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Questions tagged [unreal-blueprint]

Blueprints are Unreal Engine's visual programming structure. Use this tag for all questions related to blueprint programming in Unreal Engine.

Unreal Engine's Blueprint system replaced Unreal Engine 3's Kismet in May 2012. Blueprints help add functionality to meshes, props and players in order to turn 3d art into a working game.

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From tutorial: Break flow. Question, answer, question. To Question,answer,answer

The following dialogue tutorial has a system where there is a greeting, list of questions, and then an answer. The system uses IDs to tie each question to an answer and then return to a list of questions(new or the previous…
Jason Schayer
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UE4: How to cast to another blueprint?

I have a UI widget elevatorButton6. When player press the button on this widget, I want to launch a bluerint bp_elevatorButton6, but I can't cast to it Widget: Here I use interface bpi_elevatorButton:
Amazing User
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Error with TArray floats in Unreal Engine C++

C++ and Unreal newbie here. I have a class with a function I'm calling from a Blueprint. I want to create an array of floats (converted from a string) and push a value from Blueprint to it, but I'm getting an error I don't quite understand. I'm…
Andrew Langley
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UE4 get all players in FoV

I'm trying to build an array of all player pawns that are in the players FoV cone. I'd prefer to not have to loop through GetAllActorsofClass for obvious performance reasons. This will be done every tick.
Brian
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Is there an api interface to do material swapping with Unreal?

Is there an interface so that I can do material swapping through an external program on a PC? I have a tablet that is used to control other settings, and I want to use this as a way to swap materials. The tablet connects over wifi to a c# program on…
DaveS
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access a variable from level blueprint in unreal engine 4

I Have a variable that updates every time i move my cube in the level blueprint , now i want to access this variable from multiple class blueprints , what do I do , I tried casting to gamestate but didn't succeed , I am really new to ue4 if you…
Ilyas Ennaboulsi
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cannot use FFileHelper in UE4

I want to export String to a txt file using https://www.youtube.com/watch?v=wemG-YI2iag. However, after I created the C++ class, there is no #inlcude "ReadWriteTextFile.h" and I cannot use FFileHelper. It shows cannot open source file…
Xie Jihui
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UE4 Decals have always the same material

I've got an issue while trying to spawn decals via. Although I have set the material of it, it is spawning a decal with one of the 'basic' Unreal materials: Result in world | Blueprint Code | Material used I have already tried coding it in C++ and…
Sheim
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Make native C++ Code to a Blueprint in UE4

I'm new at UE4, so if I do something horrible wrong, tell it to me. I'm happy about everything I can learn The question: is it Possible to make a Blueprint out of a normal C++ class? It should - with the right includes - because I made a C++ class…
user9705759
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How to compare many booleans to pass through specific outputs? C++ for UE4

I myself am not a programmer, but I have a programmer friend who is trying to help me with a certain task in Unreal Engine 4, and I was hoping to find some advice here to pass on to him. What we are trying to make is a 'Node' in UE4 that can take in…
KnobbyNobbes
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Horizontal Camera Scrolling within given range

I want to create a mobile Game, with only horizontal Camera Movement. Like a SideScroller without the Camera being attached to an Actor. I want to let the User only move within the given Range. I'm using only Blueprints. Just to make it sure, I…
Michael
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UE4: How to plot points from a data table using a particle system

I have imported a csv file into unreal. And now have a data table. The data table has x,y,z coordinates. I want to make it so that a particle system reads the data and creates a sprite at a location for each row in the data table. I currently have a…
Philip Miller
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UE4 Blueprints - how to make sure an actor wont be created within another actor

So i have an unreal blueprint for a spawnarea collision box, that, spawns actors in it. In the main spawn blueprint(which is just in the event graph) and am spawning actors the Add Child Actor Component in the blueprint, and i want to make sure that…
EndGameCo
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How to wipe history from SourceTree for a complete noob?

I am a complete coding and programming noob. I'm currently doing a project in Unreal Engine 4 using just Blueprints. I'm becoming more and more interested in coding but as of now, assume I know close to nothing. I'm using Sourcetree together with…
William
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constant damage loss in trigger zone, unreal engine 4

How can i damage my FirstPersonCharacter's health constantly while it's in the trigger zone? It loses its damage only when it enters onBeginOverlap on the trigger zone. Here is my blueprint:
pinug
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