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 - Make AI move up and down?

I have this AI character that flys around on the x and y axis in random directions, but is it possible to make the character move up and down randomly? I tried movement input with a lerp and delay but ...
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Underwater Post Process Using Unreal Engine 4 Water Plugin?

I'm using a custom water body from Unreal Engine 4's water plugin and I'd really like the screen to turn blue as soon as the first person camera goes underwater. I tried putting just a normal post ...
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How do I create surfing?

I want to know how I can lerp from my current position, to another position, while hugging the terrain. Imagine I'm doing something like surfing, or skateboarding, where I need to follow the rail......
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Multiplayer client has two GameStates

I'm having struggle with GameState. My custom GameState is child of Game State Base. GameMode (child of Game Mode Base) is updating some variables in my GameState. But my clients have two separate ...
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41 views

[MMORPG][Client -> Server -> Interest Area Clients] Movement broadcasting

I'm developing a third-person action-combat MMORPG. Custom server written in C++ 17 and the client is written/built in UE4. The interest area is implemented using a grid (cell cluster). Study case: ...
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9 views

Unreal: Paragon features: Best way to find the lean angle

I've been trying to follow the Laurent Delayen talk about distance matching and different techniques. Leans are tricky for me. This is the trigger from the talk. What is the best way to approach this?...
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24 views

How can I recreate a material from blender in Unreal engine

I'm new to unreal and I am having trouble finding a way to reproduce the materials for a mesh in blender in unreal. It's a simple material but I can't find a way to reproduce the color ramp ...
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Posing a skeleton & seeing it update in the viewport in UE4

My dilemma I am facing is: I have modelled a Neuron (octupus looking thing) in blender and attached an armature to each tentacle so that I can pose it in Unreal. Export to UE4 with skeletal mesh, open ...
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Solved UE4, How do it to where when my camera looks up and down my character mesh which is a hand also moves up and down

I am using the blueprint system on the ThirdPersonTemplate, please someone help me i have been stuck here for quite some time... -- SOLVED For anyone wondering all you have to do is set the character ...
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1answer
34 views

How to desaturate and blur the game world when paused in Unreal Engine 4

I am creating the pause menu for my game. I want the screen to turn black and white and blurry when it is paused, much like Left4Dead. But the only special effect I can find is background blur. How ...
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UE4 Blueprints - AI movement on moving platform/object (like a ship deck)

I want to have AI (enemies) on a boat that moves on a path around the level (an island). But the AI seems to have a problem navigating on the deck of the ship. They always end up on the far back of ...
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Unreal Engine 4- Post Processing material isnt working on different viewports except perspective

I would like to render a silhouette of models, I found stencil would be the best way to capture. But when I am working with stencil post-process material its does not work with other viewports except ...
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Panner Node (Planet Material Day/Night Map)

I made an Earth material that rotates and shows day and night by combining different maps and masks (Similar to these set ups https://youtu.be/FMU1FkHFHXk AND https://youtu.be/ugXWt6AmudY). The logic ...
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1answer
94 views

How do game engines enforce global, engine-specific coordinate systems?

In Unreal, the 3D coordinate system is defined as a right-handed, X-forward, Y-left, Z-up frame of reference; but, the default 3D coordinate system for, say, DirectX is a left-handed, X-right, Y-up, Z-...
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1answer
40 views

Unreal gives error when line tracing collision

I am currently using Unreal Engine 4.26. I have been following this tutorial to make a parkour game in Unreal. I followed the tutorial exactly, and made a walk/jump/double jump game. However, when I ...
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1answer
95 views

How can I change the game executable name to something other than UE4.exe?

I have a game and when I export it it is called Bounced! but in windows task manager the process appears as UE4.exe but with the logo of my game, how can I change this to Bounced.exe?
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1answer
30 views

How can I install Unreal engine on a PC with metered connection or completelly offline?

I need to get Unreal Engine 4 as soon as possible on my desktop PC, in order to complete a task. However, the computer is on a metered connection and downloading it there would cost me about 3 pizzas ...
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How to fix UV Mapping Bleed in UE4 [closed]

Images of the issue, code, and logs Howdy, I’m creating a cube using ProceduralMeshComponent in UE4 and I’ve run into the issue of creating my UV Maps. I’m completely stuck on the issue, as it looks ...
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13 views

Unreal Engine 4 DefaultInput.ini mappings not showing in editor

The mappings from DefaultInput.ini are not showing up in the editor. I had originally added them in the editor project settings, but it lost the mappings except for 2 of them Jump and Reset VR. They ...
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How do I prevent my umap from being modified at every save?

I'm using UnrealEngine 4. Every time I save my files, my .umap file seems to be modified. I can basically generate an infinite stream of commits by just clicking <...
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24 views

How to connect a UPhysicsConstraintComponent of an AActor to an FKSphylElem (capsule body) of a ragdoll?

I'm trying to connect an Actor's UPhysicsConstraintComponent to a capsule body of a ragdoll. The reason I do it this way, instead of just using sockets on the ...
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1answer
42 views

Add inertia to Pawn movement

I've just started to learn Unreal Engine 4.26.2 while developing an Atari Pong clone. This is how I have implemented the Paddle's movement (but this implementation doesn't accelerate or has inertia): <...
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12 views

How to use AttachComponentToComponent in C++?

Anyone can explain why using the blueprint is more efficient in this case, I mean when I attach the hairs using blueprint, the hairs is welded with headsocket in editor and in play mode, but with C++ ...
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9 views

Unreal Engine Visual Studio 2019 C++ - Could not open source file CoreMinimal.h [duplicate]

I'm trying to follow a YouTube tutorial and I've ran into this (Severity Code Description Project File Line Suppression State Error (active) E1696 cannot open source file "...
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2answers
34 views

How to set the hair_mesh to follow the animation?

How to set the hair mesh to follow the animation? I am trying this. ...
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0answers
53 views

Unreal Engine 4 HierarchicalInstancedStaticMesh (HISM) not distance culling

What I'm trying to do: I am trying to programmatically spawn a lot of HierarchicalInstancedStaticMesh on a very very large ProceduralMeshComponent (PMC) (very simplified for the sake of this question)....
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1answer
64 views

How to pass parameters to a Blueprint function called from C++?

I have found this piece of code showing how to call a blueprint function from C++: ...
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1answer
34 views

Where do I have to put actions when the game state changes

I’ve just started to learn Unreal Engine implementing a clone version of Atari’s Pong game. I’m thinking about where to put the code to change the state of the game. I have an enum in the GameState ...
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1answer
64 views

How do I add custom data to a ListView widget in Unreal?

I have a UserWidget object with a ListView in it. How do I add objects add and custom data to them, such as names?
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PlaySoundAtLocation plays sound after some delay

I’m developing the Pong game to learn Unreal Engine 4.26 using C++. I use this code in the class’ constructor to load the sound: ...
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46 views

How to use SetBoneRotationByName() to rotate a single bone in a armature?

I am very excited to finally be learning Unreal engine development! But I have been working with Unreal editor for only the past couple of days but am having trouble understand how to rotate or ...
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1answer
112 views

RunUAT Error: Automation was unable to run successfully (unreal engine 4.26.2)

I have completed my setup in Mac OS and configured all android dependencies like SDK, NDK, and JDK. but whenever I tried to package my project it shows an error I tried with a completed fresh project ...
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1answer
81 views

How can I add these bones to my meta human? Or is there a way I can make virtual bones count when retargetting?

Paid for animations thinking they would be fine and they mostly are but... the hands are using these IK bones that I do not have. Is there a way I can add the bones to my meta skeleton within unreal? ...
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2answers
31 views

Read actor instance's text variable for widget when triggered on different objects

What I'm trying to do: (a 'long story version' is linked in comment below) (and another user example is hyperlinked in comment below - i couldn't post over 8 images and/or links in this first comment*)...
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40 views

UE4 Repeat fail: how to feed text widget unique message on instances

I am a noob who has spent many hours looking at similar questions and responses but still failing to get desired result. I am going to be thorough and specific - I'm very keen on walk-throughs with ...
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10 views

How to build solution for this specific Unreal plugin?

I am trying to set up this Cuda fluid sim plugin in Unreal. I created a .sln file from the forked branch with CMake and then built the solution. I found an ...
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1answer
33 views

Using UPawnMovementComponent to control a Pawn with Keyboard sharing code between Pawns

I've just started to learn Unreal and reading the tutorial Components and Collisions I have found that they use the UPawnMovementComponent to control their ...
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1answer
28 views

Why Query Only fires OnComponentHit? It supposes to fires only Overlap events

I've just started to develop with Unreal Engine 4.26.2 and I've been for five days trying to understand how collision works. I'm developing a Pong game, and I'm trying to make that the Ball bounces ...
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1answer
46 views

Would creating a player scriptable game using Unreal Engine or Unity violate their license agreement?

I want to create a game in Unity or UE4 which allows the user to write scripts in Python and run them mainly to control the AI. I will have to find a way to enable runtime script execution first. ...
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67 views

Control rig sequence is not in UE4 menu

In the Unreal Engine docs, it is mentioned that, in order to create a Animation Sequence using the Control Rig, it is possible to create a ...
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19 views

How to retrieve 3D models from a server in Unreal Engine 4

How can I load 3D models from a server in Unreal Engine?
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1answer
56 views

UE4 doesnt work with subfolders

I am trying to create a file structure for my code in c++classes/Myproject (in UE4 editor). I added a new class and in UE4s "Add C++ Class" dialog box I set the path for the created scripts ...
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9 views

Get GPU Visualizer widget info

I want to read some info from the GPU Visualizer widget and use it in my plugin, but I have no idea how. I guess this code is responsible for running the ProfileGPU ...
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17 views

Get Skeletal Mesh Vertex Position in Niagara

I have a custom HLSL node in a simulation stage in Niagara. One of the input variables to this node is of type Skeletal Mesh and I want to get the position and normal of a given vertex on that ...
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24 views

Assertion Failed: TextureRHI - Texture Casting Errors (UE4)

I am taking a pointer to a UTexture2D asset "MyTexture2D", and casting it to an array of FColor using the following: ...
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0answers
25 views

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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1answer
25 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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28 views

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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80 views

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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23 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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