blueprint

[royal rain]

also i dont even have enough time to fix it

i need to do something simplier before i need to turn in

im thinking i want to just make a chair move away from you when it are near it and stop when it doesnt

[last abyss]

the first one is what you are doing; you are checking if your starting position's Z is less than your current position's Z, after you made your current Z go up.
the second one is what you want to do; you want to check if your current position's Z is less than your starting position's Z, because you want to decrease your current Z.

[royal rain]

i have 7 mins

and cant wrap my head around that

[last abyss]

tldr; switch the pins around and it will work

[snow harness]

Struggling with something super simple. Rotating to look at a target with a rotation rate.

Of course I could set actor rotation per look at rotation, or use a lerp to blend to that location, but I need a constant rotation rate and what I'm doing isn't working.
I can get the current rotation, but what do I add to it?
If anyone knows of any tutorials that show rotating towards a target with a set rate that would be awesome.

[tight schooner]

@snow harness https://docs.unrealengine.com/4.26/en-US/BlueprintAPI/Math/Interpolation/RInterptoConstant

[snow harness]

God tier. Thank you very much. Didn't know about that node.

[pine trellis]

does anyone know if there is a way to get the stairs to be more smooth instead of having steps?

[trim matrix]

Aren't steps within the definition of stairs? Do you mean a ramp or what?

[pine trellis]

yeah

smooth with no steps but like a ramp

[trim matrix]

so not just a single diagonal "plate" but with the sides filled i think?

i bet there are some free mesh packs with this..otherwise it should not be complicated to create such a model in i.e. blender

[woeful pelican]

Now what's going on here??

I basically want to be able to modify the velocity of my projectile after it spawns, so I need to be able to get the actual velocity rather than what it's doing here

[ivory brook]

silly question.

this is the not equal (!=) vector node.

is the green connection a tolerance?

[woeful pelican]

Yep

[ivory brook]

I truly do have a monkey brain at them moment

thank you and sorry for the trouble

[woeful pelican]

Now if only I can figure out what's happening here

Oh, this'll probably be useful

[cursive path]

I cant find tutorials teach tap and double tap and hold button for the same buttom

[woeful pelican]

Here's a basic way of doing double-tap

Oh wait I forgot to link the event to the timer lol

[cursive path]

I mean three of them with one buttom

[cursive path]

Thanks

[ivory brook]

nooo too late

[woeful pelican]

I didn't do the holding!

Your blueprint is useful

[ivory brook]

yes, monkey brain for the win

[cursive path]

Many way to do

But use one button for tap and double tap and hold i never see so far

Maybe never exist

[desert juniper]

didn't read through whole convo, but there is a regular not node

takes in a boolean, and negates it. then you can go to a branch

[ivory brook]

my screenshot is the hold function @cursive path

[woeful pelican]

My blueprint executes something on every w press, if the first w tap was under a half-second ago, then it resets after that half-second.

Shakari's blueprint loops something while 1 is held, and stops the loop when released.

[cursive path]

@ivory brook yes look good

[desert juniper]

uhh.. isn't this going to crash the game?

[woeful pelican]

(it probably would lol)

[desert juniper]

unless you can press and release the button in 1 frame maybe? 🤣

[woeful pelican]

Anyway, any vector/velocity nerds able to help me here?

[tawdry mural]

it's not necessary to connect it to while loop again when you release probably

just set var to false

[ivory brook]

that was just first guess, I'm still very new to this so I probably shouldn't have put an answer.

I saw the question and got a bit over excited to answer

[desert juniper]

maybe a repeating task/event timer would suffice

[ivory brook]

again, not really qualified to answer, but would it not need a loop to decrease the velocity until a certain speed is reached at which point, complete the loop?

[woeful pelican]

Nah nah nah that's not what I'm doing here

[desert juniper]

but yeah, generally avoid using while loops as they are blocking and will crash your game if you can't exit them within a few thousand evaluations

[ivory brook]

I'll keep that in mind

[desert juniper]

I do this all the time 🤣

[woeful pelican]

Automatic velocity works fine, what I'm trying to do is be get and set the velocity it's going (which would do nothing but then I can manipulate the velocity from there)

A raw get and set is doing weird behaviour in my eyes, trying to figure out why the vector is changing

[sudden nimbus]

also fun if you have a for loop in a pure function and then use that in a loop -- all the iterations count and its pretty confusing until you realize whats going on

(lesson: dont use foreach in pure lol)

[worthy carbon]

How to create a login/register system in ue4

[desert juniper]

@sudden nimbus Good to know! I forget what the iteration limit is. I'm going to be excited to forget about this tip, and struggle for 3 hours before finding it here again and facepalming

[sudden nimbus]

yeah i think it just counts an "iteration" as: was this node already ran during this execution frame? it doesnt understand that inner and outer loops arent related- so its easy to see 100 items in the (outer) array and think "wait this shouldnt happen"

[ivory brook]

just watched the video again, I take it the issue is the balls spawning away from the ship

/ in odd directions

[woeful pelican]

The issue is that the ball goes in weird directions once I try manually setting its velocity using its current velocity, yeah

What I'm doing is plugging this https://docs.unrealengine.com/4.26/en-US/BlueprintAPI/Utilities/Transformation/GetVelocity/
into this https://docs.unrealengine.com/4.26/en-US/BlueprintAPI/Game/Components/ProjectileMovement/SetVelocityinLocalSpace/

And it behaves not how I expect. How can I get/correct the velocity that the SetVelocity expects?

This is on an Actor with ProjectileMovement

[cursive path]

Sometime i feel so overwhelmed with this blueprint

So complicated

[sudden nimbus]

overwhelmed with blueprint itself or a specific blueprint in your project?

[cursive path]

Blueprint itself

I know the basic

But so much information

[sudden nimbus]

yeah, you just have to bite off a little chunk, learn it, use it, and rinse repeat

[cursive path]

Such as to store variable i need game instance and many other complicated stuff

I feel there is some hidden info everywhere

And many to learn

[woeful pelican]

Easy way to store something is to just drag the output node into a space on the blueprint and then select 'promote to variable'

[cursive path]

I mean the save and load

[woeful pelican]

What do you mean save and load?

[cursive path]

To save the variable you need to put copy of the variable on game instance

And when u load the game it should load from there

[woeful pelican]

Yeah, if it's done in the blueprint that's all handled for you.

DO NOT TRY TO LOAD CHANGES INTO A RUNNING GAME

best practice is to make blueprint changes while it is not simulated

Any changes made during simulation or play won't be saved anyway

Did you find a fix for this? I think I'm getting the same issue.

[ivory brook]

Yeah, I tried looking for stuff that could help, I got nothing for you @woeful pelican, sorry

for me, it is now back to finding the issue in here

[woeful pelican]

So I'm guessing the velocity is in world space, and I need to get that into local space. I'll try googling my issue

[woeful pelican]

Can't even see the node names lol

[ivory brook]

it's getting out of hand, it's the biggest thing I've worked on so far

I'll break it down though, it might help me figure it out.

sphere around player overlaps a specific mesh, set location to variable

if there are none of that specific mesh in the sphere, set the vector to 0,0,0

Trying to repurpose this.

https://forums.unrealengine.com/t/draw-predicted-movement-path-and-any-spline-trajectory/135518

[woeful pelican]

Figured out how to convert world to local lol

Anyway lemme look at your issue

[ivory brook]

it's making the splines, or at least I'm pretty sure it is, and I think is creating the meshes because the unlit warning increases if I trigger the input

but they're not showing up, which I only want ot happen to show me that it's working, and then I can try to do what I actually want XD

good to see you got your answer though

it's possibly because the mesh I'm detecting is dynamic maybe

[woeful pelican]

Yeah from that log it looks like it's aborting the attach

[ivory brook]

I thought I was just getting the location of the actor to be honest, I didn't think I was attaching it to the object

just joining these two together

theres a spline just sort of floating in fromt of my player at the moment

even if I set the location of the player as a separate variable it's not happy

hold up

I'll be right back, think I just had a eureka moment

although it was needed, it wasnt what I needed right now XD

I got frustrated and spammed the spline summon button and I got my spline mesh randomly

[trim matrix]

I can't see my "Default" in my AnimGraph, any fixes?

[sonic pine]

Hiho i can fix my problem...
I have two Blueprints MasterEQStatsComponent and Character_Stats (UI)
In the MEQSC is the calculation for the Character Attributes (Vita, Strenght and so on)
In Character_Stats are the calculation for the outputs (UI)

If i set a Print for the output (behind the function) in th MEQSC i will got the correct value but if i set a Print for the output (behind the function) in the Character_Stats i will get a 0...
Its the same function...

Without "Cast to MasterEQStatsComponent " in the Character_Stats UI i will get a lt of zeros in the UI (ingame) but i will get a lot of errors (cant read function) with the cast i will get no errors but also no values (no zeros) ...

maybe somone know where mymistake could be ???

Correct value

zero or nothing

its the same function ...

Some ideas?

pls not too mutch help xD

[maiden wadi]

@sonic pine Sounds like the object that you're trying to cast is invalid or of the incorrect type.

[sonic pine]

i have tested all kinds of objects

which kind of object could be the correct for a component...

i need a second ^^

[trim matrix]

"Play Camera Shake" <- I can't found it and im using 4.26.2 im pretty sure they changed the name of it, what is it called?

[dawn gazelle]

You normally wouldn't cast to a component unless you're somehow getting a generic reference to a component (ie. get all components by tag and then iterating over them in which case you don't know their specific component class).

[sonic pine]

At first i was creating a Reference of the Master...Component

[tawdry tinsel]

Why cant i set my parent class to actor

[sonic pine]

I was of the opinion that a reference should be completely sufficient to use the variables, but the functions were still the problem ...

[maiden wadi]

I hate blueprint terminology. It really complicates things for beginners. You haven't created a reference. You've created a pointer. Blue values are called memory pointers, and they're empty or null by default. You have to create or have an object of the correct type to fill the pointer before being able to use that pointer to call functions on the actual object.

[sonic pine]

ok that a very good explain

Do you mean the Thrid personCharacter Referenc is a pointer and the get Charcter/get Thridperson/get Player object at the Cast is to fill/ to send values, fucntions and so on to other bp´s?

I dont Think there is an object wildcard..

[smoky oyster]

Hey all.. I'm trying to create multiple Texture 2D Arrays and then store/set one of them as an ActiveSlideSet but can't seem to get this working,

[sonic pine]

@maiden wadi is there an other way?
Delet Cast to masterComponent and use in masterComponent something like Post to Character_Stats?

[dense citrus]

hey, i'm trying to make my own physics based controller, does anyone know how i can add the forward and right vector from a camera for movement?

[maiden wadi]

@sonic pineThat is another classic blueprint terminology screw up that a lot of tutorials will mess up. Casting does not get or send anything. Casting only has to do with inheritance of classes, class hierarchy. Take for instance you create a new actor class that inherits from Actor. It's a class called Fruit. Then you subclass that twice into Apple and Orange. If you create or get a pointer that is pointing at an apple or orange, it can be cast to Object, Actor, Fruit, and it's own class. But Apple cannot be cast to Orange, and Orange cannot be cast to Apple. Similarly, you cannot cast either of these two classes to Character. All casting does is takes your blue pointer, and tries to change it's type. It doesn't change what that class actually is, it does not change what the pointer is pointing to, it just changes what you have access to based on the level of the pointer.

In this same example, if I line trace and get an actor reference back. If I hit an Apple and try to cast it to Orange, I'll get a null pointer. Cause Apple cannot be an orange. But if I cast it to the Fruit class, I could have access to any variables that were defined in Fruit, like Taste, Color, etc. If I just need the actor's world location, I don't even need to cast it, just use the actor level pointer to get the fruit's location. Because GetActorLocation is defined in the Actor class.

[sonic pine]

what a fruitsalat ^^

ok so i cant cast Actors (my MasterComopoent) to a widget but in a lot of tutorials for example Inventory tutorials is the main part of settings (toggle Inventory, Create inventory Slot, prepare Inventory and open/close) outsource in an Inventory Component and the Inventory widget can use the code

Thats why i have started to create different Components to store any settings and source code in the components and not tn the Widgets, ThirdPersoneCharacter and so on

i know the Thrid personCharacter can include components about the "Add components"

[dawn gazelle]

So what you want to do then is...

1. Add the components to your actual actors (as you've pointed out with the thirdpersoncharacter above)
2. In your widget, get a reference to the actor that is relevant to the widget. So if it's the local first person, "getplayercharacter" would suffice.
3. From your "getplayercharacter" reference, do a "get component of class" and specify the class of the component you added to the character.
4. You now have a reference to the component that contains the values you want to work with in the component.

[sonic pine]

Ok do you mean if my Character have the Component included i have to Cast to character and it will work?

[dawn gazelle]

No casting is required.

So long as the character reference you have has a component of the particular class something like this will work:

Though you of course can do it through a cast:

[sonic pine]

the get component by class i have tested ok ^^

[rancid quartz]

@maiden wadi You've been helpful in the past with a number of my questions and I see you're active. Maybe you could help again?

I'm wondering if you have any experience attaching actors with Movement Components?

[maiden wadi]

Vaguely. As in attaching two different actors who both have movement components?

If so and you mean default UE4 attachment. The actor that is attached to will have movement authority in most common cases. Movement is commonly done via simply updating the local space of all children. That's why most movement components use a root component for movement and ignore all others. Root moves, then the first thing attached to the root, then the first thing attached to that, and so on. When that branch ends it should return back to the root and start on the second thing attached to the root. The same applies for actors attached to other actors. To the movement system, they're just another tree of components to update when the main root moves.

[sonic pine]

Thank you very mutch!!! Its working xD
Which beer do you like? 😉

[rancid quartz]

Okay, that all makes sense and may explain the behaviour I've observed in my experiments.

To elaborate, I'd like an actor (the black square) to move across a fixed-camera scene and spawn an actor on each of its sides. These actors (the bolts) will fly outwards and away from the original actor but continue to rotate with it, face it, and move along with it.

I had thought attachment might be the best route to go but maybe not ?

Grateful for your thoughts. Cheers.

[maiden wadi]

Depends on how you want them to act. If you want them to be fluid, attachment will mess that up. You'd be better off just giving them a target and some follow logic to do on tick. If you're looking for more of something like a basic buff effect from most games where an effect plays around something, and it'l just rotate when that character rotates but still play it's local space effects, then attachment will work fine.

[sonic pine]

@maiden wadi also a big thank you to you for the explanations. I will keep that in mind!

[golden raptor]

why does attachment mess with fluidity? I've heard a few people say that before

[remote shard]

I'm going to start learning UE4, I have a little experience with scripting and programming, is it best learning C++ or to start with blueprint and later learn C++?

[dense citrus]

gonna try one more time heh, does anyone know how to get this\

[maiden wadi]

@golden raptorMy earlier point explains it a bit more, but in short, when something is attached to something else, the main root that is not attached to something else is what updates all component's locations. when it moves, every single thing attached to it or that is attached to something eventually attached to it will update their world space locations to keep their local space positions.

@remote shard You'll get a lot of conflicting answers on that. Me personally I found learning the environment a lot easier from the safety of Blueprint. Once you have a basic understanding of the Engine's general flow, it's very easy to translate a lot of that into C++ and start learning that as well.

[remote shard]

Thank you

I just want to make simple games to play with some friends

And if I like the engine maybe put some time to learn C++

[rancid quartz]

I guess what bothers me is that on attachment, it looks like it's all a little off because of the movement components. Without attachment though, keeping the projectiles following the spawner, while also orbiting and facing it seems difficult. 🙁

[golden raptor]

@maiden wadi is there anything wrong with doing it like that? I could see how setting it up a certain way could be useful.. is it just more resource intensive or something?

[maiden wadi]

I don't really think either way is wrong really. Attachment is likely easier for a lot of people who aren't willing to get into the vector math. But in the end it's more of a design decision than anything else.

[rancid quartz]

And everything you're describing applies equally to movement components and SetActorLocation calls?

Because my next experiment would be to see if I have better luck with SetActorLocation on a timer as opposed to Projectile Movement Component.

[maiden wadi]

So in short, you just want them to go out from the square and then circle, or expand outward to a point as they're circling, or?

The main quesiton would be, if square moves towards one of these, should the bolt stay at the same perfect distance, or have a more fluid like floating look where the bolt will be a little closer to square for a moment and then further away?

[rancid quartz]

No interpolation if that's what you mean. It's meant to be a hard, constant attachment. When the square moves, the bolts move. When it rotates, they rotate with it, always facing it and staying in the same alignment.

Finally, in addition to the square's movement, the bolts fly continuously outwards away from the centre of the square.

But what I've noticed is on attachment after spawning, the alignment looks a little off which has made me suspicious of the relationship between movement components and attachment.

[winter burrow]

Hey there, watched a few tutorials on making floating hp bars for enemies but sadly got all mixed up. Ended up with hp bars being shared across all the enemies in the scene. What I have is a stats component with health on each enemy and I'd like to for each enemy to have its own hp bar. The tutorial had me setting a reference to the enemy on the widget itself while another tutorial shows setting a reference to the widget on the enemyBP. Can anyone maybe point me in the right direction for how to correctly reference and link these things up?

[maiden wadi]

I would probably ditch any movement components in the bolts and just do pure attachment then. Doesn't need anything more than one spinning component I don't think. Bolts can be placed in the spinning component's local space, and adjusted outwards from there, and that component itself can just spin on tick.

[rancid quartz]

And I'd just need a little vector math to feed into SetActorLocation on the bolts to move them outwards?

[golden raptor]

you could just face them outwards

point the red arrow towards where they are going

and just move them forward over time

and your main object will spin, causing them to arc around

[rancid quartz]

But the main object moves as well, so I'd need to add its movement in there as well to keep it all in alignment.

[golden raptor]

as long as your sub objects are children of that, you don't even need to worry about them when it comes to that

their only job is to move forward, your main object handles the root location and rotation

that's what you're going for right?

[rancid quartz]

Is the sphere rotating?

[golden raptor]

yeah

[rancid quartz]

And the cubes are moving away from the sphere over time?

[golden raptor]

yeah think of them moving outwards on a spring arm, then you twist the main object and they all twist with it

[rancid quartz]

Give.

🍽

Please. 😁

[golden raptor]

give the blueprint code?

[rancid quartz]

May I see?

[golden raptor]

it's a huge mess.. let me clean it up a bit

[rancid quartz]

Looks perfect.

I'd be very grateful.

Cool pawn by the way. 👌🏻

[maiden wadi]

I miss gameplay programming so much. 😄

[golden raptor]

first move the main object

[rancid quartz]

I assume that's because you're on Discord full-time Authaer? 😛

[rancid quartz]

Aha! I knew something was up with GetForwardVector. I was trying all morning to make it work and it was all wrong. I'm not crazy. Thank you.

[golden raptor]

same thing on the other cube

the green lines are just the delta time from the event tick

[maiden wadi]

Nah. I stare at widgets all day long now. UI Programming can be fun, but not nearly as much as common gameplay programming.

[golden raptor]

there's cleaner ways to do it too.. like you could loop through each cube instead since they are all moving according to their own forward vectors

prob don't need interps on most of that too

[rancid quartz]

Yeah, looping I can handle. It was mostly GetForwardVector that was screwing up the works.

I'd love an explanation as to why GetForwardVector doesn't work in this case. But dinner's on the table and the wife is calling! Cheers and thank you both! 👋

[golden raptor]

imagine spinning in a circle while standing and moving forward a tiny fraction of an inch on each increment that you rotate

you're not gonna get anywhere

you're doin a nascar

[finite maple]

Does anyone know how to add a Widget Blueprint to a Camera's view?

[golden raptor]

add a node called create widget, then choose your widget from the class dropdown, then add a node called add to viewport, the target of that is the return value of the create widget node

on your character

or the actor with the camera

[smoky oyster]

No love?

Hey all.. I'm trying to create multiple Texture 2D Arrays and then store/set one of them as an ActiveSlideSet but can't seem to get this working,

[strange dune]

Ok, quick question... I have a function in a blueprint that determines the position of a character... When a boolean value changes is there a way to cause an effect in a different blueprint?

[dawn gazelle]

You can easily use a select node and store which array to access as an integer (or perhaps enumerator or boolean) to switch between them.

If you want to use your "Active Slide Set" variable, then it needs to be set up as an array type variable, right now it looks like just a standard single reference.

[golden raptor]

how is the boolean changing value? can you just set up what you're trying to do at the place it's getting set?

[candid blade]

hey, i've been looking for a good tutorial explaining how to create an inventory system. unfortunately, every single tutorial on youtube or anywhere else really doesn't go through the information that much and simply suggests i copy whatever theyre making without any explanations. I'm really trying to create the most simple system and I have no idea where to look or what to learn, I was wondering if anyone has any suggestions and what I should look into?

[golden raptor]

https://www.youtube.com/watch?v=I-Rdveo7QhY
this guy was pretty good imo, it's very fast paced, but he does explain what everything is for

that was my first time doing UI stuff in unreal and I feel like I learned a lot about that part too

[onyx token]

@burnt canyon thanks again for giving me the tip to do all the data restructuring inside the third person character - i finally got item stacking to work

[atomic wing]

How could I make a vehicle blue print where you have to press Q (To move left) E(To move right) and if you combine those you move forward? (im making a sledding type game)

[golden raptor]

maybe thruster components on the sides of your sled

[atomic wing]

Wait thats actually kinda smart thank you

[proper vale]

Hi guys!
Is anybody know Is it possible to upload picture/scheme/plan of the room and after that get a 3D walls in runtime?

[golden raptor]

a csv file might be a good way to do it.. think of your grid as able to be walls and rooms and you can do stuff like 1, 0, 0, 0, 1 to have 3 spaces in a row

then you translate your data into the right pieces.. you'd need to make walls for each type like elbows and straights and stuff with that route I think

idk, you might be able to do it with modular pieces too

[candid blade]

@golden raptor looks like thats what Ill be going with. hopefully I can make it work the way I want it to, thanks for the suggestion

[golden raptor]

I guess it's all modular, but using single walls I mean

[proper vale]

It's great idea!

[golden raptor]

yeah I'm sure you could work it out with single wall pieces.. it might be weird to think of, but it'd be like this kinda?

[proper vale]

However, there is one issue - what if walls have a angles or roundness

[pure marsh]

Can anyone point to a good tutorial on how to make NPCs that queue in line and go to a cashier?

[peak crater]

Having trouble when I move a child actor to another parent on input and the child scenes arent moving with it, any ideas?

this is my blueprint to move it

and that's the child actor's heirarchy

when my character equips the weapon everything is fine except the bullets come out of the spot where the barrel was on his back instead of following the muzzle

[winter burrow]

does anyone know what to add to allow a c++ component to be blueprintreadwrite? I keep getting a yellow error when referencing my component in bp

wasnt sure whether to ask this in cpp or bp

nvm I figured it out, needed to get component by class

[fervent bramble]

Hello! So I have this to basically add leaning to my first person character.. I'm trying to make it to where you can't lean if you are next to a wall...

I was trying to see if I could use capsule colliders to stop this, but I'm not sure how to approach it

Ignore the character model, isn't being used, lean is through camera

[quaint portal]

hello, I've got a spring arm on my camera but it doesn't respond to the rotation of the camera even though I have Enable camera rotation lag on. am I missing something?

[tawdry mural]

camera should be on the spring arm ,not otherwise 😄

[quaint portal]

yeah I have it on the spring arm. it's working with location lag

[winter burrow]

So this bp works, I just keep getting the yellow error and its a pain to have to get component by class everytime I want to change a variable. The statscomponent is made in cpp and I dont know where to add what it wants seeing as its a component and not a function/variable

[peak crater]

So it only happens when I'm opening all as clients VS a listen server

hmmm

[graceful thistle]

https://docs.unrealengine.com/4.26/en-US/Basics/Levels/Variants/Scripting/ has anyone worked with this before?

[runic nest]

Anyone have any idea how I can setup a charging attack? NOT a charged attack, I want a charging attack where the character sprints forward and if they hit someone great if not after a duration the attack ends. I am using data tables for my attack montages.

[peak crater]

ok looks like the positions are off

hmmmmmmm

[reef needle]

Hello, I'm new to blueprints and I was wondering if you can help me with a simple question
I have an input axis bound to the left mouse button. I'm trying to play a looped audio when the left mouse button is being held. The problem is that no audio plays when LMB is held and the audio plays when you release the LMB. If I understood it right, input axis sends the value "1" as an output when you hold a button. So I think it should works, but apparently it doesn't. Any idea?

[dense citrus]

anyone know how to get this to work?

[chilly jetty]

Hi there

small question

how can I stop a line trace if it hits a certain actor?

[gentle urchin]

It usually collides, which makes it hit nothing else after

[fervent bramble]

How difficult is it to have it to where if Q is held, then you can't press E and vice versa

[gentle urchin]

Just interlock them with a branch?

[fervent bramble]

I'm new to blueprint, i've no idea what that means

[surreal peak]

The MouseButton is not an Axis. Use an Action Event instead.

[surreal peak]

You could have a look at the gate node. There are lots of ways in BPs to do this

[surreal peak]

Directions are normalized vectors. If you add two together they aren't normalized anymore and you need to normalize them again.

Normalized means they have a length of 1

[dense citrus]

@surreal peak alrighty, i'll try that ty, so all i should have to do is multiply them together then normalize?

[clear osprey]

for some reason I am not able to call the current montage with an executable pin to connect with Bind event to montage ended
how to solve this bug?

[surreal peak]

Add and then norm

The current Montage node is a simple getter. It's pure and won't have an exec pin

[surreal peak]

You don't really need that

Just continue your code

One of the next nodes you'll place will have exec pins

You are going to connect the current montage to something anyway

[clear osprey]

yes and actually I need it because I need to validate if the montage is valid to know I have still an active montage playing before switching to another one or normal one or random one

[surreal peak]

Noyhing stops you from using the other node

Thr exec pin of the is Valid node is enough

[clear osprey]

so the input object should be montage on the isvalid pin from montage end event?

[surreal peak]

The point is that the two GetCurrentMontage nodes would both work

There is no requirement for the Exec Pins on the Node

You could have just plugged the other one, the green one, into the IsValid node

[clear osprey]

clear, thank you so much )

[lavish tundra]

Hey does anyone know how to make a spectator system that follows the player spectated camera movement?

[clear osprey]

you missed this one? https://www.youtube.com/watch?v=H9Y2KJl2dmI

[lavish tundra]

Never seen it no

[clear osprey]

yt has both bad and good tuts

you have to search hard work

[lavish tundra]

Like I've been searching everywhere for a spectator foundation so I can base myself on it and start from there but I haven't found anything

[clear osprey]

bad tut are those specially made by master minds to make things complicated to make you feel not comfortable for ue4

but trust me ue4 is most easy to learn and use

I have created the whole pubg game in it having 90% of pubg functionality

[lavish tundra]

Uuuu nice

Yeah I'm starting with ue4 because blueprints seems easy to learn

[clear osprey]

from plane to landing and all other stuff

[clear osprey]

good luck and dont give up

[lavish tundra]

But does that guy have smth about the spectator so I can get a foundation of it?

[lavish tundra]

Ty ty I won't

[clear osprey]

yes he has done it

he will show it respawning and spectating

[lavish tundra]

Ty man I need to see it later then

[clear osprey]

Good luck

[lavish tundra]

You too on whatever you're doing

[clear osprey]

Thank you

[pseudo pelican]

Confused why this is setting the child actor class but not changing the mesh?

nvm, isnt changing the class at all

[late ravine]

cast does not fail?

[loud badge]

Hello engineers how would I get a random point in component box of a sphere collision volume which would be in the upper part of the sphere? Like inside the top half of the sphere? Any idea for the best solution here? Thanks

[twilit heath]

random unit vector * sphere radius, and abs the Z component

• sphere center loc if you need world coordinate

[last siren]

Is there a mechanism to generate warnings or errors if a blueprint is not configured correctly (e.g. out of range numbers or missing/"None" asset reference when used in some level) when go to compile or play the level?

At the moment I put some "Print Text" in the "construction script" but this only displays either in the editor level preview window or in game. And in the editor case tends to spam the screen while stuff is being worked on.

[wicked shoal]

hey people more experienced than i am. I am looking at the "drive UI with update events" documentation. but im unable to get a 'character reference'.

Do i need to make a variable in the playerBP? and if so which one? 🤔 (my player is a vehicle for full conext)

[timber plaza]

cant find this node please help

[surreal peak]

It's a setter for a Custom variable called Open.

Create the Variable and you can call Set Open

[last abyss]

if you right click on the 'as first person character' you can promote to variable, then rename that variable to that name

[wicked shoal]

oooh, thank you very much. ill give it a try!

[timber plaza]

oh i see thank you @surreal peak

[primal smelt]

I want a player rebind-able key (default SHIFT) to adjust movement speed and I'm curious if anybody knows what would be the most costly performance-wise (or if the difference would be negligible) to do either of the following (both as single fire events, not tick):

1. Create an axis mapping in project settings and get ref to axis and check if float = 1.0

2. Create an action mapping in project settings, on EventBeginPlay create key reference to action mapping and then feed that into an IsInputKeyDown check?

I suppose what I'm also asking is how does IsInputKeyDown node work? Is it also checking the axis value of the specified key?

[loud badge]

Thank you! Will try this out later today!!

[willow phoenix]

imagine you want to bend time with time dialation via a powerup. i lerp with a timeline, that ignores time dialation. works fine with one powerup. but it gets funny when i pick up more than one of these. time never lerps back to 1 (ofc, i did check what the current time dialation is.)

not sure if i should just go the easy route and say "only one pickup a time", but actually i wanted that "doubletime" and "halftime" would cancel each other out.. hmm

i used to do it with just setting +0,1 per powerup but you can not even feel that something is happening this way, so i thought timeline would be cooler to "lerp" into the effect

and run out after 5 seconds

[willow phoenix]

ok then its just a little more complicated than i thought, thanks for the tip! ima look up subsystem first 😄

[strange dune]

Ok, newbie question. I have a character blueprint with some inherited component blueprints. I'm trying to get one inherited blueprint to set a variable to TRUE or FALSE and then have the other inherited blueprint update itself when the variable changes. Is there a way to do this?

If anyone has some pointers or tips I would appreciate it. I'm currently watching this video https://www.youtube.com/watch?v=BVpy7kvz_yg&list=PLL0cLF8gjBpqRUy7r0DtVY3Fcdgq5Wk-h

[loud cipher]

Is there something like the begin play but it only happens once forever

I want to have a song play once only when the player first plays

Even if he closes the game and opens the song will never play again

[faint pasture]

@willow phoenix have a global int somewhere (Time Exponent) that is default at 0. Subtract 1 per stack of slowdown

Then set time dilation to 2^TimeExponent when you change it

[faint pasture]

GameInstance

[primal smelt]

You can cast to the parent actor and have Get Parent Actor as the object, from the cast node you should be able to pull out any variables from the parent actor. You can set these as well, so you could store a variable on the child blueprint and set the variable on the parent from there too.

[loud cipher]

Cheers mate

Where would i go from there though?

[faint pasture]

Game instance starts up at application start and exists till application closes. Play the song at Init or whatever the startup event is in GameInstance

[strange dune]

@primal smelt Thank you, I will try that.

[gentle pasture]

Could anyone tell me how to locate and adjust the movement speed of FPS character in BP?

i looked at the event graph and other tabs, canot find in FPSCharacterBP

[maiden wadi]

@gentle pastureYou're looking for the CharacterMovementComponent's settings in the character blueprint.

[gentle pasture]

yes, the Movement and Vectors have no speed conrtrols visible in Details

Oh i see, in the top left list of componenents, i found CharacterMovement, sorry... TY

[strange dune]

@primal smelt

I have this so far. I'm inside the inherited blueprint right now trying to pull in information from the parent it's attached to.

If it's a player, then I'm trying to do stuff

I don't seem to have access to the variables though that I want to change on the parent if it's the player blueprint

If it's true I want to set a character variable to true

(essentially)

[primal smelt]

Try replacing "Get Owner" with "Get Parent Actor"

@strange dune

[strange dune]

It does not appear to be on the list

Maybe something like th is?

[primal smelt]

And just to make sure, you have created an actor blueprint and attached it to your ALS_Character_BPI? Also BPI suggests that is a blueprint interface, I'm talking specifically casting to the player character

[strange dune]

I want it generic ideally so that it can effect NPCs as well as players

I'm just too newbie right now lol. I need to get a better understanding of the basics I think.

I think I was setting the parent itself instead of a variable in the parent in the last image I posted

[primal smelt]

Here is how I am using it

[strange dune]

Omg I apparently need to Re-cast when I compile something

[primal smelt]

Here, the parent is a pawn and the child is an actor - so this is probably why you're not getting Get Parent Actor node show as you're dealing with a player character.

[strange dune]

oh wait no I just recast to the wrong damn thing lol

BPI sigh

The last image I posted was to the BP not the BPI

I'll have to go read what the difference is lol

[primal smelt]

Try adding the blueprint (that will make the changes to the variables) directly into the player character's component list as I have in my screenshot. Perhaps then Get Owner will work. This will mean you'll need to attach the blueprint to any actor you want to make use of it. There will be more options if you have a class parent set up for everything that you want to make use of it. I tend to learn everything backwards so I'm not really able to give advice there I'm afraid! You'd need to be mindful of what you want each affecting actor to inherit from their parent.

[elfin inlet]

you can do the reverse too

if this component is attached to a player, you can set a reference to the player from the player bp in the component

[wicked shoal]

Am i able to get wheel (steering) angle from wheeledvehicle component? on the docs there is a 'get rotation angle' node but i seem to be unable to find it.

[cyan rapids]

Okay, so i've been trying to figure this out for ages and its really annoying me

[runic nest]

Anyone have any idea how I can setup a charging attack? NOT a charged attack, I want a charging attack where the character sprints forward and if they hit someone great if not after a duration the attack ends. I am using data tables for my attack montages.

[cyan rapids]

I've set up a box collision around the enemy so that when the player overlaps the collision, it'll restart the level. But, the collision doesn't seem to notice the player at all

nvm

fixed it hehe

[strange dune]

Woot

I got it working

Ok

Next newbie question...

If I have an event in an inherited blueprint... is there a way to act on that event in a different inherited blueprint?

It seems like I can only call an event in the blueprint that the event is in

Inherited Blueprint A:

[olive ingot]

In blueprints, how would you get the best escaping angle from multiple points (enemy positions)?

Let's say you 5 points randomly spread around you and you need to find a point to escape to, to best avoid these 5 locations. I essentially just need an angle, then I can set the point myself with a specific range.

[strange dune]

Inherited Blueprint B:

....

literally just did a copy paste and it compiled lol

[maiden wadi]

Not sure of the best way to handle that, but personally I'd project all five points onto a ring around the main point. Iterate through them to get the distances from the last/next point. Then use the largest distance's mid point as the escape direction.

[olive ingot]

Thanks I already made it work. I appreciate you looked into it ^^

[elfin inlet]

I think I created the most atrocious blueprint

I'll need some real expert help here

gonna post a BP pastebin soon

[elfin inlet]

https://blueprintue.com/blueprint/4ip2het9/

if any brave hearts want to help, i can explain it shortly

This function is supposed to do these in order:
calculate the missing resources at a given construction
start filling up the citizen's bag until the sum of members in "bag" struct is equal to "bag limit" (starting from the first member, if its not required try the second member)
call the request resources function which is inside the Depot Class

Honestly, the BP i sent feels completely wrong and i feel like im yandere dev'ing this

And I cannot imagine the mess when I would want to add a new type of resource

[stoic palm]

One message removed from a suspended account.

[elfin inlet]

insert node

[faint pasture]

@elfin inletIt might help to break things into smaller chunks. My first thoughts on how to do this are as follows.

1. Construction (I'm assuming this is a building like age of empires style) should contain structs for ResourcesNeeded, ResourcesOnSite, and ResourcesEnRoute. Hauling is finished when ResourcesOnSite >= ResourcesNeeded.
2. AI or whatever is directing your dudes calculates ResourcesNeeded - ResourcesOnSite - ResourcesEnRoute, this result (ResourcesToPickup) is the outstanding need for the building.
3. Dude goes field by field through ResourcesToPickup, pathfinds to the depot, and grabs the lesser of InventorySpace or ResourcesOnHandAtDepot, continues doing that until InventorySpace or ResourcesOnHandAtDepot are 0. He should update ResourcesEnRoute at each pickup.
4. Dude pathfinds to Construction, and calls TransferResources which removes them from his inventory and adds them to ResourcesOnSite.

[elfin inlet]

yeah, that resources en route problem popped in while i was making this spaghetti

the problem is, when i add a new type of resource, i'd need to update many graphs spread across blueprints

which is a bug fixing nightmare

i'm trying to think of a way which would enable me to use loops

thats why i was thinking about ditching struct for creating the citizen's bag and using a text/int map

then maybe i could use enum in a for each loop

reducing points of failure when i add new resources

[faint pasture]

Use a map. Enum -> AmountNeeded

that'll automagically expand as you add more resources

your resource clump struct would then just contain a map of EResourceType to Integer

in UI you'd just map EResourceType to Text and Textures and whatnot

[elfin inlet]

sounds much better

also i will eventually have to get some of these functions converted to c++ because there's gonna be a lot of citizen instances

[faint pasture]

if all resources are the same size or count as the same, you just need an int to define a storage container like citizen bag

I'd make a resource storage component, use it for everything, bag, construction, depot, everything

[elfin inlet]

i guess a text/int map will do for citizen bag

[faint pasture]

use enums

[elfin inlet]

and i'll replace everything related to resources to use loops and enum

[faint pasture]

just make an enum EResourceTypes and use that.

[elfin inlet]

oh so it would be a EResourceTypes/int pair?

[faint pasture]

The Map would be a map of EResourceTypes to Ints, like this

I just put a random enum in there but you get it

[elfin inlet]

thank you so much, i really needed a sane person review this haha

[faint pasture]

For many many citizens, I'd have a Subsystem or something on Gamemode to do the actual logic

it should just pass orders to citizens like "PathfindToHere" or "DoThisTransaction"

[strange dune]

Does anyone else keep running into the issue where the dropdown menus stop working? I have to restart unreal

[elfin inlet]

resource transactions are done from game state, but pathfinding is inside the BT for citizens

[faint pasture]

I wouldn't have the logic live on GameState, use that more as a data store

this multiplayer?

[elfin inlet]

nope

hell no

[faint pasture]

I'd read about Programming Subsystems, that'll be your endgame for this I think.

[elfin inlet]

i should look into that!

[faint pasture]

I typically prototype in a function on Gamemode then move it to the Subsystem for speed. For instance I have a global projectile system that just has projectiles as data. Firing a projectile is just getting the subsystem and calling add projectile, it takes it from there.

[elfin inlet]

what im trying to achieve is taking minimal input from the "player"

this is like a town building sim

the citizens are going to be pretty much autonomous

[faint pasture]

Yeah that's interesting, I had a similar idea for a god game like this, inspired by Rimworld.

[smoky oyster]

Thank you.. I think that will work.. gonna give it a shot now. 🙂

[faint pasture]

How many are you thinking of having?

[elfin inlet]

as long as they meet the reproduction criteria

🙂

[faint pasture]

I mean like 30 or 10,000?

[elfin inlet]

10 to 800-1000 probably

more than that would be too much i guess

i'll do tests when i can get them autonomous and decide on the map size accordingly

[faint pasture]

You'll def. want a central manager making the calls. I'd just have a citizen report when they're idle and at intervals, have the subsystem figure out orders for all idle citizens.

go here, do this, etc.

[elfin inlet]

i better read about creating a manager for this before implementing more stuff

[stoic palm]

One message removed from a suspended account.

[faint pasture]

Yeah it'll be tricky. If computers were infinitely fast then something with AI and behavior trees and GOAP would be cool, but for that scale you'll want something more akin to writing a RTS ai.

Also read about ECS, you're not gonna be able to implement a true ECS but thinking in that way (Central systems, data only on actors) would really go a long way.

I'd start with making an order system, pathfinding orders, making an array of all citizens on gamemode, and just telling all citizens to pathfind to a random spot when idle, then build out from there. The cool thing about an order system is you could manually call orders for testing, just making a citizen do things

[elfin inlet]

right now they're using a dumb BT with a selector going through tasks by order of importance and if all checks fail they just idle

there's a structuring problem here though

the logic for storing resources reside inside MoveToDepot task

[worthy carbon]

Hi! How to create a login/register system in ue4 where players can login or create an account?

[heady burrow]

I don't think you will receive help with such a general question

google some tutorials on how to do it, and if you have a specific question you can comeback here

[elfin inlet]

step 1: get a free aws EC2
step 2: create an API for registration and login (also a database for registered users)
step 3: implement your api into your unreal project (maybe using http requests)

[faint pasture]

Thtat will probably scale really badly. You'll want something like a state machine in the manager

The manager would just inspect bag free space, and give an order to pick up X at X depot

[elfin inlet]

at first each depot had its own storage, but then i changed that

[faint pasture]

Once picked up, citizen would report as idle and next update manager would give another order

[elfin inlet]

now each depot is just a gateway for the global storage

for the sake of getting the prototype done

[faint pasture]

The core of it is that the citizen has a single order they're carrying out, and can cancel it (time out? Impossible order?) or finish it and report as idle for next order.

[faint pasture]

So manager would choose closest gateway when making order.

[elfin inlet]

so i'd use this manager class instead of any kind of BT and BB

i can transfer the logic from my bt into the manager

[faint pasture]

yeah BT would make things more emergent but can scale badly and there's not much coordination.

[elfin inlet]

i guess i'd need a custom tick for the manager

i don't need it to tick every frame

[heady burrow]

Anyone knows if there is a way to subtract/add/etc a value from a variable in one node?, meaning, not having to execute set, etc. Like a set + math operation combined into one node.

[elfin inlet]

make it yourself 🙂

[royal rain]

hey i need some simple help with something, i have an object moving endlessly in my game, i want it to not move unless i press E on it. i know how to get the "use" and press E to make it work but how do i stop the object until i press E on it

[heady burrow]

you mean in C++?

[royal rain]

no

oh

sorry

[last siren]

Is that possible? I considered it before but nothing in BP lets you get/set a variable by name?

[elfin inlet]

create a new function library

but i wonder if you can pass by ref into functions

[last siren]

that would probably work, you still need the specific get node though, so get->edit instead of get->edit->set

I had tried before also to see if could find a way to basically just make a this->X -= Y node

(or +=)

[elfin inlet]

increment and decrement nodes can change the value like that

so i think its possible

[heady burrow]

I'll look into it, I'm tired of having to call set all the time

makes it too verbose when I only want to do a += value to a variable

[last siren]

Yeah, you need to pass the variable node in though still, it is a by-ref input

[heady burrow]

so instead of this, just one node

[last siren]

the increment derement are actually just blueprint functions, so can see what they do in the editor (along with the "Manipulate Float Internal" they actually use, not entirely sure why they need all that stuff)

so you certain can make a Subtract(float &ByRef, float Amount) I think, but I found no way to integrate a variable "into a node"

infact just copy paste the decrement function and make that 1.0 constant an input

I guess would work

[elfin inlet]

if its gonna be used in a single class you can just collapse it into a macro

[last siren]

hmm, actually is a macro. allthough I don't think it needed to be

I don't think Macro's can do the C thing like #define Subtract(VarName, Amount) this->VarName -= Amount though. least i couldnt find a node for "VarName"

but can see what they did just in the "StandardMacros"

[heady burrow]

whats the difference between macro and function?

[last siren]

I think macros like in C get "copied" into each place you use them, so if you had a big macro it could in theory "bloat" the program.

As such I found macros support a couple of "non-function" things like the Delay node.

They also support having multiple input and output execution pins, like say the ? Is Valid Node

[desert juniper]

#define Subtract(VarName, Amount) this->VarName -= Amount
oh hey, this seems similar to auto props in c#

[last siren]

The public float MyProp {get; private set;? Not really seeing it, you still have to call such things like a function in C/C++

You can do some magic with operator overloads to make say this->foo = 5 run some sort of "set" method (make a Foo& operator = (int x)) but it's kinda not great and you have issues like the oeprator doesn't get the this pointer you probably want

[elfin inlet]

@faint pasture sorry for the ping, i have a question about this manager we talked about. For example, right now the way my AI finds constructions is like this:
When I place a new building, it adds itself into an array of constructions inside game state (happens in building bp)
BT task doConstruction looks for constructions in that array (happens in task bp)
The building removes itself from the constructions array when it's finished (happens in building bp)

I did it like this because afaik this is better in terms of performance compared to the manager getting "all actors of class" periodically and updating the constructions array. Which way should it be?

[desert juniper]

yeah. looking at it closer, doesn't really seem to behave nearly as close as I initially thought

[elfin inlet]

@last siren

[faint pasture]

Just have the manager look at its array BuildingsUnderConstruction or whatever, no need to get all actors of class

have the construction register itself when placed

[elfin inlet]

TIL diamond pins are passed by reference

[last siren]

Yes but to have that set a field on a type, you would still need the get node?

vs

[faint pasture]

In my case, firing a bullet is like your placing a Construction. just add it to the array, and the system handles it from there

[elfin inlet]

that's what i was asking, this is better performance wise but i guess its prone to errors like when the building fails to register itself

[faint pasture]

That would be an error with your current system too. In a full game I'd have a function on the system called PlaceConstruction or whatever and have that handle it. No need for the construction actor to register itself, as it'd be registered by the thing that spawns it.

I'm not sure what your design looks like but I'd call them Buildings and let them have different states (Planned, InConstruction, Finished, Destroyed)

[elfin inlet]

so i'd move the spawner logic from my comtroller into the construction manager and call it there from my hud

[faint pasture]

that'd be another, you guessed it, enum

[elfin inlet]

and you solved my other problem, ghost buildings while you're placing them 😄

[faint pasture]

Depends on how you want to do it. Either way, when you place the Building BP you register it.

[elfin inlet]

i'm gonna spam enums everywhere...

[elfin inlet]

in c++ you could create definitions for different overloads but not sure about bp 😦

[faint pasture]

Whether you place the BP then call RegisterBuilding or call a function PlaceBuilding, it really all does the same thing

I'd prefer the latter, then you could easily make an AI do it etc

[elfin inlet]

the only inputs from the player are gonna be placing buildings, assigning jobs and probably assigning some manual tasks

[faint pasture]

Think of all of those as messages to the manager. Place building would look like
PlaceBuilding(BuildingClass, Location)
While assignign a job would look like
AssignJob(CitizenRef, EJob)

you could also just
CitizenRef->MyJob = EJob;

depending on if you want the manager to be able to confirm or step in on it

[elfin inlet]

should i make this manager its own class

or build it inside something like gamemode

[faint pasture]

I would make it a Subsystem but maybe prototype in Gamemode

[elfin inlet]

i looked into docs and i think subsystems are made in c++ only

i'd like to prototype in bp first for the sake of dev speed 😄

[faint pasture]

That's what I do, prototype in GameMode then move it into a WorldSubsystem

[elfin inlet]

well my roadmap just took a huge swing in an hour

[faint pasture]

The cool thing about subsystems is you don't have to get gamemode, cast to your gamemode, do thing, you can just globally get the subsystem and do stuff

[royal rain]

what am i doing wrong here im trying only have this if statment go trhough if i press the E key but it wont work

and yeah i know thats probably the wrong way

but ive tried hooking it up a ton of different ways and they all dont work

[royal rain]

forgot about gats

i kinda want it just open forever honestly once i press it

[maiden wadi]

Then your last screenshot should work.

[royal rain]

but it didnt idk why

yeah that last one just doesnt work

if i make it all true it does

but the E isnt making it true

and even the gate didngt work

[maiden wadi]

Then either your escaltor doesn't have input enabled, or something else has input enabled and is consuming E input.

[royal rain]

no nothing should be taking input from e

i thought we were making input for the escalator how would i enable it

@maiden wadi

i need help this is for a grade

[sacred minnow]

sorry im not good with programming, wish i could help @royal rain

[royal rain]

eyah

um

i think i found my problem

it just doesnt sense anything when i hit E

for use

idk why is it my crap keyboard bc this is a windows 10 surface pro its more of a tablet than anything

maybe i just set it up wrong can anyone help

[maiden wadi]

You need to enable input in the actor.

[royal rain]

where

[maiden wadi]

Right click in the graph and start typing Enable Input

Takes a player controller. Use GetPlayerController 0

Call it on beginplay, or overlap, or something like that.

[royal rain]

sorry ive just never heard of that before

[maiden wadi]

There's an image that sort of explains it somewhere, sec.

https://docs.unrealengine.com/4.26/Images/InteractiveExperiences/Input/InputFlow.webp

[royal rain]

i am so sorry

ty

but part of the requirements is that i have to shoot a line trace to enable it so thats my next problem ill come back if i have too much trouble

[maiden wadi]

Controller, and whatever it possesses, and I think the level blueprint all have input enabled by default in UE4. Other actors have to call Enable Input with the controller you want to enable input from.

[royal rain]

how hard will it be to get it to only toggle when i line trace

should i change it from e down to some sort of bool

idk

i need to watch the lecture but yeah

[maiden wadi]

Not hard. Make a custom event in the actor. Line trace, get hit actor, cast to your actor class, call that custom event, make that event enable input. Then you should be able to press E

[royal rain]

i mean dont i have to first set it up in the FPS BP

or can i just set it up in the BP for escalator

[maiden wadi]

You'll need both.

If this is in your escalator thing

You can line trace however you want and call it like this if the line trace hits the actor.

Argument to made for using interfaces instead of casting here for common interaction of things, but unless your professor has brought that up, I doubt they care. Casting issues are more about memory management in very large projects.

[south bane]

i made a bouncy obj blueprint https://blueprintue.com/blueprint/t4tawtoi/
but sometimes if i hit my obj at a certain angle it bounces the player several times and makes then fly into the sky, how can i stop that from happening?

[royal rain]

sorry give me a second

so should input be disabled in the actor until then

@maiden wadi how would i make it move tho

[maiden wadi]

Isn't that what your E and tick are for?

[royal rain]

idk im trying to get it so it only moves when the line trace hits it

rn it doesnt move anymore it was when i didnt involve the line trace

[maiden wadi]

Then don't bother with input. Just set the bool to true from the same line trace event call.

[royal rain]

that makes sense but it doesnt make sense that it broke one sec lemmie follow what yousay

ah crap idk how

[maiden wadi]

Do this in your actor.

Still line trace and call like this.

[royal rain]

ok

is it done correctly bc idk if its working

[maiden wadi]

Delete the EnableInput and the Gate.

[royal rain]

wait

do i need a box collsion too

i might have forgetten

but yeah still no

[maiden wadi]

Put a Printstring after IsUsed is set to true or breakpoint it if you know how to use them, make sure that's running.

[royal rain]

yah no

i know break points but print string didnt do anyhtin g

where do you think i would put the break point

i think it doesnt know what to look for when hitting it

[maiden wadi]

PrintString the hit actor from your line trace, and enable debug drawing.

[royal rain]

ok

i did this

it doesnt recongize the esclator as an object

spelling bad sorry

[maiden wadi]

Then you either need to use Complex tracing on the Line Trace node, or add some simplified collision to your mesh object.

[elfin inlet]

your branch isn't connected

[stoic palm]

One message removed from a suspended account.

[royal rain]

i k

i think i didnt really set up the collision completely to my mesh object

i just rn added a box collision but it doesnt really work i think

[south bane]

this blueprint bounces the player away from the object it hits but sometimes the player hits the object like 50 times really quickly and sends the player into outerspace. how do i stop that?

[elfin inlet]

collision boxes doesn't interact with traces afaik

[royal rain]

oh

[maiden wadi]

They do if they're set to block.

[elfin inlet]

i think there's a trick with onRep but i guess your best bet is to do a custom ticker which fires that branch periodically

[maiden wadi]

@stoic palmNot really how it works. You either have to check the value often and run something once it's true and disable the timer, or the even better way to handle things like that is to create delegates and bind them, and call that delegate after you change the value.

[royal rain]

so what should i do i feelk like im almost there but i have class in 30 mins about

[sacred minnow]

guys quick question: how do i make my trigger box to being a sequence that makes the box move and kills the player? (the BP to kill the player is ready and it works) but i cant make the box move after the player steps on the trigger box.

[maiden wadi]

Did you try enabling complex collision detection on the line trace?

[royal rain]

no how do

nvm

its the littel check box right

works now

it got dected

hell yeah

it works

[elfin inlet]

i love it that this dude is getting walked through his assignment, deadline in 30 minutes

[royal rain]

idk if the teacher wanted it to be like toggle but fuck it

[elfin inlet]

new resource deposit function looks so much better compared to the old spaghetti

[royal rain]

anyway ty so much @maiden wadi you where very nice and patient i really needed this so ty

[winter burrow]

Struggling with something I imagine is quite simple but I cant seem to find the right route of referencing.

I have a StatsComponent with health on it attached to multiple instances of enemies as well as the player. The component is made in c++ but it has blueprint readwrite variables.

What I'm trying to do is make it so that each individual enemy has their own instance of health in relation to a health bar widget I have set up. Following YT tutorials led me to a solution where all the enemies share one health bar and Im just not really sure where or how to set this up. Can anyone offer a point in the right direction?

[elfin inlet]

you can dm me if you want, i can try to help

i remember encountering a similar problem before

[winter burrow]

Only if its no bother

[sacred minnow]

question: how do i make a trigger box only trigger one time only?

[dawn gazelle]

Do Once node

[sacred minnow]

ty

[quasi frost]

I am having an issue where I am spawning a bullet using projectile movement and the bullet seems to only travel in one direction. No matter where I am facing the projectile goes to the same position. How do I make the projectile fire in a straight line instead of towards a position?

[icy dragon]

Maybe your forward vector pointing to the wrong direction?

[quasi frost]

Yeah that was it, thanks

[fleet cedar]

Would you guys recommend a cable component or joints for a dynamic chain attached to my player?

And how can I restrict their movement to a circular area around the chain? Physics or invisible wall?

[stoic magnet]

How can I get the difference between two rotator variables ?

[mental sail]

I'm having issues with a SceneCaptureComponent2D starting ON when the game initializes. I want it to start OFF, but it always starts ON, even after I set it to Auto Active false

Also, the event "On Component Activated" does not fire when game starts...

[sour urchin]

Can i ask about PostProcess and CustomDepth here?

[faint pasture]

Make a separate event for the launch. Check if bool bHasRecentlyLaunched is false. If so, do the launch, set bHasRecentlyLaunched true, short delay, set it false.

[covert arrow]

hey i was wondering if anyone can help me out

so basically i'm making a throwing prediction system that works alright already since its pretty accurate but the thing is that the endpoint actor is not rotating to face against an object if you get what i mean.

this is what i did in the blueprint what additional nodes or calculation do i have to add?

[fleet cedar]

Delta

[junior nexus]

Hey, could anyone explain how I might be able to use Apply Damage to send damage data to an Actor, even though it doesn't inherit from a Character?

Or if it would be a bad idea to do that in the first place.

[fleet cedar]

I may be wrong but I'm now using Blueprint Interfaces for this sort of thing

Plenty more experienced people here to correct me though

[junior nexus]

I'm doing this in Blueprint, I'm just trying to figure out how to use the Apply Damage and Any Damage functions in order to apply damage to an actor, but the cast keeps failing and I can't work out why.

[sudden nimbus]

slamjam is right, the builtin Apply Damage / Any Damage is slated for removal in UE5 (but it hasnt happened yet). It's very easy to just set up your own interface that does the same thing, and of course you can customize how it works to whatever you need

blueprint has interfaces

[junior nexus]

Oh I see what you mean, I didn't understand you meant you just don't use the function.\

[heavy lion]

Is it possible when using "Get All Actors of Class" to sort of disregard if none are found instead of spewing errors?

[icy dragon]

https://tenor.com/view/sweating-nervous-paranoid-gif-4974019

[sudden nimbus]

you can always patch it back in haha

[icy dragon]

Well, the problem is going to be almost complete rewrite of the entire gameplay logic if I had to make "next gen" version with UE5. The plan is to retain all the back-end gameplay stuff, and only bring in Lumen, Nanite, and World Partition.

[sudden nimbus]

you know they should just move it to a plugin

that seems to be the way things are going for other deprecated systems

[charred orbit]

hey! i have two, overlapping trigger boxes. one is a sphere, one is a box, in attempt to create a semi-circle walk area for the player. as such, i want to check when the player is overlapping both of these trigger boxes. however, the beginoverlap event only fires when the player enters the first of these two trigger boxes. so, i tried using IsOverlappingActor, tied to the trigger boxes and referencing the player, but it still only fires on the ActorBeginOverlap event for the first overlapping object. i'm assuming that this is because the event is only fired at the time of entering the first trigger, but cannot figure out how to fix this.

after googling, the only thing i keep running into is that generate overlap events needs to be enabled...which it is on both trigger boxes.

can anyone give me any advice for this?

[sudden nimbus]

Are the two triggers components on a single actor?

[charred orbit]

yes, they're components of an actor blueprint

[sudden nimbus]

yes this is why

actor begin overlap fires for each overlapped actor

it won't fire again if another component of the same actor overlaps

you can use the component overlap versions though

[charred orbit]

doesn't that require the map's blueprint though?

and wouldn't it be less reusable that way?

[sudden nimbus]

you'd have to do it from the trigger actor

but you could do it there and send a message to the actor being overlapped

I think that's probably better than putting the logic in the actor that's moving into the triggers

[charred orbit]

it's the other way around

the player character is moving into the object's triggers

[sudden nimbus]

yes that's what I thought it was

just use the Component Begin Overlap event of each of your trigger components

you could have both events go into the same flow of nodes too if you want

[charred orbit]

sure. i'll give that a try. thanks for your help

[sudden nimbus]

np

[junior nexus]

Legos and gents, do you guys have any suggestions for how I might update a health bar without using binding?

[sudden nimbus]

how dare you assume my brand of interlockable bricks designed for children. And also sure, just update it on event when the health changes

dont do it per tick though

doing it by event is more efficient than doing a bind (which is effectively "per tick")

[junior nexus]

@sudden nimbus I just mean you build me up, come on.

[crimson saddle]

does anyone know a good way to keep track of an array of mesh sections in a procedural mesh?

I am making a deck of cards and as I add or remove card meshes from the procedural mesh I'm not sure how to properly keep track of them

[sudden nimbus]

build me up buttercup

[sudden nimbus]

I just found out blueprint expressions exist

[glossy egret]

Does anyone know who to recover from this.
Assertion failed: NumNewPins == InNewPins.Num()

google search says it probably happened when i renamed a struct that had a variable strut within it with and an output pin split. and then i change the name of the variable that had a split pin.

i really dont want to roll back to yesterdays backup. and i can open any blueprint related to this struct to fix anything.

its possible that it corrupted the struct. im not sure

[sudden nimbus]

do you have c++ in your project?

like, you know, c++ classes--- and maybe perhaps the struct referenced in this blueprint is a C++ one

[glossy egret]

not anymore i dont. i pulled this section of code from my main project to set it up to sell.
i got it working and started cleaning it up. renamed some stuff, and now im here
and ive wiped it clean of irrelevant code. there shouldnt be any C++ in here at all

[sudden nimbus]

ok, just obligatory check for hotreload

[glossy egret]

?? whats that

[sudden nimbus]

oh, i guess someone else on your team wrote the c++ originally

its a very common source of blueprint corruption

but i think the theory you found makes sense if others have hit it

[glossy egret]

oh no. i was using mordentrails vr plugin. thats the only C++ in there.

[sudden nimbus]

oh no i meant c++ in your project

[glossy egret]

and the system i pulled out doesnt rely on it

[sudden nimbus]

plugins dont count

[glossy egret]

his does

because i have to compile it from scratch

[sudden nimbus]

nah thats not a factor in hotreload

ok so have you thought about just adding another field to that struct

btw heres your assertion if you are curious

[glossy egret]

it wont open anything related. it crashes. im about to try and swap it with an older version of just the struct and see it it comes back

[sudden nimbus]

yeah i think it would if you can go back to the struct that it was

this sounds like the editor wasnt able to fully save the result of the refactoring of this blueprint struct youve got

but honestly that theory from online is fair: that its a special case bug due to pin splitting

[glossy egret]

ComponentHealth-Data
i had renamed it from LimbHealth-Data, and saved. totaly fine. changed the variable names from limb... to Component... and saved and instant crash. so give me a sec. im going to replace it and see it it loads

there was some bug reports. it was a repeatable bug in 4.24

[sudden nimbus]

wait yeah you said you only renamed it, not changed the number of fields in the struct?

[glossy egret]

yeh. i renamed the struct, and no issue. then i renamed all the pins. and saved, but one pin kept crashing when i saved. and some website recommened i clear the saved folder to clear the crash, and it worked. i was able to rename the variable and save without crashing. but now the files crash when loaded.

[sudden nimbus]

you mentioned 4.24-- are you on 4.24 or 4.26

[glossy egret]

4.26

i think

i just got it to load. but theres a mile of red errors

[sudden nimbus]

screenshot?

[glossy egret]

so i replaced only the corrupt struct and it loaded. but everything is probably screwed up right now

yeh hold on a sec

[sudden nimbus]

thats fine

thats what i would expect

so now go in there and fix the problems (red pins)

save the asset with ctrl+s after each fix

[glossy egret]

oh i see. its not fine. i may need to just reload a backup.

hold on

[sudden nimbus]

well theres going to be red pins

[glossy egret]

no

[sudden nimbus]

you just need to reconnect them or otherwise fix the issue

[glossy egret]

its not that

i have a player health struct, that contaned the corrupted struct. and it was deleted

[sudden nimbus]

oh

well yeah

[glossy egret]

and its hooked up to everything. i might as well cut my loss there

[sudden nimbus]

its only a day of work, it could be worse

by the way, i can reliably crash your editor 🙂

[glossy egret]

lol

[sudden nimbus]

just make a function, add an input parameter, then use it as an island

ie, make a new "variable reference" style node for that input

[glossy egret]

bro. but ive already done like 7 full day rewrites of this codebase lol

[sudden nimbus]

now, right click the function entry node and click "convert to event"

once you do that, it will do it and it will not complain

if you click that island parameter node, it will crash

but it also wont compile

so you are forced to handle this, its a dead stop

[glossy egret]

ouch lol

[sudden nimbus]

luckily you can ctrl+A to select all nodes, and then use ctrl+mouse to unselect every other node than the broken one

once you have just that node, you can delete it

[glossy egret]

the other day i figured out how to add a wildcard variable to a function. UE4 hated that

[sudden nimbus]

how?

[glossy egret]

not sure how i did it. i was just filling out function name and doing basic set up. and i looked over and the variable i added was white.

[sudden nimbus]

were you in a macro

oh, maybe you pasted from a macro?

there are some choice bugs there too

[glossy egret]

and i was renaming at the time. so i hit enter to put in the name so i could go correct it. and it crashed. and no. im 100% certain i was in a function. because i new it didnt support it

maby

but check this

i had alot of cookie cutter functions to add.
theres only one macro in this entire system.
and like 140 functions

[sudden nimbus]

very organized

[glossy egret]

thankyou

[sudden nimbus]

yes mad props all we get here is spaghetti

documentation is a nice touch

[glossy egret]

and all of those are basic input actions from the pawn. this is a Limb Based health system and its got a ton of stuff going on.
and dont be fooled. theres plenty of Italian specialty in there. its just hidden

[sudden nimbus]

you can't avoid it in async

well, you can

reroute nodes and node placement is an art

but no islands

[glossy egret]

also thank you. i plan to sell it. and i want it to be both plug and play and modifiable. nothing is worse than buing code and seeing that you bought a mess that you need to rewrite in order to use

bro. give me a sec

speaking of rerout nodes. i have some premium stuff for you

[sudden nimbus]

oh it's BP art sharing time

[glossy egret]

i cant show closeups because i plan to sell it. but i write everything like this

and im starting to write notes on it to make it cleaner

[sudden nimbus]

fair but i doubt you are losing much value by posting parts here

[sudden nimbus]

OK, this is in event graph right?

or a function?

if the top* screenshot is a function, then this is overkill on rerouting

but on event graph its beautiful

the second one is definitely a function and thats just overkill

unless you really like the aesthetic for some reason

islands

[sudden nimbus]

no

[glossy egret]

yeh theres your spaghetti lol

and that was as clean as i could get it

[sudden nimbus]

this system is getting retired, so if you see "old" its because the whole system is old and theres a new version to replace it in C++ on the class

note there is zero reroutes here

and everything is exactly the same as if there was

[glossy egret]

math nodes dont play well with orginazation

[sudden nimbus]

do this always

[glossy egret]

oh yeh thats fairly clean

yeh

[sudden nimbus]

dont drag from "Tags" on entry

[glossy egret]

that trick

absolutly

i learned that like 3 years ago. do that with large structs also

[sudden nimbus]

do it for every input parameter

you will save a lot of rerouting time

but still sometimes you cant, like on async

[glossy egret]

because it can pull empty/defualt values

[sudden nimbus]

what do you mean?

this

is identical to

[glossy egret]

on my old simulation vr gun code. things got pretty crazy.
and ill show you. but if i get a few to many stucts in, it wouldnt pull the actual values. it would get the struct defualts. ill show you

[sudden nimbus]

well you cant do this with properties of structs that are passed in

for instance if you had an input param of "Foo" that had a structure of "Bar"

you cant just access "Foo"s Baz property using islands like this, youd have to use Promote to Local on it first

and the tricky part there is Promote to Local (local variables) is scoped to the entire function

[glossy egret]

by the way. my player code

thats a more complete peace of work from like 3 years ago

[sudden nimbus]

i love this btw

[glossy egret]

lol

[sudden nimbus]

yeah that looks nice

when you are on the event graph you cant use islands ( grr )

i also have no idea what islands are actually called

its one of those features that just is, it doesnt have a name

[glossy egret]

node graphs?

[sudden nimbus]

no i mean this

but its so key to organizing a blueprint function well

so "parameter reference" i guess?

and i think a lot of folks say "yeah no i get that rezonant, i can do this

[glossy egret]

yo resonant. do you have a mic. we are typing like machineguns lol

[sudden nimbus]

and what they miss is this

[sudden nimbus]

ehh not up for voice chatting at the moment, but definitely enjoying the conversation 😄

plus this is better for others to read

[glossy egret]

ok., true. but give me a sec. ill show you what i was talking about

i have to find it. it took me a long time to figure this out

but it really sucks if it gets you

[sudden nimbus]

honestly when you get to fairly complicated BP stuff theres a lot of gotchas

[sudden nimbus]

in terms of "oh the editor is crashing" kind of stuff

[glossy egret]

this

is was my gun-info struct

when you get 4 layers deap. it starts to break

it works sometimes and fails in some cases

[sudden nimbus]

whaaaat

[latent arch]

hey all , whats the best way if one exists to combine two maps into one single map? id like to get a "total" map of these two as well. Thanks for any help! 🙂

[sudden nimbus]

no do you perhaps think that an "edge" in blueprint means that the value is cached

because its not

[glossy egret]

edge??

[sudden nimbus]

i mean a wire

[glossy egret]

no i dont. thats a breakdown

[sudden nimbus]

because all of this should be fine, but its easy to think that (especially with reroute nodes), the value of the wire doesnt change

[glossy egret]

i have the full stucture split out for veiwing only

so i could see every variable

[sudden nimbus]

oh do you mean during debugging

that the values on the pins werent accurate?

[glossy egret]

beleive me. i didnt get this far assuming. and ive made that mistake before

[sudden nimbus]

no i think you are far on the advanced end of BP

not assuming otherwise

[glossy egret]

yeh. do you see the struct in the red box. if i pulled values from that it would work. but if i pulled them and passed them into a function it would pull raw defualt values for the stuct variables

[sudden nimbus]

that's crazy

[glossy egret]

yeh by the way that gun code does ALOT

[sudden nimbus]

not doubting it, it's just... why would there be a problem

this is setting off Spidey sense that there was another reason it wasn't working is all

[glossy egret]

so yeh. i figured after months of returning to the function that had the issue. i figured it was a UE4 issue. and i redid the struct to have less layers.

[sudden nimbus]

manually sadly

[glossy egret]

hold on a sec

[sudden nimbus]

@latent arch I wrote some blueprint lib stuff to handle this, but sadly was unable to make a wildcard macro way of doing it

[glossy egret]

ill show you the entire function and what happened

[sand shore]

structs or arrays nested that deep seems pretty tedious to get right. It'd be easy to slip up

[sudden nimbus]

that's my thought exactly

surely one could write a testcase in an empty project to demonstrate the problem as well

[glossy egret]

well i combed over it for months. and this was the fix
if i added that struct as an input and tried to run this node as written. it would fail

[sand shore]

you won't ever be able to do this btw

just the two wild cards

[sudden nimbus]

yes they don't have relation information enough to pull it off

[sand shore]

that's the thing that'll break

[glossy egret]

if i added that struct as an input and tried to run this node as written. it would fail

[sudden nimbus]

if you could name your wildcards it could work

would love to see that come to bp

[sudden nimbus]

yeah, well the value changes over time

you probably get this so don't be offended if you do, but for the sake of everyone else here, this gun info node in the front doesn't mean "capture what it's like when the function starts"

[glossy egret]

hold on

i cant type and take screenshots as fast as you type

[sudden nimbus]

why thank you ... ? /shrug

wait ive been typing on mobile until now

[glossy egret]

these 2 functions are working on almost the same timing. with current values at start of function

[sudden nimbus]

but the bottom one is a variable reference on the blueprint not a param

[glossy egret]

this should work the same. but it failed if i tried to pull variables 4 layers in

[sudden nimbus]

they would definitely not work the same

[glossy egret]

they are the same structure

[sudden nimbus]

one of them makes a copy of what it is when the function starts, the other does not

[glossy egret]

they are both gun-info

yes. and that copy fails

[sudden nimbus]

who knows, maybe theres some weird multi-depth bug in blueprint compiler that caused an issue somewhere, stranger things have happened, but legit this just sounds like too much reroute node and forgetting that the values in variables change throughout the function's life time

but if there is a bug, you could make a testcase very easily

[glossy egret]

it fails to save the bullet structure in the red box when making a copy

[sudden nimbus]

thats not relevant to what im pointing out

[glossy egret]

well that was my whole argument that i started with.

[tranquil moon]

Hey guys I have a quick UE4 question (using blueprints), keep in mind I am completely new to unreal so this may be super dumb. I want to create a classes for abilties, but these don't need to be physical actors placed in the world, just logical classes to store info. Which parent class do I choose when creating the blueprint in the editor? I tried Object but it doesn't let me use GetPlayerCharacter which is important for abilities. (sorry I know you're already in the middle of something but I figure this is probably a really easy answer for someone that isnt me)

[glossy egret]

actor components

[sudden nimbus]

i figured this was demonstrative, since it is not connected to any exec pin nodes, which means it does nothing

[glossy egret]

there like logic plugins you can add to any actor

but

you cant add and remove them on the fly

[sudden nimbus]

you are looking for Primary Assets in the Asset Manager. It allows you to make these assets that are just collections of data (usually based on a structure type)

[sand shore]

Well they're looking for the runtime aspect

but yes

(actor component backed with primary asset)

Or, GAS

but that's not so BP friendly

[glossy egret]

yeh i was about to bring up GAS

[tranquil moon]

do actor components have to be added to an actor? I was going to just have them as a variable in the player character so I can run their Use functions there

[glossy egret]

but i know nothing about it

[sudden nimbus]

yeah GAS as well, but learning curve is a thing and it may be overkill depending

also you have to have a smidge of C++

[glossy egret]

actor component is code that is permantly attached. but you can add them to ans many actors as you want to give them the same ability

[sudden nimbus]

do you mean Child Actor Component?

[glossy egret]

. so like im writting a complex health component and i can add it to anything i want to have a health system on

not child actor.

hold on a sec

[sudden nimbus]

oh you just mean components

[tranquil moon]

ohh i see what you mean guardian

so kinda like adding a script to an object in unity

[glossy egret]

yeh

[sudden nimbus]

i think if you are building your own ability system and you want to have abilities have access to World (which UObject does not), then go with Actor as the base class

[tranquil moon]

not actor component?

[sudden nimbus]

if you choose Actor Component then youll need to add the ability as a component to an actor which you can do

it may make sense

but really Actor or Actor Component is where youd want to be, because these have a world context

[glossy egret]

well if you want to add and remove on the fly, yeh Actor Component isnt the one

[sudden nimbus]

you can add and remove components on the fly if you want

[glossy egret]

really

[sudden nimbus]

sure

[glossy egret]

ok. never mind. ive only written a few of them. this health system is the most time ive spent on it

[sudden nimbus]

here is a node to add this Patrol Manager component I have at runtime on demand

[tranquil moon]

i need them to have access to things in the world but I don't want them to be spawned in the world, they are essentially just containers for a function and a few variables and the player needs to be able to activate those functions

[sudden nimbus]

consider passing a world context object into it, or possibly moving the responsibility out of it onto another actor

[glossy egret]

ok guys. well i need to get going. but it was good chatting. when i get on i have to do a hefty rewrite of my code again.
BP structs are a very love hate sorta deal

[sudden nimbus]

BP is a love hate sorta deal. good luck on getting it in the store and may you find many sales

drop a link when youve got it done

[glossy egret]

i hope so. ill send you a test copy if you want when i get it cleaned up.
theres a lack of high end health systems in the market. theres a few basic ones. and a couple of useful ones. but i have a few complex systems and some simpler systems that use less resources. it think people will like it.
so heres to hope i do well. theres not much competition there.

[junior nexus]

Speaking of love hate, I really need some help from someone who understands casting if anyone can.

I'm losing it trying to figure this thing out.

[sudden nimbus]

hit me

i have once in awhile, used casting

[tranquil moon]

can you explain a bit more what you mean by this?

[glossy egret]

casting. lol i really gotta go.
but jokes aside, i can help with casting sometime if no one is able to help you to night.
rezonant knows his stuff
casting is easy. it more of a when to use it that trips people up.

[sudden nimbus]

so blueprint is going to restrict what kinds of "global" function nodes that are available to you

[tranquil moon]

ideally the player character would contain an array of abilities, and there would be a base ability class that all abilities inherit from so the player can, for example, press 1 to activate their first ability and that could be any ability in the game. all the player character knows is that it's activating the UseAbility() in an Ability. The Abilties never need to be spawned or anything

[sudden nimbus]

it does this based on whether the calling context is a UObject that has a world reference