#multiplayer | Unreal Source | Page 372

mild hull Feb 8, 2018, 2:15 PM

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@winter plover you want to connect to someone over inet or test with lag like you would have ?

winter plover Feb 8, 2018, 2:16 PM

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specifically connect w/ someone else yea

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among other things to test lag

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but also just to generally play around n test stuff

mild hull Feb 8, 2018, 2:17 PM

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for testing lag there are some settings https://www.unrealengine.com/en-US/blog/finding-network-based-exploits

Unreal Engine

Finding Network Based Exploits

Recently, I had an email conversation with a Gears of War fan about the differences in networking quality between each of the three games in the series. One thing that we can point to in terms of increasing the quality of the networking experience is our use of the Unreal Engine’s built in network simulation features.

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and when you open map with ?listen , than anyone can connect that knows your ip if your router lets them through with open ip

winter plover Feb 8, 2018, 2:22 PM

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Im guessing you can just do the connect command thru the session frontend console?

mild hull Feb 8, 2018, 2:24 PM

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open mapname?listen and open ip are console command, but you can also add some basic widget or launch the game with those commands

winter plover Feb 8, 2018, 2:29 PM

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ahh sweet

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think I got it working

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by opening the editor twice

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happen to know what ports ill have to forward?

mild hull Feb 8, 2018, 2:33 PM

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in the play settings is a port

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you dont need to open the editor

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"Path\UE4Editor.exe" "Path\ProjectName.uproject" /Game/ThirdPersonBP/Maps/ThirdPersonExampleMap?listen -game
"Path\UE4Editor.exe" "Path\ProjectName.uproject" 127.0.0.1 -game

winter plover Feb 8, 2018, 2:40 PM

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aight cheers

short whale Feb 8, 2018, 2:43 PM

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hey everyone! I have to create some real time multiplayer actor transform exchange via LAN but I don't seem to be able to smoothly sync via network. Even with local lerp to the set positions, it looks laggy. Are there some best practices that someone new in the engine does not know?

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I send an event to the server and the server sends them per multicast to everyone else. I have tested it from every frame to every 4 frames, the lag is always there >.<

rain coral Feb 8, 2018, 4:22 PM

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@short whale are you lerping positions of the other clients on Tick, or in the multicast function?

short whale Feb 8, 2018, 4:23 PM

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on the local update within each client in the tick

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multicast does only set the target for the lerp

rain coral Feb 8, 2018, 4:24 PM

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and you lerp from current position to target position?

short whale Feb 8, 2018, 4:24 PM

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yes

rain coral Feb 8, 2018, 4:25 PM

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with an alpha value that isn't too high, it sounds in theory like it shouldn't be warpy 🤔

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I got a question of my own - when spawning more than one client, they don't get possessed (sometimes they do after some seconds) and/or the Tick doesn't even run locally on the pawn. even with one client, it waits a second or so to get possessed. what could cause this? =/

undone girder Feb 8, 2018, 5:16 PM

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Where can I find some information about host own server with game on vps (windows)?

slender cloud Feb 8, 2018, 5:48 PM

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Anyone here have experience with AWS gamelift? Looks like they have a free tier for one year of the c4.large instance. Any idea of how many players that supports? Want to use it for internal testing before release. Has week CPU and memory, but Im not sure how dependent performance is for that for a hosted server. Also what size would people suggest I use?

hidden thorn Feb 8, 2018, 5:49 PM

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Question, if I just open the game without joining a server I am in the MainMenu should I be able to access the GameMode? Because I am trying to access it but it keeps returning null

serene umbra Feb 8, 2018, 7:23 PM

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Does main menu map have the gamemmode?

manic pine Feb 8, 2018, 7:47 PM

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dont think you can be without a gamemode... if you dont set override on map, it picks the one from project settings

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are you by chance trying to get a specific type of game mode and the cast is failing?

onyx totem Feb 8, 2018, 8:28 PM

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Guys I seen that in an older post

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That you cant replicate maps

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And sets

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Is this true?

ripe raptor Feb 8, 2018, 8:41 PM

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So... I did a pretty stupid thing.

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I made my abilities and my bubffs / debuffs UObjects. I mistakenly thought all this time that UObject contains all the replication functionality, not AActor. Question is now - how big of a general performance overhead would I bbe incurring if I switch all of my UObjects to be AActors?

light grove Feb 8, 2018, 8:52 PM

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You don't need to switch them over to AActors, you can just send a copy to the client instead of replicating.

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For example, Server_ManageBuffs calls a client function that sends a copy of the buff/debuff object to the client.

ripe raptor Feb 8, 2018, 8:57 PM

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er, a copy of a UObject?

winged badger Feb 8, 2018, 9:27 PM

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why not actor components?

ripe raptor Feb 8, 2018, 9:39 PM

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Do those replicate properly if I instantiate them at runtime?

winged badger Feb 8, 2018, 9:57 PM

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they do, as long as they are set to replicate

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they can also send Server or receive Client RPCs

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being attached to the PlayerPawn which is attached to the PlayerController

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and you can fetch the PlayerPawn by calling GetOwner()

steady tendon Feb 8, 2018, 10:31 PM

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Usually they are attached to the player controller

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Talking about actor components, anyone could answer me what i asked before? i dont know why it doesnt work...

winged badger Feb 8, 2018, 10:53 PM

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you need to replicate the event where you receive private message to OwningClient

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at a glance

steady tendon Feb 8, 2018, 10:58 PM

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@winged badger I have it, but it calls that function, thats not the problem

winged badger Feb 8, 2018, 11:15 PM

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is the variable set to replicate as well?

ripe raptor Feb 8, 2018, 11:19 PM

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I know that components replicate just fine, but I am not 100% sure that it works fine when they're spawned dynamically, as opposed to being created in the construction script.

steady tendon Feb 9, 2018, 9:35 AM

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@winged badger Yes it is dude

steady tendon Feb 9, 2018, 10:20 AM

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Ok this must be an engine bug, its not normal

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Server

📎 Sin_titulo1.png

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Client

📎 Sin_titulo2.png

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Result

📎 Sin_titulo3.png

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Component set to replicate at beginplay, integer set to replicate with default value of -1, must be engine bug, otherwise i dont understand anything

thin stratus Feb 9, 2018, 10:43 AM

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Have you printed the int on tick?

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You can't directly assume the int replicates as fast as the RPC

steady tendon Feb 9, 2018, 10:52 AM

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Same result, even if i execute the same function 10 seconds later to let the variable replicate the result is the same

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📎 Sin_titulo.png

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📎 Sin_titulofinal.png

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What i dont understand is why in the event tick there are 2 server and one of them has -1 as value, maybe thats the clue, but i dont know to understand it

gaunt crown Feb 9, 2018, 12:14 PM

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So I was just talking in Physics Room about this issue, but got a big mind blank that Physics is perfect but the Replication side of this is not budging.. Any help ? 😄 Cheers guys

https://www.youtube.com/watch?v=-jOG95PhmIY&feature=youtu.be

YouTube

Biggumzzz

2018 02 09 21 44 00

▶ Play video

mild zodiac Feb 9, 2018, 1:11 PM

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Guys I need to understand something about spawn replication:

Server spawns 100 replicated actors
Server sends array of 100 actors to all clients via multicast
Clients get the array of length 100 but some actors may not yet be valid
Is this a correct behaviour?

magic helm Feb 9, 2018, 2:23 PM

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@gaunt crown have you tried, running the physics only on the server. And send the servers transform to the client and just set the client to that? Seems to work pretty well for me

gaunt crown Feb 9, 2018, 2:25 PM

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Can you show me an example of that ? I’m still iffy with replication here 😃

magic helm Feb 9, 2018, 2:26 PM

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Are you in BP or C++?

gaunt crown Feb 9, 2018, 2:26 PM

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Bp

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C++ will take me a while :3

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I don’t wanna head into that for now, staying in BP

magic helm Feb 9, 2018, 2:27 PM

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K so I can't actually do it right now because I'm not at my computer... I can type out the steps(one moment)

gaunt crown Feb 9, 2018, 2:27 PM

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All g , cheers maan

magic helm Feb 9, 2018, 2:41 PM

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In Begin play, have an authority check. If it's remote then set the component that's suppose to simulate physics to NOT simulate physics while the authority version should. Then make a custom event that occurs on the client only and has a transform (or if you prefer location and rotation only) input parameter(s) and set the actors transform to that input parameter from there. Then in Tick do an authority check and only on the authority call that custom event that just sets the client versions transforms and input the servers transforms. Compile and test

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Also if you want to have less stuff happening on begin play, you could just not simulate physics by default and turn it on only on the authority(server)

gaunt crown Feb 9, 2018, 2:50 PM

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Ok thank you I’ll give it a try

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I’ll see if I can understand what you are talking about haha

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I’ll come back to you if I am stuck

fleet viper Feb 9, 2018, 3:07 PM

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Hi im pretty new to online programming and im wondering what means A before a gamemode or U before a world and also how big is the difference between online and offline programming?

magic helm Feb 9, 2018, 3:09 PM

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@fleet viper I would suggest learning a bit more about UE4 before going into trying to setup online play. Here is a link to the answer for the first question: https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Reference/Classes/index.html

Gameplay Classes

Reference to creating and implementing gameplay classes.

tall grove Feb 9, 2018, 3:13 PM

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@magic helm thanks forshare your strategy about phisycs multiplayer

magic helm Feb 9, 2018, 3:14 PM

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Yeh 😄 thats if you want it to be server authoratative, obviously the format would have to change a bit if you want it client authoratative and stuff

fleet viper Feb 9, 2018, 3:58 PM

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btw does anyone know how to disable the main menu in the shootergame sample?

twin juniper Feb 9, 2018, 4:04 PM

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@fleet viper there's a lot of UI stuff in the game instance

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all seems to be done with slate as it is pre UMG im guessing

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For generic damage from weapons in MP would you prefer an interface or a component based approach? Alternatively the stock ApplyPointDamage functions are an option but it would be a waste to call them on every hit actor instead of just the ones that could be damaged

fleet viper Feb 9, 2018, 4:26 PM

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@twin juniper can you show me how to disable it? working on it now for days and still nothing happended

twin juniper Feb 9, 2018, 4:26 PM

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Sorry I'm not familiar enough with it

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Building something on other peoples code will have lots of issues like this

fleet viper Feb 9, 2018, 4:28 PM

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no i will just change mesh maps and weapons thats all

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@twin juniper

twin juniper Feb 9, 2018, 4:29 PM

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Yes but if you need to do something custom, you won't be able to do it properly without understanding how it works, like this example

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You might be able to get away with using a new gameinstance, but then you'll have to ensure you know how to still open maps, start matches and properly init the game

thin stratus Feb 9, 2018, 7:03 PM

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Repinned my compendium so it's not somewhere at the bottom.
We should really start setting up a Wiki for UnrealSlackers with proper Tutorials for each channel and then just pin that

cunning stirrup Feb 9, 2018, 7:04 PM

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I can help with the writing

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I've done a tutorial on assimp

thin stratus Feb 9, 2018, 7:05 PM

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We will first do that from within the mod team and then look into opening it up for you peeps.
Otherwise we will attracked all kinds of trolls and spammers

cunning stirrup Feb 9, 2018, 7:05 PM

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ok

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kinda like an archive of requests that got answered ?

cedar galleon Feb 9, 2018, 7:59 PM

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Hi @everyone I have strange problem....When I play in the Editor the project work, delete the "instanced foliage" but when run "Standalone Game" or "Build Project" not work, not delete Instanced foliage from Map...Why? where is the problem? 😭

cunning stirrup Feb 9, 2018, 8:17 PM

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Show your code ?

graceful lynx Feb 9, 2018, 8:21 PM

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Anyone have any issue with FHttp on OSX specifically when dealing with headers passed back on a 302 response before the 200 response where it ends up?

real hound Feb 9, 2018, 8:54 PM

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Hi, I would like to ask if can I trust data in PlayerState when accessing it through gamemode(server)

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Because I'm now thinking where should I store player specific data like health, experience etc without worrying about protection

cedar galleon Feb 9, 2018, 9:00 PM

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@cunning stirrup this is code

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have solution?

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but in the editor work all

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with and without dedicated server enabled....

cunning stirrup Feb 9, 2018, 9:06 PM

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@cedar galleon You need to run thorugh the array in reverse order

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oh wait no

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try adding more debug

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maybe the collision isn't setup right

cedar galleon Feb 9, 2018, 9:07 PM

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but in the editor work...why in Standalone not work?

cunning stirrup Feb 9, 2018, 9:08 PM

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what does Remove Instance do ?

worthy wasp Feb 9, 2018, 9:09 PM

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When printstringing in a MP Standalone - is there anyway to log/see the output of SERVER ? It's hidden by default... cant ever get it to show 😦

cunning stirrup Feb 9, 2018, 9:09 PM

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yes

worthy wasp Feb 9, 2018, 9:09 PM

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i'm forced to test standalone because of steam implementation

cunning stirrup Feb 9, 2018, 9:09 PM

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use Developpement build

mild hull Feb 9, 2018, 9:10 PM

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when you start -log

worthy wasp Feb 9, 2018, 9:10 PM

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ok to my knowledge ti'm on Development build

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and how do you mean Mizuki? makin ga shortcut?

cedar galleon Feb 9, 2018, 9:10 PM

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wait wait I don tunderstand

worthy wasp Feb 9, 2018, 9:10 PM

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currently - i'm doing Rightclick on .uproject file & LAUNCH GAME

cedar galleon Feb 9, 2018, 9:10 PM

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what should I do?

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@worthy wasp not work same problem

worthy wasp Feb 9, 2018, 9:11 PM

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i'm sorry visualnotte - i'm not even talking to you.....

cedar galleon Feb 9, 2018, 9:12 PM

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oh

mild hull Feb 9, 2018, 9:12 PM

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create a bat file with "Path\UE4Editor.exe" "Name.uproject" /Game/ThirdPersonBP/Maps/ThirdPersonExampleMap?listen -game -log or a shortcut

worthy wasp Feb 9, 2018, 9:13 PM

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literally "Path\UE4Editor.exe" ? SysVariables should recognize this right?

mild hull Feb 9, 2018, 9:13 PM

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you could add it, otherwise needs full path to file

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the project file also needs full path..

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@cedar galleon i would add some prints, does your trace hit anything, is it even called, etc

cunning stirrup Feb 9, 2018, 9:15 PM

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@cedar galleon Show us the inside of the Remove Instance function, i think the issue comes from it

cedar galleon Feb 9, 2018, 9:15 PM

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@cunning stirrup yes! in the editor REMOVE instanced foliage

cunning stirrup Feb 9, 2018, 9:15 PM

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@mild hull I'm not the one asking it's visualnotte

cedar galleon Feb 9, 2018, 9:16 PM

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@cunning stirrup this function is default function Unreal Engine

mild hull Feb 9, 2018, 9:16 PM

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yeah i know

cunning stirrup Feb 9, 2018, 9:17 PM

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@cedar galleon I think you should make a list of the indexes that you need to remove, then in another loop, remove them all at once in reverse order

cedar galleon Feb 9, 2018, 9:18 PM

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same problem @cunning stirrup

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😦

cunning stirrup Feb 9, 2018, 9:19 PM

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add a print when you delete the foliage to see if the code even runs

cedar galleon Feb 9, 2018, 9:20 PM

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@cunning stirrup yes! in the array I have all instanced, but not remove

cunning stirrup Feb 9, 2018, 9:20 PM

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yes

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Are you sure your target is set correctly ?

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Have you tried using DestroyComponent ?

cedar galleon Feb 9, 2018, 9:22 PM

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why in the editor work?

cunning stirrup Feb 9, 2018, 9:22 PM

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idk tbh

cedar galleon Feb 9, 2018, 9:22 PM

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if the code not is correct not work

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but in the editor work well

cunning stirrup Feb 9, 2018, 9:22 PM

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look at the log

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maybe there's a warning

jolly siren Feb 9, 2018, 9:42 PM

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Does anyone know how to update session settings (map, gamemode, etc.) after doing a servertravel? In other words, the match ends and players vote on the next map and gamemode.

winged badger Feb 9, 2018, 9:45 PM

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why would you even need to update them, unless you're advertising for other players to join?

jolly siren Feb 9, 2018, 9:46 PM

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right, for late joiners

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just found UpdateSession, going to try that out

winged badger Feb 9, 2018, 9:46 PM

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AdvancedSessions?

jolly siren Feb 9, 2018, 9:47 PM

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no, but I will look through their code too

winged badger Feb 9, 2018, 9:47 PM

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you can just change the values in those key/value pairs that are under extra settings

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and have your UI properly present that to the late joiners

jolly siren Feb 9, 2018, 9:47 PM

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ahh okay I'll give that a go

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thank you

winged badger Feb 9, 2018, 9:48 PM

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(that was advanced sessions, haven't done default unreal)

jolly siren Feb 9, 2018, 9:48 PM

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no worries, I'm digging through advance sessions code now 😃

jolly siren Feb 9, 2018, 10:12 PM

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Any one coded a workaround to this yet? https://issues.unrealengine.com/issue/UE-44006

wraith hornet Feb 9, 2018, 10:27 PM

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hey guys I have a question that I posted on the forums but thought I would run by anyone here as I dont know how much visiblity these things get on the forums

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https://answers.unrealengine.com/questions/756711/gameinstance-to-level-to-gamemode.html

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the gist of it is that my GameMode is not picking up new players joining the Level

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and hence not triggering Pre/Post Login methods

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looking over the various multiplayer material everything "looks" like it's setup correctly and I am certainly able to see my players after they join just my g

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GameMode doesnt appear to be behaving as expected

thin stratus Feb 9, 2018, 10:32 PM

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@jolly siren isn't that related to how playersessions are registered?

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Actually

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Why is this steam related

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This is a call inside the session

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Thaz should work, and if not you can always increment and decrement on login and logout

jolly siren Feb 9, 2018, 10:34 PM

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I think it's only broken on steam. I know it's at least only broken on dedicated servers.

thin stratus Feb 9, 2018, 10:34 PM

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I know that the session result shoes 0 players

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But the ingame call?

jolly siren Feb 9, 2018, 10:35 PM

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Ahh I haven't tested it in game, I'm debugging the session stuff. But yeah it looks like this specific bug is an in game call

thin stratus Feb 9, 2018, 10:35 PM

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The bug you posted

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Says GetCurrentPlayers

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That's for people that joined already or not

jolly siren Feb 9, 2018, 10:36 PM

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Essentially it's the same thing as the session stuff tho

thin stratus Feb 9, 2018, 10:36 PM

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Maybe it's related to the session

jolly siren Feb 9, 2018, 10:36 PM

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return Result.OnlineResult.Session.SessionSettings.NumPublicConnections - Result.OnlineResult.Session.NumOpenPublicConnections;

thin stratus Feb 9, 2018, 10:36 PM

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Yeah

jolly siren Feb 9, 2018, 10:36 PM

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It's using the same variables

thin stratus Feb 9, 2018, 10:36 PM

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NumOpen is updated

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Guess it's not

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Check where they Update the session after joining

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Registerplayer or something like that

jolly siren Feb 9, 2018, 10:37 PM

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right, yeah there are 2 bugs open around this. And one is won't fix and the other backlogged

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https://issues.unrealengine.com/issue/UE-45381

thin stratus Feb 9, 2018, 10:37 PM

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That has a fix though

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The one you just linked

jolly siren Feb 9, 2018, 10:37 PM

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a target fix?

thin stratus Feb 9, 2018, 10:38 PM

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4.19 is kinda releasing soon

jolly siren Feb 9, 2018, 10:38 PM

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right, but it's also set to won't fix

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so idk if it was actually fixed

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there isn't a commit attached to it

thin stratus Feb 9, 2018, 10:38 PM

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Hm can you see the code?

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Mäh

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Well then idk

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Can only look into how UE4 handles telling steam about the new player

jolly siren Feb 9, 2018, 10:41 PM

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yeah I don't see anywhere that NumOpenPublicConnections is incremented

thin stratus Feb 9, 2018, 10:41 PM

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Na that's filled by getting session info from steam

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There needs to be a call to the subsystem for when a player successfully joins

jolly siren Feb 9, 2018, 10:42 PM

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okay yeah that makes sense

thin stratus Feb 9, 2018, 10:42 PM

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That's handled somewhere in the subsystem

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Worth starting either in the session interface searching for player register stuff or for login /post login

jolly siren Feb 9, 2018, 10:44 PM

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Ahh yeah it uses m_nPlayers from the steam api

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which always returns 0

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I'm guessing it's because the players are never actually authenticated

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And if that is the case it makes sense that the bugs were backlogged

thin stratus Feb 9, 2018, 10:55 PM

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Yeah cause ue4 doesn't handle authentication to steam at all atm :D

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Not that it's hard to add as you have the steamapi at hand if needed

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Only annoying if you want to adjust the subsystem

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Event though that's a plugin now

jolly siren Feb 9, 2018, 10:57 PM

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Right, yeah wish steam stuff was on the roadmap. Some day maybe 😢

winged badger Feb 9, 2018, 11:19 PM

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GetNumPlayers() from GameModeBase?

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it will return the number of PCs

wary willow Feb 9, 2018, 11:43 PM

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@jolly siren yea that steam authentication is real simple

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I even have a tutorial

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https://www.youtube.com/watch?v=4CgeAxiS19s

YouTube

Victor Burgos Games

How to Get Steam Session Ticket

This tutorial is for those that use a backend service (usually a plugin), such as GameSparks or PlayFab and want to get Steam Authentication working in Bluep...

▶ Play video

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It was so I could use it for GameSparks, but I think they finally added the proper node to their plugin

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(after seeing this)

thin stratus Feb 9, 2018, 11:54 PM

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That's only getting the ticket or? @wary willow

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Authentication is usually to make sure the player owns the game

wary willow Feb 9, 2018, 11:55 PM

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oops

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My bad

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I thought I got authentication there

thin stratus Feb 9, 2018, 11:55 PM

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Na, it's for making sure that the game is run through steam + registering sessions when a player joins a server

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Basically what that old crashy pr added

jolly siren Feb 10, 2018, 2:14 AM

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Yeah that pr was a mess

twin juniper Feb 10, 2018, 2:48 AM

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I don't think this is the correct channel but anyone knows how to setup steam achievements

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Also I bought the steam sub configuration plugin if that makes it easy..

wary willow Feb 10, 2018, 3:15 AM

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@twin juniper oldie but goodie https://www.youtube.com/watch?v=ATdkoeSJ2WA

YouTube

Twiz

Unreal Engine 4 Tutorial - Steam Achievements

In this video I show you how to setup the Steamworks SDK for UE4 and then create Steam Achievements. Links: Main Code: http://pastebin.com/TzFvwyXh Achieveme...

▶ Play video

twin juniper Feb 10, 2018, 3:15 AM

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Thanks A lot man !

cobalt whale Feb 10, 2018, 3:53 AM

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Is there a way to call function just for one specific client? Not multicasting it to each client.

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I have 1 client who shot 2 client and I need to shake screen only for that 2 client

fossil spoke Feb 10, 2018, 4:34 AM

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Just RPC to that client?

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ServerToClient RPC

cobalt whale Feb 10, 2018, 4:57 AM

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I raytracing from my client weapon to another character
Store this character to variable and pass it to server function
This server function should call desired screen shaking function at the character who got shot
It's all working fine, but only for listened server and not for client

📎 s1.PNG

fossil spoke Feb 10, 2018, 5:20 AM

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Why not just use the Damage Events to determine when to Shake the camera?

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These are already replicated for you.

cobalt whale Feb 10, 2018, 5:21 AM

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Just want to know how to call client to client function if I need that in future

fossil spoke Feb 10, 2018, 5:44 AM

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You cant.

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You need to go through the Server to communicate with other clients

cobalt whale Feb 10, 2018, 5:46 AM

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I know that, but in my case even going through server didn't fixes the thing

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What i meant is how to call server function that calls client function for a specific client

winter zenith Feb 10, 2018, 7:10 AM

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Tryint to get an idea for a best practice here and for the life of me I'm having trouble finding a good approach. Setting a players name when they've connected to a server. I've got a player name input on the main menu, so I've already captured the name. I feel that the process is something like storing that value someone (either sending it through using options ,but then how to access that later?) and then populate it on the PlayerController, which the server can then read during PostLogin. Would anyone be able to give a quick couple of line outline of the high level process (and then I can certainly go and work out the specifics), just where things should be stored and then transferred at what points - thanks! 😃

winter zenith Feb 10, 2018, 8:45 AM

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Ok - I've just found that GameModeBase::Login receives Options, which is fantastic - I think I can go that route to get it working happily

thin stratus Feb 10, 2018, 8:48 AM

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@winter zenith Yeah Login is good for getting options and giving them to the playercontroller

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However passing ?Name= might internally already set the playerstate playername

winter zenith Feb 10, 2018, 8:49 AM

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hah. you know I never even tried to do that, I might give that a go

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yep - literally just searched the engine for ParseOption(Options, TEXT("Name")) and found it happening in GameModeBase like you mentioned

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thanks - seems that I was overcomplicating things for naught

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though good to know about Login for other non-standard things I might want to pass along on a non-seamless travel 👍

thin stratus Feb 10, 2018, 9:14 AM

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Yeah i pass player ids from ThirdParty services like gamesparks with this

cedar galleon Feb 10, 2018, 1:37 PM

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@thin stratus hey bro, can help....I have strange problem....When I play in the Editor the project work, delete the "instanced foliage" but when run "Standalone Game" or "Build Project" not work, not delete Instanced foliage from Map...Why? where is the problem? 😭

harsh sable Feb 10, 2018, 1:44 PM

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Does anybody know what would make a game slow down in terms of polycount? I'm trying to find out what the limit of polycount should be for the 3D models on a project I'm working on (and working with others on). For a game like a low-poly version of, say, GTA4 or Blade and Soul, you might have many characters running around at once. Does anybody know any information about this?

#

Please @ me if you do.

vernal thistle Feb 10, 2018, 1:50 PM

#

Hey , I'm having an issue with replicating damage consistently from server to client. At the moment, the way my damage works is it gets a damage integer variable , multiplies it by a random float in range of 1 to 1.25 and sets a new "damage modified" variable then decreases the health of the hit actor based on that damage modified. The issue I'm running into is that the server and client are both generating different random floats so the damage is different for both

winter plover Feb 10, 2018, 2:31 PM

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calculate the damage only serverside

#

and then pass on the final value

#

is this purely for client display too?

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because if you are already replicating health there isnt really a strict need to pass on specific damage

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unless you wanna give the player feedback
@vernal thistle

jolly siren Feb 10, 2018, 2:33 PM

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@harsh sable wrong channel. Try #ue4-general or #graphics

winter plover Feb 10, 2018, 2:35 PM

#

Also got a quick q myself, how much is the playercontroller input replicated by default?

#

if at all

#

I am trying to get my FPS controls done a bit less hacky and would like to know about that

#

So far I have just manually rotated the player camera and passed on an RPC instead of using controller input

#

is that adequate or is there a better way?

jolly siren Feb 10, 2018, 2:38 PM

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Normally you use AddControllerPitchInput and AddControllerYawInput

winter plover Feb 10, 2018, 2:38 PM

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does the server receive those automatically?

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I know that Yaw input makes the character move by default

jolly siren Feb 10, 2018, 2:39 PM

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yep

winter plover Feb 10, 2018, 2:39 PM

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but I think that's due to the movement component

jolly siren Feb 10, 2018, 2:39 PM

#

ahh are you not using character movement comp?

winter plover Feb 10, 2018, 2:39 PM

#

I am for yaw movement

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but camera pitch input is causing some trouble rn

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or some worries rather

#

what I did before was, manually rotate camera-> RPC to server -> replicate camera back

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which on an actual network connection caused some ugly rubberbanding

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but only for pitch movement

#

so far all I did was remove the last step

#

and that seemed to help with the rubber banding

#

but idk is there a "proper" way to do this?

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Like are the controller inputs already automatically replicated, so that I can just derive stuff from them?

jolly siren Feb 10, 2018, 2:43 PM

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Have you looked at shootergame? They just use the 2 functions I referenced and everything is taken care of. They use character movement comp fully tho as well.

winter plover Feb 10, 2018, 2:44 PM

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does it work with networking too?

jolly siren Feb 10, 2018, 2:44 PM

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yes of course

winter plover Feb 10, 2018, 2:44 PM

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mhmm k ill take a look at it

sterile pebble Feb 10, 2018, 6:44 PM

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@winter plover did you know about aimviewrotation?

#

this is internal pawn variable which is replicated

winter plover Feb 10, 2018, 6:45 PM

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I actually didnt

sterile pebble Feb 10, 2018, 6:47 PM

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take a look at shootergame example, there is method inside player character to get rotation values. Works pretty nice and you dont need to code anything. I would like to give you direct reference, but I dont have example on hard drive..

winter plover Feb 10, 2018, 6:48 PM

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ill try to

faint fable Feb 10, 2018, 11:27 PM

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Anyone here that has been messing around with Clientside navigation ? Any lessons learnd ? My project is a peer to peer multiplayer with some AI features. It runs right now with replicated movement on the Tank ai that i have. Do i save myself alot of network load by doing Clientside navigation and setting replicated movement to false ?

winter zenith Feb 11, 2018, 2:20 AM

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Question - Is there an accepted/best-practices way to reference players genreally in networked games. Right now I'm passing around PlayerStates (or PlayerId, which I'll then use to find the relevant PlayerState), it seems ok but I don't want to dig in too deep if there's a more practical way. Thanks!

fossil spoke Feb 11, 2018, 3:40 AM

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Passing PlayerID is ideal.

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@winter zenith

winter zenith Feb 11, 2018, 3:44 AM

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@fossil spoke good to hear, thanks 😃

thin stratus Feb 11, 2018, 9:01 AM

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In C++ you'd also have the FUniqueNetId.

#

That's mapped to the Subsystem you use and would also be valid outside of the session or after a map change

#

In case that's ever needed

#

Of course that needs a Subsystem with Accounts (like Steam)

manic pine Feb 11, 2018, 1:21 PM

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does uworld trigger some kind of event/repnotify for when gamestate is replicated?

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hmm nvm, apparently gamestate registers itself with world on construction

gleaming bobcat Feb 11, 2018, 4:48 PM

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Anybody know what is happening /

winged badger Feb 11, 2018, 4:51 PM

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no, but you'd probably have better luck in #packaging

gleaming bobcat Feb 11, 2018, 4:55 PM

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Ah I got it thanks :0

twin juniper Feb 11, 2018, 6:10 PM

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@thin stratus has epic fixed steam auth yet

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been broken since ive started using this engine almost 9 months ago lol

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if its still broken i think that's a tell that they dont care lol

thin stratus Feb 11, 2018, 6:21 PM

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It's not "Broken"

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It's simply not implemented

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And no, they didn't add that/fix that

twin juniper Feb 11, 2018, 6:24 PM

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Yeah

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I was just wondering

runic hamlet Feb 11, 2018, 7:42 PM

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assuming I have 60+ players online and I want to send a chat message filtered based on both location and team, which solution uses less overhead: A) performing a loop on the players and filtering messages then sending them individually, or B) sending a multicast to all players and letting the clients filter which ones they should use?

#

is there a way to filter a multicast to only specific clients?

manic pine Feb 11, 2018, 7:52 PM

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been wondering a bit about that myself... not the cheapness of it; filtering yourself should be a lot cheaper

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but the disadvantage is you have to make it a playercontroller/state function,

#

would be nice with an RPC-type where you could input a player/playercontroller... so it calls the rpc on a replicated object, but only for that net connection

hidden thorn Feb 11, 2018, 7:58 PM

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When using sessions if I set like the server name
SessionSettings->Set("ServerName", MainMenuWidget->GetHostServerWidget()->GetServerName(), EOnlineDataAdvertisementType::ViaOnlineService);

#

How can I get the value?

#

I found SessionSettings-Get but I am not 100% sure how to use it

thin stratus Feb 11, 2018, 8:01 PM

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When you retrieve a session

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You can get the setting by parsing in the used key "ServerName" and a FString variable that will hold it

runic hamlet Feb 11, 2018, 8:16 PM

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@manic pine yeah, selecting individual players would be nice :\

manic pine Feb 11, 2018, 8:18 PM

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well, a Client rpc to an object a specific player owns will do an individual call

thin stratus Feb 11, 2018, 8:18 PM

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Well tbh, in the cases where you would need to aim at a non owning client of an actor, you usually have some sort of reference to him anyway

manic pine Feb 11, 2018, 8:18 PM

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but the only default objects you have to work with is PC and PS

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yeah ced, but for cases where you want to do e.g. something to an actor not owned by the player... but not a multicast

thin stratus Feb 11, 2018, 8:19 PM

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As said, usually you have some sort of reference to that one

manic pine Feb 11, 2018, 8:20 PM

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well the reference isnt the problem per se

#

but you have to multicast it, or run the function on something else

thin stratus Feb 11, 2018, 8:20 PM

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Depends

manic pine Feb 11, 2018, 8:21 PM

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e.g. you want to do something visually to player1's pawn, but only for player2

thin stratus Feb 11, 2018, 8:21 PM

#

It's also possible to just handle on the client that overlapped/was traced etc

#

Gimme an example where you would need to target a specific client instance of an actor from server side

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One the client doesn't own obv

#

I mean, I can see it for example for a chest that a player uses

#

Where everyone can access it and you want to only update the ui of the player who uses it

#

But then you can always go via a ManagerComponent on the PC

manic pine Feb 11, 2018, 8:25 PM

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yeah, there are ways to do anything, though i guess this option could potentially save some workaround

thin stratus Feb 11, 2018, 8:25 PM

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Yeah but how do you send the RPC to an Actor instance that the client doesn't own

manic pine Feb 11, 2018, 8:25 PM

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you see the point though yeah, like e.g. server calls player1spawn->ClientDoSomething(player2, args...);

thin stratus Feb 11, 2018, 8:25 PM

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That would probably, in the back, go the same way of using the PC

manic pine Feb 11, 2018, 8:26 PM

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player1'pawn

#

so the rpc is carried out on that object, but only for player2's instance of that object

#

it would really just be like a targeted Client RPC

#

whereas the current one only targets object's owner

#

if you wanted to achieve that effect with the existing system, you'd have to do something like player2PC->dosomethingtopawn(player1pawn);

thin stratus Feb 11, 2018, 8:30 PM

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I don't think the connection of each players is saved in an actor, is it?

#

I doubt you can, currently, actually ask "Gimme the Actor instance of Player X"

manic pine Feb 11, 2018, 8:31 PM

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well top actor owner is player controller which ahs net connection

#

it would be like temporarily changing owner of object to another pc

thin stratus Feb 11, 2018, 8:32 PM

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Yeah, but despite the owner there is no way to find a "route" towards a specific instance

#

Server would constantly need to know who has what instance

manic pine Feb 11, 2018, 8:32 PM

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there should be, i think all the channels are stored in net connection for every single actor

thin stratus Feb 11, 2018, 8:32 PM

#

Well then okay

manic pine Feb 11, 2018, 8:32 PM

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so e.g. it would look at PC, find net connection, find channel for this specific actor, then run the rpc on that

thin stratus Feb 11, 2018, 8:33 PM

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It might be that we just don't see how difficult it is?

manic pine Feb 11, 2018, 8:33 PM

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yeah its possible... or maybe theyve just never needed?

thin stratus Feb 11, 2018, 8:33 PM

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Well as said, most times you are totally fine with owning, server and multicast RPC

manic pine Feb 11, 2018, 8:33 PM

#

yeah, to be honest i kinda struggle coming up with examples where it would be very useful

#

but it could be a nice convenience feature for those few cases

thin stratus Feb 11, 2018, 8:34 PM

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e.g. a chest inventory

#

where you only target player sthat are using it

#

That is one usecase

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If you have 30 players, you don't want to multicast a possible UI update

manic pine Feb 11, 2018, 8:35 PM

#

yeah, the workarounds can get nasty if you have to resort to multicast and filter out on the client side, or re-route it through PC/PS

#

hmm maybe its possible to turn it into a feature request somewhere

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im thinking either its very hard to do, which is why it doesnt exist, or its very simple to do and they just havent thought about it

twin juniper Feb 11, 2018, 8:53 PM

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https://i.imgur.com/siidyhX.png

Imgur

#

how do i replicate this animation

#

I have a door that opens and closes but its not moving the collision for some reason

#

any ideas?

#

lol

thin stratus Feb 11, 2018, 9:01 PM

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Call it on everyone?

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(Multicast)

twin juniper Feb 11, 2018, 9:02 PM

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@thin stratus tried to

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didnt seem to do anything sadly

thin stratus Feb 11, 2018, 9:03 PM

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Is that a replicated actor and you are on the server?

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Playing that in a multicast 100% should play the anim on all instances

twin juniper Feb 11, 2018, 9:04 PM

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ok i think im an idiot let me see

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i forgot to set bReplicates = true lel

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i believe

#

ill try

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Nope lol

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@thin stratus its playing the animation but not doing the collision removal

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So I cant walk through the door lol

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because it keeps bumping me back out

thin stratus Feb 11, 2018, 9:06 PM

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I don#t see any node that should deal with collision removal

#

Is the collision properly applied to the correct bones?

twin juniper Feb 11, 2018, 9:07 PM

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yeah

thin stratus Feb 11, 2018, 9:07 PM

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Is the collision working for the server?

twin juniper Feb 11, 2018, 9:07 PM

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when i set it to "No Collision" for example

#

im able to walk through

thin stratus Feb 11, 2018, 9:08 PM

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I assume the collision isn't moving

#

You might want to show the collision ingame

#

There should be a console command for that

#

And check if it's moving along or not

twin juniper Feb 11, 2018, 9:09 PM

#

https://i.imgur.com/8dGe2rK.png

Imgur

#

https://i.imgur.com/pn2C7Yo.png

Imgur

#

and when its opened

#

it goes up lol

#

the collison is the green

thin stratus Feb 11, 2018, 9:10 PM

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Well

#

Then it shouldn't block

#

Are you use you fit below that?

twin juniper Feb 11, 2018, 9:10 PM

#

yeah

#

lol

thin stratus Feb 11, 2018, 9:10 PM

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Then idk, maybe something else blocking?

#

Is that Server view?

twin juniper Feb 11, 2018, 9:10 PM

#

https://i.imgur.com/VENysqT.png

Imgur

#

because when i crouch

#

the capsule gets shrunk,

#

lol

#

I dont know wh at it could be caused by lmao

thin stratus Feb 11, 2018, 9:11 PM

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OnHit / On Overlap

#

Check what's blocking it

twin juniper Feb 11, 2018, 9:14 PM

#

https://i.imgur.com/qexejDW.png

Imgur

#

Well its the skeletal mesh component

#

of my garage door

#

i think ihave a workaround

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just set the collision to no collision after the animation finishes

manic pine Feb 11, 2018, 9:16 PM

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maybe its not opening on the server

#

you need the tickpose thing activated on dedicated for that ye

twin juniper Feb 11, 2018, 9:17 PM

#

@manic pine how do i enable that?

#

you mean this ? https://i.imgur.com/OpyMb5Y.png

Imgur

#

i have it set to always lol

manic pine Feb 11, 2018, 9:18 PM

#

GetMesh()->MeshComponentUpdateFlag = EMeshComponentUpdateFlag::AlwaysTickPoseAndRefreshBones;

#

and refresh bones?

#

be careful about using it though, if you do it for a lot of meshes with animation(and you dont technically need it), you could be wasting a lot of cpu power on the server

twin juniper Feb 11, 2018, 9:19 PM

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@manic pine could i toggle it on and off

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based on if a player is within a collider?

#

i think that could be a good solution

#

(assuming this works)

#

ok it worked

#

lolol

manic pine Feb 11, 2018, 9:20 PM

#

are you using that on every single mesh in the game?

twin juniper Feb 11, 2018, 9:20 PM

#

now i need to know if i can optimize it by toggling based on a collider

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no no

manic pine Feb 11, 2018, 9:20 PM

#

what about your characters and monsters

twin juniper Feb 11, 2018, 9:20 PM

#

lol

#

let me see

#

the character

#

is always tick pose

#

lol

manic pine Feb 11, 2018, 9:20 PM

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what about your countless animals

twin juniper Feb 11, 2018, 9:21 PM

#

but i think the NPCs

#

arent

#

idk tho

#

why do u ask

manic pine Feb 11, 2018, 9:21 PM

#

didnt you have some server performance problems with weird physics in the profiler

#

well anyway, make sure its disabled unless you know you need it

#

unless youre doing e.g. lag compensation for hitboxes and such, or stuff like your door here, its generally a waste to tick pose/bones on dedicated server

twin juniper Feb 11, 2018, 9:23 PM

#

mhm

#

but ithink it might be possible

#

to toggle it

#

📎 unknown.png

#

like tihs

#

when we open, enable it, then play animation

manic pine Feb 11, 2018, 9:23 PM

#

it might, just a bit unsure how its gonna refresh

twin juniper Feb 11, 2018, 9:23 PM

#

when we close, play aniamtion, then close

#

make sense? lol

manic pine Feb 11, 2018, 9:24 PM

#

yeah

#

just debug it thoroughly

#

could end up weird if, in the middle of opening/closing the thing, a player leaves the area and it stops refreshing

#

what happens at that point

#

then what happens when a player enters again

#

stuff like that

twin juniper Feb 11, 2018, 9:25 PM

#

i tried lol

#

set it by default to use

#

"Only tick pose when Rendered"

#

and then in my multicast i did the above

#

and it still lets me through now

#

so it sounds like u can set it

manic pine Feb 11, 2018, 9:25 PM

#

well, 'when rendered' wouldnt work since dedi doesnt render

twin juniper Feb 11, 2018, 9:25 PM

#

exactly

manic pine Feb 11, 2018, 9:26 PM

#

and it certainly doesnt render client's POV

twin juniper Feb 11, 2018, 9:26 PM

#

but i set it to Always tick pose when u enter the door area

#

and the collision issue is still resolved

#

lol

#

@manic pine is this really the only solution tho

#

i feel like its kind of a bad one lol

manic pine Feb 11, 2018, 9:27 PM

#

ye i think its a bad option

twin juniper Feb 11, 2018, 9:28 PM

#

i mean it works...

manic pine Feb 11, 2018, 9:28 PM

#

i'd just give the door a single collider, e.g. a rectangle, and enable/disable it upon opening

#

much more performant

twin juniper Feb 11, 2018, 9:28 PM

#

so essentially

#

the door itself wouldnt be in charge

#

of collision

manic pine Feb 11, 2018, 9:29 PM

#

well it would

#

Door->OpenDoor();

#

inside which you'd disable collision

#

then you'd make a replicated boolean or something, with an OnRep_DoorState

#

if(open)disablecollision

#

for clients

twin juniper Feb 11, 2018, 9:30 PM

#

yea

mild hull Feb 11, 2018, 9:30 PM

#

cant you use the moving collision on client and the simple on server?

twin juniper Feb 11, 2018, 9:30 PM

#

i need it to only disable collision

#

when the animation finishes

#

not WHEN enter

#

OnEnter

#

but instead

#

OnAnimationFinish

manic pine Feb 11, 2018, 9:31 PM

#

what mizuki says is possible, but im always wary of moving colliders...

#

i have bad experiences where they suddenly throw your character miles awaay

twin juniper Feb 11, 2018, 9:31 PM

#

^

#

same lel

mild hull Feb 11, 2018, 9:33 PM

#

thats why automatic doors have safety functions :D

manic pine Feb 11, 2018, 9:33 PM

#

haha yeah, epic forgot to include that

#

how about an enum of some kind with Open, Opening, Closing, Closed

#

when opendoor is called, start opening animation and set state to opening

#

animation finishes, state changes to open, etc.

#

state is replicated with repnotify, so clients can respond by playing animations and/or setting their colliders on off

twin juniper Feb 11, 2018, 9:35 PM

#

i still am not sure if i understand rep notify lel

#

if i connect to the game late

#

do i get the notify

mild hull Feb 11, 2018, 9:36 PM

#

when the var is relevant to you, than you get a update and whenever you get update the function runs

manic pine Feb 11, 2018, 9:36 PM

#

and yeah, its sent on the initial bunch as well

#

so late clients will get current server state

#

the only potential problem with using repnotify is if youre doing listenserver too

#

cuz they wont be called for the player on the listenserver, since it doesnt receive notifications

#

since nothing was replicated

twin juniper Feb 11, 2018, 9:38 PM

#

heres another thing

#

why can i not remove a replicated actor, on my client only when calling a client rpc

#

very strange imo

manic pine Feb 11, 2018, 9:39 PM

#

because destroy checks hasauthority

twin juniper Feb 11, 2018, 9:39 PM

#

is there no bypass

#

lol

#

so u can delete

#

just on client side

manic pine Feb 11, 2018, 9:39 PM

#

not without doing some really ugly stuff

mild hull Feb 11, 2018, 9:39 PM

#

dont render it?

twin juniper Feb 11, 2018, 9:39 PM

#

hm

manic pine Feb 11, 2018, 9:39 PM

#

disabling its client tick and hiding it is the preferred option ye

#

but then you have to be careful with potential multicasts it could receive etc.

twin juniper Feb 11, 2018, 9:41 PM

#

https://i.imgur.com/vvbTQQB.png

Imgur

#

is there no way of like

#

knowing when this animation finished playing?

#

im just wondering lol

thin stratus Feb 11, 2018, 9:42 PM

#

Use a montage

mild hull Feb 11, 2018, 9:42 PM

#

not sure if its exposed but the animation assets should have a length

jolly siren Feb 11, 2018, 9:50 PM

#

Anyone know how to get the region a server is within?

fossil spoke Feb 11, 2018, 9:52 PM

#

You would probably need to classify them yourself. I dont know of any built in method that would have that type of data on hand.

jolly siren Feb 11, 2018, 9:56 PM

#

Okay, yeah I wanted to display server regions in the ui

hidden thorn Feb 11, 2018, 9:59 PM

#

What do these 2 settings mean more specifically

#

SessionSettings->bShouldAdvertise = false;
SessionSettings->bAllowJoinViaPresence = false;

thin stratus Feb 11, 2018, 10:30 PM

#

bShouldAdvertise -> Should this Session be listed in Session Searches

#

bAllowJoinViaPresence -> Should other be able to join this session through Presence

#

Presence Basically everything that to do with the player. Groups, Friends, etc. (afaik)

hidden thorn Feb 11, 2018, 10:40 PM

#

Ah ok

#

Thanks for the explanation

fresh saddle Feb 12, 2018, 3:36 AM

#

Has anyone had any luck in using Advanced Session Plugins for Voice Muting? Seem to be having issue when trying to fake proximity chat by muting and unmuting players based on distance. Currently I'm executing it on Client only, should it be run on Server instead? Not sure. Lemme know

junior tree Feb 12, 2018, 11:58 AM

#

how would one go about implementing crossplay across pc, xbox, ps4 etc?

#

anything I google yields player guides on activating fornite crossplay in the options

loud mountain Feb 12, 2018, 11:59 AM

#

hmm I never programmed on a console, but Isn't it "just" connecting to the same server and done? As long as it is a public ip?

junior tree Feb 12, 2018, 12:03 PM

#

should be, but not many games support crossplay, plus I would not know how you can match together players from the PSN and the Xbox Live subsystems

#

I mean, Monster hunter devs stated that the delayed pc launch is due to them having to implement matchmaking and stuff while on consoles you have their own systems

#

so I guess it wouldn't be that easy

bitter oriole Feb 12, 2018, 12:05 PM

#

It's more complicated than that

#

Some (haven't used all) consoles require your game servers to talk with their own

#

Some (think Sony) appear to require that they don't talk to others

#

And PC/Console crossplay is generally frowned upon, because PC has much more cheating, and because mouse + keyboard is often more competitive than gamepad

#

Matchmaking specifically is handled by the console developer, not you

mild hull Feb 12, 2018, 12:08 PM

#

yeah but any build can connect to the same server, its mostly rules and matchmaking/session finding that hinders you

bitter oriole Feb 12, 2018, 12:09 PM

#

Depends on your game, but yes, the red tape and online services are the most obvious blockers

junior tree Feb 12, 2018, 12:10 PM

#

it's a shame for non mainstream competitive games like tooth and tail

#

(that one actually has crossplay, or at least it's planned)

#

when you need a critical mass of users splitting the community per console makes no sense

bitter oriole Feb 12, 2018, 12:11 PM

#

PC / XBox can happen these days, for what it's worth

#

Sony has a 70M install base, most games on the platform are going to have at least dozens of hundreds of players

#

They don't need or want crossplay

loud mountain Feb 12, 2018, 12:12 PM

#

in rocket league you can matchmake with or against PS4 players

bitter oriole Feb 12, 2018, 12:12 PM

#

Not yet IIRC

loud mountain Feb 12, 2018, 12:12 PM

#

and don't forget portal 2 with which you could play ps3/pc coop

verbal wave Feb 12, 2018, 12:13 PM

#

and final fantasy xiv has PS4/PC crossplay

junior tree Feb 12, 2018, 12:13 PM

#

I don't think a huge install base justifies no crossplay. Some niche games are going to be used by 0.0001% of the players or so, which they need to be online at the same time for play to happen (think of battle royale games)

loud mountain Feb 12, 2018, 12:13 PM

#

but of course they can sell more consoles, if you lock player groups on one system

mild hull Feb 12, 2018, 12:13 PM

#

didnt fortnine accidentally allow cross play 3 times?

bitter oriole Feb 12, 2018, 12:14 PM

#

The larger point I'm making is that you don't get to decide, you can only ask permission. Getting your game on consoles isn't granted and there are rules, that might or not be stretched depending on your game

#

Rocket League or Final Fantasy can get to bend the rules

verbal wave Feb 12, 2018, 12:16 PM

#

Doesn't mean we shouldn't complain about it as devs. We should always complain. Crossplay almost has no downside for most non-FPS games.

#

but I gotcha

bitter oriole Feb 12, 2018, 12:16 PM

#

If crossplay has value for your game you should definitely ask about it

#

Just pointing out it doesn't always has value / is possible

mild hull Feb 12, 2018, 12:17 PM

#

dont forget RTS

verbal wave Feb 12, 2018, 12:17 PM

#

how about Switch? It's relatively new and doesn't have a lot of info

loud mountain Feb 12, 2018, 12:17 PM

#

Minecraft is or is coming crossplay on Switch, right?

verbal wave Feb 12, 2018, 12:17 PM

#

I want starcraft 2 on switch wink

junior tree Feb 12, 2018, 12:18 PM

#

thanks for the info, now I know it's not entirely up to the dev to allow crossplay

verbal wave Feb 12, 2018, 12:18 PM

#

for now I'm stuck with

📎 latest.png

bitter oriole Feb 12, 2018, 12:19 PM

#

@junior tree Just don't go around announcing crossplay for your game before you have the greenlight from Sony is what I'm saying 😛

#

That goes for anything console-related really

junior tree Feb 12, 2018, 12:20 PM

#

sure

verbal wave Feb 12, 2018, 12:20 PM

#

thanks for the talk

eternal anchor Feb 12, 2018, 12:33 PM

#

annouce crossplay between xbox and PC (;

manic pine Feb 12, 2018, 1:24 PM

#

does anyone have experience with stamina systems for extra run speed in mp?

#

im struggling finding a decent solution that doesnt cause movement errors at low stamina levels, when deltatime differences on server/client causes stamina level disagreement

gaunt crown Feb 12, 2018, 1:33 PM

#

New to the whole multiplayer side. So noobi questions.

#

📎 unknown.png

#

Any reason why this doesnt work on Dedi? The Cast fails on Dedi but On SP it works perfectly and casts through.

manic pine Feb 12, 2018, 1:35 PM

#

if its running on a client of the dedicated server, its gonna fail due to gamemode not being available

gaunt crown Feb 12, 2018, 1:36 PM

#

Ah okay

#

So how would I fix that?

#

Place on another BP?

#

Like maybe the Client itself?

manic pine Feb 12, 2018, 1:36 PM

#

only the server instance has access to gamemode

#

the server controls the 'rules' of the game

gaunt crown Feb 12, 2018, 1:36 PM

#

Ah aight

#

Yeah I got a widget that does a timer to all clients for the countdown of the match

#

So I might aswell make it client widget only

#

No Gamemode needed

manic pine Feb 12, 2018, 1:37 PM

#

could do that, or if you want the gamemode to control it you could have gamemode(from server) send the countdown to clients

gaunt crown Feb 12, 2018, 1:38 PM

#

I mean what's less resource heavy?

#

Running it on clients obviously 😄

#

So I might aswell

manic pine Feb 12, 2018, 1:38 PM

#

yeah, depends on your needs and the effect of the timer etc., how susceptible it is to hacking and more

gaunt crown Feb 12, 2018, 1:39 PM

#

Ah right

#

By the way, I have another issue if you could help me with

#

I hope I can figure it out tonight 😄 but heres a vid

#

Wait wrong vid

#

https://www.youtube.com/watch?v=-jOG95PhmIY

YouTube

Biggumzzz

2018 02 09 21 44 00

▶ Play video

#

There

#

Ive tried replicating ways that another person helped me with and it didnt work.

manic pine Feb 12, 2018, 1:40 PM

#

oh no, not replicated physics

gaunt crown Feb 12, 2018, 1:40 PM

#

:3

#

Is there a better way of making a golf game then?

#

If its bad that way xD

manic pine Feb 12, 2018, 1:41 PM

#

replicated physics is a complete mess

#

really the only decent approach is to make it yourself, not as a physics implementation but as

gaunt crown Feb 12, 2018, 1:41 PM

#

Wonder how many Golf Games did it in UE

manic pine Feb 12, 2018, 1:41 PM

#

movement component

gaunt crown Feb 12, 2018, 1:41 PM

#

Ah,

manic pine Feb 12, 2018, 1:41 PM

#

but thats a ton of work to do properly.... hmm

#

you could try using the projectile movement component that already exists

#

i havent used it too much so im not completely sure how good it is

#

but i'd expect it to be a lot better than just doing replicated physics

#

it supports bouncing, so it should be pretty close... but how well it's simulated on clients ive no idea

gaunt crown Feb 12, 2018, 1:44 PM

#

All g

#

I will have to think of something 😦

#

My Golf game has only been in the works for a few days so all good.

worthy wasp Feb 12, 2018, 3:35 PM

#

I"m getting connection timeouts - cant execute this command.... is it even valid? I have a need to change the GameMode for a given map - each map supports different gamemode types.... due to the fact that HostGame works this way with the URL..... i was thinking i could do the same thing with ServerTravel?

ExecuteConsoleCommand:
servertravel MapName?Game=GameModeAlias?listen

thin stratus Feb 12, 2018, 3:56 PM

#

@gaunt crown please read my compendium if you are new to networking

#

It covers common things like which class is available where

#

The compendium is pinned to this channel

#

@worthy wasp should be valid

gaunt crown Feb 12, 2018, 4:00 PM

#

@thin stratus can’t see pins on phone

#

I think

thin stratus Feb 12, 2018, 4:01 PM

#

http://cedric-neukirchen.net/2017/02/14/multiplayer-network-compendium/

Cedric Neukirchen

eXi

Multiplayer Network Compendium

gaunt crown Feb 12, 2018, 4:01 PM

#

Cheers

twin juniper Feb 12, 2018, 5:12 PM

#

How can you sync the client and server random spread if you fire instantly clientside?

#

In shootergame the client sends the currentspread that was generated when he shot, but couldn't he just spoof that and send 0 spread?

brittle sinew Feb 12, 2018, 5:14 PM

#

Yes.

#

There really isn't a super great way to do that, as even if you generate it on the server and client in parallel (with a common seed), the client would still know the spread ahead of time and could account for that

#

In CS:GO, for example, the client-side spread really doesn't mean anything; it's completely visual, and the actual spread is calculated on the server

#

If you want instant feedback on the client, however, there really isn't a magic way to pull that off, as like I said, the client would still have to know the spread, and can cheat off of that

twin juniper Feb 12, 2018, 5:16 PM

#

Thanks for the indepth answer! I see that makes sense. I was thinking about using an array of spread values per shot that is decided on the client and server on begin play but as you said, the player could just compensate... same goes for recoil I guess

#

So CSGO basically processes every clientside shot on the server and the client just visually shoots, even if it hits another player on his screen?

#

Gotta implement good lag compensation in that case

brittle sinew Feb 12, 2018, 5:18 PM

#

Yeah, and that isn't perfect either. It often leads to "dusting" (a term used more often in BF games) where you see blood come from the player but no damage is done

#

In Battlefield (especially in the early days of 4), you could often hit vehicles on your end, see an explosion, and nothing would happen

twin juniper Feb 12, 2018, 5:18 PM

#

I guess that can be prevented by only calling damage fx on server and the rest on client, or just let the server call everything and have the client shoot instantly but have a delayed impact response

#

wow that is pretty extreme

brittle sinew Feb 12, 2018, 5:19 PM

#

Yeah, BF4 at launch is one of the most egregious examples of bad netcode ever, IMO

#

It was bad. Rofl

#

It got better over time, but the launch was pretty rough

twin juniper Feb 12, 2018, 5:20 PM

#

I was playing battlefront a few days ago and the servers are filled with speed hackers who can run extra fast. As a AAA developer, how can that sort of exploit even be possible?

#

Aimbots / wallhacks etc are of course not possible to prevent but it seems games that need to give the player a little bit more freedom in movement shift some things clientside

thin stratus Feb 12, 2018, 5:24 PM

#

Lots of AAA games do clientside stuff

#

Cause they don't care that much
They are on a strict time limit

#

Blame the publisher

twin juniper Feb 12, 2018, 5:25 PM

#

That is fair enough

#

Ok I'm thinking of not even bothering sending the spread values on each shot like Shootergame does (it's an extra vector, int32 and float that is sent on each shot). Since it's only even used for remote FX, is there any reason that you shouldn't just replicate a single repnotify int every time a shot is fired, and have the remote clients run through a cosmetic trace and spawn FX?

#

For example shootergame sends explicit data for both shot start and shot end fx whether it is a miss or a hit

#

The only things that really matter would be damage data, in which case the hits need to be properly shown, but for general cosmetic replication of misses, I'm not sure it's worth replicating explicit miss impact points

eternal fulcrum Feb 12, 2018, 5:59 PM

#

what youre describing is a pretty common practice

#

having a count of shots replicate down then firing your fx off of it is perfectly acceptable

twin juniper Feb 12, 2018, 6:19 PM

#

@eternal fulcrum Great thanks for responding. It just seems wasteful to have all the explicit data sent for missed shots when the clients won't notice either way, I think just a single int works nicely

manic pine Feb 12, 2018, 6:31 PM

#

the positions and rotations are different though, so it could end up looking like a miss is a hit on the other clients

twin juniper Feb 12, 2018, 6:35 PM

#

@manic pine That is true, but also comes with the problem of if you get the explicit data and the client does a fast 180 degree turn before the cosmetic FX is called, it will look like he is shooting through himself or at a very strange angle

#

At least if the remote clients simulate all the cosmetic fx themselves, it looks correct for all clients in terms of where the shots are going

#

Shootergame basically traces from the muzzle to the explicit impact point, so it would be possible to see bullets coming out at strange angles from remote clients for the sake of accuracy

manic pine Feb 12, 2018, 6:39 PM

#

yeah, and imo its more important seeing the real shot

twin juniper Feb 12, 2018, 6:39 PM

#

Is it? Even for misses?

#

Like think of how many times you are in a fast paced firefight with a player and you see where the impacts are going

#

Maybe for slow shooting weapons like snipers

manic pine Feb 12, 2018, 6:40 PM

#

well this would be for potential spectators as well ye

twin juniper Feb 12, 2018, 6:40 PM

#

But the majority of the time if you and another player are facing off at medium or close range and reasonable latency, you basically won't notice or question the fx

#

Well look at spectating in say fortnite

#

It's completely all over the place in terms of what actually happened

#

You get the idea if you see the hits

manic pine Feb 12, 2018, 6:41 PM

#

yeah i havent played fortnite, im just referring to arena shooters in general i guess

twin juniper Feb 12, 2018, 6:41 PM

#

It's just is it worth sending an int, a vector, another int and a float every time you shoot, vs a single int

#

Saves a lot over time I'd say

#

Unless you need it to be super accurate

manic pine Feb 12, 2018, 6:41 PM

#

well, how often are people shooting

twin juniper Feb 12, 2018, 6:41 PM

#

Very often

#

Machine guns

manic pine Feb 12, 2018, 6:42 PM

#

one rpc for every shot?

twin juniper Feb 12, 2018, 6:42 PM

#

If you want the shots to be accurate, yes

#

Well following shootergame, there is technically 2

#

But holding down the shoot button, there'd be 2 initially and then constant single RPCs

manic pine Feb 12, 2018, 6:44 PM

#

right, but even at a server frequency of 100, that's still reasonably little traffic per client ye

#

it uses netquantize vectors i assume

twin juniper Feb 12, 2018, 6:44 PM

#

Of coures, but you'd like to be as efficient as possible right?

#

Yeah it does

#

Like if you can scrap 3 extra properties being sent potentially thousands of times per match, you'd do it?

#

It also saves a repnotify call

manic pine Feb 12, 2018, 6:45 PM

#

maybe... would have to test it, because as a player i know how weird it feels to have this awkward simulation going on

#

makes you feel like the game's netcode is completely undependable

twin juniper Feb 12, 2018, 6:46 PM

#

Well you'd only really notice if you have trail fx- you could make players not collide with cosmetic impact fx

manic pine Feb 12, 2018, 6:46 PM

#

im talking mostly from the perspective of someone who plays a lot of round based games though

twin juniper Feb 12, 2018, 6:46 PM

#

Most games don't match the tracer fx with the actual bullet

#

Especially with hitscan

manic pine Feb 12, 2018, 6:46 PM

#

i.e. you die then spectate everyone else for 20-30 seconds

twin juniper Feb 12, 2018, 6:46 PM

#

Ah right

#

So it is important to have good spectating in that case

#

I'm more making something that will have all players in the game for the majority of the time

manic pine Feb 12, 2018, 6:47 PM

#

i suppose in stuff like fortnite and huge scale stuff, its probably of less import

#

yeah, and if everyone's always playing, then they're too busy seeing where the visuals end up

#

they'll just think "lul this guy cant aim"

twin juniper Feb 12, 2018, 6:47 PM

#

Yeah exactly

#

And if they get hit, they had seen the impacts all around them, regardless of that's exactly where the missed shots actually went, they won't question the damage

manic pine Feb 12, 2018, 6:48 PM

#

if youre going that route though, might you not as well just replicate a 'fire' var?

#

so instead of rpc every shot, activate fire and deactivate when stopped

twin juniper Feb 12, 2018, 6:49 PM

#

Well the server still has to test every shot to see if it hit something

#

This is just the cosmetic side of things that can run through a single int32 repnotify function

#

But yeah you are right that could actually work

manic pine Feb 12, 2018, 6:50 PM

#

you could do a RPC specifically for the hit

twin juniper Feb 12, 2018, 6:50 PM

#

INstead of replicating that int constantly it could just replicate once on pressed

manic pine Feb 12, 2018, 6:50 PM

#

and have clients simulate the fire regardless

#

for automatic weapons, obviously

twin juniper Feb 12, 2018, 6:50 PM

#

I think that's basically what is already setup, except I'm changing the int every shot

#

The actual gun has to still fire RPCs for each automatic shot

eternal fulcrum Feb 12, 2018, 6:51 PM

#

it actually doesnt

#

if you follow the on/off the server can simulate those shots

twin juniper Feb 12, 2018, 6:51 PM

#

Well the way I have my hit detection setup, the client tells the server if he hit anything important, and only then does the server validate (yes not the best way to do it, will implement proper compensation later)

manic pine Feb 12, 2018, 6:52 PM

#

yeah, thats the standard way

#

just with turn back time on server before validating shot

eternal fulcrum Feb 12, 2018, 6:52 PM

#

yeah so much of this is game specific, so discussions start to go beyond academic very quickly

twin juniper Feb 12, 2018, 6:52 PM

#

Yeah I want to get that rewind stuff implemented

eternal fulcrum Feb 12, 2018, 6:52 PM

#

heh, working on that today

#

its quite a bit of work to do it right btw

#

expecially depending on the fidelity you want

#

if animations come into play, even more work

manic pine Feb 12, 2018, 6:53 PM

#

its not so bad

#

ignoring copypaste code per hitbox, its very few lines in total

eternal fulcrum Feb 12, 2018, 6:54 PM

#

...?

twin juniper Feb 12, 2018, 6:54 PM

#

Oh, by chance can you answer this? In my head, when the server literally moves all clients to the position of a certain client that shot to retrace the shot at a timestamp, I keep imagining they are actually being moved in the map- this movement doesn't actually affect their server position does it?

#

Or does it happen so fast, it doesn't affect anything

manic pine Feb 12, 2018, 6:54 PM

#

im not moving clients at all

#

im binding X hitboxes to sockets on the character(make sure dedi is simulating animations/bones), and storing those hitboxes positions every tick

#

on turn back time, move every hitbox back to time X

twin juniper Feb 12, 2018, 6:55 PM

#

If we simplify this to just the capsule collision, would that mean that the server just traces against the client's cached capsule collision at X time?

manic pine Feb 12, 2018, 6:56 PM

#

if you use capsule then, assuming its root position, you'll be effectively moving the actor

#

root component*

#

but yeah, keep in mind its not ticking at that new position

twin juniper Feb 12, 2018, 6:57 PM

#

You are right yeah

manic pine Feb 12, 2018, 6:57 PM

#

you'll need to teleport though, there's two ways of moving

#

one does a sweep, the other just changes positions

twin juniper Feb 12, 2018, 6:57 PM

#

You still do move the actual actor though to actually fire from the weapon right?

#

The firing actor that is

#

And then you can trace against thecached collision of the hit actor at timestamp X

manic pine Feb 12, 2018, 6:57 PM

#

moving the firing actor? why

twin juniper Feb 12, 2018, 6:58 PM

#

Well where he was on his screen at time X wasn't where he was on the server

manic pine Feb 12, 2018, 6:58 PM

#

but its where he will be

twin juniper Feb 12, 2018, 6:58 PM

#

So the server has to be where he was to do the shot no?

manic pine Feb 12, 2018, 6:58 PM

#

keep in mind, by the time ServerRPC to fire reaches server

#

so will clients latest move

twin juniper Feb 12, 2018, 6:58 PM

#

Right but that means it would trace from a different position on the server, wouldn't it?

#

Like client shoots at time 85, sends rpc, server gets it at time 92, the server has to know where client was at 85 and then shoot from that position surely?

manic pine Feb 12, 2018, 6:59 PM

#

client sends continuous move updates to server, e.g. ServerPerformMove

#

assuming youre using charmovecomp

twin juniper Feb 12, 2018, 6:59 PM

#

yep I am

manic pine Feb 12, 2018, 7:00 PM

#

right, so at the same time as your fire RPC reaches server, it should have received a ServerMoveRPC right before

#

which would take server to same position client was at time of fire

twin juniper Feb 12, 2018, 7:01 PM

#

Ok so server knows the position at the time of fire, and the hitbox position of the enemy at time of fire, however right now on the server the positions are different

manic pine Feb 12, 2018, 7:01 PM

#

keep in mind client is ahead of server for his own character

twin juniper Feb 12, 2018, 7:01 PM

#

So what does it do to call the trace? Teleport, call trace, teleport back?

#

Yep the client is ahead but wouldn't the server be off by a bit if he didn't move anything and just shot as soon as it got the update?

manic pine Feb 12, 2018, 7:03 PM

#

right before the shot, server receives the latest move rpc... the one client did right before shot

#

so generally no, at least not without packet loss

#

keep in mind one weakness of the current implementation though, it uses netquantize for rotation

#

that makes you lose accuracy for servers character rotation

#

even at netquantize100, it can make a huge difference for long-range shots

twin juniper Feb 12, 2018, 7:04 PM

#

Got it, thanks for all the info!

#

Did you learn how to implement this stuff anywhere in particular?

#

Looking to gather as much learning material as possible

manic pine Feb 12, 2018, 7:05 PM

#

for moving the hitboxes(which in my case are just components), i use e.g. HitboxArmRight->SetWorldLocationAndRotation(PositionStates.ArmRight.Position, PositionStates.ArmRight.Rotation, false, nullptr, ETeleportType::TeleportPhysics);

#

the ideal would of course be to just store actor location, rotation, animation and animation time

#

mucuh less information

#

i didnt find a good way of accessing and setting that on the fly though

#

but remember to put the hitboxes back where you found it once server verification is done ^___^

twin juniper Feb 12, 2018, 7:08 PM

#

UT stores Position, Rotation, Velocity, Time, Timestamp etc in an array of structs

#

Thanks for the info btw

#

So you do it in an instant so nothing really gets moved right?

manic pine Feb 12, 2018, 7:10 PM

#

yeah, on the hit characters(as determined by the firing client), i tell them to set their hitboxes to WorldTime - FiringChar'sPing/2

#

then run the trace, then put hitboxes back

twin juniper Feb 12, 2018, 7:11 PM

#

Got it

#

Yeah in essence it actually seems like a simple enough operation in terms of length

#

If you have the data stored and have correct timestamps, it's just a matter of changing the location and running the trace with that data at a certain time

manic pine Feb 12, 2018, 7:12 PM

#

yeah, the only annoying thing here is i made a bit more hitboxes than i should

#

ive like 15 of them for every character ^___^

twin juniper Feb 12, 2018, 7:13 PM

#

Wow damn..

#

Would it be unwise to trust the client if the server verifies the hit?

#

I guess so cause hackers could get legit hits but just tell the server it was a headshot every time...

manic pine Feb 12, 2018, 7:14 PM

#

i just use the clients hit info for deciding which actors i should revert time for

#

so it cant really be hacked

twin juniper Feb 12, 2018, 7:15 PM

#

Nice that sounds good

manic pine Feb 12, 2018, 7:16 PM

#

for debugging it you can just make a net multicast which draws debug shapes of the hitboxes at the time of hit

twin juniper Feb 12, 2018, 7:16 PM

#

Great idea

manic pine Feb 12, 2018, 7:17 PM

#

i made a circular list for storing the hit information, to avoid massive reallocations

#

since server will need to do a StoreHitboxLocations() on every tick

#

of every character

#

oh and since WorldTime-Ping/2 will never correspond to the exact time when hitbox location was stored, you'll need to interpolate between the two closest hitbox histories

#

hmm was actually more work than i remembered

twin juniper Feb 12, 2018, 7:28 PM

#

Yeah that's what I was thinking when you said you just used the moment the player sent the packet, thought there'd need to be some interp too

manic pine Feb 12, 2018, 7:29 PM

#

the lerp is for the hitboxes of the target char, not the shooter

#

lets say server stored positions at world time 1.1 and 1.2 and current world time is 1.3, player ping is 250ms

#

desired hitbox time would then be 1.175

#

so you'd do a lerp between hitboxes at 1.1 and 1.2 with alpha 75% ye

twin juniper Feb 12, 2018, 7:32 PM

#

got it, thanks for all the details!

manic pine Feb 12, 2018, 7:34 PM

#

yeah, best of luck

pallid mesa Feb 12, 2018, 8:35 PM

#

@thin stratus hey eXi, I was re-reading your conpendium and I noticed that on the page 45 you don't have that last elseC void ATestPlayerController::BeginPlay() { Super::BeginPlay(); // Make sure only the Client Version of this PlayerController calls the ServerRPC if(Role < ROLE_Authority) { Server_IncreaseVariable(); } else { IncreaseVariable(); } }

thin stratus Feb 12, 2018, 8:36 PM

#

Depends on if I wanted it there or not

#

Might be that 45 was just about ServerRPCs

pallid mesa Feb 12, 2018, 8:37 PM

#

yep it is about server RPC later on gets addressed that part I mention but I thogh it was something you missed there, just saying just in case :P

thin stratus Feb 12, 2018, 8:37 PM

#

Looking at the pages before

#

I'm simply redoing the Blueprints

#

And there was only the ServerRPC

#

So that "missing" was on purpose

pallid mesa Feb 12, 2018, 8:39 PM

#

but in bp's you would need a switch has authority and plug the rpc on remote, don't you?

thin stratus Feb 12, 2018, 8:39 PM

#

📎 unknown.png

pallid mesa Feb 12, 2018, 8:42 PM

#

👍

heady delta Feb 12, 2018, 9:29 PM

#

this is probably a common q, but replication condition on an inventory array in a component that can be accessed by people other than the actor owner. Might it be better to update the client array via RPC when they need to interact?

thin stratus Feb 12, 2018, 9:36 PM

#

Well, the array itself should only sit on the server anyway

#

The client only needs the data needed for visualization it

manic pine Feb 12, 2018, 9:36 PM

#

and there's the problem with interacting with it, since non-owning clients cant do server rpcs on that actor

heady delta Feb 12, 2018, 9:37 PM

#

usually for inventory stuff I go through the player state since their own component is there

#

not directly calling RPC on another actor

hidden thorn Feb 12, 2018, 9:52 PM

#

nvm issue sort of fixed

ripe raptor Feb 13, 2018, 12:57 PM

#

Is "OnPossessed" only called on the server, or the owning client as well?

winged badger Feb 13, 2018, 12:59 PM

#

I think server only, function is commented in Pawn.h

ripe raptor Feb 13, 2018, 1:08 PM

#

Yeah just tested it out, that's unfortunate.

winged badger Feb 13, 2018, 1:46 PM

#

you can easily send a client RPC from the server event

#

at the point pawn receives OnPossessed, it is owned by the controller

ripe raptor Feb 13, 2018, 2:25 PM

#

yeah I did that

ripe raptor Feb 13, 2018, 4:02 PM

#

How can I detect if I am in a session?

#

Whether as a server or client

#

found it

twin juniper Feb 13, 2018, 4:06 PM

#

how to make a game MP able? want a video tut. max 20 minutes.

ripe raptor Feb 13, 2018, 4:10 PM

#

hah

#

The best I can give you under those constraints is "hire someone who didn't limit themself to 20m of learning"

junior tree Feb 13, 2018, 4:25 PM

#

any way to test dedicated server with builds in a local lan without having the engine source? Can the builds connect to a dedicated server project launch with uncooked content?

#

yes it can, apparently!

twin juniper Feb 13, 2018, 4:46 PM

#

is there a way to load into a level

#

without using open 127.0.0.1

#

because this causes the player to stop playing any audio

#

that is currently playing

#

Personally... i think this is a very poor design

#

and seamless travel, has two paragraphs explaining what it does

#

so i dont even know if this would be a good solution for me, also i have never gotten seamless travel to do anything visible

mild hull Feb 13, 2018, 4:49 PM

#

when you move to new server you unload most things, i would look into loading screen and continue the audio there

twin juniper Feb 13, 2018, 4:51 PM

#

i have a loading screen working

#

but i want a real loading screen

#

@mild hull checkout this: https://www.youtube.com/watch?v=SC5OI7ifk6U

YouTube

Otto Awqatty

Assassins Creed Loading Screen

▶ Play video

#

you see how Assassins creed is not a static loading screen

#

but an interactive one

#

where u can actually do shit

#

i want to be able to place things like particles, or have random NPCs being shown during my loading screens

#

not just an image and some slate widget

#

I don't think unreal has this, and especially not for multiplayer

mild hull Feb 13, 2018, 4:56 PM

#

not to sure but there should be a world and you should be able to populate it however you want, but never did much with loading screens

twin juniper Feb 13, 2018, 4:56 PM

#

yeah

#

i think its not possible

#

personally

#

but at a bare minimum i would like to keep my sound playing across level loads

#

and not just lose all sound

#

really ruins any type of immersion

#

Looking at UT, it seems that the hitbox is just the root collision capsule!

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That is pretty interesting as it saves a lot of complexity when doing lag compensation

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Is there any way to use the PHAT collision capsules as a hitbox (or is that what is happening automatically when not tracing complex?)

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It seems that even with lag compensation, if you have hitboxes that cover the body and move with animations, there are problems that come in to play if a player dropshots while another player shoots him: the player that is shooting sees the enemy standing up on his screen, but when the shot gets verified on the server, it uses the correct client timestamp but the current animation state

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And I think syncing animation states along with all the position and rotation data in each snapshot is a bit too complex for basic lag comp

chrome bay Feb 13, 2018, 5:08 PM

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@twin juniper Sound can traverse levels if you want it to, but the audio component needs to be managed by something that isn't an actor.

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UAudioComponent::bIgnoreForFlushing

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You can't keep audio around that's owned by actors because the actors are destroyed

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@twin juniper Syncing animation state isn't usually neccesary because the animations should be driven by what the character movement is doing anyway (which is synced).

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@twin juniper If you want an "active" loading map, you can use a Transition map and use Seamless travel. All players will be moved to the transition map while the server loads the next map in the background - but transition maps should contain as little as possible.

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And you'll probably have to jump through a few hoops to get an a-creed style loading screen working

twin juniper Feb 13, 2018, 5:16 PM

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@chrome bay Well if an enemy was playing a switch weapon animation on the cilent when he shot, which has his arm raised up, and he hit the arm, but then the server rewinds to that frame when it gets the packet, I don't think it'll also recreate that animation state unless you send explicit data no?

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I thought it would play the current animation and just teleport the enemy

chrome bay Feb 13, 2018, 5:16 PM

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But yeah, hitboxes for projectiles are usually just the cylinder - otherwise different characters have different hitboxes and that's considered unfair

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And no it won't - but switch animations etc. aren't driven by movement they're probably driven by RPC's

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It's not worth the bandwidth cost to sync that kind of stuff

twin juniper Feb 13, 2018, 5:17 PM

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Yeah it seems like it would be VERY costly to caclulate on each bullet

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I think I'll go with a nice simple capsule

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I wonder how headshots are done with the single capsule approach though, maybe a second trace on a different channel just for headshot collision? Have to look deeper into that

chrome bay Feb 13, 2018, 5:18 PM

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You could just check the distance the the head bone I guess

twin juniper Feb 13, 2018, 5:19 PM

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Very true!

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I also saw this method: http://blog.bluecurse.com/2017/09/18/lag_compensation_part_1/

bluecurse soft

recursive

Lag Compensation in Unreal Engine 4 (C++) - Part 1: Hitbox Tracking

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Where he creates primitve boxes which would mean the hitbox would stay consistent over different meshes

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Does that seems like an ideal approach for more accuracy?

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So the mesh could be swapped out but the boxes would stay consistent on the pawn

chrome bay Feb 13, 2018, 5:20 PM

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Christ that looks expensive

twin juniper Feb 13, 2018, 5:20 PM

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Yeah it does

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WHich is why I'm wary

chrome bay Feb 13, 2018, 5:20 PM

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I'd avoid that like the plague

twin juniper Feb 13, 2018, 5:20 PM

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But then again that data doesn't need to be sent, only timestamps need to be sent

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You'd just have to cache all of that locally on client and server

heady delta Feb 13, 2018, 5:20 PM

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you could do lag comp with an animation pose snapshot maybe

twin juniper Feb 13, 2018, 5:21 PM

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I wonder how expensive that would be per bullet

chrome bay Feb 13, 2018, 5:22 PM

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It's not cheap, playing back the physics on the character is costly

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And if you're doing it not only for correction but also for lag compensation, don't expect any more than 8-10 players in the match IMO. Might be acceptable with dedicated servers, can't imagine listen servers woud handle it well

twin juniper Feb 13, 2018, 5:23 PM

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Are you talking about the first link or the pose method?

chrome bay Feb 13, 2018, 5:23 PM

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If you're building a competitive shooter, I'd look at how UT handles it

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The link

twin juniper Feb 13, 2018, 5:24 PM

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I just wonder how CSGO gets away with all the capsules

📎 Hitboxes_comparison_old_new.png

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UT seems to have a very solid hitscan rewind and projectile rewind technique in place

chrome bay Feb 13, 2018, 5:25 PM

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BRB

twin juniper Feb 13, 2018, 5:26 PM

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@chrome baydo you know any information about seamless travel? Do you go to that map when we call open ip address to connect to a server?

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And if we do

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Where does the camera spawn

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Would it work if it was owned by a u object?

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Seamless travel has never worked for me

twin juniper Feb 13, 2018, 5:49 PM

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Hmmm also seeing that UT has bTraceComplex = true for hitscan weapons, maybe they are tracing against the actual mesh on the client but on server they trace simple against the capsule?

tough gyro Feb 13, 2018, 6:08 PM

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looking at that hit box position saving thingy in the link

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I do wonder if animations are totally in sync across clients and server?

twin juniper Feb 13, 2018, 6:15 PM

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Yeah that's what I'm saying- the server would rewind and move the hitboxes back but with the current animation frame, not what it was at the time of shooting @tough gyro

tough gyro Feb 13, 2018, 6:19 PM

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that doesn't sound correct

twin juniper Feb 13, 2018, 6:22 PM

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Well you'd have to send more than the location, rotation and time if that was the case

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COD had that problem up until black ops 3

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And even then they said a lot more data had to be sent per shot

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Normally it's not an issue but I'd say with extreme poses it can cause issues

chrome bay Feb 13, 2018, 6:29 PM

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@twin juniper I've never used Seamless Travel myself, but it's what a lot of the UE3 games used, particular Gears of War.

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@twin juniper To be honest, the difference is probably so marginal it's barely worth the difference. You have to give the client some leeway otherwise the game would feel horrible

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And I'm also paranoid about adding excess components but if you want more advanced / varied hit detection I guess there's not much you can do about it

twin juniper Feb 13, 2018, 6:32 PM

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I just want fair shooting, doesn't have to be super accurate. Also want the lag comp rewind to be as simple as possible

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So a capsule seems like the easiest option

chrome bay Feb 13, 2018, 6:32 PM

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Yeah, I don't think simple lag compensation exists to be honest haha

twin juniper Feb 13, 2018, 6:35 PM

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Well it's not as hard as I thought it would be in theory at least: send constant timestamps, when shot is taken on client, the server moves the client to the position he was at when he shot, and also moves all other player hitboxes back, traces and if hit, the client gets his hit

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Some of the clientside methods can be equally complex if doing stuff like creating bounding boxes around the clients on the server, and they tend to be way less accurate

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But moving a single capsule and testing against that is certainly simpler than creating a heirarchy of box components and test against those

junior tree Feb 13, 2018, 7:08 PM

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so I got a bunch of instanced static mesh components in my game that the users edit (add and remove instances) and I would like it to work with reconnect feature. Is there any clever way to make this? Right now I'd be using multicast events with a lot of unnecessary data traveling around

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basically when a player connects to a game it will need to have all the instance transforms from the server and place them

twin juniper Feb 13, 2018, 7:26 PM

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@chrome bay if i spawn my sound on a UObject

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will it stay between level loads?

pallid mesa Feb 13, 2018, 7:34 PM

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@chrome bay in terms of leeway values, do you have any notion of how to properly choose a proper leeway value?

twin juniper Feb 13, 2018, 7:40 PM

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https://docs.unrealengine.com/latest/INT/Gameplay/Networking/Travelling/

Travelling in Multiplayer

An overview of how travelling works in multiplayer.

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the only article about seamless travel

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and it literally trells me nothing

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lel

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nothing that i dont already know

thin stratus Feb 13, 2018, 8:38 PM

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It does pretty much tell you all you need :D

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At the bottom it says how to persist actors via seamless travel

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If you Uobject is part of a persisting actor, then I assume it will survive

twin juniper Feb 13, 2018, 8:50 PM

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@thin stratus but does the actor need to be replicated?

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because ideally i would like to be able to just put an actor on the client, keep it until the loading ends

thin stratus Feb 13, 2018, 8:58 PM

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Well the PlayerController can call "GetSeamlessTravelActorList"

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Which gives you a way of registering the actor that should survive

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However, idk if that runs only on the server

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If yes, then the actor would need to be replicated

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Another way of preserving information would be adding a UObject to root and removing it later again

twin juniper Feb 13, 2018, 8:59 PM

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that would mean it wouldnt work as a way to transfer sound across levels

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lol

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ive also tried to spawn sound

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on UGameInstance

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doesnt work

thin stratus Feb 13, 2018, 8:59 PM

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Well I assume sound is some sort of SoundComponent

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that needs an actor

twin juniper Feb 13, 2018, 9:00 PM

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exactly

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so its essentially impossible

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to persist sound

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across level load

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but ive seen ARK do it

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lol

thin stratus Feb 13, 2018, 9:01 PM

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There is flag on sounds

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That allows them to survive level changes

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"bIgnoreForFlushing"

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have you tried that?

twin juniper Feb 13, 2018, 9:09 PM

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yea, but u still need it to end, after level load

harsh lodge Feb 14, 2018, 4:51 AM

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Can anyone help with Android app not creating or joining session if Google play is enabled?

tawny parcel Feb 14, 2018, 6:40 AM

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If anyone has any experience with CORS and HTML5 games I would love some help right now!

https://answers.unrealengine.com/questions/756942/html5-cors-issue-to-my-hosted-server.html

dense tree Feb 14, 2018, 7:04 AM

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Hey guys,
I'm trying to work with physics handle in multiplayer. At begin play I'm using -grab component at location (which runs on server). All the components are replicated. But when I play the game in Multiplayer, the grabbed component seems to shake. Has anyone faced a similar problem? Would appreciate any kind of help!

winged badger Feb 14, 2018, 8:12 AM

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replicating more then 1 component with FTransform per actor can have some weird side-effects

ripe raptor Feb 14, 2018, 8:53 AM

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Having an extremely tough time replicating arrays...

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They just don't want to replicate on the initial pawn spawning

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just a TArray of classes

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replicates just fine if I change it when both players are in... but when the second player joins they don't get the state of the array from the first player

mellow cipher Feb 14, 2018, 9:51 AM

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https://issues.unrealengine.com/issue/UE-43969