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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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what are capabilities and limitations of unreal engine blueprint [closed]

im a unity developer and recently i had an argue with unreal engine developer that says everything mechanic and game play can be achieved with unreal blueprint. basically blueprint is a scripting ...
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Is there any best book or site(instead of docs) for unreal engine core system in c++ source code level? [closed]

Is there any best book or site (instead of docs ,wiki..) for unreal engine core system in c++ source code level? I want something like overall unreal engine code architecture (not for gameplay, just ...
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31 views

Understanding UE4 OpenGL contexts

Recently, I was browsing the UE4 source code. I was especially interested in the OpenGL implementation on Windows. The OpenGL "Dynamic RHI" (as they call it) implementation can be found in the ...
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23 views

How to get frustum coordinates of a scene capture / camera at a given focal distance?

Is there a way to get the bounds / frustum coordinates of a UE4 scenecap2d at a given focal distance? I'm not seeing a way of getting either 6 vectors for the frustum volume coordinates or 4 vectors ...
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1answer
68 views

How can I exit an Unreal game with a specific exit code?

How could I quit out of a Unreal game with a specific exit code? In Unity you can just Application.Quit(exitCode); but I could not find anything regarding Unreal. ...
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17 views

Unreal Engine and Simple Animation

I am creating a card based game and I am stuck on an animation detail. My question is I need an animation to shuffle the deck, a animation for dealing and an animation for drawing. My question is ...
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1answer
255 views

Why Godot over Cryengine, UE4, Armory3d or Unity3d? [closed]

Godot have a low performance in linux systems and lack of functionalities? This appear not been in account when peoples vote for him over other engines and i wonther whi. I know it is under MIT ...
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1answer
62 views

UE4 - 2D puzzles in 3D game

I want to create a game where you walk around in 3D, and sometimes you can activate some kind of 2D puzzle. For example - you walk up to the door, and you can open it using lockpicks. The lockpick ...
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37 views

Reflection captures need to be rebuild message wont go away

So I have a problem. I can't seem to get rid of the message saying reflection captures need to be rebuilt. I have built the lighting and clicked on build reflection captures but the message is still ...
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1answer
33 views

Unreal Android game crashes after google play integration

I'm fairly new to android game dev but after some months of work I finished making my game in ue4. However, when uploading it to google play on an alpha track and then trying to launch the app, it ...
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0answers
26 views

Why is the clear coat second normal disabled by default?

As described here, in order to set up a clear coat material with normals for both layers in Unreal Engine 4, it is first necessary to enable this feature in the project settings: Why is this not ...
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2answers
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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
40 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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44 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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1answer
68 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
52 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
90 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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1answer
46 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
60 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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0answers
135 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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1answer
143 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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1answer
78 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
52 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
98 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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92 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
72 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
134 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
39 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
113 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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2answers
70 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
127 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
152 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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0answers
97 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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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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1answer
58 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
295 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
50 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
25 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
96 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
88 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
76 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
140 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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104 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
72 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
67 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
26 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 ...
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0answers
92 views

Does Unreal Engine comply with Nvidia Control Panel settings?

I tried setting DSR (Dynamic Super Resolution) in Nvidia Control Panel (DSR - factors set to 4x and DSR - Smoothness set to 33%) to get better anti-aliasing quality in Unreal Engine 4, but as it ...
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1answer
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UnrealEngine4 “backwards compatilibility”: Can I view a site that uses Unreal Engine4 on a very old laptop and still see in high definition?

Backwards compatible? The project: I want to render a high definition model on my personal website such that it'll be rendered in the highest definition possible on any device, from a 20-year-old ...
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1answer
54 views

Rotation doesn't turn towards characters on right

So I'm working on a tower defense type of game and I have a rotation set up that is supposed to follow a chosen enemy. What I'm seeing is when the enemy comes from the left the turret turns quickly to ...
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0answers
72 views

Link between render translation and x,y position

I am trying to understand how the set render translation node of the "on drag detected" function links to the x and y position of the widget item. From the attached image (widget item) it can be seen ...