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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Libgdx distorted texture size

I'm just starting to learn LibGDX and have been having some troubles getting my world size to match with my texture size and box2d bodies. I have a texture 64x64 that I am trying to display but it ...
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19 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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36 views

Libgdx - Jumping, What am i doing wrong?

I really can't work out whats wrong with my code. I have an input listener for gestures, when I Swipe the position goes up on the y axis fine but he doesn't come back down, if with Gravity added. I'll ...
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Trying to get OOP working with libgdx [on hold]

I'm trying to use this player class for my entity stystem, but rendering isn't working right. I'm trying to have each class render on it's own by calling entity.render(); in my core application class. ...
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20 views

Shaperenderer not showing any shapes

I'm trying to use the shape renderer in LibGdx, but I don't see anything. I followed the docs as well, but nothing appears. Is there something wrong with my setup? public class MyGame extends ...
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1answer
62 views

How do I draw a circular portion of a texture within LibGDX using an OpenGL ES shader?

What is the simplest way to implement a shader to draw a circular portion of a full screen texture where the circle is dynamically resized as part of an animation using LibGDX? Is a shader even the ...
3
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1answer
95 views

Image edges are distorted inside game

I dont know how to explain this, so I will use images to describe my problem. The image I made using InkScape: What it looks like in-game (ignore the runner): As you can see the edges are not ...
2
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1answer
24 views

How to draw portion of a sprite in libGDX

Let's say i have a sprite like this: and i want to draw the lower portion of it, only the yellow color.. Initially the sprite has dimensions 10x10, i want it to be drawn 10x3 Do i have to ...
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30 views

Libgdx trying to get reflection of ball with plane in 3D space

I just cannot seem to get the right reflection result. Have tried reordering the operations but none seem to work. Hoping someone might tell me what I am doing wrong. Trying to accomplish the formula ...
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1answer
31 views

Pan camera within bounds of large image

I have a camera that I pan around a large image which works fine, however when I reach the end of the image I can keep panning on and on, forver. I have looked everywhere for an answer on how to ...
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2answers
58 views

LibGDX: Easy way to draw partial sprites

I am surely overlooking something, but is there an easy to draw for example only half a sprite in LibGDX? I originally thought I could do this with setBounds() but this distorts the sprite.
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GestureDetection Issues - How do I make my Actor jump on Swipe?

I've been trying to solve this for hours now, In theory I totally understand how the GestureDetector works but I'm trying to integrate it with the Libgdx SuperJumper Tutorial (for now). Here: ...
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Why should i set glClearColor and setProjectionMatrix in render method many time in LibGDX?

import com.badlogic.gdx.Game; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.g2d.SpriteBatch; public class MyGame extends Game { public OrthographicCamera ...
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40 views

Will Android apps made with libGDX be slower the normal Android apps? [closed]

What I mean if is if I made 2 identical apps one in libGDX and one in the normal SDK would the libGDX one be slower? I would think not because I believe libGDX still turns your files into .dex files ...
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35 views

Why do I get glitchy graphics when drawing scene with scene2D?

I'm trying to display a simple text for a menu UI using scene2D, but for some reason nothing is being displayed here. The screen displays pure black. public class ScreenMenu implements Screen { ...
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29 views

Body.getPosition returns NaN

I'm trying to create my own shooting Ai and for that I calculated at which angle the shooter needs to be depending on the distance from the target. The problem is that a whole lot of times I get this ...
2
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1answer
29 views

Java Libgdx: How do you add cells to a TiledMap?

I'm trying to make a Side-Scrolling game that will allow you to place/remove tiles. I'm using the TileMap Editor to render the custom Tilemap but is there any way to add tiles? I have it where I can ...
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1answer
33 views

Libgdx, tiled map - how to reload layer?

In the simple platform game I'm making, when player collects coin, its cell is set to null. Is it possible to recover all cells from layer "coins" after player dies? I have tried multiple things but ...
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2answers
33 views

ScrollPane scrolling velocity

I'm working with a custom ScrollPane, but I can't find how to change the velocity of scrolling (not on fling action). Can anybody tell me how reduce scrolling velocity on calling setScrollY() or ...
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1answer
34 views

Suddenly cant run project in libgdx anymore

Ok so in a sudden case of nostalgia, I switched my eclipse workplace from my working libgdx projects to an older one. After looking through my old stuff I had some problems switching it back, since I ...
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1answer
33 views

Checking if Body is surrounded by other Bodies

I'm trying to make a game like Rampart as practice. I have gotten to the point where I want to check if the castle is surrounded by walls and decide whether to fill in the area and continue the game, ...
2
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1answer
50 views

unable to use two gestures simultaneously

I have a class implementing gesture listener in libgdx. I want to use longpress gesture in one half of the screen and fling gesture in other part of the screen simultaneously. public class ...
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1answer
55 views

How to move objects in any direction by swiping with libgdx android game development

first of, I'm new to android game development so I don't know all the classes and dictionaries within android and libgdx. I'm actually following a game development tutorial for the first time ...
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33 views

(LibGDX/JAVA) How can I get a rectangle to rotate with this pendulum so I can start detecting collisions?

One of the objects in my game is a pendulum that swings in a semi-circle. This is done by having an update() method like this: public void update() { angleAcceleration = +1.81 / length * ...
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1answer
53 views

How to add a callback to addAction in scene2d

Sorry if this is a newbie question, I'm still learning libgdx. I'm using scene2d and I am trying to fade a tooltip into my scene and fade it out after 4.5 seconds. Everything is working in my code ...
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13 views

Connect lightsource with object in Libgdx

I want to make an minimalistic highway chase game in LibGDX, but I have a question. Can I attach a source light to an object so gravity will affect the source light, by pulling it down? One solution ...
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38 views

Sprites not being rendered on screen change - Android Libgdx

In my game over screen for my Libgdx Android game I've the following code which starts a new game upon a screen touch. if(Gdx.input.isTouched()) { ScreenManager.setScreen(new ...
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2answers
41 views

LibGDX Android project in IntelliJ

I've created a LibGDX project. I imported the build.gradle. The core and desktop modules are imported successfully, but the android not. So I add the content roots. The project compiles, I could build ...
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1answer
46 views

Game lags when my player collides with a specific object (solution known, unsure how to implement)

I'm developing a game in Android using LibGDX (although this is more of a JAVA problem than an engine problem). My aim is to have my player bounce off one spring onto another that will eventually take ...
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28 views

LibGDX Tiled Map - how to get embedded objects

I am using LibGDX to learn Game Development. I have reached the phase I am learning to use Tiled Maps. In Tiled map editor, there is a feature where we can pick a tile in the tile set, go to View -> ...
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1answer
56 views

Grayscale color mode texture not rendering in libGDX

I am about to develop a game completely in shades of grey using libGDX and just for testing purposes, i created two textures in photoshop: 2048 x 2048 plain white png image with RGB color mode of ...
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votes
1answer
24 views

libGDX's 2D particle editor launching incorrectly

What's going on? Here's my process: I first right-click the referenced library for gdx-tools.jar in Eclipse: I then search for the particle-editor class: It opens successfully, but half of the ...
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1answer
70 views

Is there any case to mix Android UI with LibGDX?

my question is about creating "non-playable" screens in games with the help of native android tools. For example, I have an Android LibGDX game (singleplatform), what should I use to provide start ...
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15 views

Libgdx - How to change GestureListener pan finger sensibility?

I implemented GestureListener in my Overlap2dStage to pan the camera when the player drags its finger over the screen. But I also have some actors that extend InputAdapter to detect when the user ...
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1answer
43 views

(Java) Trying to animate an arraylist of coins with a (working) animation class

I have a coin class which takes in an integer numOfCoinsand an enum LayoutType, which can be linear or curved. A linear layout displays the coins in a straight line one after the other - we'll work ...
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0answers
43 views

Using Box2D in LibGDX, is there a reason a fixture set to be a sensor would only -sometimes- detect a collision?

I am working on a 2D game in LibGDX. Currently, I am testing interactions between a player's weapon and enemies - in particular, a sword and an enemy monster. The player has a hurtbox and the sword ...
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1answer
169 views

How do I reverse this function?

I'm working on an isometric tile rendering engine and I need to reverse a function I used to translate the Cartesian coordinates into isometric coordinates. I've already written a function for this, ...
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1answer
35 views

LibGDX font issues

I've started creating a small project for the store with LibGDX. So far I only tested on PC, and everything went well. I'm using the gdx-smart-font library for font rendering. The fonts are looking ...
0
votes
1answer
39 views

LibGdx Table not firing touch events

I can easily add listeners to the actors within a table, and they will fire events, but if I want an entire to table to have 1 listener and do not care to have differentiated effects depending on ...
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1answer
27 views

LibGdx: How to check if VSync is enabled

I am just about finished my options screen, the only thing I need is some way of detecting if Vsync is enabled or not. I'm using LibGdx 1.5. I have tried to find an access to wglSwapIntervals, but ...
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49 views

Dijkstra Pathfinding in Libgdx, some minor problems

I'm having some problems with my Dijkstra implementation in Libgdx. I understand that there are already AI libraries that can probably do this much simplier but this is a school assignment so i'm ...
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53 views

player sprite hidden after using a stage (scene2d library)

What i'am doing is showing a tiledmap on the full screen , and it works fine. The character moves perfectly and the camera too. What i want is : Showing some text or imageButton over the map like ...
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2answers
55 views

Is using Game in libGDX for more than just switching screens a bad practice

I'm the process of refactoring the prototype of my game to use multiple screens using the Game - Screens model. I found some information (I think in more than one place) that the Game class should be ...
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1answer
37 views

OrthographicCamera and viewport not giving expected effect

I recently asked a question about this area that I think was too broad, so I will try a new approach. I have the following code I am experimenting with: batch = new SpriteBatch(); ...
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0answers
19 views

How to resize animation in libgdx?

I want to draw an animation, the size of each frame is 500x500px but when I try to resize, the animation seems to rotate... Here the code to load frames and create animation: Texture fireSheet = ...
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0answers
20 views

Scaling buttons in LibGDX

I'm trying to make a usable GUI for a Android game using LibGDX. But I'm having big trouble getting the fonts and buttons to a usable size. Scaling fonts work, but the results are not very pretty. ...
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25 views

Can't perform normal jump after applying revolute joint

I have encountered the following problem: I have two PolygonShapes which I had connected with a RevoluteJoint. The first body is called square the second is called weapon, before connecting the two ...
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1answer
84 views

LibGDX problems when switching screens and disposing: AL lib: (EE) alc_cleanup: 1 device not closed [closed]

I have to classes which implements the Screen interface. I'm trying to switch between these screens. I'm able to switch one time, but when trying to switch back, I receive the error: AL lib: (EE) ...
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0answers
21 views

LWJGL: getDisplayModes() on Linux with two monitors

When calling getDisplayModes() on a Linux machine with two monitors I only get one single resolution, that is, the current resolution set on the main monitor. However, calling xrandr directly gives me ...
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3answers
151 views

Using a basic shader in libGDX

Looking at https://github.com/libgdx/libgdx/wiki/Shaders, I have decided to try these shaders: String vertexShader = "attribute vec4 a_position;\n"+ "uniform mat4 ...