#multiplayer | Unreal Source | Page 555

thin stratus Jul 12, 2020, 5:41 PM

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@violet frost

twin juniper Jul 12, 2020, 5:51 PM

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@thin stratus mind if you can check my problem too 🙂

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I am kinda frustrated how I failed at it again

obsidian imp Jul 12, 2020, 6:27 PM

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Does anyone have any insights as to why I'm getting some pretty severe client position adjustments when always returning false from FSavedMove_Character::CanCombineWith and playing with simulated latency? I'm having a hard time understanding how this makes sense.

tranquil yoke Jul 12, 2020, 6:36 PM

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Hey Guys Open Console Command will allow me to join a server running on Cloud Right ?

waxen socket Jul 12, 2020, 6:57 PM

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Hello. Can one pass variables from the client to a RunOnServer event and expect the value to make the journey?

limber gyro Jul 12, 2020, 7:11 PM

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i think so yes

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as long as u make that function reliable

waxen socket Jul 12, 2020, 7:11 PM

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Is that the only way to replicate a value from the client to the server?

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I'm trying to replicate an InputAxis value.

meager spade Jul 12, 2020, 7:12 PM

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don't use Reliable on tick

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or in Axis bindings (which also tick)

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you will fill your reliable buffer

waxen socket Jul 12, 2020, 7:13 PM

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I'm trying to avoid that, yeah.

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Is passing an axis value from the client to the server via a RunOnServer event parameter every so many milliseconds an efficient way to replicate rotation, or no?

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I'm trying to get rid of as many multicasts as possible while I try to make my ship tilt as it's flown up and down the screen.

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I think I need to run SetRelativeRotation multiple times per second on up to four pawns.

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And have their rotations match so that collisions look believable on each screen.

meager spade Jul 12, 2020, 8:11 PM

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rotation is replicated?

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or is this just a normal Pawn?

twin juniper Jul 12, 2020, 8:22 PM

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Hello, Can you suggest me a solution for mobile multiplayer game?

wicked brook Jul 12, 2020, 8:25 PM

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@twin juniper you may need to be more specific

twin juniper Jul 12, 2020, 8:27 PM

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@wicked brook Which paths do I need to follow for multiplayer matchmaking?

wicked brook Jul 12, 2020, 8:29 PM

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i mean what are you using?

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or you want to know what to use?

twin juniper Jul 12, 2020, 8:30 PM

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@wicked brook I want to know what to use and alternative options

wicked brook Jul 12, 2020, 8:32 PM

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just depends what you want and how much you want to pay. epic online services, playfab, gamelift, zeus.io, spatialos. Thats a few. You will have to google and see what else may be out there and if any would do what you need them to do

twin juniper Jul 12, 2020, 8:38 PM

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epic online services and gamelift - I tried it as it is not working stably right now but I was not successful or my knowledge is insufficient to use. not enough documents!
playfab - sdk version is very old and there are a lot of errors that haven't been successful for debug.
I will look again for spatialos sdk now.

I think there is no other choice.

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just depends what you want and how much you want to pay. epic online services, playfab, gamelift, zeus.io, spatialos. Thats a few. You will have to google and see what else may be out there and if any would do what you need them to do
@wicked brook thank you for the information.

waxen socket Jul 12, 2020, 9:01 PM

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@meager spade It inherits from Character.

tranquil yoke Jul 12, 2020, 9:03 PM

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Hey Guys i am running a dedicated server, I am using Open IpAdress to join the clients with server

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When client is joining the server i have to pass some information to the server about the client, like user name that client had selected before joining the server

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I am trying using Copy properties from player state, but it seems like it is not being called right now

wicked brook Jul 12, 2020, 9:06 PM

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@twin juniper i use gamelift extensively and it is very stable so im not sure what you mean

cursive mortar Jul 12, 2020, 9:07 PM

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@wicked brook do you know which servers are working best on GameLift? Between Epic and Steam?

wicked brook Jul 12, 2020, 9:08 PM

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i upload to aws server

cursive mortar Jul 12, 2020, 9:08 PM

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about multiplayer, which runs best on AWS?

wicked brook Jul 12, 2020, 9:09 PM

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yes

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i use gamelift and upload server build to aws server

cursive mortar Jul 12, 2020, 9:10 PM

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Do you have the game published on any of the platforms?

wicked brook Jul 12, 2020, 9:10 PM

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one was on steam a while back but currently none are published

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working on a new type of battle royale now as well as a vr sniper game. both with gamelift/aws

cursive mortar Jul 12, 2020, 9:12 PM

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Ok. Thanks for the info! 😄 Do you have any good tutorial on how to run on a game on Gamelift/AWS?

wicked brook Jul 12, 2020, 9:12 PM

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there is a plugin on marketplace that makes it super simple. or just all the gamelift docs are pretty extensive

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if you buy the plugin those guys have tons of tutorials and docs

cursive mortar Jul 12, 2020, 9:14 PM

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What is the name? 😄

twin juniper Jul 12, 2020, 9:14 PM

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Thank you for the information I will do some more research.

cursive mortar Jul 12, 2020, 9:16 PM

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@wicked brook Ok, I think I found it. It's the plugin on AWS. Thanks a lot for the info. I will research more.

tranquil yoke Jul 12, 2020, 9:18 PM

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Hey guys, what would be the proper way to join to a dedicated server ?

wicked brook Jul 12, 2020, 9:18 PM

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depends where it is hosted

tranquil yoke Jul 12, 2020, 9:19 PM

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On Aws

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I mean, does Open IP console command will work, i am just testing something out and using blueprints.

wicked brook Jul 12, 2020, 9:19 PM

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no

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you need to use gamelift local if you want to test locally

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or if you did not implement gamelift you can just build server and run locally with -log

tranquil yoke Jul 12, 2020, 9:20 PM

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yeah i am doing that

wicked brook Jul 12, 2020, 9:20 PM

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then in client/ editor use open level node with 127.0.0.1

tranquil yoke Jul 12, 2020, 9:21 PM

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okay

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I am using open console command, i think they are the same

wicked brook Jul 12, 2020, 9:22 PM

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i think you need to use open level node for server travel to work

tranquil yoke Jul 12, 2020, 9:23 PM

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I am able to join to the server problem is data is not being sent over, Before joining , i save some data inside the player state

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and i have copied the data on Copy Properties Event, to the new player state

wicked brook Jul 12, 2020, 9:23 PM

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are you using different playerpawns before and after?

tranquil yoke Jul 12, 2020, 9:23 PM

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but there is no log coming out of that Event

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yes pawns are differnt

wicked brook Jul 12, 2020, 9:24 PM

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thats why

tranquil yoke Jul 12, 2020, 9:24 PM

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no actually there are no pawns

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for both maps

wicked brook Jul 12, 2020, 9:24 PM

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when spawning a new pawn a new player state is created

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i think playerstate is attached to a pawn so if you have no pawns then maybe thats why also

tranquil yoke Jul 12, 2020, 9:26 PM

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First Map is kind of character selector and other is main pawn, i have done custom spawn logic for Spawning in main map, but for first map there is no Pawn. and i do not spawn one, but player state is being created. I guess, event is not being called, because of the pawn. Let me do one

wicked brook Jul 12, 2020, 9:27 PM

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yeah try spawn the same pawn in lobby that you want to have in server

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i ran into this a while back and it was because i was using different pawn from lobby to server

tranquil yoke Jul 12, 2020, 9:30 PM

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Nope not working

wicked brook Jul 12, 2020, 9:31 PM

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do you have the default pawn and playerstate selected properly in settings/ game mode?

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for each map

tranquil yoke Jul 12, 2020, 9:32 PM

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yup

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Player controller is different

wicked brook Jul 12, 2020, 9:34 PM

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that may be why

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i was wrong when i said pawn. its player controller

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📎 unknown.png

twin juniper Jul 12, 2020, 9:49 PM

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https://youtu.be/Ul0Gilv5wvY

Would it be realisitic to use something like this to drive movement/anim for players? I think it controls movement based on the anim data. So if you only replicated movement data from player alone and just sent it to the other clients, more efficient than CMC?

YouTube

Yoshiboy2

Phase-Functioned Neural Networks for Character Control

We present a real-time character control mechanism using a novel neural network architecture called a Phase-Functioned Neural Network. In this network structure, the weights are computed via a cyclic function which uses the phase as an input. Along with the phase, our system t...

▶ Play video

wicked brook Jul 12, 2020, 9:51 PM

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@twin juniper im not sure. I have never seen that sort of setup in multiplayer games. Only single player.

tranquil yoke Jul 12, 2020, 9:53 PM

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@wicked brook Did not worked

wicked brook Jul 12, 2020, 9:55 PM

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try save in the game mode and see if it goes across. Maybe you are not saving it correctly? i dont know what logic you are using. put print strings everywhere.

tranquil yoke Jul 12, 2020, 9:55 PM

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have put print string everywhere

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yeah save game is the last option

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copy properties event never gets called

wicked brook Jul 12, 2020, 9:56 PM

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do you have seamless travel enabled

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and a map set for transition map

tranquil yoke Jul 12, 2020, 9:57 PM

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seamless is enabled

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transition map is set to entry Map

wicked brook Jul 12, 2020, 9:58 PM

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i think you need a different map. just make a blank map call it transition and put it there

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you will need to rebuild server though

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also i think seamless travel dont work in editor i think you need to use client build if you not already

tranquil yoke Jul 12, 2020, 10:07 PM

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I am doing all of this.
This does seems to work man !! frustrating,

meager spade Jul 12, 2020, 10:13 PM

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you can't seamless travel in PIE

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just a heads up

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if that is what you are trying to do @tranquil yoke

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ah got beaten to it 😄

tranquil yoke Jul 12, 2020, 10:15 PM

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Not doing that.
I am using shortcuts of Ue4Editor and has given project path and arguments to that to run the instances of that project as server and clients

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this will work right ?

meager spade Jul 12, 2020, 10:16 PM

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sure

tranquil yoke Jul 12, 2020, 10:30 PM

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When i close the client, i see the logs which calls the copy Properties Event ?

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I dont understand, is this event called on Ending of session too ?

wicked brook Jul 12, 2020, 10:51 PM

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i think you need built project with proper targets for it to work

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running instance of editor wont work

tranquil yoke Jul 12, 2020, 10:57 PM

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okay, i will try that

wicked brook Jul 12, 2020, 10:58 PM

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also some stuff has this. make sure its checked

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📎 unknown.png

tranquil yoke Jul 12, 2020, 10:58 PM

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One question, Is it important to have a session running on Dedicated server in order to everything work ?

wicked brook Jul 12, 2020, 11:00 PM

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dont quote me but i dont think so

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i meant dont quote me on saying it isnt required 😄

tranquil yoke Jul 12, 2020, 11:02 PM

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😄

tranquil yoke Jul 12, 2020, 11:20 PM

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I have done my requirement using save game now.

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But i honestly wanted to do it via player state,

wicked brook Jul 12, 2020, 11:24 PM

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did you build client and server targets and try like that?

somber glade Jul 13, 2020, 2:06 AM

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What's the proper process for applying visual effects/color changes/etc to something in game for clients who join after that changed is already made? Normally if you have a blue cube and you want to make it red, you execute a multicast so that all connected clients run that code and change the color to red on their end. What kind of function should you be setting up for a client who joined after that happened, but still needs to see that?

wicked brook Jul 13, 2020, 2:20 AM

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as long as its on server and the proper thing set to replicate, then that should be all you need @somber glade

somber glade Jul 13, 2020, 2:22 AM

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it's a listen server. Specifically I'm looking at the following scenario: On begin play pawns play a propeller animation (montage). The host jumps into the level his animation starts for him, a client joins and the animation is started for the host and client, however the host's animation isn't started for the client because the client joined after that code ran on the host's pawn.

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when the client joins, it's showing that begin play runs on the server's pawn, but for some reason the montage isn't starting on the host from the client's view

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I'll have to see if there is something else blocking it

wicked brook Jul 13, 2020, 2:23 AM

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yeah im confused by that description lol

somber glade Jul 13, 2020, 2:24 AM

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On begin play a prop animation is called in a multicast so that everyone connected see's that montage. Host starts the map, his pawn starts the animation for him. The client joins, and the animation is started on the client's pawn so that the host and the client can both see it. But the host's pawn doesn't start the animation from the client's perspective.

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the host sees the animation on both pawns, the client only sees it on himself.

meager spade Jul 13, 2020, 2:26 AM

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should never use multicasts for that

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use RepNotify property

somber glade Jul 13, 2020, 2:28 AM

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There's no variable to be replicated. There is no anim blueprint. These pawns have no animation beyond a single prop montage.

meager spade Jul 13, 2020, 2:29 AM

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no anim bp yet your playing a montage?

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🐟

cedar finch Jul 13, 2020, 2:29 AM

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Is that a WhippyTrout?

meager spade Jul 13, 2020, 2:29 AM

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if you want it to be lol

somber glade Jul 13, 2020, 2:29 AM

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Yes with a play animation node. No point in setting up an AnimBP when only a single animation will ever be played on the pawn.

meager spade Jul 13, 2020, 2:30 AM

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why would the client see the animation

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if its already been played?

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well i am confused

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so gl, its 3:30 am lol

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i off to bed

somber glade Jul 13, 2020, 2:31 AM

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because the play animation node is called in a multicast off begin play?

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actually I see the issue right now.. I didn't make this pawn, i came into this part way through, they didn't set up the flow properly here.

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even though the client runs begin play on the server's copy of the pawn, the client can't call a multicast .

hoary lark Jul 13, 2020, 3:08 AM

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Is this pawn like a Wal-Mart greeter who waves his hand every time someone joins or something?

winged badger Jul 13, 2020, 3:15 AM

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@somber glade why would you ever multicast anything on BeginPlay?

somber glade Jul 13, 2020, 3:15 AM

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again, I didn't set this pawn up, I've removed it and it's working now

clear copper Jul 13, 2020, 3:30 AM

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Does anyone know how to use seamless travel for multiplayer? I open a listen level. Clients join. I have seamless travel enabled. I use Open Level. It kicks all clients from the server and only moves the host. What am I missing? Because every tutorial and doc i can find just says use open level with seamless travel ticked but it doesn't seem to be working

winged badger Jul 13, 2020, 3:44 AM

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ExecuteConsoleCommand(ServerTravel LevelName?listen)

clear copper Jul 13, 2020, 4:14 AM

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i don't think seamless travel works with servertravel

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from what i've read, it uses open level

violet frost Jul 13, 2020, 4:31 AM

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Has anyone got OnlineSubsytemSteam and AdvancedSessions working on UE 4.25.1?

thin stratus Jul 13, 2020, 5:16 AM

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@clear copper SeamlessTravel works with ServerTravel. I would even go as far as saying it only works with ServerTravel.

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@violet frost Did you try what I suggested you?

cursive mortar Jul 13, 2020, 6:43 AM

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Does anyone have any idea how to save progress on the server? What would be the steps to follow? I bet a login of some sort is required.

violet frost Jul 13, 2020, 6:49 AM

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@violet frost Did you try what I suggested you?
@thin stratus I did, didn't seem to do the trick

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I'm trying again with an older version

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Ue 4.22

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What do you make of this? LogModuleManager: Warning: ModuleManager: Module 'OnlineSubsystemSteam' not found - its StaticallyLinkedModuleInitializers function is null.

thin stratus Jul 13, 2020, 7:11 AM

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iirc, modules register with the manager via some static variable and that all sort of enters into the StaticallyLinkedModuleInitializers .
If it can't find that, then it will produce this error message.

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In addition, that message only comes up for monolithic builds.

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@violet frost Are you building a monolithic build?

violet frost Jul 13, 2020, 7:22 AM

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I don't believe so (not sure what a monolithic build)

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After trying with 4.22, packaged game does not crash anymore but steam functions (like getting player name) still isn't working

winged badger Jul 13, 2020, 8:55 AM

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just to make sure

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you do have steam client running and are logged into it @violet frost ?

violet frost Jul 13, 2020, 8:55 AM

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Yes

hollow sphinx Jul 13, 2020, 9:22 AM

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Hello everyone. Is there somebody who encountered such problem as I did? So my problem is that I cannot connect to my dedicated server when I have Steam enabled (on both of PC's) while I disable Steam everything is OK. If someone know how to fix this, please share the solution or give an advice how to solve it. I'm using UWorks plugin for SteamAPI. Thank you.

cursive mortar Jul 13, 2020, 9:32 AM

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Anyone can guide me on how to make make a login and data saving of players on server?
For login I was thinking at VaRest, but I am not sure about it.

rapid barn Jul 13, 2020, 10:45 AM

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hey, I just put up this question on stack exchange since I thought it was a bit too long for discord. Would appreciate if any of you guys could help me out: https://gamedev.stackexchange.com/questions/184323/ue4-blueprint-multiplayer-spawning-issue

Game Development Stack Exchange

UE4 Blueprint Multiplayer Spawning Issue

I'm attempting to copy/modify the MultiplayerShootout project's multiplayer functionality for my own project. I'm running into issues when Player 2 joins a running session though. Finding it very h...

waxen socket Jul 13, 2020, 12:20 PM

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Hello. I'm trying to make my ships in my co-op space shooter tilt as they fly up and down the screen. I was using multicasts to do this but have been informed that repnotifys are the way to go for state changes.

My problem now is that I can't seem to get the** InputAxis value from the client to the server** in order to apply the rotation OnRep_.

Any advice on how to replicate a rotation very similar to that seen in Platypus would be much appreciated.

https://youtu.be/xCi14KUbVi4?t=29

YouTube

zero007ist

Platypus 2 - Level 1

▶ Play video

grizzled stirrup Jul 13, 2020, 2:14 PM

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Should you use the generic Achievement interface when working with Steam rather than directly calling the Steam API functions like

const char* MyAchievement = TCHAR_TO_ANSI(*Challenge.ChallengeName);
SteamUserStats()->SetAchievement(MyAchievement);

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And instead call something like:

                    ULocalPlayer* LocalPlayer = Cast<ULocalPlayer>(Player);
                    if (LocalPlayer)
                    {
                        IOnlineSubsystem* OnlineSub = Online::GetSubsystem(GetWorld());
                        if (OnlineSub)
                        {
                            IOnlineIdentityPtr Identity = OnlineSub->GetIdentityInterface();
                            if (Identity.IsValid())
                            {
                                FUniqueNetIdRepl UserId = LocalPlayer->GetCachedUniqueNetId();

                                if (UserId.IsValid())
                                {

                                    IOnlineAchievementsPtr Achievements = OnlineSub->GetAchievementsInterface();
                                    if (Achievements.IsValid() && (!WriteObject.IsValid() || WriteObject->WriteState != EOnlineAsyncTaskState::InProgress))
                                    {
                                        WriteObject = MakeShareable(new FOnlineAchievementsWrite());
                                        WriteObject->SetFloatStat(*Id, Percent);

                                        FOnlineAchievementsWriteRef WriteObjectRef = WriteObject.ToSharedRef();
                                        Achievements->WriteAchievements(*UserId, WriteObjectRef);
                                    }
                                }
                            }
                        }
                    }

chrome bay Jul 13, 2020, 2:16 PM

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You should be able to just to Online::GetAchievementsInterface() to keep it simple

grizzled stirrup Jul 13, 2020, 2:16 PM

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Thanks that sounds much cleaner

chrome bay Jul 13, 2020, 2:18 PM

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But yeah you want to avoid calling steam stuff directly, since the interfaces (in theory) let the game code not care about what platform it's running on.

grizzled stirrup Jul 13, 2020, 2:18 PM

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Thanks I'll do my best to do that

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I have noticed some cases where I have to do steam stuff

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Like opening the overlay

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But that's to be expected

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I have most of the session stuff using the generic interfaces

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Not sure about the leaderboards though as there are specific inputs and callbacks from Steam

waxen socket Jul 13, 2020, 3:00 PM

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Is there an efficient way to replicate an InputAxis value from the client to the server many times per second?

placid sparrow Jul 13, 2020, 3:02 PM

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Curious, how safe are data tables in multiplayer from a cheating standpoint?
Think there's an option to only package on the server. I guess I could store any functions for returning the data in the gamemode to be safe?

winged badger Jul 13, 2020, 3:04 PM

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thats a death sentence to your network performance

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having to replicate static data

waxen socket Jul 13, 2020, 3:06 PM

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But it's not static, no? InputAxis will be changing almost every frame.

winged badger Jul 13, 2020, 3:08 PM

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that was for Sp00nFed

waxen socket Jul 13, 2020, 3:08 PM

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Oh, sorry. 😅

winged badger Jul 13, 2020, 3:08 PM

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your answer is unrealiable server RPC, provided the axis value changed, on a very short timer

waxen socket Jul 13, 2020, 3:09 PM

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Okay, that's how I had it setup but I thought maybe there was a better way with repnotifys and maybe "burst counters".

placid sparrow Jul 13, 2020, 3:09 PM

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Yeah, I'm not worried about performance. This isn't something that is called on regularly

hoary lark Jul 13, 2020, 3:10 PM

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Everything is 100% safe if the server has 100% authority and 0% safe if the server has 0% authority

waxen socket Jul 13, 2020, 3:15 PM

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Can I pass a value from the client to the server through a RunOnServer event?

chrome bay Jul 13, 2020, 3:20 PM

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It won't stop cheating anyway. Even if you replicate something, there's no garauntee the client won't manipulate the received data on their end.

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@waxen socket yep, you can send things that way

waxen socket Jul 13, 2020, 3:22 PM

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Thanks, Jambax. And do you have thoughts on replicating an InputAxis value? Do you think it's a use case for a burst counter maybe?

chrome bay Jul 13, 2020, 3:22 PM

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Doesn't make sense to rep an axis value IMO

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What's the goal?

waxen socket Jul 13, 2020, 3:22 PM

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I'll repost my question from above. Thanks for your time.

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Hello. I'm trying to make my ships in my co-op space shooter tilt as they fly up and down the screen. I was using multicasts to do this but have been informed that repnotifys are the way to go for state changes.

My problem now is that I can't seem to get the InputAxis value from the client to the server in order to apply the rotation OnRep_.

Any advice on how to replicate a rotation very similar to that seen in Platypus would be much appreciated.

https://youtu.be/xCi14KUbVi4?t=29

YouTube

zero007ist

Platypus 2 - Level 1

▶ Play video

chrome bay Jul 13, 2020, 3:23 PM

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Hmm, it looks as though the rotation is just inferred from the craft moving either up or down

waxen socket Jul 13, 2020, 3:24 PM

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Yes, but to know that the craft is moving, I need the InputAxis value, no?

chrome bay Jul 13, 2020, 3:26 PM

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If you're doing client-authority, I would just send XY position and XY velocity via unreliable RPC

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But you'd want to send it as infrequently as you can get away with and at a maximum rate.

waxen socket Jul 13, 2020, 3:27 PM

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Something like this?

📎 Screen_Shot_2020-07-13_at_12.27.10_PM.png

chrome bay Jul 13, 2020, 3:29 PM

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The multicast doesn't seem necessary there since the value is replicated

waxen socket Jul 13, 2020, 3:30 PM

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Okay, I think I understand.

chrome bay Jul 13, 2020, 3:30 PM

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If you're sticking to blueprint it's a lot harder tbh

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What I would do probs isn't feasible in BP

waxen socket Jul 13, 2020, 3:31 PM

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I understand C++ for Unreal to an extent. Maybe I could make use of it if you showed me? Is what you have in mind a lot better in your opinion? I'll need to be able to support four ships replicating their tilts at once.

chrome bay Jul 13, 2020, 3:32 PM

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tbh, if it's only four ships - then you can just use the engines replicated movement. Since server-auth is complicated and probs not needed I would just do client-auth.

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Setup:
-> Check 'Replicates Movement'.

Each Tick:
-> Update Position and Velocity
-> Each player sends position, velocity, rotation and input to the Server (unreliable, as low freq as you can get away with)
-> Override ReplicatedMovement condition to skip the owner so that local player doesn't keep snapping back to old position.
-> Between updates, the server can keep updating position/velocity/rotation etc. based on the last-received input (clients could do the same too I guess)

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You'll probably also need to interpolate the ships visual elements to the actual transform each tick too, as it'll look choppy as heck otherwise.

waxen socket Jul 13, 2020, 3:38 PM

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I've been trying to avoid Tick but I guess this is a valid use of it, eh?

chrome bay Jul 13, 2020, 3:38 PM

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yep, perfectly sensible to do movement with tick

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Driving it from input events directly is probably much less efficient anyway tbh

waxen socket Jul 13, 2020, 3:40 PM

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Okay, I'm gonna try to implement this. Do you mind if I at you tomorrow when I've finished if I have questions?

grizzled stirrup Jul 13, 2020, 3:46 PM

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It's very tempting to just run the Steam API function for achievements, works perfectly and is one line SteamUserStats()->SetAchievement(TCHAR_TO_ANSI(*Challenge.ChallengeID));

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Can't get the generic interface to work

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In theory if you only planned on releasing on PC and PS4, is it still viable to do something like:

if (OnSteam)
{
  SteamUserStats()->SetAchievement(TCHAR_TO_ANSI(*Challenge.ChallengeID));
}
else if (OnPS4)
{
  PS4UserStats()->SetAchievement(TCHAR_TO_ANSI(*Challenge.ChallengeID));
}

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I understand that this would create branches for online leaderboards and achievements which is all I need the custom calls for but it seems far more straightforward than the mountain of code that the generic interface requires for achievements and leaderboards specifically

waxen socket Jul 13, 2020, 4:09 PM

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Are these options not useful for replicating the rotation of pawns? Are they meant to help with some other problem?

📎 Screen_Shot_2020-07-13_at_1.08.05_PM.png

cursive mortar Jul 13, 2020, 4:57 PM

#

I am still trying to figure some stuff out:

#

what is best between Gamelift / Gamesparks?
how would it be best to save the player data on the server? Any tips or steps to follow?
I want to make a multiplayer game on a dedicated server.
If someone know anyhting about these topics, any info is welcome

twin juniper Jul 13, 2020, 5:17 PM

#

Hello, SpatialOS is there anyone using it for mobile?

waxen socket Jul 13, 2020, 5:17 PM

#

@chrome bay This is what I came up with based on your notes. It seems to work well besides the server being a little less smooth than the client. I think that may be due to the difference of their DeltaSeconds values. Also, when I set VertSpeed to SkipOwner, the client fails to rotate unless they're also the server.

Does this look like what you had in mind?

📎 Rotaplication.jpg

thin stratus Jul 13, 2020, 6:50 PM

#

That doesn't look like a good approach. DeltaTime with RInterp only really makes sense if you are using Tick. Right now your DeltaTime is a "fixed" 0.1 second.

#

And the RPC is also weird. BeginPlay calls on everyone, but you are handling it like it's only executing on the owning client

#

I mean, i guess ue4 takes care of dropping it for the wrong connections

waxen socket Jul 13, 2020, 6:56 PM

#

You mean using Tick to run RInterp? My DeltaSeconds float it being set by EventTick.

#

I see what you mean about the RPC though. It would run on each ship... It's just I can't think of any other way to get the InputAxis from the client to the server to calculate the rotation.

clear copper Jul 13, 2020, 7:27 PM

#

if I have a Lobby Player State, when I move everyone to the gameplay map that has a different default player state with servertravel and level streaming, do they keep their lobby player state or do they take the new Game Player State

limber gyro Jul 13, 2020, 7:28 PM

#

yo peeps, last time i came here with a question but didnt get a definitive answer

#

whats the proper way to handle random maps on start up with unreal?

#

is that suposed to be done with the backend or does unreal ahve a way to do that

#

i mean for the server

#

for example, you have a matchmaking system and everytime a new sessions gets dynamicly created it starts with a random map

tranquil yoke Jul 13, 2020, 7:40 PM

#

Hey guys , Some doubts about

#

GameLift

#

Do i have to use source Engine for this to work, if anyone has any tutorial on this, i would love to get the the link.

rose egret Jul 13, 2020, 7:44 PM

#

how do I use TMap.FindByHash ?
instead of replicating FName I am replicating its hash. I want to use it in the find function of TMap

#

    template<typename ComparableKey>
    FORCEINLINE const ValueType* FindByHash(uint32 KeyHash, const ComparableKey& Key) const

whats the ComparableKey here ?

limber gyro Jul 13, 2020, 8:10 PM

#

@tranquil yoke there are tuts for game lift on utube

#

search for flopperam

meager spade Jul 13, 2020, 8:11 PM

#

the name you want to compare

tranquil yoke Jul 13, 2020, 8:16 PM

#

@limber gyro yeahj just found that.

#

thanks

clear copper Jul 13, 2020, 9:39 PM

#

When using the AdvancedSessions Plugin, There's a node to get all of the player's Steam Friends. But lets say someone logs in or out after I've already gotten that list, how do I know that? Or do I have to just constantly refresh the list on tick?

crystal crag Jul 13, 2020, 9:45 PM

#

@cursive mortar I think how you save your data depends on what type of data you need to save and how you need the game to scale. There really are not great one-line responses to either of your questions.

The best thing would probably be look up slot-based game saves on the UE documentation site (I know they have some examples of some sort on there) and then if that doesn't look like it will fit your needs then maybe look up mysqlite game saves, which I don't think is on UE's web site, but there are definitely links indexed with google to help you with that approach.

#

Nothing is stopping you from developing a REST service and using structs in unreal to serialize and send the struct data as JSON to a web service to persist to a database either.

#

I'd start with the slot based game save data approach though and go from there

#

as for a dedicated server, I have yet to find anyone covering that. All of the examples seem to only cover a listen server approach. https://www.ue4community.wiki/Legacy/Dedicated_Server_Guide_(Windows_%26_Linux) shows you how to setup a dedicated server build

Dedicated_Server_Guide_(Windows_%26_Linux)

cursive mortar Jul 13, 2020, 9:49 PM

#

@crystal crag I want basically to save all the player data: level, money, items, location on map. I know how to do the standard "offline" data saving (the one with slots), but I wonder if that can be done on the server. I've read about running a MySqlite service or REST Api implementation, but I think that is a really tedious process. Thank you very much for the info! 😄 I have it noted and gonna research it more.

crystal crag Jul 13, 2020, 9:50 PM

#

I think, but I haven't tried this myself, that you would do the save slots on the server. The client would then just connect and have the save data replicate to it

cursive mortar Jul 13, 2020, 9:50 PM

#

For now I have a dedicated server on another PC, and it works, also joining via a DNS name. Gonna try to make maybe a Slot save on the server. I really have no idea how to best grasp this concept.

crystal crag Jul 13, 2020, 9:52 PM

#

I think on player disconnect or logout you would just save their data. Basically check that you are running with authority and if so, then do the save

#

if you are a client, then you wouldn't save anything. The client would just sign in, and then the server would know which game data to load for them

#

Saving game data is something I have been avoiding in my journey so far, so someone else might have better advice, but I am pretty confident that is a good overview

cursive mortar Jul 13, 2020, 9:53 PM

#

The only thing I have also to figure out is who logged in so that the save is restored. But found some solution with GameSpark. Not sure if GameLift is also working.

#

Thank you a lot! 😄 I almost thought my questions were forgotten here

crystal crag Jul 13, 2020, 9:55 PM

#

I've never used either of those. That is coming up soon for me on my current project though, so if I remember I will share what I have found. Also no worries hopefully I helped a little. It's frustrating when everyone ignores what you ask and pretend that they didn't see it.

cursive mortar Jul 13, 2020, 9:57 PM

#

@crystal crag Thank you a lot! 😄 I will also give it a try soon enough (this / next week).

frozen fog Jul 14, 2020, 12:41 AM

#

Hey guys! Apart from steam, what are other good services that allow implementing Listen Server multiplayer over the internet? Is Epic Online Services capable of that?

grizzled stirrup Jul 14, 2020, 12:45 AM

#

The generic interface for Leaderboards only seems to allow for a single entry on a Steam leaderboard (so you can't have score, kills, deaths etc. and only score)

#

In situations like this should you then directly call the steam API functions yourself?

ashen pebble Jul 14, 2020, 1:07 AM

#

Does anyone know how to make a local multiplayer system, where when a player presses a button, they will join the game?

crystal crag Jul 14, 2020, 1:32 AM

#

so over LAN @ashen pebble

#

?

ashen pebble Jul 14, 2020, 1:33 AM

#

@crystal crag Idk, just on an Xbox or something, like if you wanted to play with your sibblings

#

On one console

crystal crag Jul 14, 2020, 1:33 AM

#

I am not sure about console

#

sorry

ashen pebble Jul 14, 2020, 1:34 AM

#

That's okay

crystal crag Jul 14, 2020, 1:34 AM

#

Maybe there is an advertise lan option for those? I would think in practice the flow would be the same

#

https://www.udemy.com/course/unrealmultiplayer/

Udemy

Super Simple Online Game Development: Unreal Engine and C++

Use Unreal for Online Game Dev in C++. Tutorials Cover LAN, VPN, Steam & More. Epic Games Collaboration

#

That course doesn't talk about XBox, but it shows how to do it over PC and steam

#

maybe that would help you transfer over to XBox

somber glade Jul 14, 2020, 1:36 AM

#

@ashen pebble you're talking about split screen? or just drop in local coop?

ashen pebble Jul 14, 2020, 1:37 AM

#

I think local coop

somber glade Jul 14, 2020, 1:37 AM

#

So like smash brothers? all the players on a single screen?

ashen pebble Jul 14, 2020, 1:37 AM

#

yes

somber glade Jul 14, 2020, 1:38 AM

#

That's fairly simple. You would just just identify the controllers when the game starts. Figure out what's player 1 or 2. Then listen for a button press on the second controller, if that button gets pressed you can then spawn a pawn for that player to control.

#

since it is all on the same screen and machine you don't really need to worry about dealing with replication or anything like that.

ashen pebble Jul 14, 2020, 1:39 AM

#

Would I have to create a player controller for each one?

somber glade Jul 14, 2020, 1:39 AM

#

You'd create a single player controller class

#

I would expect they'd both be using the same class.

#

The game would automatically assign a player controller to any controller that is connected.

#

When the game starts and someone picks 1 player, then you'd only spawn a pawn for the first player controller.

#

later if a button is pressed on the second player controller you spawn a pawn for them at that time.

ashen pebble Jul 14, 2020, 1:40 AM

#

Do I need to make a separate character for the people who haven't spawned yet?

#

To identify the button press

somber glade Jul 14, 2020, 1:41 AM

#

When you do local coop like that, your player controllers are identified by number.

#

0 is the first player, 1 is player 2.

#

You can assign a join button, like say B button

ashen pebble Jul 14, 2020, 1:42 AM

#

But wouldn't they need a character for that?

somber glade Jul 14, 2020, 1:42 AM

#

when B button is pressed you can check "is this player controller ID 1?" if yes "Do I have a pawn?" if no, spawn a pawn.

#

No.

#

You can just toss player controller 1 into a "spectacting" or "invisible" pawn.

ashen pebble Jul 14, 2020, 1:43 AM

#

Oh

somber glade Jul 14, 2020, 1:43 AM

#

Make your default pawn for the level an invisible pawn with no body.

ashen pebble Jul 14, 2020, 1:43 AM

#

okay

somber glade Jul 14, 2020, 1:43 AM

#

and if B is pressed, check your pawn. if pawn = invisible pawn then create a real pawn and possess that.

ashen pebble Jul 14, 2020, 1:44 AM

#

Okay

somber glade Jul 14, 2020, 1:52 AM

#

@ashen pebble This might help you: https://www.youtube.com/watch?v=PpGdOCvWk74&feature=youtu.be

YouTube

Red Line Games

Unreal Engine 4 Local Multiplayer Tutorial Part 1 - Spawning Players

These short tutorial series will show you how to set up a basic framework for a local multiplayer game using Unreal Engine 4.
In the next part I will show you how to set up a camera system that works as shown in the footage of our game Turf Wars.

If the tutorial was helpful ...

▶ Play video

ashen pebble Jul 14, 2020, 1:53 AM

#

Oh thanks

lavish cypress Jul 14, 2020, 2:20 AM

#

Is replicating an FNetworkGUID as light as replicating an int32?

#

or are there extra checks or bandwidth required

chrome bay Jul 14, 2020, 7:58 AM

#

Get excite
https://www.youtube.com/watch?v=3HLvNu-j6eg

YouTube

Dave Ratti

Network Prediction Physics 1

Quick video demonstrating the recent work to support physics in Network Prediction.

▶ Play video

scenic flint Jul 14, 2020, 8:08 AM

#

@lavish cypress Considering the docs list a FNetworkGUID as a uint32 I'd guess yea its the same as both uint32 and int32 are both 4 bytes in size

chrome bay Jul 14, 2020, 8:09 AM

#

Why would you replicate one manually anyway?

winged badger Jul 14, 2020, 8:10 AM

#

you can't assign an arbitrary NetGUID

#

engine will just break if you do

scenic flint Jul 14, 2020, 8:10 AM

#

heh I dunno what it really is tbh I just looked up the docs. because normally a GUID is much larger in size (32 - 36 char string)

lavish cypress Jul 14, 2020, 8:10 AM

#

I'm not replicating manually, just curious if the underlying system behind replicating a uobject reference (fnetworkguid) is equivalent to an int32

chrome bay Jul 14, 2020, 8:11 AM

#

(Not that I think you can replicate them anyway)

lavish cypress Jul 14, 2020, 8:11 AM

#

or if there's an extra overhead

chrome bay Jul 14, 2020, 8:11 AM

#

It depends what the object is. If it's an asset like a class, it will first be replicated by it's full FName until an FNetworkGUID is acked for it

scenic flint Jul 14, 2020, 8:11 AM

#

I'd say going by the docs that list it as a uint32 that it should be about the same as they should in all reasoning be the same size

winged badger Jul 14, 2020, 8:11 AM

#

they are obviously handled differently, with server keeping a list of acknowledged GUIDs

#

clients keeping a list of received NetGUIDs they haven't resolved yet

#

which lets, for example, an OnRep for a pointer to replicated Actor fire when that Actor replicates

lavish cypress Jul 14, 2020, 8:12 AM

#

Interesting, that's exactly what I was looking for, thanks!

chrome bay Jul 14, 2020, 8:13 AM

#

The really cool thing is how it just magically fixes up all your references regardless of order etc. Forget how much UE networking does for you behind the scenes...

scenic flint Jul 14, 2020, 8:13 AM

#

that can be a double edged sword tho 🙂

winged badger Jul 14, 2020, 8:14 AM

#

it also doesn't replicate the actors loaded from package by full name for the first time

#

therefore, you can't assign arbitrary NetGUIDs

#

the last bit in NetGUID carries a special significance, static vs. dynamic Actor as well

scenic flint Jul 14, 2020, 8:15 AM

#

took me 3 days to figure out ho to change movement speed via blueprints (without a custom c++ CharacterMovement Class) and not have it toss out all kinds of sync warnings/errors

chrome bay Jul 14, 2020, 8:15 AM

#

Heck I don't even think you can really do it from BP because of the way rewinding/replay works

#

With all that being locked into CPP

winged badger Jul 14, 2020, 8:15 AM

#

blueprint has about 10% networking tools available

chrome bay Jul 14, 2020, 8:16 AM

#

yeah

scenic flint Jul 14, 2020, 8:16 AM

#

the way I ended up doing it (was quite complicated) didn't show anything in any of the logs

winged badger Jul 14, 2020, 8:16 AM

#

you can't do anything but the raw basics, and even that is clumsy and has odd behavior

lavish cypress Jul 14, 2020, 8:16 AM

#

What's this replay/rewind functionality you speak of, can I read more about this somewhere?

#

e.g a header file

chrome bay Jul 14, 2020, 8:16 AM

#

Well all the source is available, you can look at CharacterMovementComponent.h / .cpp

winged badger Jul 14, 2020, 8:17 AM

#

ouch 😄

chrome bay Jul 14, 2020, 8:17 AM

#

But even then you have to read and follow it through a few times and it's around 6K lines at this point

rough iron Jul 14, 2020, 10:33 AM

#

Hey guys i am having some trouble understanding why the attack animations won't show on clients?https://media.discordapp.net/attachments/732521364195377272/732535541970632704/unknown.png
https://cdn.discordapp.com/attachments/732521364195377272/732535460886478908/unknown.png

grizzled stirrup Jul 14, 2020, 12:23 PM

#

@chrome bay Yesterday you mentioned to avoid calling Steam API calls directly, I've noticed that the generic UE write leaderboard subsystem call only allows for a single score value to be submitted to the Steam leaderboard, with any other data (kills / deaths / ratio etc.) being lost. In this case would you consider calling the Steam API functions directly in order to have a fully functional leaderboard?

#

The achievements and session interface functions work find so I assume that you just have to make the call for more specific features

chrome bay Jul 14, 2020, 12:24 PM

#

AFAIK steam only stores single values for the leaderboard doesn't it?

#

As they are driven by the stats system

grizzled stirrup Jul 14, 2020, 12:24 PM

#

It takes in an array of ints for secondary data

#

UE's function passes in null there

chrome bay Jul 14, 2020, 12:24 PM

#

Oh, I've never seen that

grizzled stirrup Jul 14, 2020, 12:25 PM

#

Yeah I have it working when calling the steam functions direclty

#

But can't if using the generic interface calls

chrome bay Jul 14, 2020, 12:25 PM

#

Since I'm working on a cross-platform game, we would just modify all the interfaces to take that array

grizzled stirrup Jul 14, 2020, 12:25 PM

#

Ohhh right so you use engine source

chrome bay Jul 14, 2020, 12:25 PM

#

And ignore it on platforms where it doesn't matter

grizzled stirrup Jul 14, 2020, 12:25 PM

#

Yeah it'd be a simple tweak there

#

SteamUserStatsPtr->UploadLeaderboardScore(LeaderboardHandle, UpdateMethodSteam, NewScore, NULL, 0);

#

Would just mean passing in the int array and the num elements in that array for the last 2 arguments

#

And would work fine

#

Thanks that makes sense I'll consider moving to a source build

chrome bay Jul 14, 2020, 12:28 PM

#

Since the OSS stuff is in a plugin form you can also just copy the plugins to your project plugins directory and override the behaviour there also 🙂

grizzled stirrup Jul 14, 2020, 12:28 PM

#

Oh that's much easier! Good idea

#

Will UE always use the project dir version of the plugin over the one in the engine dir if it detects two the same?

chrome bay Jul 14, 2020, 12:30 PM

#

As far as I know yes, I honestly wasn't aware of it until we did it with the vehicle physics plugin.

#

But we're workign from source so I don't know if we made other changes to make it work

#

Hard not to work from source once you've got it stable though 😄

winged badger Jul 14, 2020, 12:31 PM

#

we avoid modifying source

#

you can usually make a non-hacky workaround without incurring the maintenance cost

chrome bay Jul 14, 2020, 12:32 PM

#

yeah the maintenance can be a major issue

winged badger Jul 14, 2020, 12:32 PM

#

and you have what? 2 people in studio capable of maintaining it total i imagine

chrome bay Jul 14, 2020, 12:33 PM

#

Literally 2 in our case 😄

winged badger Jul 14, 2020, 12:34 PM

#

i can often spend significant amount of time structuring the system to not just work but also be easy to maintain

#

it pays off

grizzled stirrup Jul 14, 2020, 12:36 PM

#

@winged badger In this case (where inputs aren't available in the generic subsystem interface calls), what would you do? Project dir plugin or directly call the steam API?

#

Project dir plugin sounds like it could be good but would have to be maintained with future engine versions

winged badger Jul 14, 2020, 12:37 PM

#

with steam API its unlikely to significantly change

#

they still use the coding style from last century

#

because they don't like changing it

#

a small wrapper seems like a way to go

grizzled stirrup Jul 14, 2020, 12:38 PM

#

So you'd call those functions directly but use the generic interface for other subsystems potentially?

#

I'm not sure how to go about writing a wrapper unless it's an if statement with direct API calls and generic calls

winged badger Jul 14, 2020, 12:39 PM

#

you don't need to take the entire engine plugin

#

and modify it

#

you can just create a small plugin that wraps few troublesome calls in the engine plugin

#

that lowers your maintenance cost significantly

#

you could even leave it in main project, depending on the case

grizzled stirrup Jul 14, 2020, 12:41 PM

#

That does sound like a nice clean solution

#

Especially since the generic interface works for most things

#

I'll look for some examples on how to do that (wrapping specific logic)

waxen socket Jul 14, 2020, 12:48 PM

#

Good morning, everyone. Yesterday I got some advice from this channel on replicating rotation. I ended up creating this which functions but was told by Cedric that it doesn't look like an efficient method.

📎 Rotaplication.jpg

#

Does anyone have any advice on improving this logic?

meager spade Jul 14, 2020, 1:22 PM

#

A: Don't do logic like that in your RPC

#

your rpc should just set the servers version

waxen socket Jul 14, 2020, 1:23 PM

#

Okay.

meager spade Jul 14, 2020, 1:23 PM

#

on tick, you should use that axis value (if it has changed)

#

to drive your updates

#

peronally tho

#

depending on what you are doing

#

i would just do all the stuff on the local client and just RPC the location after client has decided it.

#

and server just sets the location

#

then you can just interp to that new location

waxen socket Jul 14, 2020, 1:25 PM

#

What I'm trying to achieve is the ship rotation seen in this game here: https://youtu.be/xCi14KUbVi4?t=29

YouTube

zero007ist

Platypus 2 - Level 1

▶ Play video

#

I need to replicate it to up to four players.

meager spade Jul 14, 2020, 1:26 PM

#

i am pretty sure the CMC handles that tho via control rotation

#

🤷

waxen socket Jul 14, 2020, 1:27 PM

#

I noticed those controls the other day.

#

These ones.

📎 Screen_Shot_2020-07-13_at_1.08.05_PM.png

#

But no one seems to mention them. I'd definitely use them if that's a possbility.

meager spade Jul 14, 2020, 1:27 PM

#

check the main character

waxen socket Jul 14, 2020, 1:28 PM

#

That screenshot is from a class that inherits from Character.

meager spade Jul 14, 2020, 1:28 PM

#

no thats CMC

#

check the main character

#

defaults

#

https://www.thegames.dev/snaps/rider64_6XQDf0OTFR.png

#

search for them

waxen socket Jul 14, 2020, 1:32 PM

#

Found them in the inherited variables.

📎 Screen_Shot_2020-07-14_at_10.32.14_AM.png

#

Can this actually be used to replicate rotation? I've done a lot of searching and never seen mention of these.

cursive mortar Jul 14, 2020, 1:39 PM

#

@waxen socket I have used those for a 3rd person, top-down RPG when rotating the character with mouse (DIablo style). In my case, I had to make sure everything is false.

waxen socket Jul 14, 2020, 1:39 PM

#

Thanks, Wolfram.

#

And your rotation was replicating smoothly?

cursive mortar Jul 14, 2020, 1:41 PM

#

Yes, I managed to make it really smooth. It also works when attacking. Tried so far with 2 players, and also the 2nd player sees it smooth. Tried it in PIE and on dedicated server.

waxen socket Jul 14, 2020, 1:42 PM

#

I don't suppose you built it with blueprints?

cursive mortar Jul 14, 2020, 1:43 PM

#

I did it with C++

#

I also made some adjustments to the rotation angle, to rotate character if value is >0.5 degree or something like that. What I do is deproject mouse cursor in map, and make the character rotate towards the cursor.

waxen socket Jul 14, 2020, 1:46 PM

#

Well, I'm not using the mouse myself, just InputAxis values. But maybe these booleans are what I need to look into.

cursive mortar Jul 14, 2020, 1:47 PM

#

This is what I also changed:
ThisMovementComponent->bUseControllerDesiredRotation = true;
ThisMovementComponent->bOrientRotationToMovement = false;
ThisMovementComponent->RotationRate = FRotator(0.0f, 0.0f, 0.0f); //used when UseControllerDesiredRotation = true

waxen socket Jul 14, 2020, 1:48 PM

#

Wow, thank you.

cursive mortar Jul 14, 2020, 1:48 PM

#

bOrientRotationToMovement, anyway, doesn't have to seem any impact

waxen socket Jul 14, 2020, 1:48 PM

#

That maybe have to do with rotating the camera? I seem to remember something like that.

cursive mortar Jul 14, 2020, 1:49 PM

#

For camera, I did some more adjustements as well

#

for spring arm, more exactly

#

@waxen socket
Maybe this will offer you insight:
//setup SpringArmComp for player
SpringArmComp = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArmComp"));
if (SpringArmComp)
{
SpringArmComp->bUsePawnControlRotation = false; //false, to be able to set angle. If 3rd person, set to true
SpringArmComp->TargetArmLength = 900;
SpringArmComp->SetRelativeRotation(FRotator(-60.0f, 0.0f, 0.0f));
SpringArmComp->bInheritPitch = false;
SpringArmComp->bInheritRoll = false;
SpringArmComp->bInheritYaw = false;
SpringArmComp->SetupAttachment(RootComponent); // attach to rootcomp

    //setup camera for player
    CameraComp = CreateDefaultSubobject<UCameraComponent>(TEXT("CameraComp"));
    CameraComp->SetupAttachment(SpringArmComp);
}

waxen socket Jul 14, 2020, 1:51 PM

#

I appreciate that but I'm only trying to recreate the ship rotation seen here: https://youtu.be/xCi14KUbVi4?t=29

YouTube

zero007ist

Platypus 2 - Level 1

▶ Play video

#

It's a fixed camera so I don't have need of a springarm.

#

Your generosity is very much appreciated though.

cursive mortar Jul 14, 2020, 1:58 PM

#

@waxen socket That might be easier to do. Based on the axis value, positive or negative, you can make the ship rotate whenever value changes from the previous state. I would use a boolean for that.

waxen socket Jul 14, 2020, 1:59 PM

#

Depending on how fast the player is ascending or descending, the InputAxis value will be different so I'm not sure I can just use a boolean. And I need the client and the server to match pretty accurately as the collision will be rotating too.

#

Here's another example: https://youtu.be/RRa2Q2FwwbQ?t=62

YouTube

Strigifo

UE4 - Entire SHMUP Game Template - Udemy Course

Hey there and thanks for checking this video. If you're interested in my course or even just to learn more about it then please follow the link to my site below.

My Website: http://sygami.com/courses/
Udemy Course: https://www.udemy.com/unreal-engine-4-learn-to-make-a-game-pr...

▶ Play video

cursive mortar Jul 14, 2020, 2:02 PM

#

@waxen socket yeah, I know this one. There is an entire tutorial on Udemy replicating this game step by step

waxen socket Jul 14, 2020, 2:03 PM

#

Yes, but without replication.

cursive mortar Jul 14, 2020, 2:03 PM

#

I mean as copying :)))

waxen socket Jul 14, 2020, 2:03 PM

#

The tutorial is single-player.

#

I understand, yes.

cursive mortar Jul 14, 2020, 2:03 PM

#

yeah

meager spade Jul 14, 2020, 2:03 PM

#

the control rotation can rotate your ship

#

based on input

waxen socket Jul 14, 2020, 2:05 PM

#

Okay, I'm gonna give it a shot. It just seemed like there wasn't a built-in way to do this since everywhere I asked I was told to build custom logic. 🤷‍♂️

meager spade Jul 14, 2020, 2:08 PM

#

https://www.thegames.dev/snaps/GNKcdrKRmT.mp4

▶ Play video

waxen socket Jul 14, 2020, 2:09 PM

#

😲

#

That's all I've ever wanted.

meager spade Jul 14, 2020, 2:09 PM

#

🤷

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1 minute to do that

waxen socket Jul 14, 2020, 2:10 PM

#

Can you share your steps?

meager spade Jul 14, 2020, 2:13 PM

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https://www.thegames.dev/snaps/UE4Editor_pMgoaKj4m2.png

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https://www.thegames.dev/snaps/UE4Editor_QmQ1h315kN.png

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https://www.thegames.dev/snaps/UE4Editor_6vVjs1R0lu.png

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https://www.thegames.dev/snaps/UE4Editor_ig6XeojLDj.png

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that is all i did

waxen socket Jul 14, 2020, 2:15 PM

#

Okay, I'm gonna try.

meager spade Jul 14, 2020, 2:16 PM

#

fully replicated aswell

#

no need to do additional RPC's

waxen socket Jul 14, 2020, 2:19 PM

#

That's fantastic. But I do need it to have a maximum and it needs to lerp back to neutral when there's no input. Do you think I can use this technique for that too?

meager spade Jul 14, 2020, 2:31 PM

#

you can handle tha via tick

#

and send the control input

#

axis input is just a tick call anyway

#

tick apply inputs

#

then lerp back

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when no input is done

#

all on the client

waxen socket Jul 14, 2020, 2:37 PM

#

This is what I'm trying but it doesn't seem to respect the clamps. 🤔

📎 Screen_Shot_2020-07-14_at_11.36.19_AM.png

meager spade Jul 14, 2020, 2:38 PM

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input it -1 to 1

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you cant feed it higher than that

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or lower

waxen socket Jul 14, 2020, 2:39 PM

#

Oh!

rich ridge Jul 14, 2020, 3:28 PM

#

Hi , I m struggling with beacons from past one week.

#

EOSPartyBeaconClient_0[IpConnection_3] Client received: Challenge

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my client is getting challenge

shadow aurora Jul 14, 2020, 3:53 PM

#

So if I'm doing a timeline movement of a player's camera and springarm, do I need to net-multicast it? I've been having some issues where if I only update it on the server then the client doesn't see the smooth transition, and if I only do it on client then there's some rubber-banding. I assume the rubber-banding is due to the server trying to correct the position of those components.

winged badger Jul 14, 2020, 4:41 PM

#

@shadow aurora timeline movement, or position of those components should not be replicated

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just a call to start the timeline locally

shadow aurora Jul 14, 2020, 4:43 PM

#

The issue I'm having is that the server seems to keep correcting the position of those components whenever I update them via client-side functions @winged badger

winged badger Jul 14, 2020, 4:43 PM

#

you should not be replicating their position

shadow aurora Jul 14, 2020, 4:49 PM

#

Ok so, say I set the location/rotation of the player's springarm/camera via a timeline to match the location/rotation of another character's springarm/camera on a client-side function. Not replicating the position of the components.

When I then call possess on the second character (Server-side), I am seeing a jitter on the possess because the springarm/camera positions aren't the same on the server. Because if I print out the values client-side they're the same for the old character and the new character. But if I print them out server-side they're different.

Any idea how I can remedy that?

winged badger Jul 14, 2020, 5:04 PM

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client already updates camera under the hood

#

GetPlayerViewPoint in the PC is how you grab the position

#

its a unreliable server RPC sent quite frequently

#

that point is also the vector from which your distance based relevancy is calculated

shadow aurora Jul 14, 2020, 5:06 PM

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Yeah I had checked that out at some point. But basically this is what's happening: https://gyazo.com/2d5e450dda1c7b7cfc08ec02f1acc8f1

Gyazo

▶ Play video

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And that only happens on the client. The host is completely smoothed out.

winged badger Jul 14, 2020, 5:21 PM

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that doesn't look like network jitter

soft relic Jul 14, 2020, 5:21 PM

#

📎 unknown.png

#

how to fix the client invalid version problem?

winged badger Jul 14, 2020, 5:22 PM

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use the same version of the game

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keeping in mind that source build and launcher build are not the same version

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even if they have the same files to start with

shadow aurora Jul 14, 2020, 5:24 PM

#

I just can't figure out what else it might be @winged badger. If I'm setting spring arm target arm length + springarm/camera world location & rotation what else is there that could be causing that jitter? I am also smoothing socket offset and target offset as a precaution even those are just set to zero vectors.

[Edit] This is what it should look like (https://gyazo.com/94611fffdfb3992744b8d1f099342b89) this is on the host. The jitter is only on the clients.

soft relic Jul 14, 2020, 5:32 PM

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oh so I have to make the game build from the source build version? @winged badger

winged badger Jul 14, 2020, 5:32 PM

#

you can't mix launcher and source build

#

unless you override the function that does versioning

soft relic Jul 14, 2020, 5:33 PM

#

okay so I made a server from source

winged badger Jul 14, 2020, 5:33 PM

#

which i don't remember where it is

soft relic Jul 14, 2020, 5:33 PM

#

how to make the build for that one to play together

#

just a client build?

cursive mortar Jul 14, 2020, 5:42 PM

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@soft relic Yes. I am also using that for 2-3 players

soft relic Jul 14, 2020, 5:43 PM

#

the client option gives me this error

📎 unknown.png

#

📎 unknown.png

cursive mortar Jul 14, 2020, 5:45 PM

#

@soft relic Check the top option in VS (

📎 unknown.png

soft relic Jul 14, 2020, 5:45 PM

#

yeah its dev client win64

📎 unknown.png

cursive mortar Jul 14, 2020, 5:46 PM

#

Try building from inside UE4

soft relic Jul 14, 2020, 5:46 PM

#

yeah trying that now, is it fine to have the project always use the source build version?

#

for development as well

cursive mortar Jul 14, 2020, 5:49 PM

#

I am not sure what you mean with that

ashen pebble Jul 14, 2020, 6:33 PM

#

Does anyone know how to use the CopyProperties function?

tranquil yoke Jul 14, 2020, 6:37 PM

#

Guys I am getting Travel error, outdated client, what does this mean ?

#

[2020.07.14-18.37.41:203][952]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = OutdatedClient, ErrorString = The match you are trying to join is running an incompatible version of the game. Please try upgrading your game version., Driver = PendingNetDriver IpNetDriver_2147482499
[2020.07.14-18.37.41:204][952]LogNet: Warning: Network Failure: PendingNetDriver[OutdatedClient]: The match you are trying to join is running an incompatible version of the game. Please try upgrading your game version.

#

This error

half jewel Jul 14, 2020, 7:23 PM

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how do i combine COND_OwnerOnly and COND_Custom ??

limber gyro Jul 14, 2020, 8:44 PM

#

yo yo peeps, theoretical question here, so the guy from the gamelift tutorials (flopperam, mightve heard of him), had an issue when making the storm for fortnite clone, he said the storm only replicated when he ticked the "relevant to all" box, so heres the question, arent actors put in the map replicated by deafult because they have a server version aswell? why would he need to tick that box? if i make my own storm and make a distance check for the player character only (without looking for all characters in the server) will it work?

gusty slate Jul 14, 2020, 8:58 PM

#

Hello,
Is Repnotify a proper way to update UI after certain changes in replicared variables? Like kills for example.
Getting inconsistent ui updates when they are called right after a normal replication

limber gyro Jul 14, 2020, 9:10 PM

#

sorry wrong discord

#

deleted the message

winged badger Jul 14, 2020, 9:37 PM

#

@gusty slate repnotidy broadcasts a delegate letting UI update itself

#

@limber gyro server does distance check to see which data channel should the actor replicate over if your relevancy defaults to distance-based

#

relevant to all makes it not default

#

actors spawned at runtime that are not relevant to clients will get destroyed on that client and then respawned when they become relevant again

#

for something like storm, which makes sense should be visible from range greater then default 15k UU, relevant to all makes sense

#

and even if its preplaced on the level it would stop updating to the client that is outside the range

limber gyro Jul 14, 2020, 9:43 PM

#

that was my first thought too, but he said that even close to the storm it didnt work too

winged badger Jul 14, 2020, 9:45 PM

#

and they are not replicated by default

#

they are just net addressable

#

meaning you can resolve a pointer to them over network

limber gyro Jul 14, 2020, 9:55 PM

#

so if i just put my death zone actor in the map it should work without any problems?

#

form what i understand, it should work normaly but it wont be nescessarily synched with the server?

iron turtle Jul 14, 2020, 11:03 PM

#

I have a multicast call from server. When I set it as reliable it triggers normally to all connected clients (x4 + dedicated server). If I set it as unreliable it never runs on clients, only on server. Any ideas of what could be happening there?

tulip ferry Jul 15, 2020, 12:40 AM

#

Hey guys, I'm using Advanced Sessions plugin and I keep getting this error when rejoining a hosted server:

LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = ConnectionTimeout, ErrorString = UNetConnection::Tick: Connection TIMED OUT. Closing connection.. Elapsed: 30.04, Real: 30.01, Good: 30.01, DriverTime: 30.04, Threshold: 30.00, [UNetConnection] RemoteAddr: 76561198874778461:7777, Name: SteamNetConnection_2147477036, Driver: PendingNetDriver SteamNetDriver_2147477037, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID, Driver = PendingNetDriver SteamNetDriver_2147477037.

Anyone got any idea what it throws this only when I'm rejoining? Works fine the first time around.

somber glade Jul 15, 2020, 2:13 AM

#

@tulip ferry if your client loses connection are you properly destroying the old session? While I was designing a kick function, I noticed that when I kicked a client from a session, if i didn't destroy the session, it would have issues rejoining.

tulip ferry Jul 15, 2020, 2:17 AM

#

@somber glade AFAIK, yeah. Because, I'm calling destroy session before searching/joining a new session

somber glade Jul 15, 2020, 2:18 AM

#

That shouldn't be the issue then. If you restart the client it works?

tulip ferry Jul 15, 2020, 2:19 AM

#

Nope. It does not.

#

I closed the game and reopened it, it still threw the same error on trying to join

somber glade Jul 15, 2020, 2:20 AM

#

so you're only able to join once and then never again?

tulip ferry Jul 15, 2020, 2:20 AM

#

Precisely

#

And this is ofc with the host running the same session all throughout

somber glade Jul 15, 2020, 2:22 AM

#

your host is a listen server or a dedicated server?

tulip ferry Jul 15, 2020, 2:22 AM

#

Listen

somber glade Jul 15, 2020, 2:22 AM

#

so if you restart that you can join again?

#

are you testing this in PIE or across the internet?

tulip ferry Jul 15, 2020, 2:22 AM

#

Across the net in a packed game. Dev build

somber glade Jul 15, 2020, 2:23 AM

#

you're using steam, so it shouldn't be a nat issue, I believe steam takes care of that.

tulip ferry Jul 15, 2020, 2:24 AM

#

It connects the first time around, tho. So it can connect. It's the rejoining that's timing out. So, that should not be an issue.

somber glade Jul 15, 2020, 2:31 AM

#

are you able to join with another client when the first client can no longer join?

#

I have a feeling that while you're destroying the session on the client, something is probably going on with the host that is not letting the client rejoin.

tulip ferry Jul 15, 2020, 2:32 AM

#

I haven't tried that last part since I only have two pcs atm

#

On the host, the logs show that I connect as a client, but then I immediately get disconnected.

somber glade Jul 15, 2020, 2:33 AM

#

does it give any errors?

twin juniper Jul 15, 2020, 2:36 AM

#

Does anyone know why the movement on this map is completely broken for the clients when I put four players in? This isn't fully replicated yet, but it works on other maps so I don't understand why it wont work here. https://streamable.com/f3m2yl

Streamable

2020-07-14 20-57-29

▶ Play video

tulip ferry Jul 15, 2020, 2:39 AM

#

@somber glade Not really.
It goes somthing like this host side:

Join Succeeded for user
LogNet::UChannel::ReceivedSequencedBunch: Bunch.bClose == true. ChIndex == 0. Calling ConditionalCleanUp.
 UChannel::CleanUp: ChIndex == 0. Closing connection. 
Channel::Close: Sending CloseBunch. ChIndex == 0.
LogOnline: STEAM: Removing P2P```

#

This all happens within a few seconds

#

And the JoinSession node side client actually prompts that the session was successfully joined to.

somber glade Jul 15, 2020, 2:44 AM

#

have you read this? https://answers.unrealengine.com/questions/337403/client-disconnect-after-rejoining-session-with-ste.html

tulip ferry Jul 15, 2020, 2:46 AM

#

Yeah. I did. However, I'm using v4.24. So I'm assuming this has been fixed.

somber glade Jul 15, 2020, 2:46 AM

#

you shouldn't necessarily assume that 😉

#

I've run into things that they've claimed to fix before that weren't fixed

tulip ferry Jul 15, 2020, 2:50 AM

#

Haha. I'll give this a shot then. See if it helps. Thanks.

somber glade Jul 15, 2020, 2:50 AM

#

Good luck, if that doesn't work, I'd post in the advanced session forum thread

tulip ferry Jul 15, 2020, 2:51 AM

#

Sure thing. Thanks again.

cursive mortar Jul 15, 2020, 7:48 AM

#

@twin juniper check the animation. Just compile it once. I had the same issue after modifying my Character. It was actually moving but without animation.

#

Also check if it behaves differently when running as a Listen Server or Client on a Dedicated server.

#

@twin juniper what animation set are you using?

trim kindle Jul 15, 2020, 9:32 AM

#

Player's mouse click order in RTS game. Reliable or unreliable? Player can spam mouse clicking but also missing some single order may not feel right.

chrome bay Jul 15, 2020, 9:41 AM

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Reliable IMO

#

With a frequency cap

#

Though, if a player can click a mouse 60-odd times a second I'll eat myself

cursive mortar Jul 15, 2020, 9:42 AM

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@chrome bay you can use autoclicker at 1ms time :)))

chrome bay Jul 15, 2020, 9:42 AM

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Yeah but then server should give them the boot anyway 🙂

cursive mortar Jul 15, 2020, 9:43 AM

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yep XD

trim kindle Jul 15, 2020, 9:45 AM

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Thanks for the opinion, makes sense to me :)

gusty slate Jul 15, 2020, 9:45 AM

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Hmm, hello guys
When starting a server timer, and you hold the timer handle in a replicated variable, does that allow clients to get the time remaining even without periodically resetting the handle from the server?

chrome bay Jul 15, 2020, 9:45 AM

#

It does not

gusty slate Jul 15, 2020, 9:45 AM

#

I see

chrome bay Jul 15, 2020, 9:45 AM

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Timers are local only

#

replicating a timer handle doesn't do anything AFAIK

gusty slate Jul 15, 2020, 9:46 AM

#

I mean it makes sense it doesn't when you think about it yeah

#

Any suggestion on how to handle updating client UI when I want to track a few server timers?
Have a timer replication timer? :p

#

at x intervals

chrome bay Jul 15, 2020, 9:47 AM

#

Hmm it depends what the goal is. Timing based stuff is never particularly accurate anyway

gusty slate Jul 15, 2020, 9:47 AM

#

True yes

#

It is basically cooldowns and round timer, both in my game don't need to be exactly accurate

#

I was also wondering, do cooldowns need to be timed by the server?

chrome bay Jul 15, 2020, 9:48 AM

#

It depends I think. If it's something with a really short cooldown like a player ability, you probably want to let the client control the cooldown themselves (but still sanity-check it on the server within some tolerance)

#

If it's something that lasts a while (we have 10-min cooldowns on some stuff) - then estimating it client-side also works.

#

Also, it's best to do this kind of thing with timestamps - instead of updating a continuously updated value

gusty slate Jul 15, 2020, 9:51 AM

#

for server checks?

#

if it's client-side timed?

chrome bay Jul 15, 2020, 9:51 AM

#

On both ends

#

So just store "world time seconds" when the thing was last used or activated, and get the cooldown from that

gusty slate Jul 15, 2020, 9:53 AM

#

I see, but you would still need a periodic update to compare now vs timestamp

#

If I get what you mean correctly

chrome bay Jul 15, 2020, 9:54 AM

#

Yeah exactly

#

Or at least, you only need that if you want to check the cooldown. Our UI for example just ticks, and displays that cooldown time

#

Players have to interact with the UI to "use" that thing anyway rather than from a key press so it works for that case.

#

In my side-project my weapons have a centralized "tick" function that ticks all weapons at a fixed interval.

#

My weps need to tick anyway for various things so it's just easier that way

gusty slate Jul 15, 2020, 9:56 AM

#

I see what you mean.
I assume it is still just as secure to have the server get the timestamp and cooldown duration and then tell the client when he can use it again

#

same as having a server timer

chrome bay Jul 15, 2020, 9:57 AM

#

Well what i do, since the server is activating the "thing" anyway as well - it too stores it's own local time when it was last used.

#

If the client tries to use it again too quickly, it just ignores it

#

But accepts it otherwise within a short tolerance, to account for changes in ping etc.

#

You can use some heuristic to keep track of it over time, and check if the client is constantly calling things too early.

gusty slate Jul 15, 2020, 9:58 AM

#

I see

#

And the UI simply updates by calculating the time difference between stamps

#

well stamp and current time

chrome bay Jul 15, 2020, 9:59 AM

#

yeah

#

example

📎 Times.JPG

#

GetServerWorldTimeSeconds() is annoyingly terrible, but it's what I've got to work with in this particular case.

#

Good enough for this project though

gusty slate Jul 15, 2020, 10:01 AM

#

Interesting 🙂 I didn't think of this approach

chrome bay Jul 15, 2020, 10:01 AM

#

It can also potentially be faster than doing a lot of lookups for timer info too, if you're already ticking stuff.

#

Probably not measurably so though

#

But yeah now and again, manual timers are still useful (Y)

gusty slate Jul 15, 2020, 10:02 AM

#

This is a good approach too, so I can combine both to get the best results for myself
Thanks Jambax 😄 👍

cursive mortar Jul 15, 2020, 10:03 AM

#

Can't a timer run on a server, and when it finished to send a replicated value back to the client with Cond_Owner only?

chrome bay Jul 15, 2020, 10:03 AM

#

yeah you can do that too

gusty slate Jul 15, 2020, 10:03 AM

#

My initial goal was to display the remaining time of the Timer

chrome bay Jul 15, 2020, 10:04 AM

#

e.g a "locked" and "unlocked" bool or something, but if you need the actual time it's not much help

#

And there's a good chance you could miss those changes with short timers too

cursive mortar Jul 15, 2020, 10:04 AM

#

yes, exactly

#

I did that with storing the timestamp, for a custom CMC where this is relevant. I was just curious about other methods as well. Thank for info! 😄

gusty slate Jul 15, 2020, 10:08 AM

#

Another question, related to linking things with the UI. Let's say I have a death counter at the top, incremented by the server each time the player dies, what is better in your opinion:
1- Have the variable as a Repnotify and call a UI update when notified (This give me a slight delay)
2- Have the variable regularly replicated but use a binding for the death counter (This is faster than Repnotify I noticed)

#

for 2, I don't think I'll have many bindings apart from player only score/death counters

#

if I go that route

chrome bay Jul 15, 2020, 10:16 AM

#

Hmm rep notify / binding should be identical in terms of timing

#

Bindings do pretty much suck, better off putting it in the tick event.

#

HLL is UI-heavy as hell, and we tick pretty much every single widget. Still isn't a bottleneck

#

And beats the hell out of trying to maintain sync between game and UI manually

#

There's a whole discussion about UI system design there though

#

I personally like the game to be as UI-agnostic as possible, and just have the UI "sit on top" of the game so to speak

gusty slate Jul 15, 2020, 10:22 AM

#

Yeah

cursive mortar Jul 15, 2020, 10:24 AM

#

@gusty slate I use in UI also 1) verification in tick (if current value is different than the previous then I set the UI) 2) have a delegate in C++ which is call when OnRep is called. Then I bind the event in UI which handles the update.

#

Depends on how often it changes.

#

I am still not sure which one of those would be the best

gusty slate Jul 15, 2020, 10:27 AM

#

Yeah that's the question. I honestly don't think there is a huge difference, but knowing what approaches there are and which work better from other people's experiences is always nice to know

gusty slate Jul 15, 2020, 11:29 AM

#

Hmm rep notify / binding should be identical in terms of timing
@chrome bay Oddly rep notify if half a second slower if I had to estimate it. The character does an RPC to the Server PlayerController which asks the PlayerState to increment the death counter

#

and on rep notify I tell the UI to update

#

🤷‍♂️

#

Could it be because of the default low net frequency of the PlayerState? 🤔

chrome bay Jul 15, 2020, 11:33 AM

#

Well what I mean is when it comes to using either a rep notify or a ticking UI, both should be identical.

#

Since the rep notify is called as soon as the property is updated.

gusty slate Jul 15, 2020, 11:34 AM

#

I see

#

Tick is actually better than Bindings? Even in BPs?

winged badger Jul 15, 2020, 11:48 AM

#

everything is always better then bindings

gusty slate Jul 15, 2020, 11:50 AM

#

😂

#

I somehow assumed they were better than a tick for some reason

violet frost Jul 15, 2020, 1:52 PM

#

My array variable is replicating weirdly across clients. I have a GameState class with a replicated array storing all PlayerControllers of the players in the server. I use the PostLogin event in the GameInstance to update the GameState's variable. I expect that to be replicated to the client. To test that, I setup a UMG list to show the list of players and this happens...

#

📎 Screenshot_2020-07-15_at_9.52.28_PM.png

dark edge Jul 15, 2020, 2:07 PM

#

@violet frost Wait, are you trying to send all PlayerControllers to all clients? That's a pretty big nono and not necessary.

#

Each client only has 1 visible PlayerController, their own.

#

Use PlayerState, which is already replicated inside GameState.

tranquil yoke Jul 15, 2020, 2:27 PM

#

hey guys, i am using save game to save the data from lobby and then allowing server to create the Client pawn using that, it was running fine, when i tested this on locally, but now running from server it is not working fine,

Failed to read file '../../..//Saved/SaveGames/UserInfo.sav' error.

violet frost Jul 15, 2020, 2:32 PM

#

@violet frost Wait, are you trying to send all PlayerControllers to all clients? That's a pretty big nono and not necessary.
@dark edge Oh yeah, that's a good point

#

How do you get all the PlayerStates? I can't seem to find a node for that.

dark edge Jul 15, 2020, 2:36 PM

#

There should be an array of player states inside of the game state actor

violet frost Jul 15, 2020, 2:37 PM

#

Oh yeah found it, thanks so much!

twin juniper Jul 15, 2020, 3:44 PM

#

If one actor(replicated) spawns another actor(not replicated) does the spawned actor still get replicated on the clients?

#

Because the parent who spawned it is replicating?

soft shell Jul 15, 2020, 3:48 PM

#

When a client joins a level, with a server spawned actor which has a replicated variable on it.. Is the variable guaranteed to be the correct value (as set by the server some time prior) before BeginPlay is called on the actor (on the client machine)

winged badger Jul 15, 2020, 3:54 PM

#

@twin juniper existence on non replicated actor entirely depends on how its spawned

#

and it will not be replicated

#

for example, if you spawn an Actor from BeginPlay of a replicated Actor, there will be an instance of that secondary Actor on every machine

#

but it will not be replicated, or even net addressable

#

and any authority checks made on it will return authority, on every machine

twin juniper Jul 15, 2020, 3:56 PM

#

Ah gotcha.

#

Makes sense.

winged badger Jul 15, 2020, 3:56 PM

#

@soft shell it is, but with one caveat

#

if a replicated variable is a reference to a replicated Actor, then it will be valid only if that Actor already replicated

#

otherwise NetGUID will still be good, but client won't be able to resolve it at the time

twin juniper Jul 15, 2020, 3:57 PM

#

I'm getting some weird results with my code though. I have a listen server and then two other connecting clients ( 3 total) and i use a check if getlocalrole == ROLE_Authority then spawn an actor but for some reason, that code is being called three times. One per each client..

#

Shouldn't it only be called once, from the client who's the actual listen server

soft shell Jul 15, 2020, 3:58 PM

#

@winged badger - Thanks, my use case is that replicated actor testing (via BeginPlay) a replicated variable that's part of it - so it should be good..

winged badger Jul 15, 2020, 3:58 PM

#

when that Actor ref replicates later, resolving the NetGUID once that Actor replicates will trigger OnRep for the variable

#

@soft shell when a bunch to spawn an Actor arrives on a client, it contains value of every replicated variable that Actor has as well

#

so packet loss, lag... etc can't affect it, they will get there

soft shell Jul 15, 2020, 4:04 PM

#

Nice; it just means that the actor can go straight to the "correct configuration" (via a test in BeginPlay on the variables)

winged badger Jul 15, 2020, 4:04 PM

#

replicated variables are set, then onreps are called, then PostNetInit function in c++

#

which (indirectly) calls BeginPlay

soft shell Jul 15, 2020, 4:04 PM

#

Appreciate the detailed explanation 😄

winged badger Jul 15, 2020, 4:05 PM

#

btw, if you fill those variables via ExposeOnSpawn in BP or Deferred Spawn in c++ before you call FinishSpawning

#

those variables will have correct values before server calls BeginPlay, too

#

which allows you to branch your logic between server/client way less

#

so its an effective tool

twin juniper Jul 15, 2020, 4:06 PM

#

@winged badger can you explain this behavior to me?

soft shell Jul 15, 2020, 4:06 PM

#

Excellent, thanks..

winged badger Jul 15, 2020, 4:07 PM

#

spawning an actor (if the world began play) will end with actor calling beginplay

#

but if you have expose on spawn variables, those will be set before BeginPlay is called

#

also, c++ version

twin juniper Jul 15, 2020, 4:09 PM

#

My pawn class in BeginPlay checks if it's role authority and if it is, it spawns an actor. That actor then spawns another actor onto the level. So if I have one listen server and two clients running, I should only see one spawned actor, but I keep seeing three.

#

For some reason Role_Authority is succeeding on every cleint

#

When it should only succeed on the listener..

#

    if(GetLocalRole()==ROLE_Authority){
        
        FActorSpawnParameters spawnparams;
        spawnparams.Owner = this;
        FVector location(FVector::ZeroVector);
        FRotator rotation(FRotator::ZeroRotator);
        
        UWorld* World = GetWorld();
        if(World){
            spawnedgrid = World->SpawnActor<AGridBase>(gridbasetospawn,location,rotation,spawnparams);
            spawnedgrid->spawntiles();
        }
    }```

winged badger Jul 15, 2020, 4:09 PM

#

// configure deferred spawn
FActorSpawnParameters SpawnInfo;
SpawnInfo.bDeferrConstruction = true;
// spawn actor
AMyActor* MyActor = GetWorld()->SpownActor<AMyActor>(MyActorClass, SpawnTransform, SpawnInfo);
// set variables
MyActor->SomeVariable = SomeValue;
// finalize spawning
MyActor->FinishSPawning(PossiblyModifiedSpawnTransform);
//BeginPlay is called

#

as opposed to

#

// spawn actor "directly"
AMyActor* MyActor = GetWorld()->SpownActor<AMyActor>(MyActorClass, SpawnTransform);
// BeginPlay is called
// set some variables
MyActor->SomeVariable = SomeValue;

twin juniper Jul 15, 2020, 4:13 PM

#

Maybe GetLocalRole is the wrong function to call?

winged badger Jul 15, 2020, 4:21 PM

#

no, replicated Actors have their roles set correctly by BeginPlay

#

if that actor is locally spawned, then it would pass the authority check

#

in that case, if (GetNetMode() != ENetMode::NM_Client) is the preferred solution

twin juniper Jul 15, 2020, 4:23 PM

#

Oh okay

#

I"l try that

#

@winged badger so should I not spawn actors from the player themselves but use something else to spawn actors as a better solution?

#

Hmmm I tried ```if(GetNetMode() != ENetMode::NM_Client){

    FActorSpawnParameters spawnparams;
    spawnparams.Owner = this;
    FVector location(FVector::ZeroVector);
    FRotator rotation(FRotator::ZeroRotator);
    
    UWorld* World = GetWorld();
    if(World){
        spawnedgrid = World->SpawnActor<AGridBase>(gridbasetospawn,location,rotation,spawnparams);
        spawnedgrid->spawntiles();
    }
}```

And its still spawning on all three clients..

#

I even tried if(GetNetMode() == ENetMode::NM_ListenServer)

#

Which means..every client must be a listen server?

#

I think the main issue is using a player pawn to spawn other actors..

#

But what else can I use to spawn actors into the game world?

#

It seems to work when I place an actor in the game world and have that actor spawn the others.

winged badger Jul 15, 2020, 4:43 PM

#

you should really use breakpoints

#

instead of guessing

twin juniper Jul 15, 2020, 4:44 PM

#

Well not really guessing.

#

The issue is

#

if(GetNetMode() == ENetMode::NM_ListenServer) always returns true if its being called from the default player pawn

#

Even if it really isn't the listen server

winged badger Jul 15, 2020, 4:45 PM

#

thats not really possible

#

you can screw up an auth check

#

by say, spawning default player pawn manually from PC on BeginPlay, for example

#

and not checking auth there

twin juniper Jul 15, 2020, 4:45 PM

#

No default pawn is spawning on its own in the level because its set in the gamemodebase

#

Not using beginplay to spawn the default pawn

winged badger Jul 15, 2020, 4:46 PM

#

then i'd guess you have a bug in your debug tools/reasoning

twin juniper Jul 15, 2020, 4:46 PM

#

Possibly

tranquil yoke Jul 15, 2020, 5:18 PM

#

@winged badger Hey, i need some information on the Copy properties, it is not being called when i join the server.
Server is dedicated and running over Cloud I join the server using OpenLevel and provide the Ip Address.

winged badger Jul 15, 2020, 5:39 PM

#

It is never called when you join server

#

For that server wouldhave to have your PS prior to joining

tranquil yoke Jul 15, 2020, 5:43 PM

#

i understand.
So what could be the way around, save Game ?

winged badger Jul 15, 2020, 5:45 PM

#

We have a subsystem pull the data

#

And we RPC it via playerstate

tranquil yoke Jul 15, 2020, 5:53 PM

#

so you save it using your subsystem and RPC inside playerstate

#

?

winged badger Jul 15, 2020, 7:07 PM

#

we have a local player subsystem handing player profiles, promotions, saving and loading game... etc

#

a GI subsystem handling entire steam

#

and a world subsystem for stats tracking and analytics

#

when joining server for the first time, the PlayerState pulls the data local player subsystem has ready

#

and RPCs is to server

#

ofc, conveniently formatted to a struct that can be sent via RPC

#

as you can't send a locally populated UObject to server

#

@tranquil yoke

real yacht Jul 15, 2020, 7:11 PM

#

@winged badger in which PlayerState pulls data from subsystem? BeginPlay?

winged badger Jul 15, 2020, 7:12 PM

#

yeah

#

after initial connection though

#

all travel is seamless

#

so data gets transferred via persisting playerstates and copyproperties implementation on server, then replicates back to clients

real yacht Jul 15, 2020, 7:13 PM

#

will that works with OpenLevel? i'm having problem with ClientTravel (ipaddress)

winged badger Jul 15, 2020, 7:13 PM

#

we do not have same GameMode, PC, PS, GS, or anything in Lobby and Combat levels

real yacht Jul 15, 2020, 7:14 PM

#

okay that make a sense

winged badger Jul 15, 2020, 7:14 PM

#

its ExecuteConsoleCommand(ServerTravel <LevelName>?listen)

real yacht Jul 15, 2020, 7:14 PM

#

what about dedicated server, no listen

#

?

winged badger Jul 15, 2020, 7:14 PM

#

with seamless travel enabled

#

doesn't matter

real yacht Jul 15, 2020, 7:14 PM

#

but what if I want to connect via ip address?

winged badger Jul 15, 2020, 7:15 PM

#

there are few differences between dedis and listen servers

#

then your players have to know how to port forward

#

which was okay 20 years ago

#

not anymore

real yacht Jul 15, 2020, 7:15 PM

#

so seamless doesnt work out-of-the box

winged badger Jul 15, 2020, 7:15 PM

#

it mostly does

real yacht Jul 15, 2020, 7:15 PM

#

I will need to port forward on my local machine?

winged badger Jul 15, 2020, 7:15 PM

#

you do need to understand how it works though

#

the server has to have ports forwarded

real yacht Jul 15, 2020, 7:16 PM

#

okay thnx!

winged badger Jul 15, 2020, 7:16 PM

#

otherwise connection will timeout

real yacht Jul 15, 2020, 7:16 PM

#

kk

winged badger Jul 15, 2020, 7:16 PM

#

because router willignore any connection request from clients

gusty slate Jul 15, 2020, 7:16 PM

#

I think you can do most of your testing + even publishing of your game (depending on design/genre) with listen servers

winged badger Jul 15, 2020, 7:16 PM

#

we use listen servers

#

its a co-op game so don't need dedis to enforce the rules like in competitive games

real yacht Jul 15, 2020, 7:17 PM

#

if everything works on dedicated server, it will also works on listen, but that doesn't apply in other way, right?

winged badger Jul 15, 2020, 7:18 PM

#

not quite

#

if you did your job well, logic will work on either

real yacht Jul 15, 2020, 7:18 PM

#

yep, depends

winged badger Jul 15, 2020, 7:18 PM

#

but there are bugs that are exclusive to dedis

#

dedi needs a source build

real yacht Jul 15, 2020, 7:19 PM

#

yep

tranquil yoke Jul 15, 2020, 7:22 PM

#

@winged badger I understand, I did not knew we cant send uobject to server,

Well i cannot do that much for now, so i am doing it saveSystem, it is working fine now.

soft relic Jul 15, 2020, 7:23 PM

#

[2020.07.15-17.12.01:107][ 0]LogLoad: Took 0.016556 seconds to LoadMap(/Game/Maps/Gameplay/Development/DebugMap) [2020.07.15-17.12.01:108][ 0]LogLoad: (Engine Initialization) Total time: 11.16 seconds [2020.07.15-17.12.50:863][467]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0) [2020.07.15-17.12.50:863][467]LogCore: Engine exit requested (reason: GenericPlatform RequestExit) [2020.07.15-17.12.50:863][467]LogCore: Engine exit requested (reason: EngineExit() was called; note: exit was already requested)
Why is this called when server is on Playfab?

winged badger Jul 15, 2020, 7:23 PM

#

you can send a reference to UObject to server

#

but for that it has to exist already on the server

#

one you created locally doesn't

tranquil yoke Jul 15, 2020, 7:25 PM

#

Thanks for the clarification, why copy properties was not getting called for the first time, now it seems pretty obvious.

#

@winged badger so if UObject is present on the server and client at the same location, If i change the data on local, it will get replicated to server with proper RPC right ?

winged badger Jul 15, 2020, 7:26 PM

#

only with RPC that has data as payload and then sets it server side

#

same rules as with all other RPCs

tranquil yoke Jul 15, 2020, 7:29 PM

#

okay understood.

#

thanks

outer wolf Jul 15, 2020, 7:42 PM

#

Hi. Does anyone know why a replicated actor pointer would point to the wrong actor on the client? I have a replicated struct that contains a pointer to an actor (the pawn spawned from gamemode). I set it on server and replicate it. The client gets the new pointer value, but it points to the wrong actor.

#

There's literally only 1 actor it could point to since there is only 1 actor on the server, but it somehow looks like it creates a new actor and points there.

winged badger Jul 15, 2020, 7:44 PM

#

best guess

#

you set the ref on BeginPlay on a replicated Actor instance

#

and you did it on clients also

#

doesn't entirely track, but statistically, its something like that

outer wolf Jul 15, 2020, 7:50 PM

#

Nah I send a RPC to server containing local player's actor pointer, then multicast it to all clients. In the multicast on the client, it receives a whole different pointer from what I sent.

#

It makes no sense

winged badger Jul 15, 2020, 7:51 PM

#

that setup doesn't make much sense

#

server is already aware what player has what pawn

#

and you probably crossed some wires as well, likely using stuff like GetPlayerPawn[Index]

tranquil yoke Jul 15, 2020, 7:53 PM

#

@winged badger For example i have a number of maps that can work as a Hosting maps, and Users can move from one map to another at will, How should i handle this kind of situation.
can one server would be handle multiple maps, or i need instances of servers running for each map ?

winged badger Jul 15, 2020, 7:53 PM

#

can't be on 2 maps at the same time

tranquil yoke Jul 15, 2020, 7:53 PM

#

I mean one client at one map another client is on another map

#

One server cant run two maps right ?

placid sparrow Jul 15, 2020, 7:54 PM

#

No

tranquil yoke Jul 15, 2020, 7:54 PM

#

So what would be solution ?

#

Multiple servers ?

placid sparrow Jul 15, 2020, 7:54 PM

#

You can stream in levels, depending on what you're doing

outer wolf Jul 15, 2020, 7:55 PM

#

I know that, it was a test to see if that was broken as well, and it is.

tranquil yoke Jul 15, 2020, 7:55 PM

#

Streaming will work ?

#

I have streaming enabled though

#

I am still to test this

#

on server

placid sparrow Jul 15, 2020, 7:55 PM

#

Yes you just need to load the level in on the server before the clients

tranquil yoke Jul 15, 2020, 7:56 PM

#

So if there are 5 clients at 5 different streamed levels, then for server , every map will be loaded if there are 5 streamed levels + presistent

#

is this correct ?

placid sparrow Jul 15, 2020, 7:57 PM

#

You can force the server to always keep the levels loaded, and only stream them on clients

tranquil yoke Jul 15, 2020, 7:58 PM

#

ah i see, One more question, server does not render right, its just handling right ?

placid sparrow Jul 15, 2020, 7:58 PM

#

There's also a server instance manager coming to the marketplace soon, if you dont want to stream

tranquil yoke Jul 15, 2020, 8:00 PM

#

So that will create create instances of server, and will also allow to tell which map and data to load for specific instance ?

placid sparrow Jul 15, 2020, 8:00 PM

#

Yeah, essentially

tranquil yoke Jul 15, 2020, 8:01 PM

#

okay but for now, my way is to stream everything right ?

placid sparrow Jul 15, 2020, 8:03 PM

#

It depends on what you're trying to accomplish and the layout of your levels. But yes streaming should be fine for you

tranquil yoke Jul 15, 2020, 8:04 PM

#

its kind of a social interacting app, where people can interact with each other, and explore different maps at same time, so users may go back and forth between different maps.

placid sparrow Jul 15, 2020, 8:05 PM

#

Then server instances may be better for that

tranquil yoke Jul 15, 2020, 8:12 PM

#

okay i see

frozen fog Jul 15, 2020, 8:33 PM

#

Hey guys, is it possible to replicate inherited variables? For example bHiddenInGame or similar variables that come from C++?

real yacht Jul 15, 2020, 8:40 PM

#

no I think

#

why do you need that?

frozen fog Jul 15, 2020, 8:42 PM

#

to replicate internal variables like those

#

i assume the way to go is using RPCs, right?

real yacht Jul 15, 2020, 8:43 PM

#

yep RPC

frozen fog Jul 15, 2020, 8:45 PM

#

thanks 😋

soft relic Jul 15, 2020, 9:35 PM

#

Does anyone know what the issue is with playfab giving me a d3d dll missing when trying to launch the server there?

meager spade Jul 15, 2020, 10:09 PM

#

bHiddenInGame is replicated

#

@frozen fog

#

ah

#

its bVisible

#

    UPROPERTY(EditAnywhere, BlueprintReadOnly, ReplicatedUsing=OnRep_Visibility,  Category = Rendering, meta=(AllowPrivateAccess="true"))
    uint8 bVisible:1;```

#

that is replicated by default

crystal crag Jul 15, 2020, 11:30 PM

#

I am trying to tackle replicating custom uobjects again. I am getting everything to replicate as expected with just one exception - the OnRep call is only being called once when the TArray is populated. The array continues to be replicated, but the OnRep never seems to get called again. Does anyone have any ideas as to what could be going on?

meager spade Jul 16, 2020, 12:33 AM

#

you are changing values?

crystal crag Jul 16, 2020, 12:37 AM

#

Yeah

meager spade Jul 16, 2020, 12:37 AM

#

how many replicated props you got

#

cause there is a bug if you only have one

crystal crag Jul 16, 2020, 12:37 AM

#

just the one for now. I'm keeping it simple to start

#

oh lol

meager spade Jul 16, 2020, 12:37 AM

#

OnReps fail to go

crystal crag Jul 16, 2020, 12:37 AM

#

that's probably the issue then

meager spade Jul 16, 2020, 12:37 AM

#

just put a random rep bool

crystal crag Jul 16, 2020, 12:37 AM

#

let me add another one and check

#

ok

meager spade Jul 16, 2020, 12:37 AM

#

and see if it fixes it

crystal crag Jul 16, 2020, 12:37 AM

#

I'm using 4.25.1 btw; not sure if the bug is in there or not

meager spade Jul 16, 2020, 12:38 AM

#

its in 4.24

#

so possibly

crystal crag Jul 16, 2020, 12:38 AM

#

Ok

#

Oh nvm, there are four properties on the object.

#

The object is created / replicated with the FGuid being invalid. Then I run a console command to populate it on the server, and then when I double check the guid has been populated with the correct value. So I'm 99% of the way there!

crystal crag Jul 16, 2020, 12:57 AM

#

What would be helpful is, in 4.25.x, does anyone know how to get the server process window to show up?

#

I can test the server/client setup, but I can't see any server output. It's been hidden away for some reason

meager spade Jul 16, 2020, 1:08 AM

#

no idea

#

i noticed that aswell

crystal crag Jul 16, 2020, 1:16 AM

#

Hm... ok well further testing shows that the FGuid is actually different than the server's. At least as far as I can tell.

#

so the FGuid is replicating, but not with the correct value

#

Could it be that it is not getting a stable name, so it is duplicating the object and re-initializing the guid?

#

when testing under a single process and using offline mode, the guid gets set and returned as the same value

#

so at this point, it really suggests something is whacky with the replication

spring swift Jul 16, 2020, 2:23 AM

#

Hey, I'm looking for some help.im using UE4 19, I'm in the middle of developing a climbing system, watched a few tutorials to see how others did it but i was wondering,
Why cant a client use a set actor location node, the server doesn't see it happening, and the client is trying to move but is being pushed back for some reason, I used some custom events to run to server then replicate it on all clients but when i do that, nothing happens and seems to stop the server from moving too, any thoughts?

crystal crag Jul 16, 2020, 2:24 AM

#

The server is the authority

#

it holds the position of your character

#

if you go outside the tolerance of where the server thinks you are at, then locally the client will reposition to where the server thinks you should be

spring swift Jul 16, 2020, 2:25 AM

#

that makes alot more sense then how mu brain puts it together, would you know any ways around?

crystal crag Jul 16, 2020, 2:25 AM

#

that's how you get the rubber banding effect 🙂

#

I don't... think you want to try to work around that

#

sec in a game

spring swift Jul 16, 2020, 2:26 AM

#

np

#

well to make my climbing work ive been using the SetActorLocation node, but im considering using the add movement input instead

#

but im unsure how that will go, if it has the same effect or if it will allow the clients to move

lament kettle Jul 16, 2020, 2:39 AM

#

Is there a way to replicate to clients only nearby, instead of sending the data to all players?

Think of a top down game, and a players actions are not important across the map.

spring swift Jul 16, 2020, 2:40 AM

#

isnt that just replication notify? ive herd you can do somthing like that before, ill do a quick check theres a tutorial somewhere

#

i cant locate it atm but i know there is somthing for you

lament kettle Jul 16, 2020, 2:51 AM

#

I found a YT video that explains what I need well.

crystal crag Jul 16, 2020, 2:54 AM

#

I think that has to do with actor relevance

#

could be wrong though

lament kettle Jul 16, 2020, 2:54 AM

#

https://youtu.be/KsORRtBOJYc

YouTube

BRY

🎮 UE4 Replication - Part 4: Multicast & RepNotify - Unreal Engine

🎮 Unreal Engine Replication Series - Part 4: Multicast & RepNotify

Part 4 of our replication series unlocks limitless potential with Mutlicast and RepNotify! In this video, we dive deeper about how Actor Replication really works as well as introduce ourselves to a variable re...

▶ Play video

#

This video explains everything.

crystal crag Jul 16, 2020, 2:54 AM

#

rainbow_donut I basically was just trying to say I think you need to go with a different design

#

I havne't personally tried to do a climbing game, but I haven't heard of seen of a case where you want to try to get around the behavior you are facing

limber gyro Jul 16, 2020, 2:59 AM

#

I have an array inside the game instance that resets when i load another map, any 1 seen anything similar, could this be network related, i am under the impression that the game instance only exists localy but it never hurts to ask

swift kelp Jul 16, 2020, 3:04 AM

#

SessionInterface->GetResolvedConnectString(SessionName, Address)
I use that but it gives me an Address that is not based on the SessionName
or it isn't my Host IP address
I'm only hosting one game and there is only one host (my own pc hosting myself), and it is not getting My own IP address correct
any ideas?

spring swift Jul 16, 2020, 6:52 AM

#

hmm it is a bit of a bummer honestly... the gameplay works signally but if it wont work for multiplayer well as you said not a good idea 😦

cedar finch Jul 16, 2020, 8:22 AM

#

I'm trying to add swimming to my game but I noticed that clients have a "jitter" in their rotation. I tried making a gif but the jitter doesn't really show up in the gif. It's just a "laggy" look/feel. I'm not sure what I'm supposed to replicate so that it will stop jittering. I know it's probably they way I set the rotation of the player but I thought you guys may know a good approach.
https://i.gyazo.com/84cbf889e8fd22868690636f82931fa1.gif
https://i.gyazo.com/693b93fac79b027d1b849fde074b3191.png
https://i.gyazo.com/eabcdb53e78182977023d898754bc1e0.png

violet frost Jul 16, 2020, 11:40 AM

#

Hey guys, I'd like to know whether setting the global time dilation in a multiplayer game will automatically be replicated. (E.g. if I set the global time dilation from the GameMode)

winged badger Jul 16, 2020, 11:48 AM

#

so, set time dilation to something other then 1 in GameMode and see if client slows down @violet frost

#

its a trivially easy test to do

violet frost Jul 16, 2020, 11:49 AM

#

Aight

meager spade Jul 16, 2020, 2:01 PM

#

it is

#

📎 unknown.png

clear copper Jul 16, 2020, 3:12 PM

#

When I select my character in the Lobby Level, how do I retain that information after using ServerTravel to get to the game level?

#

after selecting my character it gets updated in my GameState, but when I servertravel to the new level my GameState resets itself

swift kelp Jul 16, 2020, 3:19 PM

#

getting the wrong IP and 0 for port when running
SessionInterface->GetResolvedConnectString(SessionName, Address)
any ideas?

#

At first I thought it was a simple mistake so I removed it, now I am actually stuck.

#

is there a way you can help me debug this?

muted perch Jul 16, 2020, 3:21 PM

#

does hosting a dedicated server require port forwarding?

bitter oriole Jul 16, 2020, 3:29 PM

#

Depends

#

If you're using Steam, it doesn't

#

If you're not but implement your own NAT punch, it doesn't

#

In other cases it does

swift kelp Jul 16, 2020, 3:31 PM

#

I think my issues may be due to the VMware networking
Notice that UE4 is trying to use the same subnet as the vmware interface instead of my host computer.
It should be using my WiFi IP
Anyway, I got to get to work, when I get back, I will find a simple solution to disable all virtual NICs and try again.
that may solve the issue

muted perch Jul 16, 2020, 3:43 PM

#

@bitter oriole thank you. I have been having a lot of trouble with port forwarding for so long and it is very comforting to hear that.

cursive mortar Jul 16, 2020, 3:50 PM

#

@muted perch In my case I had to use port forwarding.

bitter oriole Jul 16, 2020, 3:53 PM

#

Port forwarding was a thing in the 2000's, but between UPNP and NAT punchthrough, it's not useful anymore except for prototyping

cursive mortar Jul 16, 2020, 3:53 PM

#

@swift kelp you can register a DNS on www.noip.com (total of 3 free hostnames, you will probably need 1), and run a small tool offered by them on your server so you won't have to use ip anymore. You will use instead a hostname (ex: Vaunture.no-ip.net)

bitter oriole Jul 16, 2020, 3:55 PM

#

Or use your platform's session system so that you need neither

unkempt tiger Jul 16, 2020, 4:48 PM

#

does a player controller replicate player inputs?

dark edge Jul 16, 2020, 6:15 PM

#

@unkempt tiger AFAIK no, but ControlRotation is replicated by default.

unkempt tiger Jul 16, 2020, 6:22 PM

#

thanks 👍

midnight karma Jul 16, 2020, 6:47 PM

#

i finish this problem

#

but thank u

lusty badger Jul 16, 2020, 7:36 PM

#

Hello! I have a question, it is possible to maintain the Player State values in Server Travel?
I have a lobby where players can select their character and so, and then the server begin the match and everybody is bring to the map, in the gameMode I spawn the pawn that is stored in the player State of the player on PostLogin, the problem is that the values don't migrate from Server Travel.

winged badger Jul 16, 2020, 7:37 PM

#

it is

#

as long as its seamless

#

or only the listen server host's PS, that one can survive hard travel

#

if you're using PostLogin, its not possible

lusty badger Jul 16, 2020, 7:38 PM

#

Ok thanks, I will take a look to the seamless server travel

winged badger Jul 16, 2020, 7:38 PM

#

if the classes of PC and PS don't change

#

seamless travel will persist their instances not just their values

#

and if they do change, then overriding copyproperties lets you populate new PS with whatever you need from old one

#

but for CopyProperties to work, both new PS and old PS have to be valid at the same time on server

#

and that doesn't work if clients are just now connecting

#

also, use HandleStartingNewPlayer, instead of PostLogin (call parent if you want default implementation -> RestartPlayer() call that spawns default pawn)

#

that function actually works for both seamless and hard travel, unlike PostLogin

lusty badger Jul 16, 2020, 7:42 PM

#

So the best way to do it is to do a seamless travel and use HandleStartingNewPlayer to generate the player pawn using it's player State, Right?

winged badger Jul 16, 2020, 7:43 PM

#

its what i do, and it works without any problems

#

also, steam sockets won't work without seamless travel

#

if thats a consideration

lusty badger Jul 16, 2020, 7:43 PM

#

also, steam sockets won't work without seamless travel
@winged badger HO! Good to know

#

Thanks for the help!

#

Is there any limitation with the seamless travel and the editor? I just implemented it but the server don't travel, the editor don't give me any error either

desert lance Jul 16, 2020, 7:49 PM

#

How do you handle debug-outputs in your code? Do you use #define DEBUG, ..., #ifdef DEBUG ... #endif?

#

Or is there something built in I could use?

winged badger Jul 16, 2020, 7:51 PM

#

yeah, it doesn't work in PIE

#

at all

lusty badger Jul 16, 2020, 7:53 PM

#

And, there's any event on the player character that is call when a new map is loaded seamlessly? Or I have to call all characters from Game Mode?

winged badger Jul 16, 2020, 7:54 PM

#

you can persist characters as well by adding them to controller's seamlesstravelactorlist

#

or any arbitrary actors by adding them to gamemode's

#

stashing a ref to player character in GM would never work after hard travel

#

as the instance is destroyed

#

i find it best to put a struct with all the data required to reassemble player characters in the PS

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and then just spawn them again

lusty badger Jul 16, 2020, 7:55 PM

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Ok, Thanks for all this useful info!

winged badger Jul 16, 2020, 7:56 PM

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as part of HandleStartingNewPlayer

lusty badger Jul 16, 2020, 7:58 PM

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Is there any way of launching various instances at the same time? Or I have to always package the project?

winged badger Jul 16, 2020, 8:01 PM

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you can launch standalone non-packaged by right click on .uproject and launch

lusty badger Jul 16, 2020, 8:01 PM

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Thanks!!

desert lance Jul 16, 2020, 8:15 PM

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I want text file assets in UE for short usage-descriptions of the blueprints in a folder.

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In VS it is possible to create text files.

winged badger Jul 16, 2020, 8:17 PM

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wonders how is that a multiplayer question

cedar finch Jul 16, 2020, 8:37 PM

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If I want to play an enemy flinch anim montage when they get hit with a bullet, should I play that montage using a multicast or would that be a big No No since it will be executed so many times for every bullet that hits the enemy?

winged badger Jul 16, 2020, 8:42 PM

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client has a bullet?

cedar finch Jul 16, 2020, 9:09 PM

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I was going to play the animation on my zombie enemy when they receive damage so it would be the server event "AnyDamage"

ocean geyser Jul 16, 2020, 9:11 PM

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@cedar finch you could do that whenever you play affects. for example in the bullet or the weapon or whatever is the bullet, when a hit is made (were on the server here) call a multicast function with the hit information and play the impact effects such as blood if you hit flesh and sounds and the animation on the zombie that was hit so that way everything is in one RPC call

cedar finch Jul 16, 2020, 9:12 PM

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@ocean geyser Ahhh that's a great idea! Thanks!

crystal crag Jul 16, 2020, 9:14 PM

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Anyone here find out how to show the server console output in 4.25.x? It's really starting to hinder my debugging abilities. I can't even seem to use attach to process with VS - it's like the editor is still using one process for the server, even though Run Under One Process is unchecked...

#

📎 unknown.png

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I've tried both with the Launch Separate Server checked and without

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No one here has ever needed to look at the server output when testing in the editor since 4.25.x came out? I've read through all of the patch notes and I don't see anything about this being changed. This just started to happen when switching from 4.24 to 4.25.1

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I figured it out. @meager spade you have to add -log to the server arguments just like you do when you run it from command line

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It used to just add that option for you, but now you have to explicitly set that option.

limber gyro Jul 16, 2020, 9:39 PM

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Does any1 know if unreal have rule based matchmaking and automatic server instance deployment? or the match making they refer to is just a server browser?

dark edge Jul 16, 2020, 9:40 PM

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@limber gyro That's a question for the epic online services channel.

limber gyro Jul 16, 2020, 9:41 PM

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oh, i didnt know we had tht here

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thanks

dawn summit Jul 16, 2020, 10:36 PM

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Can anyone point me why the branch on the right is never True?

📎 unknown.png

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I am definitely controlling this pawn

winged badger Jul 16, 2020, 10:38 PM

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dedi or listen?>

fossil spoke Jul 16, 2020, 10:40 PM

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@dawn summit EventPossessed is only called on the Server.

dawn summit Jul 16, 2020, 10:40 PM

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oooh...fuuuua

winged badger Jul 16, 2020, 10:40 PM

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you can just use BeginPlay on clients

dawn summit Jul 16, 2020, 10:40 PM

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but there's not acknowledge in BP right?

winged badger Jul 16, 2020, 10:40 PM

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they actually have a controller by that time

dawn summit Jul 16, 2020, 10:40 PM

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nope, i can't...i possess them dynamically

winged badger Jul 16, 2020, 10:41 PM

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if they are possessed immediately after spawning

fossil spoke Jul 16, 2020, 10:41 PM

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Do you have access to C++?

dawn summit Jul 16, 2020, 10:41 PM

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i have...but i really don't want to make cpp class from this atm

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okay, seems no other way

fossil spoke Jul 16, 2020, 10:41 PM

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There are functions you can override to expose this to BP on the Client side.

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Cant remember which one.

dawn summit Jul 16, 2020, 10:42 PM

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possess acknowledge it is

fossil spoke Jul 16, 2020, 10:42 PM

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Yeah

dawn summit Jul 16, 2020, 10:43 PM

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well, thanks...it really helps

winged badger Jul 16, 2020, 10:43 PM

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UFUNCTION(BlueprintImplementableEvent) void ClientPossessed(APlayerController* PC);

virtual void OnRep_Controller() override
{  
  Super::OnRep_Controller();

  if (GetController())
  {
    ClientPossessed(Cast<APlayerController>(GetController());
  }
}

dawn summit Jul 16, 2020, 10:43 PM

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i was struggling with it and forgot about server only events

winged badger Jul 16, 2020, 10:43 PM

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in your pawn c++ base

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solves your issue

fossil spoke Jul 16, 2020, 10:43 PM

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Just dont forget to call Super.

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lol

winged badger Jul 16, 2020, 10:44 PM

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i think its empty

fossil spoke Jul 16, 2020, 10:44 PM

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🤷‍♂️ Still, good practice.

winged badger Jul 16, 2020, 10:44 PM

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no