition Also(if that make any difference)
pallid mesa
Enable on character movement component linear interpolation
Are you modifying location or something or something?
inner iris
@pallid mesa ok I have searched around and finally got something: https://github.com/EpicGames/UnrealEngine/compare/release...Scienziatogm:release
Seems the link is invalid but his repository is still intact
@lost inlet can you recall what wasn't necessary? Going to attempt to make this work now
manic pine
is it possible to have a uobject(not actor) replicate as a member of an actor in the same way a ustruct would?
inner iris
@twin juniper Is the weapon class replicated?
manic pine
what if you try in your Weapon bp to add a beginplay-> authorityremote->print message
twin juniper
@manic pine and print it only from authority or both?
twin juniper
it prints
twin juniper
mhmm, im setting a mesh at beginplay depending on what weapon it is
ok nvm works now
@manic pine now it works fine, had to set weapon data var to replicate, it stores the mesh too
manic pine
right, clients beginplay didnt have it and couldnt choose a mesh
twin juniper
do i have to do the same for barrelID, sightID, railID? what im setting in expose from spawn?
manic pine
that seems likely...basically anything that's not part of the class defaults
because thats all the client has access to
twin juniper
oh i made all those attachment ID vars replicate in MyCharacter and now all players can see the selected attachments on the gun player is holding
๐
manic pine
very neat
late sundial
hey, i asked this same thing yesterday and havent found any fix for it yet. on multiplayer my characters movement is laggy on clients, server host sees everything smoothly
i have done replications to character and its components
oh looks like those replications are default, but anyways
client has laggy character and it sees other players very laggy also (other characters have same settings)
elder sable
If i replicate an actor managed by a ChildActorComponent, do i have to replicate the component ?
icy nacelle
Trying to replicate a drag and drop when a client drops an item infront of another client (dedicated server game). Item does not show up for both players. Can someone show me what I'm doing wrong? I've added a custom event for running on server.
Any help would be much appreciated ๐
(I believe I can avoid these problems by using the SpawnActor 'Owner', but I am not sure how to go about this)
manic pine
youre calling a server rpc on a client-side only object
try moving your "ReplicateToServer"(rename it to something more descriptive) to your character class or maybe your controller class
small temple
@manic pine
i'm trying to do a dynamic player list that updates when players join/leave
i've tried multiple methods and i can't get it to work
basically because of the damn listen server following different rules than the clients
you got any ideas?
manic pine
how you attempting to do it?
small temple
first i tried to update the list for the clients with an onrep function
and for the server too actually
but the server gets added to the list differently from the clients
so i tried to do it OnPostLogin for the server
that doesn't work for whatever reason, couldn't figure out why
then i also tried doing it on PlayerState BeginPlay/EndPlay
that doesn't work at all, although i think i just realized why
it's an annoying issue because it should be really simple, it's not like i don't understand it like with the replication stuff or whatever
it's just an enormous fucking mess
so i'm mostly wondering what you think would be the best way to do that
manic pine
have you looked at GameState?
small temple
yeah my player list array and onrep function for it are in my gamestate
manic pine
i havent actually used it myself yet, but it seems a bit weird to me... it has a playerarray, yet from what i can see it's not actually replicated?
small temple
exactly
manic pine
UPROPERTY(Transient, BlueprintReadOnly, Category=GameState)
TArray<APlayerState*> PlayerArray;
small temple
it's not replicated but it is the same for clients and server
manic pine
and the function AddPlayerState is not a client rpc...
so the playerarray is actually up to date?
small temple
yeah but it doesn't have an OnRep function so i can't know when it updates
manic pine
right.... but how is it replicated?
manic pine
yeah but when a new player joins, it needs to be updated
if the array isnt replicated, and not the AddPlayerState function...
small temple
๐คท
manic pine
is it some kind of magic
small temple
yes that would make the most sense
manic pine
because this would be the obvious place to put anything related to ui player arrays too
as youve already thought
small temple
well it's not a big deal because i can make my own player array
even if it's a pain in the ass
and doesn't work for some inexplicable reason
manic pine
youre making your own replicated array?
small temple
yep
manic pine
whats the declaration?
oh youre bp eh hmm
whats the contents of the container
the types
small temple
player controllers right now
manic pine
yeah thats no good
small temple
the gamemode calls the gamestate to update the array OnPostLogin btw
manic pine
cant give clients access to other clients pc's
small temple
ehhhh?
it's just a list of all the PC's in the game right now
it doesn't give you access or anything
manic pine
yeah, other clients should never have pcs not their own
they also come with Only relevant to owner, by default, so they wont replicate
small temple
buuut i can get their playerstate though, right?
small temple
right, that's what i'm doing
no i mean i can get the playerstate from someone else's controller
but anyway no big deal, i can change the array to hold playerstates
manic pine
the array should only ever hold playerstates
small temple
it's just a bit messier down the line (literally in visual terms)
manic pine
well just an extra getplayerstate when you make the container ye
small temple
yeah
manic pine
right, assuming thats changed, what exactly was the problem
small temple
hold on, i'll fix this first
manic pine
yw
small temple
@manic pine i think i can get it working
for some reason the widget isn't receiving my OnLogout dispatcher from the gamemode though
but i can work around that
i think...
manic pine
youre calling on a widget from gamemode?
manic pine
haha yeah i was starting to wonder for a minute
the way i imagined you'd do it was onrepnotify with the player array
small temple
lol
i do it with an event dispatcher which fires onrep (for clients only) and also whenever the array is updated
manic pine
why not exclusively on array update?
small temple
OnRep functions don't fire on servers
manic pine
on listenservers? hmmmmm
small temple
yeah i know
manic pine
thats a bugger
small temple
at least i can use a single dispatcher here
hmmm i said "here" because i thought i couldn't do it with a single one somewhere else but i think i can and now i feel stupid
manic pine
onpostlogin add player to array then call listenserverupdateui and onnotify updateui ye
and listenserverupdateui and clients updateui can be the same
manic pine
hmm maybe, how are you doing it on listenserver right now?
small temple
i mean i just call a universal dispatcher that describes what happens
like when my player list gets updated i call OnPlayerListUpdated
and then anything else in the game can bind to that
i don't have a separate, specific dispatcher for UI
anyway this doesn't matter, i have a problem
wait it's probably a UI problem
manic pine
the player list update could, theoretically, be used for more than just ui
so its not necessarily ui specific ye
small temple
right
manic pine
its prolly fine, which class has it though?
small temple
gamestate
manic pine
ye sounds good
small temple
yeeeeeee
trail bloom
Guys are the Simulated Proxies being extrapolated (dead reckoning) or does the CharacterMovementComponent interpolates between the last 2 known positions?
small temple
my god, it finally works
frank quartz
http://www.tomlooman.com/ue4-cpp-multiplayer-course/ launches early next week based on the email i just got
burnt meteor
@Apst#8432 and @raap#5040 i see u two always chatting lol
grand kestrel
Can I get some advice/info on multiplayer inventories? Here are my questions or concerns
- How do you handle the shuffling of inventory via requests made from UI? Do you get client to test that it's possible, then send to server?
- How do you handle validation and corrections?
- When/where do you setup the UI following an event, such as splitting a stack, picking up an item, etc?
- Naturally I'll want to be replicating the inventory and not using multicast, so is there a convenient way I can simply detect changes? Is it logical to replicate both the inventory and a 'pending modifications' array?
I think I have basically the right idea in my head and some on paper, but want to check how other people are handling these things
fossil spoke
If it was me, id create an inventory as an component. The inventory itself would just be an array of objects. The UI would be an completely seperate layer, all it does is visualise the information inside the array and delegate any drag drop or swap requests to the inventory component. Multicasting an inventory is unnecessary if all important actions are performed server side.
@grand kestrel
You should only really need to tell the server when an item action occurs
Pickup, Drop, Swap whatever
grand kestrel
The reason I'm considering doing it on both is that it would allow for instant feedback, wouldn't have to wait for server
fossil spoke
Yes thats fine, but whatever the server returns should always be corrected on the client.
normal raven
Anyone got a good way of replicating a rendertarget with blueprints? I only need to replicate it once per client, when they first join. After that I'm replicating inputs, but I feel like making a huge array of inputs and looping through it when you first join isn't the best solution...
burnt meteor
@here i have bought a static ip from my isp and i have a dedicated server now what should i do?
fossil spoke
The Mods are not here to answer questions at your whim. Please only ping us if there is an issue.
burnt meteor
sry
fossil spoke
Someone else maybe able to help you.
burnt meteor
alright.
fossil spoke
An little more information on what your trying to achieve would also be helpful.
burnt meteor
like??
fossil spoke
Your statement above on its own may have context to people you were discussing it with before.
burnt meteor
i have never see anybody discuss this before
burnt meteor
@here i have bought a static ip from my isp and i have a dedicated server (which is built from ue4 source v4.17)
I want my friends to join
now what should i do?
buy server?
i bought a static ip
not server
fossil spoke
Ok well that gives some more context now doesnt it? You want to play games with your friends on your own game
Have you built the Server executable for your game yet?
burnt meteor
yes
its working as u see:
but i have not port forwarded
i want a experienced person to help
fossil spoke
Experience doesnt come for free. If you run your server executable your friends should be able to join if you give them your IP address
fossil spoke
Then port forward
burnt meteor
ok
@fossil spoke but i have a problem, i got a static ip from my isp so what ip should i use to join in ue4?
grand kestrel
@fossil spoke Before I forget (I'm swamped!) thanks for the info ๐
burnt meteor
ok
fossil spoke
It will tell you your public IP address
Which should be your Static IP which is what you use to connect
burnt meteor
so when i buy a static ip from my isp all the pc's in my net become static and the same?
thanks ๐
fossil spoke
No your Router has an Static IP
burnt meteor
hm..
fossil spoke
Your connected computers have local addresses which the Router manages
burnt meteor
could u explain?
mhm...
so when we type whats my ip the router's ip is displayed or my ip?
fossil spoke
Yes and then what happens is that the Server is listening on the Port 7777 (by default) to any incoming traffic which the Router will send to if its not blocked by an firewall or the Router hasnt got that port forwarded
burnt meteor
so its the router's right?
fossil spoke
Whats the routers?
fossil spoke
Yes, your Static IP is assigned to your Router by the ISP
burnt meteor
thanks ๐ for ur time
twin juniper
how should i spawn a spectator pawn and possessing a player into it on death?
i have tried with OnRep_Health, but it didnt work
twin juniper
bitter oriole
So, anyone has experience with multiplayer on non-characters ?
bitter oriole
Working on vehicle pawns right now - it works, but just using bReplicatesMovement is obviously not enough, prediction / rollback is required too
Curious to know if anyone else has implemented that
inner iris
@bitter oriole the Ben Tristem Udemy multiplayer course covers creating and replicating a vehicle in the final section. Might be useful!
Also speaking of that course- itโs still in production and has a really solid steam listen server multiplayer integration section- could be a good opportunity to see if theyโd be willing to add a section for dedicated servers with steam too as they have all the framework in place already. Definitely an area that is essential for many games but has little to no documentation on how to set up. Otherwise it looks like the course will just finish up after this vehicle section
bitter oriole
Okay
twin juniper
Do I have to make possessing pawns execute on server?
twin juniper
anyone?
fossil spoke
Yes you should possess pawns on the server side
twin juniper
So run in server with a variable in it (player controller for what player to possess)
writing anyone is helping, so... Anyone?
thin stratus
@twin juniper that depends when and where you call it
For initial possess, you would use OnPostLogin in the GameMode
That is server side and gives you the controller of the player that joined
For respawning people usually perform a serverrpc inside of the playercontroller and then call a Respawn function in the game mode while passing the controller with it
If setup smoothly, initial spawn and Respawn can use the same function in the game mode
twin juniper
I use on death spawn spectator pawn and possess into it and destroy a character of dead player, but it doesn't delete it
Ok will try when I'm home
blissful thorn
Anyone familiar with DTLS via OpenSSL? I have built a working client-server implementation into my game but I have a question if the method im using for session tracking is best practice.
twin juniper
@thin stratus will this work? In onrep_health if health is 0 or less get game mode and calling a custom event with player controller reference and from there do everything?
thin stratus
As that should already be on the server
Well vars only replicate if set by server
So to make an onrep happen you need to ve on the server
So you can directly handle the <= check there etc
twin juniper
But custom event with run on server from onrep_health will run on server. Or not
twin juniper
Oh the on any damage is on server
thin stratus
It needs to be :D
That's what the server icon is for
Anyway, need to go. At UNI atm
inner iris
@bitter oriole no problem! ๐
burnt meteor
@twin juniper i have a solution if u want
bitter oriole
@inner iris Funny seing you on the coding side of things, btw, thought you were much more of an art person
inner iris
@bitter oriole Doing my best to get to a decent level on the coding side too, have always wanted to make a game! Art is no fun if you canโt do interesting things with it ๐
bitter oriole
Gonna make a game out of these landscapes ? ๐
inner iris
A lot more than landscapes if all goes well ๐
twin juniper
how do i get a player that got damaged from on any damage?
inner iris
@twin juniper when on any damaged is called, the actor that is calling it is the one that has been damaged.
twin juniper
and how to get the pawn hit?
with getplayer controller - get controlled pawn in it?
inner iris
I assume you are calling the damage event on the pawn, no?
twin juniper
on character
inner iris
Character is a pawn
twin juniper
Is this right?
inner iris
Yeah that should be fine- what isn't working for you?
twin juniper
my spectator pawn is spawning at 0,0,0
inner iris
That's an issue with your spawn logic, not the damage logic
inner iris
Is this being called on the character?
inner iris
I'm not sure why you are getting the controlled pawn when you already have it as self
inner iris
Typically possessing and unpossessing logic happens somewhere other than the pawn such as in the GameMode as you are dealing with destroying and possessing pawns
Also I'm not sure if you are using the standard spectator pawn or a custom one- I'd test first by spawning to a specific location and seeing if it works, then you can rule out a spawn collision issue.
Also have a read of this: https://wiki.unrealengine.com/Blueprint_Multiplayer_Respawn
inner iris
twin juniper
@inner iris now it works if client kills server, but if server does that the server dies
maybe something in giving damage is wrong
wait no nothing wrong with damage giving
I checked with destroyactor instead of respawn and it works ok
ok i got it all working
But the client cant controll spectator pawn
tame adder
would someone please be able to help me on an issue im having with my server hostings for some reason when i leave the game(Destroy session) it doesnt actually like i leave the game but i then cant find any other servers or cant even re-join the same game again unless i use the console and connnect through the lan ip address (open 127.0.0.2) please help ill show my screen
hasty adder
@raw novaeey#1200 sounds like you should investigate your error handling in uhh
I forget the name ofnit it has all your host and join logic
Make sure on error you are not destroying the session for the server
I think there's a tutorial a lot of ppl follow and a bool whew they plug both server and client into destroying session resulting in server closing its session if a client leaves
tame adder
but i think we want to destroy the one of the clients and thats our issue right now like the client can leave but then cant rejoin or search for the same server
hmm i need to find that ahaha
would you happen to know the link
hasty adder
Not off hand, mobile at the moment.
When client goes to a main menu you can always run a destroy session as a fail safe
tame adder
yea we try that but it seems it doesnt work correctly
tame adder
we are using online subsystem steam
and i test on the same pc but with 2 projects opened
hasty adder
Hmm. That shouldn't work if steam is actually on.
Should be two different computer different steam accounts etc
tame adder
okay i can do that
hasty adder
And I've seen you may need two different networks routing like that is sketchy. Like trying to dial your own telephone #
hasty adder
Tech steam should be doing its tunneling so with two computers it might work on same network i have messed with that in a year :0
tame adder
so the issue might be becasue steam isnt on
hasty adder
With steam off you'd be connecting through port 7777
twin juniper
So for some reason whenever a player connects to my dedi server I get this: https://i.imgur.com/s0fwGu8.png
It doesnt effect anything... but i worry it may in the future be a problem
edgy condor
what c++ socket library should I use for a linux server?
bitter oriole
So I've got the strangest of issues. I have two pawns in a network session. On the listen server, it looks like the local player has RemoteRole == ROLE_AutonomousProxy, instead of ROLE_SimulatedProxy
It's made even stranger (ahah) by the fact that on the client, that pawn correctly has Role = ROLE_SimulatedProxy, RemoteRole = ROLE_Authority
What gives ?
twin juniper
anyone here using point and click with acceleration? like for rts/moba games
the problem i see that sometimes(only sometimes) move to location (called from server side) has an ugly glitch, where the movement does not start smoothly
like the first couple of frames of the movement are cut out
bitter oriole
Hey @chrome bay , you're all over Google with multiplayer physics. Trying to do a cooperative physics thing, like a MP ball game - got any hints ?
@fierce birch looks involved in this too ๐
chrome bay
it should be relatively easy to write a custom ball physics component! Avoid PhysX like the plague is my only advice
I've tried... god knows how many times, to get PhysX replication with replay/prediction working nicely but it's just a minefield.
bitter oriole
So you can't have real physics in MP ?
I mean if the "ball" is a crate and falls on a surface, I still want it to slide along the surface, bump, etc
chrome bay
Unfortunately not so much - since PhysX is so crazy un-derterministic, the simulations differ too much on each player to have a smooth simulation
So you end up with constant corrections from the server
and replay is... difficult
I believe this is why Rocket League uses Bullet, they wanted more control over the simulation etc.
bitter oriole
Okay
So from your point of view, the best options are either to have authoritative clients, or custom physics ?
If I don't care about cheating etc
chrome bay
Yeh almost definitely. Just to clarify, are the players the balls or are the balls not player-controlled?
bitter oriole
Player-controlled, and they're not really balls, let's say vehicles
chrome bay
Yeah gotcha
For the early phase I would go for client-authoritive, but if you decide against that later then custom physics is the best way
chrome bay
Takes a little longer unfortunately but is worth it. I did it for these two projects (yet to do anything with collision for the hover vehicles) https://www.youtube.com/watch?v=UPb70PUf7KE&t=131s https://www.youtube.com/watch?v=rpWxsHX4B2k&t=50s
The pawns in the top-down game are just hovering spheres, so they were relatively easy.
bitter oriole
Yeah, unfortunately collisions are something i'd like to work well, so I guess i'm going to go with authoritative
chrome bay
Yeah I think so. Luckily for us Epic gave us source so Character Movement is there in all it's glory to strip the essential parts out of
I've done a few fancier things for my collision with those pawns but other than that, the main bulk of it is epic's handywork
in a way
bitter oriole
Would an authoritative client work by just sending location & speed to the other ? Or am I still going to need prediction ?
chrome bay
no prediction needed for the authoritative client
Although you probably still want to implement some smoothing of some kind
for players looking at other clients I mean
bitter oriole
Yeah, I mean, if I have two clients and a listen server, the client A is still going to need to simulate client B I guess
chrome bay
Yeah what I tend to do is send input as well, so remote players keep simulating with the same input until they hear otherwise.. that can help a lot sometimes, especially when data rate is quite low
A lil extrapolation if you will
In Character Movement the server doesn't actually simulate the client at all until they get a new packet, and they work out the delta time for the simulation from the last time they recieved a packet. It's a bit odd IMO, I don't like it much but I guess there's a reason they went with that method.
chrome bay
No worries!
Still waiting for Epic to make the character movement class more abstract so we can use it for more things... but that's probably not going to be a priority for them
Maybe when UT gets vehicles.. who knows
Though UT's been dead since july so no idea what's going on there
bitter oriole
UT has always been a side project for Epic, I mean that was pretty official
chrome bay
Yeah it looks like they're all on Fortnite for the time being, since BR is doing so well
bitter oriole
Do I need the movement component class, by the way ? I mean does it do anything in particular that I need ?
chrome bay
It can be quite handy, some stuff in code specifically looks for 'Movement Components' and calls some of the functions from all over
Radial Force Component for example looks for 'AddLinearForce' etc.
specifically on a 'UMovementComponent'
Inheriting from UPawnMovementComponent can be useful since some AI classes interface with it too
bitter oriole
Does that come with interfaces I need to implement ?
I mean the base PawnMovementComponent is pretty light
But in inherits the NavMovementComponent which isn't
chrome bay
Lemme check a sec, just opening up VS
Yeah sorry UNavMovementComponent is the one AI looks for
I think PawnMovement just has a couple of minor useful things, I can't remember if it's strictly 'required' for pawns
Although you could Shift + Alt + F it and see if any major classes come up :p
bitter oriole
Yeah I still have a hard time seeing how to interface with the movement component class. The entire API seems geared toward moving with speed
I don't see how I can implement physics with it
I mean if I have inputs that do "accelerate left", how do I tie that into "RequestDirectMove" ?
There is also a "RequestPathMove" but which is used ?
Well, gonna read some docs ๐
twin juniper
are there any circumstances where character event "begin play" is not being called after player connects to server
by this i mean client side character event "begin play"
i saw this on rare occasions, for example when a player runs my client for the first time
perhaps someone could give a better insight what could be happening
because i cannot reproduce the problem
chrome bay
Sorry my bad - those 'RequestMove' functions are actually really badly named.. they just input the full velocity required to get to the next path / target point - which you can usually just normalize and use for input which I think is what CMC does
@twin juniper I believe clients call BeginPlay at a different time to server - maybe they don't if the game hasn't been started yet