#multiplayer | Unreal Source | Page 587

vital heron Nov 9, 2020, 11:16 PM

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Im finally at the stage where I can focus more on blueprint, THANK THE LORD cpp development was hell
@unkempt tiger you fought well solider lmao

chrome bay Nov 9, 2020, 11:16 PM

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oh yeah totally

vital heron Nov 9, 2020, 11:18 PM

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now I gotta go think about another idea for a game lol cuz the one I had in mind focused a lot on multiplayer

autumn vine Nov 9, 2020, 11:19 PM

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Gotta start with baby steps man.

unkempt tiger Nov 9, 2020, 11:19 PM

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you dont have to pivot your entire game development future

vital heron Nov 9, 2020, 11:19 PM

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ikr

unkempt tiger Nov 9, 2020, 11:19 PM

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you can do a small project, 2 months, learn the basics and come back to your original idea!

vital heron Nov 9, 2020, 11:20 PM

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I just want to learn how to replicate movement well which will take me a bit of time so it will be a while before I come back to my original idea lol

unkempt tiger Nov 9, 2020, 11:21 PM

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if that's what you just want to learn (rather than develop a game in the near future), then read up on solutions and tackle it head first

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(you can do it!)

vital heron Nov 9, 2020, 11:22 PM

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thank you!

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but one thing is for certain

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im not getting rid of my player model

📎 Screenshot_103.png

chrome bay Nov 9, 2020, 11:22 PM

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lol. ship it

vital heron Nov 9, 2020, 11:22 PM

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lmaooooo

autumn vine Nov 9, 2020, 11:24 PM

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@chrome bay if I limit the fast array to something like 100, everything works great.

meager spade Nov 9, 2020, 11:25 PM

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are you updating all the time?

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cause my fast array had 3k items in it, and not one issue

autumn vine Nov 9, 2020, 11:25 PM

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Nope.. current test case is just adding the items to it

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then not touching them

meager spade Nov 9, 2020, 11:25 PM

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something you have done must be screwing it up

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without seeing your code or w/e we can only guess

autumn vine Nov 9, 2020, 11:26 PM

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what part are you wanting to see?

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I'm not permitted to just post all of it, I can show snippets as necessary

meager spade Nov 9, 2020, 11:27 PM

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not sure tbh, probably your struct, how you are adding items, and your actors rep settings

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or at least some bits of it

autumn vine Nov 9, 2020, 11:27 PM

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struct FItemEntry : public FFastArraySerializerItem
{
    GENERATED_BODY()
public:
    UPROPERTY(Transient)
    FString ItemName = TEXT("");

    /** 
    * Optional functions you can implement for client side notification of changes to items; 
    * Parameter type can match the type passed as the 2nd template parameter in associated call to FastArrayDeltaSerialize
    * 
    * NOTE: It is not safe to modify the contents of the array serializer within these functions, nor to rely on the contents of the array 
    * being entirely up-to-date as these functions are called on items individually as they are updated, and so may be called in the middle of a mass update.
    */
    void PreReplicatedRemove(const struct FVEItemArray& InArraySerializer);
    void PostReplicatedAdd(const struct FVEItemArray& InArraySerializer);
    void PostReplicatedChange(const struct FVEItemArray& InArraySerializer);

    // Optional: debug string used with LogNetFastTArray logging
    FString GetDebugString();
};```

meager spade Nov 9, 2020, 11:28 PM

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so your just sending a FString out?

autumn vine Nov 9, 2020, 11:28 PM

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class VIRTUALENVIRONMENT_API AMyGameState : public AGameState```

meager spade Nov 9, 2020, 11:28 PM

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show me your Serializer

autumn vine Nov 9, 2020, 11:28 PM

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I've simplified it to that base case ya

meager spade Nov 9, 2020, 11:28 PM

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how many props do you have in your full FItemEntry?

autumn vine Nov 9, 2020, 11:28 PM

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struct FItemArray: public FFastArraySerializer
{
    GENERATED_BODY()
public:
    UPROPERTY()
    TArray<FItemEntry> Items;    

    bool NetDeltaSerialize(FNetDeltaSerializeInfo & DeltaParms)
    {
        return FFastArraySerializer::FastArrayDeltaSerialize<FItemEntry, FItemArray>( Items, DeltaParms, *this );
    }
};```

meager spade Nov 9, 2020, 11:29 PM

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and you hve the other part to go with it right?

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struct TStructOpsTypeTraits<FBiomassDamageFastArraySerializer> : public TStructOpsTypeTraitsBase2<FBiomassDamageFastArraySerializer>
{
    enum
    {
        WithNetDeltaSerializer = true,
    };
};```

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like this?

autumn vine Nov 9, 2020, 11:29 PM

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this part?

struct TStructOpsTypeTraits< FItemArray > : public TStructOpsTypeTraitsBase2< FItemArray >
{
    enum 
    {
        WithNetDeltaSerializer = true,
   };
};```

meager spade Nov 9, 2020, 11:30 PM

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just making sure, cause that is important

autumn vine Nov 9, 2020, 11:30 PM

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Yup

meager spade Nov 9, 2020, 11:30 PM

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then i have no idea, how quickly are you adding items?

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are you calling MarkDirty after each add or after you added all ?

autumn vine Nov 9, 2020, 11:31 PM

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MyGameState:

{
    Super::GetLifetimeReplicatedProps(OutLifetimeProps);
    DOREPLIFETIME(AVEGameState, RegisteredItemsArr);
    DOREPLIFETIME(AVEGameState, Test); // replicated int32 incremented on server frame
}```

meager spade Nov 9, 2020, 11:32 PM

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cause you need to call MarkItemDirty after every item

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when you are adding/changing

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and MarkArrayDirty when removing iirc

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else your ID counter ends up messed up

autumn vine Nov 9, 2020, 11:33 PM

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creation: partially cut down

{
    UItem* ItemObj = nullptr;
    UItem** ItemObjPtr = RegisteredItems.Find(Item);
    AMyGameMode* GameMode = Cast<AMyGameMode>(this->AuthorityGameMode);
    if (!ItemObjPtr && GameMode)
    {
        ItemObj = NewObject<UItem>(this);
        RegisteredItemsArr.Add(ItemObj);
        FItemEntry ItemStruct;
        ItemStruct.ItemName = Item;
        RegisteredItemsArr.MarkItemDirty(RegisteredItemsArr.Items.Add_GetRef(ItemStruct));
        ItemObj->SetItemName(Item);
    }
    else if (ItemObjPtr)
    {
        ItemObj = *ItemObjPtr;
    }
    return ItemObj;
} ```

ignore all of ItemObj stuff

meager spade Nov 9, 2020, 11:34 PM

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i had issues doing that

autumn vine Nov 9, 2020, 11:34 PM

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Doing which part?

meager spade Nov 9, 2020, 11:34 PM

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 RegisteredItemsArr.MarkItemDirty(MyItem);```

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i honestly has weird bugs

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when doing what you did above

autumn vine Nov 9, 2020, 11:35 PM

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Lovely, so what did you change to? Also, to note, is that I was having this same lockup problem with a regular tarray of this ustruct before moving over to fast array

meager spade Nov 9, 2020, 11:35 PM

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err i can't show you my code, my pc died, (motherboard or cpu gave up)

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and my works project is all NDA 😄

autumn vine Nov 9, 2020, 11:37 PM

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Guess I'll try

        RegisteredItemsArr.MarkItemDirty(RegisteredItemsArr.Items.Last());``` 😛

meager spade Nov 9, 2020, 11:37 PM

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no

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just do FMyStruct& MyStruct = RegisteredItemsArr.Items.Emplace_GetRef(); MyStruct.Name = "Blah"; RegisteredItemsArr.MarkItemDirty(MyStruct);

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also nice and clean

autumn vine Nov 9, 2020, 11:40 PM

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Launching now. I always forget which array libraries have which convenience function lol I hop languages and over to stl too much

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Interesting. Stalled for a while then client started getting regular updates.

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I think I've got something totally unrelated stalling network traffic for a good while at startup 😐 and all of this I've been screwing with is just a side effect.

meager spade Nov 9, 2020, 11:46 PM

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yeah

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get the profiler out

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and get insights running

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find out what is happening

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insights in 4.25+ will show you all network traffic

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and sizes

unkempt tiger Nov 9, 2020, 11:47 PM

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thats something I gotta do myself

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still havent managed to open the profiler and get it working

autumn vine Nov 9, 2020, 11:48 PM

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Thanks for the help man. I've used the profiler plenty.

delicate zinc Nov 9, 2020, 11:49 PM

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Hi, I was wondering if anyone knew how to sort a scoreboard like in most shooter games with kills and deaths. I have the scoreboard made I just need to know how to sort an array of PlayerStates by the kills variable in it. I'm using bps

meager spade Nov 9, 2020, 11:49 PM

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Insights is better than network profiler

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you should try it

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@delicate zinc welp.

autumn vine Nov 9, 2020, 11:49 PM

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@meager spade reading the docs on it right now!

meager spade Nov 9, 2020, 11:50 PM

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you would need to do a couple of loops

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in C++, i can do it one simple quick line

delicate zinc Nov 9, 2020, 11:50 PM

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If you explained how it works I might be able to figure it out in bps.

meager spade Nov 9, 2020, 11:53 PM

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i honestly can't think of an easy way to do it in bp, but in C++ i can do something like this TArray<FMyScores> SortedScores = GameState->GetScores(); SortedScores.Sort([](const FMyScore& A, const FMyScore& B) { return A.Kills > B.Kills && A.Deaths < B.Deaths; });

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something like that

delicate zinc Nov 9, 2020, 11:53 PM

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wow that looks a lot cleaner than what I'm about to have to do in bps

meager spade Nov 9, 2020, 11:54 PM

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yeah in BP, i would have no idea how to do that

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for things like that, i normally make some C++ function

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cause i can do it so much easier

winged badger Nov 9, 2020, 11:55 PM

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most loops are highly inefficient in BP

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not just that they take several monitors worth of space

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they aren't extremely performant, either

meager spade Nov 9, 2020, 11:56 PM

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basically, i think you would need to loop till you find the highest kills shove it in an array, then start your loop again, and make sure they are not in your array, then find the next one, add it to the array, then loop again, that seems really inefficient in BP

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does BP not have a sort node?

winged badger Nov 9, 2020, 11:57 PM

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does BP have Swap function?

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for array

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Sort requires an operator< to be implemented on array element

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which you can't do in BP

meager spade Nov 9, 2020, 11:57 PM

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it has a swap iirc

winged badger Nov 9, 2020, 11:58 PM

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but you could do for (0 to num -1) for (0 to num - 1 - outerloopiterations) if A < B, Swap(A, B)

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in BP

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basically implementing the simple sort manually

meager spade Nov 9, 2020, 11:58 PM

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yeah

winged badger Nov 9, 2020, 11:59 PM

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(where A is Array[OuterLoopIndex] and B is Array[InnerLoopIndex])

meager spade Nov 10, 2020, 12:06 AM

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@delicate zinc https://gyazo.com/b3283e7ee99cd042d19abfc05a8008ae

Gyazo

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turned these https://gyazo.com/79be7732660d4fab89ffa8779d52cad5 into https://gyazo.com/b58499406f0888c084fd250a92cc7905

Gyazo

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if that helps

delicate zinc Nov 10, 2020, 12:08 AM

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@meager spade Thank you so much. Sorry I went to go do something.

gusty lily Nov 10, 2020, 1:48 AM

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I have a multiplayer game over a year into early access and i've always been bugged by getting information out of 1. saved files and 2. steam profiles and making that accessible to all clients.

I'm trying to pull these into the player state on begin play,, with RPCs. I think these variables shoudl then be accessible ad hoc to all clients, but it doesnt seem to be that way.

Is there a more sensible/reliable way to do this?

slender mortar Nov 10, 2020, 2:44 AM

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Hello everyone, I read that SetControlRotation should be used to replicate character rotation smoothly (as it is handled with prediction and such)

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However, I see that the springarm and camera use that setting mainly for rotating it

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Which basically makes calling SetControlRotation get the camera always stuck behind the character (especially when moving)

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The reason why I'm not using SetActorRotation is because I read that it'll result in jittery rotation on every client (owner and proxies)

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Any kind help would be highly appreciated

ornate copper Nov 10, 2020, 4:08 AM

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Hello everyone, I am trying to make a small project that is a Top Down Multiplayer game and I used https://forums.unrealengine.com/community/community-content-tools-and-tutorials/103887-template-multiplayer-topdown-template-c?131269-TEMPLATE-Multiplayer-TopDown-Template-C= as a template and fixed it for 4.25(https://github.com/shelltitan/UE4TopDownMultiplayerTemplate). I tried to set the lag to 75 using the console and the camera starts to jitter when you stand, I think this probably because the interpolation but I would like to know if anyone has a solution.

Unreal Engine Forums

This is the place to show, share, and link to your stuff!

summer tide Nov 10, 2020, 4:37 AM

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I'm trying to replicate sitting on chair. So it's easy but having trouble replicating the character's rotation based on which way the chair is facing.

misty plover Nov 10, 2020, 4:45 AM

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Hello, im new to networking. How would i make it so that an enemy can look at both the players instead of just the first player?

winged badger Nov 10, 2020, 4:57 AM

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@summer tide client is perfectly aware which direction the chair is facing

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meaning it can run its own animation and calculate its own rotations

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nothing needs to be replicated except which chair you're sitting on

tranquil yoke Nov 10, 2020, 5:22 AM

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Hey guys, having one issue this happens always for one Hand, I am doing a VR multiplayer, and one of the hand never gets updated for other clients.
Not able to find why, this happens If i update the hand position using rep notfies + multicast, but if i do reliable then it does work.

Is something related to network congestion ?

winged badger Nov 10, 2020, 5:24 AM

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i think its safe to say no

tranquil yoke Nov 10, 2020, 5:24 AM

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It does not happens locally.

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but always on Android

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Does Engine.ini Net Driver settings goes to Android, or is there anything specific we have to do, Like increase limit or something.

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i am totally clueless.

summer tide Nov 10, 2020, 5:29 AM

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@winged badger In blueprint I get the transform from chair then face the char that way. If the chair is facing away from me VS facing toward me, diff situation.

winged badger Nov 10, 2020, 5:30 AM

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what does that have to do with replication?

summer tide Nov 10, 2020, 5:32 AM

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The rotation of the char appears wrong on server for client

winged badger Nov 10, 2020, 5:33 AM

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all client needs to know is that you're (about to) sit on that chair

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it can do the rest itself

summer tide Nov 10, 2020, 5:34 AM

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I still have to rotate the char manually.

tranquil yoke Nov 10, 2020, 5:36 AM

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@winged badger hey is there anything i can do debug this i mean start from somewhere

winged badger Nov 10, 2020, 6:12 AM

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wihtout knowing your entire structure, i have no idea

keen thorn Nov 10, 2020, 8:55 AM

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Hi, does anyone have experience with using OnlineBeacons, and specifically OnlineBeacon servers (separate from game server)? What I'm trying to do is have a separate game server of online beacons that will be used to issue valid "ticket/tokens" to clients to use for security purposes. I.e if a client want to initiate match making they will need to supply this ticket reserved from the server.

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Or if there are other standard ways to do this ticket thing. Cus right now my matchmaking server is open for any 3rd party to just request (since its just a simple Nodejs server that takes in REST requests)

velvet brook Nov 10, 2020, 9:07 AM

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What do you guys recommend for hosting online servers? Linode? AWS? Google?

silent valley Nov 10, 2020, 9:11 AM

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@velvet brook I recently worked through this blog post which met my requirements. Deployment of servers to AWS. Really great post.
https://medium.com/swlh/building-and-hosting-an-unreal-engine-dedicated-server-with-aws-and-docker-75317780c567

velvet brook Nov 10, 2020, 9:12 AM

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@silent valley thanks! i'll take a look

plush wave Nov 10, 2020, 11:30 AM

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Are AInfo classes always relevant?

keen thorn Nov 10, 2020, 11:33 AM

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@velvet brook I recently worked through this blog post which met my requirements. Deployment of servers to AWS. Really great post.
https://medium.com/swlh/building-and-hosting-an-unreal-engine-dedicated-server-with-aws-and-docker-75317780c567
@silent valley for AWS i recommend looking into gamelift, as its very cheap and support scaling very well

Medium

Building and Hosting an Unreal Engine Dedicated Server with AWS and...

Today I am going to walk you through the process of building and deploying your very own Unreal Engine 4 dedicated server running on…

silent valley Nov 10, 2020, 11:35 AM

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Yeah that's definitely the right thing for session based, but our game is persistent world with fixed dedicated servers per territory.

velvet brook Nov 10, 2020, 11:35 AM

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Mine is session based so I’ll check it out

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You workin on a MMO?

silent valley Nov 10, 2020, 11:36 AM

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more like Rust if you know that game?

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so one world per server, aiming for ~100 concurrent users

velvet brook Nov 10, 2020, 11:43 AM

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Ooh awesome!

fiery badge Nov 10, 2020, 12:40 PM

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Hey Guys!
Can Anyone HELP ME Out.
I want to learn multiplayer but it's just too complicated.
Everything going over the top.
I UNDERSTAND The Theory but can't make it HAPPEND

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Can Anyone teach me OR Just Puch me so that i can start Somthing.......

silent valley Nov 10, 2020, 12:42 PM

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Sorry there's no easy way, start by making something small, follow through the basic tutorials on the unreal site

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gradually your understanding will increase

fiery badge Nov 10, 2020, 12:43 PM

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I tried

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i am trying to learn for like week

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but nothing

silent valley Nov 10, 2020, 12:44 PM

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then make something single player first. multiplayer is WAY more complex than single player.

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dont bite off more than you can chew or you'll get frustrated

fiery badge Nov 10, 2020, 12:45 PM

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i had create simple single player game
i just Can't make it Multiplayer

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For Example

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i created a box game

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Short and simple

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when you start game

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you play as box character

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and can shoot things

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everything work on single player

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but on multiplayer

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it's just spawning two or three player

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and that its

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it's working on server side

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but not on client side

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some thing like that

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i have experience in creating single player games.

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but multiplayer.............

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i had seen tutorials and read some documents

rich ridge Nov 10, 2020, 12:50 PM

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Follow any good tutorial about RPC, some important multiplayer classes like GameMode, PlayerController and PlayerState, etc. And then follow one multiplayer tutorial

fiery badge Nov 10, 2020, 12:50 PM

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but nothing start to click

rich ridge Nov 10, 2020, 12:50 PM

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YouTube has abundance of such tutorials

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Even epic games also have one multiplayer tutorial entirely in blueprints

fiery badge Nov 10, 2020, 12:52 PM

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in my experience ( till now ) tutorials on YouTube have two types

rich ridge Nov 10, 2020, 12:53 PM

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https://www.youtube.com/playlist?list=PLZlv_N0_O1gYqSlbGQVKsRg6fpxWndZqZ

YouTube

Blueprint Multiplayer | v4.11 | Unreal Engine

Video Tutorial Series In this video series, Wes Bunn from Epic Games walks you through creating a networked game with Steam integration entirely through Blue...

fiery badge Nov 10, 2020, 12:53 PM

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there start with theory and end with something confusing

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thart start with somethng build on and just explain what there did

rich ridge Nov 10, 2020, 12:54 PM

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Follow above link

fiery badge Nov 10, 2020, 12:54 PM

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i already seen it

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it's type 2

rich ridge Nov 10, 2020, 12:54 PM

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They build it live during the stream

fiery badge Nov 10, 2020, 12:55 PM

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there don't explain how things works. there just explain how there did it

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like hey we did this and this

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and you can copy past it

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ok

rich ridge Nov 10, 2020, 12:58 PM

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That tutorial is for starters or designers...that's why theyr doing in bp..and that's why they aren't explaining the science behind the logic because beginners or designers can't understand that.
If they can understand that than they can code in c++ and don't need anyone's help.

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Just learn the building block and when you think you have gained some knowledge then you question

fiery badge Nov 10, 2020, 1:00 PM

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I know..... I know......

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i just not in my best mood

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like usually don't compline about thinks

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but it's just more than one week

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but when i open unreal engine for multiplayr

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i don't know i am doing

rich ridge Nov 10, 2020, 1:02 PM

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Are you a student or professional engineer?

fiery badge Nov 10, 2020, 1:02 PM

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i am a student

rich ridge Nov 10, 2020, 1:02 PM

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Yeah I can understand ..

fiery badge Nov 10, 2020, 1:02 PM

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i just start learning unreal engine like one year

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less than a year

earnest comet Nov 10, 2020, 1:03 PM

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One thing you need to understand is that singleplayer and multiplayer are really done different than each other.

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It's definitely not a beginner friendly thing. Multiplayer that is.

ornate copper Nov 10, 2020, 1:03 PM

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you can have loads of issues that single player doesn't suffer from

earnest comet Nov 10, 2020, 1:03 PM

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I am working on Unreal non-multiplayer for like 5 years and when I look at multiplayer stuff I all make is a surprised pickachu face.

ornate copper Nov 10, 2020, 1:04 PM

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just bugs and depending on game hacking

earnest comet Nov 10, 2020, 1:04 PM

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it's definitely not rocket science but surely asks too much from you, especially at the patience department

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there are tons of stuff that could go wrong

fiery badge Nov 10, 2020, 1:05 PM

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yeah

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i was just hoping that someone will just teach me something

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like just basic

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to get stared

rich ridge Nov 10, 2020, 1:06 PM

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You are not in a position to question the science behind the logic.. just learn as it is.

earnest comet Nov 10, 2020, 1:06 PM

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as others suggested, your only bet is youtube tutorials and such

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there are really good videos out there

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also, people don't have to teach you things for free 😛

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ESPECIALLY multiplayer xP

rich ridge Nov 10, 2020, 1:07 PM

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Even though you are curious to know how stuff works behind the scenes, if someone explains you the science you won't understand.

earnest comet Nov 10, 2020, 1:07 PM

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Indeed. You really need to delve into it face front.

fiery badge Nov 10, 2020, 1:08 PM

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i know i know

mighty zinc Nov 10, 2020, 1:08 PM

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And then get ur face smashed into 2000 pieces

earnest comet Nov 10, 2020, 1:10 PM

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I don't think UE4 devs got any face left so to speak 🤔

rich ridge Nov 10, 2020, 1:10 PM

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Monkey de luffy is right.

silent valley Nov 10, 2020, 1:10 PM

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you guys clearly haven't attempted multiplayer in any other engines :)
UE4 is a DREAM compared to most others.

fiery badge Nov 10, 2020, 1:11 PM

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what i was hoping for is that someone teach me and in return i can do some programming ( IN SINGLE PLAYER ) or stuff like that in return.

mighty zinc Nov 10, 2020, 1:11 PM

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Arigato

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Unity is good

fiery badge Nov 10, 2020, 1:11 PM

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I HAVE SOME FREE TIME RIGHT NOW

mighty zinc Nov 10, 2020, 1:11 PM

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As ive heard

earnest comet Nov 10, 2020, 1:12 PM

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well... People who knows multiplayer does not really need help on singleplayer themselves. Again, you can only hire someone to teach you stuff. And be prepared to pay a lot for multiplayer.

velvet brook Nov 10, 2020, 1:12 PM

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@fiery badge here is a good video that helped me understand it a lot

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https://www.youtube.com/watch?v=UmJzuRO4Qjs&t=1330s

YouTube

Reuben Ward

Learn Unreal Engine Networking in 30 Minutes

Try my C++ Survival Game Course:
http://bit.ly/unrealsurvival

Discord:
https://discord.gg/meFRZfm

Today I do my best to teach the basics of networking to you in under 30 minutes. Enjoy!

▶ Play video

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Download the test content as well and mess around

mighty zinc Nov 10, 2020, 1:12 PM

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Uk theres a bigger mess called ue4 for mobile

velvet brook Nov 10, 2020, 1:13 PM

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That’s the only way u learn, try to make something, fail, try again

earnest comet Nov 10, 2020, 1:13 PM

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Mobile is the true Hell QQ.

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But then there is Mobile Multiplayer. Extreme Hell for the truest sinners.

silent valley Nov 10, 2020, 1:14 PM

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Unity has no multiplayer other than 3rd party libs. It's a mess. It's the reason I switched to UE4 and I'm so happy I did.

velvet brook Nov 10, 2020, 1:14 PM

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Same

mighty zinc Nov 10, 2020, 1:14 PM

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People like dani dont seem to have a problem with it

rich ridge Nov 10, 2020, 1:15 PM

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Unity is not changing with time.. they are stuck and not adding any revolutionary features for their Engine.

fiery badge Nov 10, 2020, 1:16 PM

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well... People who knows multiplayer does not really need help on singleplayer themselves. Again, you can only hire someone to teach you stuff. And be prepared to pay a lot for multiplayer.
@earnest comet Why not if you have lots of stuff than you can teach for one or two hours and i can for them for like two to four hours so it's win win for both.

earnest comet Nov 10, 2020, 1:17 PM

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Teaching someone multiplayer is not something can be compared to helping them in singleplayer in return.

ornate copper Nov 10, 2020, 1:17 PM

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Learning multiplayer is a long time

velvet brook Nov 10, 2020, 1:17 PM

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Lol

earnest comet Nov 10, 2020, 1:17 PM

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I would say... 1 day of teaching equals to 1 month of singleplayer payment in return 😛

ornate copper Nov 10, 2020, 1:17 PM

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and you need different knowledge based on what you want

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FPS

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MOBA

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RTS

fiery badge Nov 10, 2020, 1:18 PM

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I would say... 1 day of teaching equals to 1 month of singleplayer payment in return 😛
@earnest comet WHAT.....

earnest comet Nov 10, 2020, 1:18 PM

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What do you think multiplayer TEACHING is? Walk in the park? 😛

mighty zinc Nov 10, 2020, 1:18 PM

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Yes! lets scare the new devs here

ornate copper Nov 10, 2020, 1:18 PM

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it isn't a scare

silent valley Nov 10, 2020, 1:18 PM

#

😂

earnest comet Nov 10, 2020, 1:18 PM

#

It's not about scaring them.

ornate copper Nov 10, 2020, 1:18 PM

#

most of them want a MMO in a week

earnest comet Nov 10, 2020, 1:18 PM

#

Multiplayer is hard. Whoever thinks it's easy for a BEGINNER is doing it wrong in the first place.

velvet brook Nov 10, 2020, 1:18 PM

#

eXi’s document is insane as well http://cedric-neukirchen.net/Downloads/Compendium/UE4_Network_Compendium_by_Cedric_eXi_Neukirchen.pdf

earnest comet Nov 10, 2020, 1:19 PM

#

I think you guys really forgeting the times that Unreal Forums were SWARMED by people who wanted to make MMORPGs years ago.

#

We lost so many good folk trying to tell them "it doesn't work that way" 😛

mighty zinc Nov 10, 2020, 1:19 PM

#

Well the most imp skill is to be able to browse source code now

ornate copper Nov 10, 2020, 1:20 PM

#

There isn't too much source code

rich ridge Nov 10, 2020, 1:20 PM

#

@fiery badge the number of things which you can learn from self exploration is infinite, if you hire someone to teach you he will only teach things for which you are paying him.

ornate copper Nov 10, 2020, 1:20 PM

#

in UE4

#

that will help

#

with multiplayer

mighty zinc Nov 10, 2020, 1:21 PM

#

Even youtube has some hidden gems

silent valley Nov 10, 2020, 1:21 PM

#

The way I learned as a complete UE4 beginner was to follow this tutorial from start to finish. I did not understand it at all but by the time I reached the end I had something working and some concepts had started to make sense to me.
When I am learning I'm more of a do-er than a video watcher so this worked great for me.
Once you complete this you will be network programmer lvl 1. Ready to start slowly adding new features.
https://docs.unrealengine.com/en-US/Gameplay/Networking/QuickStart/index.html

Multiplayer Programming Quick Start

Create a simple multiplayer game in C++.

ornate copper Nov 10, 2020, 1:21 PM

#

depends on what you do

mighty zinc Nov 10, 2020, 1:22 PM

#

Well it doesn't help to depend on people

#

If u want to stand out

#

U have to do it differently

#

Basically if u have a problem

#

Then look into source code

#

Try a bunch of stuff

#

Ull only learn

ornate copper Nov 10, 2020, 1:23 PM

#

The thing is if you want to do third person stuff

#

you will have some source

#

but that might not work well if you want to make a game with players

fiery badge Nov 10, 2020, 1:24 PM

#

ok

#

i have question

#

if you have class for example bullet

#

you want to spawn from you character

#

how you do it

#

ok

silent valley Nov 10, 2020, 1:26 PM

#

C++ ?

fiery badge Nov 10, 2020, 1:26 PM

#

what i did

#

no blueprint

#

ok

mighty zinc Nov 10, 2020, 1:27 PM

#

Spawn actor

fiery badge Nov 10, 2020, 1:27 PM

#

i make bullet class replicated and than when character press button than spawn

#

what the bug is

rich ridge Nov 10, 2020, 1:27 PM

#

Don't forget to add projectile component

fiery badge Nov 10, 2020, 1:28 PM

#

done

silent valley Nov 10, 2020, 1:28 PM

#

Tick the Replicated box on the Bullet class.
Make sure only the server spawns an instance of Bullet and if it's replicated all clients will also spawn it.

fiery badge Nov 10, 2020, 1:28 PM

#

it's spawn in server but not in client

autumn vine Nov 10, 2020, 1:28 PM

#

I'm guessing UE4's networking does an attempt at load balancing of some sort? I replicate a large amount of data in an Actor and there is no network communication for 20 seconds and then it resumes, another somewhat big piece of data gets sent and networking blanks out for 2 seconds then resumes to normal, regular updates of the small data I send. Any ideas what is going on here? My information is from looking at networking insights.

earnest comet Nov 10, 2020, 1:29 PM

#

how large amount we are talking about?

silent valley Nov 10, 2020, 1:29 PM

#

how much data are you talking? It's easy to flood the network driver and it throttles right back in my experience.

autumn vine Nov 10, 2020, 1:29 PM

#

"large amount" of data was 178000 bits

ornate copper Nov 10, 2020, 1:30 PM

#

that is quite a lot

#

per tick

autumn vine Nov 10, 2020, 1:30 PM

#

It is a one time send

#

not per tick

silent valley Nov 10, 2020, 1:30 PM

#

how are you sending it?

earnest comet Nov 10, 2020, 1:30 PM

#

I don't think this should cause a 20 second delay though...

rich ridge Nov 10, 2020, 1:31 PM

#

This is 21Kb

autumn vine Nov 10, 2020, 1:31 PM

#

replicated fast array in gamestate.

#

seems ue4 limits data to ~1kbyte per network tick

#

I can see it takes 24 of the networking ticks to send but then there is that huge 20 seocnd gap before any data is sent

ornate copper Nov 10, 2020, 1:33 PM

#

it is serialized and stuff

#

but that wouldn't take that long

autumn vine Nov 10, 2020, 1:34 PM

#

This is all running client/server in pie locally btw on a relatively high end desktop. 8700k 64gb ram

silent valley Nov 10, 2020, 1:35 PM

#

worst case why not send it in chunks yourself via RPC

rich ridge Nov 10, 2020, 1:35 PM

#

You are doing something wrong .. in pie it should be like speed of RAM.

fiery badge Nov 10, 2020, 1:35 PM

#

ok back to WAR with MULTIPLAYER on my own.
WISH ME LUCK. (and have a nice day to all)

ornate copper Nov 10, 2020, 1:35 PM

#

64gb ram?

silent valley Nov 10, 2020, 1:35 PM

#

yeah I'm sure that somewhere in the engine it's throttling the connection

autumn vine Nov 10, 2020, 1:36 PM

#

Ya somewhere is throttling but at an extremely low amount of network traffic.

silent valley Nov 10, 2020, 1:36 PM

#

int32 UNetConnection::IsNetReady( bool Saturate )
{
    // Return whether we can send more data without saturation the connection.
    if (Saturate)
    {
        QueuedBits = -SendBuffer.GetNumBits();
    }

#

CVarDisableBandwithThrottling ?

rich ridge Nov 10, 2020, 1:37 PM

#

You entire unreal process is in RAM and your networking behaves like IPC @autumn vine

silent valley Nov 10, 2020, 1:37 PM

#

"net.DisableBandwithThrottling"

autumn vine Nov 10, 2020, 1:37 PM

#

21kB is not much for a one time send. I'll look into the throttle variables.

#

one sec.. I'll get back to you with if that helps

silent valley Nov 10, 2020, 1:39 PM

#

honestly I never really got to the bottom of my problems, the cvars didn't help. eventually I just send less data and now I have no problem.

chrome bay Nov 10, 2020, 1:39 PM

#

replication etc. is tuned more towards lots of small packets at high frequency, rather than larger packets at lower frequency

#

Sometimes you just have to break stuff up

silent valley Nov 10, 2020, 1:41 PM

#

👆 easiest solution is to do this unless you want to fight Unreal engine

earnest comet Nov 10, 2020, 1:41 PM

#

as a really newbie in networking stuff

#

I thought 21kb wasn't abig of a deal?

#

Aren't MMORPGs doing much more than this?

#

I am abit concerned about this.

chrome bay Nov 10, 2020, 1:42 PM

#

it's a massive amount for one single property

earnest comet Nov 10, 2020, 1:42 PM

#

oh

chrome bay Nov 10, 2020, 1:43 PM

#

If it's a replicated property causing the trouble it's trickier to workaround, you can't really break it into chunks

#

Unless doing so artificially with multiple properties ofc

earnest comet Nov 10, 2020, 1:44 PM

#

I see. Let's just say I want to replicate an integer value.

#

📎 Capture.PNG

#

This is what would be send in a sense, yes?

#

size-wise

chrome bay Nov 10, 2020, 1:44 PM

#

4 bytes for an int32, plus any additional header data that identifies the property etc.

earnest comet Nov 10, 2020, 1:45 PM

#

Got you. Then thats why you think 21kb is massive and I understand. 🤔

chrome bay Nov 10, 2020, 1:45 PM

#

yeah for one single property on one actor it's a lot

autumn vine Nov 10, 2020, 1:53 PM

#

I'm back so I'll try the throttling now. @chrome bay you say this is bad to do with a replicated value. My other stall is on an rpc (server to client) that sends 14kbits one time and stalls networking for 2 seconds.

chrome bay Nov 10, 2020, 1:54 PM

#

yeah I can just imagine a case where you've set the replicated value up over several seconds or something so it replicates in chunks, but then a new player joins and it has to replicate in one go anyway

#

I think there is a max size for RPC's also

autumn vine Nov 10, 2020, 1:56 PM

#

In my use case, the client is relatively dumb, so the server has to send over the initial conditions and then as the game progresses, changes to those conditions after the fact which are small and not often. Overall network usage is very low, but I need to be able to dump data to the client at the beginning

chrome bay Nov 10, 2020, 1:56 PM

#

Hmm, it might be that you need to use a TCP socket or something to send the initial data perhaps

autumn vine Nov 10, 2020, 1:57 PM

#

Isn't the whole point of replication to avoid working with a raw socket?

silent valley Nov 10, 2020, 1:58 PM

#

it's just not designed for the sizes you're talking about

chrome bay Nov 10, 2020, 1:58 PM

#

It is but replication is designed for many small packets

#

rather than one off bursts

silent valley Nov 10, 2020, 1:59 PM

#

if you need this tech for your game then you'll either need to write a wrapper that replicates an array of data in chunks, or make a wrapper for TCPSockets but that's probably gonna be more painful

autumn vine Nov 10, 2020, 2:00 PM

#

Disabled thottling and it worked beautifully

#

I'm just gonna leave throttling disabled lol. The data sent during runtime is so low I won't have to worry about any client hogging the network. The throttling algorithm just stalls everything out at startup

earnest comet Nov 10, 2020, 2:02 PM

#

lawsen can you tell us how you did it exactly? I might need to use it when the time comes ^-^

chrome bay Nov 10, 2020, 2:03 PM

#

did you bump the default throttle limits in DefaultEngine.ini btw?

autumn vine Nov 10, 2020, 2:03 PM

#

As @silent valley said. Console "net.DisableBandwidthThrottling 1"

earnest comet Nov 10, 2020, 2:04 PM

#

Thanks!

autumn vine Nov 10, 2020, 2:04 PM

#

@chrome bay I have not touched any engine network settings. Behavior I was getting was so bad I assumed I missed a line in my c++ or something wild.

chrome bay Nov 10, 2020, 2:04 PM

#

InitialConnectTimeout=120.0f
MaxNetTickRate=60
NetServerMaxTickRate=60
LanServerMaxTickRate=60
NetClientTicksPerSecond=60
bClampListenServerTickRates=true
MaxClientRate=10000
MaxInternetClientRate=10000```

These are my current settings - you can bump MaxClientRate and MaxInternetClientRate up, I think 10K are the defaults, but lots of games go up to 30-40K IIRC

#

Clamping the network rates can be nice too, as it can help prevent clients with extremely high framerates from hammering the server

#

created a lot of problems for me in empty test maps, especially where client can exceed 120-150FPS or something stupid

autumn vine Nov 10, 2020, 2:07 PM

#

Ya I've done a decent amount of ue4 networking before. Just never run into it completely starving a connection. Yesterday, the stall was so long that I assumed it was completely locked up and something in the code was silently failing.

chrome bay Nov 10, 2020, 2:08 PM

#

yeah, it just doesn't like big chunks of data

autumn vine Nov 10, 2020, 2:08 PM

#

"big"

chrome bay Nov 10, 2020, 2:08 PM

#

Would be nice actually if Epic would write a utility struct similar to FFastArraySerializer that would stream data out gradually

autumn vine Nov 10, 2020, 2:08 PM

#

For one time data it is quite small, on frame, ya it would be absurd.

chrome bay Nov 10, 2020, 2:09 PM

#

yeah I use the term "big" in relation to normal gameplay packets 😄

autumn vine Nov 10, 2020, 2:09 PM

#

Or is the throttling algorithm was just less sensitive to large one offs

#

I assume they're using something like a moving average. Could change it to be more "intelligent" about the occasional spike; especially within x seconds of a client connection

chrome bay Nov 10, 2020, 2:11 PM

#

IIRC they don't do any dynamic bandwidth control, it's just once you hit that cap they consider the connection "saturated" and send nothing more

autumn vine Nov 10, 2020, 2:12 PM

#

I mean that's about what was happening to me. And it got extremely oversaturated because a single property was so far over what was considered saturated that the connection got stalled for 20 seconds.

chrome bay Nov 10, 2020, 2:13 PM

#

yeah

#

it's probably trying it's best to get other actors through as well instead of choking on the one property

autumn vine Nov 10, 2020, 2:14 PM

#

I haven't yet looked much at the underlying code, but I'm assuming this fast array of ustructs will be more efficient network-wise as small amounts of data in the structs changes compared to a regular tarray of uobjects?

#

@chrome bay In this test case, the gamestate, playercontroller, playerstate, etc were all that was set to replicate actor-wise. Nothing in the level.

chrome bay Nov 10, 2020, 2:16 PM

#

the advantage of FFastArraySerializer is that it will only send 'dirty' items, but the indices aren't preserved and the full item will be sent each time

#

Whereas with TArray I believe if the elements/number of elements are changed, it can potentially send the entire array again - though I can't remember the specifics now

autumn vine Nov 10, 2020, 2:19 PM

#

Full item? Ouch. This was originally stored in a TSet until networking got added; indices don't matter here. Hmmm I may use TArray then, array size does not change after initialization, just the data in each object

#

And UObjects can serialize individual UPROPERTIES iirc?

chrome bay Nov 10, 2020, 2:20 PM

#

Yeah same as an actor/actor component etc.

#

But the downside is you need to replicate the UObject itself then too, which has to be done through an actor

autumn vine Nov 10, 2020, 2:21 PM

#

Ya I already have all of that code written. I was doing it that way and getting the massive stall. Which made me try the fast array

chrome bay Nov 10, 2020, 2:21 PM

#

if you change a UPROPERTY inside a struct, then so long as you don't have a custom NetSerialize() function, only the changed property will be sent

#

And I believe the same is true for structs within an array

#

So sometimes a regular TArray property can be preferable over a FastArray

autumn vine Nov 10, 2020, 2:22 PM

#

Ahhhh interesting. I guess that is easy to confirm with the network insights tool.

#

I hadn't used the UnrealInsights tool until yesterday. It blows the SessionFrontend away.

chrome bay Nov 10, 2020, 2:23 PM

#

yeah, the old net profiler is still useful too

autumn vine Nov 10, 2020, 2:24 PM

#

Thanks again for your help with talking all of this through!

chrome bay Nov 10, 2020, 2:26 PM

#

Hmm this might be interesting to you

#

net.MaxConstructedPartialBunchSizeBytes
net.PartialBunchReliableThreshold

#

just found those digging around UDN

#

But yeah the older suggested solution to this was indeed to throttle somehow via gamecode

#

    net.PartialBunchReliableThreshold
to a small non-zero value, such as 4 or 8. This will help mitigate packet loss that would otherwise cause an entire large array to be repeatedly resent.```

autumn vine Nov 10, 2020, 2:42 PM

#

@chrome bay I've apparently got a udn account, just have never set it up. Sounds like I definitely need to. Company prevents me from asking any questions on there because of some language in the eula for udn lol.

silent valley Nov 10, 2020, 3:06 PM

#

@autumn vine careful with net.DisableBandwithThrottling it's not valid for SHIPPING builds!

autumn vine Nov 10, 2020, 3:08 PM

#

@silent valley worst case I make it valid for shipping builds 👹

silent valley Nov 10, 2020, 3:10 PM

#

💪 💪 💪

rose egret Nov 10, 2020, 3:32 PM

#

@autumn vine whats you big data cant u just compress them ?

winged badger Nov 10, 2020, 3:33 PM

#

@autumn vine server either creates the initial data from purely static data

#

or static data and random

#

either way, you can get away with replicating as little as single int32

#

for your intial conditions

#

provided none of them depend on player input

autumn vine Nov 10, 2020, 3:43 PM

#

@winged badger ICs come from a different process running on the same machine as the server ue4 process

#

Not my design choice, but I’m stuck with it. Server is completely dumb until it receives the ICs from the other process. No way to seed the client except send the full ICs

royal rampart Nov 10, 2020, 3:56 PM

#

hey guys, small question, what if you want to implement a simple timer that is visible on the players HUD at all times, obviously the server needs to track the time but how do i replicate something like this? isnt it unnecessary server traffic to update the time every second for example?

#

i also thought that maybe the server just says start and the clients start counting themselves but then you have the problem that a guys timer with bad ping will start later

#

I really need it to be exact for all the clients

red musk Nov 10, 2020, 3:58 PM

#

Prob just make it a replicated variable

#

Sending it regularly isn’t so bad, like location on replicated actors

royal rampart Nov 10, 2020, 3:59 PM

#

a replicated variable in the gamestate right?

#

thanks for answering btw 🙂

red musk Nov 10, 2020, 4:00 PM

#

Could be on anything really

chrome bay Nov 10, 2020, 4:00 PM

#

You can never make it "exact" as such, but replicating an int that counts up/down is probably fine

#

You can use a timestamp otherwise

#

And link it to the game states' ServerWorldTimeSeconds then round it

royal rampart Nov 10, 2020, 4:02 PM

#

okay okay perfect 🙂 thanks guys for replying so quick!!

chrome bay Nov 10, 2020, 4:02 PM

#

it's good enough to just show a match timer usually

royal rampart Nov 10, 2020, 4:02 PM

#

yeah were making a multiplayer fast-paced handball game and we just need it to track time and I was wondering if unreal had something special for that

#

sounds like im just gonna replicate a variable

twin juniper Nov 10, 2020, 4:11 PM

#

Are there any examples anywhere for getting the unique net id for each player ?

chrome bay Nov 10, 2020, 4:14 PM

#

APlayerState::GetUniqueId()

twin juniper Nov 10, 2020, 4:19 PM

#

😅

keen thorn Nov 10, 2020, 4:44 PM

#

Yeah that's definitely the right thing for session based, but our game is persistent world with fixed dedicated servers per territory.
@silent valley thats very cool, have you guys considered SpatialOS?

polar wing Nov 10, 2020, 4:44 PM

#

hahaha, I've been there a lot. Hey, how do I get this special thing? Oh, there's a function.

keen thorn Nov 10, 2020, 4:46 PM

#

im curious how you guys split servers into spatial regions ingame, or are ur worlds small and dont need cross server persistency?

silent valley Nov 10, 2020, 4:47 PM

#

@keen thorn actually yes we prototyped a game in SpatialOS for about a month before we started down this route. Very impressive for what it is, but we didn't need the full capability of SpatialOS.

In our design the worlds are small enough to be entirely hosted on a single server, so no need for SpatialOS.

keen thorn Nov 10, 2020, 4:47 PM

#

aha cool, i guess you guys implemented replication graph to minimize replication yes?

royal rampart Nov 10, 2020, 4:48 PM

#

it is normal that my tick in my derived gamemode class doesnt get called? o_0

keen thorn Nov 10, 2020, 4:48 PM

#

how did you guys feel about SpatialOS btw, im also curios and wanna try

silent valley Nov 10, 2020, 4:48 PM

#

Yes we have a basic RepGraph framework setup, but we've not done much profiling or stress testing at this stage.

keen thorn Nov 10, 2020, 4:48 PM

#

right

silent valley Nov 10, 2020, 4:50 PM

#

Re: SpatialOS I think it's worth firing up a trial and building the sample app. Very impressive tbh, but I gotta say it was such a big complex system that it made me nervous thinking about how our small team would be able to handle sucgh a big black box in the run up to release.

keen thorn Nov 10, 2020, 4:50 PM

#

right

#

currently Its the only viable option for spatialization across servers no?

#

cus UE4 servers are single instanced atm

#

not suitable for mmo stuff

silent valley Nov 10, 2020, 4:51 PM

#

By nature I'm quite cautious so the more 3rd party libs/systems involved makes me worried.
Yes that's right, nothing out of the box in UE4 for MMO.

#

I don't know if Rare have released any details how their system works for Sea of Thieves?

keen thorn Nov 10, 2020, 4:51 PM

#

Im not sure

#

but for small teams i dont think MMO is within indie team's capabilities atm

silent valley Nov 10, 2020, 4:52 PM

#

100%

keen thorn Nov 10, 2020, 4:53 PM

#

btw if u guys need tester for ur multiplayer game i would love to try

#

😄

silent valley Nov 10, 2020, 4:53 PM

#

🙂

keen thorn Nov 10, 2020, 4:53 PM

#

I myself just finished a multiplayer game that will launch for few thousand users... fingers crossed nothing goes wrong. The servers run on gamelift with custom matchmaking server

#

its my first one that will go kinda large scale for an event

kindred widget Nov 10, 2020, 4:54 PM

#

@royal rampart Tick is disabled in GameMode by default if I'm not mistaken. You might have to set it in the constructor in your inheriting class.

silent valley Nov 10, 2020, 4:54 PM

#

cool, early days still, hopefully in 12 months tho!

#

damn, nice work

royal rampart Nov 10, 2020, 4:54 PM

#

@royal rampart Tick is disabled in GameMode by default if I'm not mistaken. You might have to set it in the constructor in your inheriting class.
@kindred widget thanks, just fixed it 🙂

keen thorn Nov 10, 2020, 4:54 PM

#

internally we play it fine, no bugs yet, but never know when things scale up, will be an experience to learn

silent valley Nov 10, 2020, 4:55 PM

#

yeah are you softlaunching / beta?

keen thorn Nov 10, 2020, 4:56 PM

#

no we created it for an event. you know cus of covid19 so some event maker (our client) wanted to create virtual online event

#

normally they create a festival outdoor

#

but now they have to do it online

silent valley Nov 10, 2020, 4:56 PM

#

😬

#

You'll be fine!

#

sounds awesome

keen thorn Nov 10, 2020, 4:56 PM

#

basically a virtual festival with multiplayer battle game

#

ye i hope it will be fine as well 😄

#

Anyone here have some experience with OnlineBeacons?

rich ridge Nov 10, 2020, 5:15 PM

#

Engine have working code for beacon

#

PartyBeacons

summer tide Nov 10, 2020, 5:25 PM

#

Trying to replicate Spawn Sound At Location. I have a server Event and Multicast. Multicast has the Spawn Sound At Location and a variable. I also have the same event setup to stop the sound.

sharp niche Nov 10, 2020, 5:35 PM

#

@summer tide where does the server event get fired? only controller & pawn can do rpc calls

summer tide Nov 10, 2020, 5:35 PM

#

In char BP

#

The thing the sound replicates but it sounds like it plays multiple times and doesn’t stop on time

#

Behaves diff than server

summer tide Nov 10, 2020, 6:02 PM

#

@rich ridge I know that using beacon you can create steam party without a lobby. Do you know if you can totally avoid the usage of OpenLevel at all? I've streamable levels and I don't want to use OpenLevel ?listen.

autumn vine Nov 10, 2020, 6:09 PM

#

Anyone know off the top of their head how to up the ue4 packet size? Seems to be limited to ~8000 bits

tranquil yoke Nov 10, 2020, 6:27 PM

#

[2020.11.10-18.26.32:298][107]LogNetSerialization: Error: FBitReader::SetOverflowed() called! (ReadLen: 1, Remaining: 0, Max: 75)
What does this means , it showing on server

round star Nov 10, 2020, 6:29 PM

#

Simple question..what is the difference between game mode base and game mode..and game state and game state sub class...I mean I assume the sub class and game mode inherit in a hierarchy...is one more difficult to work with then the other and why would you use one over the other

kindred widget Nov 10, 2020, 6:31 PM

#

@autumn vine It's 10k bits by default. You can up that by adding a few lines to your project's DefaultEngine.ini

#

This one works for me at least for testing. Sets it to 1Mb/s Overkill, but eh, testing.

ConfiguredInternetSpeed=1000000
ConfiguredLanSpeed=1000000

[/Script/OnlineSubsystemUtils.IpNetDriver]
MaxClientRate=1000000
MaxInternetClientRate=1000000```

#

Oh, I just reread that. Did you mean the general bandwith or the literal size of each packet?

crisp sentinel Nov 10, 2020, 6:40 PM

#

hi,
what is the better solution to make a networked inventory:
-replicated slots and item
or
rpc management like create an item on server and if ok call create item on client

kindred widget Nov 10, 2020, 6:56 PM

#

It depends on what you need the inventory for and how your game is going to be set up. There is no 'best case'.

tranquil yoke Nov 10, 2020, 6:57 PM

#

Hey, anyone can look at my network profiler data and can tell me is it bad or good ?

crisp sentinel Nov 10, 2020, 6:58 PM

#

@kindred widget something for a survival game like

#

in replicated inventory there are the possibility to reference an object by network

kindred widget Nov 10, 2020, 7:10 PM

#

Still depends. For example. I made an inventory system once that was nothing more than a replicated TArray of a struct that was an Int32, uint8, and an enum. Weapons and the like really had no 'state'. Durability on weapons and tools was the uint8, which also counted for item stacks of items that could stack. The enum was a quality modifier and the int32 was the Item's internal ID. Client and server independently populated a non replicated array in Gamestate from a datatable that was all item's information. Name, Weaponclass, etc etc and all of that could be gotten with the ItemID. I had another data table for crafting recipes that could take stuff from the inventory via the ItemID and the uint8 stacksize/durability. It worked incredibly well, but it was also very complex. Every item in game could have an InventoryComponent and the RPCs to interact with other components was all done through the player's inventory component on their character.

crisp sentinel Nov 10, 2020, 7:12 PM

#

ok i understand

#

but it s give more control i think

#

@kindred widget the problem for me is how to designe the notification systhem cause in version with rpc it more simple to handle this stuff on the client part

#

and in a replicated pattern the only way i found was to get a notification component to keep the ref as soon as the player were correctlly notify
because if i don t replication will override data and you couldn t know what was here before

twin juniper Nov 10, 2020, 7:20 PM

#

Does calling GetPlayerState in a pawn class get that specific pawn's player state or the client's actual player state?

autumn vine Nov 10, 2020, 7:21 PM

#

@kindred widget I meant literal packet size 🙃

rich ridge Nov 10, 2020, 7:26 PM

#

@summer tide the servers basically run BeaconHost.. and when a beacon clinet tries to connect to BeaconHost via ip and port you just send the message to client.

#

Party beacon code in Engine doesn't mean that it has to be party to function.. that party beacon code is coupled with OSS and can be used for ping to server as well.

#

When I was using party beacon I used for reservations on server as a single player not as a party leader

meager spade Nov 10, 2020, 8:03 PM

#

@twin juniper Pawn's don't have a player state

#

Controllers have a player state

twin juniper Nov 10, 2020, 8:10 PM

#

So..calling GetPlayerState will essentially always return that controllers player state no matter where you call it? @meager spade

#

I thought pawns can call GetPlayerState to get the state associated to their pawn..

meager spade Nov 10, 2020, 8:10 PM

#

well the pawn caches the playerstate

#

when its possessed

#

https://gyazo.com/6af45c0f9c268cc3a5129e90415f0670

Gyazo

twin juniper Nov 10, 2020, 8:11 PM

#

Okay I think I see, because i"ve been calling GetPlayerState inside IsNetRelevantFor and it's always returning the same state, I assumed it would return the state associated to the pawn it was called in such as "this"

#

So I assume this->GetPlayerState() is different than GetPlayerState()?

meager spade Nov 10, 2020, 8:11 PM

#

eh?

#

this-> is redundant

#

this->GetPlayerState() == GetPlayerState()

twin juniper Nov 10, 2020, 8:12 PM

#

But isn't IsNetRelevantFor called for each pawn individually? Which means anytime it calls GetPlayerState it should return the state associated with that specific pawn?

meager spade Nov 10, 2020, 8:13 PM

#

correct

twin juniper Nov 10, 2020, 8:13 PM

#

Perfect however when I call it, it just returns the same player state everytime despite how many pawns are in the game.

meager spade Nov 10, 2020, 8:13 PM

#

how do you know its the same playerstate?

twin juniper Nov 10, 2020, 8:14 PM

#

I'm checking the pointer

meager spade Nov 10, 2020, 8:14 PM

#

did you check a property on it that is guarenteed to be unique?

twin juniper Nov 10, 2020, 8:14 PM

#

UE_LOG(LogTemp, Warning, TEXT("IsNetRelevantFor called on state:%p"), GetPlayerState());

#

Like so

meager spade Nov 10, 2020, 8:14 PM

#

like PlayerName ?

twin juniper Nov 10, 2020, 8:14 PM

#

No but the pointer should be different right..?

meager spade Nov 10, 2020, 8:14 PM

#

sure

twin juniper Nov 10, 2020, 8:14 PM

#

Or should I just use GetName or something else instead

#

Hmm maybe I'm not doing something right.

#

I'll double check

meager spade Nov 10, 2020, 8:14 PM

#

UE_LOG(LogTemp, Warning, TEXT("IsNetRelevantFor called on state: %s"), *GetNameSafe(GetPlayerState()));

#

could try that

twin juniper Nov 10, 2020, 8:15 PM

#

Oh cool thanks

#

I'll try that.

meager spade Nov 10, 2020, 8:15 PM

#

see if it prints different

twin juniper Nov 10, 2020, 8:21 PM

#

Yes @meager spade It prints the same thing repeatidly...

meager spade Nov 10, 2020, 8:21 PM

#

and that actor is different?

twin juniper Nov 10, 2020, 8:22 PM

#

correct

#

Well why do you mean by different?

meager spade Nov 10, 2020, 8:22 PM

#

UE_LOG(LogTemp, Warning, TEXT("IsNetRelevantFor called on %s with PS: %s"), *GetNameSafe(this), *GetNameSafe(GetPlayerState()));

twin juniper Nov 10, 2020, 8:22 PM

#

I place it inside my character class

#

So am I doing it wrong by overriding the method inside my character class because what I'm assuming the listen server is doing is going through all the actors in the level and calling the overrided method for them

meager spade Nov 10, 2020, 8:23 PM

#

you probably have broken something

#

no clue, i can't see your code

twin juniper Nov 10, 2020, 8:23 PM

#

Oh here

meager spade Nov 10, 2020, 8:23 PM

#

nor can i see what you are doing

twin juniper Nov 10, 2020, 8:24 PM

#

So that's the character class overriding the method

#

and every client connected uses that character class

#

or every actor

meager spade Nov 10, 2020, 8:25 PM

#

why are const casting

twin juniper Nov 10, 2020, 8:25 PM

#

That was just so I could pass them into my gaamemode method.

meager spade Nov 10, 2020, 8:25 PM

#

but.. why?

twin juniper Nov 10, 2020, 8:25 PM

#

Should I not const_cast?

meager spade Nov 10, 2020, 8:26 PM

#

anyway, i don't know what is going wrong then, but why do you need the player state for relevancy check? is it like team based?

twin juniper Nov 10, 2020, 8:26 PM

#

yes

meager spade Nov 10, 2020, 8:26 PM

#

also never cast like this (AActor*)this

twin juniper Nov 10, 2020, 8:26 PM

#

okay

meager spade Nov 10, 2020, 8:26 PM

#

you should just make your AreActorsRelevant function const

#

no need for const cast

twin juniper Nov 10, 2020, 8:26 PM

#

okay

meager spade Nov 10, 2020, 8:26 PM

#

go clean that up

#

and show me again, cause i am cringing reading it 😄

#

you also removed some additional checks

#

like i sent you before

#

meaning the controller will never replicate to owning client etc

#

you must have this as your first few lines

#

        || IsBasedOnActor(ViewTarget) || (ViewTarget && ViewTarget->IsBasedOnActor(this)))
    {
        return true;
    }```

#

else you will break things!

twin juniper Nov 10, 2020, 8:30 PM

#

There was a problem with that though.

#

When I put that in the code,

#

my listen server began lagging severely.

#

And when I removed it, it ran fine.

#

So something with that.

meager spade Nov 10, 2020, 8:31 PM

#

that would not cause lag

twin juniper Nov 10, 2020, 8:31 PM

#

Was causing me to lag.

meager spade Nov 10, 2020, 8:31 PM

#

that is engine code

twin juniper Nov 10, 2020, 8:31 PM

#

That was the only variable I was changing though,

#

When I was testing the lag .

#

And when I would add it, I would lag severely.

#

And when Iw ould remove it, the lag would clear.

#

So I'm not sure.

#

But I can put it back in.

meager spade Nov 10, 2020, 8:31 PM

#

that would not cause lag

twin juniper Nov 10, 2020, 8:32 PM

#

I'll take your word for it.

meager spade Nov 10, 2020, 8:32 PM

#

ah

#

you might need to do this

#

    if (bAlwaysRelevant || RealViewer == Controller || IsOwnedBy(ViewTarget) || IsOwnedBy(RealViewer) || this == ViewTarget || ViewTarget == GetInstigator()
        || IsBasedOnActor(ViewTarget) || (ViewTarget && ViewTarget->IsBasedOnActor(this)))
    {
        return true;
    }```

#

put the CA_SUPPRESS above it (if you get warnings)

twin juniper Nov 10, 2020, 8:33 PM

#

so should I remove my own checks

#

and just replace it with that.

meager spade Nov 10, 2020, 8:35 PM

#

    CA_SUPPRESS(6011);
    if (bAlwaysRelevant || RealViewer == Controller || IsOwnedBy(ViewTarget) || IsOwnedBy(RealViewer) || this == ViewTarget || ViewTarget == GetInstigator()
        || IsBasedOnActor(ViewTarget) || (ViewTarget && ViewTarget->IsBasedOnActor(this)))
    {
        return true;
    }
AVisibilityZeroGameMode* VisGameMode = Cast<AVisibilityZeroGameMode>(GetWorld()->GetAuthGameMode());
AVisibilityZeroCharacter* ViewTargetCharacter = Cast<AVisibilityZeroCharacter>(ViewTargetActor);
const bool bIsRelevant = VisGameMode->AreActorsRelevant(GetPlayerState(), this, ViewTargetCharacter->GetPlayerState(), ViewController, ViewTargetActor);

    return bIsRelevant ? Super::IsNetRelevantFor(RealViewer, ViewTarget, SrcLocation) : false;
}```

twin juniper Nov 10, 2020, 8:36 PM

#

Alright yes that's how I set it up too

#

Okay let me test

#

if the print is different now.

#

@meager spade it's still printing the same state every time

#

So for whatever reason, I'm not sure what.. it's only being called for one actor and not on every connected actor

twin juniper Nov 10, 2020, 9:03 PM

#

Could it be that IsNetRelevantFor is never called on the listen server's actor/controller?

#

But every other client connected to the listen server.

meager spade Nov 10, 2020, 9:05 PM

#

it should be called

#

spawn 2 clients and listen server

twin juniper Nov 10, 2020, 11:12 PM

#

@meager spade I tested with two clients and a listen server and it gets called for the two clients but never the listen server.

#

And I think this actually makes sense..

#

Because technically the clients are always going to have to be relevant

#

to the listen server

#

They don't have a choice

summer tide Nov 10, 2020, 11:39 PM

#

Anybody knows where it went wrong in client? Server looks fine. @inner cove
https://gyazo.com/8e59a497a8a8015c6cbd2aeec2c56484

Gyazo

▶ Play video

#

So I have attached my character to the horse and from my character I pass the axis values via server event.

woeful sigil Nov 10, 2020, 11:50 PM

#

Ohhhhhh boy, I have a problem.

It's one of those days where the deadline is today and I thought I would be able to get done what I wanted to get done by now but nope, can't.

I was tasked with making a small server as a demonstration for a company, I've never worked in networking before so naturally I followed this tutorial: https://www.youtube.com/watch?v=QGrRV-11sx4&t=3s to a tee, and I've basically gotten everything done properly except for two issues.

The server doesn't recognise the ServerMap that I've created in the project, nor is it able to find it when I have the line "/Game/Maps/ServerMap -log" written in the shortcut, everytime it will fail to find the map.
When I try to open up the server on localhost with 127.0.0.1 the server will throw up a bunch of code but it won't say that I've connected to the actual server, and I have no clue how to fix this.

Obviously the client won't connect because even the localhost can't connect to the server, I have no experience in networking so any help or opinion would be much much much appreciated.

YouTube

Smart Poly

How To Make A Dedicated Server - Unreal Engine 4.25

Hello guys welcome to another tutorial. Today I will show you guys how to compile a dedicated server for your own game. This will allow you to host your own server, and have anyone join it from across the world. I demonstrate this by putting the packaged final game on a usb an...

▶ Play video

vale ermine Nov 11, 2020, 12:00 AM

#

No that that is done the multiplayer kit comes next 😄

woeful sigil Nov 11, 2020, 12:00 AM

#

Multiplayer Kit?

arctic turret Nov 11, 2020, 12:11 AM

#

Guys, do you have any tips for someone trying understand how prediction works in the gameplay ability system? I can not seem to follow the execution flow

shrewd terrace Nov 11, 2020, 12:47 AM

#

Hey, I need some kind of advice here. If i'm working on a vehicle movement component using Physx AddForce is it possible to replicate and using Client Side Prediction and Server Reconciliation with it? or i have to have my own "AddForce" to be able to simulate?

winged badger Nov 11, 2020, 12:55 AM

#

unlikely @shrewd terrace

#

physx is not deterministic

#

which makes network scenarios really difficult to control

#

@arctic turret i seem to remember a full 2 page explanation in comments in the header where PredictionKey was defined

shrewd terrace Nov 11, 2020, 12:58 AM

#

@winged badger thanks, does that mean that ACharacter doesn't use Physx? cuz AFAIK it works pretty well in multiplayer

winged badger Nov 11, 2020, 12:59 AM

#

CMC works... okay

#

when its not affected by physics

#

when it is, sure, no lag PIE scenario seems okay

#

enter net pktlag=200 into console and watch it explode

shrewd terrace Nov 11, 2020, 1:07 AM

#

thanks

velvet brook Nov 11, 2020, 1:51 AM

#

So I'm currently using 4.25.1 source build and just found out GameLift supports 4.24. Is there any way around this? or do i have to change version.

tawdry wing Nov 11, 2020, 1:55 AM

#

Hey all, I have a maybe stupid question but do the footsteps sound should be replicated if yes how ? 😀

winged badger Nov 11, 2020, 1:58 AM

#

they shouldn't

#

just play them off of anim notify

#

locally

tawdry wing Nov 11, 2020, 2:04 AM

#

Thanks ! 😀 I was not sure about that.

peak sentinel Nov 11, 2020, 4:26 AM

#

📎 unknown.png

#

Is there any difference between two?

tranquil yoke Nov 11, 2020, 6:37 AM

#

What could be the reason of Client dsync on server, and both clients see each other at different places.

thin stratus Nov 11, 2020, 7:02 AM

#

Anyone made a Replicated Actor Pool? Was there an option to have them AlwaysRelevant but at the same time dormant?
Trying to see if we can somehow have a pool of actors that would otherwise be spawned nearly all at once and use up too much bandwidth for the initial spawn.

vale ermine Nov 11, 2020, 7:44 AM

#

Need to focus on replicating the player controller and not the actors. You pool them on the client and have them not replicated from the server. The client sends inputs to the server and the server will either accept the input or decline it. I would work on sending the world actors data to the players and the client simulate its own actor pools based on the data. Then the server just verifies if it will accept the input. It might not work that way but it how I would think it should be done.

#

Once you are using the client pool you can use the world actor data replicated to your player to fake everything.

vivid seal Nov 11, 2020, 7:46 AM

#

Im trying to figure out the best way for a client to send extra data to the server of basically any type. Essentially I want to have an “ActivateServerAbility” RPC that a client component can call, passing a struct of arbitrary stuff that an ability needs from the client to execute on the server, like a HitResult, transform, or object/actor pointer. I don’t want to create separate functions for “ActivateServerAbilityWithHitResult,” “ActivateServerAbilityWithPointer,” etc. for obvious reasons, but struct inheritance doesn’t work in blueprint, templates don’t work on blueprint, and I can’t use an object to contain this data since I’d need to replicate it (since I’m sending from client to server). TUnion is also not exposed to blueprint, and I don’t if UE has a variant type but I doubt it’s exposed to blueprint either.

thin stratus Nov 11, 2020, 7:48 AM

#

It has a Variant type

#

But it's not exposed to BPs

#

And yeah, you won't be able to get this working in BPs afaik

#

Even if you setup customthunk stuff to allow wildcard structs, it will fail when sending it via RPCs

vivid seal Nov 11, 2020, 7:49 AM

#

Yeah I found the forum post with the custom thunk wildcard stuff and it seemed kind of clunky and I don’t know enough to understand what it was doing

thin stratus Nov 11, 2020, 7:49 AM

#

I know that the #gameplay-ability-system uses EffectContext and last time I talked with Epic they said they just push everything into that and use the serialization to nuke things that aren't needed for a specific ability

#

So basically, a huge struct with all data that could be needed, but the serialization makes sure only the required things are actually send over.
But that's also less than ideal in my head.

#

Doubt there is much you can do.

#

At least with ue4's native stuff

winged badger Nov 11, 2020, 7:51 AM

#

@thin stratus why always relevant? so they are not destroyed on clients when they become non-relevant?

thin stratus Nov 11, 2020, 7:51 AM

#

Yeah, because then they would all be spawned in again I assume. I also don't yet know what is actually eating up the bandwidth that much when they spawn (it's pickup actors).

winged badger Nov 11, 2020, 7:52 AM

#

our approach with pickups is

thin stratus Nov 11, 2020, 7:52 AM

#

But I would assume the required setup would be an actor that is relevant and not active for the time being in the pool

winged badger Nov 11, 2020, 7:52 AM

#

spawn on server and client separately from the same seed

#

and keep dormant until they are interacted with

thin stratus Nov 11, 2020, 7:52 AM

#

Yeah, we have lots of data that the server determines before actively spawning it

#

The Client probably can't simulate that

#

At least not in a way that doesn't require me to spent lots of hours that aren't available

winged badger Nov 11, 2020, 7:53 AM

#

this approach requires

#

spawning them with exact same name on all machines

thin stratus Nov 11, 2020, 7:53 AM

#

Yeah I know, so they are netaddressable

winged badger Nov 11, 2020, 7:53 AM

#

overriding IsNameStable, isFullNameStable

#

and also

thin stratus Nov 11, 2020, 7:54 AM

#

I think that works even without overriding those. Can't recall us doing that.

winged badger Nov 11, 2020, 7:54 AM

#

bNetStartupActor and bNetLoadOnClient to true

thin stratus Nov 11, 2020, 7:54 AM

#

At least for components

winged badger Nov 11, 2020, 7:54 AM

#

ah

#

idea is to let them replicate

#

even though they are spawned locally on client

thin stratus Nov 11, 2020, 7:54 AM

#

Yeah exactly, we have a setup for that for Components.

#

Where they are spawned with the exact same name on server and client

#

And then made netaddressable

#

Just have to make sure you never send a package from server to client before the client has their instance

#

:D Ran into that problem already

winged badger Nov 11, 2020, 7:55 AM

#

slightly different with Actors, have to force the static NetGUID

thin stratus Nov 11, 2020, 7:55 AM

#

Hm

winged badger Nov 11, 2020, 7:56 AM

#

but if they have static NetGUID

#

they don't get destroyed while not relevant

thin stratus Nov 11, 2020, 7:57 AM

#

Right. Let's say I only spawn them on the Server and have them replicate by default.
What setup is required to have them sit in place on server and client until I need them?

winged badger Nov 11, 2020, 7:57 AM

#

they get treated exactly as if they were loaded from package

#

that is already too late

thin stratus Nov 11, 2020, 7:57 AM

#

I guess I barely save anything, as they still need their data replicated when the Server determines it

winged badger Nov 11, 2020, 7:57 AM

#

client doesn't resolve static and dynamic NetGUID in the same way

#

with static, its "oh i don't have this actor yet, but im sure im about to load it, so i'll just wait resolving this NetGUID for a bit"

#

and with dynamic, it spawns a new Actor

thin stratus Nov 11, 2020, 7:59 AM

#

What controls static vs dynamic?

winged badger Nov 11, 2020, 7:59 AM

#

bNetStartupActor on spawn

#

last bit in NetGUID

thin stratus Nov 11, 2020, 8:00 AM

#

Okay so:

Spawn (non-replicated?) Actor on Client and Server with exact same name (?).
Set bNetStartupActor to TRUE
Set bNetLoadOnClient to TRUE
Override IsNameStable (and do what?)
Override IsFullNameStable (and do what?)

winged badger Nov 11, 2020, 8:01 AM

#

4,5 return true for that actor instance

thin stratus Nov 11, 2020, 8:01 AM

#

So just a flat return true;

winged badger Nov 11, 2020, 8:01 AM

#

we can drop items

#

so its true if it has a generic actor tag

thin stratus Nov 11, 2020, 8:03 AM

#

So if one has a pool of those Actors, what are the steps to utilize them as well as returning them to the pool if used?
I assume I would have some logic on the Server that says "These 15 items were looted. I need 15 pickup actors." and then it grabs them from the pool.

#

Unless you perform that on both server and client, which we won't do

winged badger Nov 11, 2020, 8:03 AM

#

in this setup, you can turn their replication on afterwards

#

and it will work

thin stratus Nov 11, 2020, 8:04 AM

#

So I would fill in the data, turn on replication, and once they done their job, turn off replication, clear the data, and send them back to the pool?

winged badger Nov 11, 2020, 8:04 AM

#

we augment the approach with a manager actor with ffastarrayserializer

#

its most basic form is FFastArraySerializerItem that has

#

UPROPERTY() TWeakPtr<UObject> ReplicatedObject;
UPROPERTY() TArray<uint8> Data;

thin stratus Nov 11, 2020, 8:07 AM

#

Right, so your pool is utilizing that?

winged badger Nov 11, 2020, 8:07 AM

#

post rep callbacks access the object and call PostReplication() or some such function on it

thin stratus Nov 11, 2020, 8:07 AM

#

Gotta have to look into FastArraySerializer eventually >.>

winged badger Nov 11, 2020, 8:07 AM

#

when server changes something on the object it encodes it in byte array

#

and pushes the change to the NetworkManagerActor

#

when clients receive the item, they send the data to their own version of the object

#

and then object decodes it and applies the effects

#

lets you run a push system where 1 Actor is responsible for replicating few hundred Actors

#

they are not evaluate for replication or replicated

thin stratus Nov 11, 2020, 8:09 AM

#

What if the objects are actors already? Do you have all data set to not replicate?

#

I assume so, as otherwise that would make no sense

winged badger Nov 11, 2020, 8:10 AM

#

the moment they register with network manager

#

SetIsReplicated(false)

#

mine can work just fine without it

#

but they don't replicate if they have a network manager

thin stratus Nov 11, 2020, 8:11 AM

#

Yeah okay, that's something on top of the pooling though

winged badger Nov 11, 2020, 8:11 AM

#

we actually didn't do pooling in the whole story 😄

#

but

thin stratus Nov 11, 2020, 8:11 AM

#

Yeah

winged badger Nov 11, 2020, 8:11 AM

#

the 2nd approach unburdened our network tons

#

got 1800 Actors that are not replicated, instead using 16 network managers

thin stratus Nov 11, 2020, 8:12 AM

#

But even with such a setup, the amount of data to replicate if 50 Pickups are required, stays the same, or not?

winged badger Nov 11, 2020, 8:12 AM

#

and there is a cap on how much time server is allowed to spend evaluating actors for replication each frame

thin stratus Nov 11, 2020, 8:13 AM

#

Even if it's just a money pickup and the only value you replicate is the integer

#

It has to move from server to client either way

winged badger Nov 11, 2020, 8:13 AM

#

ah, when combined

#

i don't need to replicate anything

#

until one of the interactable actors is changed

thin stratus Nov 11, 2020, 8:14 AM

#

Right, the scenario here is opening some chest and receiving, let's say, 50 Pickups.
Right now they are spawned from the Server with whatever Data they need.
That's not so nice for our bandwidth

winged badger Nov 11, 2020, 8:14 AM

#

that scenario

thin stratus Nov 11, 2020, 8:14 AM

#

That's why I wanted to have them pre-spawned and requested when needed, so that at least the initial spawn of 50 actors is not part of this but only the transform and the item related data

winged badger Nov 11, 2020, 8:14 AM

#

if client can't take a seed and generate the same data as the server

#

you're fucked

thin stratus Nov 11, 2020, 8:15 AM

#

Haha, that's fair

#

Guess stuff like that is what you want to think about before implementing a system.
Lucky me wasn't around when that happened

#

Thanks for your time though (: learned a bit more

winged badger Nov 11, 2020, 8:16 AM

#

fastarray can still help

#

as you don't need to replicate whole actors

#

just bits client can't generate

#

getting that stable though.... that is not a quick afternoon's work

#

we do not spawn actors on client + server after world's BeginPlay

thin stratus Nov 11, 2020, 8:17 AM

#

Yeah, I guess the first step right now is to identify what is taking the bandwidth and reducing on that first.

winged badger Nov 11, 2020, 8:17 AM

#

and we don't have normal replication on on those Actors until after BeginPlay

thin stratus Nov 11, 2020, 8:18 AM

#

Yeah okay, we are far from having the option or time to add such a setup now

winged badger Nov 11, 2020, 8:18 AM

#

bright side

#

network manager implementation took me around 3 days

#

i made it work for InteractableComponent + payload

thin stratus Nov 11, 2020, 8:19 AM

#

The Systems setup usually doesn't take long yeah. However only if you don't already have a full system build around something that needs to change afterwards.

winged badger Nov 11, 2020, 8:19 AM

#

im also not sure you're suffering from bandwidth

thin stratus Nov 11, 2020, 8:19 AM

#

That said, you should write a blog post about that network manager. Might make some peeps happy

winged badger Nov 11, 2020, 8:19 AM

#

as you can just have problems evaluating that many actors

thin stratus Nov 11, 2020, 8:20 AM

#

Ah well, I can see other replicated stuff being delayed when that happens

winged badger Nov 11, 2020, 8:20 AM

#

non-optimized system will start breaking past 500ish replicated Actors active at the same time

thin stratus Nov 11, 2020, 8:21 AM

#

Yeah pretty sure my test didn't have that many in the level at that point. Far less even.
It also only starts to come in delayed the second all those pickups spawn

#

Even though the data in them, despite the overhead of AActor, is not much

#

Like, replication wise, it's maybe a location (where it has to drop to) and a e.g. an int for the value of it or so

#

NetworkProfiler will get some love next I guess

winged badger Nov 11, 2020, 8:23 AM

#

not on 4.25 yet?

thin stratus Nov 11, 2020, 8:24 AM

#

Why are you asking?

winged badger Nov 11, 2020, 8:24 AM

#

insights can probably tell you more

#

in this scenario

thin stratus Nov 11, 2020, 8:24 AM

#

Ah, yeah, wasn't aware of what that all offers. Haven't needed to touch it yet.

winged badger Nov 11, 2020, 8:25 AM

#

there is a smoke and mirrors approach, if those pickups don't need to be actors after they are picked up

#

then you can just put a fastarray in the chest

#

and have the client do a full simulation

#

just need to be netaddressable for that to work

dusk spire Nov 11, 2020, 8:39 AM

#

hi i have a little concern about component replication, so if i replicate a component that has member variables that get the replicated tag lets say health and mana for a unit, if something changes like health, but mana stays the same in the component, the data of the full component will be sent to the clients so both health and mana, or just mana since that is the only thing that is changed?

signal lance Nov 11, 2020, 8:41 AM

#

only stuff that changed is sent

dusk spire Nov 11, 2020, 8:51 AM

#

thanks for response i see

glad wharf Nov 11, 2020, 9:11 AM

#

hey all, I'm struggling with a UObject replicated property that does not get replicated on client object spawn. What is strange is that this property is replicated afterward, if server changes it, then it's correctly replicated to client.

#

This property is owned by an ActorComponent, and is a pointer to a UObject coming from a package

#

I tried to spawn the owning actor dynamically, put it directly in the level with always relevant and netloadonclient... Nothing works. I also override IsSupportedForNetworking() in the replicated uobject class definition.

#

what is strange is that networking is working for this property, but not before server changes the property again after the client connected.
For instance,

server starts with property = nullptr
Server changes property to "pointer to UObject_0"
Client connects, property will stay nullptr
Server changes property to "pointer to UObject_1"
Client receives a correct repnotify

#

I don't understand why on step 3, client does not trigger a rep notify and has its property value set to "UObject_0"

glad wharf Nov 11, 2020, 9:50 AM

#

I checked with another property on the same UActorComponent: for this other property, everything is working normally. What is strange is that this property is also a UObject, in the same Package that the other property 🤔
This other working property is initialized to nullptr in the same way in the actorcomponent constructor.

grizzled stirrup Nov 11, 2020, 9:57 AM

#

If you change the gamemode on seamless travel but the new gamemode uses the same playerstate, does CopyProperties not get called as usual?

#

It seems CopyProperties does get called but the old PS has default values when it shouldn't... does PlayerState->Reset get called if changing gamemode via seamless travel or something?

#

Ok it does seem that Reset is being called somewhere, probably in engine code

clever abyss Nov 11, 2020, 10:19 AM

#

Hey there!
I want to set up the multiuser team editing using a VPN on google cloud. Has anyone have experience how to start to do that?

rose egret Nov 11, 2020, 10:49 AM

#

is there any way to force a property to be replicated without changing the value ?

kindred widget Nov 11, 2020, 11:56 AM

#

@rose egret How come you need to replicate it if it hasn't changed?

rose egret Nov 11, 2020, 11:58 AM

#

I am doing some client side prediction, client changes several properties locally, cash, health, ...
then an RPC is sent to server for verification if verification failed, I want to replicate the new properties again.

#

it sounds easier than writing some rollback function for resetting properties in client

#

but it seems UE4 don't have such feature

#

I just want to say hay imagine this property is dirty, resend it

silent valley Nov 11, 2020, 12:02 PM

#

Should I be guarding all my PlaySound calls with if (GetNetMode() != NM_DedicatedServer) {} ?
Does it even do anything on dedicated server?

#

I mean, I know for sure it doesn't cause me any problems because some are guarded some are not, but I wonder how wasteful it is to call PlaySound on dedicated server

#

if it's sat in the cloud on a machine that doesn't even have an audio device

kindred widget Nov 11, 2020, 12:11 PM

#

It 'might' be possible. I don't think they normally write prediction that way though. Usually a client and server is supposed to just do the same thing which leads to the same value or nearly. But since server takes time to travel and update, the replicated value would always overwrite whatever the client does. So in that regard, the only RPC would still be just the one telling the server what the client wanted to do. For example, if you wanted to predict money and buying. You click buy. client lowers the money based on the item's cost, you rpc to server to tell it that you wanted to buy that item. Server also sets money along with the buying logic which replicates back to client a quarter second later and overwrites whatever the client set, which should be about the same unless the client is cheating.

grizzled stirrup Nov 11, 2020, 12:16 PM

#

Is there any way to not have PlayerStates get reset when seamless traveling to a different gamemode with a different playercontroller other than overriding APlayerController::SeamlessTravelFrom and copy paste what was in super but delete OldPC->PlayerState->Reset(); ?

chrome bay Nov 11, 2020, 12:23 PM

#

@silent valley engine already does it 99% of the time IIRC

#

You can use the pre-processor UE_SERVER to prevent the code from running at all on the dedicated server once compiled out

silent valley Nov 11, 2020, 12:43 PM

#

👍

peak sentinel Nov 11, 2020, 3:43 PM

#

is there any difference between two?

📎 unknown.png

#

📎 unknown.png

kindred widget Nov 11, 2020, 3:46 PM

#

Doesn't look like it. One is just an event calling and function to do something and the other is the event doing it directly. Both should only happen on the server.

peak sentinel Nov 11, 2020, 3:47 PM

#

Okay, thanks

vocal cargo Nov 11, 2020, 4:01 PM

#

is there any way of creating a widget in c++ and using BP widgets as components of that widget?

kindred widget Nov 11, 2020, 4:06 PM

#

@vocal cargo Do you mean a UserWidget that you can have C++ code in?

#

If that's what you mean, then in short, you need to create a C++ class that inherits from UUserWidget, and then make a BP class that inherits from that C++ class to be able to use the designer.

vocal cargo Nov 11, 2020, 4:15 PM

#

I meant, I downloaded an Asset from the marketplace that has BP only widgets

#

but I want to add them to a UUserWidget c++ class

twin juniper Nov 11, 2020, 4:23 PM

#

Is PlayerState::GetUniqueId() Replicated?

#

Meaning if I get a UniqueId For a player state on the server, should it be the same for when the client calls it on a player state?

tranquil yoke Nov 11, 2020, 5:24 PM

#

I have a wierd probelm, where if components are located to Head Component, Everything gets replicated, if not, Then it wont get replicated.

Like i have hands and Head, if hands are closer to the head, replicate, only one of them has this issue, if not, only on of them keeps replicating.

limber gyro Nov 11, 2020, 5:58 PM

#

Im spawning a AActor in the server with a server function, while the colision is there the actor doesnt show up? does any 1 have any ideas»

#

can confirm that it shows up on the server, its jsut not replicating for some reason?

tranquil yoke Nov 11, 2020, 6:04 PM

#

is it replicated ?

limber gyro Nov 11, 2020, 6:08 PM

#

yep

#

nvm i am an idiot xD

#

i ticked the replicated in the component and not in the object itself

hidden thorn Nov 11, 2020, 7:00 PM

#

Just wondering if anyone tried 4.26 Multiplayer and maybe Steam integration? Have you had any issues? Last time I did multiplayer was on 4.19 and I guess some things must've changed since then.

tranquil yoke Nov 11, 2020, 7:24 PM

#

Something already on the map, just wants to show it clients separately with there client side events only, Do i have to spawn it from client ??

winged badger Nov 11, 2020, 7:47 PM

#

@tranquil yoke played with NetCullDistance maybe?

round star Nov 11, 2020, 7:51 PM

#

What is the check in c++ for role authority

twin juniper Nov 11, 2020, 7:53 PM

#

HasAuthority()

winged badger Nov 11, 2020, 7:53 PM

#

GetLocalRole() == ROLE_Authority

twin juniper Nov 11, 2020, 7:54 PM

#

@winged badger I believe HasAuthority() is the shorthand version of that.

winged badger Nov 11, 2020, 7:54 PM

#

i prefer this because of different syntax coloring for the ROLE_Authority

#

easier to skim the code

twin juniper Nov 11, 2020, 7:54 PM

#

Since the listen server has access to all the player controllers, how can I get my own local PlayerController

round star Nov 11, 2020, 7:54 PM

#

There we go..thanks guys lol

twin juniper Nov 11, 2020, 7:55 PM

#

Isnstead of another clients.

round star Nov 11, 2020, 7:55 PM

#

GetLocalRole() == ROLE_Authority
@winged badger Thank you

twin juniper Nov 11, 2020, 7:55 PM

#

Do I call UGameplayStatics::GetPlayerController with index 0?

winged badger Nov 11, 2020, 7:55 PM

#

GetGameInstance()->GetFIrstLocalPlayerController()

twin juniper Nov 11, 2020, 7:55 PM

#

Will index 0 always return my own on a listen servdr?

#

oh okay

winged badger Nov 11, 2020, 7:55 PM

#

it will, but better not start developing bad habits

twin juniper Nov 11, 2020, 7:55 PM

#

Gotcha

#

thank you

limber gyro Nov 11, 2020, 8:33 PM

#

i am spawning an actor with an RPC, while it works fine in the server the clients see the actor spawned at the wrong location it has a slight offset to the left

#

any one faced anything like this?

twin juniper Nov 11, 2020, 8:34 PM

#

Could there be some collision issue?

limber gyro Nov 11, 2020, 8:34 PM

#

no its just a decal

ripe rover Nov 11, 2020, 8:39 PM

#

Hey everyone. I am working on a project that requires multiplayer. Can someone please recommend someone who does tutorials that covers everything from hosting, lobby to joining and UMG?

steel vault Nov 11, 2020, 8:45 PM

#

@limber gyro if the actor is set to replicates = true and the server is in charge of spawning it, then it should be in the same location when it's spawned.

#

You can also do a quick verification by setting it's location on the server to see if that updates its position properly on the clients as well

round star Nov 11, 2020, 8:57 PM

#

@limber gyro if the actor is set to replicates = true and the server is in charge of spawning it, then it should be in the same location when it's spawned.
@steel vault Is a variable is replicated from server the clients automatically get it..but if a client needs to update everyone, it sends a value to the server to send to clients?

#

sorry for tagging not sorry XD

stoic meadow Nov 11, 2020, 8:58 PM

#

it needs to tell the server to update

#

if server ever updates a variable - it replicates

#

as in

#

sorry, if it is set to replicate

steel vault Nov 11, 2020, 8:59 PM

#

@round star yes if you are a client and you need to update the position of an actor (be careful because this opens you up to cheating) then you tell the server it needs to move and the server handles moving it and everyone else should see its replicated position

stoic meadow Nov 11, 2020, 9:00 PM

#

I mean, I'd have an event called client side on (i.e.) W pressed, this is a event on server that replicates movement input.

round star Nov 11, 2020, 9:00 PM

#

Okay..and a multicast is meant for..if everyone needs to run the same function

steel vault Nov 11, 2020, 9:01 PM

#

Multicast is for a one off event that doesn't pertain to the state of something (which is what a replicated property is for). You can technically get away with not using multicast at all and using replicated variables for most things, but it depends on what you're trying to achieve.

#

If you want to send a message to everyone just once, then you can multicast

shut gyro Nov 11, 2020, 9:01 PM

#

Anyone get this packet handler message error before when trying to connect via beacons in Steam?

[2020.11.11-21.00.35:425][250]LogNet: Warning: PacketHander isn't fully initialized and also didn't fully consume a packet! This will cause the connection to try to send a packet before the initial packet sequence has been established. Ignoring. Connection: [UNetConnection] RemoteAddr: 76561199016571282:7787, Name: SteamNetConnection_1, Driver: SteamNetDriver_1 SteamNetDriver_1, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: EPIC:PUID: 000260a3badb42808d1f8a910f7cd066; EAID: INVALID

stoic meadow Nov 11, 2020, 9:01 PM

#

gosh I wish I had your knowledge xero

round star Nov 11, 2020, 9:02 PM

#

Yea that makes perfect sense

stoic meadow Nov 11, 2020, 9:02 PM

#

haha I truly still don't understand or at least have the confidence when it comes to UE4's replication

limber gyro Nov 11, 2020, 9:02 PM

#

multicast is ofr stuff that doesnt replicate from what i understand, you use it for networked VFX's for example

steel vault Nov 11, 2020, 9:02 PM

#

Lol if you read the channels of this discord you will pick things up really really quickly. The people here taught me everything I know and they're geniuses compared to me lol

stoic meadow Nov 11, 2020, 9:02 PM

#

that's very true.

round star Nov 11, 2020, 9:03 PM

#

Like if you were to set a variable that had some random int or whatever..and you multicast from function everyone would get a different value (unles of course thats what you wanted)

stoic meadow Nov 11, 2020, 9:03 PM

#

when I first started I would use mutlicast for absolutely everything.

#

Already a month or so in (to ue4 networking)I realise how silly I was being

#

that's why I love this server :)

cedar finch Nov 11, 2020, 9:03 PM

#

What is a optimal way to shoot and deal damage with a shotgun? I've tried everything I know but clients always lag/rubber band when shooting hordes of enemies with their shotgun. I tried shooting multiple linetraces for each pellet, then taking all of the hits and adding them into a single struct, then sending that struct to the Server using a "run on server" event. That event then applies damage to everything. Am I missing something? Or is my network logic flawed? Normal bullet weapons work fine but shotguns lag since they are shooting 8 linetraces in one shot which I guess is a lot of hits to apply damage to.

round star Nov 11, 2020, 9:04 PM

#

Aim for the h ead

stoic meadow Nov 11, 2020, 9:04 PM

#

8 line traces should not be causing lag.

steel vault Nov 11, 2020, 9:04 PM

#

@round star I don't think I follow you. If you multicast from the server, you are telling all of the clients the same thing.

round star Nov 11, 2020, 9:05 PM

#

@round star I don't think I follow you. If you multicast from the server, you are telling all of the clients the same thing.
@steel vault If the multicast had a variable be set with a random int theyd get different values

#

thats all I meant by it

stoic meadow Nov 11, 2020, 9:05 PM

#

not if it's a random int from stream though.

#

I don't think

steel vault Nov 11, 2020, 9:05 PM

#

Gotcha. Yea if you multicasted an event but didn't send any info just told them to generate one themselves yes it would differ. But if you sent the random value in the multicast itself everyone gets that value

stoic meadow Nov 11, 2020, 9:06 PM

#

Oh. That's what they meant.

round star Nov 11, 2020, 9:06 PM

#

Only reason I am even saying this is because I have only started to delve into networking recently and I was one of the plebs who thought.."multicast multicast multicast"

stoic meadow Nov 11, 2020, 9:06 PM

#

idk just multicast set actor transform on event tick, that's all i've been doing at it works great 👍

#

^^^lmao literally

marsh gate Nov 11, 2020, 9:07 PM

#

is there a way to get an output from the server from client?

Like calling a RPC function that returns something

steel vault Nov 11, 2020, 9:07 PM

#

Reminds me of "lightning bolt, lightning bolt, lightning bolt". But yea, I prefer the control that replicated properties offers and I try to limit my multicast to very specific things and it seems to work nicely

#

@marsh gate yes you can either replicate a property or call a Client RPC from the server

marsh gate Nov 11, 2020, 9:09 PM

#

Ah...

vale ermine Nov 11, 2020, 9:11 PM

#

Trying to figure out the best way to do cell based movement. How would this be handled? I am thinking that the server spawns the cell actors and the client uses the cell data to move its client based pawns around. The only interaction the player will have is will the cells on the ground and the server will do the rest. What issues would I run into or could avoid when replicating that many walk able cells. Say 500x500. That is a lot of actors to replicate. Maybe have a component on them that when a player is a distance away from the cell turn on replication.

limber gyro Nov 11, 2020, 9:14 PM

#

If the cells are already present in the map you dont rly need to replicate them i think

#

what exactly are you trying to achieve

vale ermine Nov 11, 2020, 9:15 PM

#

I want to use the data from the cells to fake the client

#

I was thinking about a chaining system as one cell starts to replicate it lets other know they may need to replicate soon.

limber gyro Nov 11, 2020, 9:17 PM

#

but why are u fakeing the client?

steel vault Nov 11, 2020, 9:17 PM

#

You definitely don't need to replicate cells as actors if they never move

vale ermine Nov 11, 2020, 9:17 PM

#

its a top down game so only the cells in view need to be replicated and a few out of range

steel vault Nov 11, 2020, 9:17 PM

#

That can all be handled client side. If there's no information you're sharing about those cells across clients then you can get away with simply replicating a few choice properties on the characters

limber gyro Nov 11, 2020, 9:17 PM

#

why cant you just replicate the client?

empty axle Nov 11, 2020, 9:19 PM

#

@cedar finch it is not safe to do that hit calculation client side

vale ermine Nov 11, 2020, 9:20 PM

#

The client uses the cell data to move its pawns maybe. And that data is replicated from the server. Think of the monsters and everything as data on the client and server the client is the only one that spawns fake pawns to represent the game play.

cedar finch Nov 11, 2020, 9:21 PM

#

@empty axle what do you mean? Are you talking about cheating? Because It's just a small coop game with no competitiveness.

empty axle Nov 11, 2020, 9:21 PM

#

Yes I am referring to cheating

#

Then it is fine

cedar finch Nov 11, 2020, 9:21 PM

#

So if it was a competitive shooter, then I'd do my linetraces on server?

limber gyro Nov 11, 2020, 9:22 PM

#

@vale ermine you can just replicate normaly and make a local check for the cells in use

vale ermine Nov 11, 2020, 9:22 PM

#

yea so the only hit the client would make is to the cell then the server would look at the data for that cell.

limber gyro Nov 11, 2020, 9:22 PM

#

you dont need to replicate the cells

empty axle Nov 11, 2020, 9:22 PM

#

So the method that you described should be fine

vale ermine Nov 11, 2020, 9:22 PM

#

thanks ill try that

steel vault Nov 11, 2020, 9:22 PM

#

Having the pawns know what cell they are standing on or moving to is good enough for replication at that point

#

You don't need any info about the cells themselves

vale ermine Nov 11, 2020, 9:23 PM

#

well thats the thing

empty axle Nov 11, 2020, 9:23 PM

#

@cedar finch yes and you would need to consider the fact that you need to do the traces at certain timestamp from the past

vale ermine Nov 11, 2020, 9:23 PM

#

the cells will also control what particles are played on that cell

empty axle Nov 11, 2020, 9:23 PM

#

https://developer.valvesoftware.com/wiki/Source_Multiplayer_Networking
This might be interesting for you

Source Multiplayer Networking

steel vault Nov 11, 2020, 9:24 PM

#

Then you simply spawn the cells from the server with their appropriate properties like what particle effects they have. If that never changes you don't need replication

vale ermine Nov 11, 2020, 9:24 PM

#

ok

steel vault Nov 11, 2020, 9:24 PM

#

The cell will know what things to play when you're on it

cedar finch Nov 11, 2020, 9:25 PM

#

@empty axle Ok so If I leave it where I do the traces on client, then send the hits to server, why is it that clients 'rubberband' when they shoot 8 linetraces into a horde of zombies? Is it too big of a struct being sent to the server? Too many hit actors stored in it?

#

I send "hitactor" , "hitLocation", "hitrotation", and "physical Material" in the struct

empty axle Nov 11, 2020, 9:26 PM

#

what do you mean that they rubberband? Their pawns are lagging after the shot?

cedar finch Nov 11, 2020, 9:27 PM

#

Yes so lets say a client is walking left to right and shoots into a horde of zombies, the client gets snapped back and forth like he's lagging. But only when shooting into zombies, not when shooting walls, floors, etc

steel vault Nov 11, 2020, 9:28 PM

#

@cedar finch what version of UE4 are you running

#

You might see what your network graph looks like with insights to see if it's spiking really hard for some reason

vale ermine Nov 11, 2020, 9:29 PM

#

and whats your server?

empty axle Nov 11, 2020, 9:29 PM

#

Maybe processing all of the hit results is taking to much CPU time on the server

cedar finch Nov 11, 2020, 9:30 PM

#

I'm on 4.23 I can look at net profiler to see. I'm just testing in-editor right now so maybe that's the reason. "fingers crossed"

#

https://i.gyazo.com/07fe50aeaadb7b2e57663b62b3fa0b0c.gif

#

it's hard to see in the gif but I my location gets snapped back

#

.gif's always hide the lag lol

limber gyro Nov 11, 2020, 9:32 PM

#

i can see the rubber banding

steel vault Nov 11, 2020, 9:32 PM

#

I can see it. I do know there is an issue with listen servers that hasn't been resolved so you might try it as two clients instead, but that might not be it either.

#

Can definitely try it as a standalone and also as client and see if anything changes.

cedar finch Nov 11, 2020, 9:34 PM

#

https://i.gyazo.com/4fb3675619c4d3e06a9543b0c37c1f05.png

empty axle Nov 11, 2020, 9:34 PM

#

Do also cpu profiling, because if you spike on the server that would cause the same effect

cedar finch Nov 11, 2020, 9:34 PM

#

There definitely is a spike in net profiler

steel vault Nov 11, 2020, 9:34 PM

#

Ooof

#

Are you sending info on tick?

cedar finch Nov 11, 2020, 9:34 PM

#

No

steel vault Nov 11, 2020, 9:36 PM

#

If I'm not mistaken you could simplify your struct quite a bit by instead of sending actual actors and materials to simple enums that the server can break back down into their appropriate objects. Like an identifier for the actor and an enum for the phys material.

#

If you can simplify your struct even for now to see if it helps, that might be a solution

#

Try only sending the location and rotation and see if it rubber bands

empty axle Nov 11, 2020, 9:37 PM

#

Sending actor pointer is IIRC like sending integer so it won't help

terse geode Nov 11, 2020, 9:38 PM

#

Hey Guys, ran into a problem today. Basically have a dedicated server, but whilst getting access via windows client works fine, the mac client does not refuses the connection, saying that the version is wrong and you should update your build.
Both running 4.25.4, windows one is from source though, could that be it?

cedar finch Nov 11, 2020, 9:39 PM

#

@empty axle I don't really know how to read the cpu profiler. I have it pulled up

#

https://i.gyazo.com/f57a4bb08f69b9d36db7383f16123f2c.png

#

I see a spike which is probably where I shot

empty axle Nov 11, 2020, 9:40 PM

#

Might be

#

Click on it and check out what is happening in the game thread

#

Is it client profile or server profile btw? Because you need server profile

cedar finch Nov 11, 2020, 9:42 PM

#

I typed the command in on the server, the began shooting and playin on the client, then ended the command on the server. https://i.gyazo.com/ca9ef61638460338792967c71be70fb9.png

empty axle Nov 11, 2020, 9:43 PM

#

Oh yeah. 80ms is really a lot

#

You need to unfold it and check it out further to know exactly what caused that

cedar finch Nov 11, 2020, 9:44 PM

#

https://i.gyazo.com/b8b31a2223051c97de13bffca40a9a2b.png

#

not really sure what this means lol

#

I'm running another test to see what happens in the profiler

empty axle Nov 11, 2020, 9:46 PM

#

Garbage collector, that is probably not related to the shooting and the reachability analysis is not done in shipping so no worry

cedar finch Nov 11, 2020, 9:48 PM

#

Ok so I did a really quick test this time where I started the profile, shot a few times, lagged really bad, then ended the profile. It looks ok on the game thread https://i.gyazo.com/906aa5f4c2574b82c009b39962c7b783.png

#

pretty solid line all the way across

#

https://i.gyazo.com/bf3ae0c390fdcf88334d5b3614509215.png

#

So it's gotta be network related right?

limber gyro Nov 11, 2020, 9:51 PM

#

comment random parts of the code to see if any part fixes it

cedar finch Nov 11, 2020, 9:52 PM

#

You can see each shot spike here. @limber gyro I tried that. I removed impact fx, dismemberment, etc. Basically everything accept damage, and it still rubberbanded and lagged.

steel vault Nov 11, 2020, 9:53 PM

#

If you want to know if it's network related, get rid of your server RPC

limber gyro Nov 11, 2020, 9:53 PM

#

looks like u didnt try the dmg then lol

cedar finch Nov 11, 2020, 9:56 PM

#

Ok so I commented out everything so all I do is send the struct to server and it still lagged. So I tried not sending the struct to server and it didn't lag, But then I don't have damage, fx, etc. lol So it's clogging up the network with a fat struct being sent to the server I believe

empty axle Nov 11, 2020, 9:56 PM

#

You could use quantized hit location and rotation if you are not using right now or send just location and direction of the shot and do the tracing on the server

steel vault Nov 11, 2020, 9:57 PM

#

Yea, like I was saying earlier, you should try simplifying your struct and see if it takes away from the spike

#

If it does, then you have your answer

#

Just for simplicity's sake send the location and rotation and nothing else, those shouldn't clog things up. If it does, then I believe you're somehow calling too many RPCs

cedar finch Nov 11, 2020, 9:59 PM

#

I thought I had it simple lol. My enum has 6 values. So I'll do what you guys said and see if I can remove some and figure out which one is causing this

#

I only use the hit location and rotation to spawn particle fx on hit actors, same with physical material

steel vault Nov 11, 2020, 10:00 PM

#

Yea start with a small struct and increase it to find out what the bottleneck is. Also check to make sure you aren't spamming the call

cedar finch Nov 11, 2020, 10:01 PM

#

It only gets called once per weapon fire. So everytime you pull the trigger

empty axle Nov 11, 2020, 10:01 PM

#

That is okay. You can't call less for a shooter

cedar finch Nov 11, 2020, 10:22 PM

#

@empty axle Ok so good news. I took out each thing one by one and it looks like "hitBoneName" was the cause. I only have "hitActor" in my struct right now and I have no lag. 🙂 But that sucks because I used "hitBoneName" to give points and dismember zombies. 😦

#

I basically got the bone hit and if it was the head bone, leg bone, arm bone, etc. I'd hide the bone and spawn some blood.

steel vault Nov 11, 2020, 10:25 PM

#

Wait sending an FName caused the spike?

cedar finch Nov 11, 2020, 10:30 PM

#

I'm not sure I follow

#

I assumed since i'm shooting 8 linetraces, each with bullet penetration. That's a ton of names all being stored. I have 24 zombies on screen at one time so it's unlikely but it could be 192 names stored if every linetrace hit every zombie. Now I've put in a check to prevent bullet penetration from going through more than 4 zombies so it wouldn't get that high but still.

winged badger Nov 11, 2020, 10:33 PM

#

convert them to something more efficient

#

then send that over

#

GameplayTags seem like a fitting solution

#

Bone.Bonename

#

sent over network as ints

#

and you can create a tag from bone and convert tag to bone easily enough

cedar finch Nov 11, 2020, 10:38 PM

#

I'll have to research GameplayTags. I haven't used them before. @dull lance That's food for thought. So if I did all the linetracing onServer wouldn't it lag a listen server when all players are shooting like crazy?

#

just linetraces that get the hits and apply damage and fx

#

So basically clients request access to fire their weapons, the server then does the linetrace, and does the damage, and plays the fx for everyone to see?

winged badger Nov 11, 2020, 10:40 PM

#

lots of players shooting like crazy

#

isn't all disadvantage

#

you can afford yourself some freedoms and small inaccuracies

#

as when 5000 bullets are flying every minute

#

doesn't matter if some of them don't end up on same spot on every client machine

#

and even if it is

cedar finch Nov 11, 2020, 10:42 PM

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So instead of sending a big packet of info inside a struct every shot from client to server, I'd be send a simple request such as a boolean "canShoot?" to the server and the server would do the rest?

winged badger Nov 11, 2020, 10:42 PM

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it only matters for the player doing the shooting/being shot at

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my firing package is the following

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Enumeration for FiringMode, boolean for FireButtonPressed, AActor* for Target (Applicable in Automatic and Targeted fire modes) and a packed FVector for weapon target in manual firing mode

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thats all

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clients do everything else themselves from that information

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they also calculate their own shots and RPC to server, co-op can afford that

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ammo is replicated

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weapon state is a state machine ran by firing package

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it never goes out of sync

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we are more 8v150-200 AI

cedar finch Nov 11, 2020, 10:45 PM

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Can I get that in layman's terms? hahahaha

winged badger Nov 11, 2020, 10:46 PM

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my clients have the same information server has to determine what happens based on player input

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and while i try to minimize any discrepancies, i also don't care if minor ones happen

cedar finch Nov 11, 2020, 10:46 PM

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Mine is a 4 player coop zombie shooter. Survive waves, kill zombies.

winged badger Nov 11, 2020, 10:46 PM

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and they run the entire firing on their own

cedar finch Nov 11, 2020, 10:47 PM

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24 on screen at a time right now

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but in a wave it gets higher per wave

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never more than 24 at a time though

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just move to player and attack

winged badger Nov 11, 2020, 10:47 PM

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let your owning client calculate its own shots

cedar finch Nov 11, 2020, 10:47 PM

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so no

winged badger Nov 11, 2020, 10:47 PM

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RPC those to server

cedar finch Nov 11, 2020, 10:48 PM

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that's what I'm doing. I to the linetrace on client, then send the hits to server

winged badger Nov 11, 2020, 10:48 PM

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because players will notice if server starts correcting health of the zombie they are shooting at upwards

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it also allows you to inflict predicted damage accurately

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for owning player

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as for simulated proxies

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use best guess, instead of replicating all the details

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your client #2 sees zombie that has its left leg shot out, client #3 sees it without the right leg

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there is no difference between those 2 scenarios