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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how should I network my turn based game?

I'm writing a very basic turn based strategy game which allows a player to select units and attack enemy units on their turn. The game is written in Java using the slick2d library and I plan to use ...
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Java - 2d Array Tile Map Collision

How would I go about making certain tiles in my array collide with my player? Like say I want every number 2 in the array to collide. I am reading my array from a txt file if that matters and I am ...
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Adding a short delay between bullets

I'm having some trouble simulating bullets in my 2D shooter. I want similar mechanics to Megaman, where the user can hold down the shoot button and a continues stream of bullets are fired but with a ...
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How would I use JBox2d in Java?

So I did some research and a found Box2d. I then proceeded to download it and the testbed. Now that i have it, I don't know how to properly use it. I'm looking for a clear simple answer on how to ...
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173 views

Controlling access to my game

I'm getting near the point where I'm going to be ready to release an alpha of my game. I'm curious as to how to implement a system where the game is un-launchable if a user name and password haven't ...
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227 views

With flash/flex games talking to backend, is it pull only or can the game server push?

With flash based games (or flex), is it a pull or request/response system or is it possible for the game server (say java based) to actually push out to its remote flash clients?
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539 views

Collision Problems in Pacman Clone

I am working on a Pacman clone. I am using Java for the project. I have been having problems with collisions, and allowing the player to pass through objects. Note that the tile size (and player) is ...
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562 views

Polygon Collision Detection Android

I am starting to try and figure out polygon collision detection in my Android game. I am currently doing pixel level collision detection and it just seems to be too slow (though it works). I was ...
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297 views

How do I determine if a tile is a slope based on the tile image?

In my game, every tile is a 32x32 texture. All the slopes are a 0 - 45 degree angle. I would like to determine, at the time I load the tile, if the is sloped by examining its texture/bitmap data. How ...
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How to install java 3d in ubuntu

I'd recently asked a question for getting started in game development from where I was suggested for the book "Killer Game Programming-Java". On the page there is a java 3d program which needs to ...
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3answers
910 views

Any ideas on reducing lag in terrain generation?

Ok so here's the deal. I've written an isometric engine that generates terrain based on camera values using 2D perlin noise. I planned on doing 3D but first I need to work out the lag issues I'm ...
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144 views

3D Location Handling

I am thinking about making a simulator type game that will involve having lots of small objects in a 3D space. What is the typical solution for handling these objects? The first thing that comes to ...
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848 views

2d very large tile based game, zoom and pan considerations

what's a sensible way of implementing zoom and panning for my game? each tile is very large, 100,000 x 100,000 pixels, with some objects possibly being only a single pixel at maximum zoom (small ...
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470 views

How do I calculate logical velocity / direction?

I have a simple jBox2D (Java) implementation of a world with couple of Circle bodies that at the begining are static. I want to make them movable when the user touches the circle. But I want them to ...
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1answer
1k views

Are there any top down view sources available for SLICK/LWJGL? [closed]

I've been working with java for a few months now with my girlfriend and we're moving along at an expected rate. I understand the concepts of OOP, we've built many pseudo code starter games from ...
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708 views

Tetris style game in java (for now) will I need to use threads?

I'm looking at developing a puzzle game, it might be like tetris or something similar, perhaps more like bejewelled in that the player will select objects with the mouse to manipulate them. I've ...
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1answer
479 views

Network Abstraction for a Java Game Messaging System

I'm currently working on an online java game. Currently building the messaging system between the client/server and I came across a big if. I am not experienced as a game programmer, only worked with ...
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3answers
228 views

Java graphic objects as in flashgames

How is it possible (with the standard Java2D engine) to use small sprites like graphic objects? For those who don't know what I mean, in all those Flash-games like on Facebook they put small sprites ...
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1answer
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How to use OpenGL blend mode/functions to brighten/darken a texture.

Tried this code, but the texture didnot get any lighter. try { texture = TextureLoader.getTexture("png", ...
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454 views

Adding objects to the environment at timed intervals

I am using an ArrayList to handle objects and at each interval of 120 frames, I am adding a new object of the same type at a random location along the z-axis of 60. The problem is, it doesn't add just ...
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Slick 2D first trial error

I followed some advices to learn Slick2D and when I started doing the "SimpleGame" I got my first error. Does anyone have any idea of what is it and how to fix? Sun Dec 26 23:09:12 GMT-03:00 2010 ...
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1answer
51 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: ...
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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?
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Swing for game development - regarding threads

For those of you who use Swing to develop their real-time Java games. (Meanign a game that constantly updates game state and redraws the screen using a constant loop). As I see it, there are three ...
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84 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 ...
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1answer
96 views

Pixel Perfect collision detection on rotated bitmaps [duplicate]

I have two bitmaps which are being drawn onto a canvas using a matrix canvas.drawBitmap(bitmap, matrix, paint); first to work out if I need to check for a collision i am using eucilidean vectors ...
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1answer
43 views

How can I check for key releases between keyReleased callbacks?

Slick2D's Input class has a isKeyPressed() method that returns a boolean value according to whether the specified key has been pressed. I want to check if a key has been released in the same fashion. ...
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1answer
86 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 ...
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1answer
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How should I implement a Game Over menu in Android?

By Game Over menu, I mean a menu displayed when you die, with an option to play again. I have two approaches in mind: Use OpenGL Have some button textures ready. When the character dies, draw ...
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1answer
52 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 ...
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116 views

Circular dependency when creating entities

I have the following problem: I have a a class called Stage, that keeps an list of entities, which it iterates over every update loop, and updates them. One of these entities might be a weapon (PEW ...
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1answer
63 views

Get Tile Location On Screen (Java Slick and Tiled2D)

I want to create a rectangle around each tile that's blocked value = true. How can I find the X and Y (on screen) coords of the each individual Tile?
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1answer
118 views

How can I drag a polygon based on a mouse-moved event?

I have drawn a polygon in Java using java.awt.Polygon. I want to move that polygon with the mouse (by dragging it). I know that I have to use mouseDragged method in addMouseMotionListener. That way I ...
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87 views

need help in implementing KeyListener for 2D game in Java

i stated coding my first game in java, i need some help in imlementing KeyListener to fit my game. after some search in tutorials i've imlemented it like this : frame.addKeyListener(new KeyAdapter(){ ...
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102 views

Is the Key Bindings delay unavoidable in Java when pressing different directional keys quickly?

I've read just about every tutorial I can on why to use Key Bindings instead of implementing the KeyListener interface, including all the examples that show using a field to track the key event ...
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148 views

Should I use object references or integral values to store pieces in a chess board?

just a general question regarding a checkers project. I built a class hierarchy for the game pieces (that could be extended for chess etc). The hierarchy looks something like interface GamePiece() ...
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76 views

Java: creating an instance of a user defined class by reading xml file

I am trying to write an engine for a game, in particular a component-based one (in my approach components contain both data and logic). So basically I have entities, and each entity has a list of ...
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1answer
142 views

TCG - how to program cards as separate entities

So I'm planning to try making a card game (in Java) but I'm not sure what the best way to design it is. I understand the engine stuff but not how the cards should be coded an how they should interact ...
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1answer
194 views

I'm not sure why my shape is not moving

So I am trying to teach my self how to my develop games with java by cloning older games. At the moment I am cloning Pong, and I can not figure out why my paddle is not moving. The move method should ...
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1answer
51 views

Which .jar has JBox2d's p5 package?

Using Eclipse, I'm trying to write a simple hello world program in processing that simply draws a rectangle on the screen then has gravity drop it as seen in this tutorial. The problem is that when ...
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1answer
109 views

Java: See if Mouse is hovering/clicking Sprite

The game I am developing is in which you defend the Cell from the Viruses, and I need the sprites to have a MouseListener for when the mouse clicks on that sprite, it will get destroyed, and I cannot ...
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266 views

Implementing Explosions

I want to add explosions to my 2D game, but im having a hard time with the architecture. Several game elements might be responsible for explosions, like, lets say, explosive barrels and bullets (and ...
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1answer
190 views

Approaches to 2D Parallax

In a 2D scrolling platformer, what is the most efficient way or knowing which things with parallax depth should be drawn? The approach below describes trying to know which things are nearby so they ...
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2answers
164 views

Updating the jump in game

I am making a Java game and I want my game to run the same on any FPS so I'm using time delta between each update. This is the update method of the Player: public void update(long timeDelta) { ...
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1answer
498 views

Moving bounding box in 3D using Libgdx

How do i go about moving a bounding box in libgdx? I want to make the bounding box capture my character and move with him. So ideally i want to be able to copy my vector 3 from my model instance and ...
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2answers
153 views

Handling creation of enemy sprites in a level

I am trying to build an RPG tile-map based game. Currently I am going to set enemy sprites that will be repeating their motion in fixed path. Suppose that I have a level map, which has got width 3 ...
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1answer
119 views

How do I use ContactListener in JBOX2D?

I have a character, and I need to know when he's touching a wall/floor. I look for some information but no luck. How do I do that? I saw a few things about ContactListeners and getContactList(). But I ...
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1answer
165 views

LWJGL Wait for key press in a single method

Currently I am implementing the possibility in my game to change the keyboard configuration. Therefor, I have a menu in which is a button for each action the player can do. If the player clicks on one ...
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1answer
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LibGDX Drawing sprites when moving orthographic camera

I've been having this problem for a long time and I just can't seem to find the exact problem. I have a game where the map is 480x1600 and my camera has a view of 480x800. I have a button that when ...
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How do I use warble to package libgdx and ruby?

My ruby code is as follows include Java Dir[File.expand_path "#{File.dirname(__FILE__)}/../libs/\*.jar"].each { |x| require x; puts "go"} module LibGDX include_package "com.badlogic.gdx" ...