#multiplayer | Unreal Source | Page 386

wary willow Apr 13, 2018, 5:24 PM

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@heady scroll hm?

heady scroll Apr 13, 2018, 5:25 PM

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Figuring out how to put this

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Basically, I've got usernames people can enter when joining a server

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And when they do the server sets a text above their head to the username they just entered

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Now, when someone joins the game after someone set their username

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That ends up with them not seeing that username

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Is there any easy or 'correct' way to get that synced?

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(I really don't know anything about 'correct' ways in regards to networking :P)

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(I can come up with some bruteforce-ish stuff for this, but I'm wondering how others would do this)

thorny kelp Apr 13, 2018, 5:29 PM

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The correct way in Unreal is to use replicated variables for state

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You can actually use 'player name' from 'player state'

wary willow Apr 13, 2018, 5:29 PM

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@heady scroll Are you using RepNotify?

thorny kelp Apr 13, 2018, 5:29 PM

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its already replicated

wary willow Apr 13, 2018, 5:30 PM

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You should be using that if you want them to persist

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If you are doing it via MultiCast, they won't

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Typically

heady scroll Apr 13, 2018, 5:30 PM

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RepNotify being? (Take that as a no)

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😛

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I've sort of been bruteforcing my way through networking

thorny kelp Apr 13, 2018, 5:33 PM

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@heady scroll You can set your variables to replicate, this way it will always pass the value from server to clients.

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You will still need Custom Events to pass data from client to server

modern dome Apr 13, 2018, 5:36 PM

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@thin stratus but PlayerState exists on all clients, or what do you mean?

thin stratus Apr 13, 2018, 5:36 PM

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Yeah

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So Tick should also call on all of them

heady scroll Apr 13, 2018, 5:39 PM

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WHat's the difference between RepNotify and Replicated in replication settings for vars?

thorny kelp Apr 13, 2018, 5:40 PM

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@heady scroll You will notice that with RepNotify, engine will create an additional function Rep_VariableName, this function will be called automatically each time value is updated, on both client and server

heady scroll Apr 13, 2018, 5:40 PM

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On all clients?

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Ah

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Cool

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And replicated?

thorny kelp Apr 13, 2018, 5:41 PM

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@heady scroll yes, there are also parameters to control, who will be notified

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yes

heady scroll Apr 13, 2018, 5:41 PM

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That just replicates the var and does nothing else?

thorny kelp Apr 13, 2018, 5:41 PM

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Yes

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@heady scroll note that variable replication works only in one direction. From server to clients

heady scroll Apr 13, 2018, 5:44 PM

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Ah

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An repnotify works from client to server to clients?

thorny kelp Apr 13, 2018, 5:45 PM

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yes

heady scroll Apr 13, 2018, 5:45 PM

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Awesome

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That explains then

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Thanks 😄

wary willow Apr 13, 2018, 5:45 PM

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What's the best way to replicate Animation Blueprints currently?

heady scroll Apr 13, 2018, 5:45 PM

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That'll make MP-dev way easier

wary willow Apr 13, 2018, 5:45 PM

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📎 unknown.png

thorny kelp Apr 13, 2018, 5:45 PM

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@heady scroll you misunderstood I think

winged badger Apr 13, 2018, 5:46 PM

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as with most things, replicate state and use RepNotify

thin stratus Apr 13, 2018, 5:46 PM

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Replicate the Data

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And use that in the non replicated bp

wary willow Apr 13, 2018, 5:46 PM

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This is a snippet that's being done by someone else right now, but I need to know the better way.

thorny kelp Apr 13, 2018, 5:46 PM

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@heady scroll RepNotify wont replicate from clients to server

wary willow Apr 13, 2018, 5:46 PM

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I don't know crap about animations bps

winged badger Apr 13, 2018, 5:46 PM

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you do know there is an event that triggers an animation

wary willow Apr 13, 2018, 5:46 PM

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No I don't

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Because I am not an animator

thin stratus Apr 13, 2018, 5:47 PM

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Use them like Widgets

wary willow Apr 13, 2018, 5:47 PM

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I just said that..

thin stratus Apr 13, 2018, 5:47 PM

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Replicate the Data in the Character and grab it in the animBP

solar halo Apr 13, 2018, 5:54 PM

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@fleet sluice just curious.

modern dome Apr 13, 2018, 6:01 PM

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@thin stratus but GetPlayerPawn(0) returns the local Pawn. all player states would accumulate the local pawn's location, not the onne of the owning PlayerController

thin stratus Apr 13, 2018, 6:06 PM

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GetPlayerPawn(0) gets the pawn relative to who calls that

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If ClientA calls it, it's ClientA's Pawn

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etc.

untold sun Apr 13, 2018, 7:00 PM

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when I test a multiplayer game from the editor, why is the purpose of the window showing the title "Game Preview Server"? To me, that shows the world´s state as it exists on the server, not any client replication.

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what, not why

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I thought when I start with 2 players it actually shows 2 clients

severe widget Apr 13, 2018, 7:01 PM

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listen servers are also effectively the network authority

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You need to use the checkbox emulate dedicated server or w/e

untold sun Apr 13, 2018, 7:04 PM

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that means I always have to code two "versions" of my gameplay - one for any client and one for the server

severe widget Apr 13, 2018, 7:04 PM

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Eh?

modern dome Apr 13, 2018, 7:04 PM

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@thin stratus PlayerState exists on all Clients.

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Client A: PlayerStateA getPlayerPawn(0) -> Client A Pawn
Cliebt B: PlayerStateA getPlayerPawn(0) -> Client B Pawn

thin stratus Apr 13, 2018, 7:05 PM

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Yeah

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So?

modern dome Apr 13, 2018, 7:05 PM

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how can I execute my tick only on the owning client

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?

untold sun Apr 13, 2018, 7:06 PM

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when I spawn an actor on keypress I have to handle the case when a) keypress happens on the client -> I need a serverRPC b) keypress on the server, no server rpc

severe widget Apr 13, 2018, 7:06 PM

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You can prolly check if the pawn's PS is self

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Well yeah, but that's not two versions of the game. That's handling special case stuff so that the rest can be more or less the same version.

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Don't like that one client is special? Plan for dedicated servers.

untold sun Apr 13, 2018, 7:07 PM

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this is what @thin stratus wrote me yesterday - I am just surprised. Bare with me, I am bloody beginner in networking.

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yes, not two versions of all the game...

thin stratus Apr 13, 2018, 7:09 PM

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Well you can also directly call the RPC

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ServerRPC called on server will just result in a normal event

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But using switch has authority is cleaner

untold sun Apr 13, 2018, 7:24 PM

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actually very simple, but it took me really long to figure it out.

📎 networkingHelloWorld.png

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@thin stratus how about adding this as "networking hello world" to your guide?

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I am sure many people would profit from that

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but your decision of course

meager spade Apr 13, 2018, 7:29 PM

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@untold sun tbh, it's quite easy to understand (well i think so...) maybe i just understand things quicker/easier than some people

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cederic's guide was so useful how it is

untold sun Apr 13, 2018, 7:34 PM

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Things usually always are easy as soon as you know how they work 😉 I have to learn about networking besides my day job and other "distracting" things. So for me it would have been helpful to have an immediate "hello world". And yes, of course his guide is very helpful.

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@meager spade Actually it took me hours to find it out 😉 hahaha

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besides reading a lot in the ue4 docs and distilling what is important for a simple helloworld

thin stratus Apr 13, 2018, 7:41 PM

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It helps a lot more if you find that one out yourself

untold sun Apr 13, 2018, 7:42 PM

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that is definately true also

sharp spire Apr 13, 2018, 7:48 PM

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Sorry, read something a few posts up about animationBP and replication. If a variable is replicated in say; the pawn; and sent over to the animation, then it is automatically still replicated? For some reason to me it sounds like that would have a tiny delay if it came down to the details

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If not then what is the soul purpose of replicated variables in animationBPs?

thin stratus Apr 13, 2018, 7:50 PM

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You don't have replicated vars in animBPs

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You have them in the Character/Pawn

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it's the same idea has having a Widget and a replicated health variable in the pawn

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And the widget grabs that and displays it

sharp spire Apr 13, 2018, 7:51 PM

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But the animationBP actually has a replicated toggle for all variables and allows custom events sent through the server

thin stratus Apr 13, 2018, 7:51 PM

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Yeah but I don't see the reason to replicate another class

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Specially an animBP

sharp spire Apr 13, 2018, 7:51 PM

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Me either that was why I asked lol

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Oh maybe for animation notify?

thin stratus Apr 13, 2018, 7:52 PM

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Why would you need an animation notify to be replicated

sharp spire Apr 13, 2018, 7:53 PM

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To cause a replicated event from the animation graph instead of sending it back. Idk lol

thin stratus Apr 13, 2018, 7:53 PM

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Stop forcing a reason :D

sharp spire Apr 13, 2018, 7:53 PM

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I don’t understand why epic has it D; lol but fair enough. I’ll ignore it :b

severe widget Apr 13, 2018, 8:00 PM

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Not removing useless functionality when re-using a system (bp graph) is easier than removing it.

sharp spire Apr 13, 2018, 8:00 PM

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Also, is the best way of replicating speed by making a custom variable and setting it based on pawn velocity? Just making sure I did that right

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Fair enough @severe widget

hidden thorn Apr 13, 2018, 9:55 PM

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When I run this on the client it crashes with the error code c0000005 (first/second chance not available), I know the objects are spawned on both the server and client but I assume It's because I am trying to pass a null Item since they are 2 different items.
The error line is inventory.cpp:25 which is basically the bracket.

This is the first time I used a Client RPC and I understand how it works but in this case I don't really see a workaround.

void UInventory::AddNewSlot(AItemBase* Item)
{ // <- Line 25
    ...
}

// This is called inside a ServerRPC
void URPGPlayerInventory::SpawnItem(TSubclassOf<AItemBase> Item)
{
    FActorSpawnParameters spawnParams;
    spawnParams.Owner = Player;

    FVector spawnLocation = Player->GetTransform().GetLocation();

    AItemBase* tempItem = GetWorld()->SpawnActor<AItemBase>(Item, spawnLocation, FRotator(0.0f, 0.0f, 0.0f), spawnParams);
    tempItem->HideItem();

    Client_AddNewWidgetSlot(tempItem);
    InventoryList.Add(tempItem);
}

void URPGPlayerInventory::Client_AddNewWidgetSlot_Implementation(AItemBase* Item)
{
    Player->PlayerHUD->GetInventoryWidget()->AddNewSlot(Item);
}

meager spade Apr 13, 2018, 11:11 PM

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should always be checking for null pointers, btw, if (ensure(tempItem)) { tempItem->HideItem(); } else { UE_LOG(LogTemp, Warning, TEXT("tempItem is nullptr") }

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tempItem->HideItem(); 
   Client_AddNewWidgetSlot(tempItem);
    InventoryList.Add(tempItem);
} else { 
UE_LOG(LogTemp, Warning, TEXT("tempItem is nullptr") 
}```

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you should always check for nullptrs

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reason it's null, well not sure about that, maybe step through the code in vs to find out

hidden thorn Apr 13, 2018, 11:15 PM

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Well I checked from the clients perspective and it isn't null it does show up, and the item is being added to the inventorylist

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show up as in spawns on their end

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Also it seems tempItem-HideItem() is only called on the server it doesn't affect the clients.

winged badger Apr 13, 2018, 11:26 PM

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so you have AItemBase, which is replicated

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and you have a TArray<AItemBase> which is also replicated

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and AItemBase object is created at roughly the same time its added to the server's array

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unless the AItemBase object replicated already and is constructed on client

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whatever reference TArray replicated for it is nonsense to the client

hidden thorn Apr 13, 2018, 11:28 PM

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Everything you said is true and yeah you might be right about this whatever reference TArray replicated for it is nonsense to the client

winged badger Apr 13, 2018, 11:30 PM

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spawnParams takes an Owner in it

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pretty sure it is replicated

hidden thorn Apr 13, 2018, 11:30 PM

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yes

winged badger Apr 13, 2018, 11:31 PM

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so you might try and add the item on its construction on the client into the GetOwner()-><get to the required reference to TArray from there> on the client

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not a great solution either, ignore

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sorry, brain fried by now, long day

hidden thorn Apr 13, 2018, 11:36 PM

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No worries, I had a long and busy day working on this (got loads of things working)

winged badger Apr 13, 2018, 11:36 PM

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(destroying the item on server with this approach would leave you with TArray containing some nullpointers)

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on the client

twin juniper Apr 13, 2018, 11:40 PM

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is there anyway to stop a multicast from running on actors that aren't even network relevant ? the actor calling the multicast is the weapon.

example: 2 players across the map, they know nothing of each-other (they are outside of relevancy range)
player1 attacks with their weapon which is also outside of relevancy range
player2 still receives data about the attack

switching to the tried and true "burstfire" onrep method works but i don't know if that reliability bug has been fixed yet. it was game crippling last time 4.16~.

hidden thorn Apr 13, 2018, 11:40 PM

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Everything works just fine except Client_AddNewWidgetSlot(tempItem);, TArray is updated on both server and client and the items are spawned but if I want to use tempItem or call anything on it will have no effect on clients.

winged badger Apr 13, 2018, 11:40 PM

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reliability bug?

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tempItem is a local variable

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you are passing it by constant reference?

hidden thorn Apr 13, 2018, 11:43 PM

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i am not sure

winged badger Apr 13, 2018, 11:44 PM

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show me the declaration of Client_AddNewWidgetSlot

hidden thorn Apr 13, 2018, 11:45 PM

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// I assume this is the definition
UFUNCTION(Client, Reliable, WithValidation)
void Client_AddNewWidgetSlot(class AItemBase* Item);

// And this is the declaration
void URPGPlayerInventory::Client_AddNewWidgetSlot_Implementation(AItemBase* Item)
{
    Player->PlayerHUD->GetInventoryWidget()->AddNewSlot(Item);
}

winged badger Apr 13, 2018, 11:46 PM

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try Client_AddNewWidgetSlot(const AItemBase*& Item);

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not sure where class fits there exactly, but you can forward declare it above the class declaration if it doens't

hidden thorn Apr 13, 2018, 11:49 PM

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I've never seen that before, so how do I pass a pointer to the method?

winged badger Apr 13, 2018, 11:49 PM

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i am half guessing here

hidden thorn Apr 13, 2018, 11:50 PM

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https://i.imgur.com/Ld5kri4.png

Imgur

winged badger Apr 13, 2018, 11:50 PM

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but if you were to pass a temporary variable as a pointer argument to the delegate, compiler would throw a fit

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can't imagine networking being more lenient

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did you change the method signature in both .h and .cpp?

hidden thorn Apr 13, 2018, 11:51 PM

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yea

twin juniper Apr 13, 2018, 11:55 PM

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PLS

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THE MILITARY ARE ABOUT TO DESTROY MOLES GROUP!!!

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WE NEED HELP!!!!

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DAMMIT REPNOTIFIES ARE NOT RELIABLE!!!!

winged badger Apr 13, 2018, 11:57 PM

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overdoing the reliable bit usually ends badly

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with things like "reliable buffer overflow"

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and jerky movement

twin juniper Apr 13, 2018, 11:57 PM

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this is not tick or on frame this is every 2-3 seconds

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repnotify would not fire sometimes but multicast 100% reliable

winged badger Apr 13, 2018, 11:58 PM

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multicast has its own problems

twin juniper Apr 13, 2018, 11:58 PM

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increasing network tickrate to some stupid number like 200 added more reliability for repnotify but thats just not a solution

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and i am facing multicast's problems now... how to save myself from destruction?

winged badger Apr 13, 2018, 11:58 PM

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my replicated variables work just fine

twin juniper Apr 13, 2018, 11:58 PM

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wat engine version ?

winged badger Apr 13, 2018, 11:58 PM

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as do RepNotify

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4.14, 4.15 and 4.18

twin juniper Apr 13, 2018, 11:59 PM

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GET EM OUTA HERE BULLSHTT I AINT SOME KIND OF WIPPERSNAPPER THAT AINT KNOW JACK I PRESS F7 TO COMPILE CODE I KNOW EVERYTHING!!!! NOTHING IS WRONG WITH MY CODE!!!!!!

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😢

winged badger Apr 14, 2018, 12:00 AM

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there is a RepRetry specifier for larger objects that might fail to be sent in their entirety

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but for firing state a byte is sufficient

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and if that was supposed to be funny, it really wasn't

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😦

glacial pollen Apr 14, 2018, 2:06 AM

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Okay guys. Lets start with something simple.... Does this look right?

📎 unknown.png

jolly siren Apr 14, 2018, 2:08 AM

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You shouldn't be setting replicated variables on the client.

flat bison Apr 14, 2018, 2:17 AM

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So this at the end should set DodgeLeftB to false and does but then changed back into true

📎 Screenshot_4.png

glacial pollen Apr 14, 2018, 2:21 AM

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@jolly siren You just indirectly solved roughly 12 different issues, thanks!

winged badger Apr 14, 2018, 2:29 AM

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when an actor is replicated, it is constructed on server first, then client is instructed to construct its own version, and all the replicated values are... copied over from server to client

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client is also informed of the netID of the actor required to reference it over the network, and sets it

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after that, aside from RPCs and replicated values those actors function independently

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which means both the client's and server's actors will call Tick(), BeginPlay() and similar functions on their own

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when GameMode sets the MatchState, the GameState replicates it, and from there clients are notified they should BeginPlay

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client doesn't need to notify server of anything aside from InputActions and Movement, and Movement works out of the box in CharacterMovementComponent

flat bison Apr 14, 2018, 2:32 AM

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ok so i set run on own client and it works

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custom event set DodgeLeftB to false

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Zlo thats great info ty

winged badger Apr 14, 2018, 2:36 AM

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@flat bison server is the authoritative entity

glacial pollen Apr 14, 2018, 2:36 AM

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While the information is great, I already understood all this. That doesn't explain the nuances like, when server constructs actor, do you set the owner to client, or leave blank?
Why, does the server construct the actor, and in the server begin play, I call add child actor, and the child actor calls begin play on the client?

winged badger Apr 14, 2018, 2:36 AM

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so you shouldn't determine if something happened on a client machine and notify server, with exception of user input

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server owns all actors not otherwise attached to a PlayerController

flat bison Apr 14, 2018, 2:38 AM

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Yea still learning the nuances of server/client interaction Zlo, there's a lot of info out there but sometimes you cannot learn till you do it

winged badger Apr 14, 2018, 2:39 AM

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on the server, every actor has the NetRole ROLE_Authority

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which lets it freely interact with other ROLE_Authority actors

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on the client, PlayerController, its controlled Pawn, any components and/or actors attached to it in any way are owned by the PC

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and have the ROLE_AutonomousProxy

glacial pollen Apr 14, 2018, 2:40 AM

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Are you talking to Trinatis?

winged badger Apr 14, 2018, 2:40 AM

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that allows you to send server RPCs from inside them

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both i think

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i might had misinterpreted your level of familiarity with networking, but that BeginPlay up there looks extremely weird

flat bison Apr 14, 2018, 2:41 AM

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well whatever zlo said helped me immensely rofl

glacial pollen Apr 14, 2018, 2:42 AM

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The beginplay was the result of frustration, not the source of the problem

winged badger Apr 14, 2018, 2:42 AM

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any other actors on client have ROLE_SimulatedProxy

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they can receive information from the server, but cannot send a RPC

flat bison Apr 14, 2018, 2:45 AM

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@winged badger would you know were i could get some good info on jitteriness client side but not thru server

winged badger Apr 14, 2018, 2:46 AM

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good place to start with networking are pinned resources on this channel

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apparently, CMC does poor job of simulating movement when physics gets involved, but i haven't dealt with that

flat bison Apr 14, 2018, 2:47 AM

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well i am getting it in basic sprinting could be just my poor animation setup or my char setup

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ill take a look at the pinned topics tho

winged badger Apr 14, 2018, 2:48 AM

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what do you mean by "do you set the owner to client, or leave it blank" @glacial pollen ?

glacial pollen Apr 14, 2018, 2:49 AM

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If I do this, char-server-beginplay wont run, only client:

📎 unknown.png

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If I remove the ownership, then server will run on both chars, but client will not begin play

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I get either or, never both

winged badger Apr 14, 2018, 2:52 AM

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that is inside the PlayerController BP?

glacial pollen Apr 14, 2018, 2:52 AM

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gamemode

winged badger Apr 14, 2018, 2:53 AM

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does that TMap have valid info when you breakpoint, say DestroyPawn?

glacial pollen Apr 14, 2018, 2:55 AM

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📎 unknown.png

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Works just fine

winged badger Apr 14, 2018, 2:55 AM

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TMap, not the input?

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and do you have any LogSpawn warnings in the output log?

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(ConnectedPlayers variable)

glacial pollen Apr 14, 2018, 2:56 AM

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Also, looks fine:

📎 unknown.png

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eh... forwhatever reason... scratch that. Authority works fine

winged badger Apr 14, 2018, 3:02 AM

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Possess does assign the ownership to the possessing PC

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any attachments and ownerships are replicated by default

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so if actor replicates, so will its relationships to whatever its attached to

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with child actor, if its set to replicate, constructing it on server means it will exist on client and be attached to the "same" parent, provided the parent replicates as well

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you do want to be careful with components/child actors that have a physical representation, as if you are creating them in the constructor, both client and server will create their own separately

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then server will replicate its components/child actors

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and client will end up with 2 sets

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in case of child/attached actors in particular this can really mess your collisions as your client percieves them

glacial pollen Apr 14, 2018, 3:07 AM

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thats a golden nugget

winged badger Apr 14, 2018, 3:08 AM

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(example would be client having a rifle it created and a rifle server replicated - causing client to appear to shoot into the rifle that exists only locally, would pretty much look like its shooting itself)

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while on listen server, from host's perspective everything would look fine

glacial pollen Apr 14, 2018, 3:10 AM

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but as long as I do has authority on construction I should be just fine right?

winged badger Apr 14, 2018, 3:10 AM

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there might be some components that you want only on client

glacial pollen Apr 14, 2018, 3:11 AM

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like the HUD

winged badger Apr 14, 2018, 3:11 AM

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for example, if you made a component that does a forward linetrace, and if that hits an item of interest, make that item display a widget with info locally

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(that example works fine with dedicated servers, but not so well with listen server host, as its only pawn has authority)

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but yes, for components that replicate, you generally want to construct them with authority only

glacial pollen Apr 14, 2018, 3:12 AM

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actor component does not offer Has Auth?

winged badger Apr 14, 2018, 3:13 AM

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solve for the above example is to use branch with checking if Pawn is a LocallyControlledPawn

glacial pollen Apr 14, 2018, 3:13 AM

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k

winged badger Apr 14, 2018, 3:13 AM

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it should be able to figure it out

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never tried it in BP

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but in code it can do GetOwner->Role to get the network role of the owner (and therefore its own)

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so i'd be surprised if it didn't exist in BP

glacial pollen Apr 14, 2018, 3:18 AM

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It does. I'm going through everything and adding has auth as needed

winged badger Apr 14, 2018, 3:22 AM

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you can choose world in world outliner when playing in editor

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from the illuminati icon

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if you choose client, you will see actors/components that exist on client

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and you will also see if you have any doubles you shouldn't

glacial pollen Apr 14, 2018, 3:30 AM

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I appreciate your time. Things are starting to work and I think I'm not seeing red anymore..

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If the actor meshes are set to replicate, and I run this:

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📎 unknown.png

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shouldn't the client meshes also change to that material?

winged badger Apr 14, 2018, 3:38 AM

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material is not replicated like that iirc

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they will set the defaul material in the StaticMeshComponent

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but afterwards, i think DynamicMaterialInstance, replicated variable which is a parameter for the material and a RepNotify function is the way to go

grand kestrel Apr 14, 2018, 8:01 AM

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If I wanted to do something similar to net frequency but for an external service (UE4 sending info out), what would be a good way to do this? FTimerHandle?

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It'd run at about 200hz

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I.e every 0.005 seconds

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(Data is local)

fleet sluice Apr 14, 2018, 8:03 AM

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I'd use a tick and a variable to measure time, with an if to reset that variable when needed instead of FTimerHandle

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I think timers don't work outside of UWorlds (or when they're transitioning)

grand kestrel Apr 14, 2018, 8:04 AM

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Hmm do you know if replication is also tied to tick?

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I might just see where it's sending replicated cars

fleet sluice Apr 14, 2018, 8:06 AM

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More specifically? Replication is done inside UNetDriver::TickDispatch (or UIpNetDriver). You can inherit FObjectTickerBase or FTickable (or others; there are quite a few) and they will tick forever, regardless of UWorlds, replication and anything else

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I made a tickable class IMyModule: public IModuleInterface, public FTickerObjectBase class, for example

grand kestrel Apr 14, 2018, 8:07 AM

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Wait your interface can tick? 😛

fleet sluice Apr 14, 2018, 8:07 AM

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(I may have misspelled some class names here)

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Yea

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Anything can

grand kestrel Apr 14, 2018, 8:07 AM

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That's neat

fleet sluice Apr 14, 2018, 8:07 AM

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Non-UObject

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+1 to the engine this time ✅

grand kestrel Apr 14, 2018, 8:11 AM

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Strange, I can't find the initial declaration of TickDispatch

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The only one that isn't an override isn't virtual either and it's private

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Oh there it is

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Didn't show up in find references

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UNetDriver - ENGINE_API virtual void TickDispatch( float DeltaTime );

thin stratus Apr 14, 2018, 8:14 AM

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I wonder if there are any cool things someone would want in inside the editor in terms of Multiplayer

#

Helpful Editor Extensions

#

Or maybe something for coorperation, e.g. a synced log that shows who's doing what

#

Or a chat

#

idk

grand kestrel Apr 14, 2018, 8:14 AM

#

I can't think of anything abstract enough that I wouldn't have to resort to writing it myself

#

Ahh I see what you mean

thin stratus Apr 14, 2018, 8:15 AM

#

Yeah can be very different what I mean

#

Either actual cooperation stuff inside the editor

grand kestrel Apr 14, 2018, 8:15 AM

#

I'm already passing info between UE4 instances, wouldn't be hard

thin stratus Apr 14, 2018, 8:15 AM

#

Or just usefull stuff for a single user to handle multiplayer better

#

Yeah well it's just sending data

#

and receiving it

grand kestrel Apr 14, 2018, 8:15 AM

#

Have a look at the live link stuff

#

The way they use sockets is helpful

#

I think Apple AR kit has a livelink too

#

Used it for UDP socket connection reference

thin stratus Apr 14, 2018, 8:16 AM

#

That's LAN stuff or ?

grand kestrel Apr 14, 2018, 8:16 AM

#

Any

thin stratus Apr 14, 2018, 8:16 AM

#

Well for in-house communication you could probably just use the message bus system

grand kestrel Apr 14, 2018, 8:16 AM

#

You'll have to open ports I think if you go online

thin stratus Apr 14, 2018, 8:16 AM

#

Given your router supports multicasts

#

Or Broadcasts in that term

grand kestrel Apr 14, 2018, 8:17 AM

#

Well

thin stratus Apr 14, 2018, 8:17 AM

#

Had clients who couldn't use the system cause their routers simply didn't keep a list of connections gg

grand kestrel Apr 14, 2018, 8:17 AM

#

Wanna test it right now? I'll send you a package that connects to my home PC

thin stratus Apr 14, 2018, 8:17 AM

#

Na, wanted to put my Saturday into refactoring stuff

grand kestrel Apr 14, 2018, 8:17 AM

#

Fair enough

thin stratus Apr 14, 2018, 8:18 AM

#

The thought of extending the editor just hit my head, that's why I posted

#

One thing is: Is there something already to properly adjust x windows across the screen?

grand kestrel Apr 14, 2018, 8:18 AM

#

All you'd have to do is download a UE4 project and run it with -log -nullrhi

#

And if you get errors in the log or actual messages it'll be obvious

thin stratus Apr 14, 2018, 8:18 AM

#

E.g. Press Play with 4 players and all 4 windwos get properly placed and sized

grand kestrel Apr 14, 2018, 8:19 AM

#

If you're busy I'll get someone else to, I'm curious now

thin stratus Apr 14, 2018, 8:19 AM

#

Do you need someone to test it or why asking?

grand kestrel Apr 14, 2018, 8:19 AM

#

I'm actively working with this stuff atm which is why I have it setup

#

Nah

#

I don't need to do it outside of LAN

thin stratus Apr 14, 2018, 8:19 AM

#

What is it using though?

grand kestrel Apr 14, 2018, 8:19 AM

#

But your editor plugins got me curious

thin stratus Apr 14, 2018, 8:19 AM

#

Are you actively connecting to your public IP?

grand kestrel Apr 14, 2018, 8:19 AM

#

UDP sockets

#

Yeah

thin stratus Apr 14, 2018, 8:19 AM

#

Welp, just PM me with a download link

grand kestrel Apr 14, 2018, 8:19 AM

#

Well, that would be

thin stratus Apr 14, 2018, 8:20 AM

#

Can start it while coding on something else

#

The coolest thing that someone created was a live map editor

#

Don't know what happened with that

#

It basically synced live what you did in the Map with another person

#

Allowing you two work on it with multiple people

grand kestrel Apr 14, 2018, 8:21 AM

#

I'm sure I'll need to forward the port but I'll try without first

#

It'll take a few to package, I removed the saved folder since last time

thin stratus Apr 14, 2018, 8:22 AM

#

What Engine Version?

#

Or are you sending a package?

grand kestrel Apr 14, 2018, 8:23 AM

#

Yeah package

thin stratus Apr 14, 2018, 8:23 AM

#

Alright

#

Just PM it to me, don't have discord fullscreen atm

grand kestrel Apr 14, 2018, 8:24 AM

#

Will do

#

As for editor tools though

#

Any project I've worked on everyones been doing their own thing

#

Though that might stem from the fact that it's hard to work on the same thing together (due to all the reasons checking out exists in source control)

#

And between Discord in general and it's screen sharing we haven't been wanting for much

thin stratus Apr 14, 2018, 8:27 AM

#

Yeah the "work together on a map" would mainly be for showcasing

#

If I would create/use that, I would assume it's a temporary map file, that can be saved if wanted.

#

So not actually editing the actual map

grand kestrel Apr 14, 2018, 8:28 AM

#

Actually though.. our map is ENORMOUS so we could actually benefit from it with multiple level designers

thin stratus Apr 14, 2018, 8:28 AM

#

Well that kinda screams for levelstreaming

#

So your designers can work on sublevels

grand kestrel Apr 14, 2018, 8:28 AM

#

Yeah, we do have that

#

We struggle to find one good level designer 😄

#

Let alone two+

thin stratus Apr 14, 2018, 8:29 AM

#

I would've thought the multiplayer map working is like showing what you want to do and the other person/s can look around it themselves and correct it or so

grand kestrel Apr 14, 2018, 8:29 AM

#

Ahh

thin stratus Apr 14, 2018, 8:29 AM

#

Cause it think it's easier to just look at it in your own viewport

grand kestrel Apr 14, 2018, 8:29 AM

#

Oh, that's an idea

thin stratus Apr 14, 2018, 8:29 AM

#

than screensharing

grand kestrel Apr 14, 2018, 8:29 AM

#

Think of it in terms of previz in film

#

You could have proxy objects that stream over the socket

thin stratus Apr 14, 2018, 8:29 AM

#

I know someone already created something like this

#

But for actually working together on it

#

Yeah it's just sending simple commands

#

"Spawn object"

#

"Change Location"

#

"Change Rotation"

grand kestrel Apr 14, 2018, 8:30 AM

#

Like imagine a transparent mesh that acts as a layout for something, like a village or w/e, then the level designer can fill it in

fleet sluice Apr 14, 2018, 8:30 AM

#

@grand kestrel Also check UIpNetDriver::LowLevelSend (the other end of replication)

grand kestrel Apr 14, 2018, 8:30 AM

#

Though that's still a lot of work for something not too necessary

#

Will do 😃

thin stratus Apr 14, 2018, 8:30 AM

#

Na it would be a fun little editor plugin

#

To see what one ca do

#

I would probably create a second viewport for that

#

With it's own world and temp map

#

So you can edit it with x people and if you like what you discussed yo ucan save it and work on it

#

Idk, random thoughts

#

Probably no one will buy that haha

grand kestrel Apr 14, 2018, 8:31 AM

#

I remember someone made something similar to postit notes

#

https://www.unrealengine.com/marketplace/fixit

FixIt by Skunkwerks Kinetic in Code Plugins - UE4 Marketplace

FixIt improves project workflow by allowing developers to visually post notes in-engine.

#

4.12 though

thin stratus Apr 14, 2018, 8:32 AM

#

https://www.youtube.com/watch?v=oCAJCqkVntQ

YouTube

Yannick Lange

MultiEdit Plugin 0.2 - Unreal Engine 4 - Collaborative Level Editing

Collaborative level editing in UE4 editor version 0.2. Check out this thread for more information (https://forums.unrealengine.com/showthread.php?50688-Multi...

▶ Play video

grand kestrel Apr 14, 2018, 8:32 AM

#

This thing is still packaging

thin stratus Apr 14, 2018, 8:33 AM

#

Would want to ask Yannick what he ended up doing with that project

grand kestrel Apr 14, 2018, 8:33 AM

#

Forum thread
https://forums.unrealengine.com/community/work-in-progress/21345-multiedit-collaborative-level-editing-plugin?50688-MultiEdit-Collaborative-Level-Editing-Plugin=&highlight=multiedit

MultiEdit - Collaborative Level Editing Plugin - Unreal E...

Building something cool? Tell us about it!

#

Found it in YT comments

#

Seems dead

thin stratus Apr 14, 2018, 8:34 AM

#

I wrote yannick a message

errant vapor Apr 14, 2018, 8:36 AM

#

im replicating an actor with a static mesh component that has simple collision. as it's replicated, the visual mesh ends up in the correct place on client, and if i turn on show collision it appears as if the collider is in the right place too. however, that collider doesn't work, and the 'actual' collider is invisible at location world (0,0,0). if i run as the standalone/listenserver, there's no problem.

#

any ideas whats going on?

thin stratus Apr 14, 2018, 8:39 AM

#

Are you moving the Actor?

#

Are you replicating movement?

errant vapor Apr 14, 2018, 8:40 AM

#

the actor is not being moved on client. ive tried both with repmovement on and off

#

its also not being moved on server except for the initial spawn

plain flume Apr 14, 2018, 11:41 AM

#

Hello. Anybody can tell what is the correct way to create a replication when using the Dedicated server? For example, even if the actor is replicated and the server changes some material, that isn't replicated until it is multicasted to clients. What about if client joins in midgame, how would the new material is passed to player? Do I just create a replicated material variable and set that in BeginPlay or what? Thank you.

thin stratus Apr 14, 2018, 11:43 AM

#

That's what RepNotify is for

#

Don't use Multicast for things that late joiners need

#

Multicast is fire and forget

#

You fire it and if someone didn't get that call, then you don't care

plain flume Apr 14, 2018, 11:44 AM

#

Aah! Hey, so if I ust RepNotify does that run the function automatically when later joining the game?

thin stratus Apr 14, 2018, 11:44 AM

#

If you want others, that come in late or get relevant later (e.g. they were too far away) need to get the call too, then you use RepNotify

#

Yes

plain flume Apr 14, 2018, 11:44 AM

#

Great!!

thin stratus Apr 14, 2018, 11:44 AM

#

It runs when the variable gets replicated

plain flume Apr 14, 2018, 11:44 AM

#

Thank you

thin stratus Apr 14, 2018, 11:44 AM

#

No biggie

plain flume Apr 14, 2018, 11:47 AM

#

@It runs when the variable gets replicated , Yes, I have been using it for that, but didn't know it will run the function when people are joining the game. So just to be clear. At 11:30, server changes bVariable to True and It will run function X. At 12:40, new player joins game and it will automatically run Function X, even if server changed it beforehand

thin stratus Apr 14, 2018, 11:56 AM

#

To make this clear

#

The function calls on the entity that receives the replicated value

#

E.g. 11:30:00: Server sets bVariable to TRUE. -> 11:30:01 (Ping): Client1 receives value and calls OnRep. -> 11:45:00: Client2 joins late, receives the value and calls OnRep

verbal wave Apr 14, 2018, 12:30 PM

#

Actor.h

    UFUNCTION(BlueprintAuthorityOnly, BlueprintCallable, Category="Networking")
    virtual void ForceNetUpdate();```
So.. Is there a similar function for client to force send update to server?

plain flume Apr 14, 2018, 12:36 PM

#

@thin stratus Yes. Thanks. Just tested it in action. Works perfectly. That was much easier than I thought!

fleet sluice Apr 14, 2018, 12:36 PM

#

@verbal wave The networking model used by UE4 is designed to explicitly forbid client-to-server updates, with the exception of RPCs.

verbal wave Apr 14, 2018, 12:36 PM

#

@fleet sluice oh.. right.. duh

fleet sluice Apr 14, 2018, 12:36 PM

#

If it allowed client-to-server updates, everyone could cheat in any game, very easily.

verbal wave Apr 14, 2018, 12:39 PM

#

@fleet sluice I think I had a brain fart 🐸
so is this used for replicated UPROPERTY update only?

fleet sluice Apr 14, 2018, 12:40 PM

#

I don't remember ever using it so I can only assume it gathers all the replicated UPROPERTYs and updates the clients for which the said actor is relevant. I'm guessing @thin stratus knows for sure.

verbal wave Apr 14, 2018, 12:41 PM

#

I'm digging into the source but it's getting too lowlevel for me :]

fleet sluice Apr 14, 2018, 12:41 PM

#

I think it could also be forcing RPCs to be dispatched when the said function is called, but again, it's just a guess.

#

What are you trying to achieve?

verbal wave Apr 14, 2018, 12:42 PM

#

had a problem where an OnRep function has delay on client. Solved it by turning up min net update frequency in the BP options

fleet sluice Apr 14, 2018, 12:43 PM

#

I've worked with the low level networking code a lot (lower than your function example) and I think it's unlikely you'll need any significant change in it, for general purposes

verbal wave Apr 14, 2018, 12:43 PM

#

saw ForceNetUpdate() just now and think it could be a better solution. Just call it when I need OnRep excuted immediately

fleet sluice Apr 14, 2018, 12:43 PM

#

Ah I see

verbal wave Apr 14, 2018, 12:45 PM

#

Just trying to have a glimpse of how things should be. Do I sound sane to you?

winged badger Apr 14, 2018, 12:46 PM

#

i think it will just put the actor onto the "stack" for replication regardless of the NetUpdateFrequency

#

question is: why do you have to force replication?

verbal wave Apr 14, 2018, 12:51 PM

#

for example if I need a holograph turned on when player holds trigger so everyone can see it.
UPROPERTY(ReplicatedUsing=OnRep_bIsHoldingTrigger)
bool bIsHoldingTrigger;

#

And this holograph is very important and I need it to be as responsive as possible

#

I think setting both min and max net update frequency to 100 is gonna tank the pipe?

winter plover Apr 14, 2018, 12:52 PM

#

you want it to be displayed as soon as someone fires the trigger right?

verbal wave Apr 14, 2018, 12:52 PM

#

so calling ForceNetUpdate() everytime the trigger is changed seems to be the most resonable

winter plover Apr 14, 2018, 12:52 PM

#

for the player who does it?

verbal wave Apr 14, 2018, 12:53 PM

#

yes and I need a OnRep function to do it

#

not an RPC

winter plover Apr 14, 2018, 12:53 PM

#

I'd just already start updating the variable clientside as soon as it happens

#

so the triggering player gets an immediate response

#

everyone else has it slightly delayed

#

not really any other way around it

verbal wave Apr 14, 2018, 12:54 PM

#

I need everyone else to see it SUPER FAST

winter plover Apr 14, 2018, 12:54 PM

#

no point in bruteforcing higher priorities

#

thats not gonna help with latency

#

you gotta design around it so it's the least noticable

verbal wave Apr 14, 2018, 12:54 PM

#

this is the core mechanism. I'm just using this holograph thing for example

winter plover Apr 14, 2018, 12:55 PM

#

is your trigger a button or a zone?

verbal wave Apr 14, 2018, 12:55 PM

#

actually it's a magic circle that players can draw spells in it

fleet sluice Apr 14, 2018, 12:55 PM

#

Player A activates the hologram and B, C, D etc. need to see it as soon as possible?

verbal wave Apr 14, 2018, 12:55 PM

#

and it's made to be manipulated very fast, twitch-like

#

yea a 20ms more delay affects the game feel negatively

winter plover Apr 14, 2018, 12:56 PM

#

as a rule of thumb, delays are usually already as short as they can possibly be, and latency is just an unfortunate reality you have to deal with

#

really the best you can do is to try and make these unnoticable

#

you cannot break the laws of physics

verbal wave Apr 14, 2018, 12:57 PM

#

that's why I'm calling ForceNetUpdate() ..

winter plover Apr 14, 2018, 12:57 PM

#

thats not gonna help

#

the update still has to physically travel over the net

verbal wave Apr 14, 2018, 12:57 PM

#

{
    AController* const OldController = Controller;

    ForceNetUpdate();

fleet sluice Apr 14, 2018, 12:58 PM

#

Then:

1 - Player A sends and RPC to the server (reliable, RunOnServer)
2 - Servers calls another RPC (reliable, Multicast; this will update all other clients)

winter plover Apr 14, 2018, 12:58 PM

#

what I personally would try is to just to predict the trigger on the client who causes it

#

so that theres atleast a quick response to the input

fleet sluice Apr 14, 2018, 12:58 PM

#

And that's all you need to do. Don't try to force things

winter plover Apr 14, 2018, 12:58 PM

#

but everyone else has to wait for the update

#

they probably wont notice anyhow

#

cuz they arent pressing the button

verbal wave Apr 14, 2018, 12:58 PM

#

same thing. I need it to happen fast, similar to when you get killed and set to observer mode

winter plover Apr 14, 2018, 12:58 PM

#

or w/e it is

verbal wave Apr 14, 2018, 12:59 PM

#

real situation is a little more complicated. I'm actually using a OnRep function to initialize the spell actor spawned by player (via server RPC)

#

this OnRep function replicates a USTRUCT which contains necesary information to represent the spell

fleet sluice Apr 14, 2018, 1:00 PM

#

It will happen in a matter of X+Y (or X+Z) ms, where X is the latency between A and the server and Y/Z are the latencies between the server and clients B, C. If you really really really want something extra, the server needs to be the one to call ForceNetUpdate, which may lower Y/Z latencies by a few more ms, but ultimately, this won't be noticeable.

verbal wave Apr 14, 2018, 1:01 PM

#

since actor pointer can't be send directly via RPC, replicatd uproperty is the only way to do it

winter plover Apr 14, 2018, 1:01 PM

#

wait what

#

im p sure you can send actor pointers over the net

#

they get translated on the fly by ue4

#

interface pointers you cant, but actors definitely

#

(and even getting around that is trivial)

winged badger Apr 14, 2018, 1:02 PM

#

you can reference actors over the network

#

there is a section in unreal networking docs about it that explains the limitations, but they aren't many

verbal wave Apr 14, 2018, 1:03 PM

#

wait what really. That was a lot of the time in the drain. I double confirmed that I couldn't

winged badger Apr 14, 2018, 1:03 PM

#

when an actor is replicated

#

it has the same netid on client and server

#

that is what RPC sends as an argument instead of the pointer

#

in addition you can reference non-replicated actors that are stably named

#

as in loaded from the package, not spawned in runtime

fleet sluice Apr 14, 2018, 1:04 PM

#

This may sound like a dumb observation, but maybe you tried to replicate a pointer on a non-replicated actor...? +1 to Zlo, they can be replicated.

verbal wave Apr 14, 2018, 1:08 PM

#

@winged badger that sounds like a lot of sense.. thanks

#

@fleet sluice I'm not that dumb lol.. (or am I?) now I think of it maybe it's because I send the RPC immediately after the new replicated actor is spawned and it's not property setup yet

winged badger Apr 14, 2018, 1:10 PM

#

if you send it from inside the actor that can't happen

fleet sluice Apr 14, 2018, 1:10 PM

#

It's not about dumbness. Just rare slips in anyone's life

verbal wave Apr 14, 2018, 1:10 PM

#

basically this. When a new player enters, because he never cast a spell yet, the update rate is 2 times / second

📎 unknown.png

fleet sluice Apr 14, 2018, 1:10 PM

#

Try to mark it as "Reliable"

verbal wave Apr 14, 2018, 1:10 PM

#

after the first cast it becomes responsive

fleet sluice Apr 14, 2018, 1:11 PM

#

If you send a "Reliable" RPC, even on server's BeginPlay, it will still reach the client. If I remember correctly, the RPC can fire on the client even before the client's own BeginPlay, but that's just a subtlety from ages ago

verbal wave Apr 14, 2018, 1:11 PM

#

I can just set this to 10 or something but think ForceNetUpdate() is a better solution (since it has a cooldown - can't be spammed)

winged badger Apr 14, 2018, 1:12 PM

#

reliable is for stuff that has to get there, even if late

#

good point of reference there is that all ServerMove functions in CMC are unrealiable

verbal wave Apr 14, 2018, 1:18 PM

#

Okay just to confirm.. there is no problem to send this struct as RPC parameter. SpellBoard will actually be the reference to a replicated ANyxSpellBoard for all clients?

📎 unknown.png

#

Alright thanks guys for answering here's a photo of my cat

📎 unknown.png

winged badger Apr 14, 2018, 1:30 PM

#

it looks ready to pounce

#

and if that struct is a replicated UPROPERTY, it should replicate just fine

#

enum for ElementType would be cheaper tho

#

any text is massive compared to a byte

fleet sluice Apr 14, 2018, 1:34 PM

#

I love cats ✅

verbal wave Apr 14, 2018, 1:42 PM

#

ElementType is only used once per round so not really worth it 😃

thin stratus Apr 14, 2018, 2:35 PM

#

@verbal wave @Vlad#1167 It basically forces an update, even if it's not yet time

#

void APBGameState_Base::SetMatchTime(int32 NewMatchTime)
{
    MatchTime = NewMatchTime;
    RemainingTime = MatchTime;
    ReplicatedRemainingTime = MatchTime;
    ForceNetUpdate();
}

halcyon abyss Apr 14, 2018, 2:54 PM

#

Does anyone know where I can go and controler the Gamepad to player controller assignment?

#

Does anyone know where I can go and change the Gamepad to player controller assignment?

fallen oracle Apr 14, 2018, 3:14 PM

#

Hello.
I've been trying to implement a dodge move, which overwrites the current velocity while it's in effect. My game is multiplayer, so I need to do it with a replicable manner.
I implemented my own CharacterMovementComponent. The main part of my code is this:

{
    Super::OnMovementUpdated( DeltaSeconds, OldLocation, OldVelocity );
       if( bWantsToDodge )
    {
        bWantsToDodge = false;

        MoveDirection.Normalize();
        DodgeDirection = MoveDirection;
        DodgeRemainingTime = DodgeLength;
    }

    if( bWantsInterruptDodge )
    {
        bWantsInterruptDodge = false;
        DodgeRemainingTime = 0.0f;

        Velocity.X = Velocity.Y = 0.0f;
    }

    if( DodgeRemainingTime > 0.0f )
    {
        DodgeVelocity = CharacterOwner->GetControlRotation().RotateVector( DodgeDirection );
        DodgeVelocity.Normalize();

        const float fOrigZVel = Velocity.Z;
        Velocity = DodgeVelocity * DodgeForce;
        Velocity.Z = fOrigZVel;

        DodgeRemainingTime -= DeltaSeconds;
    }
}```
My problem is, that when the server does it, it works correcly, but when the client, its moving much slower, and the movement is jittering. Probably because the client moves slower than the server wants and its adjusting its position.
However the strange  thing is, if the client is in air( after jump ), its working as intended. Can make a video about it, if it's not clear.

#

I checked and all the variables are replicated correclty( DodgeDirection and control rotation )

#

DodgeForce is a constant, DodgeLength too

#

It's almost as if the control on the client tries to move into the ground, and that slows down the movement

tawdry goblet Apr 14, 2018, 3:52 PM

#

@fallen oracle Use launch it's a way to change the velocity that is replicated and marked as a pending move.
The reason why it jittering it's because the server can't replicate the velocity change and it send some message to correct the position of the client character.

fallen oracle Apr 14, 2018, 3:53 PM

#

Server should be having the same information about the dodge

#

Launch is just a one time fire, cant effect its duration

tawdry goblet Apr 14, 2018, 3:54 PM

#

you can use it to hard set to the desired velocity at each frame it's not perfect but it will work fine

fallen oracle Apr 14, 2018, 3:55 PM

#

thats what im doing at the above code

#

but its not working

#

it's as if the ground friction on client is calculated differently, or i dont know..

tawdry goblet Apr 14, 2018, 3:57 PM

#

velocity is not replicated and if you just replicate bWantsToDoge it may feel wrong also (sometimes)

#

hum

#

Velocity = DodgeVelocity * DodgeForce;
Velocity.Z = fOrigZVel;
This can be easily change for a launch XD

#

https://docs.unrealengine.com/en-us/Gameplay/Networking/CharacterMovementComponent

vivid siren Apr 14, 2018, 4:00 PM

#

hey could someone direct me to a decent learning resource for understanding networking? i've gone through exi's pdf and asked many questions but I still have trouble doing things that seem like they should be simple.
exi's stuff was great but i just suck, lol

fallen oracle Apr 14, 2018, 4:00 PM

#

Can be changed yes, but the result wont be the same, at all

#

I'm using the exactly the same method you linked

tawdry goblet Apr 14, 2018, 4:02 PM

#

What launch do by default is appending a vector to the velocity. But there is some Boolean parameters that you can mark to true and it will set the velocity

fallen oracle Apr 14, 2018, 4:04 PM

#

There is no parameter for launch

#

For the sake of test i tried to replace the velocity change with launch

#

now it moves the same distance, but still jittering

tawdry goblet Apr 14, 2018, 4:06 PM

#

hum your right (look's like there is no parameter in c++)

fallen oracle Apr 14, 2018, 4:07 PM

#

And launch changes the movement mode to falling, which is not intended

fallen oracle Apr 14, 2018, 4:27 PM

#

Hmm, seems like the jittering was because of the server calling "UFoobarCharacterMovementComponent::OnMovementUpdated" much less times than the control, it's skipping frames so the dodge was "longer" on server side than on client side

#

but still, if the client does the dodge, the movement is slower

fallen oracle Apr 14, 2018, 4:56 PM

#

Maybe my whole approach is bad. Anyone have experience with dodge moves?
trying to implement a dodge system like this: https://www.youtube.com/watch?v=I2Q0wsZeURo

YouTube

ReeQo89

S4 League - Dodge Cancel Tutorial

this video contains tutorial about, Dodge Cancel, Hyper Dodge, Mix Dodge, Dodge Sprint, Air Sprint.. the major thing is : Sorry for my bad english lol..

▶ Play video

runic hamlet Apr 14, 2018, 5:02 PM

#

does anyone have experience with multiplayer vehicles? is vehicle movement replication on par with character movement?

hidden thorn Apr 14, 2018, 5:21 PM

#

Would this call make sense?

#

On the client call a Server RPC, inside it call a ClientRPC and inside this call a ServerRPC

#

the reason why I need the client rpc call is because there is a value only updated on the client

jolly siren Apr 14, 2018, 5:22 PM

#

why not send the value in the first server rpc then?

winged badger Apr 14, 2018, 5:23 PM

#

or replicate OWNER_ONLY?

hidden thorn Apr 14, 2018, 5:26 PM

#

If you look at This Line, that is different on each client/server so calling that in a ServerRPC I would get different results.
GetLoadoutIDs is populated somewhere else inside a ClientRPC. Player inventory is replicated but the NPC is just one on the server that's why it will have different LoadoutIDs

void ARPGPlayerState::Server_NPC_Implementation(ANPC* NPC)
{
    if (Player->GetPlayerInventory() != nullptr)
    {
        for (int i = 0; i < NPC->GetLoadoutIDs().Num(); i++) // <- This line
        {
            UE_LOG(LogTemp, Display, TEXT("NPC->GetLoadoutIDs()"));

            for (int j = 0; j < Player->GetPlayerInventory()->GetInventoryList().Num(); j++)
            {
                if (NPC->GetLoadoutIDs()[i] == Player->GetPlayerInventory()->GetInventoryList()[j]->GetUniqueID())
                {
                    Player->GetPlayerInventory()->RemoveItem(...);
                    break;
                }
            }
        }
    }
}

#

I know I could pass the array as a parameter @jolly siren and I will prob to that as it seems like the most sensible thing to do

random verge Apr 14, 2018, 5:47 PM

#

What do you guys think about the idea of having a "replication component" to be the primary replication manager for all replicated actors/pawns rather than typical replication/RPCs?
I think while it would make things tightly coupled to the component, centralizing all replication into a single component would make managing replication easier. Being able to optimize bandwidth usage, control exactly when replication happens etc.

#

and also, aware of anyone doing this already?

thin stratus Apr 14, 2018, 5:52 PM

#

:P I dislike it

#

Classes should manage their own Replication

#

You have actors that should be non-relevant etc.

random verge Apr 14, 2018, 6:05 PM

#

I'm looking at it as a way to sort of emulate your own packet management

#

relevancy could still be managed, unless I'm misunderstanding what you mean

thin stratus Apr 14, 2018, 6:15 PM

#

Well you already have a strong base where Actors can be relevant, have owners, etc etc.

#

Managing all network data through one Component wouldn't even work with that

#

I also don't see any gain from doing that

#

It would all clutter up in one single class

random verge Apr 14, 2018, 6:27 PM

#

The way I'm envisioning it, it would be possible to manage prioritization of replicated data, set net update frequency for specific types of data, queuing data when needed. True bandwith management. I'm not sure how well it could actually work but it's definitely peaked my curiosity.

#

Its just theoretic. I'm sure it would be a real mofo to do, and to do right

#

because honestly, UE4s networking is super chatty. I really don't think its very efficient

winged badger Apr 14, 2018, 7:11 PM

#

you do have a UActorChannel

#

that mosly does that already

#

its 1 per PC

#

it figures out what to send to its associated client

#

it also handles prirotizing if the network is congested

high nebula Apr 14, 2018, 7:13 PM

#

My current project will likely be co-op, is there a FAQ of things to consider when doing multiplayer?

winged badger Apr 14, 2018, 7:14 PM

#

there are some pinned resources on this channel that most find useful

#

if you're just startng i recommend Cedric's bible

high nebula Apr 14, 2018, 7:15 PM

#

awesome, thanks 😃

winged badger Apr 14, 2018, 7:16 PM

#

and if you get stuck, just ask here 😃

high nebula Apr 14, 2018, 7:17 PM

#

I just started my project, so I plan to get a SP experience going before implementing MP, but I think I heard someone say you should plan for networking right from the start

winged badger Apr 14, 2018, 7:17 PM

#

speaking from experience, that someone was right

thin stratus Apr 14, 2018, 7:17 PM

#

You don't want to do SP and then MP

#

You want to do both at once

#

SP is usually just MP without clients

#

So MP -> SP is easy

#

SP -> MP not

winged badger Apr 14, 2018, 7:18 PM

#

the basic stuff like movement works out of the box with CharacterMovementComponent

high nebula Apr 14, 2018, 7:19 PM

#

ok. hmm

winged badger Apr 14, 2018, 7:19 PM

#

so yeah, it will be a bit more learning at first

#

but in the long run, well worth it

high nebula Apr 14, 2018, 7:20 PM

#

heh, yeah thats why I always stuck to SP, the learning. 😃 my current project would be more fun with MP

#

kinda a Streets of Rogue clone. as the base idea

#

Am I going to be really limited sticking to blueprints? in ways other than performance?

winged badger Apr 14, 2018, 7:27 PM

#

what is your programming background?

high nebula Apr 14, 2018, 7:27 PM

#

blueprints :/ I learned basic C, php years go, but only the basics of C

winged badger Apr 14, 2018, 7:28 PM

#

then you're likely to be stuck with blueprints for a while

thin stratus Apr 14, 2018, 7:28 PM

#

Welp, then do what you think is best for yourself in terms of learning

#

But I can kinda guarantee you that the code you create needs a few refactors

#

Like bigger ones

#

Cause it takes a while until you get how all of the classes really work together

winged badger Apr 14, 2018, 7:28 PM

#

blueprints do have some limitations that c++ doesn't share

#

rule of thumb: when those start to annoy you its time to start swithing to c++

thin stratus Apr 14, 2018, 7:29 PM

#

Last few days I'm looking throw the UT Source Code

#

And C++ has tons of nice functions that BPs don't have

#

Just the GameMode alone

#

*.*

high nebula Apr 14, 2018, 7:31 PM

#

right now my project is basically the twinstick example, but with an extra attack, and some changes, so it'll be a good place to start learning MP

winged badger Apr 14, 2018, 7:33 PM

#

that it will

glacial pollen Apr 14, 2018, 7:35 PM

#

unreal refuses to respect component ownership

#

Just fine

📎 unknown.png

#

Just fine

#

📎 unknown.png

#

📎 unknown.png

thin stratus Apr 14, 2018, 7:39 PM

#

BeginPlay is too early

glacial pollen Apr 14, 2018, 7:41 PM

#

This illogical shit is driving me nuts. How can begin play be early? Like how does someone begin play if they don't own anything! ugh

hidden thorn Apr 14, 2018, 7:42 PM

#

I guess you can add a delay node in there

thin stratus Apr 14, 2018, 7:42 PM

#

No you don't

#

You use the EventPossessed

#

At which point it has a Valid Controller and Owner

glacial pollen Apr 14, 2018, 7:42 PM

#

oh

thin stratus Apr 14, 2018, 7:42 PM

#

It's not "illogical shit"

glacial pollen Apr 14, 2018, 7:44 PM

#

Yes it is. First, begin play should mean exactly that. Shouldn't be "to early" if it has an owner. I may not want controller input to run, but everything else should still work. Second, I shouldn'

#

t need to posses to put a widget on their screen

thin stratus Apr 14, 2018, 7:44 PM

#

¯_(ツ)_/¯

glacial pollen Apr 14, 2018, 7:44 PM

#

Also, I don't see how player 1 can own the character during begin play, but the server still owns the components

#

And if begin play is too early, then why bother letting the local owner have a begin play if it doesnt even own it

severe widget Apr 14, 2018, 7:50 PM

#

Play has started for the locally present actor, however not all of the networking/possession stuff has been set up

glacial pollen Apr 14, 2018, 7:50 PM

#

I dont want networking

#

I just want to add to the local viewport

#

this is before possession

severe widget Apr 14, 2018, 7:51 PM

#

¯_(ツ)_/¯

thin stratus Apr 14, 2018, 7:51 PM

#

Then use the PlayerController

glacial pollen Apr 14, 2018, 7:52 PM

#

That makes even less sense...

thin stratus Apr 14, 2018, 7:52 PM

#

You can argue as much as you want, but the proper way is to use the Possess Event

severe widget Apr 14, 2018, 7:53 PM

#

You're asking how things work, then when people who know how they work tell you how it works, you throw your hands up and go but that's dumb

glacial pollen Apr 14, 2018, 7:54 PM

#

Yea.. I know..

winged badger Apr 14, 2018, 8:02 PM

#

btw, in most cases PlayerController won't have a valid Pawn possessed on BeginPlay yet

#

just figured i should mention that, too

high nebula Apr 14, 2018, 8:03 PM

#

thats burned me so many times even in my SP games

meager spade Apr 14, 2018, 8:16 PM

#

LogNet: Warning: UIpNetDriver::ProcessRemoteFunction: No owning connection for actor BP_Player_C_1. Function ServerSetIsJumping will not be processed.

#

{
    // Go to standing pose if trying to jump while crouched
    if (bIsCrouched && NewJumping)
    {
        UnCrouch();
    }
    else if (NewJumping != bIsJumping)
    {
        bIsJumping = NewJumping;

        if (bIsJumping)
        {
            /* Perform the built-in Jump on the character */
            Jump();
        }
    }

    if (Role < ROLE_Authority)
    {
        ServerSetIsJumping(NewJumping);
    }
}

#

am i doing something wrong?

winged badger Apr 14, 2018, 8:24 PM

#

according to your error

#

that AZPlayer is not owned by your PlayerController

meager spade Apr 14, 2018, 8:36 PM

#

BP_Player_C_1 is the listen server

winged badger Apr 14, 2018, 8:37 PM

#

the call to ServerSetIsJumping shold not had been triggered then

#

the listen server host does not have a net connection

#

unless some client erroneously called the ServerSetIsJumping on host's player

meager spade Apr 14, 2018, 8:39 PM

#

it happens when i jump on the listen server, doesn't show up when i do it on the client

#

i will run it through debugger and fin d out

#

no idea why that is happening

gleaming bobcat Apr 14, 2018, 8:56 PM

#

Hello. I have some issue when my AnimNotify (NotifyBegin) is sometimes not called.

#

📎 unknown.png

#

On server side

#

Anybody can help ?

meager spade Apr 14, 2018, 8:57 PM

#

that doesn't really help though, it's just a notify. what is the notify doing?

#

doe's it ever get triggered?

gleaming bobcat Apr 14, 2018, 8:59 PM

#

Spawning projectile

#

usually it's triggered but sometimes not

#

the animation is played but notify not trigered

#

sometimes

#

Quite frustrating

#

On client side it's always triggered

winter plover Apr 14, 2018, 9:08 PM

#

did you make sure the animation actually runs on the server?

#

ie. by running as a listen server?

#

or other checks

gleaming bobcat Apr 14, 2018, 9:10 PM

#

Well I need to test it. I have suspicion that this only one explanation

winter plover Apr 14, 2018, 9:11 PM

#

running as a listen server is usually a pretty quick and dirty way of finding out

gleaming bobcat Apr 14, 2018, 9:11 PM

#

it's possible to see in animation blueprint debugging but only in single process

winter plover Apr 14, 2018, 9:12 PM

#

otherwise I just do a debug print around the command that was supposed to do it

#

see if it ever gets reached

gleaming bobcat Apr 14, 2018, 9:12 PM

#

this is happening only in not single process

winter plover Apr 14, 2018, 9:12 PM

#

huh

gleaming bobcat Apr 14, 2018, 9:12 PM

#

I am using this

#

📎 unknown.png

winter plover Apr 14, 2018, 9:13 PM

#

did you check whether or not your transition condition behaves properly?

gleaming bobcat Apr 14, 2018, 9:13 PM

#

but debug this for dedicated server with

#

📎 unknown.png

#

does not work

#

the values are set correctly to enter the animation

winter plover Apr 14, 2018, 9:16 PM

#

mhmm, I'm out of ideas then

gleaming bobcat Apr 14, 2018, 9:19 PM

#

Can't reproduce the issue without dedicated server

sharp spire Apr 14, 2018, 9:19 PM

#

can someone explain PlayerState a little more to me? i understand that it exists on each client for every player in game, so how would you handle using PlayerState? Begin play -> Print string simply plays * the amount of times of clients connected

winter plover Apr 14, 2018, 9:27 PM

#

The playerstate is basically a representation of your player's info to everyone

#

This can include stuff like a playername

#

or a score

sharp spire Apr 14, 2018, 9:29 PM

#

would you keep an inventory in there?

winter plover Apr 14, 2018, 9:29 PM

#

no

#

I would keep that attached to the player character

loud mountain Apr 14, 2018, 9:29 PM

#

depends if you want to have your inventory cleared on player death

sharp spire Apr 14, 2018, 9:29 PM

#

i do not

loud mountain Apr 14, 2018, 9:29 PM

#

then you could do that inside a playerstate

winter plover Apr 14, 2018, 9:29 PM

#

then you would put it in the character

#

anything else that persists usually goes in the playerstate

#

it basically exists until you disconnect

loud mountain Apr 14, 2018, 9:30 PM

#

not all info always persists

#

Playerstates are being saved for reconnects

#

up to 600 seconds by default I believe

winter plover Apr 14, 2018, 9:30 PM

#

oh are they?

#

well nvm that then

loud mountain Apr 14, 2018, 9:31 PM

#

also you can persist data in between levels

#

if using seamless travel

sharp spire Apr 14, 2018, 9:31 PM

#

using the playerstate, correct?

loud mountain Apr 14, 2018, 9:32 PM

#

its 300 seconds by default ^^

sharp spire Apr 14, 2018, 9:32 PM

#

how does the playerstate get referenced/reference its controller?

loud mountain Apr 14, 2018, 9:32 PM

#

its a variable inside your controller

#

get playerstate in BP

winter plover Apr 14, 2018, 9:32 PM

#

playerstates are attached to the controller yea

#

which on the server you can fetch from the gamestate player table

#

iirc

sharp spire Apr 14, 2018, 9:33 PM

#

ooh thank you

#

what is iirc

winter plover Apr 14, 2018, 9:33 PM

#

if I remember correctly

sharp spire Apr 14, 2018, 9:34 PM

#

so you wouldnt necessarily run any script through the playerstate, correct?

winter plover Apr 14, 2018, 9:34 PM

#

but yea in geeeneral you dont wanna keep gameplay critical stuff there unless you wanna have it persist between character deaths

#

also what do you mean by script?

#

do you mean if a playerstate can have functions?

sharp spire Apr 14, 2018, 9:34 PM

#

any functions or nodes*

winter plover Apr 14, 2018, 9:35 PM

#

p sure you can yea

sharp spire Apr 14, 2018, 9:35 PM

#

i know it can, i have it opened lol

#

but wouldnt that be useless?

winter plover Apr 14, 2018, 9:35 PM

#

depends on what you are trying to do

loud mountain Apr 14, 2018, 9:35 PM

#

you shouldn't spawn your items and stuff

winter plover Apr 14, 2018, 9:35 PM

#

it's mostly useful for storing stuff

loud mountain Apr 14, 2018, 9:35 PM

#

but you can keep the references to them

sharp spire Apr 14, 2018, 9:35 PM

#

oh so like a savegame function?

#

can you access the playercontroller from within the playerstateBP?

winter plover Apr 14, 2018, 9:36 PM

#

uhh not really I think

#

its mostly for networked games

loud mountain Apr 14, 2018, 9:36 PM

#

getOwner does that for you

#

but you need to cast it

sharp spire Apr 14, 2018, 9:36 PM

#

im working on a MP game atm

#

getowner gets the owning controller?

loud mountain Apr 14, 2018, 9:36 PM

#

yes

sharp spire Apr 14, 2018, 9:36 PM

#

actor

#

oops

#

didnt mean to type actor lol

loud mountain Apr 14, 2018, 9:37 PM

#

which (usually) is the (player) controller

sharp spire Apr 14, 2018, 9:38 PM

#

aaah yes it did return my topdown controller 😃

#

so would you say; health would be a playerstate item?

#

variable* not itrem

loud mountain Apr 14, 2018, 9:39 PM

#

nah not really

#

health is something I would put into my pawn

winter plover Apr 14, 2018, 9:39 PM

#

put your gameplay stuff in the character/pawn

sharp spire Apr 14, 2018, 9:39 PM

#

ooh ok

winter plover Apr 14, 2018, 9:39 PM

#

the state is for everything specific to the actual player

#

such as a username

#

or a score

loud mountain Apr 14, 2018, 9:39 PM

#

playerstate is stuff like (persistent) inventory or scores for example

sharp spire Apr 14, 2018, 9:39 PM

#

why would the health be persistent?

loud mountain Apr 14, 2018, 9:39 PM

#

in a moba you would store the kills, deaths, assists and stuff

sharp spire Apr 14, 2018, 9:40 PM

#

wouldnt*

winter plover Apr 14, 2018, 9:40 PM

#

@sharp spire it isnt

#

if your character/pawn dies

#

you spawn a new one

sharp spire Apr 14, 2018, 9:40 PM

#

but if you bswitch maps where does it keep in mind what your health was before?

winter plover Apr 14, 2018, 9:40 PM

#

it would carry over the pawn itself

#

ideally

sharp spire Apr 14, 2018, 9:41 PM

#

oh the pawn carries over between levels?

winter plover Apr 14, 2018, 9:41 PM

#

if you make it so yea

#

should be possible

thin stratus Apr 14, 2018, 9:42 PM

#

You could make the Pawn to be seamless

loud mountain Apr 14, 2018, 9:42 PM

#

you could mark it for the seamless travel actors

sharp spire Apr 14, 2018, 9:42 PM

#

actors can be made seamless as a whol;e?

#

sorry my son keeps hitting my keyboard...

thin stratus Apr 14, 2018, 9:43 PM

#

Yeah, however that's not exposed to BPs

#

You should use the PlayerState to handle taking over data

#

That has "CopyProperties"

#

Which gives you new and hold state

sharp spire Apr 14, 2018, 9:45 PM

#

so setting up the playerstate to handle the majority of player variables seems like the best option. what player related things wouldnt need to be travelled?

#

thats what gets me with playerstate

thin stratus Apr 14, 2018, 9:46 PM

#

Everything you don't need in the next level

#

Usually this whole thing is for taking over score and such stuff

sharp spire Apr 14, 2018, 9:46 PM

#

making an openworld mmorpg with instances occasionally

thin stratus Apr 14, 2018, 9:46 PM

#

Öhm

loud mountain Apr 14, 2018, 9:46 PM

#

hah

thin stratus Apr 14, 2018, 9:47 PM

#

UE4 is not really build for that out of the box :D

#

It's more for games like Unreal Tournament

#

So don't expect any functions to be helpfull for you there

sharp spire Apr 14, 2018, 9:47 PM

#

like ark for example, sorry not massive scaled

thin stratus Apr 14, 2018, 9:47 PM

#

ARK is only one map

sharp spire Apr 14, 2018, 9:47 PM

#

but ark could easily have instances

#

is that why it doesnt?

high nebula Apr 14, 2018, 9:48 PM

#

When I hit play with 2 players, I'm getting two huds on the main client/listen server, nothign in the second window...

loud mountain Apr 14, 2018, 9:48 PM

#

so more like skyrim but with multiplayer?

sharp spire Apr 14, 2018, 9:48 PM

#

yes i guess lol

thin stratus Apr 14, 2018, 9:48 PM

#

UE4 can't easily have instances

#

At least not without some service properly setting up servers

#

Each server can only hold one world

loud mountain Apr 14, 2018, 9:49 PM

#

yeah having two maps loaded is an issue

thin stratus Apr 14, 2018, 9:49 PM

#

So one map per server

#

At any given time

sharp spire Apr 14, 2018, 9:49 PM

#

well thats quite the limitation now isnt it...

thin stratus Apr 14, 2018, 9:49 PM

#

If you change map, everyone moves

#

You know Borderlands?

sharp spire Apr 14, 2018, 9:49 PM

#

briefly

#

:\

thin stratus Apr 14, 2018, 9:49 PM

#

UE game

#

You had to move with everyone

sharp spire Apr 14, 2018, 9:49 PM

#

hmm.. shocking tbh

thin stratus Apr 14, 2018, 9:50 PM

#

The only way you could do the instance thing is by writing/using another service that dynamically creates servers

#

e.g. your instances

sharp spire Apr 14, 2018, 9:50 PM

#

is there a way of teleporting to custom built instance coordinates and spawning level segments client sided?

thin stratus Apr 14, 2018, 9:50 PM

#

But yeah that's a bigger story

glacial pollen Apr 14, 2018, 9:50 PM

#

@high nebula I feel for you. I even tried the Event Posses, and it still adds it to the wrong viewport

thin stratus Apr 14, 2018, 9:50 PM

#

Well you can teleport someone to 200,200,200

#

But if a second person goes there they will see each other

#

It needs to be the same map

sharp spire Apr 14, 2018, 9:51 PM

#

for instance i use to code Runescape private servers, and they would use the playerID*#### as coordinates

thin stratus Apr 14, 2018, 9:51 PM

#

You can't* compare two game engines like that

#

Thing is, UE4 allows one world and one map per server

sharp spire Apr 14, 2018, 9:52 PM

#

can a player exist in an instanced version of the same map?

thin stratus Apr 14, 2018, 9:52 PM

#

There is no "instance"

loud mountain Apr 14, 2018, 9:52 PM

#

you could (in theory) load your instance as a streaming level to some ridiculous position and have it spawned multiple times for each "instance group" AFAIK

thin stratus Apr 14, 2018, 9:53 PM

#

That's more hacky than anything else

loud mountain Apr 14, 2018, 9:53 PM

#

yeah

thin stratus Apr 14, 2018, 9:54 PM

#

The only two proper ways to add instances are:

Have a Backend that handles your player data and move players between dedicated servers that are dynamically created etc.
or
Use a different server system than UE4

sharp spire Apr 14, 2018, 9:54 PM

#

server subsystems dont count i assume?

#

lol

thin stratus Apr 14, 2018, 9:54 PM

#

No

#

With different server system I mean things like SmartFox

#

Or what ever they are all called

#

Raknet?

#

idk

night jay Apr 14, 2018, 9:55 PM

#

Question, any reason why dedicated servers aren't executing console commands at all?

high nebula Apr 14, 2018, 9:57 PM

#

Hm. Ok I switched the "Add to viewport" command to my pawn, but now its only showing up on my main window, nothing on the second.

sharp spire Apr 14, 2018, 9:57 PM

#

what are you using as the target @high nebula

high nebula Apr 14, 2018, 9:58 PM

#

the reference to my HUD widget

#

I've always created the widget on my player controller and added to viewport there, in begin play.

sharp spire Apr 14, 2018, 9:58 PM

#

https://gyazo.com/d06a09c15c0570d7eb2da0153f354963

Gyazo

#

this is what i did ignore the resize

#

and it works MP

high nebula Apr 14, 2018, 9:59 PM

#

calling that on pawn?

sharp spire Apr 14, 2018, 9:59 PM

#

but i am VERY new to MP lol

#

thats in my inventoryBP

loud mountain Apr 14, 2018, 9:59 PM

#

if you do this in your player controller check if it is a local controller

#

on listen server it tries to execute this too but widgets dont exist on servers

sharp spire Apr 14, 2018, 10:00 PM

#

maybe thats your issue @high nebula

loud mountain Apr 14, 2018, 10:00 PM

#

shouldn't fix your problem but I thought I throw this in here

high nebula Apr 14, 2018, 10:01 PM

#

I get a HUD on my main window, and a message from server from a print node on the cast failed for getting my controlled pawn

loud mountain Apr 14, 2018, 10:01 PM

#

do you have a screenshot of said beginplay function?

high nebula Apr 14, 2018, 10:02 PM

#

yup, 1 sec

#

📎 MPTest1.jpg

loud mountain Apr 14, 2018, 10:07 PM

#

try instead of get player controller (0)

#

get owning controller

#

its named something like that

#

sorry

#

get owning player controller

sharp spire Apr 14, 2018, 10:08 PM

#

thats what i was suggesting

glacial pollen Apr 14, 2018, 10:08 PM

#

📎 unknown.png

high nebula Apr 14, 2018, 10:10 PM

#

I'm not finding a get owning player controller for anything but the hud

#

and camera manager

loud mountain Apr 14, 2018, 10:10 PM

#

its get controller

#

my bad

sharp spire Apr 14, 2018, 10:11 PM

#

get controller cast to player controller

high nebula Apr 14, 2018, 10:13 PM

#

ok, Hud now working on main screen.

#

just noticed the error " Only Local Player Controllers can be assigned to widgets. TwinController_C_1 is not a Local Player Controller."

sharp spire Apr 14, 2018, 10:13 PM

#

😃

loud mountain Apr 14, 2018, 10:14 PM

#

https://img.gameplayuniver.se/i/5ad27d2a24c63.png 😛

#

this helps

high nebula Apr 14, 2018, 10:14 PM

#

no HUD on second screen, and all the related errors of not having a HUD widget reference in the output

loud mountain Apr 14, 2018, 10:14 PM

#

that error is in your character, right?

high nebula Apr 14, 2018, 10:15 PM

#

doesnt say in the message log

#

creating the widget on the pawn now, not in controller

sharp spire Apr 14, 2018, 10:17 PM

#

the controller cant find its controller...

#

it is the controller...

#

so you could have spawned your widget without a target

#

i think

#

ignore me nvm

high nebula Apr 14, 2018, 10:24 PM

#

ok, I'm getting a print from three controllers. Client1, local true. Server, local false, server local true

random verge Apr 14, 2018, 10:25 PM

#

just on that stuff above: You wouldn't want to be dynamically creating and tearing down instances. The way that gets handled in real world is the instance is just another world whose state gets reset at the beginning of an instance

winged badger Apr 14, 2018, 10:25 PM

#

@high nebula server has all the controllers

#

one of its own, one for 1 client

thin stratus Apr 14, 2018, 10:26 PM

#

@random verge Well, as said, one world per Server. So you kinda have to create and destroy them

random verge Apr 14, 2018, 10:26 PM

#

so in UE4, sure you could do it but it does mean having a separate server instance for each world. When they call them instances in games like WoW, the instance is the server. The world just gets state reset at start or end

#

yeah

sharp spire Apr 14, 2018, 10:27 PM

#

@random verge so i think i have an idea

thin stratus Apr 14, 2018, 10:27 PM

#

For something like this you just shouldn't use UE4s backend

sharp spire Apr 14, 2018, 10:27 PM

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could you switch from playing on a dedicated server, to being a listen server for another map?

thin stratus Apr 14, 2018, 10:27 PM

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Yes, you could make a client a host , but that allows cheating

random verge Apr 14, 2018, 10:27 PM

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and you have to consider if its feasible because holy shit servers are expensive. If you manage your own servers you can have several "server" instances on a single physical machine but you need to know how to manage your own VMs etc

sharp spire Apr 14, 2018, 10:27 PM

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right..

thin stratus Apr 14, 2018, 10:28 PM

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Buddy, just try to build your game around the idea of not having instances

sharp spire Apr 14, 2018, 10:28 PM

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lol

thin stratus Apr 14, 2018, 10:28 PM

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Or think about using a different backend

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Hacking your way through UE4 with that won't work

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And hosting DedicatedServers per instance etc is freaking expensive

random verge Apr 14, 2018, 10:28 PM

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for sure

thin stratus Apr 14, 2018, 10:28 PM

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Have clients who do that for simple matchmaking

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It's fast in the thousands for a few servers

sharp spire Apr 14, 2018, 10:29 PM

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so how does listenservers prevent cheating, they cant? just curious

random verge Apr 14, 2018, 10:29 PM

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wait till they start putting in dynamic proxy nodes lol #pricetag

thin stratus Apr 14, 2018, 10:30 PM

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You can't really

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Cause Server == Authority

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Server can move everything

winter plover Apr 14, 2018, 10:31 PM

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it all comes down to how well you check your RPCs

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both listen and dedicated servers check those

thin stratus Apr 14, 2018, 10:31 PM

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ListenServers don't use RPCs

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He can just teleport if it comes to that

winter plover Apr 14, 2018, 10:31 PM

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oh well yea

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if the server cheats

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theres nothign you can really do

thin stratus Apr 14, 2018, 10:31 PM

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Only thing yo ucan do is moving all data away from the ListenServer

random verge Apr 14, 2018, 10:32 PM

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if the listen server cheats I kind of look at that as: if it matters, you shouldnt have clients hosting

thin stratus Apr 14, 2018, 10:32 PM

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But then we are at hacky solutions again and you could just use a diff server backend

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Anyway, 00:32. Good night peeps!

sharp spire Apr 14, 2018, 10:32 PM

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you have mentioned server backend a few times, what exactly does this mean?

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mer

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goodnight cedric thank you as always 😃

random verge Apr 14, 2018, 10:33 PM

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the actual "master"

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like, the authoritative sim

sharp spire Apr 14, 2018, 10:34 PM

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Yea seriously lol

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is ue4 the only engine that uses node based scripting?

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as a complete game engine

high nebula Apr 14, 2018, 10:35 PM

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Ok. On my controller, I check if local controller. If true, create the widget and store in variable. On pawn, onPossess, get the hud reference. Never returns valid

random verge Apr 14, 2018, 10:36 PM

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@sharp spire Blueprints is just an option, not a requirement. Well... not a complete requirement lol it is required to an extent

sharp spire Apr 14, 2018, 10:37 PM

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i know its just an option,. but its so much easier to manage than actual languages

random verge Apr 14, 2018, 10:37 PM

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Its really just a scripting interface with a pretty visual display

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mmm, depends on your background. As a programmer, BP messes with my head.

sharp spire Apr 14, 2018, 10:37 PM

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im used to javascript so this feels nice

winter plover Apr 14, 2018, 10:38 PM

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yea I do prefer C++ for actually getting stuff done

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but its cool for hacking up quick stuff I guess

sharp spire Apr 14, 2018, 10:38 PM

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id be lost creating a game in c++

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idk how to even make an arrayt

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array*

winter plover Apr 14, 2018, 10:39 PM

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its not that hard once you wrap your head around it

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especially in ue4

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where all the icky stuff is abstracted away

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imo just dive into it and give it a shot, could end up being the better choice in the long run

sharp spire Apr 14, 2018, 10:40 PM

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but my biggest concern is unreal engines way of MP now

random verge Apr 14, 2018, 10:40 PM

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I know its off topic for this channel so I won't dwell on it but the best way I can describe it is: Blueprints and C++ can and should compliment each other well, where c++ is used to define most of your logic, and blueprints is used to contain asset data (meshes, anims, etc)

sharp spire Apr 14, 2018, 10:40 PM

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i didnt realize it was built for lobby based games

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i really wanted to make a mobile mmorpg lol

winter plover Apr 14, 2018, 10:41 PM

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yea I use BPs for anims and widgets too

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no point in doing those in pure c++

random verge Apr 14, 2018, 10:42 PM

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well, think outside of the box. A lobby doesn't have to be a dumbed down menu screen with buttons. A lobby can be whatever you choose to show the player. Maybe they spawn up a small local map where they can chill and mess around and stuff while a match is being formed in the background

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lots of fun ideas you can go with

winter plover Apr 14, 2018, 10:43 PM

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It can be a serverbrowser based thing too

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depends on the type of game I suppose

random verge Apr 14, 2018, 10:43 PM

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Something I've noticed about some of the greatest games out there: If you do things right visually, a player won't even notice 80% of what is even going on in the screen

sharp spire Apr 14, 2018, 10:43 PM

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i want to make a game like Runescape, WoW, Etc

winter plover Apr 14, 2018, 10:43 PM

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whether or not you want a "jump in and out whenever you want" kinda thing

random verge Apr 14, 2018, 10:43 PM

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World of Warcraft: ever see the character actually climb on to their mount? or off?

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Or did you just see that puff of magic dust and BAM you're on a mount

sharp spire Apr 14, 2018, 10:44 PM

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yea there is definitely a lot of trickery

random verge Apr 14, 2018, 10:44 PM

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Use things to distract the player 😃 A lobby can be the same smoke and mirrors

winter plover Apr 14, 2018, 10:44 PM

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netcode is like 90% bullshit art

random verge Apr 14, 2018, 10:44 PM

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heh

winter plover Apr 14, 2018, 10:44 PM

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all about "how do I hide latency"

random verge Apr 14, 2018, 10:45 PM

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yessir

winter plover Apr 14, 2018, 10:45 PM

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because

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you aint gettin rid of it

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as much as you want to

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and over time theres prolly been like a million ways to netcode firearms

sharp spire Apr 14, 2018, 10:45 PM

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Can ue4 handle more than 64 players?

winter plover Apr 14, 2018, 10:46 PM

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if you optimize it right

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squad has up to 80 right now

fossil spoke Apr 14, 2018, 10:46 PM

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Both PUBG and Fortnite support 100 players

random verge Apr 14, 2018, 10:47 PM

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I think I see where you're going though Pierce, you won't be hosting 3000 players on a single UE4 server instance if thats what you thinking 😛

sharp spire Apr 14, 2018, 10:47 PM

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or even 1,000...

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ugh

winter plover Apr 14, 2018, 10:47 PM

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honestly I would start way smaller if I was you

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running an mmorpg can be a PITA

sharp spire Apr 14, 2018, 10:48 PM

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i used to run one

winter plover Apr 14, 2018, 10:48 PM

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just in infrastructure alone

sharp spire Apr 14, 2018, 10:48 PM

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written in java

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but obviously it had copyright issues as jagex owns runescape

random verge Apr 14, 2018, 10:48 PM

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you spelled creating wrong. All that damn art content omg

winter plover Apr 14, 2018, 10:48 PM

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well ontop of that

fossil spoke Apr 14, 2018, 10:49 PM

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Just because you write an MMO in Java doesnt mean its in conflict with Runescape lol

sharp spire Apr 14, 2018, 10:49 PM

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that wasnt the case Devils lol, theres a whole community of players who use their assets to recreate their own versions

random verge Apr 14, 2018, 10:50 PM

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@fossil spoke Is there a hardcoded max limit for UE4? I heard before 256 was hard limit but I always figured it was if your server can take the punishment, UE4 can dish it out

fossil spoke Apr 14, 2018, 10:50 PM

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Theres no hard limit im aware of

winter plover Apr 14, 2018, 10:50 PM

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honestly that would be rather surprising

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UE4 strikes me as a "do w/e you think you can make it do" kinda engine

sharp spire Apr 14, 2018, 10:51 PM

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So my final impression is ue4 cant be used for an mmorpg with its backend server system. basic SOL?

fossil spoke Apr 14, 2018, 10:51 PM

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UE4 is open source and written in C++, you can make it do anything with enough time and knowledge

winter plover Apr 14, 2018, 10:51 PM

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yea

high nebula Apr 14, 2018, 10:51 PM

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I've got my HUD working on the main window, but Client1 cant seem to get the HUD reference, but it does have its own widget

fossil spoke Apr 14, 2018, 10:51 PM

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@sharp spire Its not designed for that no, but again like i said, you CAN do it.

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UE4 was designed for fast paced FPS games

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Anything that doesnt support that directly is due to popular demand

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At least so far as before Fortnite

winter plover Apr 14, 2018, 10:52 PM

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well I'd word it more like games that follow a round structure

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as in, you play it over and over

random verge Apr 14, 2018, 10:52 PM

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when you see massive mmo games like WoW, theres liek 30 servers just to make a single world function. They've got the "world" broken up into several actual worlds, physics running on their own VMs, like TONS and tons of stuff to be able to handle all those players.

winter plover Apr 14, 2018, 10:52 PM

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rather than one continuous simulation

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for multiplayer that is

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how good is UE4s GC actually?

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Could it even run continuously for days and reliably?

random verge Apr 14, 2018, 10:53 PM

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pretty darn good

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I can only speculate but I would assume it could for sure

fossil spoke Apr 14, 2018, 10:54 PM

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@winter plover Ive had dedi servers up for more than 4000 minutes

winter plover Apr 14, 2018, 10:54 PM

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as in the same level instance?

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or just the server running for that long

fossil spoke Apr 14, 2018, 10:54 PM

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Yeah same level

winter plover Apr 14, 2018, 10:54 PM

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mhmm

fossil spoke Apr 14, 2018, 10:55 PM

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They werent meant to be up that long, just doing stress tests

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Max play time was meant to be 1 hour

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With no level changes

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For an MOBA

sharp spire Apr 14, 2018, 10:55 PM

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So based on assumption, UE4 is the only game engine with Node based scripting as an option? My best bet is to relearn the ways of coding huh?

winter plover Apr 14, 2018, 10:56 PM

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honestly if you wanna do an mmo

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theres no way around it

fossil spoke Apr 14, 2018, 10:56 PM

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Node based scripting is no just for UE4

sharp spire Apr 14, 2018, 10:56 PM

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i know world machine and other programs use nodes

winter plover Apr 14, 2018, 10:56 PM

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like coding is the bread and butter of anything software

sharp spire Apr 14, 2018, 10:56 PM

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but i dont know of any entire game engines

winter plover Apr 14, 2018, 10:56 PM

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if you wanna actually get stuff done, you better make friends with it

sharp spire Apr 14, 2018, 10:56 PM

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meh

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i actually used to love coding

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real coding lol

fossil spoke Apr 14, 2018, 10:57 PM

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No i meant UE4 isnt the only engine to use node scripting

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CE uses it, Snowdrop uses it

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Pretty much any AAA engine uses it