Questions tagged [unreal]

The Unreal Engine. Not to be confused with the free UDK.

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Get BP FollowCamera Rotation and Location

I'm accessing my FollowCamera https://imgur.com/a/vbFagxg from my BluePrintCharacter class in my C++ code, with this following line : ...
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Old “Play Montage” node vs new 'Montage Play“ and ”Play Anim Montage"

so.. Following documentation/guides/etc.. I keep coming across the classical node called "Play Montage" which shows one of those Mario Bros pipes as an icon. However, my version of unreal engine does ...
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Does PerObjectConfig work when loading?

Is PerObjectConfig supposed to work when loading (not saving) the configuration? I did a lot of tries but never succedded to make it work. It worked for a per class basis when droping PerObjectConfig ...
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Unreal crashes on level change

Can anyone help me? I'm trying to switch levels in Unreal Engine. The map I have is just the default map, a cube with collisions turned on, and a trigger sphere with a single "open level" node ...
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UE4. How to create a reference to the physical material asset (which I create in editor) in C++

Oftenly, when we want to assign asset to the particular component in C++ we write code like that: ...
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Collision Overlap not working in a Plane

I want to make all the objects that are overlaping my plane to be sliced! I can achieve this effect sometimes, but in some cases it does not work. Below you can see a situation where the collision ...
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How can I 'pass' multiple render targets to an Unreal compute shader?

I need to access three things from a compute shader: the current textures being drawn to two render targets, as well as the previous output of the same compute shader. Essentially, I am trying to ...
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Correct placing of player distance logic

I'm going to leave behind the blueprints here as they do not contribute to the question. I can make enough abstraction to get to the point. Thank you reader. I've got a 2.5d level where each of my 2 ...
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Get Oculus Quest player position Unreal engine

I’m trying to make an Oculus Quest scene that is a scale replica of a real 10x10ft space. I’d like the user to spawn in the scene in the same location as they are in real life. How can I do this? I ...
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Constraining ActorLocation X

My question is simple yet it's got me wondering..I'm trying to limit my character's ActorLocation's X movement by checking it each tick. If it's larger or smaller than my desired value I set it back ...
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UnrealEngine: Variables of GetGameMode are empty

I'm confronted with the following issue: Inside the class setup for one of my actors, I'm trying to get the value of an array which is declared, instanced and successfully populated in my GameMode's ...
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What is the right way to access raw data from an Unreal material's output?

I am using an Unreal material not so much as a material but essentially as a compute shader for performance reasons (using the Custom nodes in a material blueprint), where I perform a bunch of per-...
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How can I sample from a normal distribution in HLSL?

I need to 'distort' individual pixels inside a compute shader node of an Unreal material. Specifically, the pseudocode for this per-pixel operation looks as follows. ...
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Clamp UVs checkbox disappeared?

I've run into the following problem. I'm following some tutorials for shading to the exact letter. It all works except my meshes have really bad shadowing in/on them. I see the difference with the ...
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How to play runtime-generated LPCM audio from a third-party API in Unreal?

I've got an UE project, and I need to play audio coming from a third-party API. The Audio is in LPCM format, each frame is two bytes signed integer with little-endian byte order. How I can play audio ...
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UE4: “Ignore Move Input” Does not get Set back on

I have the following issue: I have some logic which I call to Set Ignore Move Input on for a specific player character, based on a boolean. However, after half a second, I set it back on. Everything ...
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Axis Mapping gives one-sided values

this has got me stuck badly: my project is in 2.5D. Jumping and crouching not implemented yet. Making use of Axis Mapping Input from the project settings, where numpad 4= 1 and numpad 6= -1 to ...
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How do I properly use Unreal's Lens Distortion plugin?

I am trying to use UE's LensDistortion plugin (seems like it's bundled with the engine but only put to use in the Compositing sample project), and following the same workflow as the sample. ...
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After a postprocess effect, can I output a list of all non-zero pixel locations without having to save the entire image?

I am trying to simulate what's known as an 'event camera' in Unreal. Unlike conventional cameras that output full frames, event cameras return the locations of pixels where activity is detected - see ...
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How to apply linear drag to a velocity vector?

I have built my own movement code for my character as I want to make smooth movement. (This project is just a character and a floor/wall for testing). The code seems to work fine, but I of course ...
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Changing default folder structure of New Project in Unreal Engine?

I wonder is there a config option to change the default folder structure of a new project. So for example when I create a new project there is already a folder for 'Blueprints', 'Maps', 'Audio' and '...
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25 views

Real-time 3D Scene-reconstruction into Physics Engine

I am trying to create a game where the user scans the room using RGBD camera and reconstructs 3D scene. This scene would be integrated into physics engine, after an object recognition algorithm tells ...
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Why here does my use of GetOwner() make UE4 crash editor?

I am new to Unreal Engine. I am following a tutorial where at the end he challenged me to build some extra features to the game. Basically. This code crashes UE4, but I found out if I remove "...
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UE4 Multiplayer how to replicate Player name in lobby

I've been working on a little 1V1 snipper project to try and get a better grip on the replication and the game framework of unreal engine. So after the core gameplay, I'm trying to make a lobby ...
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114 views

Unreal Engine without Blueprints

Hello fellow coders I have been using Unity and other game dev libraries fora fun hobby for many years (on-and-off, I am no expert!). But I really am not happy with Unity and their multiplayer network ...
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Unpack the pak file - Unreal Engine

So I have the encryption key. This is stressed so much to have it. Well, I have it. Where do I use it? Unrealpak does not seems to offer an option to supply the encryption key, if your pak is encypted ...
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unreal import vs import into level

I'm trying to import my blender generated fbx file in to the unreal editor with import into level tool and it keeps messing up the scaling. The ...
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Can I “subtract” the current image from a previous one inside a UE material?

In Unreal Engine, I am trying to create an effect that essentially involves the following operation: If I have an image at time instant t, I want to compute the per-pixel difference between that image ...
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Unreal Engine Niagara Write to Texture or Data Structure

In the Niagara system, is there any way to write to a texture? I want to write the position of each particle into a texture. So the 2d grayscale texture has its intensity as the number of particles in ...
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What causes the car in the Vehicle Advanced template to rotate in the air?

If you start a project with the Vehicle Advanced template, move the car high up, and press play, the car will rotate forwards as it falls. As far as I can tell, most things within Unreal Engine will ...
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50 views

Destroy multiple actors by pressing a button

I'm making a simple project to learn Unreal Engine. I have 50 actors (blueprints) and at the start a function will loop 5 times and spawn 5 of the 50 actors randomly. How can I destroy the actors by ...
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Unreal Engine Niagara Particle Velocity Based on Density of Particles?

Goal: Simulation of particles where each particle moves to the direction with the highest density out of candidate directions. I'm not sure how to do the following operations using UE Niagara. How ...
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(Unreal) Creating 3D tiles (cubes) for the scenery of a 2.5D rpg (similar to Pokemon Gen IV and V)

I developed a concept for a college class and I think it has enough potential to actually become a game. The visuals will be similar to games like Pokémon Black and Octopath Traveler as in the ...
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239 views

Is there a way to assign a texture to a button and resize it in the Unreal Engine?

I'm attempting to create a main menu for my game and have followed an easy tutorial to do so. The tutorial doesn't cover assigning textures or images to buttons, so I set out to do this myself. ...
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Is there any way to convert .unr file?

I'd like to examine a Harry Potter game for study purposes. All of resources are fine except map file. The maps are in a .unr file format. I know it is unreal map ...
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1answer
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Why can't a blueprints project edit BPs derived from c++ classes?

I am working in a relatively small team. Now, because our IT guy is incredibly unhelpful, we don't yet have VS on all the machines (as I know this would solve the error). However, I'm still curious ...
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What is an ArchVisCharacter? What is it used for?

As the question states. I can't really find any useful documentation surrounding this. What is an ArchVisCharacter and what do you use them for?
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How to make changes to Pawn.cpp Unreal?

I am trying to figure out a problem related to CableComponents. As part of my learning and problem identification I'm trying to place some UE_LOGs/Debug Messages within Pawn.cpp and CableComponent....
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What is the intended usage of FDetachmentTransformRules in Unreal

There seems to be little to no documentation on this part of Unreal functionality and I was wondering whether anyone here had any examples to share with the community or information regarding ...
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187 views

How to draw the editor's camera position in play mode Unreal?

The blue camera that is drawn for the CameraComponent in the editor. My intended usage is that when playing a third person template, ejecting from the pawn and then selecting it, will show the Camera ...
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How do game engines export projects?

I've been wanting to make a small game engine (relatively. basic features, predefined shaders) to learn that side of game development and I was wondering how game engines export projects to create ...
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How to use the Object parameter in UInputComponent.BindAction?

What is the purpose of the Object parameter here? UInputComponent.BindAction(..., UserClass* Object, ...) What information should I pass here?
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What is the most efficient way to trigger an action based on proximity?

I am developing a 3rd person platformer that entails a grapple hook system. This grapple hook system relies on a series of 'grapple-able' points. I would like these points to shine every so often. ...
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XCOM 2 WotC Class Mod Problems

I made a class mod for XCOM 2's War of the Chosen expansion, and things aren't working. The classes don't display properly - not all of them seem to show up, and none of them have localization text. ...
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How to use CreateGridMesh in RuntimeMeshComponent

I don't know to pass on the 5th parameter. I'm still new with C++ so if someone could help me with the pointer ...
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61 views

ue4editor.exe GPU selection

Even though I set ue4editor.exe to use integrated graphics on my laptop, it somehow ends up using the discrete nvidia gpu; is there a way to set the preferred gpu with the unreal suite?
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In Unreal Engine 4, how do I get the component's “game object” via C++?

I have an ACharacter instance with a weapons component that inherits from UActorComponentattached to it. I'm currently writing ...
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Keyframe animation workflow

Been digging through the animation tools in Unreal, trying to find a direct way to set keyframes and edit animation curves on a skeletal mesh. It seems far more complicated than I expected, generally ...
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Why do i get this error in VS2017 but game compiles and works as expected?

I have this error, yet the game works and that variable ActorThatOpens get assigned correctly. In my header the includes are: ...
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Game runs in UE4Editor but not standalone

I have just completed these instructions to build and run UE4Editor for Linux. I created a new C++ project and in the editor I hit the Launch button and after a while it compiled and ran successfully....

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