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.

learn more… | top users | synonyms

0
votes
0answers
16 views

Artificial physics : ball angle bouncing (Vector2) [duplicate]

My question is : how can I manage to move my object (ball) on a trajectory , and onContact with another object, it bounces, respecting the angle
2
votes
2answers
111 views

How to draw a rectangle or curve between two co-ordinates in libGDX

I am new to libGDX.I just want a Rectangle or a small curve drawn between the object and the clicked position .I know libGDX has RECTANGLE class. I just want to draw a rectangle or a curved line to ...
1
vote
1answer
41 views

How to match user click and the sprite object position in libGDX framework

I am using libGDX Java framework for developing a practice game in Eclipse. My game is in landscape mode and I am using sprite image for game assets. Actually I am trying to follow the Kilobolt ...
1
vote
1answer
86 views

Movement and rotation of bodies in top down game

We are developing a 2D top down game with libgdx using the included box2d as physics engine. We don't want our bodies to accelerate but to instantly move with the wanted velocity. The bodies are ...
0
votes
0answers
26 views

White background on BitMapFont

I've tried placing a white "background" on a font that is being rendered with LibGDX, with no success. I'm using the font.draw to draw the loaded font on the screen, but every way that I tried, the ...
1
vote
1answer
53 views

how to make different sprite when moving and aiming [duplicate]

I want to create top down game where you are Russian soldier in libGDX. The player controls the soldier with W/A/S/D and aims with the mouse. That way the soldier can run sideways and shoot towards ...
1
vote
1answer
95 views

Best mobile games resolution ratio

What is the best landscape and portrait resolution ratios that will fit the most of the devices out there and the black bars size will be minimum?
0
votes
0answers
31 views

libgdx get rotated sprite coords points

I would like to get the position of each edge of a sprite when he has been rotated. I have no idea how to do it, I made a image to explain it. I would like to get the X and Y position of each Red ...
-1
votes
0answers
31 views

Map in Scene2d/LigGdx

I'm a little lost for my game. For the moment I've a car, who work, but now I want to create a map (like hill Climb Racing for example, not necesserly randomly generated). I don't know how to do ...
0
votes
1answer
59 views

How to blend bullet sprite from white to yellow in libgdx

Does anyone have a clue that will make my bullet sprite fade from yellow to white? As the bullet is created it will be white but when it trails on it will turn yellow. Any ideas how? Is it a simple ...
0
votes
0answers
29 views

error reading atlas file

I follow this tutorial to learn how to develop some 2d games with libGDX: http://www.gamefromscratch.com/post/2013/10/02/LibGDX-Tutorial-3-Basic-graphics.aspx I am stuck at the TextureAtlas part. I ...
1
vote
0answers
46 views

Astar optimalization (A*) [closed]

So I have written own implementation of AStar (A*) algorithm to find paths around my 2d tile based map. My problem is that if I call it each frame (I need to do it) and I'm searching path from corner ...
0
votes
0answers
23 views

Libgdx get 3d intersection coordenate

Is there any algorithm that takes an arbitrary point coordinates as input and determines which is the 3d coordinate where the ray intersects the mesh? Use case: The mesh is rendered on the screen, ...
1
vote
0answers
88 views

Conceptual - What is the optimal way to combine steering behaviors with rigid body physics?

I am working on a simple 3D space simulator that makes use of the Bullet physics engine. The spaceships are rigid bodies that have a mass and hitbox so that they can be considered for collisions. At ...
2
votes
1answer
252 views

Maintaining velocity of free fall body using Box2D in libGDX

I want to maintain the speed of a free-falling Box2D body using LibGDX. I'd like the vertical velocity increase with the level. I've applied a linear impulse and velocity actually increases like this: ...
1
vote
2answers
37 views

(LibGDX) Changing Origin of Box2D World relative to TiledMap (or Vice Versa)

I'm playing around with Box2D and TiledMaps and I've come across this minor annoyance. As you can see, both Box2D and TiledMap render at the center of the screen. This forces me to compensate by ...
1
vote
2answers
65 views

How do I inline images between text in a Table?

I have a Table and a Label with wrapped text. I want to display some images in-line with the text. For example: This is an image -IMAGE_HERE-, and now some more text showing, yet, another image ...
1
vote
0answers
57 views

How can I transform a group of objects in libGDX?

I'm new in LibGDX. I created group with actors in show method and add listener (where i calculate rotation matrix) and want to rotate all actors from group with ...
1
vote
1answer
69 views

What is the delta value passed to the Screen's render method?

The delta value given to the render method in the Screen class is a non-constant number. What is it? Where does it come from? Does it differ by screen size?
1
vote
1answer
91 views

Game Update in Libgdx

In libgdx, the game loop is the render() method. But why is that, and is there a way where I can make an update() method that is called 60 times a second? As in the update() method, I would add the ...
1
vote
0answers
57 views

Rotating SpriteBatch clockwise

I have developed a 2D game that looks great on the Android. Now I want to make it cross-platform. For this I need to literally rotate everything when it is on desktop. I tried to do that by rotating ...
1
vote
0answers
66 views

LibGDX - Box2D: Realistic Light and Layers

I'm having some problems with my current game. Short description: It's a 2D game where you have to avoid the lights or you lose HP. My problem is the following one: Here is the rendering process: ...
0
votes
2answers
62 views

Artillery Simulation [duplicate]

I need some help on a simulation of an Artillery like this one https://www.youtube.com/watch?v=YktWSKo_UbA. I cant figure out how to make the "tomato" to get to the selected spot. Where can I get ...
11
votes
2answers
1k views

How do some mobile games scale graphics so beautifully? [duplicate]

I'm working on my first Android game and have been struggling a bit with scaling. I've got 3 test devices 800x480, 1920x1080 and a 2560x1600 tablet. Some games look near perfect on all of them - many ...
0
votes
1answer
114 views

Top-down player collision with walls

I am having trouble trying to think of how I am going to approach collisions in my game. My idea which sucked in the beginning because it would reduce performance dramatically has failed which was ...
1
vote
0answers
144 views

How do I implement a “sliding out of / into” effect on a settings menu similar to that in Angry Birds?

I'm trying to implement a settings menu component similar to that in Angry Birds - a button control that makes an options menu slide out of it and back into it when clicked on. I use scene2d.ui to ...
0
votes
1answer
92 views

Should I use tiles in a snake game? [closed]

I'm building a simple snake game, which is my first game ever. I'm using LibGDX, which is Java-based. I've looked at the Tiled Map Editor, but I don't know if it is necessary in a simple game like ...
3
votes
2answers
88 views

Blending semi-transparent images while not stacking their alphas

In libgdx/OpenGL ES I want to render multiple semitransparent textures while keeping the alpha still semi transparent. For example If I render a 0.5 alpha circle on top of another 0.5 alpha circle, ...
1
vote
0answers
46 views

LibGDX render sprites in tiled-map format ( convert texture to sprite )

I am creating a game in which till now I have used textures to create A 2D tiled game. I have created a matrix which converts the touch co-ordinates into a array index number and according to that ...
0
votes
2answers
123 views

Efficient way to check collision with potentially hundreds of objects [duplicate]

I am trying to make a top down shooter that could potentially have hundreds of objects at once at one point. I need to check collision with projectiles, walls, and enemies. I am currently using ...
0
votes
1answer
24 views

Actors (Label) not being drawn to stage [closed]

I have a weird issue that when I try to draw a Stage with only an Actor, a Label to be more precise, added to it and nothing seems to be getting drawn. This is how my setup goes: I have a Sprite ...
1
vote
2answers
198 views

libgdx - collision detection with tiled map java

currently, I am working on a 2d rpg game which is similar to final fantasy 1-4. I can load up a tiled map and the sprite can walk freely on the map. However, I will like to create a wall for it to ...
1
vote
1answer
87 views

Change game from portrait to landscape dynamically

I have multiple classes that implement Screen. I want to, say, have the Main Menu screen portrait, then the Play Screen landscape. Is there anyway of changing the orientation dynamically? I thought ...
0
votes
1answer
63 views

LibGdx and in-game fonts - any proven methods?

I use 3 sizes for fonts in my game: small, medium, and large. I take the base font size and attempt to scale the font based on screen size and density, but this is proving to be pretty hard. Does ...
0
votes
0answers
72 views

Libgdx TileMap size limitations

I have a tmx file of 800*18 size.. It is working but there is some problem like sometimes game is slow or the player jumps too much high or the collision from ground doesn't happen properly and player ...
2
votes
1answer
56 views

Libgdx Get Font Height with a Wrap

is possible to get the 'Height' of a font drawed with the drawWrapped methods (with a wrapWidth) ? getMultiLineBounds only works when \n is used, but when drawing with drawWrapped it doesn't give the ...
0
votes
2answers
283 views

How do I make a background fill the whole screen in Libgdx?

I'm using this code to set a 800x420 image to be full screen: public void show() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new ...
1
vote
1answer
77 views

How to make platforms spawn without touching other platforms

So I am making a doodle jump like game where there are platforms scrolling by but right now how I have platforms spawning is completely random. I would like the platforms to be spread apart so they ...
0
votes
0answers
94 views

glsl fragment shader work diffrently on different devices

i'm making a 2d android game where i have a mechanics that allow the player to move the camera away from the main character, and to not allow him to explore the hole world, a have create a Fog shader, ...
-1
votes
1answer
42 views

Stop diagonal selection in my Match-3 game [duplicate]

I have a matching game where the user drags their finger over items to select them. The problem is, i only want the user to be able to select items by dragging vertically or horizontally, not ...
1
vote
2answers
83 views

How can I fix my sprite being rotated 90 degrees more than toward the mouse?

I am trying to get a Sprite in LibGDX to look at the player's mouse. Here's the code I have (mind you, I am using JRuby): target = mouse_position.sub(spatial.position) rotation = ...
1
vote
0answers
90 views

How should matrix-based Parallax Scrolling work?

The question is at the end, as it requires a bit of context. I'm not sure if my understanding, my code, or LibGDX's ParallaxCamera is wrong. LibGDX's ParallaxCamera uses Matrix4s to achieve a ...
0
votes
0answers
20 views

How do I scale and rotate around different points in Libgdx? [duplicate]

I'm using a SpriteBatcher to rotate and scale a TextureRegion in libGDX. I'd like to rotate the texture around an origin outside of the region, but have the texture scaled around the region's center. ...
0
votes
3answers
114 views

Why is my texture drawn in a different place when in fullscreen?

I'm trying to draw a texture (with a crescent moon) in the middle of the y-axis: public void draw(SpriteBatch batch) { batch.draw(lune, 0, Gdx.graphics.getHeight() / 2); } It renders this when ...
0
votes
1answer
125 views

Units, Layers, and Isometric Ordering

I'm currently using LibGDX and Tiled map editor to render isometric maps. I'm having a two related difficulties. The first issue is, when do I render units that will end up changing position often ...
0
votes
2answers
162 views

LibGDX Android version

I am trying to use the LibGDX UI Project creator to create LibGDX projects, but it doesn't allow me to choose the Andorid version for the project. This is a problem for some android features. For ...
0
votes
0answers
16 views

LibGDX MVC - Where I should put resources [duplicate]

I want to use a MVC pattern to develop a small Game like SpaceInvaders. But dont know, wether I unterstand this pattern right. First of all, I try to explain how I understand this pattern. Model: ...
5
votes
2answers
127 views

How to make part of the Texture not to be scaled.?

I am new to LibGdx, i was doing one example for my learning and struck with this question, i had searched in google but i am not able to find the answer for this. 1) How to make part of the Texture ...
0
votes
1answer
108 views

isometric coordinates issue: (0,0) and (5,5) are flipped?

I am having an issue with the isometric coordinates. When I enter the coordinates (5,5), the character should be at the bottom corner of the tile, but it is at the top corner, (5,5) and (0,0) look ...
0
votes
0answers
19 views

libgdx : Scrolling background from spritesheet causes lag when sprite is repositioned… am I doing something wrong? [duplicate]

So, I use a sprite from a spritesheet to draw the background and repeat it. (I am drawing it twice) However, the moment that the background is re-positioned to make it look infinite, it causes a lag. ...