blueprint

[inland walrus]

Awesome, thanks for the advice! 🙂

I had a thought, would it be easier to make a box collision, always in front of the player, when the player looks towards something, that box collision would overlap the interactable actor, would this be better?

That way, lets say I want a interactable villager for the player to talk to, when they are in this collision, they are highlighted, this way it's not going to spam a highlight event and run the same event every .2 seconds

[dark drum]

Technically no.

[inland walrus]

but if I did it on a timer or on tick, it'd run the same event every .2 seconds no? where as if it was on overlap, it'd only trigger once on begin overlap and once on end overlap

[dusky meadow]

Anyone ?

[dark drum]

If its for an interaction system type of thing, it'll be negligible. This is from mine that performs two sphere traces and performs some calculations for where the start and end locations should be.

34.1 micro seconds is pretty small in the grand scheme of things. It's really not anything to be worrying about. It goes upto about 70 micro seconds if I actually hit something to enable an outline. This even checks distances if multiple actors are hit to find the closest one.

For context, just having the movement component on the character averages at around 170-190 micro seconds.

[inland walrus]

Alright got you, thanks I'll stick with the line trace

[dark drum]

In terms of time, just save the current world time (however it is you're keep track of it) and then when you load a new level, just load and apply the saved time.

[dusky meadow]

okay

[dark drum]

Yea, traces are pretty lightweight to be fair, you can have alot without too much trouble. Great for getting data to perform checks before you do more heavy stuff.

[gentle parcel]

Hello Sourcers! I need a little help with Input events. I've got two events which should disable and re-enable each other to prevent interferences between them two. I've googled for it but all I got was temporary disable/enable by an event timer but ain't what I need. Any suggestion? I've tried a few different approaches and was only messing things up. Thanks in advance.

To be more specific... when one key is pressed the other is disabled untill that key is released.

[maiden wadi]

Just always be aware of your hardware in this. PCs even lower end are usually fine with line traces. But some hardware like Switch, XB1 and PS4 can shit themselves pretty quick with physics queries.

[marsh sonnet]

Hello! I'm getting a persistent crash, and a friend of mine said it may have something to do with setting colliders in many different actors on and off via animations. I'm new to Unreal and was wondering, where do I need to be adding isvalid checks? Has anyone else had crashes related to colliders, is there a best practice for those, too?

[faint pasture]

What's the actual thing you're doing here?

What are these events and what do they do and what calls them?

Should be as simple as a single bool somewhere and each event gates by the bool or !bool

[dark drum]

Not much anyone can do without knowing what the crash message is and possibly the crash logs.

[gentle parcel]

One event is about aiming, the other is a focus event, the first used in combat and the other in interactions with the environment and the object in it.

[gentle parcel]

The one down below is the way I originally made it. The one above is the kinda implementation I'm doing... because I realized there was a conflict I didn't like.

While these are the experiments I'm doing about it.

Still dunno where that's going... I'm not sure it's gonna work but I had to try at least

[ruby cobalt]

Hi. I have a sensor detection running at event tick. I know the approximate range of the data, between 85 and 180. I could store those values and rerange from 0. to 1.
but i'm thinking: maybe I can record the range over time and store the min and max values detected? is there a good/simple way of doing this?

i have 10 sensors like this so it's worth automating the process i guess

[faint pasture]

how many ticks do you gotta keep?

or do you just care about the min and max

[ruby cobalt]

this is for mocap "fixing" on 10 figners.. i only apply the fix when the finger bends so I track distance between finger tip and hand bone

atm I manually printed the range and set the values. it works.

since it's mocap it's likely to change at every frame

min and max shouldn't be updated at every frame tho

[ruby cobalt]

hmm actually i should program a button that I press with my hand wide open to store max values.. and hand closed to store min values

[spark steppe]

didn't UE have stuff for gestures?

[wheat citrus]

Im trying to perform a linetrace by channel as an object when a function is called on it. But I cant find the linetrace function. Is it not available to uObjects? If so does anyone know why and how to get around it?

[dark drum]

uObjects don't have world context meaning they can't call anything that requires it (such as linetraces). To add world context, it requires C++.

[wheat citrus]

alright, thanks. Still confused though cause the linetrace takes in position arguments so I dont get why it'd need any context from the object given that you could just give those arguments to it.

[marsh sonnet]

Maybe I should rephrase, I’m troubleshooting this issue myself but wanted to learn what best practices are for isvalid checks—when should one use them? Ty!

[dark drum]

A trace requires knowledge of the world in which the trace is being performed in. (Where all the meshes are, collisions etc...) Also there's some timer related stuff connected to the world.

[wheat citrus]

The application is that I have multiple uObjects which represent weapons. So each weapon when told to fire should do a line trace and report if it hit anything. Is there a way you'd suggest to do it or some other kind of class to use to represent weapons?

I also have arrow components on the actor representing the weaponns which have the spatial context, but the execution of code (cooldown, firing etc.) is currently set up on the respective uObject

[dark drum]

I'll assume you want to keep it BP only. Firstly, is there a reason you aren't performing the trace from either the component or actor that you most likely have for the weapon to be visible in the world?

[dark drum]

Anywhere you're not 100% sure an object would would be valid.

[wheat citrus]

basically to run the cooldowns for multiple weapon types simultaneously I had to make each represented as a uObject as we discussed here. Now I thought I could also run the rest of each weapons code on the respective objects but ran into the issue of the line traces

[dark drum]

Where do you create the uobjects from? Some sort of manager class?

[wheat citrus]

just made a class called "Weapon" that holds my struct for weapon information and construct it

[dark drum]

So all the objects are made from the weapon class?

[wheat citrus]

yea

but the class doesnt have access to linetraces

I guess maybe I could cast to outer each time I want to make a linetrace?

[dark drum]

Whats the weapon class? Another uobject?

[wheat citrus]

yes

its a uObject constructed by an actor component

[dark drum]

So there's 3 classes? Actor Comp -> uobject -> uobject?

[wheat citrus]

no just 2

Actor Comp -> uobject

So Actor(Vehicle) -has-> Actor Comp(WeaponSystem) -constructs-> uObject(Weapon)

[dark drum]

Ah ok, so in the actor comp, create a function that mimic the linetrace function and then in the uobject, get outer, cast to actor comp and call function.

Of course the best method would be to create the base class in C++ and just give it world context. 🙂

[wheat citrus]

ok yea makes sense. Maybe its time to start looking into C++ soon, have been planning to do that anyways. But for today the cast to outer will suffice to get it working. Thanks for the help.

[dark drum]

No worries, as an FYI, this is all you need to give a uobject world context.

The getWorld is overridden.

[wheat citrus]

thanks

[snow halo]

.

Hi I have a problem 🪲 🔧 ⚙️
I have a widget component that exists in my bp
and it absolutely has to exist there because of the way it gets displayed
It gets displayed on my screen and always floats on top of a world object static mesh & actor 🪑
...
the problem is that Im trying to use those events inside of that widget, like update the loading progress via a function, change the text, and generally edit stuff inside of it overall 📩

[lunar sleet]

Are you asking why the target is incompatible?

[snow halo]

im asking how I can get a reference

or how this is usually done

[lunar sleet]

When you CreateWidget you can save that ref

But idk why the “YourText” function thing is looking for

[snow halo]

I am not creating widget

I already have it as a component

inside of specific blueprint

[lunar sleet]

Sorry, I haven’t messed around with that much. You can try #umg

[snow halo]

because I want that widget to show up on top of specific item

[snow halo]

https://www.youtube.com/watch?v=kB1_qxNUi9Q

it's kinda similar to this

but i fixed it, I'll just cast from begin play ☑️

[dark drum]

You need to get the widget from the widget component to call functions on it. You will most like need to cast to the specific type of widget as well.

[little agate]

use rider for C++, I have really bad first experience with visual studio, lol

[queen vault]

Hey does anyone know how to port to Linux? I downloaded the necessary files to port to Linux using Windows but I get this error. It works when I port to Windows but not Linux.

[kind estuary]

my actor doesnt hit collision with another actor of the same type

no matter what i do

i tried also including a box collision to see if they collide

though it collides well with a character it doesnt collide with anything else

[dawn gazelle]

You might have better luck asking in #packaging

[kind estuary]

so it seems the mesh that has the collision must be the root of the actor, is this correct?

thats so weird

why it doesnt work for the other meshes? only the root mesh?

oh though overlap works regardless....

make it make sense

[worldly sparrow]

am wondering if anyone might be able to help a noob blueprinter here. i have made simple teleport. it works. but the exit of the teleport needs to be handplaced. the project requires the exit to be placed via pcg. is that easily achievable?

[dawn gazelle]

PCG just means you're setting values when the object is generated. You can set the teleport actor location as you need, and you can also set the location of overlap box as you need.

So when the teleporter actor is spawned, you're giving it a location (it's exit point), and then you'd probably have something that has a reference as to where you want the entrance to be (the box) and set it when you spawn it.

You'd need to ensure the actor itself is moved first as the location of the box is always relative to the actor's location.

[worldly sparrow]

ok, think i follow. so yes the entry point will happen near a doorway static mesh etc. spawned by the pcg. the exit location though will not necessarily be a certain distance/direction from that entrance point. it moves independently. so how do i pass the transform info to where the exit point needs to be?

[topaz condor]

im trying to figure this out if someone can help me, pretty much its suppose to be a magnet system. the character can pull other characters and attach them to player. problem is i can pull character to me and it passes through me and to the other side because too much velocity. i can change collision response but he runs into other objects and looks buggy. any ideas? excuse the mess ive been at it for hours

[dawn gazelle]

You'd have to decide the exit point first and then pass it to the teleport actor so it can set the location of the box.

[worldly sparrow]

is ther no way to get the teleport exit location from another blueprint?

[dawn gazelle]

Sure, there's many ways to get reference to different things. There's a pin in this channel for blueprint communications.

That said, In terms of procedural generation, you probably wouldn't want your teleporter actor reaching out to get the data from somewhere else as every instance of the teleporter actor when spawned would end up doing the exact same thing unless you have additional logic for different copies of the teleporter which means you'd have to feed it some kind of data so it acts differently. This means if you had multiple teleporters in a level, they'd all be trying to retrieve the same data unless you feed it something so it acts differently, and that something may as well be the end point if you can manage it.

[worldly sparrow]

hmmm ok. so the teleporters would need to be different. the idea being you go down from the above ground world. into a basement. then get teleported into a dungeon that is spawned using massive dungeon asset from fab.

as massive dungeon is using seed and pcg it means the shape of the dungeon is not always the same, and also the location of the start is not always the same.

[worldly sparrow]

so what if instance i use open level? and jsut place the dungeon in its own level. that way it will go to player start in the new level no matter where it is?

[dawn gazelle]

It really depends on how the flow of your PCG is going to work how you want to approach it.
Like, if you're just going to generate all the floors all at once and they're going to be connected VIA teleporters, then when you spawn a teleporter at the end of a floor, you keep reference to it, then spawn the next floor and feed the previous teleporter the location it needs to go to on the next floor.

[dawn gazelle]

Well you'd have to control where your player starts if they're moving between floors by using tags or something.

[worldly sparrow]

yeah the location of spawn is now the problem to solve. thanks for your help. am heading offline

[wheat citrus]

Is the PCG asset itself a blueprint or class? If so it might have a function or variable to determine its spawn location.

Another somewhat crude method that should work: If you’re able to ensure you can wait until the dungeon has generated you can use get actors by name or get actors by class node. If the spawn is represented by an actor in the world you can find it like that and reference its location

And one final approach, if you are able to edit the pcg spawning code you can have it call an event called say "SpawnPlaced" whenever it does, that takes in the location and then when it is called it references the already existing portal and sets its exit location

[kind estuary]

this is my mesh collision options why is it telling me in game that it is WorldStatic instead of WorldDynamic?

🤨

[pallid ice]

I remember a guy found an unreal bug where the changes you did to collision channel did not go through, try reloading the asset or restarting unreal to check if it switches back to world static on its own. if it does its the bug doing this.

i think it got fixed in the lastest unreal 5 version

[kind estuary]

that fixed it

thanks @pallid ice

[unreal flint]

Hello im New... i do a youtube tutorial but one Thing is other like in the video can anyone help me 2 minits ? i think its not a big thing

[celest crown]

did you find a solution?

[lime crow]

When a player dies (single player game) is it not more performant just to use teleport instead of destroying the actor and hud and then loading it again? If using checkpoints?

[dusky cobalt]

It would matter if it happened 10 times per second at least. Spawning one actor isn't gonna affect performance unless it's very heavy logic you do after the spawn (which also can be broken into steps with a delays or timers so it's not all trying to happen at one frame).

[dark drum]

It can be but if you need to recreate the world as well, sometimes it can be easier to reload the level. 😅

If the state of the world remains the same its definitely the easier option.

[lime crow]

Ahh. That might explain why my overlaps are going a bit funny. Basically if the player overlaps a cube he ragdolls and niagra plays. If I teleport and run over that cube again the niagra never plays. But if i reload the world it works

[silver dove]

So have this enemy and it has these components. If I want to toss it up into the air when it is killed (so that it will fall back down and land on the ground), which of these components am I suppose to "AddForce" to?

[dark drum]

The root which in this case is the capsule component. Unless you're ragdolling then possibly the Mesh.

[silver dove]

cool, thnx

[dark drum]

Having said that, you might have to use 'launch character' if not ragdolling due to the character movement component.

[silver dove]

How are they different?

Should I have simulate physics set on the capsule or the mesh? Or both?

[dark drum]

If you enable physics on the skeletal mesh ('Mesh') that will allow it to ragdoll (assuming it as a physics asset). During this however, the mesh will move around inside the characters local space.

As a quick overview for ragdoll, set the movement mode on the character component to none, disable collision on the capsule component, then enable physics on the skeletal mesh. (not the skeletal mesh needs to have a physics asset)

[silver dove]

Yeah, I discovered that local space movement - I wanted to recycle an enemy obj and noticed I had to note it's original transforms and restore them in order to do so

[unreal flint]

i write PN

[flat jetty]

Hey guys! I import LYRA animation to my project and select SK_Mannequin as skeleton. But in videos, its in place. But in my preview, its not in place, walking back like its not an in place anim.. What might be doing wrong?

Also already have this settings

[lunar musk]

Anyone knows a simple left hand ik?

[flat coral]

I can only seem to find old answers online... what's the best way to print string to a text file via BP?

[dawn gazelle]

There is an engine plugin "Blueprint File Utilities" that I think will give you some nodes to perform reads and writes.

[flat coral]

I have it, it looks like it gives me everything EXCEPT read and write

[dawn gazelle]

then I think you'd need to either make your own C++ functions and expose them to blueprint or use a third party plugin. One that I've apparently tinkered with before is Blueprint FileSDK which definitely has nodes for reading and writing files.

[snow halo]

Hi i have a question, Im placing a pancake on a pan.... My question is, why are these colors changed in this way? For example look at the syrup

[sick sky]

you dont, you only set the SM here

use the set material node after it if you want to edit those

but maybe the light is doing this

[snow halo]

Set it up via a bool?

[sick sky]

no, just call "set material" on the same target

[snow halo]

But I dont just have 1 material

[sick sky]

set materials

[snow halo]

Ok

[snow halo]

there is no set materials, and these don't have Names, or do they? I need a material placeholder's name, not material name(?) All I can get here is Element 0, Element 1, Element 2, etc.

Also there's this Slot thing

oh, wait, perhaps thats the Slot Name, i think

[sick sky]

there should be a set material by index

[faint pasture]

Why does your pancake stack have that many material slots?

[snow halo]

no idea

I just imported it from someone else, I didnt make it

[faint pasture]

Whoever it was doesn't know what they were doing. Anyway, you either need to set material on every individual slot or just fix the thing so it uses one material like a sane setup would

[dark drum]

Yea, I can't see why it would need more than 3 but it could be done with a single material. Very odd setup.

You have to remember that each material slot is an extra draw call.

[snow halo]

sketchfab tends to do that, I just import all things as gltf and then it seperates everything into pieces

[snow halo]

is this ram, cpu, or gpu intensive?

[dark drum]

Gpu I think.

[lunar musk]

Easy way to make left hand ik gun?

[dark drum]

#animation the anim folk would probably be able to better answer that. Hand IK can be tricky.

[willow gate]

Hey all. I was watching a general game design vlog the other day and they talked about platforming games using "jump queuing" which from my understanding, is when the player pressed the jump button fractionally sooner than the player character has touched the ground, it still allows a jump upon landing. I have a few ideas for implementation in Unreal utilizing a bool called bJumpRecorded and a countdown that measures when a jump is recorded (pressing jump while in the air and not double-jumping) and when the player is grounded. Am I overthinking it?

[atomic hollow]

Just check the distance from the line trace channel if that distance is nearly equal to some value then make it jump

[wide imp]

this correctly displays the UI on the player that dies screen, how come when they press the button it doesn't remove the widget from their screen? i tried set visibility on click and it still doesn't work. only works if the server/client player clicks the button

[olive yarrow]

my geometry collexction seems to insist on returning to it's original location if touched after having movement added to it. Any help, please?

[wide imp]

also posted in #multiplayer , any help appreciated. ive been stuck on this for 2 days

[maiden wadi]

@atomic hollowWhy do you need a trace?

@willow gate Don't do this. Just set a float to game time when you press the jump key. And on landed check current game time vs the saved time. If CurrentGameTime-SavedTime < 0.2 or something, trigger jump again. There's no need for traces or anything complex with this.

[olive yarrow]

i tried making it an actor but yeaaah that ain't done no help

[faint pasture]

show component layout and code

[willow gate]

This is asking the lines I was thinking. Thanks

[still gust]

Anyone present?

I got a blueprint question to help iron out a kink

The good thing is its just to iron out a pretty isolated function

[smoky basalt]

whats the issue? (not sure if i can help, but ill try)

[still gust]

okay, I have a climbableledge BP that is an actor, for specific waist-high ledges, that is invisible in gameplay unless in debug

when the hitbox of the ledge is overlapped with BP_PlayerCharacter, it casts to BP_PlayerCharacter, sets two varibles, and prints a string showing it's overlapped

the problem is when I switch to BP_playercharacter

What executes in this function is the issue - the animation plays, but the playercharacter doesnt transition to the correct positions, and does not properly 'snap' to the ledge

it also doesnt land the player character in the correct beginning and final positions

i tried to account for that with the 'add vector' nodes, but no real fixes

that's everything

[smoky basalt]

are you rotating the character towards the thing youre trying to climb onto?

sounds like you have it where you overlap with the ledge, but you arent turning yourself towards it as well.

maybe you need to replace a getActorLocation with GetActorTransform somehow?

[still gust]

I didnt set any actor rotations

[still gust]

I'll try setting the actor rotation towards the CurrentLedge

Im gonna make a variable rotation for it too

[smoky basalt]

really sorry if im not much help lmao im more of a art guy than a code guy

i can manage when it comes to code, but i aint the best.

could try digging into the code used by the Advanced Locomotion System. that handles things like climbing ledges and shit. its... pretty cool actually.

[still gust]

sure

[smoky basalt]

i think Unreal has a "lookAt" node or something that lets you get the location of an object and turn another object towards it.

[worldly sparrow]

how can i get a transform from a point spawned by a pcg in one BP as an input into another bp?

[lime crow]

Just a query about ui please? When i make ui is is ok to put the logic to spawn the ui in the hud class, then the rest in the Player controller? Thanks

[elder wharf]

Yeah, your hud class acts like a UI container/manager, use it to spawn UI and bind to delegates (event dispatchers) that live somewhere. For example, the widget that holds the stamina bar, will have a function UpdateStaminaBar that takes in a Stamina float, the player will have a delegate that is fired every time the stamina changes after being set, here the hud class comes in and binds that delegate to the stamina bar ui function. This way your widgets are self-contained, and the player doesn't interact with the widget specifically, it simply executes a delegate saying that stamina has changed.

[lime crow]

Thank you. I'm seeing alot of conflicting information about using the hud. On reddit and YouTube videos I asked gpt and it says: Correct — don’t spawn the widget from the HUD class (AHUD) in Unreal Engine 5.5.

Why?

The HUD class (AHUD) is part of the older Canvas-based system (used before UMG was introduced).

It doesn’t integrate cleanly with UMG widgets or modern UI architecture.

It's often not replicated and isn’t ideal for multiplayer setups.

Epic Games themselves favor using Player Controller + UMG or CommonUI plugin for current best practices.

Instead, do this:

In your custom PlayerController → BeginPlay:

Create Widget (e.g. WBP_HUD)
→ Add to Viewport
→ Save as variable
→ Update it using exposed widget functions or bindings

That’s the most future-proof and multiplayer-friendly setup.

Want me to write out the Blueprint steps for this logic with clear variable names and nodes?

[elder wharf]

"It's often not replicated and isn’t ideal for multiplayer setups." UI in unreal engine is completely local, it's only visual.
Having your player controller create your widgets is totally fine, but in my opinion it's not scalable, and now your player controller has one more responsibility, which is managing the game UI.

You will always have the hud class, every player gets one, idk why someone won't use it, it's working perfectly fine for me, and I'm working on a large scale multiplayer project.

[lime crow]

That's super useful information and I appreciate that. So use the hud class to display the widgets and use the player controller to update lives and stuff?

[elder wharf]

the HUD creates the widgets, and updates them through binding to delegates like I explained previously in the stamina bar example

the player controller binds to input like opening the inventory, menu, etc, and tells the HUD class to do something about it

it's mostly an architecture thing, I prefer having modular logic so it's clean and easy to add new widgets and debug them

[lime crow]

Yeah i gotcha. It does get quite confusing um not gonna lie. Because I have components that go onto the player (a stamina system) which has widgets and some logic is tied into the third person Blueprint. So basically its spreading across three Blueprints and it really pickles my brain how it all works together.

[elder wharf]

yeah that's a problem, your components should only handle logic, they shouldn't hold anything UI related

[lime crow]

Navs inventory course is Component based though?

[elder wharf]

when your stamina changes in the component, you fire a delegate. The hud class in begin play accesses the component's delegate, and binds it to the stamina bar widget's function that updates it.

[elder wharf]

navs inventory course?

[lime crow]

Ahh sorry my bad. It was a udemy course. Ahh i see, so basically i need to not use that stamina Component

[elder wharf]

Noo you're not getting what I mean.

[lime crow]

And use the hud and and pc

[elder wharf]

You should use components

One for inventory, one for your stats and whatnot... What you shouldn't do is have those very components handle UI logic

I suggest you look more into the concept of delegates (or event dispatchers I think they're called in blueprints)

[lime crow]

Yeah to be fair I've kinda avoided using dispatchers because I tend to use interfaces for everything

[elder wharf]

if you don't use dispatchers your code will be very messy, they're super useful

I believe this video would be good for you https://www.youtube.com/watch?v=GBpw8ouoda0

[lime crow]

I was reading that having alot of dispatchers with ui can get messy so kinda avoided it

[elder wharf]

Event dispatchers are the blueprint version of delegates (c++), I'm not sure how they can get messy at all

The entire engine is built on delegates, without it everything will collapse

[elder wharf]

One thing you'll notice about the video is that he'll bind to events inside the widgets, the way I personally do it is bind to them inside the hud class in beginplay, right after creating the widget

but first you need to understand the event dispatchers concept, then you can go back to the example I wrote at the beginning

[lime crow]

Yeah i think I'm gonna spend a few days watching videos on dispatchers and just practicing so I can see what's what

I kinnd get what they do, there like a message for other blueprints that can listen out for them. I just haven't used them alot which I think the issue is.

[elder wharf]

Yeah it's like that. It's a way to tell other parts of the game that something happened, without knowing exactly who's listening. They are used a lot, not only with widgets

Good luck

[lime crow]

Thanks very much man. Appreciated

[dark drum]

Event dispatchers/delegates are amazing. From a BP perspective, I'm sad you can't store them in an array.

[kind estuary]

This is making me go bonkers

Something is wrong with the buttons

when i press them they give this weird recoil that i never set up anywhere

and it doesnt seem to be the bullet itself, because then i test it firing repeatedly

it seems whenever i click mouse button it does the recoil

Does anyone have a clue what could be causing this?

seems to be the collision of the bullet, but then why would it not shake on repeat

[dark drum]

Something else is using the left mouse key? You could swap the keys around to see if it still happens with the different keys.

[dark drum]

If it is the collision, set it to overlap the pawn instead of block.

[kind estuary]

💯 🫡 that was the problem

so block is not good for projectiles?

i set it to overlap and its working so well now

the tuts i watch was with block

[dark drum]

You can but you'd have to make sure it doesn't spawn inside the characters/pawns capsule. Sometimes this might result it in spawning too far from the weapon though.

[kind estuary]

i see. thanks 🫡

[latent flame]

Hello, I’m working on a small car-building game prototype.
Right now, I’m having a problem with detaching my parts. When I try to pick them up (using Physics Handle), the chassis mesh also gets grabbed, even though the Line Trace is definitely hitting the part’s blueprint.

I’m using AttachActorToActor and DetachFromActor. I read that this might be related to Weld Simulated Bodies, but if I uncheck that, the attachment no longer works.
If I disable physics on the chassis and re-enable physics on the parts when detaching, it more or less works, but it seems to create a lot of other physics bugs.

Does anyone have any advice? 🙂
(I’m a beginner in Blueprint, learning with this project)

[celest crown]

It was some time ago i used attachtoactor and linetraces, so i am not 100% sure about what im saying.
But when you use the AttachToActor, you are setting the actor (in this case the seat) as a child actor to the chassie. This means that it is "a part of" the chassie. So when you do the line trace, you actually hit the chassie too.

[latent flame]

Yeah, that’s it — the part becomes a child of the chassis. That’s why I use DetachFromActor when I want to grab a part. Since the car’s gonna be driven later, it works well for me to have the parts attached through parenting. Is there any way to grab just the part without also grabbing the chassis, but still keep the parenting setup?

[celest crown]

so you Detach before grabbing? Want to show me the setup?

[latent flame]

Right now, I grab first and then detach.
In my setup, as soon as I grab a part, if the right part overlaps the right zone, I create a preview and a possible attachment when I release the part (based on certain conditions, like if the zone is free, etc.).

Same idea for detaching — as soon as the part is grabbed by the Physics Handle, if the conditions are met, the part gets detached.

Here are the screenshots for my attach and detach functions. I’ve tried to keep things clean, but I’m learning so I hope it’s understandable.
I can also send the ones for the attach and detach condition checks if needed.

[celest crown]

Try to do it the other way then. After the linetrace has been hit, detach it and then grab. Or is it something that goes wrong when you do that?

[latent flame]

It seems to be working, thanks! It’s actually very logical.
I still need to adjust my whole system to make sure it works smoothly with the rest, but for now, it has solved my problem 👍

[celest crown]

im glad to hear that 🙂

[graceful holly]

hello hello!
I need help finding the position of clicks trought a render target
I have a render target minimap set up and i want to click on it and spawn staaf at the postion that i click
How do i do about that?

i need to click at the postion of the big cone and spawn something there

[stone field]

I think you will need to do some math to figure out the coordinates, since it's a render target I don't think there's any easy way to do it

Optimally if you know map space 0,0 is at the center of the render target for example, and if you know the bounds, you can do the math

[graceful holly]

I'm fine with the math, just wanted to know if this was a known ,already solved, problem

[lunar musk]

I'm using copy bone from virtual bone to ik_hand_l and a two bone ik to make a left hand ik, the hands follow gun but idk why i have this gap on my gun

[lament spear]

Hello everyone. I have a huge warehouse where I have attached CCTV cameras and the footage from those goes into the control room where the live footage can be seen on the TV screen.
I am using render target and scene capture 2d for the cameras right now but the problem is that they have a huge impact on the performance (I have around 12-15 CCTV cameras).
Is there a way to use the cine camera or the camera actor to work like this so that there is little affect on the performance of the game? Or any other way to optimise the scene so that it runs smoothly?

[astral flame]

Can someone please explain to me why my regen isnt working?

[lyric rapids]

im using this to make my ai randomly wander in a radius based off where the player is however the ai always seems to take similar paths and never goes upstairs in the building unless when chasing the player would anyone know why this is

[astral flame]

Nvm fixed it.

I had my event any dmg starting the wrong function.

[golden frigate]

im trying to make a blueprint which can have children which you can add mesh components to (and move them around). The problem is i would also like to link a value for health to each of these arbitrary meshes. I tried using a map which is populated in the on construct but it constantly clears and resets things as it moves around. any ideas?

think like a blueprint that i make a child of, place a couple meshes and assign a value of "health" to each mesh within the editor (not runtime)

[astral flame]

Is a event tick okay to use for a sprinting mechanic for a multiplayer game, the game just checks to see if the player is moving or no.

[maiden wadi]

🤷‍♂️ Depends. Are you going to have 6 characters or 60?

[astral flame]

16 max

I changed it to a custom event so it wont be called unless the player is using stamina.

just for that small performance improvement XD

Is a stamina system better to use, a timeline for the stamina or actual decresing it with functions?

[placid mountain]

Hello! I have one question.
I have a shared SpawnAndAttach routine in my BP_FirstPersonCharacter that dynamically adds item components (all subclasses of BP_ItemComponentMaster) to the player. One of those is BP_FlashlightItem.
The actual world pickup is a BP_FlashLight actor, which has a SpotLightComponent called FlashLightLuz. I want to toggle that spotlight on/off from inside my BP_FlashlightItem component—without touching the universal SpawnAndAttach graph or duplicating any pickup code.

What I’ve tried (in BP_FlashlightItem::BeginPlay):
GetOwner → Cast To BP_FlashLight
GetOwner → GetComponentsByClass(SpotLightComponent)
Both return None, because the component isn’t attached until after BeginPlay.
So:
Is there a reliable way to defer initialization or hook into a later event so that BP_FlashlightItem can cache a reference to FlashLightLuz, without modifying the shared SpawnAndAttach logic?
Thanks in advance!

[steady night]

dumb question but this show rorate the "spawn actor" toward the target of find lookat rotation

Right

?

[lofty rapids]

i would assume it rotates the target actor too be looking at the target of the look at rotation is it not doing that ?

[steady night]

no... its a projectile movment component

im trying to change its rotation towards the loction

got it working

[grand surge]

Got A Little Prob,

Can AnyOne Tell Me?

I Mean When I play this animation i mean from anim bp

it doesnt play

i am on gasp als

https://www.youtube.com/watch?v=RFU-FteVTuc&t=692s&ab_channel=PolygonHive

using this

when i play m4 reload anim it does,nt play for me

why

[lofty rapids]

so as far as you are trying to play an animation but it's not working ? what does that look like where your playing the animation ?

[hexed igloo]

Hi, why is this blueprint interface not working between character and widget?
I am trying to send ammo value to the widget without casting character in the widget.

Character: https://i.ibb.co/kzLFwrw/character.jpg
Interface: https://i.ibb.co/N6bXyCzJ/interface.jpg
Widget: https://i.ibb.co/Q7xv3NmJ/widget.jpg

[maiden wadi]

You're going about this entirely wrong. Starting with using interfaces to avoid casting.

Self is not your Widget. So Self cannot run the function and set text on a textblock.

Your widget should just get the character passed to it, bind a delegate from the character. You should make a setter on the character for when ammo changes and set the new value and then call that delegate that the widget is listening to which the widget will have bound to update it's own textblock.

[verbal kayak]

Timeline "tick" is tied to fps right?

[maiden wadi]

Correct. A Timeline is nothing but a component that starts and stops and broadcasts a tick function from the component.

[verbal kayak]

just horrible to find about 3 community posts that it is not.

and that you can test it really easily

[maiden wadi]

Lol?

[verbal kayak]

yes indeed Lol

[maiden wadi]

The joys of people parroting random things they think they've heard instead of simply looking at the source code and understanding it. :/

[flat coral]

Before I reinvent this wheel, is there a function to escape a string for CSV?

[hexed igloo]

Thanks for reply, I tried adding an event dispatcher but couldn't make it work. Almost all tutorials use casting to player character which makes the widget blueprint size in memory same as character.

[maiden wadi]

Which is fine. Because your widget is going to exist along side that character anyhow. There's no extra cost there. And if the sizemap is an issue, you could subclass your character, and move all assets to a child class and cast only to the parent which would then be fairly small.

Usually this is managed by widgets taking in basic contexts. An actor pointer it can pull specific components off of that house ammo counts for example. Your only linker there is mostly the component which should be next to nothing.

[dawn gazelle]

You're probably leaving them all active and at full resolution. Some optimizations would involve disabling them if no one is looking at the TV screens, reducing their resolution, scaling the resolution with player distance to the TV screens, manually having them capturing at a lower framerate and spreading out their capture over different frames so each one captures at a different time rather than them all trying to capture all at once.

[narrow sentinel]

anyone know best way of doing this ? I'm bassically trying to have it where the NPC plays an anim montage and whilst they do this the BT would be on a task

and then after Anim Montage is done the BT task will finish execute to allow things to move on

at the moment it seems thats not happening due to the BT task not allow me to say do a timer or bind a delegate etc

[flat coral]

How do you insert JUST a line-feed (LF) character in a blueprint text box? I know about Shift+Enter but that inputs both CR/LF

[maiden wadi]

You do exactly this with a PlayMontage in a BTTask. Just don't finish execute until after the montage is finished playing.

[narrow sentinel]

so i tried that but don't seem to work

I've made my own task just cause I'm doing stuff with the montage on the NPC side

but I would have though the delegate which then fires the Finish Execute would work

obvs npc calls the delegate when it's done it's montage

[maiden wadi]

Unsure what you mean here? I'm not sure this is possible if I understand correctly. You would have to somehow insert whitespace. I'd love to be wrong though, if you find anything else about this I'd love to know.

[narrow sentinel]

or whenever it calls it

[maiden wadi]

Can you show the task?

[narrow sentinel]

so fixed it, I didn't relise but I was using the unbind event not the bind event

my player character oddly seems to fall through world though after their killed which is an odd issue

[flat coral]

Comparison in notepad++. What I'm currently exporting on the left, what I need to export on the right

[maiden wadi]

What is the main difference here? It should end up looking the same when displayed, shouldn't it?

[flat coral]

The same when it's displayed in Notepad, yes. However, I've found out that Excel uses just LF as an internal newline, while it uses CR/LF as a new row.

[signal bane]

Are there any good Unreal tutorials related to UX state machines?
Of 'present this, then present this out ux, then close it and open back up the previous one'

I've tinkered together basic stuff but I feel there's gotta be a better way than how I'm doing parts of it

[exotic gazelle]

dumb question

what is that "get Hud Ref" node cause i cant find it anywhere

this is the entire screenshot that i have just in case someone asks

[snow halo]

Hi has anyone here worked with GUIDs?

The reason why im asking is because I have an interface in my actor component

This interface says "Im ready" to an item, but Im only working with one item at a time, this interface will turn ALL my items ready

One car unlocks → Every car in the parking lot flashes their lights

[faint pasture]

That's a custom node that somebody made so you would have made it if it's in your code. Probably just a pure function

[exotic gazelle]

hmm i will try to find the funtion in the documentation tysm!

[vapid sedge]

hey there!
so i converted an static mesh to a skeleton mesh, and all the lods are correct. but the auto lod is not working properly, as it selects the second LOD (which is for a further distance) even if i am really close to the mesh?

[snow halo]

This is my interface in my furnace. But this furnace exists many times, like say I have 10 furnaces, but not all of them must be ready
Dog hears "Walk?" → Every dog on the block grabs a leash

Should I use "gameplay tags"?

how do you make sure to only talk to one interface receiver?

[dawn gazelle]

You always feed in a target to the interface call and that target attempts to execute the interface if it implements it.

[faint pasture]

show how you choose WHICH FURNACES to make this call on

[snow halo]

But... I thing I realized how to fix it. ☑️
I am probably need to connect a line-trace hit actor to the interface, that somewhere along the interface-to-interface-to-interface-to-interface, it's getting lost, so I need to connect that cable all the way till the end

But I need to pass Hit Actor all the way down, i wasn't passing it properly, i'll try that to fix it

Now that I fixed that though, it still doesn't work.

[snow halo]

So this is how im doing it right now

so im actually passing the line trace down to the last node, after all this blueprint to blueprint to blueprint chaos, so the last one is finally getting the actor reference

and because my interface was failing to work

I added this on top of it

But now this still gives me an incomprehensible error

[faint pasture]

that's not incomprehensible

it was declared in parent class with a different signature

just recreate it here

since you changed the interface to pass 2 parameters instead of the original 1

[snow halo]

delete this interface & recreate it?

[faint pasture]

delete the event with the error

since that event is from the old version of the interface

[snow halo]

I refreshed it though

[faint pasture]

just do it, it'll take 2 seconds

[snow halo]

its done

oh ok, its fixed

[narrow sentinel]

Anyone know the best way after player dies where they ragdoll how to revert them to none ragdoll ?

[snow halo]

I had this problem before and I had to rework my entire blueprint setup because I didn't know what it was

[narrow sentinel]

to keep my game simple I'm move the player to a specific location after death so need the physics I enable on the player mesh to reset so they conform back to the anim BP and don't do physics anymore

[vapid sedge]

Hello, when I convert my static mesh to skeletal mesh, its facing in the wrong direction, is there any way to change it?

[warped juniper]

Just need some quick math help...
With an actor's location and the control rotation, how do you make a line trace that aims towards the player's control rotation?

[maiden wadi]

Turn control rotation into a vector. Multiply it by how far you want the trace to be and add it to their location.

[warped juniper]

@maiden wadiHow do you turn rotation to vector?

[maiden wadi]

There's a.. RotationXVector or something similar function.

[warped juniper]

Alright got it, thank you!

[hidden fossil]

So a quick question. I have the following portion of a blueprint that's configured with an XYZ of 29400.0, -1.0 and 0.0, which is supposed to move a boss enemy to a specific side of the battle zone relative to a specific attack and the battlefield radius (which I calculated based on the blocking actors which are intended to keep both you and the boss within the designated area) is about 1850.0. Unfortunately, the boss is moving way further than she is supposed to - and also way too fast - both of which combine to effectively "soft lock" the game. (Also, it's in the context of a side-scroller, so I only need to worry about the X axis which is why it's the biggest number out of all three of 'em.) Would anyone be able to advise on what I should do with either the blocking actors or the calculations so that the boss will slow the f--- down, and also stop going out of bounds? (The former objects are both set to "block all dynamic," in case it helps.)

[dawn gazelle]

The target location is a Target Relative Location which would be relative to the location of the actor itself.
The speed in this particular instance would be handled by the "over time" value which you have set to 1, and the movement would be a fairly large value to move to when set to 29400 so it would be moving pretty quick to go that distance in 1 second.

Are you sure you're not able to use something like "Move to Location or Actor" instead?

[hidden fossil]

Not 100% sure, this is an example that was set by the starter kit's developer (and second off is that the blueprint is connected to a behavior tree). However, I did find it off your suggestion so now I just need to rewrite the logic.

[nova grotto]

hey guys less of a bp problem and more of a math problem i guess how do i get the location of between 2 actors then 90 degrees from that so essentially a triangle

[faint pasture]

in what plane? There is a ring of these locations.

[nova grotto]

for what i need to do i need for it to be from any of the x and y position that my actor could be in with the other actor

[faint pasture]

wat

are you saying you need it to be at a constant Z height?

[nova grotto]

i dont think it has to be now that im thinking about it

[nova grotto]

its a camera that sits between the 2 actors but is a certain distance to the side of them think tekken camera

[faint pasture]

oh ok that's easy

Midpoint = (LocationA + LocationB) / 2
CameraLocation = Midpoint + Offset

Offset will be in x or y depending on how you're doing it

[nova grotto]

this is what i have sso far but the cameras dead in the middle of them

[faint pasture]

add an offset like 0,500,0 or whatever

btw you can do math on vectors, no need to break it up

[nova grotto]

local offset?

[nova grotto]

im awful at vectors lmao

[faint pasture]

type in whatever offset you want for the camera to have

the set camera location = the result of that final add

literally that easy

do that on tick and you're done

Now there's more to a fighter camera then that as you'd want to pull in and out as the distance between the fighters changes but get this working first

[nova grotto]

i think i messed something up in my math

wait i got it add local offset was perfect thnank you

[rigid bay]

Hi, I need some help. I'm trying to make an rng dungeon system, and I have an idea of how I want it to work (see attached image), but I can't seem to figure out how to begin implementing it/setting it up. I was thinking about having each room be it's own actor, then having the room that acts as the initial room spawn the additional rooms, with a set limit based on which floor you're on. I was thinking about using a struct or enum to hold the rooms, then letting the "master" room choose from the struct/enum, but I can't seem to figure out how to do it. I don't have much experience with structs/enums, and that's probably what's holding me back. If you know how to help, or if you have a better method, please let me know.

[faint pasture]

have a RoomSpawner somewhere

Have it do the logic

For the first draft, have a max room count, and then iteratively place a random room that can fit at each unoccupied exit until you have maxrooms

you might paint yourself into a corner, then you can just restart or whatever.

All you'll need is a function to cook up where a room would be to match up exits and also a function to check that it fits (isn't intersecting previous rooms)

[rigid bay]

I was thinking about having the initial spawn room the player spawns in be that RoomSpawner, that way all I need to do is place it in the level, then set the variables on a per level basis. I just need to figure out how to make a list/table/array/something that holds the rooms, then let that RoomSpawner choose from that something. I just don't know how to make that something. Once I figure that out, I should be able to make a system to handle where the rooms are placed.

[faint pasture]

If the initial room is special and not just a random room then sure.

[snow halo]

so based on this, why does my first branch of my behavior tree go back and forth between flee-patrol really really fast & my chicken never make any moves?

[teal nexus]

might be a silly question, but...
I have a plugin that keeps getting updated and I added some functionality there for mobile optimizations
I call a function on timer:

and the function was in the same BP, which is part of the plugin
I split off that function and put it into my BP Function Library, so that when I update plugin next time, I don't have to copy/paste function from previous project to the current one.
I am not sure how a function is called from the function library, for this specific case

I guess what I need is to feed some variables from plugin's BP into my function that is in the library and that is being called on timer

[faint pasture]

Are you sure t he AI MoveTo isn't failing instantly?

[snow halo]

Im not sure which one but I think either the patrol or flee task fails

fails instantly

[faint pasture]

Check that your AIMoveTo is not failing instantly

put a breakpoint on OnFailed and see if it fires

oh wait

your acceptance radius is 500

you succeed instantly

[snow halo]

isn';t that big enough?>

[faint pasture]

"Run to a random spot within 500 units, succeed if you're within 500 units"

It's too big, they are within the acceptance radius as soon as it fires as their target pos is less than 500 units away

set it to like 100 or 50

[snow halo]

let me get this straight so if they're both the same, they will not work properly?

I still don't understand why or how

[river hill]

Hey guys, im working on making my first rts just having fun. I'm currently trying to make my unit selector, and im having trouble getting the rectangle to show up after i use the subtract nodes. i was watching a video, and i know there is an error, but i can't seem to figure this one out.

[dawn gazelle]

You're selecting a random navigable location within 500 units of the actor. If you're setting the acceptance radius to 500 on your AIMoveTo node, that means that so long as it is within 500 units of that location, you've basically reached the destination. So if you're moving within 500 units but you're accepting that its finished within 500 units, no movement is required.

[faint pasture]

If I tell you to move a mile away, and that being a mile from your target position is close enough to consider yourself finished, you obviously would be finished instantly.

You're saying "move 500 away, also 500 distance is close enough to be done"

[snow halo]

Now im doing this, so the chicken moves, stops, looks around, looks around, looks around, if it sees me, it starts to move again, then stops, looks around, looks around nervously and so on and so on..

but it rotates around itself really awkwardly

[river hill]

if anyone has an answer to this, that would be amazing lol. I'm making so much progress, but this simple rectangle is setting me back lol.

[smoky basalt]

for some reason, if i spawn in my ship pawn when the game starts, i start off in control of it instead of my character, even though i have my character set as the default.

also have my character's UI onscreen when i start the game, too.

it is kinda funny getting absolutely blasted by the main drive's exhaust though lol

hey, at least the controls for the ship still work.

[dawn gazelle]

If you have your ship placed in the level, select it and look for the auto possess option in the details and make sure it's disabled.

[smoky basalt]

im not placing it, im spawning it via the level blueprint

i did check that though, and its set to not auto-posess

the pawn blueprint class is i mean

wait never mind. figured out a way to do it.

after spawning the ship i got the player controller, and added a possess node, with a ref to my character, and that did it.

[hidden fossil]

Welp. Got another problem.

The move to location is working properly, but the lunge is supposed to be quick.

And it doesn't appear to be affected by walk speed.

Would there be any way to make her move faster during the thrust rush?

[terse spruce]

Hello, is there a simple way to find out how far along a spline something is?

[terse spruce]

simply compare distance along spline with spline length, somehow didnt see these node pop out when i was looking

quick follow up question, how expensive are spline to use and update at run time (on tick).
Would maintaining my own array of transforms and using that be significantly cheaper?

[spark steppe]

i doubt that there's a difference, but i don't have numbers

after all, i guess that the spline curve is only interpreted when you query points on it, adding new ones (or moving existing spline points) most likely costs nothing

i'm going to check the source now, because you made me curious...

[lyric rapids]

how would i make a progress bar in ui change colour as the percent gets higher

[spark steppe]

lerp two colors based on the value?!

@terse spruce ok it's a bit more involved especially if you choose to update the spline when adding the point

but after all, i think it's still nothing too intense

not going through everything now, it mostly does some sanity checks and recalculates the length

[terse spruce]

what does updating the spline do? i checked it just in case, but if it just retroactively change tangents of previous segments i dont need it

[spark steppe]

changing tangents can change the length tho

[lyric rapids]

ive got this sorta thing setup so the fuller my progress bar is the more red it is but how would i get it to fade between blue and red with the lerp

[spark steppe]

you can lerp Linear Colors, with another node

[terse spruce]

yes but since i check every tick, so i think it's ok. i dont think i need to smoothing

[lyric rapids]

wdym sorry

[spark steppe]

just search "lerp color" in the contexmenu

[sand bloom]

Yeah based on the alpha you can go from one color to another

[lyric rapids]

ah thank you didnt know that was a node

[sand bloom]

yeah otherwise you'd need to it yourself and lerp each rgb value independently

[terse spruce]

need UE ai copilot for BP nodes, would be so useful

[spark steppe]

i would bet that chatgpt would have known that

it's a moron, but for stuff like that it's fine

[sand bloom]

yeah chatgpt is iffy but it did know this lol

For more in depth stuff i'm hoping for mathew wadstein to save my brain rn before i create some very possibly wrong systems lol

[terse spruce]

i did try to ask some stuff with VS copilote and it has been mostly useful, i think a proper integration by epic into UE would be really solid. Ai is good at this stuff, answers to stuff that could be googlable and documented but not always easy to find

[sand bloom]

okay I can't find anything about how multiple savegame objects at once interact so maybe I really am on the wrong path lol

[spark steppe]

no, i hope they don't

they should focus on proper documentation

[sand bloom]

so what color do you want your dragon to be.jpg

[spark steppe]

chatgpt just told me 2 hours ago about nodes and things which just don't exist...

which is frustrating sometimes

[sand bloom]

yeah chatgpt is way too iffy

[spark steppe]

a black voidwyrm with vibrant colored wings please

[cunning vapor]

I have 3 "Keys" but my for each loop is only being run once - am i doing something wrong ? bit confused ! thanks in advance

[spark steppe]

does your print string only print once?

[cunning vapor]

yes

[spark steppe]

show the whole mess code

what happens after spawn actor

[cunning vapor]

It's in a function if that helps; just the return node - thought they could work in a function; maybe best to make custom events ?

[spark steppe]

xD

yea dude..

you are returning in the first iteration...

ofc it stops

[cunning vapor]

Omg it was suuposed to break there! thanks for pointing that out; would of spent hours looking for that

[sudden swan]

Hiya, does the actual sequencing of the execution pin matter

trying to set the media player for a media texture with a blueprint

but for the media texture to set the media player it has to get the media player first

making some UMG import tools

full part of this graph

its not setting the correct media player

[sand shore]

Yes the actual sequencing of the execution pin always matters.

I don’t think anything is getting skipped here. Lemme describe what you’re doing here, and see if it still makes sense to you.

You’re getting all of your mediatexture assets, and then for each individual mediatexture, you’re loading all mediaplayer assets, and then you’re setting the mediatexture to use every single mediaplayer.

Eventually, all your mediatextures will be using whichever mediaplayer happened to be the last in the list.

[sudden swan]

yeah the asset its getting by path, is only one single media texture

[sand shore]

What about media players?

[sudden swan]

it duplicates a directory

also one item in the directory

If i prin the output of the asset request it reports te right one also

[sand shore]

Well, in that case then, the blueprint logic isnt the issue right now, but it definitely seems sketchy if you’re building a tool

[sudden swan]

haha well the wierd thing is this logic works for setting the sequence path of a IMG media source asset

this sets the img sequence path in an IMG media source uasset

and the replace node makes sure if someone uses copy as path function in windows

[sand shore]

Aight, I don’t usually work with mediaplayer so I can’t really help troubleshoot here

[sudden swan]

"Y:\WVO_XXXXX\05 References\Inside.png"

yeah its wierd that this logic works for some assets in the asset browser haha

and some dont

[sudden swan]

thanks anyways!

I guess in the one where i set the path to the img sequence, i reference one object to set something for itsself.

but the mediaplayer/mediatexture i reference 2 objects

[sand shore]

Yeah, but I do expect that it works when there are two assets total

What behavior suggests otherwise? It may not be the asset fetching that is the issue

[sudden swan]

hm im guessing the order of operations

which one to fetch first

but they need to be fetched at the same time for the last node

the Set Media Player node needs both in puts, and im fetching one after another, so i guess it forgets one somewhere? xD

[sand shore]

Get in there with the debugger or add more print statements, but it doesn’t forget one

[sudden swan]

well printed everthing notihing has a wrong name or anything.

I guess it just doesnt work

or the node is broken

I now see i dont actually need the media player i think

Cant find any info on this node xd

NOTHING online lol

[lyric rapids]

im using pawn sensing on my enemy ai to see the player but how do i check if the player leaves sight

[wide imp]

so for an inventory system, is it better to store all the classes in an array, or spawn the objects in and store all the actors?

[dire hazel]

hey guys, this is how I decide if a point is reachable by my ai

I want to get farthest point that ai can reach

actually, I can do it with this function by trying different radiuses

[dire hazel]

.

But if there is another "light way", I would want to know

[jovial steeple]

Actors are visual representations of something that you want to show existing in the game world. Therefore, in most cases, there is not a reason to spawn an actor in unless you need something to be visually represented in the game world. In many games, equipped items have visual representations spawned in. Items in your inventory do not.

[remote meteor]

use random reachable point instead

[wide imp]

so have an array of classes, and when equipping an item, spawn it in?

[jovial steeple]

This would work yes.

It could also be an array if item IDs, that correspond to a data table.

[wide imp]

well for now, i have an array of "bp weapon comp master class" could this work for spawning in the weapon?

if the array is empty, set it to the equipped weapon.

else, just add the class

[jovial steeple]

Yes, but an array of weapon comps would limit your items to only being different weapons. A inventory system may need more then just weapon comps

[wide imp]

understand, just doing this for as of now

[jovial steeple]

Then it works

[dire hazel]

yeah you are right, thats my bad, thx

[wide imp]

okay

if i wanted any item can i make it an array of classes

(for now) later will convert to structs

or item ids

[jovial steeple]

Though in your code, you are trying your best to add an item to your item array, on the remote client instead of on the server. Make sure you use a run on server function to edit the inventory to.

[wide imp]

oh ur saying add the weapon to the inventory on the server

does this run on server?

[jovial steeple]

Yea, you also have the option of using data objects to. Which are like structs but just an entire object class.

[jovial steeple]

This function gets called locally on whatever computers keyboard pressed the interact key

So if a remote client presses interact, it gets called on only his computer

If you went to the server client, pressed interact, it would get called only on the server computer

[wide imp]

ah, so i should make a function, that runs on server, and adds the item to the inventory array

[jovial steeple]

Yea

[wide imp]

does that mean i have to make the array of items, replicated?

[jovial steeple]

Yes

[wide imp]

doesnt need rep notify though right?

[jovial steeple]

No not unless you decide you need it

[wide imp]

okay let me try this out

[wide imp]

so the server spawns in the weapon, does it also set the equipped weapon?

[jovial steeple]

In the end, when you press the pickup item key on a remote client your goals are to.

• Add the items to the remote clients inventory.
• Spawn the weapon in on the remote client if needed.
• Add the item to the inventory on the server, so that it can be validated. There server is the game master who needs to know and check everything.
• Update the equipped item on the server, so that all other clients can know the new equipped item and update the equipped item visuals.

Whatever methods you use to accomplish these goals are up to you.

[wide imp]

this is my current logic

aside from setting the equipped weapon, does this add the item to that players inventory on the server?

[jovial steeple]

Yes it’s doing exactly that

[wide imp]

okay and if i wanted to set the equipped weapon, (id have to spawn it in) this also has to be done on the server right? attaching logic can be dealt with later, but spawning the actor in has to be done on the server.

[jovial steeple]

The ItemVisusalActor either needs to be spawned on the sever, or spawned individually by each client using some sort of multicast/replicating variable.

Spawning it on the server is simplest

[wide imp]

okay

and then a multicast to attach

[jovial steeple]

You shouldn’t need to multicast to attach

I believe you can just do that in the server

And it will replicate down to clients

[wide imp]

i was told that things like attaching and visual things should be done locally

and things like spawning it in etc is the server

[jovial steeple]

At that point, with that advice, you would just spawn the visual actors locally anyways. Do not worry about that.

[wide imp]

if i attach it on the server, i wouldnt be able to check if i need to attach to first person mesh (first person) or third person mesh (other client)

because this is a FPS

[jovial steeple]

Do you mean you have two meshes in your character class?

One for first person, one for third person?

[wide imp]

correct

[jovial steeple]

I wound strongly recommended against doing that, that is another problem to begin with.

[wide imp]

how come?

[jovial steeple]

Would be bad practice.

[wide imp]

well im very new to all of this and the only available tutorial i can find did it like that, and im already pretty deep into the project to worry about changing that rn

maybe later ill change it

but ive come to notice a lot of things he does is "bad practice"

[jovial steeple]

Unreals character class has a built in mesh component that uses meant to represent that character mesh.

[wide imp]

ive noticed that yeah

[jovial steeple]

This is so that you can take any character class, and gets it’s mesh

If you have two meshes, this doesn’t work.

[wide imp]

well i can just get the skeletal mesh that im using

[jovial steeple]

Anyways, multicast doesn’t work anyways for this.

[drowsy gorge]

Hi

I have custom pathfinding set up, so I can't use AIMoveTo for my AI, as the location I want them to move to, isn't always valid or reachable on the NavMesh.

So instead, I calculate the direction they need to move in, and use "AddInputVector" on CharacterMovement component.
I do this on tick. It works perfectly.

The problem is, for optimization, I sometimes set the Actor Tick Interval to high values, and when I do this, the AI basically doesn't move, because the AddInputVector happens not often. What can I do?

[wide imp]

why not?

after spawning the weapon, itll run this function on every client

if locally controlled -> attach to arms

else -> attach to mesh

[jovial steeple]

Multicast is a fire and forget function that will only run once on clients who are in range and considered relevant.

[wide imp]

so what would you suggest i do then?

[jovial steeple]

You are attempting to use multicast to communicate an objects state. Something that needs to be known by all clients, and immediately known once a new remote client joins the game, or gets in range of the other client so that they can see eachother and start replicating.

Multicast are exactly not that, they are simple fire and forget to all things in range.

[wide imp]

okay, so how can i deal with the attach logic?

[jovial steeple]

A replicated variable on the other hand will update to all clients in range, as soon as it is set, and update to all clients who become relevant later on.

You need to use some sort of replicated variable to handle this. Attaching the item on the server causes backend replicated variables to be changed.

So I’d recommend you fix your characters to use a single mesh component, then attach the item to that.

[wide imp]

and i can rep notify this since it runs on all clients and server?

[jovial steeple]

On the server

[dusky meadow]

Hi how would i do probability eg run something that takes a 1 in 5 chance and returns if its true ?

[jovial steeple]

Whenever a replicated variable changes on a remote client, the rep notify is called.

[wide imp]

if i wanted to keep my mesh system, how would i attach it to the arms on the local client, and the mesh if not local client?

[jovial steeple]

You’d probably need some sort of “equipped item” variable, with a locally running rep notify function handling the attachment.

[dusky meadow]

Anyone ?

[onyx ledge]

isn't there a random integer node or something

[wide imp]

can i just make equipped weapon rep notify and when it changes i do an is locally controlled check?

[wide imp]

prob, a simple google search would show

[jovial steeple]

Yes

[wide imp]

last question (hopefully)

is this how you properl;y spawn in an object from a class in this?

because when i pick it up equipped weapon is still NULL

[dusky meadow]

Yes but that doesnt fufill my purpose i want to do a calculation which gives a percentage chance and then run that

[wide imp]

random integer in range

min = 1, max = 5

then switch on the result

[wide imp]

this is my goal but i cant drag the class onto class, or the return value onto the equipped wepaon variable

[jovial steeple]

I’m sorry, I don’t think that you can dynamically spawn a component in blueprints and have it auto replicate to clients now that I think about it.

[wide imp]

why not?

[jovial steeple]

Your class variable on the SpawnWeapon function is of the WeaponComponetClass type. The SpawnActor function is of the ActorClass type.

[wide imp]

so would i have to cast it to an actor class?

[jovial steeple]

You can try setting to be replicated.

[wide imp]

i think having equipped weapon rep notify should work. but first i need to actually spawn it in lol

[jovial steeple]

You cannot cast a component to an actor class. They are two separate things. You would need to redesign your system if you wanted to spawn in Actors instead of components

[dusky meadow]

Okay i have attempted that and i have my chance was a int however what do i put in the min and max ?
alsa i am using a more complex equation Unlock Chance = (lock level / lockpick skill + lockpick bonus ) / 2

[jovial steeple]

Anyways I gtg. Good luck.

[wide imp]

min is the min number, max is the max number

[jovial steeple]

Work

[wide imp]

alright thanks for everything!

you want a random number from (min,max)

e.g. (1,5)

1 2 3 4 or 5

[dusky meadow]

I want it so if the lock level is 10 the lockpick skill is 10 then the chance of success is 0.5
or if the level is 100 and the skill is 10 the chance is 20 percent

[wide imp]

i dont know ur full game, so this doesnt really help

i explained how the rand int node works

[dusky meadow]

i have the calculation set up i am saying if i put 0.5 into the node i want a 50 percent chance of it returning true

[wide imp]

so if var == 0.5 -> rand int(0,1) if result == 0, false, if result == 1 true

[spark steppe]

random bool with weight

[dusky meadow]

thank you it worked

[wide imp]

question, if i am working on an inventory system and i have an array of classes, when attempting to add another item to the inventory, do i have to loop through my whole inventory to see if the item already exists? doesn't this seem slow?

[faint pasture]

There's Contains() and AddUnique()

[wide imp]

hey adriel ive made a lot of progress since u helped me yesterday

i had to redo my whole weapon system since the tutorial i followed using components not actors

[storm solar]

im using common activatable widgets (CAW).
When i push widget X to the stack it is displayed.
i press a button on it that X it pushes another widget to the stack (widget Y)
When I am done with widget Y I want to deactivate Y and X instead of standard input of X appearing when Y is deactivated.
How do i do that?

[wide imp]

can someone explain to me why when i add the first item to the inventory it doesn't add the image to the hotbar or the hotbar array? i have a button that tells me whats in the hotbar array, after adding the first item its empty....

[faint pasture]

you have a lot of redundant information here

[wide imp]

i fixed it

with a rep notify on wepaon added

[faint pasture]

hotbar items counter can go away, you don't need it

the size of Hotbar array IS your counter

[faint pasture]

also why do you have an object array and a class array? What's meant to be the difference

[wide imp]

hotbar items are spawned in

inventory items are stored as classes

(for now)

will change to item IDS

updated logic

is this good?

'

i have the variable to cap the hotbar size at 5

the hotbar items

[faint pasture]

git rid of the hotbar items counter variable completely

you don't need it

you have it as the size of Hotbar array

[wide imp]

ur right

but besides that

so is this how i do the current slot now?

(it worked)

[wide imp]

so this sorta works....

my hotbar system has a bunch of spawned in weapons that are hidden

the problem is when switching, itll switch to the right animation or whatever but the gun will be invisible the first time... the second time i switch to that index it works. is there a delay issue here>

note: it changes on the third person mesh perfectly fine , just the first person mesh

[golden plinth]

hi, sorry to bother, but i am trying to recreate the Mad Ballerina boss fight from the bridge curse 2 and am working on the dance animation. I downloaded an animation pack with pre made movement and would like to use the upper part of an animation from a starting time A and the lower part of the same animation from a starting time B but can't figure out how to do it. If anyone knows, i'd be thankful for your help.
(also sorry if my explanation is unclear)

[fringe junco]

Usually people use overlay states to accomplish something similar where you have a base animation, and you use the upper part to animate a weapon or whatever. The layered blend per bone node in the animation BP is your friend lol.

[golden plinth]

i did use a layered blend per bone but do not find how to make it start at the desired time, i tried to use anim montage to cut the parts i wanted but can not add them to the ABP and the start position in the details panel doesn't seem to work

[fringe junco]

you should be able to handle this in a couple ways. the start time thing should work, depending upon how you set it up.

you could also trim frames from the animation in the editor

by duplicating the base animation file, moving the slider on the timeline to the desired start time, right clicking and clicking trim frames 0 to X (your desired start time).

it has to be on the base animation file though, not the montage. The montage should let you play it from a specified time but Im not as certain on the workflow

[steady night]

hi im trying to get a camera image render on UI anyy good tutorial

or whats it called Ä ?

[fringe junco]

you probably need a render target to render camera to UI

[golden plinth]

i'll go with that option, thank you for your help !

[faint pasture]

Any thoughts on how to accomplish a grid-based building system with pieces that can be multiple "blocks" in size?

[shell dock]

this series covers that. cant remember which part it is but hopefully this helps you out - Edit - its this part https://www.youtube.com/watch?v=wAGFzYNXjCc&list=PLxjXJ0AymVT-huSPgUfeCsyXDQm92bXYX&index=10

[steady night]

why are they displayed like this in Widget :/ ?

[faint pasture]

Test your widget with a static texture first to make sure it works

[steady night]

it works

[robust lance]

how can i interpolate between 2 poses? all i can seem to find is a blend by int and bool

[faint pasture]

you really want a blendspace though

instead of reinventing blend spaces

https://dev.epicgames.com/documentation/en-us/unreal-engine/blend-spaces-in-unreal-engine

[robust lance]

i dont see that node

i dunno if blend spaces will work for what im doing. im making my animations perfectly synced across clients based on current state and world position

2 way blend?

that looks like the thing i need, but engine just crashed so need a min

keep getting a crash and d3d device lost when running 2 players

[hardy merlin]

Repeating this every time I encounter the bug: It's possible for a montage to not call OnInterrupted or OnCompleted if it's interrupted between the blendout and completion frames.

[wide imp]

does anyone know why this doesn't show the gun when switching on the first person mesh? just the third person mesh.. unless i switch guns twice then it shows

[hidden fossil]

I almost have the boss set up like I want her to be as I described earlier, but I have two remaining issues. With the change to a move to location, she's susceptible to knockback from damage, and that has a nasty habit of f---ing things up at the other side of the battlefield such that she doesn't throw her orbs or pull her lunge attack until she takes additional damage. (She also too slow for my liking with both the lunge and moving to the sides.) On those two notes, I have a few last questions about her battle design:

1. Does anyone have practical advice for programming an invulnerability state for the boss when she's doing certain things?

2. Is there a way to make her move faster when she's moving along the ground?

3. What would you advise her to be surrounded by while she's invulnerable for the purpose of indicating her state to to the player? (Note that it don't necessarily need to be no "over 9000" Dragonball Super Saiyan effect.)

[faint pasture]

What's this bosses vibe?

[hidden fossil]

easiest thing to say is that she's part of an alien species that gets isekai'd to New York City (as are some of the good guys) and that they have mana manipulation abilities that we obviously don't (although they are able to craft mechanisms with the properties of their essence for other sentient species to use for that purpose if the need arises). In the case of the boss, her orbs are made of telekinetic energy and she's also a swordfighter, so when she's not trying to lunge or fire at you, she's trying to downthrust into your head (which you have to think fast to dodge).

And being a member of the same species, the kitty knight that you can play as also has this telekinetic ability (although in her case she can focus energy into it so that it fires off bigger and stronger)

[faint pasture]

I'd do some sort of a mana shield

[faint pasture]

what in the everloving fuck

[thin panther]

holy mother of repetition

[hidden fossil]

god damn

that's a fucking lot of nodes

[idle crescent]

Does UE5 have a way to check the color value of a image's pixel given the pixel's coordinate?

Even in C++ is fine.

[thin panther]

That's going to be a rather expensive operation.

[idle crescent]

For me? Or the above with the torrent of nodes?

[hidden fossil]

if not both

[idle crescent]

To who?

[thin panther]

You

[idle crescent]

Ok. I wasn't clear.

Thanks.

Even if I did it in C++ it would be expensive?

[thin panther]

Yes

[idle crescent]

:/

[hidden fossil]

also, and as an aside, there's a separate chat for the #cpp side of things if you need it

[faint pasture]

What are you trying to do?

[idle crescent]

Yep. I know. I'm just not sure if BP has something.

[thin panther]

The only way off the top of my head that you can do it is by rendering to a render target, converting that to a texture2D, and then sampling the pixels.

I still highly advise such against it though if at all possible

[idle crescent]

Get the color of a pixel from an image, using the pixel's coordinate.

I'm trying to read a heightmap value to see if it slopes in directions, that could block things among others.

[faint pasture]

a million times per frame, once, once a second? WHere is this image from.

[idle crescent]

Could I use external libraries to do it?

That could be more optimal?

[thin panther]

You can use internal libraries to do it.

[idle crescent]

True, but if external is more performant I'd do it.

[thin panther]

The issue here isn't an Unreal one. It's a Graphics one

[faint pasture]

You can do C++ code on arbitrary textures, it'll be pretty easy to do if it's a texture on the CPU side. If it's coming from the GPU that's a whole other matter.

[idle crescent]

I'm just thinking about ways to do things.

Trying to optimize, like if I do a line of sight check, if there is a hill between two points and I can tell so with the image data I don't need to do a raycast, and that sort of thing.

[thin panther]

A raycast is infinitely faster than texture sampling

[idle crescent]

Ok. It's not a texture so much as it is just a greyscale PNG.

[thin panther]

Don't optimise until you've identified an actual issue here

[idle crescent]

It's not applied to any materials or anything. Just an image.

Ok.

Good point. I'm just trying to plan ahead if it proves an issue.

And I like to optimize up front to keep things as smooth as possible.

[thin panther]

If it's just an actual already existing texture, it's a hell of a lot simpler than analysing a rendered scene.

Cheaper too

I'd still just advise raycasting though

[faint pasture]

@idle crescentHere's a function from my tilemap plugin, you can probably go in the reverse no problem.
https://github.com/AdrielKinnunen/SpectrelightPlugins/blob/main/Plugins/SLTilemap/Source/SLTilemap/Public/SLTilemapLib.h#L460

as long as the texture is on the CPU already it's not much of a problem

if it's being created by a shader it's a whole other can of worms.

[idle crescent]

Nope. No shader.

[thin panther]

Optimising up front is a bit of an oxymoron at times, as you have no idea of the actual real world cost of things.
Keep things simple, go complex when simple doesn't work imo

[idle crescent]

It's not used for a material either, just a png file.

[thin panther]

That's doable then

[faint pasture]

In this case going from a raw PNG to a vision field is much simpler than turning it into a mesh or terrain and raycasting

[thin panther]

The way I'm seeing this is that the terrain and mesh already exist, and the image sample is to prevent just raycasting in the world

I could be misinterpreting

[idle crescent]

Right. A way of optimizing.

[faint pasture]

you don't know that they already exist

if they exist then sure raycast

if they don't then doing the operation on the texture is easy

[thin panther]

In any case, you can just sample the texture. Texture2D has functions for getting it's pixels iirc, whether they're blueprint exposed, I'm not so sure 🤣

[idle crescent]

The world is so big, I can load only part of it at a time for collision.

And it's just a color image, no normal or anything than diffuse.

[faint pasture]

So do you have 1 PNG file that is used for the heightmap for your terrain AND you wanna do analysis on it?

[idle crescent]

Yeah.

Well. 2. But they're both greyscale.

[thin panther]

I'll have a check on those functions when Rider decides to actually load lol

[idle crescent]

Alright, cool. What's Rider?

[faint pasture]

BP Function Library would be the easiest path

Best IDE for unreal

[idle crescent]

Alright. Still just wondering what performance hit'll be

[faint pasture]

Probably not even noticable

[idle crescent]

With raycast or pixel check like I said?

[faint pasture]

IDK about reading but I write a full 128 x 128 texture every frame and you can't even see it on the profiler

[idle crescent]

NICE

[thin panther]

checking pixels and raycasts are both probably negligable costs.

[faint pasture]

assuming the texture is on the cpu and you can do whatever you want with it without any thread locking shenanigans you can do whatever you want there

Look at how fast Paint can do a flood fill

[idle crescent]

True. It is also a big image, but then, knowing the pixel I think that brings it back down to o(1) doesn't it?

[thin panther]

https://forums.unrealengine.com/t/accessing-pixel-values-of-texture2d/279798/9

That looks like a promising lead

And yeah, as Adriel said, I'd make a Function Library to be able to make a node that takes said texture, said co-ordinates and outputs the pixel color, that you can use anywhere

[faint pasture]

Yup then later once you got that working you can make another node that takes 2 coords and a frequency and can output if the height crosses the line between start and end

[idle crescent]

Yeah. Make a function for what I do a ton is a good idea.

Wasn't there a function in UE5 for Angle of reach for projectiles, or something similar?

[faint pasture]

predict projectile path or suggest path or something like that

suggest velocity maybe

[idle crescent]

Close. I think there was something that let you pick a high angle or not.

[faint pasture]

https://dev.epicgames.com/documentation/en-us/unreal-engine/BlueprintAPI/Game/SuggestProjectileVelocity

[rain peak]

sorry if this is a super stupid question, but - what might be causing this? I've got a struct with a float value (Magnitude). As you can see in the watch, it's 0.93.

At the next node with the breakpoint, it's 0.000.

garbage collected in the meantime somehow?

what am I missing

am I going insane

[crimson talon]

Been having an issue with how my target lock on is working. The idea behind this is to focus the camera on a middle point between the player and their target, but as you can see in the video it keeps going behind my character. I have the code I used for this attached also, if anyone can help out identifying the problem or even to how I could implement this better I'd love to hear

[lunar sleet]

Put a breakpoint on the next node then hover over the same pin and see if the value is now updated. Either that or print string

[river hill]

Man, i am having this craziest issue with just getting a simple triangle to select units rts stye to work. i got the rectangle working, but it doesn't select any units. i can select, and deselect my units if i left click on them, but the rectangle just isn't selecting them. there must be something simple i am missing.

[spice vapor]

Hello, how could I optimize that, my project will need more than 2 result. I try the Identical node, but it only work if the correct order has been made. Thanks in advance!

[surreal peak]

Best would be to not hard code this stuff

[wicked sedge]

This is exactly the feeling I want to inspire thank you all @faint pasture @thin panther @hidden fossil

[white oxide]

How come I cannot have the BP_ThirdPerson pawn both ovelap events to print hello and have it so the NPC blocks the BP_ThirdPerson?

I can either have the Third Person character be blocked or generate an Overlap event, but not both

Oh I see... I cannot have it both ways because the capsule itself is either a blocking or generate overlap... does that mean I should create another capsule collider?

Yup creating two colliders does the trick

My second question is how come pressing the E key doesn't activate Print String as desired?

I enabled Auto Receive Input but no dice

D'oh! I set the class defaults on the wrong Blueprint, silly me haha

[spark steppe]

because blocking elements can't overlap, that's law of physics...

you may want to use OnComponentHit if they both are blocking

[stone field]

you need to think in a more flexible way, making a system that will be able to process 100 different orders without you hardcoding everything. Perhaps make the order also be an array of ingredients.
Then

• check if the ingredients list length == order length - if not, immediate fail
• loop throught the ingredients and compare to order items, if there is something not in the order, fail

[young meteor]

This might be a stupid question, but I was wondering if anyone have a good set of rules on how/when to comment on their BP code.
There might be some obvious industry standards or something that I'm missing by just having learned this stuff on my own (probably like many of you).

The project is getting to a size where it takes a lot of brain power when I need to change something.
Could be just a variable in simple cases, or functions in more complex cases.

It is great that I can right click and search for references, even in other blueprints with binoculars, but still.
It often ends up being thoughts of:
Am I still using this variable anywhere else?
Can I modify this function to also do this, or is something else depending on it?
Where is this naming needed for DT's?
Which other Blueprints must I also keep in mind when modifying this function?

That kind of stuff. Hope it makes sense.

[dark drum]

I tend to comment when I feel what I'm doing isn't obvious. (granted this is very subjective)

If you stop using a variable, mark it as depreciated. The same with functions. Also include in the description what someone should use instead if applicable.

Using getter/setter functions and marking vars as private works wonders, there's nothing worse than having to go through 20+ bp to update something when if you had a getter function you could have just done it in this.

Avoid having another BP directly set a var of another BP, use a setter function.
Setter functions are great places for event dispatchers if you need to broadcast a var has updated it's value. This can give you more flexibility with making changes.

Splitting you're logic up into steps can help especially when assessing the feasibility of inserting something new. Take an interaction for example:

trace -> check -> focus/unfocus
Input -> check -> start interact -> move character -> play montage -> perform interact -> end interact

Of course there's more you can put in but having these as self contained steps can help modify or add new behavior. If you want to change how the character moves, you know you need to modify the move character function. Not happy with how the interaction is ended, modify the end interact.

Also make sure you keep things to doing only what they should be responsible for. Having the player character control the light colour of a button panel on the other side of a map is most likely going to get missed. Should the enemy really be giving rewards itself? Should that plant pot really be responsible for controlling if that door is usable?

[white oxide]

How do I get this set node? The menu when I type in set is endless

[dark drum]

Type 'Set Player in Box'? or drag it from the vars tab.

[white oxide]

Hmm the set still doesn't seem to appear for me.

I'm just trying to set a simple Boolean when the player presses enter AND overlaps the collider

[white oxide]

Oh I see, the issue is I didn't create a variable

[timid crag]

Hello! Can anyone tell me what is wrong with my blueprint? My items teleport to 0,0,0 when they and picked up or dropped

[young meteor]

Thank you. Guess I can try even harder to split functions into blocks.

Not sure what the getter/setter functions are.

Guess there is no easy way to manage stuff. Probably comes with experience too.

[dusky cobalt]

Comment as much as you want. I don't think there is any strict rules. As you said you can make comments as ''blocks'' to separate blocks of code that are doing something specific. Like you can comment 4 nodes that all take care for Create X Widget. Finally you will find a pattern that fits you. Remember comments are mostly for you or for your team. You would probably adapt it differently when you are working solo vs when you work in team. If youa re solo, you have more freedom how you want it.

The setter and getter functions are basically functions that ''set'' the variable (and that's mostly it, literally). Instead of directly getting and setting the variable (like get ref, get variable on it or set), you make the variable private and create Function Set Health, now instead of getting component and the variable on it dirrectly, you call that function (still on the component ofc). It might seem redundant and useless, you don't have to always apply it tbh. Its something mostly used in C++ as good practice to hide variables and expose functions (so you can only ''access' the variables that actually can be set/get instead of making everything visible by default.

So it comes from making everything private, and WHEN you need it, you create function for it to expose it. By default everything is private/protected (cannot be accessed/changed from outside).

These things come mostly with iteration and finding your way that works for you. There is no correct way I believe. There are some good patterns/practices to make example of, but it's mostly comes to iterating on what you like, what works for you.

Generally, the simplier the code the better, it takes 10% of time to write code and 90% is maintaining it. You also must accept there are some functions/bp that you will create that are complicated, and it's ok, some things must be, comment there and describe so it's easy to come back, even though it's complicated. Usually the code is self-explanatory.

[dark drum]

This is an example of getter/setter functions. The 'SomeVar' is private so if anything external to the BP wants to change it, they have to use the setter function. This gives the owning BP more control of the value and makes it easier to track down issues.

[dusky cobalt]

Also one tip that might help you. After I finish some ''version'' of my blueprint or code. I tend to stop and just describe in block of words what this blueprint is supposed to do, what functions it has, what variables. It helps me to understand it more, summarize what it does and what it should do, and what it might do in the future. Thanks to that it's just getting organized better in my brain and then in worst case If I forget something I have one page of description for each blueprint.

[young meteor]

I guess there is no super easy way around it.

It is specifically 2 scenarios I feel like:
Dispatchers - mostly when I have multiple Bp's listening to it - Then I have to think when I see it: Who is listening to this, why are the variables passed in it as they are, can I change it, Is it being called multiple times, etc.

• Guess for that one I will simply start commenting what BP's are listening to it and why. Then edit the comment when I make more BP's listen for it.

When I call functions in other BP's by cast or similar. It is fine with one, but when it starts to be a web/chain of things happening, it is very hard later when I come back. Then I feel like I have to try and "load in" all the BP's that might be related in my head. And by the same token, keep all those in mind when I edit something.

Actually just explaining the problem is making it more clear to me.
Divide functions into clear blocks, and comment relations/dependency as I add them to called functions/dispatchers.

Thank you 😄

[dusky cobalt]

Feedback to the dispatchers: The one that is broadcasting shouldnt worry at all what is gonna listen to it. It happens naturally. It just broadcasts and that's it. It's also cheap because it's just telling, hey this happened. Other things bind to it as needed, and often these things are very related. Event Dispatchers are just better because instead of having event for ''4 things'' that should react and then calling Do X, Do Z, Do C, you call dispatcher and don't care. Things will bind to it and react on their own. So I wouldn't try to comment a list of things that listen to it.

In example, OnDayStarted, the time manager should just broadcast so Call OnDayStarted, it and it doesn't care about flowers that start growing, or a sun that should start sunning (lol). These things jsut bind to it as needed. Broadcaster doesn't care about them.

[narrow sentinel]

Anyone know if theres any good guides out there to implement setting scalability settings for game/runtime side ?? Basically need to handle for the system can't do Hardware ray tracing and when it can.

[young meteor]

Yeah, they are great in that sense. Still feel I need to comment in some cases, cause otherwise when I come back and want to edit the function that calls the dispatcher I run into problems like: Are the other BP's ready if I call it earlier instead, If I change this passed variable, will it work in the listening BP's etc.
Might just be a "me" thing.

[spark steppe]

do the bindings not show up in reference search?!

[dusky cobalt]

Valid concern. If you call at the same time when things are binding, it might be too late. Mostly in case of something beeing initialized or on start, because then when game is already running and something happens alater, it should be binded already so no need to worry. In case of initialization usually delay before that ''virgin'' call should be fine. No need to over complicate things if there isn't better way. Only fix things that don't work 😄

[young meteor]

It does.
It is because I started a conversation about tips on how to comment etc. to have a better overview of my own code.

[spark steppe]

you can just do reference search on them

[young meteor]

Like I may have 5 BP's listening, but then I have to open them up and understand complex functions in all of those before I can start to do any edits with confidence.

[rain peak]

it's updated to 0.000, but 0.93 on all previous nodes

[spark steppe]

that's a you issue then 😄

if you have the fear that your events screw up others, you will have to take care of it

[young meteor]

yeah. Figured others might have standard approaches on how they set up their code and comments for easier workflow/overview.

Think I got my answer with breaking down complex functions into blocks of easily understandable blocks as well as commenting (in my case) on my dispatchers.

Guessing it is lack of experience. Because I keep learning more and doing things differently, so there is no "standard" or "obvious" approach to things for me yet.

[granite nacelle]

Having some trouble making the enemy go through doors or go up stairs

[silver dove]

Is there an easier way to do this than digging it out of this submenu? I do this a lot and it's frustratingly slow - like a keyboard shortcut or something?

[spice viper]

Check the actor's Movement Component -> Walkable Floor Angle, I'd also look at your Navmesh's Agent Max Step Height so you don't need to have NavMesh Links.

[spice viper]

I'd recommend #animation

[golden plinth]

thank you i'll post it there then

[hexed igloo]

Hello, why is this BP_Zombie has dependency of the player character which is about 300mb shown in size map?
Size map: https://iili.io/3ek7hR1.jpg
Event graph: https://iili.io/3ek7jOF.jpg

[spark steppe]

look at what FollowPlayer does

also, it's pretty irrelevant

your player will be loaded anyways

[hexed igloo]

There is "Get Player Controller" there in the FollowPlayer event, but size does not change even if it is removed.
This is tutorial project, size is not important here surely but I want to know why for the learning purposes.

[rain peak]

show variables

this looks like a potential hard ref to BP_Gate

[hexed igloo]

variables: https://iili.io/3evLcdu.jpg

[rain peak]

try removing this

also, the sizemap doesn't update until an engine restart for me

[hexed igloo]

Thank you, I missed this.

[rain peak]

hard refs from class filters is such bullshit, i know

[celest crown]

Is there any way I can get the Edit layer name of the landscape with blueprints?
I need it for the Editor Layer Name node.

[faint creek]

Hi guys, I noticed these two warnings, but the game runs well without any bugs or stutters
Are these warnings dangerous?

[cerulean mountain]

Got a question for anyone who's able to answer.

For context, It's an all blueprint project

I'm using DataTables to store info about my enemies — things like ABP, mesh, weapon data, health, damage, etc. I'm fine with editing them manually and seeing the changes in the level editor. But I want to make an Editor Utility Widget (EUW) to speed things up. Ideally, the tool would let me tweak DataTable values (like switching out a mesh or weapon) in a designer-friendly way and preview those changes on an actor in-editor, then save those changes to the DataTable.

The potential issue is that I’ve heard DataTables are read-only and can’t be written to at runtime. I’m not trying to change them during runtime though — only through a custom editor tool like a EUW.

So my question is:
Can I write to a DataTable from an Editor Utility Widget, or do I need a workaround like editing the struct, exporting it as CSV/JSON, then reimporting it? I dont want to build it then run into this issue later the line.

[slate minnow]

GetGamestate returns nothing when function is called using Web Remote Control API

I'm using my website using websocket to call a function in Unreal through Web Remote Conteol API. Everything works fine if the remote control preset window is on. but if this window is closed, the function does get called but it cannot find the game state (The function calls another function from the game state). What could be the reason and how can i solve it? Thanks!

[spark steppe]

afaik you can write them in editor utilities

just wrap up a simple test, that would confirm this!?

[cerulean mountain]

Good to know. Will prototype and get back to you. Thanks a bunch

I'm still new to ue5, so a simple test would take me a bit longer so I want to confirm real quick before I start prototyping a specific implementation.

[dusky cobalt]

Maybe you call it too fast and it's not initialized yet? Do you call it on begin play of some other class?

[slate minnow]

no i dont call it on begin play. i can call the function whenever i want so i can give it all the time to initialize. but how can it work with the rcp window open though? like how is that any different right?

[dusky cobalt]

i didn't ever test it so I cannot help, sorry, maybe someone else know why it doesn't detect gamestate when you close window

[slate minnow]

thank you anyways man. appreciate it

[final berry]

So I was wondering, I have a datatable with all information about my talent/tech tree, but to track the level of each node I have this ID -> Level Map which is accessible everywhere (very light actor that contains only other variables like it) (screenshot 1)
My question is if that is a solid way to track it as well as access the levels where I need (for each tech) or should I have an array of structs (the structs used for the datatable) within that same actor to keep track of everything (screenshot 2). The main advantage here is that I can just search on Enum so I 'll never make a spelling mistake, but it seems a bit convoluted to basically do the same thing 🤔 What do you think?

[dusky cobalt]

Where is your DataTable and how it looks like? Do you set the array of structs with data from DataTable at the begin play and then access that actor when you need some data?

[final berry]

I use the datatable to fill my tech tree UI with nodes procedurally (snippet of part of the table)

[dusky cobalt]

Okay, so what is this actor for with the struct then? If you have data table you can read rows already?

[final berry]

Well.. I guess im running into the how do I change the curlevel of this datatable without messing with everything else 🤔 It has a curlevel variable but not using it atm

The ID -> Level map seemed like a lightway approach to it

[dusky cobalt]

Oh, so you kind of wish to edit the variables in the data table as the game is running? So you only need datable to ''initialize'' starting requirements etc. but then you want to write on that?

[final berry]

Well I dont want to per se 😛 I dont know what is the right wow. So basically:
A. Write into the datatable
B. Id -> level map
C. Struct array (so I can keep the datatable intact)

Or even D. that I dont know of

[dusky cobalt]

CurrentLevel is what for? it's like each node of the tree has level? or the current level is almost like ID ?

[final berry]

Its what the tier of the tech is at. So in this case the 0 of 0/5 and 3 of 3/5

[dusky cobalt]

Oh, I see okay.

[final berry]

So I was trying to avoid writing into the datatable (also because I dont know how) , but also beacuse it seems very convoluted for just tracking of the curlevel

[dusky cobalt]

Maybe someone w ill come up with something better, but I would just have something like SkillTree actor, on begin play read whole datatable and initialize it into TMap (ID, Struct(with data) and work on it.

it's like your manager for the tree that tracks current level, current upgrades etc. in the game.

and then you can access it easily with GetActorOfClass (SkillTree) because it's basically just one in the game.

[final berry]

I thought I couldnt make a Id -> struct map 🤔

[dusky cobalt]

In the best case you could also do it as UObject or ActorComponent but it's a minor upgrade really and I wouldn't worry about it right now.

[dusky cobalt]

Use first int and then add struct as value.

you can also use Enum or FName or anyhing really you want for the ''ID''.

[final berry]

Oh im a moron lol

[dusky cobalt]

Probably you heard that but wont hurt repeating, make your structs in C++ to not destroy your project 😄

[final berry]

Wait what?

https://tenor.com/view/sweating-nervous-wreck-gif-12986085083782148824

[dusky cobalt]

making structs in blueprint can fuck up your project in a short words

[final berry]

Wait what, how huh? I only have made structs in blueprint

spongebobpatrickpanic.gif

[dusky cobalt]

they are bugged, can corrupt the blueprints

if you add/remove variables they don't get cleaned up nicely etc.

[final berry]

That's terrifying, I have like 20 structs in blueprints

[dusky cobalt]

oh damn, yeah I would definitely put them in C+=, it's nothing hard

[final berry]

Okay... Ill take a look

Do I need to redo my tables then as well?

[dusky cobalt]

if you type struct in search in discord you probably will read a bit more advice like that and why

nah, only structs

andenums but i think enums are not problematic

both very easy to do, nothing crazy

you can ask chatgpt to create them for you at first so you dont have to worry about syntax etc.

[final berry]

Aight yea. But what I mean is that if I remove the current structs I have to replace them with the new C++ structs then I need to repopulate my data tables because the struct changes, no?\

Anyway cheers, sounds like an issue for tomorrow-me, though 😛

[dusky cobalt]

btw if u have data you can click ctrl+shift and mouse button to copy all values of struct

so before u delete old one, create new, copy paste, save and delete old

[hardy merlin]

I strongly recommend not using data tables for what you are describing. Use class inheritance instead. It will make your life significantly easier in the future.

[cerulean mountain]

What advantage does that provide?

I mean I understand inheritance and polymorphism and overriding behaviors, but tons of blueprints give me the ick

I have inheritance on combat behaviors. Enemies and weaposn are data driven so I just plug in the behavior onto the enemy and it separates concerns. Easy to be modular and swappable

[hardy merlin]

Things like AnimBP and mesh are already handled by class inheritance and regular blueprints. It lets you make characters hierarchical. It also means you can do function overrides, add new variables and components without affecting other characters, and so on. It's much easier to make sense of your project if an individual enemy is an individual asset instead of merging them into one giant asset. Meanwhile, a data table will grow, and grow, and grow forever. If you want to be able to do mass editing and comparison you can use the Property Matrix.

Blueprints are designed for being able to subclass the parent class and just change some variables. They're small.

I've seen enough data table misuse that I warn against it whenever possible.

[cerulean mountain]

What are the future problems you're referring to?

[hardy merlin]

If you want to add new functionality to a particular creature you can't just override a function, you have to add flags or new columns to the data table and now every enemy in the game needs to track those values too.

Also, you have to manage asset loading more carefully because assets are no longer managed by individual creature.

[spark steppe]

they aren't bugged, their reference fixup is bugged

when you change them you should first save everything else, then modify the struct and save only the struct, then restart the editor (without saving anything else)

[final berry]

I have changed them, not sure if Ive done that entire process but havent run into an issue yet 🤔

[spark steppe]

yet

it doesn't always happen

[final berry]

Alright, Ill change them asap

[spark steppe]

or epic fixed it... didn't hear for a while of corrupted blueprints

[sand shore]

If you define them with the same layout, you might be able to use core redirects to migrate the data. Basically you have both versions of the struct, you set up the redirects, and then you resave all the affected assets.

Caveat: I haven’t personally done this, and BP structs are usually unstable. So, either make a hard backup or look into #source-control, make sure you test packaging before moving on.

https://dev.epicgames.com/documentation/en-us/unreal-engine/core-redirects-in-unreal-engine?application_version=5.3

But honestly, having the same member name for enums and even regular struct members is going to be a pain.

I would really consider making a custom editor utility to migrate the data

[stone field]

I'll be honest : I hate having to actually read blueprint nodes to figure out what is going on unless they are very brief indeed. If they are sprawling behemoth spaghetti, it is very daunting. IMO optimally bps should be commented into clear blocks of "this bit does x", "this bit does y", so when I need to look for something, I should be able to find the area I need just by reading the comments - then drilling down into the actual nodes of the area as needed.
Blueprint Assist and AutosizeComments plugins for the win.

[sand shore]

I like having roadmap / signpost comments for things like @stone field suggests, and you can take that a step further by using dedicated event graphs for different things too.

The other thing you should do is make “why” / explanation comments. “Store this handle so we can cancel later or check the status, in XYZ” or something like “this is impractical but we need to do this so that ABC”

If I am writing a complex loop (for instance, manually recycling widgets in a list view) then each phase of the logic gets a comment.

https://github.com/Allar/ue5-style-guide?tab=readme-ov-file#344-graphs-should-be-reasonably-commented

[stone field]

A simple example of relevant blocks being commented

[short hinge]

Hello everyone! Does anybody have suggestions on good learning materials when it comes to Animation Blueprints? Most of the youtube videos are basic stuff, and using sample projects like Lyra are a starting point, but I don't understand half of what is going on there and I'd like to learn why things were built like that, not just copy and paste. I already learned the basics of slots, and the basic locomotion stuff , etc, but when it gets to more complex things (e.g.: playing a fire montage on top of my aim offset position), I simply can't get it right.

[crude tartan]

Hey All - Is it possible to set the bone transformations of a skeletal mesh in an editor utility (so it happens in the editor world)? I've tried using poseable mesh with the Set Bone Transform by Name node but it doesn't work.

[gleaming relic]

idrk what category this would go under but

Is it possible to procedurally sculpt into landscape at runtime using splines? I'm trying to make a procedural cave system and can't rlly find an easy solution to it. I know u can do it with voxel plugin pro but i aint paying $350 for that 😭 , if not any other suggestions to make procedurally generated caves with splines?

[faint pasture]

Not without some fancy c++

[maiden wadi]

The short answer is no. Not with the landscape Unreal has built in. It's an "okay" system, but it's extremely static and meant only for a pretty static landscape. The best you can do are place circular "Patches" that deform the terrain, but they're not really that workable. You also cannot have caves with the default landscape either, it's nothing more than a deformed flat plane.

If you do not want to pay for something like voxels, your only real choice is learning to use the dynamic mesh stuff unless you want to dive into C++ and make your own similar system.

[snow halo]

Hi, so I've done this before I just dont really remember how I made this work exactly...

So on my Animation Update BP im having this branch execution...

IIrc this works on tick too right? Probably not a big problem though

My question is where is this animation being played?

This is what my anim BP graph looks like

also my states here have nothing to do with this...

[still gust]

anyone round?

I got a weird problem that's prolly very easy and quick to solve

but ive got no idea whats going on

[snow halo]

oh wait I got it, so I just need to plug another sequence in here ☑️

[jovial steeple]

Just ask the question, nobody whos around even knows if they can help you.

[wispy canyon]

is there any good way to reparent a component in an actor BP?

i.e I have an actor with an inventoryComponent of type UMyInventoryComponent, I want to change the type of that component to UMyNewInventoryComponent which inherits from UMyInventoryComponent. basically analagous to "reparent blueprint" but for a component?

[still gust]

i got a weird issue where my remove from parent node is accessing none, i think cause a hitbox overlap cast is creating more than 1 addition to the viewport, and the it loses the reference trying to delete it when i move out of the hitbox

thats what I THINK is happening

im trying do once nodes to try to stop it from making more than one UI element

[jovial steeple]

Are you talking about reparent a blueprint, as in changing the parent of of a given class to another class?

UMyBlueprintClass
  Parent = UMyInventoryComponent

To ->

UMyBlueprintClass
  Parent = UMyNewInventoryComponent

If so, you can reparent a component class i the same way you reparent any actor class.

From what your example describes however, it seems you may be talking about replacing a component on an actor?

[still gust]

thoughts on this solution? it seemed to have fixed it

[jovial steeple]

Are you attempting to swap a componet assigned to an actor out for another component?

[wispy canyon]

yeah, sorry, I could've worded that better. I've got a BP subclass of a c++ actor class. I then there's a component that's been added to that BP actor class, let's called it UMyInventoryComponent. This component is a straight C++ one, not a BP component class. I want to change the type of that component to a new component type that inherits from UMyInventoryComponent

it's an old project and the variable associated with this component is referenced in tons of places, and I don't want to break all those old references

[jovial steeple]

Instead of this cursed DoOnce, you can instead see if the reference is already valid, before trying to create a new widget.

[still gust]

check isvalid? what's the node called

[snow halo]

Hi, question, I still haven't figured this one out

how do I set up another layer blend per bone here?

Can I set this up via ENUM?

[jovial steeple]

You cannot "change the type" of a component added to an actor class. You simply need to create a new component, and replace the references. There is a replace references tool that you can use to automaticly find and replace blueprint references to things though.