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.
41
votes
6answers
4k views
Which image format is more memory-efficient: PNG, JPEG, or GIF?
Which image format is more efficient to save memory? PNG, JPEG, or GIF?
15
votes
2answers
738 views
Graphics not being displayed on OUYA
I hope its not too early to be asking OUYA dev questions, but I just got my dev kit and I want to get my game running ASAP! I am using LibGDX as my framework for my game and launching the Android ...
10
votes
4answers
15k views
Where are all the tutorials for libGDX?
I've searched online for help and tutorials on LibGDX but I couldn't really find any, except and the wiki for asking questions on stackexchange. Besides the source (demos) and wiki, is there any other ...
10
votes
1answer
2k views
How can I define a complex collision area on top of a tile map?
As many people recommended, I am using Tiled map editor to create a map for my game and it's great particularly because libgdx framework also provides with API for maps from Tiled.
I understand I can ...
8
votes
2answers
1k views
Play videos with LibGDX
Is there a way to play videos with LibGDX?
I want to put a video as my splash screen in Android, but I dont want to use the Android SDK, because I am using LibGDX and I am almost finished :/
8
votes
2answers
283 views
How well do functional languages perform on Android?
This is a special case of this question that I feel is particularly pertinent.
I'm working on a game for Android, and I'm planning on using Scala with libgdx. I'm planning on making a performant ...
6
votes
1answer
150 views
How to force a line break before the last word of a line reach the edge?
I'm printing a sliding text by adding each letter after a short period of time. My problem is that when the text multilines, the last word of a line starts on the current line and jumps to the next ...
6
votes
1answer
673 views
What methods should save/load a game state
There are a lot of articles about how to save a state of a game and they are pretty good. But I have one conceptual misunderstanding where should I save the state?
My game has number of screens and ...
5
votes
4answers
375 views
Making a Box2D ball bounce to constant height
I want to create a game like Doodle Jump. I'm using libgdx and Box2d. I needadvice on how to make my ball bounce constantly and with the same height.
I've tried setting the ball's body restitution ...
5
votes
3answers
601 views
Understanding how to create/use textures for games when limited by power of two sizes
I have some questions about the creating graphics for a game.
As an example. I want to create a motorbike. (1pixel = 1centimeter)
So my motorbike will have 200 width and 150 height. (200x150)
But the ...
5
votes
2answers
250 views
Is it legal to pack LibGdx libraries in my jar file? And to obfuscate them?
I'm using LibGDX and deploying a runnable jar file, using the Eclipse feature, with libraries extracted into it. There are also .so files and .dlls inside.
1 . Is it legal to do so? I didn't find ...
5
votes
1answer
1k views
Box2D Difference Between WorldCenter and Position
So this problem has been brothering for a couple of days now. First off, what is the difference between say Body.getWorldCenter() and Body.getPosition(). I heard that WorldCenter might have to do ...
5
votes
3answers
389 views
Libgdx optimization of big arrays
I am working on a game using libgdx and I have the following code that I want to optimize.
Array<Bullet> enemyBullets = Enemy2.getEnemyBullets();
for (Bullet bullet : enemyBullets) {
...
5
votes
3answers
4k views
Resolution Independence in libGDX
How do I make my libGDX game resolution/density independent? Is there a way to specify image sizes as "absolute" regardless of the underlying density?
I'm making a very simple kids game; just a bunch ...
4
votes
4answers
461 views
More efficient in range checking
I am going to use a specific example in my question, but overall it is pretty general. I use java and libgdx.
I have a ship that moves through space. In space there is debris that the ship can ...
4
votes
4answers
2k views
How do I make an on-screen HUD in libgdx?
I'm new to libgdx, and I am finding I am getting stumped by the simplest of things. It seems to want me to do things a specific way, but the documentation won't tell me what that is.
I want to make ...
4
votes
4answers
2k views
Why do I get this file loading exception when trying to draw sprites with libgdx?
I'm having trouble with the "Drawing Images" section on the libgdx tutorial. I set up the documents completely and I typed the code as follows:
public class Game implements ApplicationListener {
...
4
votes
1answer
690 views
LibGDX - Check if currently on Android/Desktop
I'm using LibGDX and flixel-android to build a Desktop/Android game. It feels like there should be a way of checking to see if you're currently being run on an Android device, the Desktop, and so on, ...
4
votes
2answers
2k views
Advantages and disadvantages of libgdx
I've been an android developer for a while and am thinking about getting into gaming. While looking for a game dev framework, I thought libgdx provides very friendly documentation and functionality. ...
4
votes
3answers
5k views
LibGDX tutorial help Scene2D
I'm having trouble understanding this tutorial. It defines the importance of classes, but it doesn't show an outline of the project file so far. From what I got from that tutorial was that there is ...
4
votes
4answers
4k views
2D Platformer Collisions
I've basically asked this question before, and I know it's been asked probably a billion times, but I still can't seem to do it. All I want to know is how I should go about doing basic 4-way, ...
4
votes
1answer
3k views
How to use particle editor for libgdx?
In the libgdx wiki, this particle editor is recommended. And this blog was helpful. But the problem is that I am not sure yet how to use it for my game. Let's say I want to have a fire-effect in my ...
4
votes
1answer
1k views
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 < ...
4
votes
1answer
598 views
SQLite in libGDX
Does anyone have an example of how I can use SQLite in libGDX? I have a class in my original Android code that allowed me to easily access a database but I can't seem to find anything equivalent to ...
4
votes
1answer
2k views
libGDX Multitouch Controls
Has anyone had any trouble implementing multitouch on-screen controls in libGDX, such as multiple joysticks? I've tried and I can't seem to get libGDX to play nice with multitouch/multiple pointers on ...
4
votes
1answer
3k views
Is libgdx fit for 2D game development on Android or are there simpler alternatives?
I'm looking for a Java framework to develop 2D games on desktop and Android. I've looked at Slick and I really like the API, however the developer himself says if you want a framework for Android and ...
4
votes
1answer
324 views
Mario like jumping and landing in box2d, help
I've been trying to get Mario type jumping/landing in a Box2d game and it's been giving me some trouble.
Results: Player loses velocity on landing
Desired Results: When player lands it will continue ...
4
votes
0answers
249 views
Isometric - precise screen coordinates to isometric
I'm trying to translate mouse coords to precise isometric coords (I can already find the tile the mouse is over, but I want it to be more precise). I've tried several different methods but I seem to ...
3
votes
3answers
2k views
Changing the color of a sprite at runtime
Is there a form to change the color of a sprite in runtime?}
I have a black point loaded with an image, but i dont want to load various images with different colors, is there a mode to change the ...
3
votes
3answers
200 views
When is it best to load screens in mobile games?
In the develpment of a mobile game, is it a good to load all the screens at the start of the game, or destroy and create new ones during the game? I am doing the second thing, because I suppose that ...
3
votes
1answer
2k views
sprite display does not match its body in box2d
I found about this using debug renderer. When game starts, everything is in order. But when some collision happens, sprite's rotation is way larger than its body. When sprite and body match is the ...
3
votes
2answers
1k views
How to make a background fill the screen on different-resolution phones?
I am developing my first Android OpenGL game. It's a 2D game and I would like the background to always fill the screen. I've managed to achieve this by stretching the texture to fit the size of the ...
3
votes
3answers
180 views
Libgdx body passing through block then fall on it
I'm using libgdx and its physic engine Box2d. My question is : how could I make my box2d body go through a block , ignore the first collison than make the block active so the ball can fall onto it. A ...
3
votes
2answers
185 views
Bitmap Font Displays in Center Always Without Coding it Manually (Fix Coordinate Problem onText)
Is there a way on how to stay the texts in center without manually coding it or something, especially when making an update? I'm making a display for the highest score. Let's say that the score is 9. ...
3
votes
1answer
1k views
How can I track a falling ball with a camera?
I have been trying to get my camera to follow a falling ball but with no success.
here is the code
float cameraY = (FrustumHeight / 2)+((ball.getPosition().y) /2) - (FrustumHeight /2);
...
3
votes
2answers
177 views
Creating stable tentacle structures
I am using verlet integration to simulate some tentacles. So far it works great and I am satisfied with how it looks in general. Here is how a tentacle is built:
The very stiff sticks are colored ...
3
votes
1answer
113 views
Cut a translucent square in a texture
How to remove (cut-out) a transparent rectangle in a Texture, so that the hole will be translucent.
On Android I would use the Xfermodes approach:
...
3
votes
1answer
147 views
Fill texture with white color
How to paint texture with white color? Example what I mean:
SpriteBatch.setColor changes tint only.
3
votes
1answer
474 views
Getting Bodies to go “Super Fast” in Box2D
I am making a breakout game in Android using the LibGDX version of Box2D. I have a ball that I am applying a force to with the following code...
getBody().applyForceToCenter(-10000000000.0f, ...
3
votes
2answers
2k views
Vector images (SVG or other formats) support in libgdx or other Android framework?
I'm looking for a website to create games for Android. I'm interested in something that supports vector images. Do you know if libgdx supports them or is there a convenient way to use them in libgdx?
...
3
votes
1answer
325 views
Photon alongside LibGDX
Can anyone point me to a possible implementation of the Photon network engine along with LibGDX for Android? Or any multiplayer networking SDK for all that matters.
From reading source code it ...
3
votes
1answer
2k views
How do I move the camera sideways in Libgdx?
I want to move the camera sideways (strafe). I had the following in mind, but it doesn't look like there are standard methods to achieve this in Libgdx.
If I want to move the camera sideways by x, I ...
3
votes
1answer
2k views
Using the AssetManager in LibGDX
I am trying to use the AssetManager class in LibGDX and I understand how it works but I am trying to implement a loading screen. I have followed the AssetManagerTest.java file here, but I am having a ...
3
votes
2answers
517 views
Detect if a sprite has left the camera in libgdx?
Is there a method to know if a sprite has left the camera of the stage? or I have to do my operations? :P
3
votes
2answers
108 views
How To Correctly Extend the Sprite Class in LibGDX
I am currently pursuing game development as a hobby, and have run into what seems to be a conflict in my mind regarding how to properly (using best practices) extend the Sprite class in LibGDX (or for ...
3
votes
1answer
517 views
Weird error with opengl in Android using Libgdx : “EGL_BAD_ATTRIBUTE”
I am having a weird error when uploading my game in the phones.
E/Adreno200-EGL(5128): qeglDrvAPI_eglGetConfigAttrib:484>: EGL_BAD_ATTRIBUTE
I am uploading the textures with AssetManager.
I am ...
2
votes
4answers
529 views
How to Make Objects Fall Faster in a Physics Simulation
I used the collision physics (i.e. Box2d, Physics Body Editor) and implemented onto the java code. I'm trying to make the fall speed higher according to the examples:
It falls slower if light object ...
2
votes
2answers
443 views
Move Camera Freely Around Object While Looking at It
I've got a 3D model loaded (a planet) and I have a camera that I want to allow the user to move freely around it. I have no problem getting the camera to orbit the planet around either the x or y ...
2
votes
3answers
251 views
How to force a garbage collector swep on libgdx?
I found that you can control your memory usage on libgdx with:
int javaHeap = Gdx.app.getJavaHeap();
int nativeHeap = Gdx.app.getNativeHeap();
But, How can I force a garbage collector cleanup? I ...
2
votes
3answers
326 views
How can I create a spritesheet animation with big images?
If I have a 200x200 pixel sprite, and I want to create an animation for it with 30 different frames, how can I accomplish that? I can't put them on one texture/spritesheet.
