Questions tagged [unreal]

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

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23 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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28 views

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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45 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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28 views

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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43 views

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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52 views

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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1answer
32 views

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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1answer
33 views

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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45 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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89 views

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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24 views

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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56 views

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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38 views

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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1answer
39 views

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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1answer
34 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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45 views

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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25 views

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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1answer
83 views

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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1answer
78 views

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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23 views

How to spawn objects and control the content in each spawn

I'm using unreal engine and would like to spawn multiple actors and control the text in each spawned actor. How can this be achieved in unreal engine?
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1answer
71 views

Unreal 4 why does reducing scalability take so long to compile?

I have almost nothing in my scene--in fact, I reduced my scalability settings from "High" to "Medium" before even loading my level layout--and doing this has crashed the program multiple times. It ...
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1answer
33 views

How to use alpha channel with emission?

I am trying to assemble scene assets and one asset needs an emission material where only the white part emits light: I set up a texture with a simple (air-quotes) "mask" for the window... ...and ...
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1answer
131 views

Are unity games as performant as Unreal's? [closed]

TLDR: I make both RPG and MMORPG, 3D, heavy games with big landscape. Both engines are very good, but which one produces games with more FPS assuming the quality was the same? I've been using ...
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91 views

Smooth network movement lunge (UE4)

I am working on a melee in Unreal Engine 4 that lunges towards an enemy until it reaches it and applies damage. I have tried various approaches to get the movement looking smooth on the local client. ...
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2answers
92 views

Static Camera on Endless Runner

I am developing a mobile game in ue4. For this project, I need to have a "static" camera so that the player can move within the frame not affecting camera location and rotation. But as this is an ...
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1answer
92 views

Why does iOS packaging fail when I activate Apple ARKit plugins in Unreal Engine?

Steps, Using Unreal Engine 4.21.2 1 - I created new Third Person game from the Unreal Engine template and named it FaceARSample 2 - I imported a skeletal mesh with blend shapes 3 - I added this to ...
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2answers
135 views

How can I edit collisions in Unreal Engine?

I made a concave house model. When I import it to Unreal Engine it generates a simple box collision that covers the full mesh. I need a collision that only covers the walls. How can I generate one or ...
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1answer
152 views

Create a instance of a C++ class within a blueprint

I'd like to create an instance of a C++ class in a blueprint. That's my current approach, but the instance is None. Why?
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1answer
504 views

How to setup input for local multiplayer without split-screen in Unreal Engine 4

To bind actions and axes in the character blueprint class, I may have multiple such character instances for each new APlayerController. Merely 1 Action Name (e.g. avoiding ...
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18 views

Incorrect shading after building light

Whenever I build light in Unreal, the light doesn't seem to reflect off of objects correctly. This seems to happen with basically anything I import into the engine (I use Blender for all my meshes) [...
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257 views

how to make AI do jump on navigation mesh system?

hi :D i'm currently using unreal for make a sand-box game for learning purpose. and due to the unique attribute of sand-box game, i am looking for how AI move naturally on map (which changes so often)...
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1answer
203 views

Linking Unreal Engine with OpenCV libraries built with RTTI on Linux

Unreal Engine has a plugin for integrating with OpenCV. Currently that plugin works on Windows. I'm trying to modify this plugin to work on Linux. I've worked through many issues but I have one I can'...
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1answer
433 views

Convert global 3d coordinate system to a local one with specific direction

Imagine a (x,y,z) coordinate system within a solar system, with (0,0,0) beeing the center of sun where Z axis goes thru both solar poles. I'm standing on a planet inside a house within that solar ...
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1answer
186 views

Using DualShock 4 motion sensor in Unreal engine (windows)

Anyone know how to access the gyro/accelerometer values from a DualShock 4 controller in the Unreal engine (under windows)? Are there any plugins that do this? Does raw input work?
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1answer
96 views

Lighting in Unreal is not fluid, lighting changes drastically at object “borders”?

I used the starter content's wall objects, an atmospheric fog, a directional light and this is the result: As you can see, it's obvious where the new object starts. Why?
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1answer
178 views

Manipulating time in Unreal messes up Physics simulation?

I'm trying to achive a Super Hot like gameplay, where the time only flows when the player moves. But when I stop time, then restart it, physics simulation will be messed up. Like: Cloths starts ...
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2answers
317 views

Multiple errors on brand new C++ project

I've just started a brand new project and created a created a new C++ Character class. However Visual Studio 2017 shows 140 errors. The project still builds fine, however the syntax highlighting and ...
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67 views

Using Unity/Unreal as graphic engine while programming the game externally [duplicate]

My favorite language is C++ and I feel most comfortable to stick to it. I made a game in C++ primarily using the console output as a graphical interface: somewhat like that of dwarf fortress. ...
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1answer
102 views

How can I fix texture clipping in Unreal 4?

I made a small project testing out mini-maps, it worked fine, I left it alone for a few months and reopened the project, and now I'm getting this: I'm not even sure what to call this kind of issue ...
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1answer
520 views

How to change the time dilation using C++ in Unreal Engine?

I searched a bit and found a blueprint solution which does this but I've just started using Unreal and I prefer C++ instead of this visual programming thingy. I'm looking for a Unity-like ...
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2answers
105 views

Sprite brighter than texture

I have imported a new texture into UE, and have created a new sprite. I have setup the material of the sprite as follows: I have also set my texture as texture-parameter. But my sprite renders ...
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1answer
325 views

How to return reference from BlueprintImplementableEvent?

I've got a C++ component and I want to have function which will be implemented in Blueprint like this: ...
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1answer
36 views

UE4 opens C++ project the second time

When I create new C++ Project (Base Code), UE4 opens only code editor (MS VSCode). Then when I close code editor and I open this project, UE4 opens its editor. Why?
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82 views

Development decision: how to proceed regarding OpenGL [closed]

There is a 3D app developed by someone with OpenGL almost 2 years ago. The development is not finished by the previous developer and I'm assigned the task to finish it, based on customer requests. I ...
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1answer
418 views

Object movement in Unreal using BPs and input touch and ARCore

So I am trying to move an object in Unreal through input touch using ARCore. The problem is that I can't use the simple Screen to world position because it just returns a world position wherever the ...
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1answer
179 views

Native crashes on UE4 android game only in distribution build

As I build my game for development mode and install it directly from apk file to my device, it runs without errors and doesn't crash, there are in-game ads and it is able to get variables from game-...
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1answer
90 views

How can I handle a transition into building interiors?

I am trying some stuff on Unreal Engine to make something approching games like Commandos series. But for now, I'm stuck with something I can't figure how it is done : How are building interior ...
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1answer
675 views

Overlay an Image on Screen in Unreal

I need to overlay an image on the screen, the whole screen. The process would be like: A screenshot is captured by the camera. It's blended with another image and the resultant image is displayed on ...
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1answer
276 views

Can I use Unreal assets store assets in other Engines?

Unreal recently released a lot of assets from their game Paragon for free; I like some of them but am not particularly fond of the Unreal Engine. Can I use those assets in another engine like Unity ...