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Questions tagged [blueprints]

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

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36 views

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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1answer
34 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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48 views

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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1answer
41 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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1answer
99 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
48 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
63 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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0answers
17 views

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
56 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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0answers
75 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
85 views

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
27 views

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
88 views

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
159 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
35 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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0answers
72 views

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
156 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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0answers
23 views

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
106 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
72 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
31 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
49 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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1answer
50 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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1answer
31 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: ...
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1answer
64 views

How to change the value of variable from actor Y by the blueprint of actor X?

I have a project, and it has: 1 NPC (actor X), 2 target points and 1 tower (actor Y). Image of components in level: These rose arrows demonstrate part of the NPCs path. I added a Event Begin ...
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1answer
63 views

How do I make a blueprint run keyboard key commands?

I created a project based on the Top Down Example. In the project comes a character that I can move by clicking on the terrain that already comes by default. Image of gameplay: In the character's ...
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2answers
115 views

Problem with Material Parameter Collection Reference Variable in Set Scalar Parameter funcion

I was following a tutorial on using GameInstance. Where the guy in the video would teach how to choose the color of the ship by clicking a button on a level (x), so as to affect the ship on another ...
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1answer
41 views

Why is my mesh outside its collision component grid?

I've created a blueprint (well, two of them, as a test since the first one wasn't working right) with an sphere component around a mesh, as in the picture: As you can see, the mesh is well placed ...
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1answer
89 views

Switch from left click to right click to make character walk in the Top Down Example, in UE4?

When creating a new project in the Unreal Engine 4, you can choose to create a project already with some added features and things (Top Down Example): This project has a character (which I changed ...
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30 views

Placing tile on second layer results in wrong tile, or changes nearby tiles

So I am working on a 2d game and running into strange behavior when trying to add tiles to a tile map. The first layer seems to work fine but if I add a new layer it will always place the same tile ...
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1answer
137 views

Create a instance of a C++ class within a blueprint

I'd like to create an instance of a C++ class in a blueprint. That's my current approach, but the instance is None. Why?
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0answers
26 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
481 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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1answer
362 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
238 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
304 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
111 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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0answers
31 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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1answer
108 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
197 views

Dragging and dropping sword in unreal engine 4

I am developing a 2d game using unreal engine 4 in which the user drags and drops a sword.I want the sword to follow the position of my finger.At the moment, when I drag the sword, it moves at an ...
1
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1answer
318 views

UE4 Drag and Drop: Place PaperCharacter Over Image Widget

I'm working on adding drag and drop functionality to my game. I have it working with the exception of I can't get what I'm dropping to be placed where it was dropped. I've tried a number of different ...
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1answer
981 views

How can I make custom progress bar in unreal engine?

I am trying to make a health bar. I want a masked progress bar so I tried making another progress bar and moving according to the percent of the health in blueprint. But I couldn't find any ...
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0answers
220 views

Widget text is a different color in game than in engine

I have a widget blueprint to show a main menu. Everything was fine until I recently added a new button in the menu to enable cheat codes. The problem started when I noticed when I changed the color of ...
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1answer
712 views

How to stop and start sprite sheet flipbook materials in a widget blueprint?

I have a flipbook material I created from a sprite sheet to add some fireworks to a game I'm working on. I have the material set up and it is showing the animation of the firework like it should. ...
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1answer
2k views

How to change fps character's movement speed and mouse sensitivity in UE4?

As the title says, I'm using the default fps template from UE4 (blueprint template) and the movement speed is very high, also I want to adjust the mouse sensitivity, but I don't know where are those ...
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1answer
61 views

Why Are Some Foreign Characters Not Displaying Properly

I am localizing a game for the first time and I'm noticing some characters are not displaying properly. Most are fine but there is a small handful that are not correct. For example on a loading screen ...
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1answer
4k views

How can I get a reference to an actor that's already in a scene in Unreal?

I'd like to know if there is a way to get a reference to the instance of an Actor (written in c++) in the scene from a blueprint even if it's not in the scene, or at least without making a new one ...
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1answer
563 views

Why does execution continue when a delay is hit

I am working on a tile based game. I have a board generator and on the hard level I have to create 900 game tiles and add them to the screen. This takes about 3 to 4 seconds to complete. I started ...
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1answer
204 views

Ledge Detection with Plane Intersection?

i am working on a ledge climb system and I am currently refactoring it to make it more reliable. I am tracing with a sphere towards infront of my character. If it found something, I trace downwards. ...
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1answer
530 views

HUD Text not displaying/drawing

I am trying to use blueprints to display my character's speed using a HUD, but for some reason the text is not displaying. What am I doing wrong? I am using the First Person template.