LibGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, Mac OS X, Android, iOS and your WebGL enabled browser.

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Error in projecting coordinates from FitViewport to screen in LibGDX

i'm using a FitViewport to render my "game world". Viewport virtual dimensions are fixed 400x240. I use viewport.unproject method to scale input touches from screen coordinates to world coordinates, ...
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82 views

Native vs Framework development for simple board game development [closed]

I have been working on a simple word game like Hangman Pro but for a different language and I have been using libgdx blindly. After a lot of hassle and unnecessary distractions, I am beginning to ...
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360 views

How do I delete all saved preferences in my libgdx project?

I want to delete the preferences that saved my last highscore. How can I do this? Here's how I am saving preferences at the moment: prefs = Gdx.app.getPreferences("ZombieBird"); if ...
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56 views

Creating a bitmapfont from images?

A bitmapfont consists of a image and a textfile that hold the position and size of each character on that image. Is there any way to create the text file with just a image? Or do I have to manually ...
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72 views

Avoiding circular referencing using a Finite State Machine in a Component Based Architecture

While answering this question, I realised I had made the same mistake in my own code for a game I am writing using an Entity-Component System. The problem arose when I decided to use a Finite State ...
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1answer
417 views

LibGDX multiple enemies animations

Hello everyone i have a question about animating multiple enemies on the screen at the same time. Basically, i figured out how to use the Pool for creating enemies and dispose them after use etc.. ...
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1answer
88 views

AssetManager proper usage in libgdx

I am a beginner in libgdx and I am coding a simple game. This game is like a word puzzle where each letter is a texture. Before loading the first level I need to load into memory 26 textures, one for ...
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3answers
5k views

libgdx game not disposing

My game does not exit entirely even after calling dispose() method. It loads a black screen when I launch it for the second time and works well if I kill the game manually and restart it. I get an ...
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3answers
222 views

Which is the best method implementing a background scrolling for game in libgdx?

My question is very simple I am new to libgdx development, which is the best approach implementing a background that is to make the background move in y direction 1)My First approach is drawing the ...
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2answers
83 views

How do I properly load maps?

I'm trying to load my map properly, but it takes some time (after the games has been started) to be how it should. Am I doing something wrong? Why is this happening? AndroidStudio: Tiled (map ...
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1answer
25 views

Convert MathAtan2 angle to degrees

I use an angle to set the velocity (or direction if you prefer) of my sprite, however, I want the sprite to be heading in the same angle as I'm moving, rotating according to that angle. How I set ...
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1answer
214 views

Dynamic Events in an Entity Component System

My game makes extensive use of libGDX's Entity Component System Ashley, and my game world (including all levels and areas) is created with Tiled. In Tiled, I have an object layer where all of my ...
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2answers
327 views

Animation reset in libgdx

i have an issue that i hope it's easy to resolve. I'm playing various animations in my libgdx-created game. For a particular animation, i need that to play in loop mode but only if a particular ...
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1answer
36 views

Box2d Coordinate System

In the game I'm trying to code I got to have two bodies. One StaticBody and one DynamicBody. I want to have the DynamicBody on top of the StaticBody. Somehow all I get is this: Is it possible that ...
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1answer
92 views

Certain Unicode Characters not displaying when setting text to TextButton in libgdx

Ok I am trying to do a word game much like Hangman Pro but for a different language(specifically amharic) using libgdx . And I have got a list of words saved to text file and I have taken care of BOM ...
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3answers
2k views

How to correctly set window size in Libgdx scene2d.ui dialog

In my libGDX application I am using the scene2d.ui classes to render my game's GUI. One of the things I render via these classes is a dialog window with a background image set. I have created the ...
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72 views

Physics Body editor loader collision detect

In my game I use the Physics Body Editor to add custom shapes to my bodies. In my show() method I use the follownig code to create my Jetski Body: BodyDef jetskiDef = new BodyDef(); ...
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2answers
106 views

Slingshot gravity effect

I am trying to make a sling-shot that fires a projectile. I want it to act like the standard sling-shot in angry birds. So far I managed to get the "pulling" effect, ie. If I draw backwards it fires ...
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1answer
45 views

set sprite to current animation texture

In my game I have some box2d bodies where I add sprites using the following code in my render() method. for (Body body : worldBodies) { if (body.getUserData() instanceof Sprite) { ...
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2answers
258 views

How to close an app correctly on desktop?

When I use Gdx.app.exit() the game window closes but the resources don't appear to be released and the app is still running. For instance, to exit on when the escape key is pressed: public boolean ...
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1answer
280 views

AI pathfinding in mostly-free space

I'm working in an action/strategy proyect. Consider it a RTS game. The game is in 2D (with LibGDX), and I have a lot of soldiers moving along. Now I have to implement the AI. Let me say some things ...
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2answers
3k views

How to fire a touch event only for the touched sprite?

I have a set of sprites, each one implementing InputProcessor, and registered to an InputMultiplexer, when a sprite is touched, everyone fires the touchDown event. Ok, so I can get the touch ...
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105 views

libgdx drawn a projectile trajectory cannot render

I am looking to draw a projectile trajectory . I found a lot of code such as : http://blog.gemserk.com/2012/07/03/drawing-a-projectile-trajectory-like-angry-birds-using-libgdx/ The code I editor; if ...
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1answer
80 views

My Sprite is disappearing when it collides with my floor (libGDX)

I am just starting to build the game "engine" and I am using a sprite drawn in the same position as a rectangle and the two always move together. I have another rectangle which is the floor when the ...
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1answer
165 views

Libgdx are textures off screen rendered?

Let's say that my code looks like this: OrtographicCamera camera=new OrthographicCamera(); camera.setToOrtho(true, 100, 150); SpriteBatch spriteBatch=new SpriteBatch(); ...
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36 views

How to detect number of pointers being used on screen?

I wan't to be able to detect if the screen is touched by two fingers at the same time. final int MAX_NUMBER_OF_POINTERS = 20; int pointers = 0; for(int i = 0; i < MAX_NUMBER_OF_POINTERS; ...
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3answers
51 views

Libgdx RotateToAction does not directly rotate between 179 and -179

It took me a bit of debugging to realize why I'm having trouble with my rotations and it seems that rather than just moving the 2 degrees between 179 and -179, it prefers to rotate all the way in the ...
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1answer
357 views

Soft Body Collision with Box2d (libGDX)

I've made a few classes to create soft body objects in libGDX using Box2D (specifically a circle and rectangle similar to these links). The objects are constructed of a number of circle shaped Box2D ...
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90 views

Libgdx - Transparent color over texture

I am attempting to tint a texture a color but I want the texture to show under the tint. For example, I have a picture of a person but I want to tint them a light green and not change the transparency ...
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1answer
119 views

Pixel thin lines appearing between sprites on camera move

I'm going to apologize in advance for the lack of screenshots, but this was a very hard thing to capture, but very obvious to see. I'm using LibGDX to create a tile base rogue-like. Everything is ...
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1answer
43 views

How to draw a BitmapFont every user click

Im starting learning the libgdx framework and I want to "clone" some games. I know how to handle touch with if(Gdx.input.isTouched()) But how do I render new fonts every time user clicks on the ...
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1answer
194 views

Dialog/event system in Java/libGDX

I hope that I'm posting this correctly as I'm new to the site, feel free to correct me if I'm in the wrong spot. As for my issue: I'm working on an 2D side-scrolling platformer game in libGDX, and ...
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1answer
165 views

Is there an optimal method to implement moving background?

I am trying to develop a little game using libGDX. We have a hero who jumps and world consist of dynamically created moving platforms in an auto side-scrolling manner. I wanted background to scroll at ...
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2answers
101 views

Why does Intersector.overlaps return false?

I am trying my hand at creating a simple game using libGDX. The idea is: We have a hero who jumps and world consist of dynamically created moving platforms in an auto side-scrolling manner. In order ...
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2answers
281 views

Why do my Box2D bodies occasionally get stuck and separate forcibly?

I'm making a space game with LibGDX and Box2D. I made a video here to illustrate the issue. Verbal description: When objects collide, they sometimes get stuck together and are then suddenly separated ...
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1answer
402 views

Libgdx Networking (http requests) - Login [duplicate]

I am new to Networking and Databases, but im trying to learn MySQL and HTTP Requests to create a user Login for a game. My goal is to let users create accounts and login to them etc (for Highscores ...
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116 views

resize images in libgdx

I know how to set Image width and height using pixel coords. Is there a way to set relative coords? I want to deal with multiple screens. For example i have 1920x1080 screen size. And i have relative ...
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1answer
16 views

libgdx: 2nd var of myClass()'s values saving to/overriding 1st var of myClass()

I'm using libgdx with Eclipse. PROBLEM: In the class inputHandler I have a list of buttons, menuButtons, composed of 2 buttons: playButton and retryButton. They both belong to the class ...
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1answer
44 views

precedurally generate blob-like surface? [closed]

Just looking for some direction, I'm making a 2d top-down game and need to make some random shapes for an asteroid surface. I want to have so control so I can have not too-circle-ish but not ...
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1answer
200 views

Tween animation with Universal Tween Engine LIbGDX

Let me preface by saying that I'm new to libgdx... I have an animation that I'm currently drawing to the screen using: game.batch.draw(flyAnimation2.getKeyFrame(elapsedTime, true), 200,200,0, 0, ...
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1answer
31 views

Box2d java contact point reference changes after collision

I am trying to hold the contacts made during a collision in an array list. After I add n amount of contacts, when I try to retrieve them later on, they point to the last contact made in the world. ...
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1answer
235 views

LibGdx Sound start to give an error after loading GameScreen multiple times

I have a LibGdx game, where the user taps on the screen, and a Sound will play. When the user taps on the screen, a texture will "fire" another texture as a missile, and can hit a target, when this ...
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0answers
105 views

Rotating, moving and scaling a mask in a shader

I want to rotate, move or scale a mask in a shader. But I have no clue to how perform these actions. My code: @Override public void create() { batch = new SpriteBatch(); background = new ...
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1answer
107 views

How can I implement child objects that follow the movement of a parent?

I'm looking for a way to have a character, let's call it "root," with a number of other similar characters attached to it. Let's call them children. When the root changes position the children follow ...
3
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1answer
126 views

Should I initialize a Box2D World per Level?

I'm using a LevelManager to load Tiled maps in my libGDX game, which stores: Static: final Size of map in Tiles final Size of map in Pixels final Size of an individual tile TiledMap ACTIVE_MAP ...
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2answers
103 views

LibGDX: Content appears stretched although I'm using a ScreenViewport

I just fixed another issue regarding the scaling inside a ScreenViewport. And yet another problem arises: If I'm understanding the wiki correctly, a ScreenViewport does not scale or stretch the ...
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3answers
986 views

2D - Smooth lighting with shadows for a tile-based game

for the last week or so I have been completely stuck on trying to implement efficient lighting. I've been researching and experimenting and I've looked everywhere that I have been capable of finding, ...
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22 views

LibGdx - Sound stops working after a while with error from SoundPool/AudioTrack [duplicate]

I have a LibGdx game, where the user taps on the screen, and a Sound should play. After a while, the Sound stops, and all other Sounds too, but it doesn't stop completely, it plays after a while ...
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1answer
249 views

LibGDX: Issue with unitScale for Tiled and Box2D

I've got the following: I use a TiledMap (loaded from a .tmx), each tile 32x32 pixels in size and generate the Box2D bodies for collision from the TiledMap's ObjectLayer. That all works fine, no ...
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1answer
65 views

The import aurelienribon cannot be resolved

I've been having problems with using the Tween Engine by aurelien ribon for a Splash Screen for my 2d game. I'm using Eclipse and libgdx. I've tried rebuilding, clean...-ing, and refreshing. I've ...