Questions tagged [unreal-4]

Unreal Engine 4 is a professional suite of tools and technologies used for building high-quality games across a range of platforms.

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Creating an external tool to edit Unreal project optimization settings

INTRO I am creating a C++ app that will help users to set up optimization settings in the Unreal game engine. I want to let the program make all this work on its own. This application is being written ...
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19 views

Why is the Set new visibility doesn't resets the hair's skeletal mesh visibility to be visible?

The helmet is loaded when pressed a defined key and helmet is removed automatically by setting the remove on 2s delay. The Problem when the helmet is removed, the hairs visibility doesn't sets to be ...
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World border in World composition

A question. In World Composition there is such a border of the world. As I understand it, everything that goes beyond its limits is destroyed, but is there an option to evade it?
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How to use the unreal “automation spec” with the “automation driver” and latent actions?

I would like to be able to create an automated test for Unreal that will load a specific map/level and then use the automation driver, which as I understand it, is a way of faking user input, to do ...
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17 views

How do I determine that the edge of the camera intersects the edge of the background sprite? UE4

I'm trying to make sure that when the camera reaches the border (left or right) of the sprite's background, a copy of it is spawned from the corresponding side. But I seem to be missing something in ...
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Unreal Engine Procedural Mesh causing crash when rendering chunk size too large

Hey guys im pretty new to unreal but id consider myself a fairly advanced programmer. Im really stuck on rendering my chunks for my voxel game. The implementation is pretty simple and everything works ...
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19 views

Custom event doesn't update blueprint variables

Here's what I have: To sum it up: calling the OnInteract event (which comes from an interface) prints the 'Proceed' variable. Clicking Fire sets the variable to true and prints it. 'Proceed' is false ...
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Unreal Engine 4: Referencing an asset with asset user data instead of a class?

I created a subclass of Uassetuserdata, creating a new type of asset. Now I can reference this new class in the user asset data section of my skeletal mesh. I noticed that I could create a blueprint ...
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Cannot create EAttachmentRule variable in a Blueprint struct

I'm trying to add a EAttachmentRule variable in a struct but the enum doesn't appear in the list of available types I managed to create a variable in a BP by dragging the pin from an ...
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60 views

Unable Compile Unreal Project into .Exe File

I'm new to Unreal Engine and I've been looking for an answer online but I don't understand why the project I just started on is unable to compile. I only used the default blueprints. The error logs ...
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An inherited scene component has no details panel and can't be moved

I'm making an fps, and I'm spawning the gun at a location on the player character. To do this I added a scene component to the players class, and that is what the gun is attached to when it is ...
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42 views

Unreal virtual function causing unresolved external error [closed]

I'm making a base gun cpp class that just has the stuff all the other guns will have. I have a virtual function called PullTrigger that doesn't do anything, I just want to have it on the base gun so ...
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Unreal Crashing just by me adding components

I have created an actor cpp class called gun base. for some reason it is causing a perpetual crash in unreal. this is its header file. ...
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Lightmap not working?

So I've been exporting and re-exporting my mesh from Blender and importing it into UE4 over and over again. For some reason, even after I've generated the light map in Blender, renamed both UV maps, ...
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Character is out of location after animation montage in UE4

so I have my running and idle animation working fine on my character but once I do the attack animation thru an animation montage, my character slowly floats off the ground and as I attack many times ...
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1answer
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How do I fix this “Accessed None trying to read property Save Game” error?

I have create this blueprint, with a Check for an existing Save-Game and load it in case of true. Else, create a new save game object. While Z is pressed, create a new Save Game, getting the Player ...
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68 views

UE4 - Function is not being called

I've recently created a shuffle-type puzzle game for mobile (with Unreal Engine 4), where you, obviously, solve these puzzles. Since I didn't know how to do this puzzle mechanic in UE4, I went to UE4 -...
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25 views

Calling a function from Super is getting an error

I am following GameDev.tv's unreal C++ course, but I am getting an error that is causing my compiler to fail. I'm coding a player controller, and I think I followed all the steps right but when I ...
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Floor is moving faster than ball above it , and it causes ball to fall off the map. UE4

I am creating a game ( following Udemy lesson on Marble run) which is basically a maze and ball and we move ball my rotating floor on x or y axis through obstacles . Floor movement is linked on Mouse ...
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1answer
25 views

Use ramp and steps meshes as actual ramp in unreal engine 4.26

Is it possible to use a ramp mesh as an actual ramp in UE4? It seems that the system create a rectangle box around the ramp o the character does not climb the ramp, it is over it like on a box. I know ...
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126 views

Blocks / tiles aren't responding to clicks

I've recently finished a tutorial, UE4 Slide Puzzle by Nicholas Thompson. Halfway through the second tutorial, I found out that the blocks / tiles wouldn't respond to my clicks. For example, when I ...
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- 2 Parts: Object/Material displays at 90degrees + Material Mask will not rotate with object?

Hi I have a 2 part issue. Part 1: I have a planet in Unreal, in the object editor it is aligned properly and the material displays correctly but in the game even with the rotation set to 0 it displays ...
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90 views

How can I generate mesh distance fields at runtime on a procedural mesh in unreal engine 4.26?

I am building a simulation game that and I that allows the player to create procedural buildings rather than placing static scenery items. If possible, I would like to write a shader that can take the ...
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1answer
78 views

Why would I add components in code?

Watching a Unreal Course, and the instructor is creating a default pawn c++ class. He is adding all the components with code, but this seems really inefficient to me. Why can't you add components in ...
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1answer
85 views

Are there any serious advantages for C++ compared to C? [closed]

so I know a little bit about C (read like a few university level textbooks on it, I am not an experienced programmer or anything) and now I would like to learn the ropes of the Unreal engine to fidle ...
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1answer
29 views

Method to make character roam map isn't working

I'm an absolute beginner in Unreal Engine, so sorry for any strange mistakes, formatting, etc. I'm trying to make a game for a project where an enemy chases the player through a maze when it spots the ...
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1answer
74 views

How to enable treat warnings as errors in Unreal Engine 4.24?

I've had little luck googling and it takes about an hour to build the engine (which I have to do if I'm to test if it works), so guessing is a bit time consuming. I've seen advice to add the ...
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1answer
33 views

Unsure where to right click to delete Unreal C++ class

Trying to delete a c++ class (this should not be this difficult!) and I have deleted the .h, .cpp, and binaries. Next everybody says "now, right click on your .uproject file and select Generate ...
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1answer
50 views

Why doesn't my UE4 character perform an animation?

I have it so that when the character collides with a pushable mesh, it casts to her blueprint and sets ispushing to true, and in her Animation Blueprint, it again ...
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38 views

What does rebuilding the .vcxproj file do?

I'm having the same problem this user had. The solution is confusing me, because all I want to do is comment out the code I added that caused the compiler crash, get Unreal to accept it and stop ...
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1answer
44 views

Unable to create a blueprint containing multiple actors

I'm having some trouble in Unreal 4.23. According to the documentation, if I select a bunch of Actors and hit the Blueprints button in the toolbar, I should get an option to "Convert Selection To ...
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37 views

Unreal Visual Studio 2019 taking forever for tellisense

I'm using the latest unreal engine and visual studio 2019. I'm having a problem where intellisense can take way too long. This usually happens when I have just opened the project inf VS 2019, but ...
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26 views

How do you import submeshes on a skeletal mesh?

I'm trying to help out a friend on an Unreal issue. He has a Unity scene he's trying to convert to run on Unreal, and getting the models right has been a bit of a bumpy road. Like many models, this ...
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1answer
76 views

Is there a way to reimport an asset with new import options?

I'm trying to help out a friend with an Unreal issue. He has a character model that's been imported and used in a map. A bunch of work has already gone into setting up the scene before anyone ...
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1answer
49 views

How to use X,Y, and Z instead of Pitch, Roll and Yaw

I'm learning Unreal engine, and I'm rather disappointed because it uses pitch roll and yaw instead of the standard x, y, and z that I'm used to. Is there any way to convert this easily, or is there a ...
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86 views

UE4 Crashes when editing migrated Nvidia Flex emmiter?

I'm new to Nvidia Flex, and I've been trying to migrate the TestPackages (the folder with the pre-made emmiters and soft/rigid bodies,) over to my project. I've only been migrating the TestPackages ...
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1answer
45 views

Unreal Engine 4 - Error in Macro Syntax Causes Build to Hang

Problem Errors in macro syntax causes the module's build to hang for 2+ hours (possibly, indefinitely) with no indication of a build error. Steps to Reproduce Create a template game project in the ...
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1answer
60 views

Real-time fluid simulation?

I'd like to create a system in Unreal Engine 4 with glob-like fluids which interact with the environment, like the gel in Portal 2. Here's a GIF of the gel from that: (search that I used to bring up ...
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19 views

Cloth tool and Skeletal Bone Weight Paints in Unreal Engine

Just a quick question: I've got my 3rd person rigged and skinned, but I have some hanging fabric around the characters waist which drapes down to the characters legs. Should this fabric be weighted so ...
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1answer
51 views

Visual Studio not adding the header file to the Solution explorer

I'm having trouble with my Unreal Visual Studio 2019 project. I created a new header file, and saved it in the same folder my other ones are in. (I didn't add these, they were in the starter project ...
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1answer
66 views

What exactly is different between a string and an FString in Unreal C++?

Sorry, maybe a noob question, I did a quick google search and couldn't find what I was looking for. I have two related questions about FString. Does regular C++ Have this, or is this an Unreal term. ...
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98 views

Can't connect to Steam using Blueprints in UE4.25

I'm following this tutorial by Unreal Engine itself, but I don't have a Steam overlay popup like I'm supposed to, (according to the tutorial.) And actually a lot of people have a similar issues like ...
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1answer
25 views

UE 4.25 - Can't create EQS assets

Like the title says I am unable to create EQS assets. I am running 4.25 and there is no option in the BT details panel, nor under "Add assets -> AI". AND there is no option to activate it....
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167 views

FBX Import Errors: “Multiple roots are found in the bone hierarchy”

I followed these steps: I exported my character from Blender as an fbx file I went to Unreal Engine and make a new folder I paste the fbx file in that folder I put and tried to put it with a ...
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76 views

Unreal Engine 4.25.4 - CreateDefaultSubobject inside a child component attached to an actor loses values in blueprint editor

I have the following actor: ...
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1answer
104 views

How to manually render with a given camera in Unreal Engine 4?

I would like to render with any camera at any given time for a Portal clone project. There's a USceneCaptureComponent2D but it renders the whole scene to a texture. ...
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23 views

How to make Unreal save assets in 3-file style?

I'm trying to play around with some code to explore UE4 maps, but it assumes that every file is actually multiple files, with the asset accompanied by a .uexp file ...
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1answer
47 views

UE4 - Event Tick and getting Forward Vector

I'm trying to make a game where my character rotates towards cursor (that works). He can choose between a few weapons (also works). One of the weapons works like a machine gun. My idea was to make a ...
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0answers
46 views

Skeleton bone in incorrect spot in-game yet, blender rig, skeleton mesh and physics asset are all correct and behave properly

I've made a custom character and rigged it in blender. Then exported/imported into ue4. It behaves properly in the PHAT and the skeleton mesh looks fine and it all behaves properly in the simulations. ...
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Selecting/Hiding is broken for Perspective but works for Orphographics views. Why?

I'm learning Unreal4. Got a problem with selecting, focusing and hiding objects. Focusing Issue: Focusing have to be done separatly for perspective view and ortho view. Why it is so? Example: If I ...

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