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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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UE4 - images not appearing in Web build

I created a game with a lot of sprites and flipbooks - it works very well in a windows build, however in web build - some don't appear at all, some appear as a white square instead of a regular image ...
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Optimally implementing an animation in UE4

We've already made a tank's track spline animation but it's using a lot of memory because it's implemented inside a tick function. So, it needs to check every second but as you may know it requires a ...
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How to make a sprite above my character appear on the minimap attached to the floor?

I have a project where I made 2 minimaps. One of minimaps is linked to the character of my project and the other to the floor: As I already said in the title of the question, my character has a ...
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2answers
62 views

How to make TEXT RENDER stand facing the camera of my character and also for the camera of simulation?

I have an actor (Minion) with a Text Render just above it mesh: As you have seen, I defined your rotation as absolute, so the text does not rotate along with the actor. In the game the rotation ...
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Elements of a widget blueprint do not appear if I click on simulate

I made a widget that contains 2 minimaps and 2 texts related to a character's variables. When I click the play button (Selected Viewport) everything happens fine: Focus where I circled in pink. It ...
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68 views

Anyone want to form a team and make a game? [closed]

The title says it all. Please comment if you are seriously interested in forming a team and developing a game.
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0answers
17 views

Change text of bus destination sign at runtime

I have rigged a bus in blender and imported it into Unreal. Now I want to change the text of the destination sign at run time. How can i do this?
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0answers
23 views

Why is my project overlapping being canceled / deactivated / unconfirmed?

I finally discovered out what the problem has been haunting me for some time, which made me ask these 3 questions: How to make overlap detection more accurate? Nonsense error in the overlap between ...
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17 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
63 views

Game area where I can not click?

I created a project based on the Top Down Example. What is happening is that there is an area just above my character where I can not click. Image showing location where the mouse is and soon after, ...
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1answer
49 views

Overlap detection does not work correctly when there is more than one warrior colliding with the tower

I have a project where warriors are generated and they follow a route. In this route has a tower, when a warrior overlaps that tower, it takes 5 of it life, and he does it every 1 second. Code of the ...
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1answer
52 views

Nonsense error in the overlap between 2 warriors and a tower

I have a project where 1 warrior is generated every 5 seconds. This warrior as it is generated tries to follow a path that contains 4 target points. Between the target point 1 and the target point 2 ...
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45 views

How to make overlap detection more accurate?

I have a project where there are two types of warrior, red and blue. When they overlap, both are destroyed, or at least that is what should happen. Red Warrior Blueprint (code of destruction): This ...
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18 views

Error detecting collision with another instance of the same actor?

I have a project where after a certain time interval 2 NPCs are generated in different locations on the map. Each of them collides with a collision box that defines its "class" (red or blue): When 2 ...
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1answer
40 views

How to change the speed of an NPC?

I created a blueprint. I added several components to the blueprint. I made it follow a target point and it does it correctly. I'd like to make the NPC make this way to the target point faster, but I ...
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1answer
25 views

How to call an event of level blueprint from NPC blueprint?

I have the following situation: 1 NPC that follows a path containing 3 parts. Target Point 1, Tower and Target Point 2. It turns out that the first NPC that passes through the tower destroys it. ...
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1answer
30 views

Actor does not perform action when spawned?

In the level blueprint I made a code so that after 5 seconds an NPC was spawned, it happens that it does nothing. Only the NPC I added by the level editor acts correctly. Image of what happens: ...
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1answer
24 views

How to change the value of variable from actor Y by the blueprint of actor X?

I have a project, and it has: 1 NPC (actor X), 2 target points and 1 tower (actor Y). Image of components in level: These rose arrows demonstrate part of the NPCs path. I added a Event Begin ...
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1answer
26 views

How do I make a blueprint run keyboard key commands?

I created a project based on the Top Down Example. In the project comes a character that I can move by clicking on the terrain that already comes by default. Image of gameplay: In the character's ...
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1answer
25 views

How to add material to a blueprint created?

My project has a cube and a capsule. Below you can see an inserted cube of the modes tab. Beside a capsule inserted from a blueprint created by me: I can drag the material I created and use it in ...
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1answer
45 views

Error in the order of the target points to be followed. How to set the order of elements in an array?

I have a project where it has 1 NPC and 3 target points: In the project I set the NPC to go to target point 1, then to 2, then to 3. Expected path: Path that is occurring: This problem did not ...
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1answer
56 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
27 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
44 views

How can I find the opposite angle and position of the camera?

In this project I have a character and a camera that follows it. The camera has a position relative to the character that was defined as (x = 0, y = 0, z = 0) and also its rotation: I found a value ...
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3answers
130 views

How do one NPC follow a succession of target points?

I have a project that contains 1 NPC (AI) and 2 target points. In the project I can make the NPC follow any of the 2 target points, but I can not get it to follow target point 1 and then target point ...
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2answers
52 views

How to make specific paths in UE4?

I have a project where I have 1 character (playable) and 2 NPC's (AI). The NPC's are programmed to meet 2 target points. Below is an image to facilitate understanding: As you can see, this green ...
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2answers
32 views

Problem with Material Parameter Collection Reference Variable in Set Scalar Parameter funcion

I was following a tutorial on using GameInstance. Where the guy in the video would teach how to choose the color of the ship by clicking a button on a level (x), so as to affect the ship on another ...
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2answers
145 views

Money Every Minute System?

I'm making a 2D sandbox tycoon in UE4. I haven't started the money system yet, but I was wondering how I could make a money system that gives you a certain amount of money per real-life minute. Then, ...
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1answer
92 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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2answers
38 views

Add logic if Shift is pressed nothing to do if not speed=100 to my BP

I have followed tutorial on how to make 3rd person game but I cant figure out how to implement logic if Shift is pressed nothing to do and if its not set speed to be some value lets say 100
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1answer
32 views

Why is my mesh outside its collision component grid?

I've created a blueprint (well, two of them, as a test since the first one wasn't working right) with an sphere component around a mesh, as in the picture: As you can see, the mesh is well placed ...
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0answers
37 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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1answer
44 views

Unreal Engine Size on Disk

I want to install Unreal Engine 4 from the epic game launcher but I have the following problem: If I want to install the engine after about 50% it says I don't have enough space on my disk, and if I ...
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1answer
48 views

Modular weapon in UE4 editor

I want to create a modular weapon system. I already got most of it working, but I wonder how to make an improvement. Weapons in my game have different firing modes (semi and auto) and "bullet" modes (...
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1answer
50 views

Switch from left click to right click to make character walk in the Top Down Example, in UE4?

When creating a new project in the Unreal Engine 4, you can choose to create a project already with some added features and things (Top Down Example): This project has a character (which I changed ...
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1answer
40 views

How to animate infinite rotary movement

I would like to add a chainsaw (or something similar to it... a rotary blade) to my game as a melee weapon. In fact, a rotary blade is a better example. Would it be better to do it in blender ...
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13 views

Import animated mesh without a rigged skeleton / armature

How can I import an animation of a mesh that was not animated using rigging, skeletons, or armatures from blender? There's got to be a way.
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1answer
77 views

In Cricket games, how is the ball synced with batsman's shot animation? How does the ball hit right at the center of the bat? How does this work?

I've been trying to figure this out for quite some time now. In Cricket games, when the bowler bowls, and batsman takes a shot, how does the ball sync with batsman's shot animation? For example, let'...
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2answers
59 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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29 views

Value returned is different to the value of the original object

I was wondering if someone could help me resolve a small roadblock I encountered aha... Essentially, in my Pickup.cpp file you can see that I'm trying to establish a behaviour wherein the object being ...
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1answer
27 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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28 views

Placing tile on second layer results in wrong tile, or changes nearby tiles

So I am working on a 2d game and running into strange behavior when trying to add tiles to a tile map. The first layer seems to work fine but if I add a new layer it will always place the same tile ...
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0answers
25 views

Drawing a helix effect in Unreal

i want to draw/graph an equation(like sinusoidal signal or any parametric equation) in UE4. I don't know if that is possible. I looked for it but found almost nothing. here is what i found most ...
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2answers
34 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
44 views

ue4 - create a instance of a c++ class within a blueprint

i'd like to create a instance of a c++ written class in a blueprint. that's my current approach, but the instance is 'None'. any advices? =)
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33 views

Problems setting up Epic online services in an Unreal Engine 4 project

I have been attempting to get the new Epic online services APK working in a UE4 project. When I add the header files and the .lib file to the project, Visual Studio does recognize the various ...
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2answers
65 views

How to create smoke that spreads outward in all directions?

I saw many tutorials about smoke grenade but they just use volumetric smoke. I want to make something like the smoke grenade in PUBG, where the smoke spreads in all directions; how to do that? The ...
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Is it possible to connect an external source machine to Live Link?

I would like to be able to connect multiple external machines to Unreal Engine via Live Link in order to stream solved motion capture from one of the Vicon run-time solvers/retargeter (i.e. Pegasus). ...
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1answer
28 views

UE4 - UMG button polymorphism

I want to make a menu with a bunch of buttons. I want them all to look the same and be easier to edit, so I decided to make one "Button Parent" widget, insert it few times and give it a different "on ...
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1answer
92 views

UE4 crashes on launch when using custom components in C++?

I created SM_Door in my Editor with a custom Actor class named "Door" to fire some events like open and close. The problem is, ...