Questions tagged [blueprints]

Blueprints is a visual, node-based scripting model used by Unreal Engine 4.

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How to collect objects from map in blueprints

I have a plate with trigger(TriggerVolume) on it. When it overlapped cubes from map deleting. I've manually created references on cubes in blueprint to delete them but it seems very hard-coded. Is ...
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What's the easiest way to animate a (non-player) mesh?

I made a coffin with some animations in Maya, exported it to Unreal, and I want to start the animation from a blueprint, but I can't for the life of me figure out how. I tried: Play Animation Get ...
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Unreal AI with behaviour tree not moving

I am making a very simple blueprint. I am making an AI that goes to the player character position. For this, I had made: A Enemy Blueprint, so it would serve as a general enemy management. A Enemy ...
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Unreal Engine 4 - AI MoveTo always fails

I try to move a character with AI MoveTo, but it always fails. I tried to do this with standart ThirdPersonController and a custom one. The blueprint is simple When the event happens, it starts ...
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Unreal: Get horizontal angle of velocity-looking direction

I want to calculate the relative angle of the speed in relation to the direction of view: For this I do have the "Get Control Rotation" and the "Get Velocity" of the "Pawn" I am stuck: Yeah I stole ...
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How to find the client's monitor valid refresh rates with Unreal Blueprints?

I am making a settings menu. This includes a combo box where you can change the refresh rate setting. How do I find out the maximum allowable refresh rate of the ...
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UE4 tips how to handle Minigolf Multiplayer

Heyo! I'm doing a Minigolf multi-player game right now. What I couldn't figure out by now is how to set up the game logic of the actual game. So where to keep track of all players being in bounds, ...
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35 views

Why can't UObject derived objects call BlueprintFunctionLibrary functions?

My question is a very simple one. Why can't UObject derived classes (direct inheritance) call functions from Blueprint Function Libraries? __ Edit: My question relates to Blueprints only. An <...
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When is the Interrupt Transition Event called in AnimBPs + How do you Interrupt Animation Transitions?

When is the Interrupt Transition Event AnimNotify Event called when specified for an ...
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How can I add Y-axis/Pitch/Vertical to LineTraceByChannel Raycast with Unreal Blueprints?

I am using LineTraceByChannel to cast a ray and return the name of the object it hits in my game world. It works but I am having trouble working out how to add the Y-axis (Up/Down) value. At the ...
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How to center minimap texture view ue4

Hi I am trying to create a minimap for my game and I am almost there the only problem is that i want to center the view of my minimap because right now currently it's following my player like this ...
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How to prevent rendered wound from sliding on moving character?

I am trying to display a rendered wound on the character, but I still can't figure out how to display it properly without sliding on character's body. I'm following this link on rendering the wounds ...
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Get FVector from Blueprint tick function

In my BluePrint Tick function for my character, I have a FVector that always changes, and in my C++ component, I want to get this changing FVector and use it in my C++ Tick function, is that possible ...
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Get BP FollowCamera Rotation and Location

I'm accessing my FollowCamera https://imgur.com/a/vbFagxg from my BluePrintCharacter class in my C++ code, with this following line : ...
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Old “Play Montage” node vs new 'Montage Play“ and ”Play Anim Montage"

so.. Following documentation/guides/etc.. I keep coming across the classical node called "Play Montage" which shows one of those Mario Bros pipes as an icon. However, my version of unreal engine does ...
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Collision Overlap not working in a Plane

I want to make all the objects that are overlaping my plane to be sliced! I can achieve this effect sometimes, but in some cases it does not work. Below you can see a situation where the collision ...
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Correct placing of player distance logic

I'm going to leave behind the blueprints here as they do not contribute to the question. I can make enough abstraction to get to the point. Thank you reader. I've got a 2.5d level where each of my 2 ...
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26 views

Constraining ActorLocation X

My question is simple yet it's got me wondering..I'm trying to limit my character's ActorLocation's X movement by checking it each tick. If it's larger or smaller than my desired value I set it back ...
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1answer
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UnrealEngine: Variables of GetGameMode are empty

I'm confronted with the following issue: Inside the class setup for one of my actors, I'm trying to get the value of an array which is declared, instanced and successfully populated in my GameMode's ...
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How to play runtime-generated LPCM audio from a third-party API in Unreal?

I've got an UE project, and I need to play audio coming from a third-party API. The Audio is in LPCM format, each frame is two bytes signed integer with little-endian byte order. How I can play audio ...
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1answer
427 views

UE4 Multiplayer how to replicate Player name in lobby

I've been working on a little 1V1 snipper project to try and get a better grip on the replication and the game framework of unreal engine. So after the core gameplay, I'm trying to make a lobby ...
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1answer
56 views

Making a box character in UE4, not a capsule

I want to make a character for a Breakout game that is a kind of cube. From the instructions from Unreal it appears I need to create a 'Character' blueprint. But when i do this, it comes with ...
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208 views

Unreal Engine without Blueprints

Hello fellow coders I have been using Unity and other game dev libraries fora fun hobby for many years (on-and-off, I am no expert!). But I really am not happy with Unity and their multiplayer network ...
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C++ property is none when accessed in bp

I have a class in C++ that I want to access in BP. It appears to be fine in C++ but in BP I get Accessed None errors when I try to use it in BP. Here is the class declaration that I am trying to use ...
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1answer
96 views

Destroy multiple actors by pressing a button

I'm making a simple project to learn Unreal Engine. I have 50 actors (blueprints) and at the start a function will loop 5 times and spawn 5 of the 50 actors randomly. How can I destroy the actors by ...
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1answer
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Unreal Engine: Object Reference is not compatible with pawn Object Reference

Hello I am a beginner Unreal Engine developer learning with Blueprint and I am trying to take an imported FBX model and put a pawn control on it. Below is what I am trying to do. By the way, ...
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242 views

Passing by pointer-reference in blueprints with C++ definitions

MyFunction( Class *& foo ) Inside a derivative BP of the above C++ class: foo shows up as an output rather than an input. Why?
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How do I access a struct that resides within a struct in blueprints?

I have a struct: "FOuterStruct" This is defined in code such that it contains another struct type: ...
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60 views

Why can't a blueprints project edit BPs derived from c++ classes?

I am working in a relatively small team. Now, because our IT guy is incredibly unhelpful, we don't yet have VS on all the machines (as I know this would solve the error). However, I'm still curious ...
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4k views

How to resolve “Accessed None trying to read property” error?

Whenever I finish running the project, this error message appears: Blueprint Runtime Error: "Accessed None trying to read property jogador". Blueprint: Jogador_BP_Anim Function: Execute ...
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1answer
100 views

How to make my character walk by clicking and holding the mouse button?

I created an Action Mapping using the right mouse button as a reference. The Action Map is called "Andar" (walk in english). In the character code, I call this Action Mapping and in it I make the ...
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2answers
254 views

How to make a texture appear the same way in a cube?

My problem seems so simple, that before asking the question here I did a search on google and this site: https://forums.unrealengine.com/development-discussion/content-creation/33665-applying-and-...
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Error calling a Action Map

I tried calling the event Set Destination, simply to make an impression on the game screen: I did not succeed. I modified the 3 options displayed on the right (consume input / execute when paused / ...
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2answers
625 views

Problem with action mapping

Summarizing my problem well, I need a single button (right mouse button) to do two things. In my project (TopDown) I defined that instead of the left mouse button, the character moves with the right ...
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276 views

How to make a Multicast Delegates in Blueprint?

I used the Set Timer by Event, but I could not use the delegate in more than one event: I've been researching about and it's possible, but I've only found results in c ++: https://docs.unrealengine....
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2answers
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How to decrease the size of a distance?

I made a code for the character to be teleported to the place where the mouse cursor is, if the distance is less than or equal to 350. Blueprint: I happen to wish that if the distance were greater, ...
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1answer
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Where is the part of the code of the mouse click in the TopDownCharacter blueprint?

I have a project where by pressing the B key, the character after a time interval is teleported to a point on the map. I can do this. It turns out that I imposed conditions so that at the end of the ...
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1answer
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How to set the delay based on the number of attacks performed in 1 second?

I would like the delay that defines the interval in which the warrior deals damage to an enemy, was calculated based on a number of attacks per second and not a delay. Explaining best, I'd like to ...
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2answers
178 views

How can a variable have two values at the same time?

Just to clarify, I do not want to know how to make a variable display 2 values ​​at the same time. I want to know how this is happening in my project. In the Level Blueprint I have a timer that ...
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1answer
42 views

Way to store object reference?

I have a project where a minion overlaps the tower. Needless to say, the problem occurs when more than one minion overlaps the tower at the same time. It turns out I've figured out how to go through ...
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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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3answers
1k 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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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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1answer
114 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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2answers
85 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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1answer
74 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
154 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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564 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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33 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: ...