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: movement of scrolling background is not smooth even at 60fps

I'm developing a game and I want to make a sliding background. The background is not scrolling smoothly. I logged the fps, but it was ok. This is my code, I don't know what I'm doing wrong, any ideas? ...
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1answer
2k views

How to start an animation just once on an event in libGDX

I am trying to show an explosion animation which i created using a few textureregions and created Animation missileblastAnimation from those textureregion like this -- > TextureRegion[] explosion = ...
6
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1answer
2k views

How can I create a fade effect between scenes in Libgdx?

I have implemented a screen fade with Scene2D. It currently fades fades out of one screen to black, then then from that black into the next screen. It would be really awesome if I could fade ...
2
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2answers
330 views

How do I make a puzzle piece move smoothly between locations?

I'm building a 2048 clone to sharpen my Libgdx skills, but I don't know how to ease a tiles between board locations. When I slide my finger, the tile moves rather swiftly. How I can make the movement ...
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2answers
1k views

How can I make a snake's tail follow the head?

Following an assignment and just getting started with libGDX by building a small Snake clone I've run into an issue that I'll probably be ashamed for in a little while. I currently have a snake's ...
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2answers
234 views

How to implement “move to touch location” function?

What is the formula/logic to implement moving an object towards a TOUCHED location. I want character A to move to my finger and it must be accurate. Here is what I have tried so far: @Override ...
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2answers
929 views

Matrix rotation wrong orientation LibGDX

I'm having a problem with matrix rotation in libgdx. I rotate it using the method matrix.rotate(Vector3 axis, float angle) but the rotation happens in the model orientation and I need it happens in ...
2
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1answer
3k views

Libgdx collision detection and response

I am trying to create a simple platformer game with libgdx. I implemented a collision detection for the player's bounding box with the map's tiles using the Rectangle.overlaps method. In response I ...
2
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1answer
174 views

Using Box2d to model rotating turret

I would like to model a rotating "turret" on top of a tank-like object in 2D from the side view like pictured here: Notice the faint outline of a gun protruding to the upper left courtesy of ...
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1answer
430 views

Parse and iterate over SVG path

I need to parse a SVG path expression like m8,295c-4,-292 441,-291 446,-26c5,265 440,263 442,-9 and have a way of iterating over it in [0 ... 1]. I looked into Apache Batik but it doesn't seem to ...
2
votes
1answer
689 views

RGBA values not coming as intended | LibGDX

As it states, my RGBA values aren't coming out the way I want it to be. My RBGBA values are As it states, I am trying to create a orange tinted color on my game. 221, 189, 98, 0.7 I am using a ...
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2answers
293 views

Conditionally use java or android classes

I'm using bezier curves in my libgdx project. I was testing the desktop version using java.awt.geom with GeneralPath but when I went to test on android, it raised an error saying that I can't import ...
2
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2answers
2k views

How do you create fnt (angelcode format) files from existing bitmaps?

I often gets the same problem: Someones creates a nice bitmap font for me in form of a sheet nicely formated into a png, like this: ...and i need to create the angelcode .fnt atlas for using it ...
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1answer
203 views

Libgdx Box2d createfixture crashes vm intermittently

I have a hard to debug problem. I have a Box2D game which creates a wheeled vehicle. I want the vehicle body to reflect when it goes from moving left to moving right. to do this i set a flag in a ...
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0answers
496 views

Libgdx and ParticleEffect with scene2d not showing the same way as in the Particle Editor

I am developing a new game with libgdx and trying to implement ParticleEffect in scene2d (using actor). I am creating a ParticleEffect with Particle Editor in which I would like to add to a stage. ...
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1answer
93 views

my movement is working good on keyboard but on android its not

So basically here is what my movement is like for keys: key down if (keycode == Keys.LEFT) { mishi.getAcceleration().x = -13; } key up if (keycode == Keys.LEFT) { ...
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1answer
444 views

Most efficient way of brighten and darken sprites with OpenGL > 2.0

So I have been shading (brighten/darken +adding color) my sprites by using glTexEnvf with GL_MODULATE and GL_ADD and a vertex color. I only had to rebind the batch every time I needed to change from ...
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1answer
1k 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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2answers
545 views

Why is my text is too large even when scaled to .05f in libGDX?

I'm trying to scale down my fonts as my game objects are also small. I'd like to scale them down the same way as my sprites. However, if I scale them below .05, the font disappears! My attempt at ...
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1answer
652 views

Two issues with testing LibGDX on Android

1) When I test my game on desktop it is 100% fine. When I test it on my Nexus 7 physical device, it is the same except the backgrounds have no color. For example my splash screen has a greenish ...
5
votes
3answers
2k views

Creating Platform game with Inclined Levels

Till now I have developed platform games in which a player can only move and detect tiles linearly. I wonder on how to implement games in which a player can move on an inclined or irregular surface. ...
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1answer
895 views

How do I combine images into a single entity in libgdx?

I've googled this but can't seem to find anything on "concatenating" two images, especially with libgdx. Any ideas?
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1answer
181 views

SelectBox in LibGDX doesn't display and freezes the program after a click

I am currently trying to apply an overlay with LibGDX over my 3D ModelBatch. Everything works fine except for the SelectBox. Once instanciated, it shows up on my screen I can click on it once but then ...
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0answers
176 views

Incorrect click event when resize on libGdx

I want to use scene2D, in libGDX, to detect click on object. I have this simple Game sample : Stage stage; @Override public void create() { this.stage = new Stage(1280, 720, true); ...
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1answer
268 views

How to add a nice looking muzzle flash to the tip of my guns [closed]

I am making a top down shooter and would like to add a muzzle flash to the tips of my guns. So I have an idea of what I want to do which would be just a circle that would fade from yellow to white or ...
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1answer
73 views

Is there any reasons to make sprites and bodies line up?

So in LibGDX the Sprite objects position is where it's 0,0 mark is in the word. In Box2D a a bodies position is in it's center. So to line these up when you update the sprites position with the ...
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votes
2answers
777 views

Publish android game only for 800 x 480 resolution in portrait mode

I have developed a game in libgdx. I worked for long and after finishing, I found that the game runs perfectly only on devices with resolution 800 × 480. I found this solution: ...
3
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1answer
425 views

LibGDX How to take screenshot and use as background for pause screen

So I am trying to take a screenshot of the current situation during the PlayState of the game and when the player pauses the game I want the game to take a "screenshot" save it in memory and not as a ...
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1answer
455 views

Libgdx stage rendering issues

I'm using scene2d for the first time, and I can't get anything to draw EXCEPT the stage ui. Say I have my ui on top of my game screen: uiStage.act(): batch.begin(); gameSprite.draw(batch); //does not ...
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0answers
1k views

Resize the Texture Region (parallax background) to fit my screen size in libgdx

I am using libgdx to make a running game. I am using vertical parallax background. I have successfully implemented parallax background many times. But for this game, I want my Texture region to fit my ...
2
votes
1answer
577 views

How do I split a texture into differently shaped pieces with libgdx?

I want to split a texture into variously shaped pieces with libgdx, like the pieces of a puzzle game. TextureRegion.split() is not an option, as it splits into equally sized rectangular texture ...
2
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1answer
200 views

How do I dynamically set a WheelJoint's anchor points?

I've created a car in RUBE and imported it into my game. The game has a tuning menu, allowing the ride height of the car to be adjusted with a slider. I can't work out how to change the position of ...
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2answers
2k views

How do I render a rounded rectangle in libgdx?

I've been thinking of ways to render a rounded rectangle in libgdx. I haven't found a pre-built way in the documentation. I've looked at: ShapeRenderer, but that's apparently quite expensive ...
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2answers
198 views

Best practice for handling “dead” objects and their particles

I'm developing a side-scrolling run'n'gun game (but with planes! :P). I'm an experienced coder, but new to game development. When an enemy plane collides with a friendly missile, I start an explosion ...
5
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2answers
4k 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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1answer
468 views

Libgdx. Converting Screen Click Coordinates into World Coordinates for 2D Game

I'm using the InputHandler's touchdown method. It gives me my screenX and screenY. Is there a simple way to convert screenX and screenY to world coordinates? By my understanding, InputHandler returns ...
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1answer
150 views

How to keep track of previous scenes and return to them in libgdx

I have three scenes: SceneTitle, SceneMenu, SceneLoad. (The difference between the title scene and the menu scene is that the title scene is what you see when you first turn on the game, and the menu ...
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vote
1answer
559 views

Aspect ratio in LibGdx

I'm learning LibGdx and I need some help with the camera. Let's see, I'm making a Chu Chu Rocket! clon to start. I've loaded a TiledMap (10x10), and I've created an OrthographicCamera to show the ...
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1answer
186 views

LibGDX: Miscalculated polygon collision

These 2 polygons are not colliding, though this method returns true: Intersector.overlapConvexPolygons( new float[]{ 100.0f, 750.0f, ...
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0answers
110 views

Slowdown in sliding background with Libgdx

I´m new with libgx and i have a basic question. I want an background like an image that repeats indefinetely, and moves down. I did with 2 images and it worked, but the problem is that is very slow. I ...
0
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1answer
708 views

What is the approach of creating an image puzzle game with libgdx

I would like to create a game which consists of taking a random image, slicing it up into some number of pieces (according to a selected difficulty) and letting the player solve the puzzle. I've ...
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2answers
299 views

How to use the zoom gesture in libgdx?

I found the example code for the GestureListener class, but I don't understand the zoom method: private float initialScale = 1; public boolean zoom (float originalDistance, float currentDistance) { ...
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vote
1answer
224 views

How to poll input for a gui in libgdx?

Ok, so my question is simple. How do you poll input with a GUI class without it affecting what's underneath the GUI? So suppose you have an RPG game with a gui for the d-pad and other controls: ...
1
vote
1answer
906 views

libgdx: Rotate sprite on 3d plane

Im trying to create a game on a 3d plane but with 2d objects. I have a perspective camera and the ground plane drawn. I can't seem to get sprites onto it. I am trying to render the sprites, then to ...
4
votes
2answers
282 views

How to make a smooth circuit path in Universal tween engine?

I tried to make a circuit by starting at point A, with waypoints B and C and final target at A again, and infinite repeats. What happens is that the path from A to B, B to C is smoothed, but path C to ...
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votes
1answer
4k views

Why doesn't my android application rotate when I rotate my screen

I am building a game in LibGDX and the game screen orientation is in landscape. I want it to stay in landscape but I still want the user to be able to flip the device onto the other side and the ...
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votes
3answers
772 views

Exception in thread “LWJGL Application”

I'm using libGDX for my android game in which I'm trying to use bitmap fonts. I have created .fnt and .png bitmap files using Bitmap font generator of angel code.Both .fnt and .png have been placed ...
0
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1answer
965 views

How to clear out a drawn texture from the screen in libGDX

I am trying to clear out the drawn texture from the screen. Lets take a classic game example - in many games when the character goes through the coins the coins clears out from the screen and ...
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1answer
486 views

libGDX without android dependancies

I want to create a game that due to some assumptions doesn't make sense as a tablet game. I already created some frame (controllers, autowiring, build scripts, etc.) that would help me later on, but ...
0
votes
1answer
2k views

LibGDX cannot save to internal file

I want to save the state of the game in a file, so I can read it at the next start. The Problem is, that I get a exception, if I try to save something internal. If I try to save it local all work ...