Java is both a popular object-oriented programming language and runtime environment which allows Java programs to run unchanged on most hardware and software platforms.

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0answers
29 views

balloon ligher than air with libgdx, impementation of FixtureDef.density, gravityScale, linearDamping?

I use libGdx/box2d's physic. My intention is to create a balloon filled with helium (a body, what hovers above a surface, if we apply a little force to it - it moves fast but not far, if we push ...
0
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1answer
46 views

glGenArrays - This functionality is not available

Whenever I call glGenVertexArrays(), I get the following exception: Exception in thread "main" java.lang.IllegalStateException: This functionality is not available. at ...
0
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3answers
118 views

Procedural generation of stars in the background with given random seed

I want to generate stars (actually a 2d vector) in the background. The player is moving left and right endlessly. When the player moves the stars, which aren't in sight anymore, should be deleted from ...
0
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1answer
91 views

AI for Minesweeper like game

I am currently developing a Puzzle/RPG game which works a little bit like Minesweeper. You have a Field of Tiles and 2, 3 or 4 different colors from which you can choose. Now you have to uncover tiles ...
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0answers
19 views

Java how to wrap text

Hello I have a game where you hack into computers(not real ones :P ). You can type the command ping and it pings to your address in real life. It returns something like this: Pinging 192.168.6.1 with ...
0
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1answer
61 views

Getting positions of static entities in a Tiled Map

I'm creating a 2D game that uses a Tiled Map with an underlying 2D array to store where entities are in the world. At the moment, I'm just creating one instance of an entity, assigning it a number, ...
1
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2answers
74 views

How can check a collision between 2 non-axis aligned boxes?

I'm making a simple and easy game and I need to detect the collision between 2 boxes. It only needs to return trueor false, no physics involved. I started working and couldn't find an algorithm that ...
0
votes
1answer
17 views

Triangle data structure not working for LoD algorithm

I would like to implement a LoD algorithm to my 3D game in order to simplify meshes at certain distances from the player. My meshes are created / loaded using a VBO, so the vertex data is stored in a ...
1
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1answer
34 views

How do I query a LibGDX Box2DLights “light” and “dark” regions?

I have lighting implemented using Box2dLight. I want to update/render things inside the player's PointLight area. Stuff in the dark area should not be rendered. How can I find which areas are lit or ...
1
vote
1answer
26 views

LibGDX viewport touch coordinates transformation

I've been trying to get LibGDX's viewport and camera unproject() to work and so far none of the tutorials/answers I've found have worked for me. I have a game window of 840x480 units with ...
1
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0answers
58 views

Libgdx performance on old devices

I'm developing a game in Java for Android, using LibGDX. I'm using Nexus 5 to test my game most of the time and it works great (Minimum FPS it gets is 57 out of 60). Recently I ran my game in Galaxy ...
0
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0answers
22 views

GLFW/LWJGL black screen flicker issue

Im having a problem with creating a borderless fullscreen window in LWJGL using GLFW. It creates the (in this case black - as intended) window, however when the focus changes (f.e. tabbing int/out), ...
7
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1answer
194 views

Tiling perlin noise seamlessly, but without repeating to generate an infinite 3D world

I have been working on a 3D game in java using LWJGL for a while now. I am trying to make procedurally generated infinite 3D terrain that is generated around the player. So far I have: 3D terrain ...
1
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4answers
60 views

OpenGL calls from a different thread?

I understand OpenGL is not thread-safe, but at the same time, Google seems to be giving me mixed responses. I have a LibGDX game that functions normally, UI/rendering/logic on the same thread, ...
1
vote
1answer
54 views

libGDX: Why doesn't Gdx.input.isKeyJustPressed() work?

I'm trying to use the method Gdx.input.isKeyJustPressed() to check if the Android BACK button was just pressed. I don't want to use the Gdx.input.isKeyPressed method to avoid multiple calls. Here is ...
0
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0answers
28 views

How to “pause” stage actors listeners

I have a problem with multiple stages and listeners in libGDX. I have GameScreen with gameStage (contains game elements), uiStage (score label and pause button) and pauseStage (resume, restart and ...
1
vote
1answer
46 views

How can I add a transparent overlay to a UI in libGDX?

I am attempting to use the following code shapeRenderer.begin(ShapeRenderer.ShapeType.Filled); shapeRenderer.setColor(3,3,3,.3f); shapeRenderer.rect(0,0,gameWidth,gameHeight); ...
1
vote
1answer
38 views

Objects phasing through each other in physics engine

I'm writing my own physics engine right now (following this tutorial), but I'm running into some problems. Sometimes on collision, objects will just phase through each other instead of bouncing off of ...
3
votes
1answer
74 views

Does libgdx implement the game loop for you?

Initially, I assumed that the developer has to implement the game loop because libgdx is a library - not an engine. But then I found out that Graphics has getDeltaTime() and getRawDeltaTime() so I ...
5
votes
1answer
266 views

Why does flipping 1 texture region cause an identical texture region to also be flipped? (libGDX)

Sorry for the bad title. I didn't know how else to explain it. The following is a portion of my code: public class AssetLoader { public static TextureAtlas spriteSheet; public static ...
0
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0answers
22 views

boost/geometry replacement in Java/for the JVM (Destructable Box2D terrain)

I'd like to reimplement https://github.com/seemk/DestructibleBox2D in Java. The main problem is finding an adequate replacement for the boost/geometry library. Any ideas?
0
votes
1answer
20 views

Displaying Images Correctly

So, I've been working on several smaller game project in past few months, and I've got the hang of game dev in java. Now I'm trying to optimize game performance. Is it ok to simply use ...
1
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1answer
39 views

libgdx Vector.cpy question

Why do people use this: public void set(Vector2 v) { this.vector2 = v.cpy(); } insted of just using: public void set(Vector2 v) { this.vector2 = v; } What I don't know that I should ...
0
votes
2answers
43 views

Java how to rotate an image towards a certain point?

Hello I have a game where a spaceship flies towards a different point every time I press a button. I am able to rotate the image but I don't know how to rotate the image to face the direction it is ...
1
vote
1answer
30 views

Scale smaller resolution to full resolution libGDX

Short question about the scaling in libGDX. At the moment i have a application with the resolution 480x320. I define this in the main method of the desktop launcher. My whole application is now ...
0
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0answers
13 views

How To Make ModPE Perform Function The First Time Mod Opened

I am making a Minecraft PE mod and I want to set a variable only on the first launch of the mod. So, how do I make it it set the variable and then not set it again until I import the mod again. ...
1
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2answers
62 views

Java Game how to make image follow line?

Hello I have a game where circles rotate around the centre of the frame. When I click on two circles a line is drawn between the two circles. The circles are always moving and so is the line. I have ...
0
votes
1answer
44 views

AssetManager proper usage in libgdx

I am a beginner in libgdx and I am coding a simple game. This game is like a word puzzle where each letter is a texture. Before loading the first level I need to load into memory 26 textures, one for ...
0
votes
0answers
20 views

Raycast trouble

i'm having some trouble with the RayCast. I'm raycasting from the player position and my mouse position. I have this situation : http://i.imgur.com/h7iplnY.png (the white line is a representation of ...
2
votes
1answer
55 views

Drawing textures off screen optimization required?

I recently started using LibGDX and I am wondering if I have to optimize my code when drawing textures/sprites off-screen, just like I used to do with XNA. My biggest concern here is specifically ...
1
vote
1answer
81 views

How to use mipmap with TextureAtlas and AssetManager

I searched on the Internet but couldn't find the way to use mipmaps with libGDX TextureAtlas. I want atlas instead of normal textures because as far as I know mipmap supports only 2^n width and height ...
1
vote
0answers
34 views

How to render/load world chunks? (Java) [closed]

I am developing a top down 2d rpg called "MasterQuest", using Graphics2D in java. Most of the code that I have written has come from my own head, and this is really the first time that I have had the ...
0
votes
1answer
51 views

Stop rendering hidden objects libgdx

I currently am hiding objects that are not in the frustums view. However, some objects are still being rendered that are in the frustums view, but are hidden. My goal is to not render objects that ...
0
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0answers
48 views

Minecraft Modding - How do I use OpenGL stencil functions alongside the game's GlStateManager?

Note: I am using Minecraft Coder Pack 9.10 for game version 1.8.0 (official release). I am trying to make a multiline text field similar to the game's original net.minecraft.client.gui.GuiTextField. ...
1
vote
2answers
193 views

Swing GUI for games (performance)

I'm developing a game in Slick2D and I'm trying to make GUI. I've already tried TWL library, but it seems to me a bit complicated and it doesn't cover what I need. In my own implementation of GUI ...
1
vote
2answers
171 views

LibGDX Game vs ApplicationAdapter

When I create a new LibGDX project the main class of Core project extends ApplicationAdapter. Here is how it looks like. package com.marimba.apptest; import com.badlogic.gdx.ApplicationAdapter; ...
0
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0answers
45 views

LibGDX with Parallax Camera, unable to accurately select objects

So, basically I borrowed the ParallaxCamera test that LibGDX provides and got the camera set up rather nicely. However, I noticed that when I specify a speed other than 1, my game objects shifted ...
0
votes
0answers
19 views

LibGdx scaling properly

I've mad use of view ports and they do what they say they do, but the problem is I'm not able to get it to scale the whole world with it. The game is for android which it looks nice on but desktop is ...
0
votes
0answers
49 views

LWJGL - First time trying to implement shadow mapping

It's my first time when I implementing shadow mapping. My problem is shadows don't work in any way. First I just render all of the object to a FBO with simple shader. shadowMapGenerator.vs: #version ...
0
votes
2answers
77 views

A* Implementation Produces zig-zag in positive directions

I have an implementation of A* in Java. I followed this guide http://www.policyalmanac.org/games/aStarTutorial.htm. But I noticed that the paths generated where the goal is in the positive X and Y ...
0
votes
1answer
77 views

How to make “Events”/ Scripted Scenes

I want to make cutscenes etc, in my game. I thought of a similar System like in the RPG Maker: If you enter a certain Area, a list of commands and arguments is played. E.g. like this: [Move ...
-2
votes
1answer
24 views

single Key press [duplicate]

I have my following (static) KeyListener http://pastebin.com/gR1i3Xzb and this is my update Method: @Override public void update() { input(); /*...*/ } private void input() { ...
1
vote
0answers
49 views

Blinn-Phong lighting on Voxel models

I'm creating a game that is going to use voxel models. However I got stuck when I coded my shader using Blinn-Phong algoritm. Here is how it look (Only care about the red model): As you can see ...
2
votes
1answer
46 views

How can I repeat a Texture Region in libGDX

I have a texture that is part of a sprite sheet. I want draw the texture to cover a certain length, but I want it to repeat not stretch. However,when I use the following code batch.draw(hillBottom, ...
4
votes
1answer
210 views

LibGDX input y-axis flipped

I'm writing a game in Java for Android using LibGDX, and I connected my phone so I can test it on it. I know that LibGDX's render system works different than regular Java systems since the 0,0 ...
0
votes
0answers
25 views

Filling the viewport area of a orthographic camera with an image (libgdx)

So im trying to get the whole area of the viewport and then use the coordinates to draw images in the camera's viewport. So if the camera moves I can fill it with one image the length and the width of ...
0
votes
1answer
110 views

What is the correct approach to implement multiplayer in a game? [duplicate]

I'm developing a game and it is intended to be a multiplayer game. I have experience in writing servers and clients in Java, but the game is written in C++. The server will be written in Java for ...
0
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0answers
29 views

Issue with texture mapping on a spehre using opgengl es 2.0

I have a problem to calculate the right UV coordinates. I'm calculating the sphere by subdivate a ocathdron. What did I do wrong? Calculate UV Points for the texture: private ...
2
votes
1answer
65 views

Using world coordinates instead of pixels

I've been told that having a set pixels-per-world unit number is bad practice because it will not look the same at different resolutions. Because of this, I am trying to learn about using abstract ...
1
vote
1answer
41 views

LWJGL: loading textures of various types

I googled around a bit and nobody seems to have asked this question. I have images in multiple color formats (all of them are PNGs). Most of them are ARGB but my bitmap fonts are gray scale, and I ...