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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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I am getting error on LineTraceSingleByChannel() function.

Here is my function implementation. Here are the error(s) I am getting.
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2answers
6k views

Do industry professionals building games using UE4 use Blueprints at all, or do they use C++ exclusively?

As a teacher on a game development module I have usually insisted that users use C++, because it is a more sought-after skill in industry, but online support and information on C++ in Unreal Engine 4 ...
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1answer
18 views

Unreal Engine: Third person example project and multiplayer

I was fiddling around with multiplayer stuff in Unreal Engine. I looked into events that run only on server, multicasting events, replication of variables... But there is something that I dont quite ...
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Need Help implementing Perforce depot or GitHub repot that allows offsite cloud hosting with onsite primary server syncing between local machines [closed]

Essentially, I have been working towards finding a simple solution using either perforce or GitHub desktop or a combination of the two. I would like to create a repot/depot on a GitHub server or ...
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25 views

Unreal Engine 4, import landscape mesh

I can export the landscape of UE4 (File -> Export Selected -> .obj / .fbx) and load a landscape, for example, in Maya. But how is the modified landscape loaded back into UE4? Otherwise, how to import ...
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what should i set as front axis while exporting fbx from blender to unreal?

I want to know the fbx export settings form blender to unreal. in some forums it is mentioned that +x is forward, but when i tested in my pc, +y is forward, because when i align the scene in front ...
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13 views

How can I add multiple collision components to a skeletal mesh?

How can I add multiple collision components to a mesh that is part of a character blueprint? I have a character blueprint with an inherited capsule component. The capsule component works, but if I ...
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10 views

UE4 Google Play leaderboard writes but when it shows it says “no scores yet”

To all UE4 developers. I'm using Blueprints to do the Google Play Services. I am desperate because what's happening is so contradictory: I've set up everything in Google Play console. my leaderboard ...
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41 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
42 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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1answer
49 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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19 views

Returning a placed structure to inventory, then placing it back down retaining its' contents

I'm making a mod for Ark Survival Evolved and I'm trying to come up with a variant to the pickup feature. I want to be able to keep the structure inventory upon returning it to the players inventory ...
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62 views

Design pattern/data structures for multi-level asset hierarchy streaming based on proximity?

I'm inspired by CIG's buzz about Object Container Streaming and am curious about how they implemented it. To generalize the curiosity, I am curious about how to implement the streaming of multi-level ...
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UE4 Determine refraction hit point inside sphere?

Mac OS UE 4.21 C++. See PIC1 for two spheres which are actors with a static mesh sphere and glass material, and a spherical collision trigger around each. So, I have 2 spheres and through AI/BT I ...
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1answer
38 views

Ludum Dare - Tips and tricks for new challenger [closed]

I plan to join on solo the 43th Ludum dare in 20 days. It will be my first LD and I would like to know if you have some tips regarding the LD in general or some software to suggest. My goal is not ...
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1answer
31 views

Unreal 4 - How to access and iterate through the polygons of a mesh?

I'm newbie with Unreal Engine 4. I need to create a function which calculates the volume of a mesh, based on the following example: https://n-e-r-v-o-u-s.com/blog/?p=4415 To achieve that I created ...
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35 views

How can I construct an Actor of Actors?

I have an actor ATile which is a game tile. It has a static mesh which it creates in the constructor. ...
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48 views

Creating a real loading screen between levels in Unreal Engine 4

I'm trying to create a loading screen to pop up between levels in Unreal Engine 4. I want to have a traditional loading screen such as the loading screen in Skyrim, where the player presses play and ...
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77 views

Recreating Common “Glowing Pillar” Effect in UE4

I've noticed a common "glowing pillar beacon" effect in a few games lately (Overwatch, Fortnite, etc). The effect provides a translucent glowing beam pointing upwards that tapers off towards the top ...
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17 views

UE4 how to make smooth transisions for surfaces

Looked for hours now. I'm looking for a way to make a smooth transisions for different surfaces. Like I want to make a minigolf course with things like downslopes but I don't want a hard edge for the ...
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1answer
45 views

UE4 Get direction of Ball rolling and boost it

I'm sitting on some kind of a Minigolf-Game in my freetime. There is a PowerUp collectable which should give the ball a boost. I tried it with SetPhysicsLinearVelocity and also with AddForce. ...
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1answer
46 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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49 views

How to get an Unreal Engine 4 Level to sync using Git Source Control?

Hello Game Development Stack Exchange, I and a couple of collaborators are working on an Unreal Engine project, we do not share a common network, which meant that using a local network storage to ...
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27 views

ue4 android crash

The strange things happen, on android 7.0 (samsung s8+) and 7.1 (samsung Note 8) works everything just fine. But i got a big amount of crashes on google play. Most of them was on android which is less ...
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13 views

UE4 - storing complex data

I'm trying to create an array of objects holding some information. The objects do nothing other than storing the info, they have no methods or events. The data is just a vector and some floats. I ...
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84 views

Stop time when the player is stopped, advance time when the player moves

I started modifying the basic first person shooter template with some time stopping mechanics, and this is what I came up with: ...
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1answer
65 views

UE4 - projectile that turns into an enemy?

I'm wondering what would be the best way to do this: A boss enemy tosses a smaller enemy as a projectile. After landing the thrown enemy starts behaving like a normal enemy with walking, shooting etc. ...
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1answer
68 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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17 views

Sprite more bright than texture

I have imported new texture to UE, and have created new sprite. In the sprite I set as material next one: Also I set as Texture-parameter my texture. But my sprite render more bright than its texture....
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1answer
58 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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0answers
32 views

Meshes pasted into UE4 project have no color - only grey default material

I downloaded an asset pack to start making my own landscape. I copied & pasted the assets files from the .rar archive to my UE4 project folder, and now when I launch Unreal Engine and try to ...
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2answers
57 views

How can I add left and right movement to my sprite without reducing forward movement?

I've made a character sprite that moves left and right when I press A and D, and moves forward automatically. However, whenever the character moves left or right, the forward movement is greatly ...
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1answer
80 views

Water cut off effect in UE4

Working on a side scroller game in Unreal Engine 4 and I need to create a water cut off effect like seen in the screenshot of Ori and the Blind forest. Basically need a side perspective on water ...
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1answer
109 views

Is RPC Safe and what is security layer of RPC?

We're creating a MMO and I wonder is RPC safe or not ? Isn't RPC easily hackable by injecting to client and what is the security layer of RPC on Unreal Engine ? For example; a player is walking and ...
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UE4 Blueprint Node Ordering, Vector Rotation and Child-Actor Communication woes

Right now, I'm trying to familiarize myself with UE4 by building a simple Tetris clone. I've hit a snag with the rotation of my tetrominoes. I'm working with three types of actors (Cube, TetrisLine ...
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57 views

Korean localization does not work after packaging the game in UE4

Works perfectly fine when I launch my game from the Editor. But the moment I package it the translations gets entirely weird. It shows a same Korean character repeatedly instead of showing the actual ...
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23 views

Unreal Expose Terrain Layers via a blueprint

I have the below play area and I have 4 terrain materials defined in a material and attached to the terrain. What I want to achieve is a way to use a blueprint to expose the pathway layer through the ...
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27 views

UE4 : Get Normal, Depth and Semantic Segmentation of rendered scene

I started using Unreal Engine 4 to generate a dataset for machine learning. I'm looking for how to generate images containing the following specifications : Depth Map of the environment Normal Map ...
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0answers
29 views

Blender to Unreal Material workflow…?

I'm new to game development and the Unreal Engine and I have a general question. I model my objects in Blender and import them into Unreal Engine. My question is, is it better to create and apply ...
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1answer
148 views

What's the difference between UClass and UObject?

I know that UCLASS() macro creates a seperate UClass for every UObject class ,but what is the need for this seperate class , how both of these classes relate to each other and what is the basic ...
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1answer
43 views

UObjectFinder versus UClassFinder; when is one better than the other?

I want to change the default pawn of my game and I decided to do it with c++. I came up with this solution, which works fine: ...
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1answer
24 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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2answers
89 views

Speed limit for Newtonian spaceships?

I am working on a game based around Newtonian physics. Therefore there is no drag and therefore a ship will keep accelerating indefinitely if there is no counter-force acting on it. This is being ...
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1answer
67 views

Unreal Engine: Access Violation on FObjectFinder

I got a problem with my project in unreal. I wrote some code about a month ago and it worked fine until yesterday when the editor started crashin on launch. I get this error message in the log: ...
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0answers
75 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
116 views

Editor-Assignable function pointer in UE4 C++?

So I have a TriggerBox that I'm using as a pressure pad, and I want to be able to attach objects to it that, when the TriggerBox is activated, will have specific functions called. Similar to unity's ...
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0answers
61 views

Importing external particle systems - unreal engine 4

Now, I have read that it is impossible to actually import a particle system into Unreal engine. However, I still do not understand how exactly to create a particle system inside the Engine itself, ...
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0answers
50 views

How to set up a Quiz game with multiple types of questions? (Structs and DataTables)

I am looking to integrate a quiz mode into a game I am in the process of developing in Unreal Engine 4. I'm really just kind of stuck on how to set up my data structures and not really know the way to ...
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1answer
62 views

Working in large play-area maps, what are the performance and practical differences between Unreal Terrain and a subdivided OBJ mesh terrain?

I've managed to reliably use SRTM Geotiff Raster Data with some modifications to create decent terrains in unreal, but there is a small problem with how I go about city-building when I'm not using the ...
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0answers
23 views

Modify PlayerPawn on clients & server when spawning

I want to set components in PlayerPawn on Server and on Client depending on certain player settings. The server should have the Authority. For testing, my PlayerController class contains those ...