A game library which enables cross-platform game development in Java, with support for Android development and desktop development. It makes use of OpenGL for portability.

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balloon ligher than air with libgdx, impementation of FixtureDef.density, gravityScale, linearDamping?

I use libGdx/box2d's physic. My intention is to create a balloon filled with helium (a body, what hovers above a surface, if we apply a little force to it - it moves fast but not far, if we push ...
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134 views

Libgdx: different speed on different devices

I am running a simple Libgdx app that I have wrote, on my Android phone and Android tablet and I am getting the unexpected result of having different velocities when a body is moved. To move the body ...
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90 views

LibGDX particle emitter rotation

I have a libGDX game, in which I'd like to make some ice breath like effect using particles. So far we made a cone like effect. I can obtain and render it on the screen with this. ...
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1answer
14 views

How can I add extensions to libGDX

I had a problem with my Font in a game I am developing in libGdx. After some googling I was instructed to use the following code: private void createFonts() { FileHandle fontFile = ...
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2answers
444 views

LibGDX , Scale button with animation when it is pressed

I am developing game using LibGDX . I want to create beautiful menu and to scale buttons when they are pressed but not in this way , when it is pressed scale it 1.5f , I want to scale it with ...
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5 views

Box2D - Slow movement on bodies when some are above others

I set a random position around the screen to some circle bodies with 1f density. And when some of them are above other bodies, they move until they dont touch each to other. I want this movement, but ...
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1answer
22 views

How do I query a LibGDX Box2DLights “light” and “dark” regions?

I have lighting implemented using Box2dLight. I want to update/render things inside the player's PointLight area. Stuff in the dark area should not be rendered. How can I find which areas are lit or ...
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329 views

Card game - creating card Listener

I am making a card game where there are 21 cards on hand and 2 options from where user can draw cards to his hand and throw a card from hand. I am new on game development and I'm following the ...
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1answer
24 views

Scene2D: How to use Image.setDrawable()

I'm trying to change the texture of an Image actor on my Scene2D stage, however I can't seem to get it working. It seems like setDrawable() doesn't really do anything. For example, this will make ...
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1answer
909 views

Libgdx actor bounds are wrong

The Actor's boundaries are not centered at the ButtonText but I used the setBounds() method. The higher the Y position is, the less centered is the boundary. The weird thing is that i only created ...
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1answer
347 views

Word game - board implementation?

I'm working on a boggle type game for android, using libgdx. The user is presented with a 4x4 grid of letters and must find words by dragging their finger over the letters. Unlike boggle I want used ...
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2answers
56 views

LibGdx TextField - Hide Keyboard when not focused - How to?

I'm creating a registration screen for my game. I implemented textfields and input is getting correctly. But when I click elsewhere after text is entered, the keyboard stays visible and does not hide ...
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398 views

Changing Box2D Body from Kinematic to Dynamic after contact

What is the correct way to change a Kinematic body into a dynamic body? context - I have a dynamic body as a projectile which has to be fired at a kinematic body (it is kinematic because i am ...
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53 views

Libgdx inputlistener scrolled is not working

I am currently using libgdx. Below codes are added to a stage. this.addListener(new InputListener() { public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) { ...
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1answer
42 views

2D Collision Response

I am trying to implement collision response in my libgdx game. I'm using Rectangle objects as my bounbing boxes. This makes collision detection very easy, however I can't quite get the response ...
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1answer
13 views

libGDX sprite image not updating Event Handling InputHandler

I created a separate inputHandler class implementing InputProcessor. I'm using Event Handling (libgdx github page: https://github.com/libgdx/libgdx/wiki/Event-handling) public class inputHandler ...
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1answer
14 views

How to scale LibGdx TextButton?

Apparently textButton.setScale() is not working. Even when the scale is set to 0.1, the button is displayed in it's original size. How to properly scale a TextButton in LibGdx? The official ...
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1answer
37 views

Playing with hashmap in drawing

I'm developing a game in Java for Android, using LibGDX. In my render(), between the batch.begin() and batch.end() I'm running through all the game objects and draw them. Every game object is stored ...
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1answer
53 views

How can I update a Stage-based HUD from another Stage's Actor in libGDX?

I feel like this is a simple problem, but I'm having issues finding the correct search terms. I have a Screen that includes two Stages. The first, stage, contains a number of objects deriving from ...
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1answer
25 views

libgdx continuous movement while touch and hold (even after jump)?

So, I have these buttons where I have implemented a method to handle 'touch and hold' (without polling). If the player touches and holds the walk button ..it will keep walking till the button is ...
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1answer
96 views

Scene2d Stage Actor setup issues

I am creating a game using libgdx. In the same each level has a class. I have stage as a member variable of the class. To this stage, I add actors. Inside the levels class, I have attaced the input ...
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1answer
39 views

LibGDX - Show a minimap

I've started to develop a small roguelike game in LibGDX. I've also made a minimap class, which creates and updates the minimap as the player explores the dungeon, by using a Pixmap. The minimap class ...
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2answers
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Problem to match font size to the screen resolution in libgdx

I'm having problems to show text on my game at same size on different screens, and I did a simple test. This test consists to show a text fitting at the screen, I want the text has the same size ...
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2answers
62 views

How can check a collision between 2 non-axis aligned boxes?

I'm making a simple and easy game and I need to detect the collision between 2 boxes. It only needs to return trueor false, no physics involved. I started working and couldn't find an algorithm that ...
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2answers
155 views

libgdx texture edge blending problem

I have two completely white bitmaps here: They're there, trust me. When I put one on top of the other and scale them down with TextureFilter.Linear I get this: How do I get rid of the dark ...
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1answer
36 views

LibGDX - how to detect touchUp with GestureListener?

I'm making a game and I have implemented GestureListener as my inputprocessor. It came with a bunch of methods such as fling, pan, tap etc etc including touchDown. However, there is no touchUp method! ...
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1answer
121 views

LibGDX Box2D Lights - Illuminate background

I have a box2D world made of tiles. I use a custom DirectionalLight for light up the scene from above (It shines through transparent blocks [eg.: the water] more deeply). The problem is (as expected), ...
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14 views

Design a grid with draggable Actors

A quick overview about what i want to do. I want to make a grid 5x5 centered in the screen in which each cell can contain an Actor that can be moved in another cell. An Actor can be of any type, ...
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1answer
30 views

How can I add a transparent overlay to a UI in libGDX?

I am attempting to use the following code shapeRenderer.begin(ShapeRenderer.ShapeType.Filled); shapeRenderer.setColor(3,3,3,.3f); shapeRenderer.rect(0,0,gameWidth,gameHeight); ...
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1answer
20 views

LibGDX viewport touch coordinates transformation

I've been trying to get LibGDX's viewport and camera unproject() to work and so far none of the tutorials/answers I've found have worked for me. I have a game window of 840x480 units with ...
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1answer
40 views

Using deltaTime and Frame Rate Independence

I'm working on one of my first games and I've read that linking your game logic to FPS is bad because it will run differently at different FPS (obviously). I have already made some of the basic game ...
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27 views

NullPointerException in android.app.Activity.onCreate(android/app/Activity.java:874)

I'm trying to get libGDX 1.6.1 to run on Android via Ruboto. So far, I: Generated a new libGDX app using the app generator Got the desktop app to run (Java) Got the android app to run (Java) ...
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25 views

Level generation with libgdx [closed]

Hello i am designing a game with libgdx for android. Now i want to create different levels for my game. the game will include about 200 levels. levels are only about changing some variables in ...
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324 views

LibGDX how to change animations

I have a Player Class and i have 3 different Animations for it. I can render them perfectly but i don't know how to change from one animation to another. For exmaple i have 3 animations, one for ...
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34 views

Libgdx performance on old devices

I'm developing a game in Java for Android, using LibGDX. I'm using Nexus 5 to test my game most of the time and it works great (Minimum FPS it gets is 57 out of 60). Recently I ran my game in Galaxy ...
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1answer
331 views

Lighting shadow casting sprites with box2Dlights

I currently have something like this using box2Dlights Ideally, I would like objects casting shadows to be lit, so the object is lit but there is still a shadow cast around it. Right now the object ...
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1answer
1k views

Two pass blur shader using libgdx tile map renderer

I am trying to apply the following technique: blur effect using two pass shader to my libgdx game using the OrthogonalTiledMapRenderer. The idea is to blur the background wich is also a tilemap but ...
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1answer
47 views

LibGDX - Tilemap Wall Collision Detection Issues

I cribbed some code from another web tutorial (SuperKoalio - https://github.com/libgdx/libgdx/blob/master/tests/gdx-tests/src/com/badlogic/gdx/tests/superkoalio/SuperKoalio.java) about detecting a ...
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2answers
1k views

libgdx actors and instant actions

I'm having trouble with actors and actions. I have a list of actors, they all have either no action, or 1 sequence action This sequence action has either : a couple of actions (some are instant, ...
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1answer
26 views

libGDX: Why doesn't Gdx.input.isKeyJustPressed() work?

I'm trying to use the method Gdx.input.isKeyJustPressed() to check if the Android BACK button was just pressed. I don't want to use the Gdx.input.isKeyPressed method to avoid multiple calls. Here is ...
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19 views

Box2D collision between dynamic body

I'm implementing Box2D for my 2d top down LIBGDX game and i have some struggle with two dynamic body. Currently, my two bodies are created that way : BodyDef bodyDef = new BodyDef(); ...
2
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1answer
802 views

libGDX using Stage and Actor produces different camera angles on desktop and Android Phone

libGDX using Stage and Actor produces different camera angles on desktop and Android Phone. Here are pictures demonstrating the problem: http://brandonyuh.minus.com/mFpdTSgN17VUq On the desktop ...
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2answers
848 views

Sprite draw-order in libgdx

From other frameworks I know methods for easy ordering sprites within a spritebatch (to determine if a sprite has to be drawn in front or behind another sprite). For example in MonoGame/XNA this is ...
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24 views

How to “pause” stage actors listeners

I have a problem with multiple stages and listeners in libGDX. I have GameScreen with gameStage (contains game elements), uiStage (score label and pause button) and pauseStage (resume, restart and ...
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1answer
232 views

Multiplying by delta not giving smooth movement

I started working on my first proper game but reached a problem straight away. In short I have a game that runs most of the time at 60 fps. ( I am using Libgdx a popular Java framework) but my game ...
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2answers
87 views

LibGDX - Rendering things in different classes

thanks for your time! I'm really new to LibGDX (and Java itself). Which approach should I use to render my different game parts? I want to show a background, the main character, a bunch of enemies ...
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29 views

I can't understand the batcher.draw at libgdx [closed]

here is the code: batcher.draw(birdMid, bird.getX(), bird.getY(), bird.getWidth() / 2.0f, bird.getHeight() / 2.0f, bird.getWidth(), bird.getHeight(), 1, 1, ...
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2answers
34 views

LibGDX - Managing a Minimap

I'm making a top-down strategy game so I thought a minimap is a must. I'm using Scene2D to display my GUI and since the minimap is technically a part of the GUI, I used the stage camera to position ...
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1answer
70 views

Run one cycle of animation when button is pressed in libgdx

I am looking for a way to run my animation a complete cycle when a button is pressed. The animation runs as long as the button is pressed but the animation takes a second to play so it becomes too ...
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45 views

libGDX SpriteBatch.draw() origin not working as expected

I'm having a weird issue with SpriteBatch.draw(). I'm using the Ashley Super Jumper demo (https://github.com/siondream/ashley-superjumper) as the basis for my code. Here's the render queue: ...