Questions tagged [libgdx]
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.
2,295 questions
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Best practice design for libgdx scene2d/box2d in different levels
I've started a libgdx game using scene2d and box2d. It's a 2D top down game, in which you can walk through the world, enter houses, etc. (think of Stardew ...).
I'm wondering, what is the best ...
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Objects move with different speed on different devices
I was making a 2d top-down game, but when I tested it on two devices (Samsung M31 and Samsung S25) there was a problem with player speed - it was faster on S25 and slower on M31. I tried using some ...
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LibGDX NullPointerException from a scene 2D Actor calling Pools.obtain()
fire (Event event) method throws the NullPointerException. Trace:
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How to drag existing body to another position?
I have a game object with a Kinematic body and a sprite. The object's "draw" method will always position the sprite to match a position of actual body, so the sprite is completely passive.
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Consistency of accelerometer controls between devices
I'm thinking of making a game where using the phone accelerometer, the player would apply an appropriate force (adding velocity) to a Box2D body. Now, I know technically how to implement that, but I ...
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Why is my raycast not working?
I'm trying to ray-cast mouse clicks to the surface of a sphere (from which point, I'm going to get the coordinates of the vertex of the sphere's mesh that are closest to the click). The following ...
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Icosahedron missing triangles
I'm trying to create an icosahedron (I've been trying to figure this out for about a week).
Basically, I followed this article to create an Icosahedron mesh in code, and the positions of the vertices ...
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LibGdx sprite isn't rotating correctly around its own axis
I'm currently trying to rotate a sprite around its own axis to make it "face" the mouse, but I'm having weird results. This is my code:
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How do I add dependencies to my libGdx project?
I am currently using libgdx and IntelliJ to develop a real-time space 4x game. I ran into an issue, where I am trying to include lua scripts in my project (for the sake of allowing players to mod new ...
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LibGDX TiledMap - get embedded objects from TextureMapObject
Is there a way of getting embedded objects defined within Tiled's collision editor from TextureMapObjects?
It'd be great if I could place texture objects around on an object layer and also include ...
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Bullet Physics stopping model from going through static object
Bullet physics tunneling problem:
yellow box(dimensions: 2f, 2f, 2f) that falls under gravity. Its Bullet Physics are set as such:
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Differences between rotations and translations of different camera properties in LiBGDX
I am trying to understand the camera API (applicable to perspective camera ONLY) of LiBGDX.
It really does not make sense that you can call rotate and translate on many different properties of the ...
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Rotate modelinstance node about its own centerpoint y axis in LiBGDX
I am trying to rotate the node of a modelinstance as follows:
Note: the node and modelinstance are rotating BUT not about their own center Y axis!
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Separate Sword Sprite from Player
I am aware that a common approach in game development for attack animations is to separate the player from the weapon and 'stitch' them together at runtime, depending on the weapon equipped.
This ...
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Finding a modelinstance in LIBGDX from a Scene by node id
I have loaded a 3d scene from Maya into Libgdx: It has two polygonal objects(meshes)
One object is labeled as: chamber
The other object: it has another name
I load the Maya scene as such:
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Modifying the transform of a modelinstance in libgdx
Using libgdx I need to move back and forth by a very small amount a soldier head:
I do the following: But the soldier head is flying up into the y axis out of the screen:
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Understanding vector2 set in Libgdx
I am trying to understand why in the following code the programmer user vector2.set() ?
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How to save score without resetting to 0 between Game Scene and Pause Scene?
I'm currently working on a LibGDX Java Game Project inspired by the Space Invaders game where I have created 2 Scene Classes: LevelScene and ...
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LibGDX websockets GWT html app cant find source to WebSocket class
I'm using this library to connect to websocket server:
https://github.com/czyzby/gdx-lml/tree/master/websocket
It's working on android/desktop applications, but when compiling to html gwt app with ...
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LibGdx switching between multiple UI panels
Let's say I have a game screen with a game world stage and UI stage. UI has a build button in the corner which should open a full screen build menu window/panel while hiding game world and the ...
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I use skin composer, I want to create scene in scene composer, I can't add text buttons even though I created text buttons
I create text buttons, add every image and font, but it's still disabled when I want to add button in scene composer. I'm probably doing something wrong.
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libgdx resize works fine, except on setWinowedMode
I'm a bit baffled by a specific bit of behaviour in LibGDX.
The resize method of my screens is as simple as can be, because right now I don't need anything more:
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Modifying LibGDX vector2's seems to do nothing
I have a piece of code similar to this:
Vector2 test = new Vector2().setLength(20).setAngleDeg(45);
But when I'm trying to print its contents (such as ...
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How to adjust parabolic trajectory to hit the same point with the same launch angle, but faster speed?
I'm launching a ballistic projectile similar to this sample.
The projectile moves from the launch point to the target point, but it's too slow. When I try to increase the speed without changing the ...
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How to improve performance of LiBGDX Android app?
After creating a few bodies and a map with collisions, the app performance clearly goes down. However, RAM and CPU don't seem fully stuck, but the game experience is horrible nonetheless.
GameScreen ...
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Animate buttons sliding in
I am developing my first libGDX game.
I want to animate the buttons on the stage, so they transition into view instead of just popping into appearance. For example, each button should slide in from ...
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How to render picture-in-picture effect with libGDX camera
libGDX cameras are mostly used for layered rendering with different "world unit size," but I wonder is there a way of showing the view of for example a libGDX Orthographic camera in the ...
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How to add text on screen using bitmapfont in libgdx?
I have a function class that implements Screen with a bitmapFont variable in it
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Pass input event from stage to added actor
I am diving into libgdx and used their sample game as a starting point.
I also added a touchpad to move the bucket. That was kind of easy and worked flawless.
My additional idea was to make the ...
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Fix stuttering with fixed time step and interpolation
I am trying to fix my stuttering by using a fixed time step, but I seem to be missing something because it is not working.
Can someone look at this and see what is missing?
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Libgdx zoom and pan the map at the same time
I was able to do the zoom logic and pan logic, but like in google maps, I want to be able to zoom to the map and at the same time pan the map near to it.
Example
starting position:
zoom to kennedy ...
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Libgdx table contents are expanding beyond widget bounds
I have a libgdx table that initially looks like this...
And I'd like the last cell to expand so that the logical bounds fill the widget bounds. As soon as I set the last cell to expandX it looks like ...
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Tile system Meta data
I am creating a strategy game in LibGDX with a tile system and destructible tiles. I am using an array of enums to represent the different types of tile, eg:
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LibGDX Invalid animation during actor rotation
I have a problem with the animation when setting the actor's rotation. Every now and then the server sends an updated actor's rotation position. The client uses interpolation to smoothly update the ...
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Timer for enemy up and down java/libgdx
I want to make the selected enemy increase position.y by 1.0 and after 1.5 seconds return to the original position. I already use a timer of 2 seconds because I need to select a random enemy every 2 ...
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Libgdx World point to screen point
It seems like converting a screen point to a world point is easy in libgdx but going from the world point to a screen point is quite tricky.
So How do I convert a world point into a screen point?
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Draw more sprite but they disappear
I have a array of sprite in a class "Enemy", I want to draw enemies in some positions, but when I draw one, the previous one disappears.
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Drawn enemy random on different position
I would like to insert random enemies in the map in different positions. It's possible?
This is how i load image of enemy:
Enemy.java:
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reposition object in circle
As you can see on the image, I have a p1 and p2 objects with (x,y) coordinates which I know the values, and I know radius of all these circle objects.
However, I want to calculate new position x,y ...
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Fade in with stage libgdx doesn't work
i use a stage on my background but the fadein doens't work. This is my code:
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Create a transition fade out in libgdx
How can i create a fade out in libgdx? I have a class "Menu" and with a fade, i want to change class to "Game".
This is how i change class, from "Menu" to "Game"...
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LibGDX - My sprite glitches when it moves
My player sprite glitches when it moves across the screen. I've tried multiplying movements by delta time. I've tried rounding. It seems to do this completely at random. Sometimes I can move it all ...
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Can I use Libgdx to create a game that runs on multiple platforms?
I created my first game using Libgdx and Android Studio. The game runs smoothly on my Android phone. How can I run it on an Apple phone with IOS or a computer with Linux etc.?
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Error using Asset Manager for loading files from Android temp directory (libgdx)
I'm creating a game for Android using libgdx and Google Firebase for storage. In my Loading screen I download a file from Google Firebase Storage and store it in a temp file. After the dowload ends ...
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How to not resize but move widgets when screen resized?
I have added buttons to my code, but when I go to "resize", they get bigger or wider and it looks very bad. How can I resize the window and keep the button aspect ratio?
This is my code:
1)...
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Orthographic camera in libgdx does not work with constructor when passing viewports size
I am playing around with LibGdx and its OrthographicCamera and notice something, what is really strange for me. I mean if you look into the code below you will see that I am initialising ...
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Box2D Body cannot be serialized. How to ignore or serialize it successfully?
In my game, which implements the network functionality with Kryonet, I would like to send a class ("MyBox2DComponent") over the network which e.g. contains a field of type Body (Box2D).
Of ...
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HashMaps with String keys as animation keys okay?
In my project I use an ECS system. I have a SpriteComponent that contains a map of animations.
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Libgdx OrthogonalTiledMapRenderer doesn't render properly
I will simply leave a clip of it as it's easier than describing the problem.
https://i.sstatic.net/bBAVC.jpg
This is All the code that i have
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Is there an algorithm for a Joystick class that happens to be engine/framework independent?
I need to be able to get the given input's distance inside the joystick, bounded within -100% and 100% and an unbounded version of it, get the position of where the mouse's position projects to the ...