#multiplayer | Unreal Source | Page 432

prime axle Dec 12, 2018, 1:35 AM

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Cause moving from MainMenu to Gameplay is basically a JoinServer

fossil spoke Dec 12, 2018, 1:35 AM

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Are you using Blueprint?

prime axle Dec 12, 2018, 1:35 AM

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c++

fossil spoke Dec 12, 2018, 1:35 AM

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Ah ok

prime axle Dec 12, 2018, 1:35 AM

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Dedi Server aswell

fossil spoke Dec 12, 2018, 1:36 AM

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Well you can go a few routes, you can pass the choice as an Option to the Server upon connecting.

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An Option is a String which can hold "settings" for example

prime axle Dec 12, 2018, 1:36 AM

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Where would I pass it through though? GameInstance/GameState/GameMode will al be reset

fossil spoke Dec 12, 2018, 1:36 AM

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You would then parse that Options string and react to it based on the information

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However your OSS handles the connection of a local Player to the Server

prime axle Dec 12, 2018, 1:37 AM

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currently a console command of "Open XX.XX.XX.XX"

fossil spoke Dec 12, 2018, 1:38 AM

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Usually ClientTravel() would be your most common way.

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http://api.unrealengine.com/INT/API/Runtime/Engine/GameFramework/APlayerController/ClientTravel/index.html

APlayerController::ClientTravel

Travel to a different map or IP address.

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The URL param is where you build the connection information + the Options

prime axle Dec 12, 2018, 1:39 AM

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Does the PlayerController "Stay Alive" when going from MainMenu to Gameplay?

fossil spoke Dec 12, 2018, 1:39 AM

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"127.0.0.1?Character=MyAwsomeCharacter"

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No it doesnt

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A new PlayerController will be created and assigned to the incoming player once they connect to the Server

prime axle Dec 12, 2018, 1:40 AM

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Just wondering then how ClientTravel() will keep my choices alive if it's part of the PlayerController

fossil spoke Dec 12, 2018, 1:40 AM

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But it will have its Options appended once its created

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Its sending the choice as part of the connection request

prime axle Dec 12, 2018, 1:41 AM

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Just trying to wrap my head around all of it, just so I get a good understanding, sorry for all the questions, Appreciate you trying to help me

fossil spoke Dec 12, 2018, 1:41 AM

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https://wiki.unrealengine.com/Passing_Arguments_To_Server_During_Connection

Passing Arguments To Server During Connection

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Check this out

prime axle Dec 12, 2018, 1:43 AM

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oh that's actually really cool, thanks!

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so I'll have my Gamemode to a custom one with None on my Pawn
When joining I'll pass whatever parameters I need
And in the InitNewPlayer function i'll override it, parse my paramaters and spawn the correct character based on those paramaters

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Yea; I get it now. Huge thanks man! Appreciate the help!

fossil spoke Dec 12, 2018, 1:44 AM

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Yep exactly

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👍

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No worries.

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Good luck.

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Your not limited to what you can pass via this method, use your imagination.

prime axle Dec 12, 2018, 1:46 AM

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is there a difference between the console command "Open IP" and ClientTravel("IP", TRAVEL_ABSOLUTE)?

fossil spoke Dec 12, 2018, 1:46 AM

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Honestly not sure, i rarely use the Console command.

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Search for it in the codebase and take a look

prime axle Dec 12, 2018, 1:46 AM

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I assume they're similair to what I intend to use them as. Just wanted to be sure 😉

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Alright, I'll leave you to your peace now! Again, thanks! 😄

fossil spoke Dec 12, 2018, 1:47 AM

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It may do different stuff depending on whos calling the console command.

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For example if its the Server calling it instead it might do a hard travel or something

rain coral Dec 12, 2018, 12:15 PM

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Is it possible to spawn something only on the server without automatically spawning it on the clients as well?
I need to let clients spawn their own local versions of this object (an item they spawn with), otherwise when clients call functions on the item, it has server authority, which is a no-go

rain coral Dec 12, 2018, 1:00 PM

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So, to put it short, the problem is that this runs on the client:

📎 unknown.png

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It doesn't spawn the shot on the server, but it executes on client (for some reason) then a couple of ms later on server (like it should)

manic pine Dec 12, 2018, 1:03 PM

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authority identifies the one who made the object

mighty schooner Dec 12, 2018, 1:04 PM

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Hi @rain coral Out of curiosity would you mind showing the code behind PRINT1

manic pine Dec 12, 2018, 1:04 PM

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if its a server-made object that is replicated to clients, then HasAuthority should return false on all clients

rain coral Dec 12, 2018, 1:04 PM

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@mighty schooner

📎 unknown.png

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@manic pine Hmm yeah okay. the challenge is that the clients should initialize some stuff on the weapons when spawned. but if the code to spawn the guns only runs on server, they are still replicated to the clients. so the server must spawn the guns, then.. pass a reference to it to each client so they can interact with it? Doesn't sound right

mighty schooner Dec 12, 2018, 1:07 PM

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Thank you @rain coral I was trying to automate FString::Printf to try and avoid typing it all the time with Args

rain coral Dec 12, 2018, 1:07 PM

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@mighty schooner Ah, yeah, my method has worked nicely so far =]

manic pine Dec 12, 2018, 1:09 PM

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are you trying to do something original, or are we just talking about regular carried/equipped weapons

rain coral Dec 12, 2018, 1:10 PM

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It's like a load-out, just something each client spawns with at the start

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so yeah, carried weapons

manic pine Dec 12, 2018, 1:11 PM

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and you wanna change the weapon from the client?

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if this was about selecting a weapon at start, then client should start with no weapon then RPC server to request a selected weapon... if this was about modifying an existing weapon, the server should spawn it and then client uses rpc on the weapon to change it after its been received(and owned) by client

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either way im not sure i see the problem, unless one of us has misunderstood something

rain coral Dec 12, 2018, 1:16 PM

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Yeah, I have some trouble explaining my thoughts in simple enough terms sometimes. the core of the issue is that spawning a bullet should only be done by the server, but instead it happens on the client (because they spawned and own the gun), then later on the server as well, which is replicated to the clients. so the clients fire twice

manic pine Dec 12, 2018, 1:17 PM

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right, thats a simple matter of having a hasauthority check, or only firing bullets from a function thats part of a server RPC chain

rain coral Dec 12, 2018, 1:17 PM

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I suppose a harmless approach would be to check if the owner of the gun has authority, not the gun itself

manic pine Dec 12, 2018, 1:17 PM

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while the client function only does visual stuff

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if your HasAuthority is returning true on the client, then you've done something wrong

rain coral Dec 12, 2018, 1:17 PM

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the HasAuthority check is on the gun itself at the moment, which returns true for clients as well

manic pine Dec 12, 2018, 1:17 PM

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right, in that case the client is actually spawning a weapon too

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because it shouldnt

rain coral Dec 12, 2018, 1:19 PM

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yeah. so gotta.. I guess, call a server command to spawn the gun for them

manic pine Dec 12, 2018, 1:20 PM

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depends, not if the server can already know which weapon theyre supposed to have

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but if its a selection screen or something, then yeah

rain coral Dec 12, 2018, 1:20 PM

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the server decides the loadout, so it's not the clients' choice

manic pine Dec 12, 2018, 1:21 PM

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right, in that case the client doesnt need to tell the server which weapon to select

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since server already knows

rain coral Dec 12, 2018, 1:22 PM

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I'm just confused about how to let the clients have a reference to this weapon. they don't spawn it themselves, but they've gotta register it so the rest of the game-code works

manic pine Dec 12, 2018, 1:22 PM

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yeah, the standard way of doing that is that your character has a

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AWeapon* EquippedWeapon field

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thats replicated

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with a repnotify so the client can tell when his weapon changed

rain coral Dec 12, 2018, 1:23 PM

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yeah, that makes sense!

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thanks =)

manic pine Dec 12, 2018, 1:23 PM

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no problem

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just make sure to check it for nullptr whenever you wanna use that field

rain coral Dec 12, 2018, 1:24 PM

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yeah, I think I already do that

wary wyvern Dec 12, 2018, 2:11 PM

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Guys, is it possible to make Mobile HDR be a bit faster?) I try to launch very simple scene on Snapdragon 625 with 30 fps only.. There are just 15 meshes and baked lighting.

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It looks like Unreal becomes more heavier each version, there are no optimizations (

rain coral Dec 12, 2018, 2:36 PM

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@manic pine Trying to get this working now (it works.. 10% of the time?), but running into a problem. when I start the game, 9 / 10 times or so, the clients just freeze in air, and nothing gets replicated from the server. I did a 'netprofile' and looking through the Network Profiler, no properties get replicated. sometimes one of the clients function correctly, though without getting the weapon callback, and sometimes (rarely) both clients spawn, get the weapon callback, and everything works as it should, with no issues 🤔

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seems to have a lot to do with whether the editor is maximized or in a smaller window

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it pretty much always works if the editor is maximized and covering the whole screen, and pretty much never works if the editor is a floating window

cedar finch Dec 12, 2018, 3:31 PM

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@winged badger @sharp pagoda So you guys I wanted to thank you for helping me with my Player HUD and Name questions. You guys taught me a lot and with that knowledge believe it or not I actually found out how to make it all work without using an override or the Event Possessed node. I took a break yesterday from UE4 and just thought over my issue of having to use delays in order to get my HUD stuff to show up correctly with clients and then it hit me. What I did was create an event inside my PlayerController that updates the players HUD with correct health values etc. I then call that event inside my Gamemode right after I spawn and possess the Pawn. It seems to work for both server and client perfect and got rid of all my delays. 😃

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That's why i love this discord. I can discuss issues with people who are knowledgeable and then learn from those discussions. I hope I wasn't too annoying with all my questions I just love soaking up as much useful information as possible. You guys are great. Thanks again.

manic pine Dec 12, 2018, 4:11 PM

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@rain coral that does indeed sound weird... first confirm you dont have any error logs, then check server hasnt frozen, then confirm the clients actually receive their pawns, then find out if beginplay is being called on both server and clients

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unless you can just look at your code and find something obviously wrong

chrome bay Dec 12, 2018, 5:16 PM

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Well this is utterly incredible:
https://www.unrealengine.com/en-US/blog/epic-2019-cross-platform-online-services-roadmap?utm_campaign=Oktopost-2018-12 General Campaign&utm_content=Oktopost-twitter&utm_medium=social&utm_source=twitter&sessionInvalidated=true

Unreal Engine

Epic 2019 Cross-Platform Online Services Roadmap

Throughout 2019, we’ll be launching cross-platform game services originally built for Fortnite, and battle-tested with 200,000,000 players across 7 platforms. These services will be free for all developers on all engines, all platforms, and all stores. Developers can choose...

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dat link tho

cedar finch Dec 12, 2018, 5:55 PM

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Anyone read about SpacialOS? Sounds cool but I have no clue if it really can work

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https://gdk.improbable.io/spatialos-gdk-unreal?utm_source=epic-marketplace&utm_medium=referral&utm_campaign=unreal-gdk-launch

Introducing: SpatialOS Game Development Kit for Unreal Engine

SpatialOS GDK for Unreal Engine: a hosted service that allows you to go beyond a single dedicated server instance whilst using the Unreal Engine’s networking API.

twin juniper Dec 12, 2018, 8:05 PM

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If I make a session, and save the session info thing, can I use it to feed the join session node? Without online subsystem. I got the discord plugin to work and it has a join game functionality, but it says that you have to figure out how to match them using the match ID string. And idk how to make it work

hasty adder Dec 12, 2018, 8:30 PM

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Dumb question maybe. Maxplayers on ossnull, does this auto refuse new connections/spec connections or would I need to do some legwork ?

thin stratus Dec 12, 2018, 8:35 PM

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If MaxPlayers is properly set

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It should kick players

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If they try to join

hasty adder Dec 12, 2018, 8:39 PM

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This is normally only exposed in the initial and not BP right?

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*ini

twin juniper Dec 12, 2018, 8:40 PM

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Ok I will rephrase my question to be more understandable, I know I'm bad at explaining.

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Can I make a player connect to other by ip without port forwarding

hasty adder Dec 12, 2018, 8:47 PM

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Port forwarding is a required aspect of networking. You can only from outside the other clients network find there public router IP. This needs to then figure out how to known who on the local area gets the connection

sharp pagoda Dec 12, 2018, 8:50 PM

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Your question is confusing but no you don't need port forwarding to open a connection between two sockets. You're not specifying your NAT requirements, but in the case of non-symmetric NAT you can use STUN protocol to link two endpoints through a middleman server already on the public internet. In the case of you as a client behind a NAT connecting to a server without a NAT, you don't need portforwarding. @twin juniper

jagged garden Dec 12, 2018, 11:10 PM

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@cedar finch I've done research on it and it looks alright but really expensive

cedar finch Dec 13, 2018, 12:00 AM

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@jagged garden Oh I couldn't ever find a price. That should have been a warning sign lol

jagged garden Dec 13, 2018, 12:01 AM

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haha yeah i had to look for a while and when I found it it never actually gave a number price

twin sorrel Dec 13, 2018, 1:51 AM

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Is there a way to replicate an event to the server and have it run on the client, without having to create 2 events?

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Here's an example of what i am doing right now, someone let me know if there's a better way to do it. Thanks 😃

📎 unknown.png

jagged garden Dec 13, 2018, 1:56 AM

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thats pretty much as simple as it gets

twin sorrel Dec 13, 2018, 2:01 AM

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Ah ok

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Was just wondering if it could get simpler

meager spade Dec 13, 2018, 2:48 AM

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well you can kinda make it less blockyu

quasi quail Dec 13, 2018, 5:57 AM

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Sorry guys....noob 5000 here, cant seem to get this custom event to fire. It fires fine if I dont replicate it but when I change it to run on server it does not fire anymore. https://imgur.com/a/rru7WYZ

Imgur

sharp pagoda Dec 13, 2018, 6:03 AM

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@quasi quail Assuming this actor is properly replicated and what not, you're dealing with roles. If you take a look at this graph, you know it's one of the three "Dropped" situations.

📎 unknown.png

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Have you taken a look at exi's network compendium? If not, I would highly recommend it for learning about these things.

quasi quail Dec 13, 2018, 6:05 AM

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I shall google that now, for this I was following a simple tutorial and it seemed easy peasy for him.

sharp pagoda Dec 13, 2018, 6:05 AM

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

quasi quail Dec 13, 2018, 6:06 AM

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ohh wow you gave me a complete network bible here??? hahahaha this requires a weekend and a lot of coffee

sharp pagoda Dec 13, 2018, 6:07 AM

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Yea, but it is absolutely worth the read though. Once you're done you'll have a fairly strong understanding of what you're doing.

quasi quail Dec 13, 2018, 6:08 AM

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thanks a lot friend!

twin sorrel Dec 13, 2018, 6:30 AM

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Hey guys! Does anyone have any idea why updating the relative transform of my mesh seems to be delayed to other players?

next warren Dec 13, 2018, 7:04 AM

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For multiplayer shooting using projectile is best or line trace is best

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And also for network bandwidth which is best or both use same amount of bandwidth

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Thanks in advance

twin sorrel Dec 13, 2018, 7:12 AM

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AFAIK line trace is less expensive

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Projectiles essentially perform multiple line traces throughout the flight to 'sweep' the path as far as i'm aware

lean river Dec 13, 2018, 8:12 AM

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obviously projectile movement using more bandwith when you replicate all the movement
but i think no games using traditional "replicated projectile movement" where you spawn projectile on server and replicate them down because latency will make that really unresponsive 😃

next warren Dec 13, 2018, 8:24 AM

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https://m.youtube.com/watch?v=7krvAVH3ZqA

YouTube

Tom Looman

Switch: Bullet Tracers FX WIP [Unreal Engine 4]

Work in progress for bullet tracers particle effects for Switch. Grey Games - Mitch Manders & Tom Looman More info & dev updates: http://tomlooman.com Twitte...

▶ Play video

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In this video whether he is using line trace particle effects or projectile effects

chrome bay Dec 13, 2018, 10:53 AM

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Impossible to know

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Willing to bet it's hitscan weapons, just shooting particles in the same direction. Common trick.

next warren Dec 13, 2018, 11:18 AM

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Can u give some tutorials link like this method of using

lament bobcat Dec 13, 2018, 11:31 AM

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unreal

pallid mesa Dec 13, 2018, 11:48 AM

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@next warren that's a linetrace with a cool tracer (trace particle effect). It is not perfect, but in some scenarios can trick the player to think that it's a projectile, specially with fast rate of fire weapons. However forget about having bullet decay or something similar. Basically linetraces are cheaper however you are limited by the fact that they are just that, a line.

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also if you want to know how to do it, you just had to scroll down to the comments

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he is using this method on this project https://github.com/tomlooman/EpicSurvivalGameSeries

GitHub

tomlooman/EpicSurvivalGameSeries

Third person survival game (tutorial) series for Unreal Engine 4. - tomlooman/EpicSurvivalGameSeries

next warren Dec 13, 2018, 11:53 AM

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@pallid mesa thanks bro

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But can u give some tutorial in blueprint format

pallid mesa Dec 13, 2018, 11:55 AM

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well a particle effect is not made on Blueprints, it is made on Cascade or on its deffect on Niagara

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just download the project, open it on ue 4.20

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and open and study how the particle effect is made

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plain and simple

next warren Dec 13, 2018, 12:07 PM

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particle which is made in maya and imported to ue4..from how can i do using blueprint

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Can u give some overall procedure or tutorial link

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I tried using projectile but it takes lot of network bandwidth and gets lag

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How to make particle travel from start of line trace to end

pallid mesa Dec 13, 2018, 12:37 PM

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maya? lol no, the particle is done on ue4

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I'm telling you fetch the files of the project and look at how the particle is setted up

next warren Dec 13, 2018, 12:43 PM

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K bro i will see...

twin juniper Dec 13, 2018, 2:37 PM

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@sharp pagoda sorry for response so late, continuing the IP talk, so I have to use STUN so i can join through non port forwarded routers? Or do I need to just use an external IP address with a port?

sharp pagoda Dec 13, 2018, 4:23 PM

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@twin juniper if you're trying to connect two peers behind routers together STUN should be your first and hopefully final attempt. In the event that it fails (one peer is behind a symmetric NAT, a very rare occurance these days, so you probably dont have to worry about it) you use TURN.

twin juniper Dec 13, 2018, 4:26 PM

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and how do i implement it in ue4?

sharp pagoda Dec 13, 2018, 5:17 PM

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You need to read through the net framework to understand how the netdriver works with sockets and how unetconnection's are established

next warren Dec 13, 2018, 5:26 PM

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@pallid mesa thanks bro now only i learnt particles in ue4 i got the concept thankzzz bro

pallid mesa Dec 13, 2018, 5:27 PM

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😄 👍

next warren Dec 13, 2018, 5:27 PM

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😀

unique thunder Dec 13, 2018, 6:24 PM

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I don't understand the documentation on Replicate Physics to Autonomous Proxy -- should essential physics (like vehicles) be True but other visual-only items be False (like empty shells ejecting out of a gun)?

broken heart Dec 13, 2018, 7:05 PM

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Does anyone know of a good tutorial/course/article about making a ue4 matchmaking system with many game instances on the same server?

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The idea is kind of like hearthstone or clash royale -you press “search” and are put into a game with another person who searched. I’m quite new to replication so I’m not sure where to start and I don’t really want to watch a half hour video that isn’t useful. Thanks 😃

thin stratus Dec 13, 2018, 7:11 PM

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Doubt there are any tutorials

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This isn't possible with UE4 alone

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You need a backend service that does the matchmaking

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As well as a service that hosts, launches and kills the Server Instances

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Each Server in UE4 can only hold one World

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So you need one server per match

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@broken heart

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Maybe if Epic releases their Subsystem during 2019, it'll get more straight forward

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But I think for the servers on demand even they use a third party service

broken heart Dec 13, 2018, 7:17 PM

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Oh damn

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thanks for the advice though 😃

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Do you have any names for such backend services?

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Or would I just have to get a web hosting plan that has servers for me to run the game on?

thin stratus Dec 13, 2018, 7:24 PM

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GameLift

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Stuff like that is pretty expensive

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So be sure that you can pay for this service and that you will actually have the playerbase to support it

broken heart Dec 13, 2018, 7:30 PM

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Eeek

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Barely have a budget 😛

thin stratus Dec 13, 2018, 7:31 PM

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Then forget about matchmaking like this

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Singleplayer or ListenServer base games are already pretty expensive to create.
With barely a budget you should rather focus on that

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Even if the DedicatedServers are Linux based, it'll still cost multiple hundreds to have multiple servers running

broken heart Dec 13, 2018, 7:32 PM

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Damn

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I mean play B is to release a demo and kickstarter it

thin stratus Dec 13, 2018, 7:33 PM

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That's one way. But even then you should be aware of these systems requiring a big player base

broken heart Dec 13, 2018, 7:33 PM

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Yep

thin stratus Dec 13, 2018, 7:33 PM

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Otherwise getting matchmaked won't work

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It might be worth rethinking your project and situation.
It's not the worst move to focus on something cheaper and doable and revisit this project once you can realize it

broken heart Dec 13, 2018, 7:34 PM

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Need a fairly big discord server beforehand

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I've got a gam eon the store already but I don't see how continuing developing it is going to help me in the long run, it simply can't raise those funds

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But thanks for all the help

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I'll go rethink

twin sorrel Dec 14, 2018, 3:52 AM

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Hey guys and gals! I'm not sure if this is where i should ask this, however i am attempting to set the relative rotation and location of my mesh in my Character blueprint whilst the character movement mode is set to custom. The owning client shows this change, however the other clients only see the change when the player is at a stop.

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I have a feeling that the CharacterMovementComponent is setting the relative rotation itself when the player moves, and is overriding.

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PS: i have set orient rotation to movement to false, and even use controller desired rotation to false aswell, however the problem still occurs

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Any help would be appreciated 😄

jade gazelle Dec 14, 2018, 4:12 AM

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Is it possible to multicast only to a specific group of clients? Like say those within a specific radius from a location vector?

ember needle Dec 14, 2018, 10:47 AM

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This happens only after I had an editor crash. No code change.

lean river Dec 14, 2018, 10:53 AM

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@jade gazelle
no way to do this with multicast i guess..
you need iterate over on the player controller and send client event instead of multicast if condition passed

jade gazelle Dec 14, 2018, 12:07 PM

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@lean river yeah I was thinking about that last night. Seems like I would have to get a list of actors/controllers and then do a “run on owning client” for each of them

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Not sure if that is more efficient than just doing a multicast to everyone though

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It’s for particle system replication

lean river Dec 14, 2018, 2:19 PM

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well if you wanna simplify the system and skip controller iteration and code implementation into controller

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you can do a multicast then atleast you can check if player is close enough to spawn particle or not 😃

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both solution has pro and con

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con: iterating over player controller need code implementation in pawn or controller because only they have owned connection to send "run on owning client" event
pro: you save some network bandwith and rpc processing since you send only a few if players are far away

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pro: using multicast is super simple and also you can do clean code because you can implement where you want
con: rpc's will be processed everytime and you need decide on client side if you wanna spawn particle..

gilded olive Dec 14, 2018, 5:39 PM

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hi guys quick question, there is any channel or forum were we can specifically talk about the replication graph/nodes?

jade gazelle Dec 14, 2018, 5:48 PM

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@lean river right. Thanks for the detailed response. My main concern was/is minimizing server bandwidth whenever possible so I may go the iteration route. I don’t mind writing the additional logic in the player controller if it will help reduce overhead

junior tree Dec 14, 2018, 6:16 PM

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so is it possible to run the same game on android and pc?

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like, I create a session from PC and connect with a mobile phone via LAN running the same project

lean river Dec 14, 2018, 6:33 PM

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@jade gazelle glad to help 😉

thin stratus Dec 14, 2018, 6:57 PM

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@junior tree On LAN, yes.

junior tree Dec 14, 2018, 7:07 PM

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Nice! Thanks

wary willow Dec 14, 2018, 7:34 PM

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It's how that PS4 PlayLink thing works also (but in this case, PS4 + Mobile)

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Which is pretty cool actually. Just played my first game "Hidden Agenda" on it a few weeks back

ember needle Dec 14, 2018, 8:17 PM

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Good evening everyone! So, I spawn a spectator class, and then blend the view target on BeginPlay to the first player already in the level. This works only if I put a delay node before this... any ideas why? https://gyazo.com/467616f8092bec064fa67e08e139b1b9

Gyazo

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GET does return a valid player

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and so does Get Player Controller

thin stratus Dec 14, 2018, 8:20 PM

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Because your PlayerController is set to auto manage the viewtarget

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Open your custom PlayerController class

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And check the Class Defaults

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There is a boolean with "AutoManage..."

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@ember needle

ember needle Dec 14, 2018, 8:22 PM

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oh interesting

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let me try disabling it

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AH you can't disable it at runtime

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hmmm

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i need a different controller for a spectator I guess?

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not sure how to do that since it is specified from the GameMode

thin stratus Dec 14, 2018, 8:25 PM

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No

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You can't swap the Controller runtime

ember needle Dec 14, 2018, 8:25 PM

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You're on the spot though if I disable it at least the spectating works

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so what is a good practice there?

thin stratus Dec 14, 2018, 8:25 PM

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How are you spectating?

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Giving them a Spectator Pawn?

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Some fixed Camera?

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Another Player?

ember needle Dec 14, 2018, 8:26 PM

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if you join a game in progress, I randomly choose one player, the GameMode spawns a spectator class instead of a player class

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and then i blend the view mode of the spectactor to the player

thin stratus Dec 14, 2018, 8:26 PM

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Why do you need a Spectator Pawn

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If you want to spectate another player

ember needle Dec 14, 2018, 8:27 PM

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Well I need to spawn something in the Spawn Default Pawn for function...

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no?

thin stratus Dec 14, 2018, 8:27 PM

#

No

ember needle Dec 14, 2018, 8:27 PM

#

oh

thin stratus Dec 14, 2018, 8:27 PM

#

You can just spawn nothing

#

The ViewTarget doesn't require you to have a pawn

#

Only a PlayerController

ember needle Dec 14, 2018, 8:27 PM

#

that's indeed true

thin stratus Dec 14, 2018, 8:27 PM

#

And if you want to do it really super duper properly, read yourself into the CameraManager class

ember needle Dec 14, 2018, 8:27 PM

#

so best bet is to put this in the controller

thin stratus Dec 14, 2018, 8:27 PM

#

Cause that's the one actually doing all the work

ember needle Dec 14, 2018, 8:28 PM

#

let me try first this quick thing

thin stratus Dec 14, 2018, 8:28 PM

#

PlayerCameraManager to be precise

#

Yop

ember needle Dec 14, 2018, 8:28 PM

#

But I still need to disable the AutoManage though...

#

and I don't seem to be able to have different controllers on a level

thin stratus Dec 14, 2018, 8:29 PM

#

Usually, no. Because if your PC doesn't possess anything, it won't auto manage

ember needle Dec 14, 2018, 8:29 PM

#

ok

#

Let me try

thin stratus Dec 14, 2018, 8:29 PM

#

And if it still does, then just handle the ViewTarget yourself

#

The proper way would be:

Make your own PlayerCameraManager Class Child Blueprint.
Set that in your own PlayerController.
In the PCM Class, override the "BlueprintUpdateCamera" function.
Here you can return a CameraTarget, Location, Rotation and even FOV
Determine by code if your Player is a Spectator or not and if he has a Pawn or is Spectating one.
Either way, get a ref to either the Players Pawn or the Spectators Pawn and return it.

#

With that you can do a lot more. E.g. focus the person who killed you and what not

ember needle Dec 14, 2018, 8:33 PM

#

So: first of all thank you, this works

thin stratus Dec 14, 2018, 8:34 PM

#

-_- How can it be that my Pawn is off in Location and Rotation on the first freaking tick, even though Velocity, Acceleration for Linear and Angular stuff is the same:
https://puu.sh/ChFlw/cff7d5de24.png

#

I dislike networked movement so much

#

I mean, I get it, floating point shit, but still...

ember needle Dec 14, 2018, 8:35 PM

#

...

winged badger Dec 14, 2018, 8:35 PM

#

floating point precision 😄

ember needle Dec 14, 2018, 8:35 PM

#

don't think I can help besides the floating point

thin stratus Dec 14, 2018, 8:35 PM

#

No worries, just venting

ember needle Dec 14, 2018, 8:35 PM

#

😄

thin stratus Dec 14, 2018, 8:35 PM

#

Have to get this drone synced over net, but getting corrections even with an 8ms ping

#

I kinda know what I all need to send to the server, but they still go offsync

#

(╯°□°）╯︵ ┻━┻

winged badger Dec 14, 2018, 8:35 PM

#

at least that should be well within tolerance

ember needle Dec 14, 2018, 8:36 PM

#

Hey Cedric, just one question before I dive in your advanced suggestion.. In the Spawn Default Pawn for I set a replicated variable
https://gyazo.com/94a105da8e0cbb5005e13331c5664b1d

Gyazo

thin stratus Dec 14, 2018, 8:36 PM

#

It is, but it snowballs @winged badger

ember needle Dec 14, 2018, 8:36 PM

#

and in the OnRep that's where I set the spectate camera code

#

does this make sense?

thin stratus Dec 14, 2018, 8:36 PM

#

Yeah, you can do that

ember needle Dec 14, 2018, 8:36 PM

#

I cannot multicast it...

thin stratus Dec 14, 2018, 8:36 PM

#

Might be worth maybe setting it on the PlayerState though

ember needle Dec 14, 2018, 8:36 PM

#

server sends it before client exists

#

gotcha

thin stratus Dec 14, 2018, 8:36 PM

#

Do it in PostLogin

#

That's the first point at which you are allowed to use RPCs

#

But a Replicated Boolean should be enough

ember needle Dec 14, 2018, 8:37 PM

#

yeah good point

thin stratus Dec 14, 2018, 8:37 PM

#

You can use that in the PCM

ember needle Dec 14, 2018, 8:37 PM

#

ok thanks

thin stratus Dec 14, 2018, 8:37 PM

#

Or in your own setup of course

ember needle Dec 14, 2018, 8:37 PM

#

ok really last one for tonight...

#

IsLocallyControlled works only on pawns

#

is there a similar function for controllers?

thin stratus Dec 14, 2018, 8:38 PM

#

📎 unknown.png

#

Don't worry I have nothing better to do anyway

sharp pagoda Dec 14, 2018, 8:38 PM

#

IsLocalController() @ember needle

thin stratus Dec 14, 2018, 8:38 PM

#

Or IsLocalPlayerController works too

ember needle Dec 14, 2018, 8:39 PM

#

isn't that true also for server? IsLocalController

sharp pagoda Dec 14, 2018, 8:39 PM

#

Wow that does spiral out of control fast

#

If you're a listen server and are the auth, yea

thin stratus Dec 14, 2018, 8:39 PM

#

Seems to be only the rotation though

#

Thing is, I don't know if it's AngVelocity that kills rotation

#

Or Rotation that kills AngVelocity

#

kills = makes it offsync

winged badger Dec 14, 2018, 8:40 PM

#

hows your gravfity situation?

#

can't help but notice some changes in location Z

thin stratus Dec 14, 2018, 8:40 PM

#

Velocity z should have gravity already in it

winged badger Dec 14, 2018, 8:41 PM

#

and that it dropping relatively fast, 200UU/sec

thin stratus Dec 14, 2018, 8:41 PM

#

Yeah it also hits the floor at some point

#

📎 unknown.png

#

Rotation completely flips it's shizzle

#

Also not 100% sure where I lose that

#

CMC doesn't save rotation

#

I do though, cause mine can rotate compared to the character

winged badger Dec 14, 2018, 8:43 PM

#

how fast are your updates relative to the printouts?

#

because there are minor offsets everywhere

#

except Velocity Z

thin stratus Dec 14, 2018, 8:44 PM

#

The Print out is exactly before I apply the change

winged badger Dec 14, 2018, 8:45 PM

#

which makes me suspect your client isn't simulating that

#

and any jerkiness is due to server having to force new, very different speed on client each update

thin stratus Dec 14, 2018, 8:45 PM

#

Hm, the client doesn't have to simulate though

#

The data above is from a Client that controls its own movement

#

Which means it passes InputVelocity, InputRotationVector ClientLocation and flags etc.

winged badger Dec 14, 2018, 8:46 PM

#

still, your velocity Z is the exact same, every entry down to 6th decimal

thin stratus Dec 14, 2018, 8:46 PM

#

ClientLocation is the result of the clients move

winged badger Dec 14, 2018, 8:47 PM

#

and only velocity Z

thin stratus Dec 14, 2018, 8:47 PM

#

Hm

#

Thing is, idk why, otherwise I wouldn't bang my head against it

#

// Owning Client and Server
if (PawnOwner->Role > ROLE_SimulatedProxy)
{
    const bool bIsClient = (PawnOwner->Role == ROLE_AutonomousProxy && (IsNetMode(NM_Client)));
    if (bIsClient)
    {
        ClientUpdatePositionAfterServerUpdate();
    }
    // Client and Server
    if (PawnOwner->IsLocallyControlled())
    {
        // Check if we want to jump
        CheckJumpInput(DeltaTime);

        // @TODO: Scoped?
        // All Movement Modes use Input for Acceleration
        InputAcceleration = GetAccelerationFromInputVector(InputVector);
        AnalogInputModifier = GetAnalogInputModifier();

        // Server
        if (PawnOwner->Role == ROLE_Authority)
        {
            PerformMovement(DeltaTime);
        }
        // Client
        else if (bIsClient) 
        {
            ReplicateMoveToServer(DeltaTime, InputAcceleration, RotationInputVector);
        }
    }// Server Ticking for Remote Client
    else if (PawnOwner->GetRemoteRole() == ROLE_AutonomousProxy)
    {
        // @TODO: Smooth Movement for ListenServer
    }
}
// Simulating Clients only
else if(PawnOwner->Role == ROLE_SimulatedProxy)
{
    // @TODO: Simulate Tick
}

#

These parts are implemented

#

PerformMovement for the Server and ReplicateMovetoServer for the Client

#

The other two TODOs aren't relevant yet

winged badger Dec 14, 2018, 8:51 PM

#

that looks sane

#

can it tick before BeginPlay?

thin stratus Dec 14, 2018, 8:51 PM

#

No

#

If it would only be an initial error, then the client correction would fix it after the first time

#

But even after a correction it goes offsync again

winged badger Dec 14, 2018, 8:54 PM

#

odds are it would get worse if server had enough load not to be able to pull 60 FPS

thin stratus Dec 14, 2018, 8:54 PM

#

I don't expect anyone to know the issue at that point haha

#

DeltaTime should compensate for that though

#

Even if it only runs on 30 frames

#

It's the same code that the CMC uses

#

Just in addition with a Rotation passed over

winged badger Dec 14, 2018, 8:56 PM

#

hmmm

thin stratus Dec 14, 2018, 8:56 PM

#

Well and the Pawn being able to hover, but the hover is turned off atm

#

So it only has gravity

winged badger Dec 14, 2018, 8:56 PM

#

CMC doesn't replicate velocity to wning client

#

which would account for Z velocity not having discrepancies

opal dock Dec 14, 2018, 8:58 PM

#

I would like to make an online system with 5 different characters, but would you suggest a video tutorial for me

winged badger Dec 14, 2018, 8:58 PM

#

i heard only terrible stuff about Virtus, never looked at it though

#

the part of the CMC where server accepts the clients location info if within tolerance

#

do you still have that in @thin stratus

#

and did you expand it for rotators if you do?

thin stratus Dec 14, 2018, 9:01 PM

#

It only checks for Location error

#

Means if the rotation causes the location to go offsync, it wouldn't clearly show

#

(so I get why you ask)

#

📎 unknown.png

#

That's any entry (sadly not so well formatted, takes too much time)

#

That happend without any gravity or hover acceleration enabled

#

Only thing happend is that I actively drove against a ramp

#

And that's far after that

#

The Vel for example has the 0.21 and 0.22 in flipflop the whole time

#

Cause well it never corrected the client

#

Acceleration (linear) and RotVector (angular) seem to be correct

winged badger Dec 14, 2018, 9:10 PM

#

out of ideas, for now 😦

thin stratus Dec 14, 2018, 9:10 PM

#

:P All good

#

It's probably something stupid

winged badger Dec 14, 2018, 9:10 PM

#

because its almost always something stupid

thin stratus Dec 14, 2018, 9:11 PM

#

📎 unknown.png

#

One thing is

#

The Location X always has the same offset

#

So that basically changes properly and keeps the initial offset

#

Which for now is fine, cause that will never cause an issue

#

The rotation though has a changing offset

#

The YAW value doesn't change the same on Server and client

#

at least i think so

#

Actually, barely different

#

(╯°□°）╯︵ ┻━┻

#

All of them have like tiny little different numbers

#

Wait a second

#

Why is the sign of my Angular Velocity wrong

#

🤔

ember needle Dec 14, 2018, 9:18 PM

#

this doesn’t look like a float issue though

thin stratus Dec 14, 2018, 9:18 PM

#

Ah, it might be cause of the -180 and 180 thing

#

With most things I instantly have an idea what could be wrong, but not here.
The initial rotation is already not the same (-179.xxxx to 179).
That causes the PID controller to have a different error and the Angular Velocity that results from that is opposite (-)

#

Should I maybe force one initial replication so they start with the same numbers?
If I'm unlucky even setting 179.999802 to a variable will result in a differnet number xD

#

Ah well enough spamming. It's something for another day.

ember needle Dec 14, 2018, 9:22 PM

#

eheh

#

sometimes sleep gives the answer.

#

i’m trying to understand the differences between detach from controller pending destroy and unposses. Anyone has good resources for this?

lethal oracle Dec 14, 2018, 9:32 PM

#

Any tips on setting up movement for a ski-lift (cart/train thingy)? Tried a few quick ones: Sequencer animation and "regular" lerping..choppy as hell when playing as client (shakes the view like a maracas..). Testing 2 players on dedicated server. The only one providing smooth movement to clients so far is the InterpToMC, although I need more control over initial accel, etc. What I would like to know however, is why is InterpToMC giving a smoother, networked experience, than a simple, custom setup with lerping between points?

thin stratus Dec 14, 2018, 9:33 PM

#

@ember needle Doubt there are any resources

#

In most cases you are fine with Unpossess

#

If you really want to know what they do, read the source code

lethal oracle Dec 14, 2018, 9:38 PM

#

void APawn::DetachFromControllerPendingDestroy()
{
if ( Controller != nullptr && Controller->GetPawn() == this )
{
Controller->PawnPendingDestroy(this);
if (Controller != nullptr)
{
Controller->UnPossess();
Controller = nullptr;
}
}
}

ember needle Dec 14, 2018, 9:43 PM

#

ok so it’s only if pawn is pending destroy

#

thank you, i’ll be good with unpossess indeed

lethal oracle Dec 14, 2018, 9:50 PM

#

Yeah, seems like it's generally called when you need the pawn to be removed from the world, entirely (EndPlay, OutsideWorldBounds etc) 👌

ocean dust Dec 14, 2018, 10:32 PM

#

Do I need to open a session before ServerTravel <MapName> works?

#

I switched all of my GameModes over to Seamless Travel and am now calling Execute Console Command("ServerTravel <MyMapNameHere>") and it's still not working in a launched build (not PIE)

thin stratus Dec 14, 2018, 10:34 PM

#

Check your logs

#

Doubt you need a session for it

ocean dust Dec 14, 2018, 10:38 PM

#

Ah! I had an invalid TransitionMap in the .ini file. Didn't show in the Project Settings panel, but found it in the .ini itself

#

Not sure how that happened, but should be fixed

thin stratus Dec 14, 2018, 10:48 PM

#

👍

lethal oracle Dec 14, 2018, 10:51 PM

#

Ah, ofc. Playing a sequencer via multicast so it sim'd on client was smooth and nice. A few corrections during the "trip" though, which makes for a few stutters..

jagged garden Dec 14, 2018, 11:16 PM

#

damn @high current nice job on the game jam

high current Dec 14, 2018, 11:16 PM

#

@jagged garden thanks

#

Couldn't have done it without the help from you guys 😛

cedar finch Dec 15, 2018, 12:48 AM

#

I've asked this before but thought I had it figured out. Now I realized it's not exactly working. So my game is a Listen Server so the Server is an actual player and then clients connect. My issue is I want to hide my owning players name widget from himself but still let everyone else see it. I've tried running the logic after event begin play as well as in Event Possessed but it either works for client or works for server. I can't make them both work. The following works for client but not for server. https://i.gyazo.com/f5ef9ea27c7ac4c64d7107e57f3f61df.png

#

But if i put that inside Event Possessed it does work for server but replicated to client so the client can't see the servers name either, and the client doesn't run the logic to hide their widget because Event Possessed is server only.

#

Basically I'm asking how to not replicate my logic and how to allow the server player and client to both run said logic?

cedar finch Dec 15, 2018, 2:06 AM

#

Ok so I changed it up and call an RPC inside my Gamemode right after I spawn and possess my pawn. This RPC checks if the game is a dedicated server then sets the visibility of the owning players Name Widget. It works perfect for dedicated servers but I can't make it work right for listen servers. https://i.gyazo.com/416b50f16d7a15cc2e8c21b65808d972.png

#

I even tried using player controller 0 thinking maybe it would work. https://i.gyazo.com/64e3627a089c325c0cba4e6ea19c16e2.png

#

Note the delay is merely for testing purposes. It allows me to see both screens before the logic runs. What is happening is the server's widget is set to hidden, but the client see's the servers disapear as well as their own widget dissapears

#

https://i.gyazo.com/687fc960aaf24a2ebe4ade0d2ca553fe.gif

#

Due to my resizing of my windows to make them fit the names look a bit off. But you can see how they both dissapear on the clients screen on the right.

jagged garden Dec 15, 2018, 3:24 AM

#

@cedar finch do IsServer

#

it works for both dedicated and listen

cedar finch Dec 15, 2018, 6:31 AM

#

@jagged garden when I use IsServer It works for the client but not for the server. https://i.gyazo.com/d9ba6cf125ff990ece6cb60a19f7eddf.png

#

And if I do anything from the True branch then It replicates to the clients. 😦 I can't figure out how to make the Listen server player's name hidden only to himself.

wary cedar Dec 15, 2018, 9:58 AM

#

What will happen if I create an object on the server (that should be replicated to the clients), and then immediately call an RPC on this object?
Will the RPC wait until the object created and then be executed on the clients or will it be skipped in the case it come to the client before the replication data?

cedar finch Dec 15, 2018, 10:12 AM

#

Ok so I can get my playername to hide for the owning player if I use a key bind and then call an event in the widget itself. https://i.gyazo.com/4163094e6b0bf910ca6faddbc69a1b44.png

#

https://i.gyazo.com/ffde818a4a350fc0e10fe3050e912191.png

#

But I don't want to have to press a button. I just want it to happen everytime you spawn the pawn. But if I put that logic above inside BeginPlay or Event Tick it doesn't work right, things replicate

#

Well I know this isn't the most ellegant or proper way to do it but I stuck it inside the movement logic and it works perfect. If anyone can tell me another event that isn't replicated that would work at the beginning of the pawn's life where I could put this logic I'd be curious to know. https://i.gyazo.com/48ac1ccbf457c8fd13d6f6cc499e57be.png

drifting plank Dec 15, 2018, 11:04 AM

#

Try using GetNetMode or GetRole

#

It returns the type of processus (no network, client, listen or dedicated server) and if you are an autonomous or a simulated actor

#

You can put the logic in the OnPossess event

#

Possessed*

bitter oriole Dec 15, 2018, 1:37 PM

#

So I'm spawning a static mesh on the client-side in C++. Not replicated, purely client stuff. I keep getting warnings from FNetGUIDCache::SupportsObject saying the object is not supported

#

Which is kind of the point - no networking at all.

#

How can I silence these ?

#

I've looked here https://answers.unrealengine.com/questions/140212/fnetguidcachesupportsobject-not-supported.html but I fear it might trigger more stuff I don't want

prime axle Dec 15, 2018, 1:49 PM

#

could somebody give me the pseudo code behind respawning your players in a multiplayer game?

#

C++ btw

calm plaza Dec 15, 2018, 5:29 PM

#

So, I'm trying to make this Ouija board interactable. Each of 4 players can place their hands on it and collectively move it around. Currently, I'm using axis input from mouse to drive and impulse on the planchet. Works ok for server player but client input never replicates. Thoughts on using axis input for replication or other creative way to move this planchet with mouse input? Thanks!

📎 ouija.jpg

twin juniper Dec 15, 2018, 6:57 PM

#

if i call an event that's in Game Instance from client, is that event ran on client or server?

torn canyon Dec 15, 2018, 8:06 PM

#

It will be on server I think

twin juniper Dec 15, 2018, 8:07 PM

#

so client-side stuff should i do where

#

i would like to know a persistent client side class

#

that doesnt fire beginplay when a map is loaded

torn canyon Dec 15, 2018, 8:09 PM

#

Playercontroller / game state / player state are availlable to clients

twin juniper Dec 15, 2018, 8:11 PM

#

gamestate and playerstate run beginplay on map open

torn canyon Dec 15, 2018, 8:11 PM

#

Have anybody ever encountered the following problem ? To do a run on server method on a replicated actor on client side.

📎 unknown.png

twin juniper Dec 15, 2018, 8:13 PM

#

ok if I have a GameInstance (because thats only class i know is persistent between levels), how can i make events that dont interfere between server and client?

#

could this work?

📎 unknown.png

#

nope, it doesnt work

meager spade Dec 15, 2018, 10:01 PM

#

GameInstance is local only

#

No one else, including the server can access anyone else GameInstance

hexed cairn Dec 15, 2018, 10:13 PM

#

does anyone know how to spawn a nonlocal PlayerController in a net session?

#

I would like for clients to have drop in/drop out options even after joining a session while in the lobby

broken heart Dec 15, 2018, 10:20 PM

#

As a general rule of thumb is it ok if my game doesn't work properly on a non=dedicated server if I plan on always using a dedicated server?

twin vault Dec 15, 2018, 10:24 PM

#

sure

meager spade Dec 15, 2018, 10:29 PM

#

why do you need a another PlayerController for?

#

you should be able to handle that with the current PC

#

set them to spectating

#

when not in the game

hexed cairn Dec 15, 2018, 10:30 PM

#

@meager spade I have (or want to have, not sure honestly) multiple players to be able to join from one client, a la Rocket League

#

are you saying every client should just join with 4 PCs, and just have the inactive ones set to spectating?

meager spade Dec 15, 2018, 10:34 PM

#

every client has 4 PC's?

hexed cairn Dec 15, 2018, 10:34 PM

#

no. I'm just wondering if it's possible for PlayerControllers to drop in and out in the lobby

#

upon seeking sessions, a client has a number of PCs = to the number of active human players

meager spade Dec 15, 2018, 10:35 PM

#

only the server will have more than 1 player controller

#

not client

#

client will only have one player controller

hexed cairn Dec 15, 2018, 10:35 PM

#

what about a game like Rocket League, with local multiplayer available on a netsession?

meager spade Dec 15, 2018, 10:36 PM

#

thats handled probably via ListenServer

#

not sure, but on local one client will be the server

#

thats what ListenServer is

#

unless they spool up a dedicated server instance

#

and connect to that

#

cederic might know more about it

#

but i know with more than 1 PC per player will be a lot of logistical issues

hexed cairn Dec 15, 2018, 10:39 PM

#

what kind of issues should I be worried about? drop in/drop out is optional, but sending multiple players to netsessions is a must for me

#

is this cedric_exi you speak of? would it be cool to @ him?

meager spade Dec 15, 2018, 10:41 PM

#

all im saying is i dont think you want to handle it with multiple player controllers

#

and yes it is, but its on you to @ him lol

hexed cairn Dec 15, 2018, 10:43 PM

#

ok. @pale turtle can you chime in on this? looking to make a game where multiple players on one client machine can join a listen server. also interested in spawning nonlocal PCs after a client is already connected

#

@thin stratus rather

cedar finch Dec 15, 2018, 10:57 PM

#

Anyone know how to make a screen space widget not resize automatically?

#

https://i.gyazo.com/71ab2f4611c6dfb1db6c8896ee97bd2a.gif

twin vault Dec 15, 2018, 11:15 PM

#

its not resizing 🤔

cedar finch Dec 15, 2018, 11:19 PM

#

Oh... lol well darn. I feel stupid. Ok how can I make it stay above the players head? I tried resizing inside my event tick and it looks better. How do most games do it? Like Call fo duty, Fortnite, PUBG, etc. https://i.gyazo.com/ad7649d5451aa7a390da6422247a7231.png

#

https://i.gyazo.com/f60919640ae0375505f90af281372783.gif

#

This looks pretty decent my opinion lol. IDK if I should change it https://i.gyazo.com/5ca32685c0453e56b8127d1725dd0a18.png

copper portal Dec 15, 2018, 11:22 PM

#

how can I show my lobby widget with all the server information when I press a button ex ESC?

cedar finch Dec 15, 2018, 11:24 PM

#

@copper portal Do you have an event for that key? If so just create the widget and add it to the viewport. Is it just for the 1 person or you want everyone to see that widget?

copper portal Dec 15, 2018, 11:24 PM

#

I dont have anything yet

#

I want the person that pressed the key to see it

#

creating the widget is easy but getting all the information is the hard part

#

its from another level

#

and gamemode

#

and pc

#

so yeah

cedar finch Dec 15, 2018, 11:26 PM

#

So your wanting a widget that has Stats and stuff from every player from previous games. Kinda like in PUBG or COD where you can check your stats in the lobby?

copper portal Dec 15, 2018, 11:26 PM

#

naw

#

it has player list, chat, couple buttons based on if ur host or not, map name, server name, gamemode and other stuff

#

so I need to transfer that from levels

cedar finch Dec 15, 2018, 11:31 PM

#

Hmmm. So I'm not sure if this works 100% or if this is what your wanting. But I followed Unreals multiplayer tutorials and created a Lobby that had all that info you mentioned and then from there the game would start. When the game was over (everyone died) I just opened back up the Lobby map and everyone was back in the lobby. I still haven't tested it on two machines but I believe it works.

copper portal Dec 15, 2018, 11:31 PM

#

I have the return to lobby

#

but in game, I want the person to be able to see the lobby widget

cedar finch Dec 15, 2018, 11:32 PM

#

Ah! Ok so you go from Lobby -->> to Game and inside the game you want to be able to "pause" the game and see all the settings for the match?

copper portal Dec 15, 2018, 11:32 PM

#

yeah

cedar finch Dec 15, 2018, 11:32 PM

#

Oh ok gotcha. Sorry

#

Let me think a sec. So you have the widget ready right?

#

just no logic in it yet

copper portal Dec 15, 2018, 11:33 PM

#

no im starting from nothing

cedar finch Dec 15, 2018, 11:36 PM

#

I actually want the same thing now that I think about it. Wanna make it together? I can PM you.

copper portal Dec 15, 2018, 11:36 PM

#

ok

spare glade Dec 15, 2018, 11:50 PM

#

How would i go About Starting a Backend Service Based on the Already Existing Online Subsystem. as it interfaces The connection to the backend, there must be a good way to build a backend intended for it 🤔 , Is there a place for documentation on this?

I currently have gamesparks which is nice and all but wanting to start my own backend

twin vault Dec 15, 2018, 11:51 PM

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@cedar finch if youre resizing every frame, check the IsVolatile box

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If true prevents the widget or its child's geometry or layout information from being cached.

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im not umg expert but i think you should check this if you update every frame

calm plaza Dec 16, 2018, 1:44 AM

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SMART PEOPLE, and ideas as to get input axis values from client to server? trying to take mouse/stick input to drive variables and physics. HELP!

meager spade Dec 16, 2018, 2:08 AM

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mark them replicated and send to the server?

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or just set them on the server

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using a RPC

calm plaza Dec 16, 2018, 3:30 AM

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input axis values from the client are apparently not visible from the server. I'm trying to find a work around. trying to drive force input on an actor via the input axis value from mouse/controller.

thin stratus Dec 16, 2018, 8:25 AM

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@calm plaza ServerRPC

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That's your only way

twin juniper Dec 16, 2018, 8:51 AM

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So in GameInstance, this will run individually for every player? Because i dont want server to set these variables for clients

📎 unknown.png

thin stratus Dec 16, 2018, 9:33 AM

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@twin juniper Yes

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The server will also do this. GameInstance exist per instance of the game (hence the name)

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Also, you sure the Application ID in your screenshot should be openly visible?

twin juniper Dec 16, 2018, 9:43 AM

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oh

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time to regenerate the app id

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oh wait. no one can do anything if they dont have the client secret

twin juniper Dec 16, 2018, 10:19 AM

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and thanks @thin stratus

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and if i want to have a replicated variable in game instance (for example number of players in game), how can i achieve it

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have a multicast event that sets the num of players?

thin stratus Dec 16, 2018, 11:21 AM

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GameInstance is not replicated

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You can't replicate variables there

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@twin juniper

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Neither can you do RPCs in that

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Number of Players would belong into the GameState

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And technically, the length of the PlayerArray is already giving you that

twin juniper Dec 16, 2018, 11:26 AM

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i have this in GameMode now, could this work? i need the player count to be in gameinstance

📎 unknown.png

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or should i do a multicast event and run this part off that

brave solar Dec 16, 2018, 12:43 PM

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what is the "component replicates" tag for? I'm trying to replicate character scale and it only works if I check that box on my mesh component, but doing so messes up my movement replication. I don't understand what it does exactly

thin stratus Dec 16, 2018, 2:22 PM

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@brave solar It allows the component to replicate

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Similar to an actor

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Actor drives that thougj

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@twin juniper GameMode only exists on the Server. So what you are doing there would only execute on the server

twin juniper Dec 16, 2018, 2:23 PM

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aw

brave solar Dec 16, 2018, 2:23 PM

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why would it cause my character to stutter?

twin juniper Dec 16, 2018, 2:24 PM

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maybe i could set player number in all player controllers from game mode (or get player num from game mode in playercontroller), and then from there it sets player num individually for their own game instance?

thin stratus Dec 16, 2018, 2:35 PM

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@twin juniper Just get the PlayerArray from the GameState and get the length of it

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@brave solar No idea, if you only want to change scale do it with a repnotify vector variable

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No need to replicate the mesh component

brave solar Dec 16, 2018, 2:37 PM

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alright thanks

jagged goblet Dec 16, 2018, 3:17 PM

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Anyone here know of a guide on just replicating velocity from char movement component? I don't want to use addmovementinput for example as it doesn't work great for my game

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and using basic rpc's results in choppy movement

full bane Dec 16, 2018, 3:26 PM

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simulate on the client, the server should already automatically adjust location if your simulation is off by too much.

jagged goblet Dec 16, 2018, 3:40 PM

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velocity isn't replicated tho is the issue

full bane Dec 16, 2018, 3:42 PM

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then replicate it yourself

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and then simulate based on that

jagged goblet Dec 16, 2018, 3:42 PM

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er I see what you mean tho it'll make server one choppy and game prone to cheating no?

full bane Dec 16, 2018, 3:43 PM

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no to both

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server simualtes all things anyway, and if the client moves too far away from the server version, server will update location of the player

jagged goblet Dec 16, 2018, 3:44 PM

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right ive already simulated on client and having server correct the client is what is causing

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the choppy movement

full bane Dec 16, 2018, 3:44 PM

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there is a console command to visualize whenever the server updates client locations

jagged goblet Dec 16, 2018, 3:44 PM

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because there is no prediction etc.

full bane Dec 16, 2018, 3:44 PM

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then you are not accurate enough

jagged goblet Dec 16, 2018, 3:45 PM

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I will update velocity both on client and server results in choppy movement with high ping

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or even 30-50ms ping

full bane Dec 16, 2018, 3:49 PM

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if server and client simualte with the same accel levels, only edge cases would need to be corrected

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like high velocity impulses

calm plaza Dec 16, 2018, 3:50 PM

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@thin stratus so, is there any way that you know if to get the axis values from client to server in order to replicate? Just want to move an object with the mouse and have all players moving it simultaneously.

thin stratus Dec 16, 2018, 3:50 PM

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As said, ServerRPC

calm plaza Dec 16, 2018, 3:51 PM

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Right. But I can’t get the values visible to the server. Always comes up as zero.

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(When playing as client)

thin stratus Dec 16, 2018, 3:51 PM

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Well then you probably do something wrong :P

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There isn't much to do: ServerRPC, not reliable, float parameter.

calm plaza Dec 16, 2018, 3:51 PM

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Works perfectly as listen server.

thin stratus Dec 16, 2018, 3:52 PM

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All I can say is that you do something wrong. I can't see your code right now

jagged goblet Dec 16, 2018, 3:54 PM

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Denny, what im doing is setting velocity on the client then rpc to server and set the velocity there as well

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this works with 0 ping but not with 30+ ping

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not without stutters

thin stratus Dec 16, 2018, 3:56 PM

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If you still use the CMC, you should be able to set the Velocity without caring about anything else

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Cause in the end, the CMC uses the Velocity to move the RootComponent (the capsule)

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Actually, I think if you really just change the velocity, the cmc will correct you 🤔

jagged goblet Dec 16, 2018, 3:57 PM

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well setting velocity alone won't even replicate

thin stratus Dec 16, 2018, 3:58 PM

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Of course not. Replication in the CMC is an RPC

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Client tells the Server it's InputAcceleration and where it ended up (Location)

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Server uses the InputAcceleration, does the move itself and checks if the Location is the same as the one from the client

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If not you get corrected

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So velocity gets calculated on both ends

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And is then used to perform the move

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If you adjust velocity like that, it could very much be that the Client modifies a different move than the server

jagged goblet Dec 16, 2018, 4:00 PM

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so what if we want custom acceleration?

thin stratus Dec 16, 2018, 4:00 PM

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Well, the CMC kinda requires you to work with the InputVector stuff

jagged goblet Dec 16, 2018, 4:00 PM

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you can't just update velocity to server after doing your own calculation?

thin stratus Dec 16, 2018, 4:00 PM

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If you can't use that, you have to write your own component

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No I doubt you can

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Cause the Client never sends the Velocity to the Server. Neither does it send the resulting Location from your velocity to it

full bane Dec 16, 2018, 4:01 PM

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then you need the same accel oon both client and server

thin stratus Dec 16, 2018, 4:01 PM

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So they will always be offsync

twin juniper Dec 16, 2018, 4:01 PM

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Oh so variables in gamestate are replicated?

thin stratus Dec 16, 2018, 4:01 PM

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The Velocity is the result of InputAcceleration and the different force vectors

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It's only used to perform the move at the end of the frame

jagged goblet Dec 16, 2018, 4:02 PM

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well I am sending the velocity to the server as it changes

thin stratus Dec 16, 2018, 4:02 PM

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So what happens is that the Client sets Velocity locally to 1000,0,0. Sends the Server also to set it to 1000,0,0.
But the Server performs the move based on the InputAcceleration past

jagged goblet Dec 16, 2018, 4:02 PM

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hm

thin stratus Dec 16, 2018, 4:03 PM

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I can imagine that going wrong

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Also the RPC that causes the ServerMove

calm plaza Dec 16, 2018, 4:03 PM

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input.

📎 ipnut_ais.png

thin stratus Dec 16, 2018, 4:03 PM

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Doesn't have to be lined up with your RPC to change the velocity

calm plaza Dec 16, 2018, 4:03 PM

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adding force

📎 move_planchet.png

jagged goblet Dec 16, 2018, 4:03 PM

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https://forums.epicgames.com/udk/udk-development/udk-programming-and-unrealscript/295060-how-to-replicate-velocity-instead-of-acceleration

Epic Games Forums

Game programming using the Unreal Development Kit.

full bane Dec 16, 2018, 4:03 PM

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yes, using inputs is the best way to do it

thin stratus Dec 16, 2018, 4:04 PM

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Means if you change Velocity in Frame 1. And you send the RPC which the server receives in Frame 10.
Then it can also be that the ServerMove that got send in Frame 1 already ended up in frame 5 on the Server.

full bane Dec 16, 2018, 4:04 PM

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if you need better prediction, you can buffer moves

thin stratus Dec 16, 2018, 4:04 PM

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@calm plaza Don't mark RPCs reliable if you call them on tick

jagged goblet Dec 16, 2018, 4:05 PM

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would that guide get me anywhere, it's still basically the same code correct?

thin stratus Dec 16, 2018, 4:05 PM

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@twin juniper Yes? How about your learn the framework first, before diving into it ;)?

twin juniper Dec 16, 2018, 4:05 PM

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Well I'm learning now

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Now I know game instance is for each player and there you can get variables from gamstate

calm plaza Dec 16, 2018, 4:06 PM

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@thin stratus I'll give that a try.

thin stratus Dec 16, 2018, 4:06 PM

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Read my compendium please @twin juniper

twin juniper Dec 16, 2018, 4:06 PM

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And I guess that only server can set the variables in game state

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Oh link?

thin stratus Dec 16, 2018, 4:06 PM

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You are asking questions that are already explained

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Pinned to the channel

twin juniper Dec 16, 2018, 4:06 PM

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K thanks

thin stratus Dec 16, 2018, 4:07 PM

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@jagged goblet You can try that

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But that would require you to either use your own MovementComp

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Or change source

jagged goblet Dec 16, 2018, 4:08 PM

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I am using a child of CMC already

thin stratus Dec 16, 2018, 4:08 PM

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I also don't fully get why you need to set velocity directly

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Velocity is equal to Acceleration * DeltaTime

full bane Dec 16, 2018, 4:09 PM

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he might want to make an arcadey platformer

thin stratus Dec 16, 2018, 4:09 PM

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So if you need a specific Velocity, you could math it out

full bane Dec 16, 2018, 4:10 PM

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but you could just use super high accel values

thin stratus Dec 16, 2018, 4:10 PM

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Each frame, Acceleration * DeltaTime is added to Velocity

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Until Velocity.Length reaches MaxSpeed

jagged goblet Dec 16, 2018, 4:10 PM

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you mean I should be setting acceleration instead?

thin stratus Dec 16, 2018, 4:10 PM

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If you put Acceleration high enough, you can reach MaxSpeed pretty quickly

full bane Dec 16, 2018, 4:10 PM

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is there actually a reason you can't just use the movementInput stuff that is already in place?

jagged goblet Dec 16, 2018, 4:11 PM

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well it's a space game I want to have custom accel

thin stratus Dec 16, 2018, 4:12 PM

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And?

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What does custom mean here?

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You can change how much Acceleration the CMC allows etc.

full bane Dec 16, 2018, 4:15 PM

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and why would you want a cmc for a space game?

jagged goblet Dec 16, 2018, 4:16 PM

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well I was wanting to take advantage of the networking code on it

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also you can only set "Max acceleration" on CMC right?

thin stratus Dec 16, 2018, 4:18 PM

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@full bane Only the CMC has proper network replication :P

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@jagged goblet Yeah, but Input Acceleration is basically that

full bane Dec 16, 2018, 4:18 PM

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yeah, but he bypasses most of it with the custom code

calm plaza Dec 16, 2018, 4:18 PM

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making the RPC's unreliable doesnt seem to be making a difference. ugh.

thin stratus Dec 16, 2018, 4:18 PM

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They should still not be reliable

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https://puu.sh/CizI8/ff575be468.png

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You can't call RPCs on non owned Actors

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HitActor is probably not owned by the Player who wants to move it

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The RPC will be dropped

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You need to RPC in a Player owned Actor, such as the PlayerController, PlayerState, Character, Pawn

calm plaza Dec 16, 2018, 4:20 PM

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interesting. ill give it a go. thanks!

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(good eye)

jagged goblet Dec 16, 2018, 4:25 PM

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cedric for example my game will have custom accel rates for each axis

calm plaza Dec 16, 2018, 4:37 PM

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ITS WORKING!!!!!

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cedric, id hug you if i could.

thin stratus Dec 16, 2018, 4:54 PM

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@jagged goblet Then scale the axisinput?

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I mean, I really don't see the issue here

twin juniper Dec 16, 2018, 5:19 PM

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Heya, I'm using blueprints to work with networking, and I'm not entirely sure how much of my gameplay I should be doing serverside, the general idea I have is that things such as linetraces for lets say aiming, or requesting I try to upgrade a building would be serverside, but I'm noticing that that means that most things except visuals are serverside, is this the correct way of doing things or am I misinterpreting how networking should be done?

humble zealot Dec 16, 2018, 5:25 PM

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Could anyone help me with door replication please

jagged garden Dec 16, 2018, 5:30 PM

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@twin juniper Generally for a multiplayer game you want basically nothing done on the client that could affect the gameplay

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unless you are doing something like me where the game is co-op and there really isnt an issue with cheating

twin juniper Dec 16, 2018, 6:01 PM

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Right, well its mostly co-op for now but if design suddenly decides competitive is a good idea I'll want to be on the safe side of things for now haha

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thanks!

calm plaza Dec 16, 2018, 7:13 PM

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@humble zealot Replicating open and closing doors?

humble zealot Dec 16, 2018, 7:15 PM

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yeah @calm plaza

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its really starting to annoy me that its not working properly

past totem Dec 16, 2018, 9:58 PM

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How do I set the level of the server without repackaging?

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Like, via the shortcut or something

humble zealot Dec 16, 2018, 10:24 PM

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server default map in project settings?

📎 32b737e2ffca7b6f4e6ccbaee9a5fd2d.png

jagged garden Dec 16, 2018, 10:25 PM

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@past totem open <levelname>?listen

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in the console

past totem Dec 16, 2018, 10:25 PM

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@jagged garden yea no need for ?listen

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and it's not only name, need path

jagged garden Dec 16, 2018, 10:26 PM

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name should work

past totem Dec 16, 2018, 10:26 PM

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@humble zealot u didnt read what I wrote

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thonk

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well anyways my issue was that I didnt build the level so it didnt package for some reason

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lol

jagged garden Dec 16, 2018, 10:26 PM

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oh lol

hexed cairn Dec 16, 2018, 10:31 PM

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@thin stratus do you have input on my ? from yesterday? where should a sequential PlayerController be created in a multiplayer game for a 2nd, 3rd or 4th player on a client machine?

how does the player controller get assigned to nonlocal control input? this was yesterday at 4:13pm.

hazy herald Dec 16, 2018, 11:39 PM

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anyone know how to set variables inside a database from ue4 with vaRest, i know how to get them just not set them
please help

jade gazelle Dec 17, 2018, 1:41 AM

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What is the best way to address a noticeable lag between the server equipping a static mesh to a player and it replicating down to the client? Should I add an owning client RPC that runs simultaneously and equips the item visual on the client side to avoid the lag?

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That’s how I solved the problem so far and it seems to work fine, but not sure if there is a better way

jade gazelle Dec 17, 2018, 2:16 AM

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I just tested with 2 clients and the delay is only on the initial client which seems very weird to me. If I equip a weapon on client 1, client 2 sees the change instantly but client 1 has a 1 second or so lag

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Before the mesh gets added

meager spade Dec 17, 2018, 3:23 AM

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    {
        ServerGrantAbilities();
        return;
    }```

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thats legit right?

dusty sleet Dec 17, 2018, 3:58 AM

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is there a way when launching a dedicated server from the command line, to set a variable in the game mode?

grand kestrel Dec 17, 2018, 6:43 AM

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I just really want to bitch about the fact I don't want to call Super::GetLifetimeReplicatedProps() and I want to replicate the owner but I can't because its private.. (don't need a solution)

old hamlet Dec 17, 2018, 9:36 AM

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hello , i'm running into this problem and i hope someone can help me , when i try to package my game , it says unknown error , and i have online supsystem Steam enabled , but when i disable it the Game Packages Okay But it Doesn't Run okay

plain flume Dec 17, 2018, 9:39 AM

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Hi! I am trying to replicate painting. Basically with every tick we run Update function. Adding instances works without multiplayer. However, I want to replicate drawing to clients also. I created OnRep Transform array that will run OnRep_AddStrokeAndJoint. Idea was to go through array when new instance is added and update drawing to client. However, client is not updated and server doesn't seem to update drawing correctly.

📎 Drawing.png

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Any idea how should I even replicate this instanced static mesh thingy? Average there are maybe 300-400 instances in drawing in this project

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*per drawing

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Ah sorry, Client is drawing too, of course

📎 Drawing.png

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but both seem to miss quite few strokes, even if I seemingly go through whole array

thin stratus Dec 17, 2018, 9:57 AM

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Where are you even using that boolean?

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You set it to true

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Where are you checking it?

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And where are you setting it to false?

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In addition, you are always just adding to the array

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So you kinda already know what the new mesh to spawn is

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The last element

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So the only thing you'd need to do is check the length of the current meshes

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And the length of the replicated array

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And then add the difference

plain flume Dec 17, 2018, 10:04 AM

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Aah, that boolean was not used in this scenario. I once tried that if we are looping array, On_Rep function would not run while doing it, but the results were exactly same. Just a second, i'm gonna process what you just wrote

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hmm, So I should get number of the Instance count and lenght of currentStrokeTransforms. How would I go about adding the missing differences

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I guess something like this maybe

📎 hmm.png

thin stratus Dec 17, 2018, 11:33 AM

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@plain flume If one array is .e.g 8 and the other 10, then you have 2 missing instances

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So you go from 7 to 9 (index) and add them

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for(int32 i = CurrentNumOfMeshes; i < ReplicatedArrayLength; i++)
{
    // ADD
}

plain flume Dec 17, 2018, 11:34 AM

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Aah that is what i'm trying to do in that logic

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aah

thin stratus Dec 17, 2018, 11:34 AM

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Actually without the minus 1

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Not sure if OnRep can call while another OnRep is calling

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So you should technically be safe without any locks

plain flume Dec 17, 2018, 11:35 AM

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And I found an errors in my code. Now the system fully replicates to client and server and both sees the paintings as should. But oh my god there is log when drawing bigger pictures.

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*lag

thin stratus Dec 17, 2018, 11:36 AM

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Yeah it might be worth not sending every update

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But rather reduce it to once every second or so

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And then sending a bulk

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You can always have some sort of Buffer Array that you add new stuff in

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And every x seconds you move the difference over to the OnRep array

plain flume Dec 17, 2018, 11:37 AM

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Yes. This is getting interesting

supple musk Dec 17, 2018, 3:26 PM

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Hey guys,
I choose my mesh in the construction script based on a random value, so server and client can have different meshes ( and i don't want that ). How would you go about replicating what goes on in Construction Script ?

maiden nymph Dec 17, 2018, 4:32 PM

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small question for an upcoming gamejam : I want a multiplayer game (2 players) in a ship. The first one controls the ship, the second one controls a turret of the ship. what is the easies? Have 2 different pawns created (one being the character with the ship as a mesh, and the character movement component, the other one being invisible) or the same pawn, with branching in the input functions, which I would both attach to a third actor (the ship)
Thanks !

meager spade Dec 17, 2018, 5:13 PM

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the controller will control the ship

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your ship will be a pawn

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you possess the ship and control the ship

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the person controlling the turrent would be a pawn attached to the ship

chrome bay Dec 17, 2018, 5:47 PM

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Y'all

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There's a pretty serious bug with RepNotify functions and USTRUCTS. I'm flagging Epic for support on it, but there is a known workaround. Posting here for visibility:

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https://answers.unrealengine.com/questions/858571/serious-issue-with-repnotify-and-struct-upropertys.html

thin stratus Dec 17, 2018, 5:51 PM

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@chrome bay I doubt a lot of people even use the Previous value

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Or know about it

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At least by what I've seen during the last years

chrome bay Dec 17, 2018, 5:51 PM

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Yeah probably right, I think that's why it hasn't been flagged up until now

thin stratus Dec 17, 2018, 5:52 PM

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How dare you trying to use a feature!

chrome bay Dec 17, 2018, 5:52 PM

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IKR!

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I have lost a lot of hair and some of my lifespan trying to find out what this was today

elfin garnet Dec 17, 2018, 6:09 PM

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If I have a reference to a remote PlayerState stored locally and that player disconnects, does that reference become nullptr? or does it stay valid?

chrome bay Dec 17, 2018, 6:18 PM

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It could still be "destroyed" in the actor-sense elsewhere, but GC won't fully destroy it if the reference to it is a UPROPERTY

#

IIRC player states are given a 300 second lifespan by default when a player disconnects

thin stratus Dec 17, 2018, 6:20 PM

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Yop, they are marked inActive iirc

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So you can "OnOverrideWith" them to restore score etc.

elfin garnet Dec 17, 2018, 6:21 PM

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sweet! thanks yo!!

maiden nymph Dec 17, 2018, 7:14 PM

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@meager spade that was my plan 😃 is there a way to detect that a controller is the second to be used; and use a special pawn for it?

meager spade Dec 17, 2018, 7:18 PM

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hmm not really, you would want to just assign what the controller is doing in GameMode, if there is a ship pawn already, then make the second one a turret

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if there is no ship pawn, just assign that controller the ship, the second one will be a turret

lethal depot Dec 17, 2018, 9:35 PM

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what is the proper way to match player controllers and player states on server? 🤔

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I think I want to get the player state from the player controllers

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oh it's in AController 🤦

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was looking for it in APlayerController

vital steeple Dec 18, 2018, 1:04 AM

#

is there a way to have a dedicated server load a different game instance?

fossil spoke Dec 18, 2018, 1:10 AM

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No

#

The GameInstance is an intrinsic class to the entire process

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Why would you need to have a Dedi Server change its GameInstance?

#

What are you trying to achieve?

#

There is always a better way.

vital steeple Dec 18, 2018, 2:08 AM

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Ok! I am using uworks and it runs a bunch of stuff in the game instance. I can find a work around or ask the uworks folks about it. I was mostly just curious because it loads so early in the engine I figured it would be a useful thing to learn

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I just need a place to load the save game that I store user settings in, and game instance seemed like a good place to do that

#

How do you guys load your user settings save games?

severe widget Dec 18, 2018, 3:10 AM

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I tend to just use UGameUserSettings and it loads from config.

vital steeple Dec 18, 2018, 3:21 AM

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Hrm I thought the standard was to use a save game for stuff like sensitivity and audio volume.

#

I thought ugameusersettings was for default graphics settings etc

unique thunder Dec 18, 2018, 3:35 AM

#

📎 unknown.png

#

Is this all I need to do to use OnlineSubSystem Null?

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(Instead of Steam)

fleet sluice Dec 18, 2018, 6:54 AM

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@vital steeple The stuff I put in the UW-GameInstance BP doesn't "have to" be there. It was simply convenient. For all it matters, you can register your server in the level BP. UWorks is independent in that sense.

vital steeple Dec 18, 2018, 6:57 AM

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Oh hey! Rad! Thanks for being so proactive Vlad

#

I figured I was just curious. I can probably find another solution that works. Maybe in the server game mode or something

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I think game mode gets reloaded every time the server changes map but that's ok. A few seconds of downtime for server visibility during refreshes is probably not end of the world

#

Unless there's a more stable place to run the logic...

fleet sluice Dec 18, 2018, 8:14 AM

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Yes, the GameMode does get reloaded on every map change. Since we're talking about dedicated servers, I think they should register/unregister themselves only once, in the GameInstance. Then you can call the other functions to change various bits of information about it (i.e. SetGameTags("MatchEnded")).

#

The best UX you can design for a player is to have some low-level communication with the server before they actually try to connect (after browsing, use the ISteamNetworking interface to "ask" the server stuff, authenticate the player etc.). Therefore it would be kind of redundant to have servers constantly register/unregister themselves (if you put that logic in the GameMode) since you can script them to reply with whatever you want to the users who are "pending connection"

thin stratus Dec 18, 2018, 8:17 AM

#

In C++ there is actually a function you can override for that

#

But as always, neither the function nor the class are exposed to BPs

#

https://api.unrealengine.com/INT/API/Runtime/Engine/GameFramework/AGameSession/RegisterServer/index.html

AGameSession::RegisterServer

Allow a dedicated server a chance to register itself with an online service

#

@fleet sluice @vital steeple

fleet sluice Dec 18, 2018, 8:51 AM

#

Yea, I came across that while digging through OSSteam a year ago

#

I vaguely remember it was responsible (or related) to an issue I encountered

prime axle Dec 18, 2018, 9:30 AM

#

Is anyone familiar with overriding the InitNewPlayer() method from AGameModeBase? I'm trying to call the Super:: on it from a custom GameMode derived from GameMode (who in turn derives from AGameModeBase), But GameMode doesn't have the class InitNewPlayer() overriden, so I'm trying to call AGameModeBase::InitNewPLayer() as a substitute to the Super:: call, but then it gives me an error that "InitNewPlayer() is not a member of AGameModeBase, any direction to the solution would be appreciated.

thin stratus Dec 18, 2018, 9:38 AM

#

You should still be able to call super

#

Even if 2000 classes in between don't have it overridden

prime axle Dec 18, 2018, 9:40 AM

#

the InitNewPlayer() method in AGameModeBase is protected. That shouldn't affect it, right?

thin stratus Dec 18, 2018, 9:40 AM

#

No, protected allows it to be used in child classes

prime axle Dec 18, 2018, 9:43 AM

#

class CustomGameMode : public AGameMode
{
GENERATED_BODY()
public:
virtual FString InitNewPlayer((APlayerController* NewPlayerController, const FUniqueNetIdRepl& UniqueId, const FString& Options, const FString& Portal = TEXT("")) override;
}

FString CustomGameMode::InitNewPLayer(APlayerController* NewPlayerController, const FUniqueNetIdRepl& UniqueId, const FString& Options, const FString& Portal)
{
Super::InitNewPlayer(NewPLayerController,UniqueId,Options,Portal);
}

#

That should work, right??

chrome bay Dec 18, 2018, 9:45 AM

#

Assuming FString is the return type of InitNewPlayer and InitNewPlayer isn't const, yes

prime axle Dec 18, 2018, 9:45 AM

#

📎 unknown.png

#

Declaration in AGameModeBase.h

chrome bay Dec 18, 2018, 9:45 AM

#

Looks right!

prime axle Dec 18, 2018, 9:46 AM

#

And yet....

📎 unknown.png

chrome bay Dec 18, 2018, 9:46 AM

#

You've got a capital 'L'

#

in the cpp file

#

InitNewPLayer

prime axle Dec 18, 2018, 9:46 AM

#

just a discord typo, my bad. not in the original cpp

chrome bay Dec 18, 2018, 9:47 AM

#

And here too NewPLayerController

#

You've just posted a screenshot of the error list and the capital is there too

thin stratus Dec 18, 2018, 9:47 AM

#

xD

fleet sluice Dec 18, 2018, 9:48 AM

#

Also you should just compile and post that error, from the "Output" window and generally ignore the "Error" window (I always do)

#

"Error" often complains about stuff that isn't going to produce compilation errors

chrome bay Dec 18, 2018, 9:49 AM

#

yeah disable that shizzzzzzz

prime axle Dec 18, 2018, 9:49 AM

#

Oh god; Can you believe i've been stuck on this for like an hour

chrome bay Dec 18, 2018, 9:49 AM

#

Lol.. we've all been there 😄

prime axle Dec 18, 2018, 9:49 AM

#

🤦

chrome bay Dec 18, 2018, 9:50 AM

#

Mixing 'I' and 'l' is my favourite one

prime axle Dec 18, 2018, 9:50 AM

#

Sometimes you just need a 2nd pair of eyes. Haha
Quite embarresed, but thank you nonetheless! 😄

chrome bay Dec 18, 2018, 9:51 AM

#

np's 😄

thin stratus Dec 18, 2018, 9:52 AM

#

https://api.unrealengine.com/INT/API/Runtime/Engine/Engine/ULocalPlayer/PlayerAdded/index.html

ULocalPlayer::PlayerAdded

Called at creation time for internal setup

#

Not calling. GG

#

Let's compile for DebugGame then -.-

chrome bay Dec 18, 2018, 9:55 AM

#

Oo isn't that called really early on? Like game instance init time?

thin stratus Dec 18, 2018, 9:56 AM

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Yeah idk. I do my player login in the LocalPlayer class

#

I have the strange feeling UE4 reset my LocalPlayer class

thin stratus Dec 18, 2018, 10:14 AM

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Ah well, I shouldn't tick "offlineBuild" in the project settings if I want to connect to stuff, right?

#

੻∉捀慬獳㨢∉䄮瑵敨瑮捩瑡潩剮獥潰獮≥ਬ∉畡桴潔敫≮ऺ愢㕤愴ㅢⴲ㥣㈳㐭扣ⴸ㥡搰愭慢愰㤰搳搶∷ਬ∉楤灳慬乹浡≥ऺ䌢摥楲彣塥≩ਬ∉敮偷慬敹≲ऺ慦獬ⱥऊ爢煥敵瑳摉㨢∉㔱㔴㈱㐷㐵たⰢऊ產敳䥲≤ऺ㔢㑡㉥ち昳㕦㡢〳〵㈱㠴㠵∲紊

#

Also, nice log message -.-

mighty schooner Dec 18, 2018, 11:35 AM

#

Is there a way to get stat net data to display on UMG? I'm specifically looking for the Max value of Out Rate (bytes). I've looked into NetDriver.cpp and used GetNetDriver()->OutBytes from my custom player controller but the result doesnt seem quite right.

vital steeple Dec 18, 2018, 4:08 PM

#

@thin stratus @fleet sluice thanks guys! I can leave it in game instance as well. Also not afraid of c++. Been moving stuff over to c++ when necessary. Always good to learn more about the framework of ue4. I can always just test if dedicated server then load the save game for user settings

#

Side question. Is it possible to setup custom variables in the game user settings ini and then pull during runtime? I wouldn't mind dumping things like audio levels and sensitivity in there. It would be nice to have single solutions for stuff

thin stratus Dec 18, 2018, 4:10 PM

#

That's what you usually do, yes

#

Create your own child class of it

#

And then put your own stuff into it

vital steeple Dec 18, 2018, 4:11 PM

#

Oh... Cool. Somehow I haven't run across that. I will poke around for tutorials on it

#

Thank you guys!

thin stratus Dec 18, 2018, 4:12 PM

#

UHLGameUserSettings::UHLGameUserSettings(const FObjectInitializer& ObjectInitializer)
    : Super(ObjectInitializer)
{
    SetToDefaults();
}

UHLGameUserSettings* UHLGameUserSettings::GetHLGameUserSettings()
{
    return Cast<UHLGameUserSettings>(GEngine->GetGameUserSettings());
}

void UHLGameUserSettings::SetToDefaults()
{
    bInvertYAxis = bTempInvertYAxis = false;

    Super::SetToDefaults();
}

void UHLGameUserSettings::ApplySettings(bool bCheckForCommandLineOverrides)
{
    bInvertYAxis = bTempInvertYAxis;

    Super::ApplySettings(bCheckForCommandLineOverrides);
}

void UHLGameUserSettings::ResetToCurrentSettings()
{
    bTempInvertYAxis = bInvertYAxis;

    Super::ResetToCurrentSettings();
}

#

Something like that

vital steeple Dec 18, 2018, 4:13 PM

#

Super close to testing my game publicly then remembered I don't have some essential settings exposed. Which turned into this chain of questions

#

Do I need to create it in c++?

thin stratus Dec 18, 2018, 4:13 PM

#

Yes

#

And if there is no setting in the project settings

#

then you need to do this in the DefaultEngine.ini

#

[/Script/Engine.Engine]
GameUserSettingsClassName=/Script/Hoverloop.HLGameUserSettings

#

Can't recall if there was a setting

#

Hoverloop is the game name/projectname

#

UCLASS(config = GameUserSettings, configdonotcheckdefaults, BlueprintType)
class HOVERLOOP_API UHLGameUserSettings : public UGameUserSettings
{
    GENERATED_UCLASS_BODY()
    
    /// VARIABLES ///

private:

    /** Temp versions, in case the user resets their choices. */
    UPROPERTY(Transient)
        bool bTempInvertYAxis;

    /** Actual version which is saved to the config. */
    UPROPERTY(config)
        bool bInvertYAxis;


    /// FUNCTIONS ///
    
public:

    UFUNCTION(BlueprintCallable, Category = Settings)
        static UHLGameUserSettings* GetHLGameUserSettings();

    UFUNCTION(BlueprintCallable, Category = "HL|CameraSettings")
        void SetInvertYAxis(bool bNewInvertYAxis) {
        bTempInvertYAxis = bNewInvertYAxis;
    }
    UFUNCTION(BlueprintCallable, BlueprintPure, Category = "HL|CameraSettings")
        bool GetInvertYAxis() const { return bInvertYAxis; }

    /************************************************************************/
    /* UGameUserSettins Interface                                           */
    /************************************************************************/

    virtual void SetToDefaults() override;
    virtual void ApplySettings(bool bCheckForCommandLineOverrides) override;
    virtual void ResetToCurrentSettings() override;
};

#

Header would be something like this

#

g2g to the store

vital steeple Dec 18, 2018, 4:18 PM

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Perfect! Thank you sir!

vital steeple Dec 18, 2018, 5:48 PM

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if i create a custom one do i have to add entries for all the other graphics settings that the default one has? in other words am i completely overriding the previous gameusersettings that stores graphics settings etc?

magic helm Dec 18, 2018, 5:56 PM

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If it's inherited from Game User Settings, then there's no need.

thin stratus Dec 18, 2018, 6:03 PM

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Graphic Settings remain

#

Just make sure to call Super::

rocky badger Dec 18, 2018, 8:55 PM

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I have a widget that is created in the level BP using a cpp function but when I try and 'remove the widget from viewport' in c++, it only removes it from the server

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does anyone know how to go about this? I apologize for the poor explanation

sharp pagoda Dec 18, 2018, 9:32 PM

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@rocky badger That's some poor design, you rarely, if ever, want to use the level BP. UI widgets should be managed by your hud class 99% of the time.

rocky badger Dec 18, 2018, 9:54 PM

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@sharp pagoda ah alright thank you. I'll see what that does for it

rare cloud Dec 18, 2018, 10:43 PM

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I recently discovered ATLAS (https://store.steampowered.com/app/834910/ATLAS/) did someone have some informations about the network technology behind this game ?

Steam

ATLAS

From the creators of ARK: Survival Evolved comes ATLAS - a massively multiplayer first-and-third-person fantasy pirate adventure. ATLAS will host up to 40,000 players exploring the same Globe simultaneously, with an unprecedented scale of cooperation and conflict! Stake your ...

Release Date

Dec 19, 2018

▶ Play video

#

it can normally handle 40k players

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I don't think it use SpatialOS, so I think about Photon or a custom technology

fossil spoke Dec 18, 2018, 11:08 PM

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Mmmm i think they are extending the truth there a little. Id say its heavily instanced. You wont ever see 40k players.

grand kestrel Dec 18, 2018, 11:30 PM

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Its not spatial and the solution is hacky, you will definitely feel it as a player

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If there are too many players in one "grid" they can't enter and have to wait

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World is split into these grids

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With a server handling a grid

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I'd expect hitching and vanishing players where grid lines meet

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@rare cloud

#

Remind me to let you know later, my team will definitely look into it but we're expecting to shrug or roll our eyes when we realize what they did 😆

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Their coding on ark was really poor, that's why

small temple Dec 19, 2018, 1:12 AM

#

any replication experts here who can help me decipher this arcane assertion? LogWindows: Error: Assertion failed: CmdIndexIterator->ChangelistIterator.ChangedIndex - OldChangedIndex <= ArrayChangedCount [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\RepLayout.cpp] [Line: 1062]

#

could it happen because i'm trying to replicate some big-ish structs?

small temple Dec 19, 2018, 1:30 AM

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yep, looks like that was it

meager spade Dec 19, 2018, 4:51 AM

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how can i check if player is ListenServer

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HasAuthority && IsLocallyControlled ?

grand kestrel Dec 19, 2018, 4:56 AM

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GetNetMode() == NM_ListenServer

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@meager spade

meager spade Dec 19, 2018, 4:57 AM

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thx

next falcon Dec 19, 2018, 9:42 AM

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Does anyone know a way to load level instances in multiplayer who are also replicated?
what i tried:

Load level instance On server. Result: not replicated clients can't see.
Load level instance on server and seperatly on client too. Result: clients get disconnected

what else could i try ?

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also i tried it with Ramas Victory plugin "add streaming levels" but still not working

twin vault Dec 19, 2018, 10:29 AM

#

hey, still having that problem i posted here other day, if anyone has an idea...

trying to find a session with those settings:

    OnlineSessionSettings.bShouldAdvertise = true;
    OnlineSessionSettings.bIsDedicated = false;
    OnlineSessionSettings.bUsesStats = true;
    OnlineSessionSettings.bAllowInvites = true;
    OnlineSessionSettings.bAllowJoinInProgress = true;
    OnlineSessionSettings.bAllowJoinViaPresence = true;
    OnlineSessionSettings.bAllowJoinViaPresenceFriendsOnly = false;
    OnlineSessionSettings.bAntiCheatProtected = false;
    OnlineSessionSettings.bIsLANMatch = false;
    OnlineSessionSettings.bUsesPresence = true;
    OnlineSessionSettings.NumPublicConnections = 5;

    search:
    SessionSearch->bIsLanQuery = false;
    SessionSearch->MaxSearchResults = 20;
    SessionSearch->QuerySettings.Set(SEARCH_PRESENCE, true, EOnlineComparisonOp::Equals);

on a packaged game, different computers, different accounts, my own APPID
Joining through presence and through invites works fine
but searching will return bWasSuccessful == true and 0 sessions on the array
Using steam

rare cloud Dec 19, 2018, 10:56 AM

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@fossil spoke @grand kestrel ok thanks 😄

light tiger Dec 19, 2018, 1:10 PM

#

Hi devs!
Very tricky question for you today 😋 !
Looking for safety solution for dedicated server.
There is a need to have a backup server running in the background to supply players with seamless travel to it when the main dedicated server crashes.
What might be a solution in this case?
I know, not trivial)

lethal depot Dec 19, 2018, 1:37 PM

#

if I call a NetMulticast RPC function on playerstate from server (game mode) it should be called on the clients as well, right?

#

and btw, if I print string in BP, it prints which server/client the message comes for if I use more client on same machine for debug
what is the way to do that in c++? 🤔

#

📎 unknown.png

#

talking about this client 2, client 1, server thing

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ok, so I start a game project with 3 players, and one of the controllers does not have player state on the local player controller, any idea why? 🤔

thin stratus Dec 19, 2018, 2:24 PM

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Most likely timing issue

lethal depot Dec 19, 2018, 2:29 PM

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I initialized my UI in playercontroller::beginplay, and it seems that the playerstate variable might or might not be initialized at that point

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all my problems are fixed for now, but the question still stands about logging in c++ like that ^

lean river Dec 19, 2018, 2:34 PM

#

Macro :)

lethal depot Dec 19, 2018, 2:39 PM

#

I guess this is what I need:

#

📎 unknown.png

small temple Dec 19, 2018, 3:41 PM

#

guys, did they change it so RepNotify functions now get called on the server?

winged badger Dec 19, 2018, 3:42 PM

#

it was always called on server

#

as well as on client if client sets the value locally

small temple Dec 19, 2018, 3:42 PM

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huh? i always had to call the OnRep function manually on the server

winged badger Dec 19, 2018, 3:42 PM

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c++ OnRep functions do not behave like that

#

but BP RepNotify does

small temple Dec 19, 2018, 3:43 PM

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wait, so BP OnRep functions are not called on the server, but CPP OnRep functions are?

winged badger Dec 19, 2018, 3:44 PM

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the other way around

small temple Dec 19, 2018, 3:44 PM

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yeah so in cpp you would have to call the OnRep function yourself?

winged badger Dec 19, 2018, 3:44 PM

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server side, yes

small temple Dec 19, 2018, 3:44 PM

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ok, but that's not what's happening for me right now

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maybe i have a rogue function call somewhere

#

oh, this is really weird

#

the OnRep function is being called on my server but not on my client

#

i suppose that's a different issue though

bitter oriole Dec 19, 2018, 3:50 PM

#

My advice : put logs in your methods that print the Role value, to confirm what happens.

small temple Dec 19, 2018, 3:50 PM

#

could it be that it's not being called on the client because the variables are already identical?

#

but yeah, that's right @bitter oriole

#

i think i just realized what's happening and it's just me being dumb

bitter oriole Dec 19, 2018, 3:53 PM

#

Usually the problem with most MP code

#

It's never simple

small temple Dec 19, 2018, 3:56 PM

#

do you guys know who has authority over a playerstate? is it always the server or is it the owning client?

lethal depot Dec 19, 2018, 3:56 PM

#

server

small temple Dec 19, 2018, 3:57 PM

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ah, yeah then i see what's happening

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and it's nothing special, everybody move along 😛

bitter oriole Dec 19, 2018, 4:06 PM

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The notions of authority and the different roles are fairly intricate

#

My favorite one is how an unpossessed remote pawn changes role

#

From "Autonomous" to "simulated"

#

Losing access to server RPC in the process

#

Fun stuff

severe nymph Dec 19, 2018, 6:39 PM

#

Anyone having issues with the listen server client not registering overlaps in 4.21.1 release branch. Clients are generating the event properly and the logic is firing and even has authority spawning an actor. The listen server client however does not perform the logic or spawn the actor

#

Which is really confusing to me because you would figure the server would need to register the overlap events to has authority spawn actors in the world

prime axle Dec 20, 2018, 11:37 AM

#

Just a sanity check -
When a player joins a server; both the client and server have a playercontroller associated with this player. But this player only has 1 PlayerState right?
So technically for every player there exists 2 playercontrollers (one on client, one on server) but they both share the same PlayerState,, riight?

bitter oriole Dec 20, 2018, 12:40 PM

#

Yes

#

Though PC only exists on the client if the client owns it

#

Its not replicated to other clients

#

For example a peer to peer game with two players has three instances of PC

#

The hosting PC doesn't need to exist on client

thin stratus Dec 20, 2018, 2:21 PM

#

No idea what you mean with "Share the same PlayerState"

#

Makes it sound like you have trouble understanding what it even means that there are 2+ instances of an actor.

prime axle Dec 20, 2018, 2:25 PM

#

Right so say you connect to a server , somewhere.
You'll have your game running with and on your screen you see your player, your player is a pawn and has a playercontroller.
The server in his turn creates the same pawn and controller on the server (withouth the visuals) Right?
Now do these 2 instances of player + controller share the same PlayerState?

If I were to call GetController on server and client; it'd return 2 different things. but if I were to then call ->PlayerState() on both of them, would it be the same?

#

So 2 PC exists, one on your client, one on the server

#

If I called PlayerState on either one, would they share the same one?

#

also @bitter oriole I don't quite understand that. If you have a peer to peer game running, wouldn't there be 4 instances of PC?
2 on Server for Player1 and Player 2
1 on Client1 for Player1
1 on Client2 for Player2
???

bitter oriole Dec 20, 2018, 2:28 PM

#

In UE4, you would have listen server (player that hosts) + client

#

You'd have two PCs on the listen server, and only one on the client

prime axle Dec 20, 2018, 2:28 PM

#

oh right. I'm thinking about Dedicated Servers though

#

So then there'd be 4, right?

bitter oriole Dec 20, 2018, 2:29 PM

#

My case was for a listen server

#

If you have 2 clients and a dedicated server, you have the situation you described

thin stratus Dec 20, 2018, 2:39 PM

#

📎 unknown.png

#

BLUE BORDER: Client 1 and Server
RED BORDER: Client 2 and Server
GREEN BORDER: Client 1, Client 2 and Server
BLUE UNDERLINE: Client 1 owns Actor
RED UNDERLINE: Client 2 owns Actor

prime axle Dec 20, 2018, 2:42 PM

#

So if I understand the image correctly,
You make it seem like Client1 and Dedicated server only use 1 PlayerController, which If i'm not mistaken isn't the case. They both have their own PlayerController. no?

thin stratus Dec 20, 2018, 2:42 PM

#

The image pretty clearly shows that both Client 1 and the Dedicated Server have an ainstance of PC_Client 1

#

Obviously that's not the exact same memory. That's impossible

prime axle Dec 20, 2018, 2:45 PM

#

right but they each have a different instance
do both also have a different instance of PlayerState or do they share it?

thin stratus Dec 20, 2018, 2:46 PM

#

They never "share"

#

Every player and the server always have their own instance

#

They are connected via a net id

#

PC_Client 1 on Client 1 and PC_Client 1 on Dedicated Server are two different instances

#

They just share whatever you marked as replicated in them

#

If you have 2 Clients and one DediServer

#

Each Client has two PlayerState instances

#

Their own and the one from the other client

#

And the Server has an instance of each

#

So basically if you throw them all into the same pot, you have 6 instances

prime axle Dec 20, 2018, 2:48 PM

#

And does the PlayerState also only "share" whatever I marked as replicated in them?

thin stratus Dec 20, 2018, 2:48 PM

#

Yes

prime axle Dec 20, 2018, 2:48 PM

#

Then what is the difference between PS and PC o_O

thin stratus Dec 20, 2018, 2:48 PM

#

PS exists on the other client too

#

PC only on Server and owning Client

#

Which is also visible in the image

prime axle Dec 20, 2018, 2:50 PM

#

I guess I was looking at it with the wrong thought process all along, thank you.

#

So basically the PlayerState only exists to hold stuff that you want "other players to know about"

thin stratus Dec 20, 2018, 2:51 PM

#

Correct

#

Everything private between Server and Client usually goes into the PC.

prime axle Dec 20, 2018, 2:51 PM

#

so if I wanted to say, display the health over players' heads, i'd hhave to put health in the playerstate

thin stratus Dec 20, 2018, 2:51 PM

#

Not directly

#

The Pawn also exists on everyone

#

At that point, due to the way objective programming is meant to work, the Pawn has to handle its own health

#

But things like Name, Ping, Score, Deaths, Kills, Assists etc.

#

Go into the PlayerState

prime axle Dec 20, 2018, 2:53 PM

#

i don't see the difference in variables like health and deaths and kills to be handled so differently.
If the pawn should be responsible for it's own health, why not be responsible for it's own deaths and kills?

thin stratus Dec 20, 2018, 2:54 PM

#

Cause the lifetime of the variable dies with the pawn

#

Health is only relevant as long as the pawn is alive

#

If it dies you could technically destroy the pawn actor

#

Kills on the other hand should persist if the pawn dies

#

You don't want them to reset to 0

prime axle Dec 20, 2018, 2:55 PM

#

oh right

#

Thanks for clearing it up man!

#

Appreciate everything from the explanation to the nice visuals 😄

thin stratus Dec 20, 2018, 2:56 PM

#

No biggie

elfin garnet Dec 20, 2018, 4:31 PM

#

If an actor is placed in the world, does it get an owning connection? I want to call a multicast RPC on an actor that i put in a level and got by reference and it isn't seeming to work... I've tried SetOwner with the local player controller and that didn't work either...

winged badger Dec 20, 2018, 5:02 PM

#

you don't need an owner to multicast

#

or an owning connection

jolly siren Dec 20, 2018, 5:14 PM

#

Can I run into issues when calling a client rpc on a replicated actor that was just spawned, where the rpc beats the actor replication?

// Spawn weapon on server
AGun* NewWeapon = GetWorld()->SpawnActor<AGun>(WeaponClass, SpawnInfo);
NewWeapon->ClientGivenTo(Instigator, bAutoEquip);

winged badger Dec 20, 2018, 5:15 PM

#

sure

#

RPCs don't wait for NetUpdate for the Actor

#

but looking at that signature, you can get away with replicating bAutoEquip

#

and handling client side on BeginPlay

#

Instigator Pawn reference is replicated by default

#

any replicated variables will be replicated along with instructions to spawn the actor

#

in same bunch

jolly siren Dec 20, 2018, 5:18 PM

#

clientside in BeginPlay? I can't rely on bAutoEquip in beginplay can I?

winged badger Dec 20, 2018, 5:18 PM

#

if its replicated, you can

jolly siren Dec 20, 2018, 5:18 PM

#

What? Are you sure?

winged badger Dec 20, 2018, 5:18 PM

#

pretty sure, yes

#

as long as its set before the replication is evaluated server side