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

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2D Lighting Glitch

I've been working on a game in Java, and recently I decided to try out my game on a netbook just to see how it would run. While I do get a constant and decent FPS, it appears that my lighting ...
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3answers
510 views

2D Side Scroller Game Without A TileMap

I want to create a 2D side scrolling game in a similar style as the game "Castle Crashers". (Go to: http://store.steampowered.com/app/204360/ to see some pics of the game). I have experience ...
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1answer
487 views

LibGDX Box2DLights shadow offset problem on bodies

Hello I just started to use LibGDX, and it's awesome. I looked at the Box2DLights library, and started to learn how the lighting work here. I got something up: As you can see, it works, but the ...
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2answers
143 views

How do I scale a rectangle image while retaining its border thickness?

I want to create a programmatically scalable image like this: scales to . Both have a one pixel border. If I scaled from the first to the second in Paint.NET, there would be a two pixel horizontal ...
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2answers
78 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 ...
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1answer
122 views

How should I go about protecting my script files?

I am working on a small multiplayer game with a whole bunch of scripting components. I know I can't store my files in plaintext otherwise anyone would be able to change the functionality of core ...
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1answer
136 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 ...
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2answers
582 views

Should game objects draw themselves? [duplicate]

Assuming you have classes like Player, Enemy, Map and Tile. The first approach to structuring rendering code would be to give each a render() method and let it draw itself: void render(){ ...
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1answer
306 views

How can I kill a libGDX AsyncTask immediately?

Is there any way of killing a running AsyncTask immediately in libGDX? The AsyncExecutor that submits it seems to just have one method (dispose()) that kills all the AsyncTasks that it handles after ...
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1answer
112 views

Drawing chunks, and positioning the camera

I've seen many questions and answers regarding how to draw tiled maps but I can't really get my head around it. Many answers suggest either loading the visible part of the map, or loading and ...
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2answers
359 views

Full map image loading, vs individual tile loading

I want to make a isometric tile game in java, like a lot of strategy games out there. What is the best approach to loading the map for this game? Would it be better practice to load one single image ...
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1answer
71 views

How can I show information from a variety of sources in my debug menu?

I'm creating a debug menu, and I want to be able to show a lot of information (variables) on that menu. This information will come from a lot of classes (instances). How can I show a lot of ...
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1answer
149 views

AI and rendering to screen

I'm using LWJGL, however I'm a bit confused on what to do. I'm trying to write an AI simulation, however I'm stuck at this problem. I have one camera, and I plan to move the camera to the mob ...
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1answer
645 views

Quaternions, Axis Angles and Rotation Matrices. Which of these should I use for FP Camera?

After 2 weeks of reading many math formulas and such I know what is a Quaternion, an Axis Angles and Matrices. I have made my own math libary (Java) to use on my game (LWJGL). But I'm really confused ...
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1answer
462 views

Making Ball Fling in a Curve Direction

I was wondering how to figuring out how to slice a ball (banana kick) by flinging it curve-ways. However, according to the LibGDX's gesture listener, the method for flinging only focuses on a straight ...
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2answers
161 views

How do I derive the angular movement for a craft

I have the regular (linear) motion implemented like this: class Craft{ ... Vector location, velocity, acceleration, angularVelocity, angularAcceleration; ... //the move class responsible for linear ...
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2answers
326 views

Endless terrain in jMonkey using TerrainGrid fails to render

I have started to learn game development using jMonkey engine. I am able to create single tile of terrain using TerrainQuad but as the next step I'm stuck at making it infinite. I have gone through ...
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2answers
579 views

best structure to handle entities in an entity component based game engine

I am trying to develop a 2D entity component based game with multiple layers as tilemaps (front or back from the scene). I currently handle the tilemap layers in a 3 dimension array[z][y][x]. Each ...
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2answers
162 views

Calling opengl32.DLL from java?

I don't like LWJGL in some cases, so I prefer to use Swing. The thing is that Swing doesn't have OpenGL. I have tried JOGL and it's a mess to install, needs external jars, and I have yet to get it ...
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4answers
318 views

Java Slick2d collision feedback [closed]

I'm trying to build a collision response ( it uses vectors2f from slick2d ) so that enemies don't overlap on each other so basicly what I'm doing right now is, I loop trough all enemies in array ...
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1answer
640 views

Java Slick2d Delta ( time )

In Java slick2d , i started printing out Delta which is supposed to be the time and it prints out is 16 or 17 forever, so how does this help me if i want to tell an object when it needs to do ...
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1answer
333 views

Cost of changing scene in andengine

I'm working on a simple 2d puzzle with small textures (in count and quantity). Now after I finished the game logic I'm considering tow options to switch between levels: Remove all objects manually ...
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2answers
641 views

Removing the titlebar while using slick2d?

I recently started using slick2D in my gaming programs and a problem I have is not having the ability to remove the border/titlebar. I usually do this to create my own cutom look/ interface but if I ...
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1answer
2k views

How to render a tilemap efficiently? [duplicate]

I'm using this code to load a tiled map, composed of 1000x1000 32x32px tiles: map = new TmxMapLoader().load("levels/xyz.tmx"); camera = new OrthographicCamera(); camera.setToOrtho(false, ...
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2answers
934 views

Why cant I use slick-util with image IO and bufferedImage

My problem is that I get errors when I use texture = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("TEXTURE PATH HERE")); it gives me these errors: Exception in thread "main" ...
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1answer
234 views

Ways to represent/store different regions in a non tiled map

I am developing a game where agent tribes fight each other for land.The map is a 2D map.Each agent has an instance of group object that represents their family.And each group object contains ...
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1answer
126 views

Deciding when to switch focus between UI elements

I've been coding a simple logic game recently and there is a UI decision that has been bothering me. Since certain blocks of logic are going to be used across many levels (e.g. logic to reverse the ...
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1answer
266 views

Mapped texture to a gluSphere not wrapping correctly

I have a 3D sphere rendered using JOGL by means of GLUquadric. I'm trying to add a texture but it is not rendering as correctly. Does anyone understand why the texture (upper-right of sphere) isnt ...
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2answers
247 views

Tween Animation Cannot Start

Do you have any reasons why my tween code didn't run or work? I already add the tween engine onto the library folder under LibGDX project folder and "Order and Export" it under Java Build Path at the ...
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1answer
1k views

Moving sprites on a graph in libGDX

In my game I'd like to move sprites on a fixed path. Until this point I was trying to stick with the tools already provided by libGDX, like the Tiled map renderer classes so I'm looking for a solution ...
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1answer
3k views

LWJGL - Mixing 2D and 3D

I'm trying to mix 2D and 3D using LWJGL. I have wrote 2D little method that allow me to easily switch between 2D and 3D. protected static void make2D() { glEnable(GL_BLEND); ...
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2answers
730 views

which is better performance, using a disposable local variable or reusing a global one?

This is for an android game. Suppose I have a function that is called several times for second and do some calculations involving an arraylist (or any other complex objects for what matter). Which ...
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1answer
322 views

Saving a list of points into a text file

I recently posted a question about this, but was not really sure where to go. I've gotten some progress, and have generated some simple noise here: http://pastie.org/5408655 That works well enough ...
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1answer
492 views

How to make this game loop deterministic

I am using the following game loop for my pacman clone: long prevTime = System.currentTimeMillis(); while (running) { long curTime = System.currentTimeMillis(); float ...
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1answer
501 views

Rotating a cube using jBullet collisions

How would one go about rotating/flipping a cube with the physics of jBullet? Here is my Draw method for my cube object: public void Draw() { // center point posX, posY, posZ float ...
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1answer
512 views

Color based collision detection

I am making a game where you fly a ship around some randomly generated planets. Since I am using a for loop to draw over 5000 planets, using the rectangle class or an oval-type class for this is not ...
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1answer
155 views

how do I add development build number each time I compile and play? [closed]

I wanted each time I play my game, it will show in the console how many times you compiled or run the game. How do I do that?
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1answer
358 views

Fixed texture size (Pixel) libgdx, java

If I resize the window (e.g. fullscreen) the texture size also changes! I want that behaviour: If I change to fullscreen you will see more of the game world. The size (Pixel) of the texture stay the ...
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1answer
2k views

PokeMMO. How they do it? [closed]

Well PokeMMO is a JAVA game project which basically is the original FireRed title for the GBA made online. They know this type of projects don't last long because of the copyrighted material used, but ...
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2answers
4k views

LibGdx drawing weird behaviour

I am finding strange behaviour while rendering TextureRegions in my game, only when pausing it. I am making a game for Android, in Java with LibGdx. When I comment out the line "drawLevelPaused()" ...
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1answer
639 views

AndeEngine Parallax / Sprite Depth?

What I'm attempting to do is create a game in which a space ship explores a large area of space. I'm randomly generating placement of planets, space stations etc. I want to use the ...
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1answer
638 views

Box2D platformer movement. Should i mess with velocity?

I have a platformer game in which I implemented the movement using a wheel attached to the hero. For jumping I use this: player.body.applyLinearImpulse(new Vec2(0, 30000000), ...
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1answer
3k views

Using NinePatch in libGDX for Loading Bar

I am trying to create images for a loading bar in libGDX. I came across the NinePatch class and I was hoping to use it for this loading bar, since stretching images with a plain Texture or Sprite ...
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1answer
5k views

Waiting specific time to increase sound libgdx

I want to wait a moment (.5 seconds) before I increase the sound, how can i achieve this without using Thread.sleep, because i want my game to keep runnig.
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1answer
808 views

Relating a point after an image is panned and zoomed

For Android, let's say you have a image of a map that you draw inside your view. On this map there are many, many "hot spot" locations where you want your user to be able to select. Given that there ...
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2answers
2k views

How can I use an object pool for optimization in AndEngine?

I have read up on a tutorial that allows you to reuse sprites that are re-added to the scene such as bullets from a gun or any other objects using an ObjectPool. In my game i have a variation of ...
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1answer
2k views

Andengine Traffic game: moving sprites along path on map

I'm developing simple traffic educational game like https://market.android.com/details?id=cz.allianz.krizovatky.android . When the player taps on car sprite, it started to move with other cars. If ...
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2answers
157 views

Observing particular Port for measuring network game performance

How can I check/inspect the performance of some network application via observing the port it used, I want to test the performance of my network game. If my game is using port 1009, how can I check ...
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2answers
520 views

Problems with Creating Snake's Clone on Java

I'm creating Snake's clone. My app have too classes: Snake.java and Board.java. Right now I have three problems: 1) There are two constants - BOARDS_WIDTH, BOARDS_HEIGHT. They are meant to be ...
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2answers
741 views

[JOGL] My program is too slow, how can I profile with Eclipse?

My simple opengl program is really toooo slow and not fluid. I'm rendering 30 sphere with simple illumination and simple materials. The only complex computing stuff I do is a collision detection ...