blueprint

[wet surge]

XD

good luck with that 😉

[crimson swan]

something like this

[wet surge]

i think it could work

its not what i had in mind but could work

[indigo bough]

I've got a world-space grid, stored as an array of vectors, where X+Y=Direction, Z=Speed. The grid needs to read data each in-game month and update the associated vector from a pre-determined set of values for each grid square.

This most likely needs to be done server-side, due to the fact it should reflect for all players. I'm guessing it's a case of bringing this data in via csv, and running an update to a different csv/sheet every 'month', and then vinterp'ing to the new value as needed?

Also, would there be any significant cost if each of these data points were a struct instead of a vector? Would be helpful if each grid space had a few other variables associated with it, but if it's going to be a problem I can make do without.

(There are about 2000 grid squares, each representing a square of 250 kilometers2)

(Basically, this)

[indigo bough]

Try 'Set Intensity' instead? Or use a Light Function material

[fading wren]

why my dot product is so big

https://cdn.discordapp.com/attachments/455044559240429568/865929424749461534/unknown.png

i want to get dot product from wall forward vector and player when player overlap wall colider

[indigo bough]

Because you are adding your WorldLocation to it

[fading wren]

ok, but when i dont add WorlLocation, DrawDebugSphere - draw a sphere in centre of the level in (1,0,0) coordinate

it doesnt draw a sphere in centre of wall

[indigo bough]

Are you trying to draw the sphere where the line trace hits?

[fading wren]

i want to find a dot product from player forward vector and from wall forward vector. I am using DrawDebugSphere just to check, if it found ForwardVector of wall correctly

[indigo bough]

Well the dot product isn't going to give you a world location, it's going to give you an angle between the two forward vectors

[fading wren]

i know

i need it

[indigo bough]

You would need to draw the sphere at the GetActorLocation of the wall?

[fading wren]

let me rephrase. just forget aboyt dot product. Why when i using DrawDebugSphere, and using a GetForwardVector of the wall, it draw a ball in centre of the level, but not in centre of the wall ?

[indigo bough]

Because the forward vector does not include the world location of the wall

only the directional vector of where it is pointing

You need to get the wall's world location and draw the sphere there instead

[fading wren]

do i understand you correct. blue - is forward vector of the wall also blue is world 0.0.0

@indigo bough am i correct ?

[indigo bough]

You are confusing two concepts (I think, sorry if I don't understand you properly)...

Forward Vector is just which direction the object is facing. For example 1,0,0 means it's facing directly towards the +X axis.

You are trying to draw a debug sphere at the wall, so you need to know the world coordinates that the wall is to draw it there instead of at the world origin (0,0,0).

The Forward Vector isn't going to get you this, you will need to calculate the position of the wall and drawing the sphere there

[fading wren]

ok, got you, thanks

now i want find a dot product

of forward vector of the wall

and vector from hit point of ball

[indigo bough]

Just a guess, are you trying to calculate ricochet / reflecting?

[fading wren]

yeap

[indigo bough]

You don't want the wall forward vector

You want the impact normal

And the surface normal of the wall

[fading wren]

well, looks like i am lost. i thought forward vector and normal of actor is same

how do i fin normal of surface of wall ?

[fading wren]

how do i fin normal of surface of wall ?

surface normal of the wall, sorry

[indigo bough]

https://michaeljcole.github.io/wiki.unrealengine.com/Simple_Line_Trace_Ricochet/

This will probably tell you how

Hit Normal is the 'forward vector' of the hit direction

Normal is the normal of the wall

[fading wren]

do i understand correctly i need make secon LineTrace by chahel ?

[indigo bough]

I recommend reading the full document, it explains how to create a ricochet line trace

If you copy it 100% you will probably have the result you want

[fading wren]

ok

thanks

[spring nebula]

so, I need a float value of 0.0000001. Is there not a way to enter this in blueprint?

[open crypt]

I'm trying to spawn actors equally across a spline - I'm trying to use spline length but I'm not sure about where to put for locations

[fleet heron]

hello!

how can i give Y axis direction to the subject

need to press the button and by pressing the button move forward / backward

i did it but i don't think it's right

[faint pasture]

Got to run a line Trace to it and the hit result can return a normal.

All hit results return normals, use those. I'm sure there's probably some way to get the normal of a specific triangle of the geometry, but that would probably be a bad idea

[fading wren]

ok, got it. additional question, when i am using RotateVector node what is pivot point/origin for rotate ?

[indigo bough]

Hit location

[faint pasture]

It rotates the vector around it's origin.

1,1 rotated by 90 in yaw would become 1,-1

[fading wren]

thanks

[fading wren]

great thanks

[open crypt]

Will this function still work, even if the object from the Other Actor (leaving that first cast) is not the same as the output of that cast -

If the second cast their succeeds, it means its a different object type, so I"m not sure if it will use the "**Get Distance To and only care that the object in question is an actor, (whether it is the AI car source or Character won't matter, right?

[supple dome]

it wont work, because the return of the cast when failed is nullptr, just use the uncasted object and get actor location, (or cast to actor if its an object)

[errant snow]

Yes it will matter and no that won't work. The GetDistanceTo will always use the output from the first cast which, if it fails, will be none if you try follow the success line from the second cast. To make that work you would have to a) be passing in the same actor to both casts (which is impossible to tell from that picture) and b) connect that pin to the GetDistanceTo instead of the output of the cast.

[open crypt]

so just a matter of duplicating that above but for each cast result

[open crypt]

I know it's probably not the best way but I need to get this done

[errant snow]

Sure, that would work too.

[open crypt]

Can you explain why this is returning an object that isn't on one of these object types in the collision channel? What am I missing here ?

The object in question is WorldDynamic

And while it is set to Block all Dynamic (the arm gate is), if I am line tracing to it but only line tracing for objects of Pawn or vehicle, how is the line trace hitting it?

[open crypt]

What am I missing here?

[errant snow]

Beats me. not a node I've had to use so I don't really know how it works or how that input is used.
You really shouldn't be tagging people that help you with one question on completely unrelated ones.

[lime moss]

Hey guys, so I'm trying to optimize my navmesh, and I wanted to know, how many UUs are in one full square of the M_WorldGridMaterial that's a part of the engine

[indigo bough]

If I wanted to lerp between these DT vectors based on the 'current' and 'next' month over the course of the month length, how would I do this? I don't want to be reading the DT every tick to vinterp surely?

[ivory rover]

hi I have problem with game mode blue print
I set it to spawn player base blue print and it work fine
until some point that I do another thing
it's start to not spawn my player base and spawn default pawn in stead
and I check that the setting is the same
I never move the start point not sure why it happen

[faint pasture]

What is the other thing you're doing?

[ivory rover]

I just start to working on new widget blue print kind of

but now I just re create new game mode class
and it just working
maybe I mess up with the last one in some option without knowing
thanks @faint pasture

[elfin inlet]

i dont understand what you're asking

but a do once node might help

where are you lerping?

[indigo bough]

Ahh, so I'm lerping between the Jan/Feb/Mar, etc. vectors based on the current day of the year.

These vectors are wind direction vectors (Z=speed)

And there are 12 months of vectors for each global grid coordinate (basically every 10km or so)

My plan is that over the course of the year, each grid's wind direction/speed lerps between the values in the DT

Essentially I want Jan 30th to be 0.5 lerp between the Jan and Feb vector values

[stoic magnet]

@indigo bough create an event for day change, get the current month and the next month and execute your lerp / averaging then. If you don't want the wind to change abruptly maybe execute the change with a timeline so it blends.

[indigo bough]

Thanks! Sort of worked a similar thing out as well 🙂 Good to know I'm on the right track though. As for the timeline, is is possible to change a timeline's length outside of the timeline node itself? I have a 'day length' float I'd like to use to control the timeline lerp length 🙂

[fading wren]

Blue one - normal, yellow one -impact point. Question is, how additionally rotate impact point on 5 degrees out from normal ?

[indigo bough]

search for "Rotate Vector About Axis" and the axis is the hit location

[terse goblet]

around*

[indigo bough]

Ahh yeah, Around 😛

[fading wren]

and it will work out from normal ? direction of rotation is important

[stoic magnet]

@indigo bough afaik, you can only set the time within the length. So you can make a timeline with a length of 100seconds, set the start time at 20 seconds and just execute the last 80.

[indigo bough]

Angle Deg is the angle it will rotate

If you want to change the direction, you might have to rotate the Axis vector first, not sure about that

[indigo bough]

Ahh hmm, yeah was hoping I could just debug with different timeline lengths but I guess I'll have to keep going in there and adjusting the curve. Thank you though!

I guess I could have two timelines and switch them if a debug bool is set

[stoic magnet]

@indigo bough you could use a gate with a delay that turns the gate on and off

[fading wren]

i dont want make it manual, i want BP to understand, where it should rotate left, and where it should rotate right. is it possible ?

[indigo bough]

It's all just math. Anything is possible 🙂

[fading wren]

like impact normal situated left side from normal - turn left 5 degree

impact normal situated right side from normal - turn right 5 degree

[indigo bough]

Do an if <= or => on the dot

[fading wren]

but Dot product is absolute

is doesnt show - or +

[indigo bough]

It does

[fading wren]

0_o

how

?

automatically or like what ?

[indigo bough]

Use Print String on your dot output and test it from some extreme angles, and you'll get a negative result

But I still think you're over-complicating it. Did that article I sent not work?

Ricochet is very common in games, there are bound to be guides on how to set it up exactly

[fading wren]

i dont really need recochet

[indigo bough]

Ah

[fading wren]

i just want player turn to left on 5 degrees, if it was turned left, beforre hit the wall

and vice-versa

[fading wren]

oh i mean degrees, after acos

[loud cipher]

Anyone know why this highlighted image texture streches out in game?

[dark crow]

Not without seeing how you set up the layers

[fading wren]

is any way to get negative angle from Dot product ?

is it able return abs only ?

[sonic pine]

Hiho is there a way to Change the DataTable Row with an Integer?

[sonic pine]

I try to connect the NewLevel (after level up) with the RowName to Change the neededEXP until LvUp and add the Skillpoints.
In my Database are Lv 1-20, Needed EXP for every Lv and the SkillPoints which the Character will earn after Lv Up...

[woeful pelican]

This works in the editor, but not when I build and package the game. What could be causing this?

In the editor, the emissive gets changed as expected. But when packaged it seems static.

[golden raptor]

did you try with a base material set on your material instance creation?

[maiden wadi]

@woeful pelicanVery likely the display name. You should not rely on the name of actors for anything outside of debugging purposes.

[woeful pelican]

Yeah I was thinking that. Got a better idea then?

I'll try this first then the base material thing

Gonna double check if the branch is triggering at all first

[maiden wadi]

It depends. What is the use case? Are you just trying to turn the emissive on when a certain type overlaps? If so compare via classes.

[woeful pelican]

Thanks kira 🙃

Yeah I tried object comparing first, not class comparing. That explains some bits

[feral ice]

is there a node for an ai to start moving? Like after begin play start moving

[vapid ibex]

In 2d games there's a common effect that an object is opaque before player gets behind it, and then the object fades away, to make it easier for player to navigate or to reveal a secret path. How's best to implement this most versatilebly, if in my case it most often would be foremost walls of various buildings?

I mean, the basic implementation for one actor is easy - you just make a dynamic material with opacity variable and then just change it in a blueprint when it's hit via trace from player to the camera, but that's just one actor.

How to do it to chunks of walls in a level, which probably would each be unique and used only once in the entire game, so it's probably should be level designer-friendly?

Ideally It'd be an actor that will fade away everything that's parented to it in the world outliner - static meshes and other actors.

[gritty plover]

@feral ice AI Move To?

[feral ice]

not really what im after

the ai just keeps walking forward that what i want

[woeful pelican]

From my basic understanding of material theory, I think you can do something with material shader stuff and camera vectors. You got the ContentExamples project Installed?

[gritty plover]

Well then just get its forward vector and give it a target that's like a trillion meters forward.

[vapid ibex]

AIMoveTo (ActorPosition+GetForwardVector)?

[feral ice]

maybe i was thinking like add movment input but that may not work idk

[last abyss]

run ai, run

[vapid ibex]

If AI won't do anything much besides walking blindly in a straight line, you might not even need an AI for that

[vapid ibex]

I can install it, what should I look for?

[woeful pelican]

'Content Examples' in the marketplace, get that and create a project from it

Then you can load the level 'math_hall' and take a look at sector 2

[gritty plover]

Also hey, I've got this blueprint actor with a whole bunch of public variables.
Now, I plan on spawning this actor ingame, through other blueprints. Is there a way to set those variables as like "Inputs" or whatever? So that it's easier to set those variables through other blueprints, without having to manually set each one after spawning it?

[woeful pelican]

There's a basic example at the very end of the hall that uses the camera's vectors for material stuff.

You could probably use camera vectors to control a material mask thing

and only make part of a material translucent

The same project also has stuff about material properties in its own level

[last abyss]

yeah you gotta expose on spawn the variables, if thats what you mean

[gritty plover]

Not exactly what I mean.
I meant that I'll be spawning it through other blueprints, like so, and I wanted to know if there was an easy way to set all of its variables at once, rather than one by one. Sorta like how the inputs work in interfaces.

[open crypt]

So I'm done dicking around with the simple AI move to commands, can someone help me interpolate my characters max speed (I like the speed it is) and just use that to set it's location on tick - **the goal is to bruteforce to make the character run to a location and bypass the AI / navmesh entirely (this is a straight run so I don't need navigation or collision checks) **

[last abyss]

I think what you're looking for is expose on spawn, it makes it so the variables show up as pins whenever you create the node 'spawnactor' and select the specific class

you just have to make sure that you refresh the node after you compile the bp, because they won't show up until you do

[gritty plover]

Oh that's perfect! Thank you so much!

[vapid ibex]

Multiply character's run speed by tick delta, multiply forward vector by the result, add that to the character's position with "sweep" bool enabled.

[open crypt]

You, are probably a good person. Thank you.

[wicked shoal]

hey everyone i have a question regarding animation blueprints

I currently have set up a fully working vehicle with working suspension arms etc.

But i want to add a driver to this vehicle as part of the vehicle.
How would i go about adding the animations.
Can i do this in the existing vehicelAnimBP? or do i need to add a seperate animated mesh to the vehicle?

[open crypt]

probably spawn it in the vehicle as a child actor

[vapid ibex]

will work only for flat levels though.

[open crypt]

lol I was just about to ask

tried change step up height

no dice

set it to something ridulous

[wicked shoal]

hmm good call i didn't consider that. thank you! ill give it a try.

[vapid ibex]

If you're using actor movement component, then it might be possible to give it input or something

[open crypt]

What you want to do though, for sure, is to have the driver anim BP receive the SAME animation notifies that you have on your vehicles, for turning for example

[open crypt]

is there something else beyond step height?

[vapid ibex]

My example just bruteforcibly changes the position of the actor without care for anything else

[wicked shoal]

Is there a form of documentation on how to go about this?

[vapid ibex]

It's basically an illusion of movement

[open crypt]

So he can't step up, because character step up is using character movement component, which we are not

It's a real good illusion until it's not lol

but you gave me exactly what I asked for - I just have trouble with the AI movement nodes

[open crypt]

Look up Animation notifies - once you learn how to do a simple one, you use the "event Anim Notify" on your anim_BP - that you can use to change a simple bool, which you then have in your ANIM BP state machine transition rules - meaning it allows the state machine to literally change states to play a different animation

[vapid ibex]

You probably need something like this, only instead of getting inputs from InputAxis nodes it's on a tick and the input is with a constant 1.0 scale value:

[open crypt]

This is just an NPC runner

[vapid ibex]

If it uses character movement component then it shoud be able to step up the obstacles now.

[wicked shoal]

Thank you very much. got the documentation ill read into it 😄

[open crypt]

Highly suggest some of the youtube videos on this one too

[open crypt]

annnd I'm just going to fuck with the BT - there must be something deeply fundamental/backend about the behavior tree move to nodes versus the blueprint ones

[dark crow]

<@&213101288538374145> Sorry for tag but this is straight out phishing

[twin chasm]

Never be sorry about reporting a phishing bot

[manic smelt]

Anyone know if there is a way to reset all actors variables to the starting state. I see that AActor::Reset seems to do that but is there a way with blueprints?

[twin chasm]

Handling this shit is what we are here for :)

[icy matrix]

A despawn / respawn would be the fastest way to iterate on that, otherwise I think you'd have difficulty telling the editor what to reset to. It'd be best to have "default" variables that are read-only, and then variables you can initalize with those default values, change at runtime, and then run a "reset" function that sets the editable variables back to the default values from those default variables.

[devout tide]

Does anyone know of a good asset or tutorial for moving actors in game with arrows in the specific arrow axis like the editor does? Would like to see the vector math behind it

[pure marsh]

How do I make AI customers that line up like when you're waiting for a cashier to take your order?

I'm able to spawn them and make them follow a spline to the cashier

[winter garnet]

Hey guys, quick question. Do you know how to hide the parent's variables from the Editor?

Like these...

I don't remember what I did that they started showing up in my Blueprints. 😦

[drowsy anvil]

hello, I have a wall jump mechanic, where I want the character to turn around after jumping, but instead of that, the character jumps always to the same direction in the world (for example there is 4 walls and from each wall, he always jumps facing west, instead of facing the opposite direction of each wall)

hopefully that was clear enough, here is what I tried, what am I doing wrong?

[crimson pollen]

sup guys I need help with something. what im trying to do is a bit hard for me to explain as im sort of new with UE4

specifically what im trying to do is instead take a function in a functionBP and call it into my actor BP im wondering if its possible in the actor BP to call all functions from all function bps from a single folder without having to string them up manually? Example is like if you were doing an "all" file lookup in a batch it would look something like this "C:/Desktop/newfolder/*" and would be able to access all files in that folder. I want to do something similar in my actor BP

Partially the reason why I want to do this is because I want to make my actor moddable and people could just put extensions in its logic without having to edit the Actor BP

[tight schooner]

@crimson pollen I'm not sure if I can fully answer this question, but I can answer part of it and speculate on the rest. Basically all the classes you want to call functions on need a common interface so that your manager BP doesn't have to suss out class A from class B from class C. One example of an interface is a class hierarchy — if all the child classes share a parent class, your manager BP only has to cast to the parent class and call a parent function regardless of what it's dealing with. And each child class can override the parent function/event and do their own thing. That would provide the manager BP a common way to communicate with different classes.

Another example of an interface is a Blueprint Interface (BPI) which can work across class hierarchies. I'll leave that to you to look up. (BP Components can also serve as interfaces, which is a practice I only dipped my toe in so far.)

As far as scanning a folder and dynamically loading those assets go, I wouldn't know. I suspect "soft references" would be involved, which is UE4's workflow for loading individual assets through BP (e.g. skins).

[crimson pollen]

Basically the way I was thinking it is that they could just use that folder as a proxy to call their own bps while actor is called

and anything they need to add or overide can be in the files outside of the folder

so if there is multiple modders, all the mods can work instead of only 1

That was the thought process

[icy dragon]

Indeed.
If you want to have mod support, use the official UGC plugin or the Lua Machine plugin (both of which I used)

[crimson pollen]

ahh good ill check that out

you know what I have an idea

I think it will be possible to make an array of the files and then call them in the actor

because once the file is in UE4 you can call the function ofc

so it should be possible to make that an array if I just grab all of them if I make a standard for it

[icy dragon]

If you're making something like Clone Hero or osu, where levels are stored in a separate file, then that's doable.

Otherwise, if you want to have custom script mods, then UGC or something like Lua Machine, and load valid scripts in the game's Mods folder.

[blissful gull]

how do you play sound before a level change?

i spawned a sound before the change but it doesnt play during the change, it plays after it

[icy dragon]

Is it for music?

[blissful gull]

just a UI sound

[icy dragon]

Well, that would be basically the same as music.
You could do it within Game Instance, because it persists through level change.

[blissful gull]

i tried that and it doesnt seem to work

[icy dragon]

https://forums.unrealengine.com/t/audio-between-levels-possible-on-game-instance/126009/9

[dull sentinel]

Hello. I want to use Two bone IK /Bone Transform on both arms when using weapons, so that only curves and other calculations determine movement of the upper body/Weapon. This is a full-body FPS character. Right now, the IK arms are very much affected by the animations that are played, with and without blend per bone. Can I adjust, dampen and control the movements of the IK arms 100% with curves or will they always be affected by the animation being played? Is there a solution to keep the arms from being affected by the animations being played, or disable the upper body completely from spine_03?

[sonic pine]

Hiho is there a way to Trigger Database Row Name: "1" with the Level Integer ?

The mechanic should be like that:
Player level 1 -> Data table Row Name 1 if Player Level will be Level: 5 the Data Table Row Name should also switch to 5 to increase the Needed EXP

[burnt nest]

It is absolutely possible, though I do not know how to set it up. I know you can for example override a running animation with a weapon reload animation for just the arms, for example.

[dull sentinel]

Hi. That is possible with montages and slots, but my problem is the IK bones(arms) are following the base animation even if the upper body is set to not have an animation.

I want the upper body to be completely "dead", so that all movement of the IK arms is determined by curves and calculation.

[burnt nest]

Hmm. Try asking in #animation maybe. The people who hang around there might know. Of course Europe's asleep atm, so you'll have to hope america can help. 😄

[dull sentinel]

Yeah, I know. From Europe my self 😄

[burnt nest]

... Me too. Maybe game devs are an exception. 🙈

[dull sentinel]

hehe

[slender stream]

hi i get this error when im trying to package:

uathelper: packaging (windows (64-bit)): error: missing precompiled manifest for 'editorstyle'. this module was most likely not flagged for being included in a precompiled build - set 'precompilefortargets = precompiletargetstype.any;' in editorstyle.build.cs to override.

[burnt nest]

You're already asking in #packaging which seems to be the right spot, doesn't have much to do with blueprints. 🙂

[slender stream]

sorry about that, when you get no answer no matter where you ask, you start to get desperate 🙂

[burnt nest]

I know. Sometimes nobody online knows. It's also night time in Europe, so that doesn't help. 🙂

[sonic pine]

New level = 2 -> lavel->Name = None Thats normal too loose Values?

Whats wrong with this "2" the 1,2,3,4,5... in the dataatble are also Numbers saved as row Name so why i can change my "Int Number" to a "Name Number" any ideas?

[open crypt]

Anyone help me figure out how I got a double version of this actor? there is another one but it's not listed in the content broweser - I had a crash and I'm sure it is some temporary asset but I"m nto sure what to do

[sudden nimbus]

does your project have C++?

[dense citrus]

hey, i'm having issues figuring out 1 simple thing, and i need some help with it, so if someone wouldn't mind rubbing a braincell with me that'd be amazing plz and thx.

basically; i'm making a physics controller for my game for the player, and i want to do 1 specific thing;

limit the amt of speed a player can get just by running, while using a force.
with my blueprint an acceleration force of X is being applied every Y seconds, but they accelerate, so i want to figure out a way to sorta limit how fast they can go instead of just getting faster and faster without end

i guess basically just think of a vehicle with a throttle, but i wanna limit the speed instead of just nonstop nyoom

[sudden nimbus]

you'll need to have a per tick limiter for the velocity, or modify velocity directly instead of using Addforce so you can set a cap

[dense citrus]

okay, but my sorta issue is i'm having issues logicing it ou-

i may have just registered how to do it

one sec lel

[sudden nimbus]

sounds like it worked 🙂

[dense citrus]

it didn't lel

trying to get it, my main issue is i'm really fluent with vectors yet, so i'm trying to figure how to clamp a velocity heh

and i don't wanna waste someones time by explaining to be how multiplying vectors by an int works

so imma make a guess most likely to my detriment and hope it's fine lol

[long fulcrum]

i have a question where did yall learn blueprints

[dense citrus]

@long fulcrum that's a very broad topic that i think depends on who you are

how much computer logic do you understand?

like, do you know to code elsewhere, do you need help getting started? etc etc

assuming you have nothing, i reccomend looking up "how to do X" (x being what you wanna make/impliment into your game_

one of the first things i looked up was "how to make wall climbing in ue4" which led me to a guy named matthew palaje, who does really solid tutorials

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

this is the video i found

[long fulcrum]

thank you

[dense citrus]

then after him, i found dean ashford

copied a few of their tutorials

and after enough monkey see monkey do i got enough of what they understood into my brainhole

and at this point, i can use ue4 blueprints with next to no tutorial

so, i reccomend you follow one tutorial like that

follow another

try to make those 2 mechanics work within the same blueprint, then keep going

that shoudl help you learn enough of what you're doing to get grounded

[long fulcrum]

so pretty much follow a bunch of random tutorials and than take what i learn from them and integrate them into my own gaem

[dense citrus]

https://www.youtube.com/channel/UCAaWnOJ4iFSQluBVNS2d-Ew

[long fulcrum]

game

[dense citrus]

basically

like, unless you're taking desognated classes to learn fundimental computer logic, i honestly have 0 idea how anyone would learn

so i'd say follow tutorials to get your feet wet

then try do a mechanic WITHOUT a tutorial

(using one if you need it tho_

then sorta just keep pushing further and further

it's sorta like how learning a language, you're sorta just constantly like what's this, what's that, what's this?

like, unless someone has a specific structured class, it's hard to learn imo

so i think that my way (obi i'm biast) is one of the best ways to get from a to b without paying someone or getting compeatly lost in the docs

(ngl, ue4 documentations is kinda ass aswell)

sorry to talk your ear off, but yeh heh

[sudden nimbus]

assuming this is not really fluent with vectors yet, and thats cool, its harder than it seems. For clamping a vector you are talking about clamping it's length to a certain length. A vector that is multiplied by a number is the length it had times the length of the number you give it. You can "normalize" a vector to set its length to 1. If you read your actor's velocity as a vector, check if its length is greater than your "max velocity", and if so normalize the vector (so its length is 1), multiply it by your "max velocity", then set your velocity to that

this way you are always checking how "hard" your character is pushed, and limiting how hard it is pushed based on your rules

still, you might find that this gets complicated

and it is often reasonable to handle this outside of physics simulation

in fact, Character Movement is doing this -- it is not applying force to the physics body

Obligatory question, what didn't work for you in Character Movement, iirc it can handle this?

[dense citrus]

alrighty heh, thanks for attempting, and i think i get that to some degreee, imma ask you if this will work, and see if i'm right (if you don't mind)

what i'm thinking is i take the vector, remove the z (because the z doesn't really need to be throttled in this instance)
and adding the x and y, then what i'm i'm doing to do is basically make sure that value is below the specified max, and if it is, then i limit it to the max

or to sorta try show it:

i explained that terribly

i mean liek this;

[sudden nimbus]

you don't need to separate X, Y and Z :-D

just use Length node off vector :-)

if you want to exclude Z for limiting then multiply your vector times 1,1,0

so that Z is zero

but when you set it while limiting that will be complicated

because you need to limit only on X and Y-- if you don't explicitly need Z to remain while limiting, just do it with all components intact

things like Jump can get hard if you don't factor out Z but again, why not just use character movement component?

[dense citrus]

@sudden nimbus so, the reason why, is my fundimental mechanics are physicsbased

a lot of sliding, momentum carrying, etc etc

like, literal ramps

and if you've tried to do that with the character component, you will realize how jank it is lel

without faking the physics*

[sudden nimbus]

alright that's fair, then you'll want to handle X and Y limiting alone if you have jump, but yeah you can just leave the Z alone when you set it

[dense citrus]

this is what i've built for now

i thiiiiink it's going to work

idk super well lel

[sudden nimbus]

yeah just get length of XY vector, scale it, and then apply result to X and Y retaining Z

screenshot too small on mobile, not your fault, Discord's :-)

[dense citrus]

lel, i think you can zoom can't ya?

but ill zoom in for ya

[candid nest]

hey can anybody plz fix my left hand my hand is not properly attaching to gun i want it to attach properly to gun

[dense citrus]

hopefully that is better heh

for context, the vector comming in off screen is just the cameras forward vector

and the white is just a trigger that triggers the physics addition every .3 seconds

it was wrong xwx

and @candid nest kinda busy, but i think the bone position might be wrong, but that's only my guess heh

[sudden nimbus]

lol this is 100% scale -- on desktop i can zoom in but yeah this is tiny

[dense citrus]

oh, that looks a lot worse on your end lel

yeh, really terrible lol

[candid nest]

i tried to do it in many ways in past 2 days i watched many tutorials but didnt work for me

[sudden nimbus]

OK so Forward Vector is not the velocity

that will always be a vector of size 1 pointing down the X axis

more properly Get Physics Linear Velocity and Set Physics Linear Velocity on your primary collision component is ideal

often Root but depends

[dense citrus]

@sudden nimbus yee, i ment it's multiplying the velocity i want by the cameras rotation to move that way

it's the movement, not the clamping heh

[sudden nimbus]

yeah but regardless the clamping is happening on a "Forward Vector"

oh wait i see what you mean, its being added on top of forward

i think this is combining a few different things into one and its super unclear how you will use it since it just prints string

do you mean it will feed into Set Physics Linear Velocity at the end there thats just setting zero

if so, then you will need to factor in your current velocity not just entirely override it. If you are going to do that why not just use character movement

wait, gut check here, you know that physics is not the same as collision right

that you can have other physics stuff impacted by your character which is controlled by character movment, and have those be physically driven?

[dense citrus]

so, i think there's sorta a miscommunication heh, basically to tackle this short ways, yes, the mechanics of the character is more akin to a vehicle then a 2d platforming character

basically, what i need long and short is for the idea of this to work

but this, or any brute forced version don't seem ot be working

[sudden nimbus]

the screenshots above don't factor in the speed of the vehicle as it currently is

[dense citrus]

okay, well, with that current image, is what the updated velocity is going to be, which is the point/issue here

effectively, i want to limit it within that range, and it's not, weither i use that, or logic it out, something isn't making sense

[sudden nimbus]

I'm repeating myself here because I think it's not clicking. Get Forward Vector will always be of length 1, even when there's no input or velocity or movement or whatever

it will never change length

[dense citrus]

yes, the vector i have is custom set

maybe i'm missunderstanding

to tldr the order, i use a "get physics linear velocity" and set that to a vector variable

i remove the z, add the 2 together, get the vector as a float

then i get the camera forward vector, and multiply that by the "thrust" vector, which gives me a "step"

removing the z because i don't want a plane

[sudden nimbus]

did I miss a screenshot here, I see no get physics linear velocity

[dense citrus]

i said offscreen it did lel

the big blue node to the far left is the get physics linear velocity

then the set velocity (vector)

then set XY velocity (float)

biiiiiiiig sklip

then the camera stuff as i said

then poomf

my issue is, the only is that last node, which is supposed ot be the clamp, not limiting the vector

atleast not how i think it is

[sudden nimbus]

just wanted to illustrate what you are sharing

its super hard to read anything tbh- it sucks but the engine doesnt give you tools for this

[dense citrus]

is this better or more discord compression?

[sudden nimbus]

why this?

what is the meaning of X+Y

thats not the length of the XY vector if you are wondering

[dense citrus]

to basically remove the z from the movement so if the character is falling/jumping it is not factored in

[sudden nimbus]

instead, take the vector, multiply by X=1, Y=1, Z=0, and get Length on it

see above

[dense citrus]

isn't that just the same as setting z to zero like i did?

[sudden nimbus]

you are adding X and Y components together, this is a very different thing that really doesnt have a defined meaning as best i can tell

you should create a vector where Z is not a factor, and get its length

so you are missing some squares and some square roots 🙂

[dense citrus]

okay, i maybe get your point, but isn't this basically what you're telling be to do;

like, i guess i'm fundimentally missing why setting z to 0 is not the same as multiplying it by 0

[sudden nimbus]

its not different

but you arent using VectorLength

adding X+Y is not the length of the vector, the length of the vector is sqrt(X^2 + Y^2)

[dense citrus]

okay, i think i'm getting the point

[sudden nimbus]

VectorLength does it for you

🙂

[dense citrus]

this is what i got lel

so how would i limit the velocity from here?

[candid nest]

now can i ask if the discussion is over

[dense citrus]

i don't think so unless they're tired of me

[candid nest]

okay

[dense citrus]

i also offered my offhand idea earlier, not sure if that helps

[candid nest]

if u offerd me i replied that i used it before but it didnt work

this is the error

i used fabrik and other method too but didnt work

my hand get corrected when it shoots but not when he hold gun idle or walk

[dense citrus]

can't you just adjust the arm position of animation and save that, and wouldn't that fix the issue?

[candid nest]

yeah i tried to do that too but my arms automaticaly back to this position

[dense citrus]

id you delete the old keyframes?

[candid nest]

idont know

i will try to do this but what if i use diffrent gun like ak or other rifle which uses same animation dosent it create a problem for them

thanks man i finded a fix

[fleet sinew]

How can i assign value(s) to object?

[dense citrus]

@fleet sinew define what you mean a bit more specifically plz

[fleet sinew]

I'm trying to make 2d strategy game and while trying to insert values like income, resource production to map tiles I found out that I can't just add integer to an object

[tight schooner]

Doing it in GameInstance is a way, but nowadays you can check "persist across level transition"...

[blissful gull]

I just can't get it to fire off before the level transition

Huh

[tight schooner]

I'm not an expert at it either. Have you tried

1. playing the sound without the level load to make sure that part even works
2. playing the sound and like 1 frame later calling Open Level instead of doing it on the same frame

[dense citrus]

@fleet sinew so you want to create a number you can save, edit, and access later?

[fleet sinew]

yea right sorry for bad English

[dense citrus]

it's fine, you at your pc now?

https://docs.unrealengine.com/4.26/en-US/ProgrammingAndScripting/Blueprints/UserGuide/Variables/

this covers basically 90% of what you need to know lel

[fleet sinew]

Oh okay, thank you very much:)

[dense citrus]

np, glhf and happy coding uwu

[willow phoenix]

i copied my "thirdpersonmap" from the folder "maps" and my thirdpersoncharacter into another folder, now my character wont spawn when i start the map. where do i find the "defaul" the spawn logic? gamemode?

[crimson swan]

that sounds a little like your current map might not have a spawn point?

[willow phoenix]

it got a spawn point, thats why im so irritated

[crimson swan]

is your default pawn class set up correctly in project settings?

[sonic pine]

Hiho i have a Problem with my Data Table. How i can Connect an Integer Value with the Data Table Row to get a new Integer?

I have 2 functioncs to increase the PlayerLevel, NeededEXP for Next PlayerLevel and the SkillPoints.

Current EXP > NeededEXP = Level 1+1
Now i try to get the Level "2" to trigger the Data Table Row Name "2" but the Datatable will not Change the Row automaticly ...
Maybe someone have an idea how to fix that?

Earned_EXP Fuction

ths was my latest test

The Increase Function for neededEXP and SkillPoints

Is there a way to call Gat Datatable ID?
The ID is an Integer (Row Index), so without Row Name it should work...

[candid nest]

hey i got a very strange error my character cant crouch while he is not equipping gun when he equip gun he can crouch also when i throw gun while i am crouch my character plays the animation that i use for unequip gun crouching can anybody here tell me the reason for this

[supple night]

There is actually a issue right now with exactly that

https://unreal-engine-issues.herokuapp.com/issue/UE-86825

[fleet cedar]

I'm trying to create a digging mechanic in my game... I've done something for now with displacement but I understand there's no collision update from displaced materials. Anyone know of a way I could bypass this issue perhaps?

[scarlet timber]

no you have to loop through it

in BP at least its like that

[fleet cedar]

From marketplace?

Do you have experience with one you might recommend?

[scarlet timber]

there is only one

https://voxelplugin.com/

[fleet cedar]

oh

I thought you were saying get a voxel plugin

sorry

The reviews aren't great hmm

[fleet cedar]

odd

I was looking at the wrong one

apparently there is more than one, maybe this one's a knockoff

[scarlet timber]

https://www.unrealengine.com/marketplace/en-US/product/voxel-plugin-free/

[fleet cedar]

Got it thank you!

[scarlet timber]

pro version is 5 star 211 reviews

that's like a dream for a marketplace publisher

[fleet cedar]

Amazing... and free too. the one with bad reviews was 50

You saved my butt thanks guys! Was dreaming up ridiculous solutions...

[scarlet timber]

I recommend doing some research before using

see if they support your target platform

[sonic pine]

In which part?

[scarlet timber]

by default index is row name

so if you want it to be a number you have to either set the row name to that number or you should add a int variable for numeric index

and loop through it like this

[sonic pine]

My Row Name is a Number ^^

My CSV Data have ID: 1 2 3 4..., Level 1 2 3 4..., NeededEXP: 8 14 17 23..., and SkillPoints: 1 2 3 4...
So each Row in the Datatable includes Integer only NeededEXP is a Float variable ^^

[scarlet timber]

then what is the problem it should work!

[sonic pine]

My Problem is to understand why the Row Name (Name) know the Level (integer) after LevelUp

[scarlet timber]

doesn't this work?

[sonic pine]

After Level Up The Row Name have to Change automaticly from Row 1 to Row 2 but if i cant put the Integer level into the Row Number how does the Datatable should Know my Level?

I did it like this xD

so i dont need the For each loop?

Bcause the ArrayElement havnt any connection now

[scarlet timber]

no

[sonic pine]

Ok so i have started to ask xD

[scarlet timber]

add a custom event call it "on level Up" and call it when exp reaches desired amount , in that event set level to (level+1) then feed it to get data table row

[sonic pine]

i did

[scarlet timber]

yeah I did'nt understand your question

[scarlet timber]

no not like this , you make a function first to earn exp and if earned exp + current exp was higher than needed exp you call another event called level up

[sonic pine]

ok Thanks ^^
last step i have to fix my EXP i dont know why i cant get exp xD

like that?

maybe my triggerbox is wrong

[sonic pine]

Thanks for help ^^

[candid nest]

hey can anybody help me

i cant fix this i tried almost every tutorial

[scarlet timber]

#animation ?

[sonic pine]

i think his problem is the hand isnt contact the weapon?

[candid nest]

yes

[sonic pine]

whe weapon is small i think ^^

[candid nest]

no it is ok

due to character mesh it looks quit smal

[gentle urchin]

Honestly looks like the wrong scale

Finger wont even fit

[candid nest]

it gots fit as i am using ue 4 skeleton i dont want to be accurate but it looks wierd when i play the gap is visible

[sonic pine]

Ok i dont know whats wrong with my EXP Bar...
I have Pressed F to get 5 EXP of a test of EXP Bar and Level Up System but nothing happend

[last abyss]

you should show the binding (if it is using a binding) of the progress bar

[sonic pine]

Yes i have changed back to binding

but the binding isnt complicated

But i Think my problem is the Earn EXP Function

[scarlet timber]

current exp / need exp

[sonic pine]

i have change it 5 seconds ago

i have only changed Need and Current to test

But also the Earn EXP should be correct...

Why the EXP bar will not get filled ^^

My EXP button

ok my mistake xD

I have set needed exp to 0 because the needed exp should come from the Data Table

The needed EXP will not be updated by Data Table so taht was my question 20 minutes ago. How can i trigger the Data Table Row (name) with my Level (int) xD

[last abyss]

you are already doing that here

[formal dagger]

Hello there, i'm stucked again. So... my bad, the saving system is definilty one of the thing i've should done first but... still learning. Anyway, i've got several animals with differents stats (meaning variables with diff values), they're all from the same parent "Tamed_animal" and i have no clue how to save them in a array "saved tamed animals" and then load them with their good stats. It's a lot of array and i'm lost. Any clue ?

[sonic pine]

I did xD

[last abyss]

you could use a struct to save multiple variables

and then have 1 array of that struct type to save all your tamed animals in

[formal dagger]

oh boy i gonna need to find some exemples but i'll try this, thx pal

[sonic pine]

This is my Exp Event
if i press E i will get 5 EXP (checked)
If current EXP bigger NeededEXP = Level UP (checked)
Level UP 1+1=2 set Data table Row from 1 to 2 give out Skillpoints and Update NeededEXP (False)

[last abyss]

and where are u calling set lv and exp?

[sonic pine]

In the IncreaseLV&SkillPoint function

it only a set because the Needed EXP and Skillpoint is fix in Data table

so i dont need to calculate anything

[last abyss]

right, I mean where are u calling the event called 'Set Lv and EXP' that is in your event graph, that calls the 'Level Up' event. because so far all i'm seeing is you setting variables in your functions, but I haven't seen where you call either of the 2 events in your graph.

[sonic pine]

ah

like that

Actually i havnt any trigger to earn exp no monsters or quests

so i can trigger the event only about the get exp key

Thank you its working ^^

[tidal marlin]

hello. How i can change navigation after start game? (without runtime navmesh, pls)

[slim knot]

Hi I'm new in here :D, can I ask about communication between Widget and Level Blueprint in here? Seems like this is the right place to ask this or should I ask in UI umg?

[open crypt]

I have a box collision, I want to trigger actors that are facing towards it - what type of forward vector comparison do I need to be able to compare the two objects?

mind you

they will be surrounding the box, but some are facing away from it

Actual context is a highway in a city, with the box being an intersection, I want to get the cars that are facing towards that intersection (without drawing specific volumes for the lanes)

the forward vector comparison would be more procedural/flexible ...and basically less work

Rather, it's not going to be forward vector in case of the center of the intersection I guess I need to find the inverse of look at function

Something like comparing the two look at rotations and if the rotators themselves are within a certain range

[dark crow]

Dot Product is to check if something is facing another

[glossy bane]

Is there something inherently different when trying to cast to a GameMode BP in order to use a reference from there into another BP? I keep getting "Accessed None" errors, and I have checked that the Obj. Ref. I'm trying to access gets created and set with breakpoints - but my other BP can't access it for some reason

[fleet cedar]

I'm trying to get my objects to align to trace hit normal, but they're not rotated correctly, any ideas?

I did rotation from Xvector

[last abyss]

the only difference is in multiplayer where gamemode only exists on server

[fleet cedar]

nvm they were just offset 90 degrees

[glossy bane]

I see, since I have no multiplayer then it shouldn't be a problem I guess. Will keep trying to find out why I'm getting errors

[open crypt]

Is a box extent size unreal units? Thats how i figure how the actual distance of a box since I cant do it with scale?

[slim knot]

Is this a possible thing to do?

I mean is it possible for the Widget to communicate and giving input to objects in Level Blueprint?

[open crypt]

Yes, but you need an event dispatcher

[slim knot]

Okay, so how do I do that?

Is it like this?

Because I'm still confused on how to use this nodes properly

[weak grove]

hey, i am trying to launch my character while the root motion is enabled but it fails everytime so i checked on unreal forums and get to know that launch character doesnt work with root motion enabled. please help me how to do it without disabling the root motion

[willow phoenix]

sry for beeing late, problem solved itself. not sure why :8

[weak grove]

anyone?

[ivory brook]

I'm working through a tutorial online and in the screen shot is this node.

I understand that the output is a vector array, but I can't find a node that has the input as well as the output and it doesn't explain it in the tut

does anyone know what it is?

[burnt canyon]

Thats just accessing the targets public variables

[ivory brook]

I just called for a get variable off of the blue return and it came up

I was working backwards on that bit, but that seems like a pretty handy thing to know

[tight schooner]

Yeah, the blue thing is a reference to an actor or otherwise object that exists in the game world. Once you have that reference, you can get/set variables, call functions/events on it, etc

You should look up general information on "blueprint communication" to learn more about it

[ivory brook]

the tutorial is for drawing splines mid game for a character navigation method based on where the mouse is, I'm hoping to find a specific actor within a radius of the player and use the pathway for an actor with a ribbon attached.

I think I'm finally getting there.

on a different note, I got into this on a bet, but I'm genuinely really enjoying the whole thing, making stuff in UE feels like a puzzle game in and of itself

[golden raptor]

hey all I"m using the base ThirdPersonCharacter, and I have enabled 'Use Controller Rotation Yaw' to lock the camera's rotation. However, I've noticed that when I back up, my character turns slightly to the right or the left.. any suggestions to fix this?

[last abyss]

the king of pop has returned! 😅

[golden raptor]

lol.. yeah I need to add some different animations.. but I wanna make sure the basics are working before I jump into all that

[faint pasture]

@ivory brook That's just accessing a vector array variable on Target.

[glossy bane]

Anyone that can advise on a way to make the value of a float dependent on a different float variable? For example for the value of the float controlling the speed of a projectile to increase/decrease based on the increase or decrease of the 2nd float?

[faint pasture]

Depends. You can calculate it every time you need it, or use a repnotify if it's a networked setup, or make a function (UpdateFloat1) which also updates float 2

[glossy bane]

The idea was to have it connected to a tick that would check each x second if var A has increased/decreased and update var B based on that. Its not networked its only singleplayer, I had a solution that was taking a snapshot of the first var and increasing the second var but it proved to not work well at all.

[faint pasture]

What changes A?

[glossy bane]

If float A is a character's movement speed - and it increases, I want float B which is a projectile movement to increase, and vice versa

[faint pasture]

Do you want to update already flying projectiles or just projectiles that are spawned while at that speed?

[glossy bane]

I want to update a projectile that is already spawned so it changes it's speed dynamically

[faint pasture]

For something like this I would check on tick, as you would expect it to change quite often

Projectile just has a reference to its owning character, and checks its velocity every frame

[glossy bane]

Yeah I just cant seem to figure out how to make it in blueprints

[glossy bane]

Thats what I was thinking aswell

[faint pasture]

Make MyOeningCharacter a reference on the projectile, set it on spawn.

Although they're already is a instigator variable which is a pawn, I would probably use that then you don't need to do anything weird or do any casting or make a custom variable etc. Just get instigator, get velocity

Make sure you set instigator when spawning the projectile though

[glossy bane]

I'm going to try, thanks for the help

[elfin gale]

Does anyone know of a video for Unreal engine blueprint on how to put stars in the daytime?

[fleet cedar]

I think you can do that with the sky BP

How can I access components created in the construction script? I tried to put them in an array but it wasn't letting me access them in the game. Also tried parenting them to a component at creation so that I could get them but that didn't seem to work either (unless I just did it wrong)

[rancid quartz]

Hello, I have a vector math and actor attachment question.

I'd like to get the forward vector each second of an actor that is attached to a rotating parent actor.

It seems running GetActorLocation on the child and GetForwardVector is not returning the value I need.

If anyone knows the solution, I'd be grateful for the advice.

Cheers.

[fleet cedar]

It should do what you're after

Is your child object definitely rotated correctly?

Is it rotated to face forward?

[rancid quartz]

Thanks for responding, Slamjam. My GetForwardVector operation works correctly when I don't attach the actor, but after attachment, it's off. I keep the relative rotation on attachment so I think the child is rotated correctly.

I figure I probably have to find the difference between the child and parent's rotations and do a calculation of some kind but I'm not sure.

[fleet cedar]

I would keep the world rotation

Keeping relative is more likely to screw you by offsetting it

world will ensure it stays facing where it was

[open crypt]

Is there not a component for Get Dot Product?

I know I could just spawn an actor at the center point and use that, but still

[fleet cedar]

there's a 'dot' node

is that what you mean?

[open crypt]

yeah, it's just two vectors right?

while it probably won't matter, I was hoping to just use the horzontal one

[fleet cedar]

sorry not sure, never used the horizontal one

[rancid quartz]

Thanks, Slamjam, I'll try what you said about the relative vs world attachment rotation.

[open crypt]

Can someone confirm for me that box extent is the same thing as the distance a box takes up?

[fleet cedar]

it's not

it's the Box Radius

So it's probably half of it's size in x,y,z (1/4 of the total volume)

[simple moss]

how can I show return value of GetActorLocation into x,y,z instead of just vector3?

[bitter star]

What do you need to make a bp work in sequencer? You can t use a tick or event begin play, can you?

[fleet cedar]

create a "break vector" node

[simple moss]

thx

[fleet cedar]

I would create a custom event and fire it in sequencer

Tick events should work fine

[grim quiver]

I am working on a top down project and I have my character follow my cursor but I want to make it so my characters head follows the cursor till its over 180 degrees (or 90 if you count looking straight ahead at 0) and then turns the whole body till its face my cursor head on. Any vidoes or tutorials I can run through that should show me how to do this or something akin to it?

[ivory brook]

Would someone be able to explain why this blueprint stops at the "for each loop" node?

if I trigger the input while playing, I get the error below

[frigid anvil]

Do you have a nav mesh bounds volume in your level? It seems the Find Path to Location synchronously is not returning any path points @ivory brook

[open crypt]

Would I just need to double this?

[ivory brook]

I don't have any nav meshes, I'll try adding one now quickly.

the goal is to make the spline between the player and a specific mesh type throughout the environment within a set distance of the player. would I need a nav mesh that spans the entire environment if that works?

I hope that makes sense, I'm real tired right now

[frigid anvil]

If I remember correctly, the Find Path to Location synchronously requires the nav mesh volume to find a path.

[open crypt]

Just put one giant nav mesh down and put modifiers on it where you need to block things

[fleet cedar]

yeah exactly, double in all 3 directions, can be weird to then offset it to get it in the right place... I'm dealing with this as we speak

[ivory brook]

the nav mesh has done it, thank you @frigid anvil @open crypt

I'll try to make the spline visible in game tomorrow so I can see how the path looks, but everything I've done today has almost got me past something that I've been trying to figure out since Tuesday

[faint pasture]

@rancid quartz get the forward Vector of whichever component you want the forward Vector of, not the actor forward vector. After forward Vector will always be the forward Vector of the root component

[ivory brook]

sorry, last thing. can the Find Path to Location synchronously node find a path through 3D space? or is it just on the ground?

[frigid anvil]

I recommend looking up some info about nav mesh. It works in 3D space, but maybe a different solution than nav mesh would be better for your use case?
Press P in your viewport to see the nav mesh. The green area is where the nav mesh will work

[ivory brook]

I just got a bit worried because I've only used a nav mesh once before to set up an NPC that wondered around aimlessly so I thought it may be just for navigating on the floor in a panic.

I'm going to go to bed now, my little monkey brain is hurting from all the thinking

[vapid ibex]

Is there a way to lerp two values based on a custom curve, instead of one of the preprogrammed falloffs?

[open crypt]

ummm...probably

[open crypt]

I'm pretty sure I'm just remember how to do it - you literally make a custom curve

[icy dragon]

Timeline node.

[vapid ibex]

I don't need to change a variable smoothly over time, I want to change it based on an float alpha (in this specific instance - to reduce damage done by the projectile based on the normalized distance it had traveled)

[valid kelp]

if you just want a simple math curve you can always put a pow on the alpha or the ouput for the lerp, or if you want point by point control you can use a curve asset

[open crypt]

or a 2d vector

[white linden]

Can a blueprint not have Object as a parent class? I'm using 4.5.1, just for ARK compat, and I'm pretty sure I was able to create blueprints with Object as the parent class. After I reformatted my PC and reinstalled the editor, my blueprints are having issues loading, and if I try to create derived blueprints from them, I get a warning like "not an acceptable base class"

"invalid class with which to make a blueprint"

Oh.. weird... I can make a blueprint that has Object as a base, "ObjectParent", but I can't create a second blueprint that has "ObjectParent" as a base

[stoic palm]

One message removed from a suspended account.

[proud sable]

Is there any way I can pass through a boolean through the "AnyDamage" event?

I have an ability that can crit, and the damage calculation works fine. I'd like the damaged actor's damage text widget to display differently if the hit was critical, and the easiest way to do this would be the pass the "IsCrit" boolean from the damaging ability through the AnyDamage node, if that were possible.

I'm guessing I can do this with the damage type pin, but I haven't been able to figure out how to use it properly as the "Apply Damage" node takes a DamageType Class input, and the "AnyDamage" node outputs a DamageType object. The way I'm currently doing it is by having a "[Type]Crit" variant for each damage type, then searching the display name for "Crit" which seems really stupid and currently isn't consistently showing the critical text variant.

[sudden nimbus]

you're on the right track, you should be able to subclass DamageType and add a "Crit" field to it, then cast the DamageType you get out of AnyDamage to your subclass

oh wait looks like the "Apply Damage" takes the class though

[proud sable]

Yeah that's where I was confused, Class goes in and Object comes out, so I wasn't sure how to properly pass the information through

I've gotten this far without having to references classes directly so I wasn't sure how to manage the pins in this case 😅

[sudden nimbus]

yeah it wont work that way-- you could spawn an actor to carry this information and destroy it after the damage is spawned (or perhaps have a pool of such objects)--- other than that, the "crit" DamageType workaround you've got [isn't terrible]

for the actor thing youd use this

of course you can just put some information onto the actor being damaged, or the actor doing the damage, but of course it would be a race condition or wouldnt work

I do want to say, note that the built in Damage system is being removed in UE5

[proud sable]

Yeah, I was mostly using it out of "convenience" which was fine up until now. It's just a bit of a weird roadblock right now

I wish we could just add an input+output pin for booleans to the default events to pass through some extra information

[sudden nimbus]

Gameplay Ability System is generally the upgrade path, but it requires a small bit of C++ boilerplate to get started, and has a fairly steep learning curve

still, theres tons of community docs in #gameplay-ability-system that helps a lot

[sudden nimbus]

you could just have a base class for all your characters that has your own "Damage" custom event on it

set it up however you want

or use Blueprint Interfaces

and you dont even need the common base class

[proud sable]

Haha yeah I've been recommended to use GAS quite a lot when I've had issues with the default system. I looked into it when I was a few days into UE4 and got overwhelmed, I should really revisit it now that I have a bit more experience.

[sudden nimbus]

yeah-- its definitely a lot 🙂 but its very powerful

[proud sable]

I'll look into interfaces for this, it's something I haven't used yet but have been meaning to learn more about

[sudden nimbus]

yeah you could make a Damageable interface that has a "Receive Damage" method defined on it, then you just use Class Settings -> Implemented Interfaces to add it to a blueprint actor, and you can just call Receive Damage on that or any actor (even if it doesnt implement the interface, it will just be ignored then). And you can test if an actor implements the interface if you need to as well

[proud sable]

Thanks as always Rez 🙂 I'll look into this approach

[sudden nimbus]

np!

[faint pasture]

That interface already exists and is built in

[sudden nimbus]

i think you are thinking of the AnyDamage functionality right?

[proud sable]

Got it set up, it works perfectly! I expected interfaces to have a steeper learning curve for some reason

The same issue as before is still there but it should be easier to diagnose now. Essentially when a damaging ability is spawned I check if the Critical Chance is higher than a random float between 1-100. If so, set "crit" to "true" and multiply the damage variable by the critical damage multiplier.

The damage side of it seems to work correctly, but the "crit" variable seems out of sync. Is there a smarter way to do this?

The print log here is the damage (20, on crit x2) and the crit variable state. For some reason the non-crit damage is occasionally marked as a crit when it shouldn't be, and vice versa

[sudden nimbus]

whats the code for determining crit=true/false ?

[proud sable]

This is the macro for it, #10 is the crit chance and #11 is the multiplier, Value 1 is the base damage which is already set

[sudden nimbus]

its because the random float in range is happening twice here

the blueprint edge value doesnt get stored the first time it runs

so its quite "random" whether they will line up or not 😛

fixing it in a macro would be tricky

[proud sable]

Hmm, how would I work around that? If I set the float value at BeginPlay then compare that variable in the macro would it work?

The macro isn't actually needed, I should have just collapsed the nodes 😅

[sudden nimbus]

oh if macro isnt needed and this is just in a function, then Promote To Local on the boolean value right after the >

and then use that to do your Select, and return the promoted local

you could also have a macro that takes in the base multiplier, critical multiplier, the base damage and whether its critical and output both the critical boolean and the final value boolean for instance

and move the random float in range out of the macro itself

random float in range is Pure but of course it really isnt, so it gets confusing

actually technically passing in an edge from Random Float in Range into a macro without first storing it will have the same issue cause macros are just plopped into the graph as if you were collapsing nodes

main point is to get the result of the random check stored somewhere so you can reference it without recalculating it inadvertently 🙂

[proud sable]

I never would've figured this out on my own, thank you! I moved the nodes into the eventgraph to test, set it at beginplay and referenced it later and it works perfectly 😄

[sudden nimbus]

yeah the "stuff gets re-evaluated" nature of pure nodes can be really confusing

typically pure should only be used if the resulting values are always the same, but its convenient, and Random shows that epic likes convenience too :-)

[proud sable]

Hah, for some reason I assumed that "Random float in range from stream" was the pure version, and the non-stream version wouldn't be re-evaluated by default

Not sure how that would actually work, but now I know 😄

[sudden nimbus]

yeah any time there's not an exec pin on it, it can be called again at the compiler's discretion. Doesn't mean it will but you wouldn't be able to predict it

[true valve]

How to get the character info when using a projectile in the FP template?

[sudden nimbus]

not familiar with the first person template, but typically the projectile will be assigned an Instigator, which is the actor that fired it

[true valve]

So I have Event Hit in the projectile BP

Yea Get Instigator thanks

[odd kiln]

Hi all I have a problem

I change camera from TPS to FPS

Both have a crosshair in middle of screen

But when I change the camera in game, it does not aiming at the same location

Because my TPS camera is in the air, above the character and my FPS camera is on the head of the character

so when I change, the middle of screen seems to change so the crosshair does not point at the same location

but I need it to be at the same location, like a zoom

[white sail]

Hello, I am having a problem getting a reference to self for my world map and setting it to my movement state. Giving me a Self Object reference is not compatible with player controller reference.

[sudden nimbus]

you are presumably in a Character class, use Get Controller to get the controller of that character and cast it to Player Controller, assuming its controlled by the player

[white sail]

I originally used get player controller and that didnt work

I need to cast it how so?

[sudden nimbus]

"Get Controller" on your local actor will give you a Controller instance

Player Controller is a subclass of Controller

Get Player Controller (index 0) will give you the 0th index player controller in the game

Nonetheless, I dont know what Quest Map Manager is and why it needs the controller anyway

so i dont know what "that didnt work" means

[white sail]

Quest map is a blueprint from ue4 store that I used so I didn't have to spend hours creating a world map. The didnt' work was me putting in the get player controller index as is the last screen shot

[sudden nimbus]

what didnt work after that?

[white sail]

The world map didn't come up correctly. It enabled my mouse and opened up an invisible ui I assume

All I could do is move my mouse around a bit

[sudden nimbus]

this is single player right?

[white sail]

Yes

[sudden nimbus]

yeah then i would imagine what you have with Get Player Controller would work

must be something about how you're supposed to hook it up, maybe double check the docs that come with the map system

[white sail]

The game doesnt crash but once I exit the preview I get a lot of Blueprint Runtime Errors and a SetInputMode_GameandUI expects a valid player controller error

[sudden nimbus]

sounds like Get Player Controller returns null

[white sail]

Yeah

Im watching a youtube video that came with the documentation and he uses a self representation

[sudden nimbus]

it is certainly possible for that to happen, but shouldnt be the case if you are using one of the regular templates

[white sail]

Im gonna try with the third person template fresh start and see what happens

From the level demo given as well they used a reference to self as well

[sudden nimbus]

sounds like they put it in the Player Controller then

you can handle input events in either player controller or player character

[white sail]

Im gonna try to do some work around stuff with the demo level

[sudden nimbus]

but it should work the same either way- if the demo level works then check the Maps & Modes section of your Project Settings versus the Game Mode Overrides section of the World Settings on that demo level

sounds like theres a difference in what playercontroller / playercharacter / gamemode classes your expecting

your own level has these overrides as well, but if you didnt edit it than its deferring to project settings

[white sail]

Ill give it a look

Thank you

[worthy carbon]

Do you need a dedicated server to setup mulitplayer in ue4?

[sudden nimbus]

generally yes but #multiplayer

[slim knot]

Hi, can someone tell me what object should I connect to the Cast To?

[craggy lava]

is this the right way to get pawn reference as a target if the pawn is a Sedan blueprint and not a third or first person character
here player controller is a variable of type player controller

[sudden nimbus]

depends on how you created the UI instance

[sudden nimbus]

none of that is getting a pawn reference, but is the Sedan pawn possessed by the player controller?

[craggy lava]

yes, sedan blueprint is the default pawn

do I need to change the pawn in the player controller game mode blueprint?

[sudden nimbus]

then if the intent is to set the rotation of the sedan pawn via the player controller's control rotation then seems fine

[slim knot]

Wait, what is a UI Instance? Is it this one?

[craggy lava]

there are the world settings

these*

[lost pecan]

when i compile and save a default value change in a blueprint, all its dozens of children are dirtied and saved as well.. is this working as intended?

[sudden nimbus]

somewhere in your game you need to create an instance of UI Shirt Menu

thats how it gets shown on the screen

create it, add it to a parent widget or the viewport

when you do that, thats where your reference to the UI instance is

[slim knot]

Oh is it this one?

[sudden nimbus]

you need to figure out how to get that to where you want to use it

yep sounds about right

somehow you need to get that value from your level blueprint so you can attach that event handler

fairly sure you cant do it from Begin Play- judging by those events you have for spawning the widget, it wont even exist at that point

not until the player clicks the buttons to spawn that widget

Begin Play happens when the game starts

[slim knot]

Oh okay, I'll try it with Event Tick and figure out how to get the value from Widget

[sudden nimbus]

yep, it is. And its also slow because it is rerunning the construction scripts of any instances of the subclasses that are in the level you have loaded

[slim knot]

Thanks for the help :D

[coarse flicker]

Hey guys I have a weird issue. I have a arrow to get the forward of a player/Object. Im running a line trace from the arrow world location to the arrow forward vector. But for some reason there is an angle in the line trace and it's not firing exactly straight as the arrow is. Am I doing something wrong?

Here is the BP for it

As you can see no rotations are applied to this component

[gentle urchin]

You must add the location aswell

Tracestart -> location
TraceEnd -> location + (forward*distance)

@coarse flicker

[coarse flicker]

Aren't I doing that with the forward vector?

[gentle urchin]

No

Forward is normalized , so length is 1 , and doesnt consider location

[last siren]

Looking for ways to not have to create a bunch of blueprints for similar objects (say different harvestable actors like trees, plants etc. and crafting items to be dropped in world, stored in inventory, referenced by recipes, etc. like meat, wood, stone, etc.).

Are data tables what I want to be looking at for this? Then give my actors etc. a Name type variable with "Expose on Spawn" so can be set in editor or dynamically on creation?

[surreal peak]

There are multiple ways to cut Data from Code, if that's what you want

The most involved, and probably best way is using Primary Data Assets

Because UE4 has the functionality to scan for those runtime

Which means you can patch your game later with new stuff and it should work automagically

And if you work in teams, you can have peeps adjust data without needing the code from the BP

I do not know how DataTables fit into that however. I feel like one can fully replace those with the (Primary)DataAssets

It does mean you create a new Asset per Item though, but that's something you gotta live with in UE4

Cool thing about DataAssets is that they can have functions in them

You can't adjust the state of the DA, because it's a "static" file after all (or rather you shouldn't), similar to a texture or a sound file, but all sorts of static functions can be used

@mint blaze made a YouTube video about DataAssets a short while ago, which you can watch to get a better understanding.
If he feels like it, he might even answer here/you how one can utilize DataTables in addition.

https://www.youtube.com/watch?v=kHHrDIRSr5A

[last siren]

So DataTable seems to give me like a Excel/CSV like table then the actors can do this whenever they need the data

I'll look at assets as well though. Is that more flexible then?

[surreal peak]

I would say yes

There is a lot more behind them

I think DataTables might be fine for pure number crunching

Like LevelXP and what not

DataAssets can also properly inherit from each other

Which DataTables can't

The Structs could in C++, but not the DataTable itself

[last siren]

yeah, that was one thing was finding modelling this because different types of things can need different data sometimes

[surreal peak]

Yeah

If you combine this with some Interface you can probably easily apply this to all sorts of things

Specially if you have things like weapons

Where Weapon Child X needs additional data

At which point you would need an additional DataTable again anyway

[last siren]

and with these "Row Name" strings if I ever rename/remove something going to end up hating the world. I assume data assets catch invalid references then?

[surreal peak]

Which we used DataTables for are more things that isn't necessarily data for actors

E.g. MetaData for UI, like Images and Friendly Names for KeyBindings

Or GameMode and Map data

Things where you only really need a list of the same structure for all of them

Although the GameMode stuff could also be a DataAsset again of course

[last siren]

so yeah, that is where just the blueprints really fell apart. Because I needed item meta data to show in UI tooltips etc. and spawning a fake actor just to read some fields seemed mega hacky, but then each object ends up having multiple "different" blueprints

[surreal peak]

DataAssets, if you rename them, work the same as every other asset. Fix up redirectors and you should be good.
If you rename rows in a DataTable, you might need to fix some code

Another thing with DataAssets is that you could make nearly everything into SoftObjectReferences

[last siren]

looks like an asset should work, it can have the UI stuff like icons and input to some generic actors like which mesh

[surreal peak]

So they aren't loaded when you load the DA.

And you can then dynamically decide what data to load

E.g. if you only need name and description of an item, there is no need to load the mesh into the memory

Which is advanced, but good to think about

Yeah if you have an Actor already that should hold the data, then a DA is probably better

The Data I put into Tables is something that won't live in any Actor

Like Keybinding Names or Key Button Images aren't inside any actor.

[last siren]

Interesting, uobject not struct which is a lot more flexible. Means actors don't have to go through some TMap (seems to be what a data table is) on every single function

I can just have a reference variable 🙂

and is type-safe

[surreal peak]

Yeah, although TMaps are hashed

So it's not like they go through it

Or the key is

To be more precise

[last siren]

Well FName is pre-hashed as well, but it just feels wrong to do like Tick() { HashMap[...]

in a bunch of things

[surreal peak]

And FNames are actually mapped to a unique number

So you are more or less dealing with an Array with direct access sort of

But yeah, it feels better to have a reference hehe

[sudden nimbus]

shouldn't use Tick at all if it can be avoided

double underscore asset manager

[last siren]

Well tick/other events. It seemed wrong needing it in basically every public function because can't store a reference to a row

ok, will look at data assets, seems fairly big topic but hopefully have a better idea later

[sudden nimbus]

yeah definitely make these data assets

another huge benefit to the system is the bulk editor

you can edit lots of properties of lots of assets in one grid UI

[last siren]

oh so basically like the table editor

[gentle urchin]

Cant store a reference to a row, but you can store the row info ?

[last siren]

seems they are just better

[gentle urchin]

Its static anyway, so its not gonna differ

[last siren]

Well you can store an FName and hope it refers to a valid row when you do "Get Data Table Row" or UDataTable::FindRow<T>

[sudden nimbus]

just store all the columns of the data table on the data Asset instead

[gentle urchin]

There's also the data table row handle type, which could help

atleast in bp

[last siren]

If it was a template<typename T> struct FRowHandle { const T *TheRow; }; I'd have jumped at it

[sudden nimbus]

no need for a data table using data assets, the properties of the data assets are the columns of the row

[last siren]

it seems to be like a struct {FName TableName; FName RowName;} ...

so you have to select both things in BP on every usage

[gentle urchin]

Yes,

but it has the benefit of being searchable ,

[last siren]

then hope the table name actually matches your "Get Data Table Row" node ...

[gentle urchin]

so you'll only have valid rows

[last siren]

searchable? how?

[gentle urchin]

2 sec, opening

[sudden nimbus]

why would you not just have a property on the data asset

[last siren]

oh yeah, it displays a drop down which is nice. But the bp user had to select the correct table

and it seemed if editor the table later you dont get any warnings

by search I meant "find everything that uses MyTable::DeprecatedRow in the project"

[gentle urchin]

Ah

[last siren]

seemed to be hard when was testing some stuff

if i delete a blueprint it seems to pretty quickly tell me some level used it

[sudden nimbus]

welp I tried

[last siren]

the data assets seem to be pretty good though

and if it is a reference, i am guessing the editor tells me if i break the reference. will try that one later

In either case, if I want the level editor to display the data for a particular row/asset
The pattern would be to have an "expose on spawn" variable, I can setup the mesh, materials, etc. for editor display in the "constructor script" node (OnConstruction in C++?)

and then the designer can put my BP_GenericWeapon or whatever in the map, select the type and it will display for them

seems to be the best way? And just that one extra step compared to drag and drop a concrete bllueprint?

[last siren]

not sure exactly what property you are referring to? But yeah, seems to be fairly simple each property is a "column", and for complex data I don't need on every "row" either have the choice to subclass the asset, or I could have a nested object field that defaults to null perhaps

[sonic pine]

Hiho which Object does a Cast to MasterComponent need?

[sonic pine]

ok

[random quail]

because there is no way to cast actor to component type ? input will be ACharacter cast is to UActorComponent which is always false

[dry blaze]

Hey does anyone know how I can get the second slot of additional textures in my material so I can use it? Thank you 😄

[burnt nest]

Do you mean a second material channel on a mesh? 🤔

[dry blaze]

Its on a sprite and basically I want to be able to select two source textures that can be used in my material if that makes sense

[burnt nest]

I am not quite sure how you mean... you can drag in as many textures as you want into your material, like a diffuse texture, a normal map, and so on. Do you intend to blend two textures together, or just use them for different things?

[dry blaze]

So i know that I can access the source texture in a material as there is already a Source Texture node, what I want is one of them for another texture from Slot 0 in the same material

Another one of these that I can pick the texture from slot 0

[burnt nest]

I'm still not sure I'm getting your question correctly. 😅 You can add a second slot by pressing the + in Additional Textures, and you can copy the source texture node and give that a different texture?

[dry blaze]

Sorry man haha I want to use the same material instance in multiple different sprites so I will have lots of different source textures and different slot 0 additional textures. I want to be able to get and use slot 0 additional texture the same way I would use the source texture and when I copyed the source texture, it seems to be an identical copy and I can't change the additional slot index as it is greyed out.

[burnt nest]

Ah! Hm. 🤔 I think I'd give it a go to ask in #visual-fx as this is hardly my area of expertise. 🙈

[dry blaze]

okay thanks anyways dude

[last siren]

In blueprints can I get a reference to a variable, say a struct? I can see on the functions there is the "pass by reference" flag and "Set By-Ref Var" to set it, but not seeing how to get that reference in the first place (in C++ this might be like void Modify(FMyData &Data); ... Modify(this->Data))

Is having a separate input and output for the type and copying across the only way for BP functions?

e.g. like this

[unique basin]

not seeing how to get that reference in the first place
It'll just hold a reference to whatever you plug in there

[last siren]

in the first example it compiles but my Print String sees the old value

FFoo Temp(this->Foo); ModifyFoo(Temp) I think like this would, rather than passing the reference to the original field

[maiden wadi]

Your top example should work.

I'm used to using SetMembers, but SetByRef should work as well.

[last siren]

ok, my bad. Was so close as well 😦
I'm going to go shoot someone that wrote a wrong doc comment on the original function. Actually just didn't do what it said on the tin

i should have tested after I deleted the contents of the function for a screenshot lol

[loud cipher]

How can i make my player push physics objects with less force

it seems weird that i can push a 800kg tree with ease when simulating physics

[icy dragon]

Spoiler: ||Mass in UE4 doesn't really confine to real physics equations.||

[loud cipher]

So do i have to create my own kind of physics system for it to act like real life?

[icy dragon]

If you're willing to go deep into the source code (||which is not easy||) and modify the physics solver yourself, then by all means.

[last siren]

there is a push force parameter on the character movement component somewhere.

Well, you could probably do something entirely different with the existing physics engine. The Character/Pawn/etc. movement classes are a good example of how to largely by-pass the physics engine

[icy dragon]

Assuming he wants a perfectly accurate physics solver with accurate equations.

[loud cipher]

Tysm

Yeah that push force factor helped alot

[last siren]

true, at best your going to have some level of approximation on skeleton physics

but I think could get something reasonable if took a friction value from the surface standing on etc.

[icy dragon]

Which would make sense for simulation programmes.

[last siren]

I think the other way some games did it is there large objects (usually the ones blocking things) are just unmovable except in some special interact mode (along with the pushing animation etc.) and then they just get a constant move speed

[novel basalt]

Hello, I'm looking for a way to have a "delayed activation". Basically I have a Throw a grenade ability (using the ability system), I activate it using activeAbilityByTag . What I would like is: Instead of directly throwing the grenade, an arc showing the grenade's path appear in front of the character and another action actually throw the grenade

Do you know if there's a system to do this, or what would be the best way ?

[icy dragon]

Why not execute the throw when an action input is release?

[novel basalt]

I would also like to have different ways to pre-activate an ability. The final goal would be to have abilities where you select another Actor, another location, with or without a targeting circle (like in Lol)
Basically I would like to add a step to activating an ability, but I'm not sure how best to implement it

[worthy carbon]

Hi! Does anyone knows how to create an in-game shop where player can buy and equip items?

[sonic pine]

Hiho if im using a function from an other blueprint and i have a Referece to the Function BP why the Function Output is 0 in the new BP and 20 (correct) in the original BP?
MEQSC = Reference to the BP from SetVita Function

Maybe i have to Cast to the original BP and the Reference isnt helping?

The function is working if im Printing here i will get the correct value

[royal rain]

hey im trying to make a platform move both x and z direction for a small school assignment. i don t know what im doing wrong but can i get some help. ill post my code in a second

it goes up but it needs to go down once it hits the max hegith

which it doesnt

[clear plover]

Hi, I try to make a GarbHook. I want to VInterp the Location Vector of the Hook from spawn to attach point. If i make the speed lower the Hook stops in the middle and dont finish the hole Distance.

Any idea for the reason ???

Interp has a defined Time in function and stops. ?

[desert juniper]

Anything * 0 is always 0

you're adding 0 relative position

[royal rain]

i fixed that ealier

that was an old pciture

hooked it up to the delta seconds it still doesnt reach a max height ever

so even if that was the problem it wouldnt matter bc it just goes up infitinly

[sand shore]

you have to flip the bool on the false case as well

[royal rain]

which one i thought i did

[sand shore]

so when lower than the starting position, bool is true.
when a bit higher than the starting position, it'd set the bool false.

next cycle it no longer passes the first condition (before your offset) and does whatever logic you've got below

both

oh I think I confused these maybe

[royal rain]

yeah they are two different ones

the second one is for up the third pic is for down

i at first made two if statments for each x,z reaching its max height but not only did it not change anything it also seemed uncessary

ok so i ran the sim and what happnes is that true and false are going both at the same time

i think that might mean its not reconizing when which side is going up or supposed to go down

[last abyss]

you have a problem here where if Z == end pos Z it will run both true and false

[royal rain]

one sec

[last abyss]

ah wait i missread it. its starting pos

[royal rain]

ah

ok

so im back

any suggestions idk whats happening

[loud cipher]

If i had an actor and i wanted it to print string everytime my player linetrace hit it what would i use?

I have a linetrace handled in my player bp

but a seperate actor that i want to be able to interact when my linetrace hits it

What do i start with?

[elfin inlet]

TIL if you use a flip flop node inside a function it will only fire A pin because the flip flop uses some variables internally and they get garbage collected if you put a flip flop inside another function

[rancid quartz]

Yep, that goes for DoOnce, and anything else that should "remember" anything from a previous execution.

[elfin inlet]

i just swapped the flip flop with an enum, turned out to be much cleaner

i should also get rid of that "B"

[rancid quartz]

You're going to need to break out the hit result, get the hit actor, and send it a command to fire a PrintString.

[rancid quartz]

Thanks for your reply. I've tried what you described, but I haven't found success. Maybe I need to rethink the problem from the top.

What I'm trying to create is complex.

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

I had thought attachment might be the best route to go with this design but from my experiments with this, it seems as if it does not play well with the Projectile Movement Component. At least not with GetForwardVector.

If I weren't to use attachment, I think I would need to update the projectile actors with the velocity, and rotation of the square actor which is what I might try next.

Unless you or anyone else might have some advice or experience you think might help?

Grateful for your thoughts. Cheers.

[loud cipher]

Thanks, i got something working using a blueprint interface

Each time i left click it checks if hit actor is my class

Then plays the blueprint through a messenger

[rancid quartz]

Yeah, that's a great way to do it. 👍

[royal rain]

i really need to get my BP fixed soon can anyone help

its a bit higher in chat

[elfin inlet]

is there a better way to do this? there will be several other types of building

[faint pasture]

@rancid quartz you probably want a solution using attachment or emulating attachment by using local offsets. What happens on collision? Can these projectiles go through things or do they stop

[rancid quartz]

They would pass through unphysically.

But they would overlap either with volumes or traces.

@faint pasture , do you anticipate there being problems attaching an actor with a Projectile Movement Component to another actor?

[woeful pelican]

Is there any way for an actor to find out if it was spawned by something?

[rancid quartz]

You mean to find which actor it was spawned by?

[woeful pelican]

Yeah

Okay I just managed to get discord search to work; there's an owner and instigator?

[rancid quartz]

You could create a variable of the spawner actor type in the spawnee class and expose it on spawn.

[last abyss]

I see the problem now. you are checking if your starting location's Z is less than your current Z when you're returning.

[rancid quartz]

Yeah, you'll see the owner is an actor and the instigator is a controller.

[woeful pelican]

Both return actors. Anyway, found my answer I think. Instigator should have what spawned the actor

[royal rain]

what does that mean i dont get it