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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How to handle two players playing on one keyboard with Box2D (LibGDX)?

I'm making a racing game with LibGDX and Box2D. I've been using this tutorial to implement the basic physics, and it works properly. My main problem is to implement two different sets of keys (UP-...
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1answer
112 views

Change screen dimensions in libgdx in HTML

Can i change the screen dimensions in libGDX in HTML? If I inspect the element (the game) in Chrome and I change canvas width or height it changes the screen dimensions, but I don't know how to do it ...
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libgdx limit angular speed

I'm working on my top-down game. y characters use pathfinding + steering behaviors(Arrive and FollowPath) to move. I've implemented my character class from libgdx SteeringActor class (from tests). So ...
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1answer
102 views

How could I draw text in an 'info bubble' with libgdx?

I am making an android game using libgdx where there are textures on the screen which represent people. When you touch a person sprite I want a little info bubble to pop above their head displaying ...
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1answer
107 views

Handling multiple input mapped to single in-game controls

I am trying to map multiple input types to single in-game controls using libGDX's InputProcessor and ControllerListener interfaces. Currently, I have created a single InputType interface which is ...
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1answer
76 views

Centering an animation [libGDX]

I have the following class: public class AnimationDemo implements ApplicationListener { private SpriteBatch batch; private TextureAtlas textureAtlas; private Animation animation; ...
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2answers
642 views

Basic 2d platform collision detection algorithm has a slight bug (Java)

I'm trying to implement collision detection between Player (the main character) and a Platform. They are both modelled as rectangles; when player hits the side of a platform he should bounce off it ...
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23 views

libgdx box2d move object in bezier curv

I'm making a game and i need to move my game object in a bezier curv path i succeeded in doing it: //create Bezir curv .... path.valueAt(outMove, val); path.derivativeAt(...
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1answer
301 views

LibGDX make an object rotate around something

I need to rotate and object, which should be a circle made up with a ShaderRender, around a specified point. In LibGDX there is a method or something which allow me to do this? If it doesn't exist how ...
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1answer
133 views

Get array from JSON in Libgdx?

I wanted to load in map information using JSON, is there a way to get String, Int, float etc lists or arrays from JSON in Libgdx? My structure looks like this { "data": [{ "name": "...
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1answer
2k views

Libgdx Do a fixed rotation for orthographic camera

I'm trying to rotate my OrthographicCamera in the render loop to a fixed angle, but I can only make the camera spin. This is the code that I have: in create(): OrthographicCamera camera = new ...
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22 views

libGDX GWT compile with “-style DETAILED”

So basicly my libgdx HTML5-gradle build doesn't work. When switching from state it gives the following error: __gwt$exception: <skipped>: Cannot read property 'tM' of null Of course I want to ...
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35 views

Random black screen when changing states

I'm making a game with LibGDX but I ran into a really odd problem. When I was working on the loading screen I delayed the loading process with an image of ~87MB. When the loading is finished, it ...
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5answers
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How to make sure that when two bodies collide, there is only one collision detection on box2d?

I'm using LibGDX with Box2D and, when two bodies collide, the collision is detected multiple times. Here's the code: public void preSolve(Contact contact, Manifold oldManifold) { Body a = contact....
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1answer
116 views

Raycasting. Corner trap

In my top-down game character moves to target (pathfinding) also avoiding obstacles with Raycasting(Central ray with whiskers), but situation like on picture causes shiver and unneeded turning (...
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2answers
816 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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17 views

Hotplugging LibGDX

Trying to find a work around to getting hotplugging to work with LibGDX (the latest version seems still like it doesn't support it). Anyone know of something I could do to get joystick hotplugging to ...
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1answer
23 views

LibGDX Rotate 2D image with touchDragged() event

Objective: to rotate an image in the center of the screen with movement equal to left or right touchDragged event. Right now I have a basic Stage that is created and adds an actor (centerMass.png) ...
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1answer
421 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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LibGDX Box2D Body shape transformation

In the following method my player Body is created: public static Body createPlayer (World world) { BodyDef bodyDef = new BodyDef(); bodyDef.type = BodyDef.BodyType.DynamicBody; ...
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1answer
20 views

InputProcessor without stage

I have a GameScreen where I'd like to have a pause button. I've tried using an Image with a listener, but since my GameScreen isn't a stage, I can't use that in the inputProcessor. So my question is ...
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2answers
127 views

Rotate sprite along the angle between two objects

Im trying to make flames follow my object, I set the direction for my moving object using the points between it and another object (using static destination for testing). No matter what I do I ...
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3answers
81 views

LibGDX - Trying to make a radar-like display

i have an interesting question about geometry. I have two or more moving objects outside of my stage's viewport (blue and red circle in the image below), which i want to point at with two arrows on ...
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2answers
568 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. ParticleEffectPool....
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Box2d Body filled with a texture Libgdx

I have a simple triangular shape (obstacle) in my game and i would like to fill it with a texture repeatedly. I have looked at the other 2 topics but couldn't find a working solution. How can i fill ...
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1answer
34 views

LIBGDX: Translate grid drawn with ShapeRenderer with an OrthographicCamera

I am trying to draw a grid for my "world" that may or may not extend beyond the screen. What I would like to do right now is draw the entire world (which is relatively small) and then use the ...
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109 views

LibGDX Box2D texture on dynamic generated body

I'm creating a game that is similar to hill climb racing. I've generated the ground and now I want to add texture to the ground. Here is a screenshot of a game Here is my code (I create ground using ...
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1answer
185 views

OpenGL(Libgdx) - How to texture a 2D terrain surface?

I want to texture the surface of my terrain. I have created the ground mesh and surface mesh separately and everything is okay for ground mesh. But I couldn't texture the surface mesh correctly. As ...
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LibGDX works well on android 4 and very bad on android 5 and 6

I have a problem with my game. The game is made with libgdx, scene2d and box2d and it uses an AssetManager. I tested this app on all my devices and here it is the results: Galaxy S3, android 4 (...
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Polygons and actionlisteners Libgdx

I've been browsing these forums for a while now and I nearly always am able to find an answer without having to ask my own question! Such a great community! This is the first time I've been stumped ...
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1answer
17 views

Scaling a single scalar using OrthographicCamera

I'm trying to convert a length (well, a radius) from world coordinates to screen coordinates using an OrthographicCamera. However, the only method I've figured out so far is to do a projection, with ...
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1answer
127 views

libgdx FollowPath proper usage

I'm developing top-down rpg game and got some problems using https://libgdx.badlogicgames.com/gdx-ai/docs/com/badlogic/gdx/ai/steer/behaviors/FollowPath.html I have a path (picture 1), in this case 2 ...
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1answer
87 views

Just how expensive is it to bind textures in OpenGL? (LibGDX)

I'm using LibGDX on top of OpenGL and currently my game engine does something along the lines of the following per frame Bind a terrain texture sprite atlas and a set of transparency masks in ...
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24 views

Color aura around object in libGDXs actor

my question is, if there is some easy mechanism to create color aura around actor in libGDX? Thanks for all tips
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A single libgdx gamescreen with pop-up menu, getting ready, hud and game over?

Is it possible and practical to have only one screen, like a GameScreen class, where the menu, getting ready (plus instructions), hud (only score) and game-over screens can pop-up when needed. Can I ...
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2answers
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Repeat texture in libgdx

How to fill region with repeated texture? Now I'm using next method: spriteBatch.begin(); final int tWidth = texture.getWidth(); final int tHeight = texture.getHeight(); for (int i = 0; i < ...
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2answers
188 views

Poor performance wth custom particle system in LibGDX

I'm using a custom particle system for my LibGDX / Java based game project (because I used Slick2D earlier on, need more parameters so I made my own and then ported). The system is fairly standard as ...
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LibGDX Gravity and Jumping

I'm trying to implement gravity and the ability for the player to jump in my 2D LibGDX game. At the moment, I have two handlers: One for gravity and one for keyboard input @Override public boolean ...
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0answers
28 views

Blur shader decals

Im trying to implement custom shader for decal GroupStrategy in libgdx, and I'm having some noob GLSL and OpenGL problems. I have implemented shader looking at this: http://xissburg.com/faster-...
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3answers
1k views

How to make an Actor follow my finger

I'm back with another question that may be really simple. I've a texture drawn on my spritebatch and I'm making it move up or down (y-axis only) with Libgdx's Input Handler: touchDown and touchUp. @...
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1answer
49 views

GLSL - Only draw arond point / flashlight effect

I'm currently trying to achieve a sort of flashlight effect in GLSL. I only want to draw textures within a certain distance of a specified point (the mouse position, for example). Here's a quick ...
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1answer
29 views

Libgdx - changing tiledmap smoothly, Tween engine maybe?

First question here, so bare with me if I make a mistake or two. Long story short I'm currently developing a side scroller game in java with libgdx, which uses tiledmaps from the tiledmap creator ...
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1answer
4k views

Confusion with Libgdx UI

I've started with Libgdx and am currently stumbling about trying to understand how to set up the interface. I have generated the base projects in Eclipse ( < proj-name >,< proj-name >-android, &...
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1answer
123 views

How can I draw multiple lines connected via “nodes” in libgdx Scene2D?

I have two Vectors which indicate the ending points of each line. I am trying to draw similar lines to football formation lines like these. My main problem using ShapeRenderer is: ShapeRenderer ...
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1answer
20 views

LibGDX - Shader not being applied

I've recently encountered a strange problem with my program and I can't seem to fix it. When I try to apply a shader to my SpriteBatch it doesn't change. I've debugged this problem like so: if (test) ...
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1answer
63 views

How to jump in Box2D with LibGDX

I am making a 2D platformer in LibGDX with both Ashley and Box2D. I have it so, that the PlayerControllerSystem watches for the jump key being pressed: // Jumping if (Gdx.input.isKeyPressed(...
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1answer
200 views

Change screen from main menu to game

I'd like to know how I can change the screen from the Main Menu to the Game itself but im having quite the trouble and I would appreciate the help. What I want to do is when I press btn.Play it ...
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1answer
57 views

How to check the memory leackage in libGDX game development?

I'm developing a multi-platform game in libGDX. Sometimes there is a huge issue with memory. The game used to stick a lot. In fact, I even used pooling. Is there any method to check the memory ...
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2answers
50 views

What is the difference between Sprite and SpriteBatch, specifically in the context of libGDX?

I'm using libGDX and I'm confused about the difference between the Sprite and SpriteBatch. Anybody can explain it to me in a simple way?
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87 views

LibGDX simple button with image

I want to make two image buttons (play, restart) in my main menu screen but I dont know how to do it. I tried this: Texture playTexture = new Texture(...) Image playImage = new Image(playTexture) ...