#multiplayer | Unreal Source | Page 327

wary willow Jun 17, 2017, 10:48 AM

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So, Overlap Event Occurs, then you RunOnServer some other event?

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I use Authority after Overlaps to prevent duplication

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Otherwise it would run not only on server actor, but client ones as well

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I just need it to run once

modern dome Jun 17, 2017, 10:49 AM

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you can do the same with RPC

sterile pebble Jun 17, 2017, 10:50 AM

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Let us clarify - SwitchHasAuthority helps us to understand in which world we are currently (client world or server world); RunOnServer is totally different stuff -> because you can call this event when you are server and when you are client and client will run RPC to server

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they purpose are different

wary willow Jun 17, 2017, 10:52 AM

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Also, I use SwitchHasAuthority to prevent "cheating" right before some functions that are not directly connected to the RPC

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Just a safety checks mostly

thin stratus Jun 17, 2017, 10:52 AM

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Okay, usecase for SwitchHasAuthority

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#1 You want to Spawn Replicated weapons in the Character. You do that on BeginPlay. Only the Server should call it -> SwitchHasAuthority to filter the Clients
#2 Overlap/Hit event, The Server should do the damage logic, the client should play the effects -> you split the logic with SwitchHasAuthority

wary willow Jun 17, 2017, 10:53 AM

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@thin stratus btw..why aren't you nvm..you stealth

thin stratus Jun 17, 2017, 10:53 AM

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Yop

wary willow Jun 17, 2017, 10:53 AM

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I was like wtf

thin stratus Jun 17, 2017, 10:53 AM

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Magic

wary willow Jun 17, 2017, 10:53 AM

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poof

thin stratus Jun 17, 2017, 10:54 AM

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#3 You call a Multicast, that calls on Server and Client, to spawn some Sound/FX. The Server is a dedicated Server and you don't want to play it on the server -> Switch has Authority to limit it to the clients

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(or "IsDedicatedServer" with branch)

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I will update the compendium with examples then. Sorry (:

wary willow Jun 17, 2017, 10:55 AM

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lol

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@thin stratus Oh, another good one for the comp would be how/why you should simulate fx or other non-gameplay essential stuff on clients vice just doing a multicast.

thin stratus Jun 17, 2017, 10:59 AM

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Yeah, I thought about such things. Problem is to find a good and non complex example (at least for some of them)

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The main points I could tell is just that it uses up time (ping) and resources (network traffic)

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But to be honest, most of the time, if oyu program something in multiplayer, you probably write all the server logic and then come to the point where the clients should perform an effect or so, so you just replicated it

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If you then run later into a situation where you are like "damn, this eats performance, bandwith etc"

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you will see yourself refactoring it

wary willow Jun 17, 2017, 11:00 AM

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then you optimize

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yeah

thin stratus Jun 17, 2017, 11:01 AM

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Nearly no one will write a system he never wrote directly fully working and optimized

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That might be more useful to put into a general "network optimization" tutorial

modern dome Jun 17, 2017, 11:04 AM

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I see. Thank you for the answer, exi.
I guess all my Server and Multicast are unnecessary then xD

wary willow Jun 17, 2017, 11:08 AM

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hmmm

thin stratus Jun 17, 2017, 11:08 AM

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In general you can always diff between Server and Client like that.
You have to remember that in most cases, the Actor exists on Server and Clients and Events, (like overlap) will call on Server and Clients.
BeginPlay and Tick, EndPlay, and what not.
Only things where you probably don't need it is if you spawn a non replicated actor runtime, or a replicated actor runtime from a client (which makes no sense but /shrug).
Or if you place an actor in the scene preruntime and set it to NOT load on clients

wary willow Jun 17, 2017, 11:08 AM

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You haven't run into any strange things in 4.16 @thin stratus ?

thin stratus Jun 17, 2017, 11:08 AM

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Not yet using 4.16

wary willow Jun 17, 2017, 11:08 AM

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oh

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It's like my project keeps breaking on its own

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Random stuff that was working an hour ago, doesn't work now, lol.

thin stratus Jun 17, 2017, 11:09 AM

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e.g.?

wary willow Jun 17, 2017, 11:09 AM

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well I am using the FPS template, and Apply Damage in Projectile

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Once the player dies, the player who killed him gets one point, simple enough

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Then it stopped working, instigator became null

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I had to add Get Instigator Controller to Event Instigator in Projectile to get it working again

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Before that, a simple function I had working in 4.14, didn't work in 4.16

thin stratus Jun 17, 2017, 11:12 AM

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can you show me the difference you added?

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I have a bit of headache atm, so lack concentration

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Then I can see if something changed in the source

wary willow Jun 17, 2017, 11:13 AM

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https://gyazo.com/f06e21ec5c6682e6989d9d527d540c0e

Gyazo

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All I did was add that apply damage, without that Get Instigator Controller

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it was working for hours, until it stopped. lol

thin stratus Jun 17, 2017, 11:14 AM

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So now you need that node?

wary willow Jun 17, 2017, 11:14 AM

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It was the only way for it to get the instigator

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So I am assuming yes

thin stratus Jun 17, 2017, 11:16 AM

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can I see where you spawn the projectile and also where you apply damage?

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And what exactly stopped working? The Apply Damage node at all

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Or the result in the actor you are applying it to

wary willow Jun 17, 2017, 11:16 AM

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nope, Instigator went null

thin stratus Jun 17, 2017, 11:16 AM

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So "GetInstigator" even though you provide one when Spawning the projectile, is null?

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Sorry if I have a hard time following :D

wary willow Jun 17, 2017, 11:32 AM

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Right, it's in the character BP

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Ah, nvm

thin stratus Jun 17, 2017, 11:33 AM

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Hm?

wary willow Jun 17, 2017, 11:34 AM

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Well, the Character BP was calling an RPC to the Server to Spawn the Projectile, I was using Self for the instigator reference.

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Get Instigator inside the projectile BP works

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Once it's spawned

stone lintel Jun 17, 2017, 11:37 AM

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@thin stratus any chance compendium update for AOnlineBeacon ?

thin stratus Jun 17, 2017, 11:41 AM

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@stone lintel At the moment not .I haven't worked with the beacons yet

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Need to learn more about them from Moss first

elder ravine Jun 17, 2017, 11:43 AM

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does anyone here know how i can replicate my Mage Attack Animation? it is now replicated on the server, so the client wont see any animations atm
Making a MOBA style game here

stone lintel Jun 17, 2017, 12:11 PM

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@elder ravine Play the animation as montage is a starting place, and u can use Multicast or OnRep()

elder ravine Jun 17, 2017, 12:11 PM

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will multicast make sure everyone sees the anim?

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Can i show you my game on Skype screenshare?

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i really cant get over this, and need this to work in order to be able to progress

stone lintel Jun 17, 2017, 12:14 PM

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Multicast will be called on server and all clients automatically perform the action if they are network relevant

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so yeah it will play on each client

elder ravine Jun 17, 2017, 12:14 PM

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I'm at a point now where the Server sees all the animations, but the client can only see his own animation, and not the server;s

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and i've used multicast

sterile pebble Jun 17, 2017, 12:15 PM

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can you share screenshots of you blueprint?

stone lintel Jun 17, 2017, 12:15 PM

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that means you're only perform the action in client not through RPC or such

sterile pebble Jun 17, 2017, 12:15 PM

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you should call multicast from server side (even in the blueprints)

elder ravine Jun 17, 2017, 12:15 PM

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mhh ok

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give me a sec ill try

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when i try to multicast the blueprints, the second player's camera moves to the edge of the map everytime

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then when i untick Reliable it works again

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i'll make some screenshots

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of my blueprints

sterile pebble Jun 17, 2017, 12:19 PM

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In my game I made several things for animation replication: run server RPC from client to play animation montage -> server will run multicast event -> in multicast event I'm actually playing specified animation

elder ravine Jun 17, 2017, 12:23 PM

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📎 Blueprint2.png

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📎 Blueprint3.png

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📎 Blueprint4.png

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📎 Blueprint5.png

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📎 Blueprint1.png

brittle sinew Jun 17, 2017, 12:24 PM

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@elder ravine are you trying to call this multicast on the PlayerController

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Oh, there are ss

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Yeah, the issue with calling a multicast on your PlayerController is that the PC doesn't exist on all clients—it only exists on the server and the owning client. That's why your camera moves to the (0,0,0) spot...when you try to call a multicast on an object that doesn't exist on all clients UE freaks out

elder ravine Jun 17, 2017, 12:25 PM

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So The player himself is actually an invisible box, which follows a Player spawned by the server. So the player actually send commands to the server, which then send commands to the Playercharacter controlling him

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Im working from the MPTopdownNetworkController

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With this i send commands to the AI which is the players character in game

brittle sinew Jun 17, 2017, 12:26 PM

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Where is your actual multicast function?

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Currently you're only playing the animation on the server

elder ravine Jun 17, 2017, 12:27 PM

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ye i've set it back to run on server

sterile pebble Jun 17, 2017, 12:27 PM

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you should another custom event after Server_CastSpell -> Multicast_CastSpell with Multicast property check

elder ravine Jun 17, 2017, 12:27 PM

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The final screenshot, is the custom event which should me Multicast

brittle sinew Jun 17, 2017, 12:27 PM

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Okay, but do you understand why it doesn't work given what I said above?

sterile pebble Jun 17, 2017, 12:28 PM

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So, Server_CastSpell should call new event Multicast_CastSpell which will do what the current Server_CastSpell is doing

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and then everything should work

brittle sinew Jun 17, 2017, 12:28 PM

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Not if he's still trying to do it on the PlayerController, no

elder ravine Jun 17, 2017, 12:28 PM

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ah i see what you said lethalclips

sterile pebble Jun 17, 2017, 12:28 PM

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where did you found player controller?

elder ravine Jun 17, 2017, 12:28 PM

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But then how do i fix that?

brittle sinew Jun 17, 2017, 12:29 PM

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You need to call the function on some object that exists on all clients

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The pawn is one of those, and you could put it on there

sterile pebble Jun 17, 2017, 12:29 PM

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ohh this is blueprint of player controller

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lol

elder ravine Jun 17, 2017, 12:29 PM

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ye

sterile pebble Jun 17, 2017, 12:29 PM

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LethalClips is totaly right )

elder ravine Jun 17, 2017, 12:29 PM

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ok let me read it and try to understand what you said Lethalclips,

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im still a beginner so give me a sec

brittle sinew Jun 17, 2017, 12:30 PM

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Yeah, you're fine 😃

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The thing with Multicast is that it doesn't just broadcast a method to all clients magically...it broadcasts the message onto the object that it's called on on all clients

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If the object doesn't exist on all clients, a Multicast won't work on that object (well, I guess it "works" as in it doesn't break, but it doesn't run as expected)

elder ravine Jun 17, 2017, 12:32 PM

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So you are saying if i put that last piece of code, ''server cast fireballspell'' on the actual BaseCharacter of the PlayerCharacter, and then multicast it, that it then works?

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Do i understand that correctly?

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So move that code from MPTopwdownPlayerController over to BaseCharacter or PlayerCharacter?

brittle sinew Jun 17, 2017, 12:33 PM

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Yes, as long as you call the multicast from the server, it will work

elder ravine Jun 17, 2017, 12:33 PM

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ahh okay

brittle sinew Jun 17, 2017, 12:33 PM

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I would say that's a good place for it, sure

elder ravine Jun 17, 2017, 12:33 PM

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okay then i will try that

elder ravine Jun 17, 2017, 12:48 PM

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i've tried a lot right now, but with whatever i tried, i wasnt even able to shoot anymore at all

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this is a bit too advanced for me

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But thanks a lot for the help, i will keep trying it in different ways

hasty adder Jun 17, 2017, 2:11 PM

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It comes down to a client doesn't call a multicSt

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Multicast

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Unless its authority (is the server)

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The node should say "if server" or something on it

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This is why you call run on server to then run the multicast.

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Back in my hole I go!

elder ravine Jun 17, 2017, 2:34 PM

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can someone skype with me, so i can share it over screenshare?

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and then we can quickly fix it?

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I'll give the person a present if they succesfully help me?

modern dome Jun 17, 2017, 3:09 PM

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I'm quite confused right now

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Don't events get executed both of Client AND Server?

thin stratus Jun 17, 2017, 3:26 PM

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Events get executed where you call them

jolly siren Jun 17, 2017, 3:26 PM

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yeah there is no magic

modern dome Jun 17, 2017, 3:29 PM

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@thin stratus I'm even more confused. Didn't you say Switch has Authority is used to determine different behaviour of Server/Client?
When a client calls an event, it will only execute on the client.
If the Server calls an event, it will only execute on the server.
According to your statement now

thin stratus Jun 17, 2017, 3:30 PM

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That is correct

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Despite RPCs

jolly siren Jun 17, 2017, 3:30 PM

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the switch lets you control whether or not to call an event on the server or client.

thin stratus Jun 17, 2017, 3:30 PM

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Events of the Actor class, like Tick or BeginPlay are also nothing magically replicated

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It's just that each instance on each PC (server/client) will call them

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If the actor is replicated or not

modern dome Jun 17, 2017, 3:32 PM

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But doesn't it make the Switch has Authority node useless for custom events then?

thin stratus Jun 17, 2017, 3:32 PM

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Yaaa and no

modern dome Jun 17, 2017, 3:33 PM

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Because a Custom Event can only called from Server OR client, not both

thin stratus Jun 17, 2017, 3:33 PM

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You can make sure that events aren't called from client side

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If the Function, code-wise, exists in the Actor

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then a client and server can call it, hack wise

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You might want to use the Switch to limit it to Server

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But yeah, in general, for event where you are sure that only server or client will call it

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the switch is meaningless

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but you might also have events that you, by hand, call from server or client

sterile pebble Jun 17, 2017, 3:34 PM

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Custom event could run on server and client in case when you will call it in Tick function, for example

thin stratus Jun 17, 2017, 3:34 PM

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e.g. A Client/ListenServer can both fire a weapon

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"FireWeapon" is a CustomEvent of yours

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It makes it different if Server or client pressed their left mouse button to shoot

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as the server can directly process what ever shooting does

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The client needs to call an RPC though

modern dome Jun 17, 2017, 3:36 PM

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Now it makes sense. Thank you

reef berry Jun 17, 2017, 7:04 PM

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Hey guys, so if I get this right, GameState is loaded in the memory for every client, right? So if my game mode doesn't tell who are the good guys and who are the bad, I wouldn't want to put that in the GameState since people could read the memory and then see who's bad, correct? I feel that's where it should be (as it's part of the state of the game) but could be used to cheat

sterile pebble Jun 17, 2017, 7:15 PM

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I suppose than you should save this only on server-side (like game mode 😃 )

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I'm really not sure if you shoudl be on such level of paranoia

reef berry Jun 17, 2017, 7:19 PM

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there is a game whos biggest downfall is this exact scenario, just want to make sure it can't happen to mine too 😛

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Is it ok to have it in game-mode though? Is there a way to create a seperate object that is only on the server?

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well, I guess any class you only instantiate in gamemode would be, nevermind

modern dome Jun 17, 2017, 7:25 PM

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don't you just have to set the Team assignet to not replicate?

modern dome Jun 17, 2017, 7:50 PM

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@reef berry What exactly are you trying to do tho?

regal junco Jun 17, 2017, 9:41 PM

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Yeah stuff like teams should be on the server, that's atleast a good approach.

reef berry Jun 18, 2017, 12:14 AM

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@modern dome basically like TTT on Garry's Mod if you've ever played it

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When you spawn into the game, you're either an innocent or traitor, you get assigned anonymously, traitors know who the other traitors are, innocents don't know who's a traitor who's not

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so server assigns teams, but i dont want you to be able to read memory and just see who gets put on the traitor team

fossil spoke Jun 18, 2017, 12:17 AM

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@reef berry If you get the Server to assign the clients version of an Non-Replicated variable that tells that client what they are then there should be no issues.

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RPC to the client saying, "hey your an traitor, set your local non replicated variable to traitor so you know who you are"

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The server should also manage a list of who is an traitor or not so that you can manage any events that may need to be determined by that

reef berry Jun 18, 2017, 12:19 AM

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I thought everything was always replicated on gamestate

fossil spoke Jun 18, 2017, 12:19 AM

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Only variables that are marked replicated...

reef berry Jun 18, 2017, 12:20 AM

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ah, I thought it was automatic for gamestate, I guess I just miss-understood when it says it's replicated on client and server, so I assume that's just the object, not its properties then.

fossil spoke Jun 18, 2017, 12:20 AM

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Non replicated variables you could consider as local state to that machine

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No the difference is where its replicated to

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If an replicated variable is changed on the gamestate, EVERYONE gets that change.

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If an replicated variable on an PlayerController is cahnged, only the owner of that PC gets the update.

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Of course this is under the assumption that the server is setting these variables

reef berry Jun 18, 2017, 12:22 AM

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well player controllers aren't even replicated to the other users at all, correct?

fossil spoke Jun 18, 2017, 12:22 AM

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Yes

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Thats why i stated above

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Only the owner gets the change

reef berry Jun 18, 2017, 12:22 AM

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hmm, ok

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thanks

fossil spoke Jun 18, 2017, 12:22 AM

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Because only the owner and the server know about that clients PCs

modern dome Jun 18, 2017, 7:30 AM

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@reef berry
The GameState (not GameStateBase) has functions when the Match starts. You can easily do the Team assignments there.
For game based messages (like XYZ's body got inspected by a detective)
you should also use GameState , because the messages are replicated to others.

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The replication who is your traitor partner should be handled in the GameState, simply search for Traitors and send them the other traitor's information.

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I use the GameMode to provide functions that are more like "rules" like the time for a single round or to check if someone wins.
The Gamestate handles the actual game (reducing time, doing hit detection)

native moth Jun 18, 2017, 12:31 PM

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Man.. I am breaking my back trying to get a proper weapon spread system up and running that has smooth client scaling. The issue I am having is that calculating the weapon spread(that is based on pawn movement per frame like CoD/Counter-strike) on the server, makes the crosshair on local machines very laggy. I was wondering if you guys just to help me draw out the basic concept on how to go about getting this working properly

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So at the moment I am doing the following with a fully automatic weapon:
On button pressed:
- start timer on server that calls "FireBullet" with looping enabled
- start timer on local client to calculate shooting spread for local crosshair, not used in any important calculations

On button released, invalidate timer on server and local client

FireBullet(server): calculates current spread based on how long you have been shooting and fires out linetraces
CalculateSpread(client): calculates current spread on how long you have been shooting, locally

slim holly Jun 18, 2017, 12:36 PM

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well, common value between client and server is velocity

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it should be pretty accurate on both ends, so use that to scale your spread

native moth Jun 18, 2017, 12:37 PM

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Got that part working just fine. I am however very confused on how to go about doing this stuff for the shooting spread. Do I create two exec paths(one for server, one for client) with all the needed events

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or is there a better or smarter way

slim holly Jun 18, 2017, 12:40 PM

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well you probably need to fork the execution where client does visuals, and server does the bullet thing + visual if it's listen server

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weapons are surprisingly complex in this matter, you gotta do SFX in client end and actual work on server end

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mind you, there is a time delay between those events

native moth Jun 18, 2017, 12:44 PM

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yeah

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next thing is charging up the spread is no problmem, but when not shooting it will have to cooldown. Everyone has told me I shouldnt use tick, especially not on multiplayer stuff

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so I guess when I finish shooting, it will start a new timer on both server and client that cools down the spread

slim holly Jun 18, 2017, 12:48 PM

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I'd say it's probably ok to use tick on server end, since weapon firing is pretty important event in a shooter game

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and should always be handled

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as for re-fire delay or cooldown, just let both client and server do the check

native moth Jun 18, 2017, 12:55 PM

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Did it with a timer, works pretty good now on the server.. Now to try and do it all on my client 😛

hasty adder Jun 18, 2017, 1:00 PM

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Is there a visual track to the bullets spread like tracers?

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As in its firing a orojectile and not just a line trace spread?

slim holly Jun 18, 2017, 2:30 PM

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for tracer visuals on hitscan weapon you would need preset recoil patterns

robust wind Jun 18, 2017, 2:41 PM

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Hey i followed the ue4 blueprint multiplayer series from epic and now when I launch the game in standalone I can't find any sessions any ideas why ?

raven viper Jun 18, 2017, 4:41 PM

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Anyone here who has experience with Dedicated server builds can help a little bit? There are only 2 warnings in the log, yet the dedicated server starts up and then exits immediately.

jolly siren Jun 18, 2017, 5:09 PM

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and the warnings are?

raven viper Jun 18, 2017, 5:14 PM

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[2017.06.18-16.07.29:660][ 0]LogUObjectArray: CloseDisregardForGC: 0/0 objects in disregard for GC pool
[2017.06.18-16.07.29:660][ 0]LogModuleManager:Warning: ModuleManager: Module 'XAudio2' not found - its StaticallyLinkedModuleInitializers function is null.
[2017.06.18-16.07.29:714][ 0]LogModuleManager:Warning: ModuleManager: Module 'VaRestPlugin' not found - its StaticallyLinkedModuleInitializers function is null.
[2017.06.18-16.07.33:815][ 0]LogExit: Preparing to exit.

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VaRest is removed and disabled completely

robust wind Jun 18, 2017, 5:25 PM

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Open the .uproject with notepad

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Maybe there is still a reference to it

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@raven viper

raven viper Jun 18, 2017, 5:25 PM

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Checked, nothing in it reffing. That was the first I checked :/

robust wind Jun 18, 2017, 5:25 PM

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Oh ok

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Delete the save and intermediate folder

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Also if it's c++ The build and .vs folder

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And rebuild the visual studio field

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*files

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And if there is another plugin delete the intermediate (and build folder) there too

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Then rebuild the vs files

raven viper Jun 18, 2017, 5:27 PM

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Will do, thanks for the tip ^^

raven viper Jun 18, 2017, 6:23 PM

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Did, still same problem. I'll repackage again, and we will see

trail dragon Jun 18, 2017, 9:23 PM

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Is the host always the owner of all pawns? I know the client owns the PlayerController (which exists on both client and host) but it's a little fuzzy when you spawn a new pawn - you have to specify the owner, which is presumably the player controller

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And if you do that on the server, then the server version of the player controller is the owner, but the client owns the player controller?

native moth Jun 18, 2017, 9:29 PM

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if you specify a clients playercontroller, then that playercontroller is now the owner on all instances

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if I understand your question correctly

trail dragon Jun 18, 2017, 9:31 PM

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@native moth I'm just confused as to who actually owns pawns (and how you make sure the right person owns a pawn when respawing their pawn)

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Though I think Posessing a pawn actually changes the owner and Posession can only be done on the server, so maybe I don't have to worry about it?

native moth Jun 18, 2017, 9:31 PM

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I dont think possesing changes ownership

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the way I handle respawn and possesing is like this:
Pawn dies, calls a RPC(run on owning client) inside the playercontroller called "PawnDied"(run on owning client), that playercontroller then adds a new call to the gamemode "RequestRespawn"(run on server) and passes on a reference to it self(playercontroller). Then the gamemode handles the spawning of a new pawn actor, passes the playercontroller reference to the owner slot and the calls the "posses" function

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hope that makes sense

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I am pretty new to networking in UE4, so there might be a smarter way to do this, but atleast this works for me at the moment 😃

trail dragon Jun 18, 2017, 9:38 PM

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Looking at @thin stratus 's Networking Compendium, it has this page: http://i.imgur.com/6nE3Oqx.png My confusiong comes from: If the client owns the playercontroller, and the playercontroller owns the pawn, why can only the server set variables on the pawn to be replicated?

Imgur

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I understand why from a authoritative connection, I'm just not understanding how that relationship ends up working out in this particular case.

native moth Jun 18, 2017, 9:39 PM

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Because clients cant communicate to other clients versions of the same pawn

thin stratus Jun 18, 2017, 9:39 PM

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Ownership and Authority are 2 different things

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Ownership is for RPCs. Authority is for the actual replication

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Like, in simple words, only the Server can replicate vars

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Doesn't matter who owns what

native moth Jun 18, 2017, 9:40 PM

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Ownership is important when you want certain functions to run ONLY on that instance of the actor

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or when you need to reference non replicated stuff(like casting to a widget etc.)

trail dragon Jun 18, 2017, 9:41 PM

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@thin stratus (hi from Twitter btw) - so the server owns the pawn, but the client is the authority? Or other way around

native moth Jun 18, 2017, 9:41 PM

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otherway

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your client and server can own the pawn. Authority is used to determine wether the function/event is run on a server or a client

trail dragon Jun 18, 2017, 9:42 PM

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Ah, okay. This makes more sense now.

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So the client is the Owner, but the Server has Authority, so Client can make RPC calls to the server, who sets the values, and then b/c Server is Authority those get replicated to all clients

native moth Jun 18, 2017, 9:43 PM

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yes

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basically 😛

trail dragon Jun 18, 2017, 9:44 PM

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How does implementing client side prediction work with events? I have a flag in my game, you overlap it, you win. Obviously in multiplayer the server needs to be the one who triggers the actual end game when the server detects the overlap, but can I detect the overlap on the client and call the other functions (sound effect, particle, etc.) anyways and just not execute the gamemode->win part?

native moth Jun 18, 2017, 9:45 PM

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Yeah sure

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So lets say you want all players to see a particle system when a player touches the flag. I would do it like this:

OnBeginOverlap -> Call Event PlayerTouchedFlag
PlayerTouchedFlag(Run on server) -> Call Event SpawnParticles
SpawnParticles(Multicast) -> spawn particles at location

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so the reason why you need to do the round trip to the server(PlayerTouchedFlag) is because a client CANNOT fire events on other clients, only the server can do that

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using the Multicast runs the event on ALL clients(and server!) regardless of ownership

trail dragon Jun 18, 2017, 9:47 PM

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Won't that cause a round trip delay before you see your particles though

native moth Jun 18, 2017, 9:48 PM

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yeah, but thats the way it goes if you want those particles to spawn on all clients

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to signal a win

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if you just run "OnBeginOverlap-> spawn particles on location" the particles will ONLY happen on your client(unless you're the server)

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Rountripping to the server is always neccesarry if you want to sync the clients on events

trail dragon Jun 18, 2017, 9:49 PM

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Hmmn. I was going to say "have the client ignore the multicast" (that way you could call particles OnBeginOverlap and then call the Multicast but ignore the Multicast when it plays locally)...but there's no way to know when to ignore the Multicast since you're not the authority or the owner of the flag pole

native moth Jun 18, 2017, 9:50 PM

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also remember, if your RPC event is important for the game(like signalling a win), you can tick the "Reliable" checkbox and it will get priority in the network stream

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Depending on how network heavy your game is, I dont think there will be a very noticeable delay(if the player has like 50ms, then it will take 100ms for it to fire on their own client)

trail dragon Jun 18, 2017, 9:52 PM

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Sure, just trying to think ahead. Easy enough test scenario to talk about 😃

native moth Jun 18, 2017, 9:53 PM

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if its important for you to have instant feedback on the client, what you can do is cast an event from the flagpole to the pawn that overlapped, run an event (call on owning client) that spawns the particles.. That is all done locally

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so instantly

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and then after fire the RPC to the gamemode

trail dragon Jun 18, 2017, 9:54 PM

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That sounds hacky though hah

native moth Jun 18, 2017, 9:54 PM

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well, I am working on a third person shooter

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and I have some weapon spread/accuracy that depends on how long you've been firing etc. Using replicated values for this makes the feedback on the client very sluggish

trail dragon Jun 18, 2017, 9:55 PM

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Shouldn't in that case the client set the values (which don't get replicated anywhere) and then the server just overwrites those values when the logic comes through? They should run the same logic and stay mostly in sync, no?

native moth Jun 18, 2017, 9:55 PM

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so what I do instead is that I do two calculations. One on the owning client which causes it to be smooth, but only for visuals, and then one on the server that is using for linetracing(important stuff only happens on the server)

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yeah, but if you have stuff that runs on timers/tick, you will need to do the calculations on two instances

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So the local calculations are just for show and is smooth, but they are NEVER used for anything important

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while the server runs it own that is used for important stuff

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and I just never replicate the result of the servers calcuation down the client(no reason too, its only for visuals)

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its really only important for the server to know the correct result

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Anyways, gotta hit the bed!

trail dragon Jun 18, 2017, 9:59 PM

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The next hiccup is that it's VR and you have to use the controllers and trigger to grab the flagpole (via an interface) so now I have to figure out how to send that heh, though I think the Compendium covers that

trail dragon Jun 19, 2017, 7:34 AM

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So... on that note... Can you not implement a C++ UFUNCTION(Server, Reliable, WithValidation) call that takes an interface as argument? As soon as I add the argument to my function, it doesn't compile and complains about missing functions.

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(I assume interfaces can't go through RPCs because it needs the network id of the remote object to call functions on and that can only be retrieved through uobject/aactor)

thorn merlin Jun 19, 2017, 9:52 AM

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i upgraded to 4.16 and my dedicated server crashes on load, does anyone else have problem with this?

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also, if anyone who has successfully built and launched servers on 4.16 would share their target.cs and build.cs i'd be grateful as i havnt updated mine in years and i think that might be my issue (Beyond the interface changes, i think there are things im doing i need to update

rough iron Jun 19, 2017, 10:00 AM

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@trail dragon only UObjects can go throught an RPC/Replication becasue they need a netindex

regal junco Jun 19, 2017, 11:17 AM

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this is a stupid question, but to use the steam online sub system, does your game then have to be on steam?

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like, do you need your own AppId?

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@thorn merlin did you package the maps in project settings?

thorn merlin Jun 19, 2017, 11:19 AM

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@regal junco I've been building this since like 4.6, so something has changed, but yea maybe the maps are different, im reverifying, the shooter sample has build targets and all that so im double checking everything atm

regal junco Jun 19, 2017, 11:20 AM

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yeah when I upgraded the sessions didn't work for me, as the standalone could not find any maps. A new change is that you have to define which maps should be packaged

thorn merlin Jun 19, 2017, 11:24 AM

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i think you are right, but it looks to be a regression error - https://github.com/EpicGames/UnrealEngine/commit/b891dcd4e208b911a4887bcda2b48f35a845b05b

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thanks for the help @regal junco

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also I hope you don't mind but I mentioned our conversation here to this person having issues - https://answers.unrealengine.com/questions/604823/416-dedicated-server-game-runs-in-editor-window-bu.html#answer-669173

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ok - i figured out my issue, in updating my build targets etc i missed this

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[SupportedPlatforms(UnrealPlatformClass.Server)]

rough iron Jun 19, 2017, 11:37 AM

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@regal junco yes your game needs to be on steam, for testing purpose you can reuse an existing id (the steam works sample comes with one) or the id used in ShooterGamer. If you reuse an app id from any other game you might get issues xD

regal junco Jun 19, 2017, 11:38 AM

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yeah alright, thanks @rough iron, so like if I'm not sure I wanna release on Steam first, I won't bother haha

rough iron Jun 19, 2017, 11:43 AM

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you should atleast ensure that the integration works xD

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so you wont get in trouble with your deadlines if you release on steam

regal junco Jun 19, 2017, 12:06 PM

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yeah true

native moth Jun 19, 2017, 3:42 PM

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@thin stratus you ever had any trouble with actor references not being in sync on clients/servers? I have made changes to my item system so the client finds nearby actors passes them on to the hud, when the hud item is clicked, that actor reference is then passed back to the server, adds the item to inventory and then sets the actor to be destroyed. The actor is removed perfectly on the client/server, but never on both at the same time

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so my guess is that the actor ref is not the same, and therefore(even with multicast) the actor is not destroyed on all instances

thin stratus Jun 19, 2017, 4:11 PM

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Hm no, usually if the actor is set to replicate, it should be enough to call destroy on the server

hasty adder Jun 19, 2017, 5:21 PM

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📎 image.png

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@thorn merlin

dapper galleon Jun 19, 2017, 6:06 PM

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How would guys manage a local scene for a multiplayer game? Like if there was a racing game with a repair station, when a client enters the station, the cars starts repairing (repair is server authority) and the entering client sees a scene with the vehicle being repaired and some mechanics-guys meshes that only the client can see. The scene would happen client-side and the repair (values and timers) would be server-side. Where in the map would that scene happen?

wary willow Jun 19, 2017, 6:20 PM

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@dapper galleon have a location for the map specific to the scene outside playing area

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Then switch cameras to that scene for that specific client only

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I had to do something similar for my MP VR game

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Then after scene is done. Switch cameras back to wherever.

dapper galleon Jun 19, 2017, 6:30 PM

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@wary willow Thanks for sharing your solution. Was just wondering if there was a better way of doing this, without having to set it outside of playing area, but I guess it's fine.

wary willow Jun 19, 2017, 6:34 PM

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@dapper galleon I mean, it would be the most performant

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You can cull/deactivate it when not in use

native moth Jun 19, 2017, 7:51 PM

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@thin stratus haha... what a rookie mistake. My actor wasnt set to replicate ^_^

thin stratus Jun 19, 2017, 7:53 PM

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LOL

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Happened to me too

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:P

austere veldt Jun 19, 2017, 8:15 PM

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Is there a way to dinamically adjust NetUpdateFrequency based on the distance from the synced actor or any other condition? Sorry if that's a newbie question, but I couldn't find the answer anywhere on the forums.

native moth Jun 19, 2017, 8:18 PM

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I see now, you cant replicate variables of the type map

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thats interesting

thin stratus Jun 19, 2017, 8:19 PM

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Might be, but also wouldn't know why not

native moth Jun 19, 2017, 8:19 PM

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all replication fields get grayed out

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ohh well, a struct will have to do for now 😛

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@thin stratus you were talking about not replicating inventory variables, how was that? I guess just the server needs to know what the pawn has in their inventory

thin stratus Jun 19, 2017, 8:23 PM

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The Server has all the information in an array of struct

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But the client doesn't need everything

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Only the data that you need to display the item in the inventory should be replicated

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Like Name, Icon, StackSize

native moth Jun 19, 2017, 8:25 PM

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well, thats like my total inventory 😛 Ammo type and ammo ammount

wary willow Jun 19, 2017, 8:49 PM

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@native moth I haven't messed with maps yet in BP. Is it fully implemented?

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Other than replication

wintry flower Jun 20, 2017, 4:13 AM

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@thin stratus your network compendium is amazing. Thx a lot 😍 lol. You must get thanks all the time 😅

trail dragon Jun 20, 2017, 6:02 AM

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I have a Reliable Multicast function being called on the server which doesn't execute on clients, any idea what gives? I see it being called on the server since a print statement within it gets printed with "Server: <my print statement>" but no corresponding Client messag.e

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The MultiCast function.

📎 UE4Editor_2017-06-19_23-03-14.png

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The calling function. This is expected to only be called on the server (thus the lack of replication, the client never calls OnLevelCompleted.)

📎 UE4Editor_2017-06-19_23-03-49.png

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OnLevelCompleted calls the Multicast function. I see the effects and messages happening on the server, but no effects on the client.

native moth Jun 20, 2017, 6:30 AM

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@wary willow map variables seems to work fine as long as you dont try to replicate them 😛

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Also had issues with passing them through RPCs without it causing a crash. So I guess the current situation is to stay away from them to transfer information over the network

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@trail dragon inside which blueprint class is that event called?

trail dragon Jun 20, 2017, 6:35 AM

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@native moth both functions exist on the same blueprint (which is created in the world)

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Though it just occured to me that I dont' have this blueprint set to Replicate

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I need Replicate to be true for RPC calls to work don't I? ._.

native moth Jun 20, 2017, 6:44 AM

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yep, or else the clients wont register it

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I had the same issue yesterday trying to delete and actor that wasnt replicated

trail dragon Jun 20, 2017, 6:47 AM

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Yup that fixed it.

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Now to figure out why my scoreboard accidentally registers the first player in multiplayer as having completed the game immediately heh

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Step 1) Make sure the relevant variable sin my PlayerState are actually marked for replication ;_;

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Step 2) Remove the BeginPlay code that was used for testing earlier hah

native moth Jun 20, 2017, 7:36 AM

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Havent got around to work with PlayerStates yet

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they seem pretty nifty

trail dragon Jun 20, 2017, 8:18 AM

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What is the best way to implement this? I have a scoreboard that has lists of players (let's say two teams), and when players cross the finish line they change teams. The UI is attached to the Finish Line blueprint. My initial idea was when you crossed the finish line, the server would update the Player's PlayerStates and then multicast to all clients "Hey you should update", and then the clients would examine the replicated PlayerStates and rebuild the scoreboard. Issue: It appears the multicast update often goes through before the PlayerState is replicated, so it does rebuild the scoreboard but with out of date information. Is there a better design pattern to do this?

thin stratus Jun 20, 2017, 8:29 AM

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You have 2 ways: Either you put the changes into a RepNotify Variable and update the Widgets in the OnRep function

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Or you pass the data through the Multicast

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@trail dragon

past bear Jun 20, 2017, 8:48 AM

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it's been a while since I've done any networking, so I could do with a hand knowing what I'm doing wrong here:
I have a client side interaction event that calls a 'reliable run on server' event, which in turn alters the value of a repnotify variable

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OnRepNotify calls a non-replicated function - shouldn't that non-replicated function be working on all clients?

thin stratus Jun 20, 2017, 8:49 AM

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It depends on the Actor you are calling it in

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In Blueprints, RepNotify will call on all instances of the Actor (if replicated of course). That also includes the Server

past bear Jun 20, 2017, 8:49 AM

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it's a regular actor placed in the level

thin stratus Jun 20, 2017, 8:49 AM

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Ah, you are calling the ServerRPC directly in it?

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Then you probably forgot about Ownership

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Actors placed in level are owned by the Server

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Clients can't perfom a ServerRPC on them

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You would need to already move onto the ServerSide inside of the Character/Controller or whatever is owned by the Client and processes your interaction

past bear Jun 20, 2017, 8:52 AM

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ah, that's outside of my control, the event is coming from native code

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perhaps the interaction event is already supposed to be replicated

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time to have a look at the source

thin stratus Jun 20, 2017, 8:53 AM

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Other way is "rerouting" the event

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Means if you call the Event in your placed Actor, you can then check if the Client calls it (SwitchHasAuthority) and then call a ServerRPC inside of the Clients PlayerController.

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That one would get a Parameter of the placed actors type

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So you can pass the Actor with it

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And in the ServerRPC you then call the original event on the passed reference

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that's a dirty workaround though, but maybe you need to

native moth Jun 20, 2017, 8:55 AM

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quick question. Enabling steam subsystems is just the adding the engine stuff to DefaultEngine.ini right? Or is the whole "copy over DLLs from steamworks sdk" still relevant?

past bear Jun 20, 2017, 8:55 AM

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thanks for that - annoyingly the person to ask about all this stuff isn't here today -_-

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not sure if the interaction event is replicated since it's wrapped up in a macro somewhere

thin stratus Jun 20, 2017, 8:57 AM

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@native moth Depending on th eEngine version, the thing is now a Plugin

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So you would also need to make sure to activate that

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But I don't have all the steps in my head. I activate steam every few months and then don't touch it anymore

native moth Jun 20, 2017, 8:57 AM

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arhh, missed the whole plugin thingy

thin stratus Jun 20, 2017, 8:58 AM

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@past bear Hm, then you gotta wait I guess. If you run into other issues, feel free to ask (:

past bear Jun 20, 2017, 8:58 AM

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well, I can't really just sit here and do nothing all day (or longer whilst they're off sick)

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just gotta work out how this interaction component is supposed to work, I guess, heh

thin stratus Jun 20, 2017, 8:59 AM

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Well, you can print the Function that the interaction component calls

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If it only calls on the client, then you can be sure that it's not replicated

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I assume it works with some kind of interface?

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Maybe that gives a hint about possible Server calls

past bear Jun 20, 2017, 9:00 AM

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logging may well be the way forwards

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I'm currently digging through existing blueprints to see if something else uses this

thin stratus Jun 20, 2017, 9:02 AM

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Sounds like the programmer isn't commenting enough :D

past bear Jun 20, 2017, 9:10 AM

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hmm, okay, so the interaction event is happening on the server, so I don't think I need to call a 'reliable run on server' event.

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OnRep for the repnotify however is also only happening on the server

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I assume this is the ownership problem, perhaps?

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pahaha, got it

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need to tick a box to say the actor replicates

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cheers @thin stratus xD

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it's the simple things you forget when you haven't touched networked stuff in yonks

thin stratus Jun 20, 2017, 9:21 AM

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Ah, actor not replicated. Classic. :P

past bear Jun 20, 2017, 9:22 AM

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yup!

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it's the 'have you tried turning it off and on again' of UE4 networking

native moth Jun 20, 2017, 3:33 PM

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@thin stratus is it possible to test out steam session creation/joining with 2 instances on the same machine? For some reason I cant find any sessions running 2 stand-alone instances on my own machine

thin stratus Jun 20, 2017, 3:34 PM

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Steam shouldn't allow you to open an application twice

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The second one should say that it can't activate the subsystem or so due to it already being up

native moth Jun 20, 2017, 3:34 PM

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hmm, didnt see that error anywhere

wary willow Jun 20, 2017, 3:35 PM

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You need two PCs to test OSSteam

thin stratus Jun 20, 2017, 3:35 PM

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Or at least a virtual machine inside of your os

wary willow Jun 20, 2017, 3:35 PM

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Aye

native moth Jun 20, 2017, 3:35 PM

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arhh okay

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cool, will package and sent it to a friend then :p

wary willow Jun 20, 2017, 3:36 PM

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Or post it in #ue-testing

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Or wait. No such channel.

native moth Jun 20, 2017, 3:36 PM

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No worries, will exploit friends for own benefit

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😄

native moth Jun 20, 2017, 4:01 PM

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quick question @thin stratus (sorry for disturbing you) - doing a packaged builds warns me that the Steam API is disabled:
LogOnline:Display: STEAM: Loading Steam SDK 1.39
LogOnline:Warning: STEAM: Steam API disabled!
LogOnline:Display: STEAM: OnlineSubsystemSteam::Shutdown()

So I went online, downloaded steamworks 1.40, made a new folder called Steamv140 and followed this guide:
https://wiki.unrealengine.com/Steam,_Using_the_Steam_SDK_During_Development#Engine.2FBinaries.2FThirdParty.2FSteamworks to copy all the DLLs needed. Do i delete the old Steamv139 folder? Packaging at the moment still throws the same error

Steam, Using the Steam SDK During Development

wary willow Jun 20, 2017, 4:04 PM

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@native moth you don't have to ping him everytime

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And that warning is common

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If you are having issues not being able to play your game on Steam. Try 480 to test that everything works in standalone mode.

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You should be able to bring up Spacewar stuff up and see Steam popup bottom right corner

native moth Jun 20, 2017, 4:12 PM

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Yeah that is what I am doin at the moment(the 480 ID). My session stuff doesnt work, so I assumed that the API disable was the culprint

wary willow Jun 20, 2017, 4:18 PM

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@native moth or you did something wrong somewhere else ;)

native moth Jun 20, 2017, 4:20 PM

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Yep, that is what I am trying to figure out now

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Aha got it! Works now - that is pretty cool!

wary willow Jun 20, 2017, 4:25 PM

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@native moth ggwp

native moth Jun 20, 2017, 4:25 PM

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I am really amazed how easy sessions are in UE4

wary willow Jun 20, 2017, 4:26 PM

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Session creation is not the issue for Multiplayer

trail dragon Jun 20, 2017, 4:26 PM

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@thin stratus hmmn... I think I'll set up a event dispatcher on the GameState and a RepNotify, and when the RepNotify is called it invokes the dispatcher so that my GameState isn't directly tied to the finish line, though technically I'm changing two variables at once (if finished and finish time), hopefully they don't get updated in two different network messages 👀

sweet spire Jun 20, 2017, 7:54 PM

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Do servers haave cameras for controlled pawns? like can u line scan on server side from camera to center screen

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is that a thing

modern dome Jun 20, 2017, 8:02 PM

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@sweet spire The Player Controller has a camera, but not the server itself. You may need to get the Local Player Controller of the Server to do this

sweet spire Jun 20, 2017, 8:04 PM

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is line tracing from the camera of the player controller at server

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is that camera linked to the pawn

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or?

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never knew player controllers had cameras

vital steeple Jun 20, 2017, 10:26 PM

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how do you guys handle spawning weapons for a mp game. like im trying to spawn a weapon from a class reference in a struct but its just not running. IIRC spawning actors is soemthing only the server can do, so i made in an RPC, but it still doesnt work. 😦

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@sweet spire i think you can trace from any two points, as long as the pawn has the camera (or any other point of reference) regardless of who controls the pawn.

sweet spire Jun 20, 2017, 10:37 PM

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alright thank you very much ^^

vital steeple Jun 20, 2017, 10:43 PM

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yup, PM me if you have any issue with it 😃

frank portal Jun 20, 2017, 11:48 PM

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do you guys allow the clients to change the aim offset? Because of latency it wont be good to do it on the server (like multiplayer shootout does) or?

limpid aurora Jun 21, 2017, 4:17 AM

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multiplayer server packaging, have issue with it

native moth Jun 21, 2017, 9:40 AM

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@vital steeple the class reference struct, is that variable replicated or passed through the RPC? If no the, the server will use a "None" class and spawn nothing

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(and remember, the blueprint from which you spawn actors should also be replicated)

limpid aurora Jun 21, 2017, 10:49 AM

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if a server is hosted and i try to join it from editor (not standalone) the editor crashes saying WorldSettings is NULL

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stand alone client works fine

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problem is with the editor only

hasty adder Jun 21, 2017, 11:22 AM

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check your project settings defaults and map world defaults

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should have a gamemode pawn etc etc

limpid aurora Jun 21, 2017, 1:25 PM

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from persistent level it does not get world settings, if connection is done from editor

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if (PersistentLevel)
{
WorldSettings = PersistentLevel->GetWorldSettings(bChecked);

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@hasty adder will check

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I have game mode, pawn player controller all in place

stone lintel Jun 21, 2017, 2:11 PM

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hai guys, anyone knows the difference between IOnlineSessionPtr::EndSession() and IOnlineSessionPtr::DestroySession() ?

jolly siren Jun 21, 2017, 2:13 PM

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one ends the session and the other destroys it lol

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you can start a session back up that has been ended

stone lintel Jun 21, 2017, 2:15 PM

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is there any exact reason why should we keep the session if it's been ended

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for example in default AGameSession there's a virtual method HandleMatchHasEnded and call EndSession for each client,, but since it's not destroyed the client can't create or join another session

jolly siren Jun 21, 2017, 2:19 PM

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if you still want the session lol there are use cases for ending a session and then starting the same one again

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you can't create or join a new session while you are still connected to an existing one even if it has ended

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so destroy it if that is what you want to do

stone lintel Jun 21, 2017, 2:20 PM

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okey i see,, i guess in my case, i just have to call destroy,, thanks man

jolly siren Jun 21, 2017, 2:20 PM

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right, sure np

stone lintel Jun 21, 2017, 2:21 PM

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btw, i'll assume the ended session is not published through OSS, am i right?

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so if client searching the session they won't find the ended session

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just in case if i want to keep the session and not destroy it

limpid aurora Jun 21, 2017, 2:41 PM

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@hasty adder it helped thanks the default settings

hasty adder Jun 21, 2017, 2:41 PM

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\o/

wintry flower Jun 21, 2017, 4:52 PM

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so for RPCS, in the docs it says they should be used mainly for "unreliable gameplay events that are transient or cosmetic in nature." so i feel like i"m using them too much. Let's say I want to spawn a bunch of actors over time. Should I use RPCs for that, or use replicated variables containing an array of the actors being spawned or something

twin juniper Jun 21, 2017, 4:53 PM

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I'm going to just lay this right here

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Does anyone know how I could setup UnrealFrontEnd r to do more than just one build
For example
Inside of OnlineSessionAsyncServerSteam.cpp there is a macro called "STEAMGAMEDESC" which is literally the name of your server as it shows in steam master server
However, what if i want to build 100 servers
Server1, Server2, Server3
Would I have to modify the engine code of UnrealFrontend to do this?(edited)
There has got to be a way to set up the server name outside of that file
it seems incredibly inefficient

brittle sinew Jun 21, 2017, 4:54 PM

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@wintry flower if you're spawning replicated actors, there's no need for an RPC

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Just spawn them on the server and they'll propagate down to the clients

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I'm surprised what you quoted was said about RPCs in general though, not just unreliable ones

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(and yes I see it haha, just kinda surprised as they're definitely necessary for gameplay mechanics often)

wintry flower Jun 21, 2017, 4:56 PM

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well for a simple example, let's say I want a player to be able to spawn a cube when they press a button. that requires an RPC to the server

brittle sinew Jun 21, 2017, 4:56 PM

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Yeah, sure

wintry flower Jun 21, 2017, 4:57 PM

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but that doesn't seem like it's an "unreliable gameplay event"

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lol

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i guess you're right to be surprised about what the docs say because I am too

brittle sinew Jun 21, 2017, 4:57 PM

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I agree, like I said I'm not really in full agreement with that

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Unreliable RPCs definitely do have their place for cosmetics and things like that, but to say that's RPCs' primary purpose seems a little incorrect

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I think it might be more since unreliable is the default state of an RPC

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And reliablility is an option rather than a given

wintry flower Jun 21, 2017, 5:00 PM

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yeah true

brittle sinew Jun 21, 2017, 5:01 PM

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@twin juniper I see the server name gets set using that, why not just override the method that sets it and use your own name?

twin juniper Jun 21, 2017, 5:02 PM

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@brittle sinew Well I would still need to be able to edit it either during runtime, or during package time.

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If that makes sense?

brittle sinew Jun 21, 2017, 5:02 PM

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Correct, but you wouldn't need to override the macro if you just set it again with your own value after that...?

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Or even if you don't override that specific method, set the name anywhere else you have the server pointer

wintry flower Jun 21, 2017, 5:05 PM

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i'm actually still a little confused about RPCs. If the function to spawn the cube is in the player controller and is something like this

UFUNCTION(Server, Unreliable, WithValidation)
void SpawnCube();

Since the client owns the player controller, it is allowed to make that RPC to the server. So if the cube is set to replicate, it will show on all clients?

twin juniper Jun 21, 2017, 5:06 PM

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@brittle sinew Well that still wouldn't help me with packaging so that i can have different server names

brittle sinew Jun 21, 2017, 5:06 PM

#

Yes, when you spawn a replicated actor it puts itself on all clients where relevant

twin juniper Jun 21, 2017, 5:06 PM

#

@wintry flower If it is replicated, it will be shown to all players

brittle sinew Jun 21, 2017, 5:06 PM

#

Though currently you have an unreliable method, which doesn't guarantee its execution

wintry flower Jun 21, 2017, 5:06 PM

#

i started with a thing where you can hover over a cube (placed in level at start) and the material will change, and for that, it's the same way. the function to set the material on the cube is RPC to server from player controller, which then calls a multicast function on the cube to actually set the material for all clients. would it be better to use a replicated variable for the material?

brittle sinew Jun 21, 2017, 5:07 PM

#

You could, and use RepNotify-s to update it on the clients when received

wintry flower Jun 21, 2017, 5:08 PM

#

hmm

brittle sinew Jun 21, 2017, 5:08 PM

#

@twin juniper why tie it in at packaging? Why not just load it from a config file or something? Seems a lot more versatile

twin juniper Jun 21, 2017, 5:08 PM

#

@brittle sinew Oh, I guess that could work.

wintry flower Jun 21, 2017, 5:09 PM

#

ok thx @brittle sinew i will play around with it more. currently at work but really wish I wasn't because I want to keep learning this stuff lol

twin juniper Jun 21, 2017, 5:11 PM

#

@brittle sinew Have you worked with the HLOD system

brittle sinew Jun 21, 2017, 5:14 PM

#

No, sorry

twin juniper Jun 21, 2017, 5:15 PM

#

ok

pliant cypress Jun 21, 2017, 5:40 PM

#

Hello guys, here is a stupid question.
If my project working perfectly in editor, if I build it, should it work exactly the same way?
I thought this should be the point of UE4, but I do not find it so, and Im not sure if Im missing something or not.

brittle sinew Jun 21, 2017, 5:57 PM

#

Where did you gather that's the "point of UE4"? :p

#

There are differences between editor and packaged builds, and they can sometimes have major effects on functionality, yes

main sentinel Jun 21, 2017, 6:56 PM

#

Hey guys, I'm working on a dedicated server game while using Steam subsystem. Yesterday I figured that I needed to make two separate GameModes. One for the server and the other will be the default client GM. Is that right?

#

Also, if I do that... Can I do the server and client in the same project?

timid pendant Jun 21, 2017, 6:58 PM

#

Wouldnt it be Game Instance for the client?

main sentinel Jun 21, 2017, 6:59 PM

#

Yea, I mean. I won't be doing anything on GameMode. It's just to set the default classes like: gameInstance, PlayerController, Playerstate, GameState and etc

hasty adder Jun 21, 2017, 7:10 PM

#

Confused.

#

Gameinstance and gate things by is server or is dedicated server righ?

twin juniper Jun 21, 2017, 7:23 PM

#

@pliant cypress The editor and the packager are not the same

#

its very stupid

#

but its just how it is

#

what u see in editor is not what u get in a packaged build

pliant cypress Jun 21, 2017, 7:24 PM

#

But it should be right? I mean that supposed to be the point.

twin juniper Jun 21, 2017, 7:24 PM

#

Not the point of the engine

#

its just how it works

pliant cypress Jun 21, 2017, 7:26 PM

#

That really sucks when you build a game and it runs in the editor but not a built version

twin juniper Jun 21, 2017, 7:26 PM

#

read logs

#

Saved/Logs

pliant cypress Jun 21, 2017, 7:26 PM

#

What is the point then to build a game in UE4 if it wont ever run on any PC?

twin juniper Jun 21, 2017, 7:27 PM

#

it will run

#

u just need to read logs

#

it makes u have to work for it

#

its a bitch but its worth it once u figure it out u get this feels good feeling

pliant cypress Jun 21, 2017, 7:28 PM

#

I love to fix bugs do not get me wrong. But this is way over my head

#

I do not even know what to look for

twin juniper Jun 21, 2017, 7:28 PM

#

then you dont really know xD

#

Go to your saved folder

#

and open up your logs

#

I had this problem when I originally started with unreal

#

but the real problem i had was just ifguring out the framework (where logs are saved, where each error is saved, where profiling info is saved...etc)

pliant cypress Jun 21, 2017, 7:31 PM

#

I might be wrong - probably I am - but if the game works in editor, there should be no errors in log?

brittle sinew Jun 21, 2017, 7:32 PM

#

Well there's a reason it's not working in a packaged version, no? :p

#

You won't necessarily get a log out of something not working, and even though there are differences between editor and packaged versions, those differences aren't magic

twin juniper Jun 21, 2017, 7:33 PM

#

The problem is that unreal doesnt make logs OBVIOUS

#

you have to find it lol

brittle sinew Jun 21, 2017, 7:33 PM

#

For example, there are things like WITH_EDITOR in C++ that exist specifically for creating differences between packaged and editor versions of the game

twin juniper Jun 21, 2017, 7:33 PM

#

like, for someone coming from a unity background... when u built a project it would pop up with errors

#

in unreal

#

it doesnt pop up lol

#

u have to go to Window => Output Log

#

to get errors

#

i think thats the problem a lot of people have

#

is finding where to find the errors

nova wasp Jun 21, 2017, 7:35 PM

#

Isn't there a setting to have said error output window appear on top when an error occurs?

pliant cypress Jun 21, 2017, 7:35 PM

#

In the log I have 0 errors

twin juniper Jun 21, 2017, 7:35 PM

#

That's not possible.

#

If your project isn't packaging

#

It will say

#

"ERROR"

#

and make an annoying sound

#

lolol

pliant cypress Jun 21, 2017, 7:36 PM

#

Its packaging

#

no problem there

brittle sinew Jun 21, 2017, 7:36 PM

#

@twin juniper it certainly is possible, lol

pliant cypress Jun 21, 2017, 7:36 PM

#

It just wont work the same way as it works in editor

twin juniper Jun 21, 2017, 7:36 PM

#

Oh

#

It's packaging but not opening?

pliant cypress Jun 21, 2017, 7:36 PM

#

Its opening

brittle sinew Jun 21, 2017, 7:36 PM

#

🤦

severe widget Jun 21, 2017, 7:36 PM

#

You should check where the package project is staged, there's a similar logs folder there

twin juniper Jun 21, 2017, 7:36 PM

#

Then

#

whats the problem?

pliant cypress Jun 21, 2017, 7:37 PM

#

but there is a problem where players cannot click on/play cards (it is a card game)

severe widget Jun 21, 2017, 7:38 PM

#

This something new in your project?

pliant cypress Jun 21, 2017, 7:38 PM

#

not really

severe widget Jun 21, 2017, 7:38 PM

#

Ok, because I seem to remember you around for a while working on a card game

twin juniper Jun 21, 2017, 7:38 PM

#

Lol.

pliant cypress Jun 21, 2017, 7:39 PM

#

yeah its been 6 years now :)

severe widget Jun 21, 2017, 7:40 PM

#

How are you doing your card interaction?

pliant cypress Jun 21, 2017, 7:40 PM

#

not sure what you mean

#

https://drive.google.com/open?id=0B9_JsUMIhFfcMHc3VHlacXNreGs

Google Docs

20170621.7z

#

this is the project

#

if you wanna have a look

severe widget Jun 21, 2017, 7:41 PM

#

Wow, that's unusually open

pliant cypress Jun 21, 2017, 7:41 PM

#

I do not have to much time left to finish

#

so I do not mind if others have a look

severe widget Jun 21, 2017, 7:41 PM

#

I might take a look at it, didn't really plan on looking through a full project

brittle sinew Jun 21, 2017, 7:42 PM

#

If it's an interaction system I would just go down the list and see where things break

pliant cypress Jun 21, 2017, 7:42 PM

#

its all right, I really appreciate if you take a look at it

brittle sinew Jun 21, 2017, 7:42 PM

#

Things like do the inputs themselves work? If so, does the communication to the other actor work? If so, etc.

severe widget Jun 21, 2017, 7:42 PM

#

Anyway, try combing the project settings to see if something is getting cooked out or otherwise excluded in the package

#

And if you're going to do what lethal suggests, copy things to a new project and tear it down there (be prepared to draw/print a lot of text)

brittle sinew Jun 21, 2017, 7:44 PM

#

Yeah, I just suggest that because narrowing down things like this in absence of errors can be difficult

pliant cypress Jun 21, 2017, 7:44 PM

#

"try combing the project settings" what do you mean by that?

brittle sinew Jun 21, 2017, 7:44 PM

#

The one major one I've seen get a few people is arrow components don't exist in packaged builds

#

Other than that, I don't know of any specific differences other than things marked WITH_EDITOR

twin juniper Jun 21, 2017, 7:48 PM

#

@brittle sinew WITH_SERVER is also another one

#

i use it

#

Actually, its #if WITH_SERVER_CODE

pliant cypress Jun 21, 2017, 7:50 PM

#

I have no C++
I found on the log that Steam Subsystem is not enabled, but in editr it is, could it be?

#

an issue?

twin juniper Jun 21, 2017, 7:50 PM

#

It says that

#

all the time

#

for me

#

yet its not an issue

pliant cypress Jun 21, 2017, 7:50 PM

#

k

trail dragon Jun 21, 2017, 8:47 PM

#

I have a variable that was working fine, and then I set it to RepNotify (instead of just Replicated)

#

And now it doesn't seem to call the RepNotify function on the client - the text I ask it to print out prints out but says "SERVER:" and doesn't actually seem to run on the Client. http://i.imgur.com/oZSoHrh.png

Imgur

#

These variables are in a class derived from PlayerState too btw

#

And the thing that sets the variable is the GameMode so it has to be on the server.

trail dragon Jun 21, 2017, 9:25 PM

#

Jun 16 2017, Backlogged issue: Date and Time variable does not appear to replicate across clients. Oops

trail dragon Jun 21, 2017, 9:48 PM

#

How do I know when a newly connecting client is actually ready to use the PlayerArray in GameState? The OnPlayerArrayUpdated binding never fires on the client when they connect (presumably a third client would trigger it on the first client)

fossil spoke Jun 21, 2017, 10:08 PM

#

When BeginPlay is called for the clients PlayerState it is ready.

trail dragon Jun 21, 2017, 10:09 PM

#

@fossil spoke As it currently stands, when BeginPlay is called on my object in the world for the client, the PlayerState array is empty.

fossil spoke Jun 21, 2017, 10:09 PM

#

Also i believe there is an function or delegate that is called when an PlayerState has just been replicated to clients. You might want to check that out as well.

trail dragon Jun 21, 2017, 10:15 PM

#

@fossil spoke There does not appear to be af unction or delegate for PlayerState.

#

In the GameStateBase.h, they simply declare it as: /** Array of all PlayerStates, maintained on both server and clients (PlayerStates are always relevant) */ UPROPERTY(Transient, BlueprintReadOnly, Category=GameState) TArray<APlayerState*> PlayerArray;

#

So... I don't even know how that gets replicated in the first place tbh

fossil spoke Jun 21, 2017, 10:19 PM

#

Check the gamemode. Its been a while since ive messed around looking for that shit haha

trail dragon Jun 21, 2017, 10:20 PM

#

The GameMode only exists on the server, how is it going to know when a client has finished recieving the latest copy of the PlayerArray?

#

The GameMode does have OnPostLogin/OnLogout, but does that mean the GameState has been replicated?

fossil spoke Jun 21, 2017, 10:24 PM

#

Backtrack and follow the playerstate creation process. You may find what your looking for.

trail dragon Jun 21, 2017, 10:45 PM

#

Man, I can't get the GameState to run a Multicast event on the clients either.

#

http://i.imgur.com/i4a6ug6.png When called by the GameMode (in OnPostLogin) it only runs on the server.

Imgur

brittle sinew Jun 21, 2017, 10:48 PM

#

PostLogin occurs pretty early in the GM flow, IIRC before the pawn

#

It's really most likely just too early at that point

#

Even if the GameState exists on the server, it has to replicate down to the clients first

trail dragon Jun 21, 2017, 10:48 PM

#

PostLogin is the soonest point you can call a Multicast function on the PlayerController (from Documentation) and yes it is before the pawn.

#

That's really what I'm trying to get at @brittle sinew - how do I know when that replication has finished so my client can do a bunch of "join in-progress session" type logic

brittle sinew Jun 21, 2017, 10:49 PM

#

I can't seem to find one for the GameState, I know there is one for the PlayerState

#

Why not just call functions onto the PC at that point then, since you know it's safe to call functions on it?

trail dragon Jun 21, 2017, 10:50 PM

#

Do we know that the PlayerState array is replicated by then?

brittle sinew Jun 21, 2017, 10:50 PM

#

No, I believe the callback is for the specific PlayerState assigned to the local pawn

trail dragon Jun 21, 2017, 10:51 PM

#

Also, at least in Blueprint, there appears to be nothign on the PlayerState that lets you know when it's replicated.

brittle sinew Jun 21, 2017, 10:51 PM

#

I know OnRep_PlayerState exists, I don't know if it's exposed to BP though

#

If you don't have a C++ parent of your pawn, not much you can do about that :/

trail dragon Jun 21, 2017, 10:52 PM

#

Eh I can rearrange things if needed

#

Wading my way through the three or four hour long Blueprint tutorial, since they have a lobby and they show the settings of the players when they connect

#

The player controller sends a message to the server when their settings change and then the server multicasts it back down to everyone else, hah

trail dragon Jun 22, 2017, 2:28 AM

#

If I have "Use Seamless Travel" checked on the GameMode, do I have to do anything else? Right now the server moves to the next level and the client gets disconnected and ends back up at my entry map. In my GameMode I call Open Level with Absolute unchecked.

trail dragon Jun 22, 2017, 6:18 AM

#

...I have to use ExecuteConsoleCommand SeamlessTravel <map path> don't I? That should probably be in the documentation somewhere.

hasty adder Jun 22, 2017, 1:23 PM

#

Has anyone tried using a non movement replicated actor but using a tick to interpolate it's location to all to maintain a smoother to hide hiccups? Curious in blueprint how this might be done. I suppose the object on tick records it's location to a vector and in rep of its change do somthing to mc to clients to use its current position and interpolate to the new

regal junco Jun 22, 2017, 1:41 PM

#

Is there some way I can check if "open ipadresshere" fails?

twin juniper Jun 22, 2017, 2:06 PM

#

https://issues.unrealengine.com/issue/UE-44006

#

Man this was backlogged to 4.18 now 😭

#

Anyone have any fixes?

stoic maple Jun 22, 2017, 2:12 PM

#

Has anyone gotten replays to work in UE4? I have the UI and related elements created and working, but nothing is being replicated even though it is set as such. (Asking here since it should work the same way as multiplayer replication)

chrome bay Jun 22, 2017, 2:13 PM

#

Not used it before, but shootergame uses it.

#

So you can check epic's setup there

regal junco Jun 22, 2017, 2:26 PM

#

@twin juniper , this works for me bool AMPTestGameMode::EnoughPlayersToStartGame() { if (GetNumPlayers() + GetNumSpectators() < 2) { return false; } else if (GetNumPlayers() + GetNumSpectators() >= 2) { return true; } else { UE_LOG(LogTemp, Warning, TEXT("EnoughPlayersToStartGame: Should not be here")); return false; } }

hasty adder Jun 22, 2017, 2:27 PM

#

That bug sounds related to steam?

twin juniper Jun 22, 2017, 2:34 PM

#

@regal junco what does this do

#

where are u calling getnumplayers() from

#

what class?

regal junco Jun 22, 2017, 2:34 PM

#

GameMode

#

oh wait, is it because you are calling it from a client? @twin juniper

twin juniper Jun 22, 2017, 2:35 PM

#

Uhm

#

@regal junco Yeah from the steam master server

regal junco Jun 22, 2017, 2:35 PM

#

Wait what? haha, GetNumPlayers() is from gamemode which only exists on the server

twin juniper Jun 22, 2017, 2:36 PM

#

https://issues.unrealengine.com/issue/UE-44006

#

No its from another file

#

OnlineAsyncServerSteam

#

i need the users to see if a server is full or not

regal junco Jun 22, 2017, 2:37 PM

#

ahh, I missed the steam part, my bad

twin juniper Jun 22, 2017, 2:49 PM

#

any ideas?

regal junco Jun 22, 2017, 3:02 PM

#

Sadly I'm not using steam

rare cloud Jun 22, 2017, 3:07 PM

#

@twin juniper, Steam integration is pretty obselete, maybe use UWorks ?

#

https://forums.unrealengine.com/showthread.php?141019-UWorks-(Complete-Steamworks-C-BP-Integration-Plugin)

twin juniper Jun 22, 2017, 3:07 PM

#

yeah i looked at vlad's stuff

#

it looks really nice

#

but im not really interested in buying a $300 solution at this time.

#

Also, according to his gumroad page

rare cloud Jun 22, 2017, 3:08 PM

#

85$*

twin juniper Jun 22, 2017, 3:08 PM

#

its not for sale anymore

#

lol

#

https://gumroad.com/l/UWorks

Gumroad

UWorks (UE4 Steamworks Plugin)

UWorks is a plugin for Unreal Engine 4 which provides complete Steamworks integration for both C++ and BP. For more information follow the link below. -------------------------------------------------- Unreal Engine Thread. -------------------------------------------------- Your feedback will always be appreciated!

#

see

rare cloud Jun 22, 2017, 3:08 PM

#

oh

#

take time but you can create your own Online Subsystem ?

#

or wait 4.18

#

but yeah I guess Steam access it's really important

twin juniper Jun 22, 2017, 3:11 PM

#

i only really need

#

to validate current player count

#

the rest of the subsyststem is fine

rare cloud Jun 22, 2017, 3:12 PM

#

you build engine from source ?

twin juniper Jun 22, 2017, 3:15 PM

#

yea

rare cloud Jun 22, 2017, 3:16 PM

#

oh maybe you can fix this by yourself if the steam third party isn't the problem

#

if the steamworks lib need to be update it will be really more complex x)

twin juniper Jun 22, 2017, 3:16 PM

#

connecting to the server is fine

#

its just

#

its saying there are 0 players

#

when you call from the master server

rare cloud Jun 22, 2017, 3:17 PM

#

@twin juniper, int32 UFindSessionsCallbackProxy::GetCurrentPlayers(const FBlueprintSessionResult& Result) { return Result.OnlineResult.Session.SessionSettings.NumPublicConnections - Result.OnlineResult.Session.NumOpenPublicConnections; }

#

https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Private/FindSessionsCallbackProxy.cpp#L106

twin juniper Jun 22, 2017, 3:18 PM

#

yea

#

i know

#

its wrong

#

thats the issue

rare cloud Jun 22, 2017, 3:18 PM

#

ok can you run it as DebugMode ?

twin juniper Jun 22, 2017, 3:18 PM

#

it always returns 0

rare cloud Jun 22, 2017, 3:18 PM

#

and check values

twin juniper Jun 22, 2017, 3:21 PM

#

can't atm

#

would have to package a server

#

its a messy process lol

regal junco Jun 22, 2017, 3:31 PM

#

Wait is the default steam sub system depreciated?

twin juniper Jun 22, 2017, 3:34 PM

#

No

#

It's just bugged in some situations

#

Like GetCurrentPlayers() always returns 0

#

xD

#

also, the server name isn't very easy to set

#

it should be modified to read from a config file imo

#

instead of from a macro

regal junco Jun 22, 2017, 3:36 PM

#

Are you just using that test appid or is your game accepted for steam?

twin juniper Jun 22, 2017, 3:37 PM

#

im using test app id for now

#

steam direct is out now though

#

which is great

#

but u need a business bank account

#

which i setup last week

regal junco Jun 22, 2017, 3:40 PM

#

Oh you do? Where can I find more information about that?

rare cloud Jun 22, 2017, 3:40 PM

#

@twin juniper, https://allarsblog.com/2016/02/28/updatingsteamsdk/

Allar's Blog

Updating UE4's Steam SDK

May 24, 2017 Update: Epic's 4.16 version of UE4 has had its Steam SDK upgraded to v1.39. This is still one version short of the latest SDK (v1.40) at the time of this writing but its significantly more recent. They even added SteamController fixes. I'm not sure

#

you can maybe try to update the steam sdk to 1.40

#

if the source of the problem is the steam sdk itself

#

or it's an unreal issue

twin juniper Jun 22, 2017, 3:42 PM

#

im not sure

#

i mean would there be a way to check that

#

before doing sometihng drastic like that?

#

it sounds like they updated it

#

to steamworks 1.39 lol

#

which i doubt would be the root of my issue

rare cloud Jun 22, 2017, 3:45 PM

#

if there is a change log of 1.40

#

which say we fix this kind of bug

twin juniper Jun 22, 2017, 3:46 PM

#

i think its a unreal issue

#

i mean i doubt they would make a bug report

#

if it wasnt

hasty adder Jun 22, 2017, 3:48 PM

#

Workaround could be making an array in gamestate of current players and add post login and remove on logout?

twin juniper Jun 22, 2017, 3:50 PM

#

yeah

#

but i wouldnt be able to query this information

regal junco Jun 22, 2017, 4:16 PM

#

how about that you kick the player joining a full server? @twin juniper

#

also does the SteamAPI have a natpunch that we can use?

twin juniper Jun 22, 2017, 4:56 PM

#

@regal junco the problem is, the client cant actually get the number of players

#

so for example

#

i have a server list that says "ServerName, Ping, PlayerCount/MaxPlayerCount"

#

but PlayerCount always returns 0

#

max playercount is fine

regal junco Jun 22, 2017, 5:02 PM

#

but you can store it on the server, eg in gamemode, and then when clients connects, it checks if he should be kicked or not @twin juniper

twin juniper Jun 22, 2017, 5:03 PM

#

yea

#

i mean i could just setup a REST API

#

but

#

this stuff is supposed to all be built in

#

if get max players works

#

why wouldnt getcurrent

hasty adder Jun 22, 2017, 5:25 PM

#

@thin stratus https://www.gamedev.net/blogs/entry/2260592-how-i-synchronized-a-simple-rigidbody-across-network-players-with-ue4/ if you skimmed this. This sound feasible in blueprints to use for same. A ball that gets kicked around in mp?

GameDev.net

How I synchronized a simple rigidbody across network players with UE4

[color=rgb(128,0,0)]The Issue[/color]I'm developing an online soccer game for UE4 which you can get from http://github.com/Gamieon/UBattleSoccerPrototype for...

#

I have an issue where the ball has matrix like updates.. Skips rather then moves to new position in a rubber-band fashion (which i would prefer) local multiplayer or lan ping it would move like ----------- where as higher ping, hiccups represent like ------- ---------- ---

thin stratus Jun 22, 2017, 5:35 PM

#

Yeah it's missing the interpolation on the client side

#

but if we replicate the location with UE4s default thingy it should do that

#

We could also disable the movement replication and just give the client a rotation and location via replicating

#

And then interp between current and new one

#

that should stop the hickup

hasty adder Jun 22, 2017, 5:39 PM

#

Ok would you remove movment rep and say tick in the ball repnotifys a transform. Then to remote update the transform and have the client interopt between?

#

I saw a post on this but was unsure of the method it sorta died out

thin stratus Jun 22, 2017, 5:40 PM

#

I would try that at least

hasty adder Jun 22, 2017, 5:41 PM

#

Ok will do appreciate the input 😃

lament kettle Jun 22, 2017, 9:11 PM

#

Is getting networking to work properly, supposed to be difficult and frustrating and time consuming?

#

Im doing this tutorial series a second time now, (for the sake of understanding) https://www.youtube.com/watch?v=u-fnrC3OB5E&

and it feels like theres so much missing

YouTube

Unreal Engine

Blueprint Multiplayer: Lobby Player Controller | 12 | v4.11 Tutorial Series | Unreal Engine

In this video we begin working on our Player Controller setup for our Lobby Menu which handles the process of setting up the Lobby Menu display for the ownin...

▶ Play video

#

-no server browser tutorial provided by ue4 dev team...

#

-no steam functionality support via bp...

brittle sinew Jun 22, 2017, 9:20 PM

#

Networking seems to be one of the areas where BP is a little lacking, yes

#

You'll at least need to dabble in C++ a little bit if you want to build a dedicated server—a source version of the engine is required for it

#

There are plugins online that help with exposing some of the flow to BP, but I wouldn't expect to be able to get away with not using C++ at all when pushing a multiplayer game via Steam, it's just not feasible at this point

lament kettle Jun 22, 2017, 9:28 PM

#

Yes, I understand that. I've already created the project via C++ and am exposing functiosn to BP.

#

I want to keep this project BP oriented, while trying to make sure I don't use ticks or polling (polling in events in UMG client side only).

#

I do hope that sometime within the next two or three major versions, that BP will have more steam exposed functions.

#

Luckily there is "Advanced Sessions"

#

Until then though...

brittle sinew Jun 22, 2017, 9:37 PM

#

I wouldn't really hold your breath on that, haha

#

I don't really think it's the goal of the dev team to expose everything to BP, nor should it be really

lament kettle Jun 22, 2017, 9:38 PM

#

Why not though?

#

Also, I was having a small bug yesterday and fixed it.

#

The freaking yt video skipped over this...

brittle sinew Jun 22, 2017, 9:39 PM

#

Exposing things is a tradeoff, it's not free in terms of build time and editor performance

lament kettle Jun 22, 2017, 9:39 PM

#

http://imgur.com/UMpqE37

Imgur

#

I understand that, but having it being exposed would help half the people using UE4 BP's.

#

Everyone usually sells on Steam.

#

Just went back to the video.

#

I missed it.

brittle sinew Jun 22, 2017, 9:41 PM

#

There are probably a lot more people than you think that never touch selling and just use it for fun, and I don't think there's a ton wrong with that, but IMO most people seriously shipping games would be using C++ already

lament kettle Jun 22, 2017, 9:41 PM

#

Damn, I'm an idiot.

#

I was like wtf is happening.

#

Had to trace it back and figure out what was happening.

#

The thing is, you can easily convert the project to C++ once you have a prototype going.

#

I think you can get 50% to 80% of the project done via bp in about 3 months.

#

If you have the assets.

#

I'm talking about a multiplayer game btw.

#

I guess I'm still new to this whole "shipping games" thing, so I guess when I finish this game and publish it... I'll find out.

brittle sinew Jun 22, 2017, 9:44 PM

#

Yeah, I get your point, I just see it as in a setting where there isn't unlimited dev power, I don't really count things not being exposed to BP against the team

lament kettle Jun 22, 2017, 9:45 PM

#

Here's the bottom line though.

#

Does it do what you want it to?

#

Is there any performance impact?

#

If you like those two answers, a yes and a no, then you don't need to rewrite it in C++.

#

I would just convert anything too heavily used into C++.

#

And honestly, I have 6+ years in C++, so understanding object oriented code and using that via BP shouldn't be an issue.

#

At least for me...

deep orbit Jun 23, 2017, 1:29 AM

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@everyone. I am working on a game called dusk survival

📎 0604171523a.jpg

#

📎 IMG_20170622_181028_973.jpg

#

📎 1498051139147-1.jpg 📎 Thumbnail_1498162838932o.jpg

severe widget Jun 23, 2017, 1:31 AM

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Having never seen a skybox or a tree or a wall, I'd like to preorder your game!

#

Do I get to pick my game logo from these, or will a graphic designer do a final draft?

jolly siren Jun 23, 2017, 1:49 AM

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lol

#

I would go with the last image as your game logo

merry pawn Jun 23, 2017, 4:31 AM

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@deep orbit keep at it man. Don't let the haters and skeptic drag you down.

deep orbit Jun 23, 2017, 4:31 AM

#

K thank you

#

https://youtu.be/EKDbr_Y4QQ8

YouTube

Dusk Survival

Dusk survival coming soon

Hey guys I hope you like and subscribe if you guys want to know more about Dusk survival join this Discord!https://discord.gg/XersGtX

▶ Play video

#

@everyone could u sub to my channel it would help out alot:)

slim holly Jun 23, 2017, 8:52 AM

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ok lets not use @ everyone cuz it doesn't work, and especially for advertising

orchid cairn Jun 23, 2017, 9:58 AM

#

i know you can set DefaultOnlineSubsystem in DefaultEngine.ini, is there something along the lines of "SecondaryOnlineSubsystem"? for example, if i have steam as default, can i get it to drop back to null if steam isn't running on the system? or will it do that anyway?

slim holly Jun 23, 2017, 10:07 AM

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I think there's a fallback defined there somewhere

hasty adder Jun 23, 2017, 10:58 AM

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so weird

#

i had replicate movement and replicate on for a physics object.

#

was about to test turning off replicate movement and doing somthing else

#

and when i turned it off. the movment is still working.

#

maybe this was causing my problem...

#

so buildand upload to server i go.

chrome bay Jun 23, 2017, 11:14 AM

#

Is anybody managing to successfully use 'CancelFindingSessions' using the Steam subsystem?

#

Because it crashes like fuck for me

#

Everytime, no matter what

hasty adder Jun 23, 2017, 11:16 AM

#

ok so its working but not working ah ha, least i know where i stand

chrome bay Jun 23, 2017, 11:27 AM

#

Turns out if you cancel searching with a LAN session, steam subsystem crashes - because LAN sessions aren't a valid thing and the subsystem doesn't guard against nullptrs

#

Line 786 in OnlineSessionInterfaceSteam.cpp

#

ugh.. why let me create LAN sessions in the first fucking place. Why is the Steam system STILL shit...

#

/rage

chrome bay Jun 23, 2017, 11:50 AM

#

Interestingly when you cancel a search, the 'FindSessionsComplete' delegate fires afterwards. Ugh

fossil spoke Jun 23, 2017, 12:02 PM

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Curiouser and curiouser

sweet spire Jun 23, 2017, 12:16 PM

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How well do dedicated servers take advantage of xeon's and there multithreading?

chrome bay Jun 23, 2017, 12:27 PM

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They'll only do what you program them to. They won't multithread your code automatically.

sweet spire Jun 23, 2017, 12:27 PM

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sorry i mean, does UE4 not multithread automatically to help handle load?

chrome bay Jun 23, 2017, 12:28 PM

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The engine already does some stuff in different threads, but not a great deal. The main game loop runs on it's own thread, audio on it's own thread, particles on their own thread etc.

wary wyvern Jun 23, 2017, 12:28 PM

#

Hey guys! Did anyone run into this bug??
https://answers.unrealengine.com/questions/669599/replication-break-characters-mesh-on-begin.html

chrome bay Jun 23, 2017, 12:28 PM

#

But a dedicated server won't run anything different to how the game runs

sweet spire Jun 23, 2017, 12:28 PM

#

I was looking more towards dedicated servers

#

Ahh

#

Hmmm

#

that seams like an issue for anything with heavy load

chrome bay Jun 23, 2017, 12:29 PM

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The only thing they really do differnet is, they don't render anything, so you can save processing time there

sweet spire Jun 23, 2017, 12:29 PM

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I current have my test server hooked up with Two xeon 2670 seams like a waste

#

gotcha

#

then again

chrome bay Jun 23, 2017, 12:30 PM

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Yeah unless your game code is heavily multithreaded, it probably wouldn't be that useful

#

No more so than a core processor etc.

sweet spire Jun 23, 2017, 12:30 PM

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u could split ur map or w/e up in to 8 different dedicated servers on the same machine

#

and assign them a thread each

chrome bay Jun 23, 2017, 12:30 PM

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Well you could try :p

#

You can only be a member of one server at a time though

sweet spire Jun 23, 2017, 12:31 PM

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u could just client travel right?

#

leave one join another

#

im just thinking instances i guess

chrome bay Jun 23, 2017, 12:31 PM

#

Possibly, but clients in one game won't affect the other, you'll have to find a way to transfer data between servers yourself too

sweet spire Jun 23, 2017, 12:32 PM

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true true man

#

SQL database i would say then

#

also thank you for your insight

#

set entrance location

#

client travel

#

get entrance location

#

etc

chrome bay Jun 23, 2017, 12:34 PM

#

@wary wyvern no, but that definitely looks like a bug to me. Seems as though network smoothing is busted in 4.16

sweet spire Jun 23, 2017, 12:35 PM

#

rip networks

wary wyvern Jun 23, 2017, 12:35 PM

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We found a workaround, but must disable network smoothing mode. Some animations became glitchy(

chrome bay Jun 23, 2017, 12:35 PM

#

Are you using root motion?

wary wyvern Jun 23, 2017, 12:35 PM

#

Nope

chrome bay Jun 23, 2017, 12:35 PM

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Because that changed a LOT in 4.16

#

ok

#

Try diffing the character movement component on github, see what was changed

#

If you find out I'd be interested to know

wary wyvern Jun 23, 2017, 12:36 PM

#

Good idea)

chrome bay Jun 23, 2017, 12:37 PM

#

Hitting so many bugs today with core engine stuff. Driving me crazy

sweet spire Jun 23, 2017, 12:38 PM

#

If it makes you feel any better, i spent 5 hours once not be able to figure out why my engine would not compile

#

my friend put

#

"lol"

#

in one of the cpp files for a laugh

chrome bay Jun 23, 2017, 12:39 PM

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lol nice...

hasty adder Jun 23, 2017, 12:42 PM

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So nope that wasntnit

#

So here's a wuestion

#

If I turn off all replication of the actor to control it myself and say server spawns the real actor and then tells clients to spawn there own version that will update to follow servers transform around

#

What about client that joins after the event that told clients to spawn it

chrome bay Jun 23, 2017, 12:44 PM

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They won't spawn anything, unless it's replicated

#

Also I'm not sure why you'd want to do that, seems like it could cause all manner of issues

hasty adder Jun 23, 2017, 12:45 PM

#

Hmm brings me back to how to lerp a replicated physics object smoothly. I'm doing a sports game of sorts with a ball that's knocked around by clients much like rocket league

#

I have using normal ue4 replication and movment replication where it will jitter to catchup instead of interpt to where it should be

#

Maybe it's that I am allowing client side to influence it rather then only server side just trying to catch the lag when a client hits the ball allowing client side to see there simulation catchup with server smoother

#

I use a distance to ball check on key press and if in distance and in a angle in front of player cast to the ball to change its velocity

chrome bay Jun 23, 2017, 12:58 PM

#

You'd be better off just writing your own movement component and not using Physics

#

Ball physics are super easy to create

#

Projectile Movement Component also contains a lot of the required code for bounding off of and sliding along surfaces too

hasty adder Jun 23, 2017, 1:00 PM

#

I'd need help I'm no c+ rog rammer

chrome bay Jun 23, 2017, 1:00 PM

#

Never too late to start learning :p

#

Replicated Physics is one of the hardest problems there is for Multiplayer, it's not something that will be solved in BP unfortunately

#

But you can probably write a movement component in Blueprint, but smoothing and prediction etc. is going to be required

#

Anyone getting super slow download speed in Steam right now?

hasty adder Jun 23, 2017, 1:34 PM

#

Hm I'll keep researching away. I can understand code just getting it written and in a confident manner is another story 😃

chrome bay Jun 23, 2017, 1:57 PM

#

Right so, registering a game session on Steam - has this always never worked?

#

Just calling CreateSession in C++, non-lan

#

And another PC can't find that session

deep orbit Jun 23, 2017, 2:14 PM

#

https://youtu.be/EKDbr_Y4QQ8

YouTube

Dusk Survival

Dusk survival coming soon

Hey guys I hope you like and subscribe if you guys want to know more about Dusk survival join this Discord!https://discord.gg/XersGtX

▶ Play video

#

@everyone. Please sub to my channel

hasty adder Jun 23, 2017, 2:16 PM

#

Oh boy this subject it rough 😃

#

Is

#

I believe presence causes a problem for starters

#

I've never gotten it to work. Just used instead my own MySQL on a website to put and get master server info through php

#

Oh eait

#

Wait your not saying dedicated.

hasty adder Jun 23, 2017, 2:46 PM

#

So if I go down the rabbit hole of a projectile that should bounce. I run into an interesting hurdle.

#

I have an ability to draw the ball in like a magnet. That should bounce of a shield as well. So I have to figure the velocity I guess to have it go torward the player which is easy enough then on overlap of shield push it away. End result should be much like a ball on a string on a paddle

#

I can see how to accomplish this but another feat is also while jn this, another player should be able to attempt to knock it away. Get complicated eh.. Tho maybe I could make it if the player has it in this juggle so to speak the action of hitting it away disables the magnet before hitting it away. Hmm

hasty adder Jun 23, 2017, 3:14 PM

#

Thoughts?

📎 image.jpg

hasty adder Jun 23, 2017, 5:58 PM

#

Maybe if I'm rep notify the transform of the object I should also update the objects velocity from server eh

sterile pebble Jun 23, 2017, 7:37 PM

#

@hasty adder I sence python

hasty adder Jun 23, 2017, 7:52 PM

#

Hmm? Is that a format for Python?

ripe cypress Jun 24, 2017, 2:05 AM

#

Can someone tell me why I am not traveling to map ? Level1

📎 unknown.png

#

it is in editor but not built game

deep orbit Jun 24, 2017, 3:03 AM

#

@everyone. Can anyone help me with my game called Dusk survival on unreal engine 4 I really need some help

orchid cairn Jun 24, 2017, 8:51 AM

#

@deep orbit - probably dont use the everyone tag for stuff like that, and if you're after help, possibly post what your actual question is?

#

also, this probably isn't the right channel to be spamming your youtube trailer, then asking for help...

#

@chrome bay - out of curiousity, did you ever investigate using projectile movement component as a base for "physics" movement?

rare cloud Jun 24, 2017, 9:49 AM

#

@Jovanni5848#2951, promote your project on the #work-in-progress channel also it's hard to follow a project without any idea of the gameplay and the content.

sweet spire Jun 24, 2017, 11:19 AM

#

Quick wierd question, just to point me in the right direction, but how do u go about packaging dedicated servers? i know u can compile for dedicated in vs but, how do u go about packing the rest?

hasty adder Jun 24, 2017, 11:25 AM

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I use front end

#

Since usually you want to edit a ini you want to not pak them

chrome bay Jun 24, 2017, 11:29 AM

#

You need to use a Source Engine build if you want to create dedicated servers too

#

@orchid cairn I've written a networked movement component for this, which is based mostly on character movement but also uses some elements of Projectile Movement. The movement for the game is pretty simple (hovering pawns with sphere collision and bouncing off of surfaces)

https://www.youtube.com/watch?v=pov1irlMCXM&t=93s

hasty adder Jun 24, 2017, 11:31 AM

#

Jam, you ever use a dedicated server on Linux say aws and know what stuff is needed on the box to run?

chrome bay Jun 24, 2017, 11:31 AM

#

Nah I've not built one before, let alone a linux one :p

hasty adder Jun 24, 2017, 11:31 AM

#

Haha oh ok

#

I get it built but when I run it it needed dependency after dependency inatalled

#

So I'm like wtf no one ever made instruction 😃

orchid cairn Jun 24, 2017, 11:32 AM

#

@chrome bay are they using actual physics motion, or just faking it? if you're happy to share how you've done it i'd be incredibly apreciative 😃 especially since movement replication in 4.16 seems broken AF

chrome bay Jun 24, 2017, 11:32 AM

#

Faking it, same way Character Movement does it 😃

hasty adder Jun 24, 2017, 11:32 AM

#

That's my take away too

chrome bay Jun 24, 2017, 11:32 AM

#

Physics / PhysX replication is way too effing hard

hasty adder Jun 24, 2017, 11:32 AM

#

Broke @noble meadow

#

Lol

chrome bay Jun 24, 2017, 11:33 AM

#

And I needed control over the simulation too

hasty adder Jun 24, 2017, 11:33 AM

#

Hover tank?

orchid cairn Jun 24, 2017, 11:33 AM

#

linux ded shouldn't be that much more work than a win32 one, having said that, i have absolutely no experience in that regard... although i've built/deployed win32 dedicated servers to an EC2 instance, that was fun 😃

hasty adder Jun 24, 2017, 11:34 AM

#

I am going to install cent build on my fuckoff conouter

#

Computer

orchid cairn Jun 24, 2017, 11:34 AM

#

just VM it

chrome bay Jun 24, 2017, 11:34 AM

#

Hover Tank game uses the same approach atm, custom movement component faking physics like char movement. The problem is collision rejection for an object like that is hard, and it doesn't work so well for other vehicles (tracked, walkers etc.) - so I'm also trying to solve the online PhysX problem like a few others. I uploaded an early version but it's not finished: https://github.com/TheJamsh/UE4-Networked-PhysX-Component

orchid cairn Jun 24, 2017, 11:35 AM

#

i've got that forked, but honestly my PhysX and back end ue4 code knowledge isn't that great

hasty adder Jun 24, 2017, 11:35 AM

#

Don't use physics collision. Use on overlap and cast to other actor to do the impulse

chrome bay Jun 24, 2017, 11:37 AM

#

That's what the non-physics simulation does (it has to), but it's complicated when an object uses a complex collision and also has 6 DOF

sweet spire Jun 24, 2017, 11:38 AM

#

thank you for the answer

chrome bay Jun 24, 2017, 11:38 AM

#

But the way you do it is you move the component with a sweep, check for penetration, first move out of the penetration then calculate rejection. PhyX does a lot more than that, like sliding along surfaces, using Physical Material properties etc.

orchid cairn Jun 24, 2017, 11:38 AM

#

cylinder works fine for characters, but once you get funky shapes (tanks, spaceships) it gets alot tougher

sweet spire Jun 24, 2017, 11:38 AM

#

You know how each additional dedicated server on the same machine listens on port 7777 then 7778, 7779 etc can u connect to them via like 127.0.0.1:7778 for example? does that work on LAN?

noble meadow Jun 24, 2017, 11:39 AM

#

you called, @hasty adder ? 😁

orchid cairn Jun 24, 2017, 11:39 AM

#

sure does, just make sure you're specifying what ports when you spin up each server

noble meadow Jun 24, 2017, 11:39 AM

#

https://i.imgflip.com/7jovm.jpg

chrome bay Jun 24, 2017, 11:39 AM

#

I've managed to copy what PhysX does for my orb movement component, which is sphere collision (so it's nice an easy), and since I have control I can do a few other things like spraying decals / particles along surfaces we're sliding along etc, and handling special weapons that move it through objects. - but complex shapes are hard.

sweet spire Jun 24, 2017, 11:39 AM

#

Intresting fact each additional one incriments its self up 1 port

hasty adder Jun 24, 2017, 11:39 AM

#

Just wanted to use your name in the context as fuck

#

😃

sweet spire Jun 24, 2017, 11:39 AM

#

so i guess that makes management alot easier haha

noble meadow Jun 24, 2017, 11:40 AM

#

😄

chrome bay Jun 24, 2017, 11:40 AM

#

That should work I think @sweet spire

sweet spire Jun 24, 2017, 11:40 AM

#

Okay thank you ^^ hope u guys are all having a good day!

chrome bay Jun 24, 2017, 11:41 AM

#

I should just do a start-to-stop walkthrough of making a movement component.. but man it would take ages

orchid cairn Jun 24, 2017, 11:42 AM

#

you seem to be the one who has the best grasp of it (if we ignore rama's non authorative solution)

chrome bay Jun 24, 2017, 11:44 AM

#

Yeah Rama's version is super easy to do.. but server-auth is tough. There's still a few bits of character movmenet I don't fully understand (the timestamp verification stuff), so I need to go over that more first. I haven't even bothered with root motion haha

orchid cairn Jun 24, 2017, 11:44 AM

#

if anyone was able to build a "Physics Movement Component" and put it on the marketplace, you'd make a goddamn killing off it, it's the one big thing UE4 seems to lack if they want to be considered a true "out of box" multiplayer engine

hasty adder Jun 24, 2017, 11:44 AM

#

Is the Rama version the super excited about platforming balls?

orchid cairn Jun 24, 2017, 11:45 AM

#

i know rocket league went with bullet over PhysX, i'm assuming there are various reasons, but the main one i can see if bullet is fixed timestep

hasty adder Jun 24, 2017, 11:45 AM

#

You and me both alc

chrome bay Jun 24, 2017, 11:45 AM

#

Yeah, Blue Man has been working on one too and has very promising results - but we're yet to see a finished version. The hardest part is making it work for all situations

sweet spire Jun 24, 2017, 11:45 AM

#

is there a command attribute to enable cmd windows for servers?

chrome bay Jun 24, 2017, 11:46 AM

#

The hardest part I found was actually creating a new PhysX scene for replay. Once I've done that, my version would be finished. I just need to find time to get back to it

#

And fix a few of the timing errors, there's one very big timing flaw in there atm

hasty adder Jun 24, 2017, 11:47 AM

#

Gameserver -log or do you mean you can actually type in it?

orchid cairn Jun 24, 2017, 11:47 AM

#

i saw something when i was looking through 4.16 talking about PhysX scenes, epic might have exposed something that might help you there (cant remember where it was tho)

sweet spire Jun 24, 2017, 11:47 AM

#

Both would be nice

hasty adder Jun 24, 2017, 11:48 AM

#

Log shows you what's happened but can't type in it

orchid cairn Jun 24, 2017, 11:48 AM

#

@sweet spire release servers wont have a command line or console generally? you pretty much control everything through command line params when you spin it up and let it go from there

sweet spire Jun 24, 2017, 11:49 AM

#

It was more for being able too output information as when your run dedicated server nothing tends too pop up

#

i tried -log but nothing is coming up or im missing something obvious

hasty adder Jun 24, 2017, 11:49 AM

#

Google : https://forums.unrealengine.com/showthread.php?67467-Dedicated-server-console

sweet spire Jun 24, 2017, 11:49 AM

#

i might just spawn one via c++

orchid cairn Jun 24, 2017, 11:49 AM

#

yeah you can use Server.exe -LOG if you need a visible log

sweet spire Jun 24, 2017, 11:49 AM

#

oh inphidel beat me too it

#

haha

hasty adder Jun 24, 2017, 11:49 AM

#

Lol

orchid cairn Jun 24, 2017, 11:49 AM

#

but again, dedicated servers shouldn't need that

hasty adder Jun 24, 2017, 11:50 AM

#

Fire n forget

#

Pew pew

#

Oh this reminds me I decided to build a server client build with my ball net uodates to something stupid large

#

Like 1000 ps

#

I wanna see how funk it is

sweet spire Jun 24, 2017, 11:54 AM

#

📎 unknown.png