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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4
votes
1answer
216 views

Clicking on clues and other objects in a 2D cluedo like game

I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game ...
2
votes
1answer
5k views

How do I implement a score database in Android?

I making a 2D game for Android using OpenGL-ES technology. It is a space shooting game where the player shoots enemy ships. I want to keep a track of score for the amount of enemy ships destroyed ...
8
votes
1answer
6k views

Box2D Difference Between WorldCenter and Position

So this problem has been brothering for a couple of days now. First off, what is the difference between say Body.getWorldCenter() and Body.getPosition(). I heard that WorldCenter might have to do ...
7
votes
2answers
617 views

Handling commands or events that wait for an action to be completed afterwards

Say you have two events: Action1 and Action2. When you receive Action1, you want to store some arbitrary data to be used the next time Action2 rolls around. Optimally, Action1 is normally a command ...
2
votes
2answers
799 views

Horizontal wrapping with AndEngine

How would one implement the effect of a sprite disappearing on one side of the screen and appearing on the other using AndEngine? Like in Kid Icarus, seen here at around 1:22.
-5
votes
1answer
987 views

How to properly scroll a 2D tilemap?

Hello and I'm trying to make my own game engine in Java. I have completed all the necessary ones but I can't figure it out with the TileGame class. It just can't scroll. Also there are no exceptions. ...
0
votes
4answers
1k views

Bukkit send a custom placed name plate?

Hello i have been working on a part of my plugin that has waypoints allowing the user to create delete etc. I got to thinking after using and seeing a couple of the disguse plugins. That maybe i could ...
-3
votes
1answer
435 views

Bukkit inventory saving: crashing somewhere

I'm working on a command for a bukkit plugin that lets you transfer worlds. In the section about saving the player's inventory, I'm getting a runtime error. My question is: Why is the error happening, ...
2
votes
1answer
2k views

Why wont the LibGDX's main class Initialize on Android Launcher?

So I was searching for different ways that could suit me in programming and came across LibGDX. Naturally I looked at the tutorial. As I was doing it, I was following the steps word for word, except ...
1
vote
1answer
3k views

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 ...
2
votes
1answer
1k views

How can I resize a set of sprite images?

Hey StackExchange GameDev community, I'm attempting to resize series of sprites upon instantiation of the class they're located in. I've attempted to use the following code to resize the images, ...
-1
votes
2answers
724 views

LWJGL in Visual Studio (possible)?

I switched from XNA and C# to LWJGL and Java about 14 months ago. Inherently, this called for a switch in IDE. I started using eclipse because I have also done some basic Android development in the ...
6
votes
3answers
3k views

GameState management hierarchical FSM vs stack based FSM

I'm reading a bit on Finite State Machines to handle game states (or screens). I would like to build a rather decent FSM that can handle multiple screens. e.g. while the game is running I want to be ...
4
votes
1answer
4k views

Starting a Java activity in Unity3d Android

I wrote a small Java activity extension of UnityPlayerActivity similar to what is described in the Unity docs. It has a method for displaying a song picking interface using an ACTION_GET_CONTENT ...
-6
votes
4answers
4k views

How to implement a 2d collision detection for Android

I am making a 2d space shooter using opengl ES. Can someone please show me how to implement a collision detection between the enemy ship and player ship. The code for the two classes are below: ...
1
vote
1answer
126 views

How should game objects with fixed positions in the world be positioned?

I have some game objects that are always at the same position in my game world as they make up some of the scenery of my puzzle game. At the moment, their positions are sort of hard coded in and some ...
4
votes
1answer
2k views

Distributing cross-platform .jar containing natives for LWJGL?

I'm making a game in Java using Slick2d, which depends on LWJGL. I can get everything to work in my development environment, but when I export it to a .jar, it needs the natives placed in the same ...
1
vote
2answers
195 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 ...
50
votes
8answers
49k views

Is Java viable for serious game development? [closed]

Ever since I was a little kid, my dream has been to develop games. Well, now that I am older, more mature, and have some programming experience, I would like to start. However, I would like to turn ...
2
votes
1answer
4k 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 ...
2
votes
1answer
1k views

Bukkit saving inventory enchantments

I am working on a bukkit plugin. One thing I want this plugin to do is teleport you to other worlds on the server. However, I don't want the player's inventory to be saved. Right now, I have this ...
2
votes
1answer
271 views

improving speed of 2d ball collision

I am making a game which has many balls bouncing around the screen (around 200-300 balls in a small area). One thing I am trying to do is improve the performance of the collision detection and ...
2
votes
3answers
1k views

basic Theory that we need to know before start learning game programming [closed]

Came from Java (and fairly C++) and I am very confident in my programming skill Now I'm about to move to something more interesting, game programming The thing is as I am new to this, I need to know ...
5
votes
1answer
4k views

libGDX Multitouch Controls

Has anyone had any trouble implementing multitouch on-screen controls in libGDX, such as multiple joysticks? I've tried and I can't seem to get libGDX to play nice with multitouch/multiple pointers on ...
1
vote
1answer
835 views

Using Slick2D/LWJGL to brighten an Image

Using the Slick2D Library for Java, I want to know if there is a way to brighten an instance of org.newdawn.slick.Image. I'm willing to use other image-manipulation libraries if need be.
2
votes
2answers
2k views

How do I set a single pixel of an image in Slick2D?

I would like to set an individual pixel in Slick (i.e Image.setPixel(x, y, r, b, g)) but I can't figure out how. There is an Image.setPixel function but it doesn't take x and y coordinates. Any ...
6
votes
1answer
1k views

Minecraft Mod portable torch/lantern

I have just started making a mod for minecraft, I learned how to make items and import custom png's and have gotten all of that to work. I have been searching around the code trying to find a way to ...
2
votes
1answer
671 views

How should I connect objects when using the MVC paradigm?

This has been confusing me for the past week as I am trying to make my first actual game. It's only my 2nd year learning Java so I am really trying to learn how to program like a professional ...
2
votes
7answers
3k views

Implementing pausing functionality

I'm working in LWJGL and trying to implement pausing when the user presses the 'P' key. Thus far I have this: boolean gamePaused = false; while(!Display.isCloseRequested()){ ...
5
votes
1answer
6k views

Using the AssetManager in LibGDX

I am trying to use the AssetManager class in LibGDX and I understand how it works but I am trying to implement a loading screen. I have followed the AssetManagerTest.java file here, but I am having a ...
2
votes
2answers
4k views

Java game engine for android and desktop [closed]

I want implement 2d game as desktop application. And after development move it to android platform. Engine should be have input and network managers. Help me choose.
1
vote
1answer
1k views

MMO Proxy Server

I am building an MMO and someone told me I should never have my application interfacing directly with the net, and that I should have a local proxy. This makes sense, with security issues and scaling ...
2
votes
1answer
6k 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.
-1
votes
1answer
4k views

How to get started in Java Game Programming? [closed]

As I try to program a game, I can't do virtually anything(because I really don't know what do do although I know the basics in Java), except if I look at tutorials. I'd like to ask you, professional ...
4
votes
1answer
2k views

In a component/entity system, what's the correct way to implement entity-specific components?

I'm trying to create a basic C/E game engine for Android, and I'm trying to re-create pong as a basic warm-up. I currently have a EntityManager class that contains a list of all the UUIDs for its ...
1
vote
1answer
3k views

Moving an image by rotating and increasing y axis causes a trailing issue

Forgive me if me anything is unclear, this is a tricky thing for me to explain. In an applet I draw a little ship gif. I have it so I can rotate the object and then increase or decrease the y axis to ...
9
votes
5answers
747 views

Increasing the probability for similar tiles to generate next to each other

I'm working on a tile map system, which insofar looks like this (green is grass, air is white, stone is grey, and blue is water): It uses a simple random number generator so that there's a 45% ...
7
votes
2answers
2k views

SQLite in libGDX

Does anyone have an example of how I can use SQLite in libGDX? I have a class in my original Android code that allowed me to easily access a database but I can't seem to find anything equivalent to ...
1
vote
1answer
242 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?
5
votes
2answers
2k views

How do MMO servers communicate with players who are behind a NAT?

I'm now planning to develop a real-time mmo in the future using udp as the transmission protocol since it has lesser overheads than tcp... I understand that between the client and the server, they ...
-5
votes
1answer
127 views

Determining Available Recruits in Java Game

I am making a Recruit Army System on my Java Text Based Strategy RPG, so here are the integers by the way: public int Swordsman; //Price: 10 each public int Ronin; //Price: 10 each public int ...
2
votes
2answers
392 views

Random Calculations for Strategy Based Games in Java

I am making a console based strategy game like Genghis Khan: Legend of the White Wolf, although it is in console. How can I implement the Random Calculation in there? First off, the game goes like ...
1
vote
2answers
928 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 ...
0
votes
3answers
2k views

Strings and Variables Inheritance From Another Class in Java

I am working on a program and I want these variables and strings, to be called on another class. So I have these: public static boolean newgame = false; /* * Declares Character Status */ public ...
0
votes
1answer
4k views

SDL, SFML, OpenGL, or just move to Java [closed]

I recently started a new project, and I'm wondering if I should change the technology now before it's too late. I'm using SDL with C++, I have around 6 classes, and the game is going alright, but I ...
2
votes
1answer
1k views

2D bullet movement speed problem [duplicate]

Possible Duplicate: Moving from A(x,y) to B(x1,y1) with constant speed? My problem is that I can't get my bullet movement right. The current update code I have for it is: speedX = deltaX; ...
1
vote
1answer
819 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 ...
1
vote
1answer
4k views

Rotation of images in Slick2D

I have have a rotation problem in the Slick2d library, the image is just not rotating (ie I set a rotation but no result is shown). Here is the rotation code: if (input.IsKeyDown(Input.KEY_LEFT)) { ...
-1
votes
1answer
783 views

A* Pathfinding Problems

I'm trying to implement the a* pathfinding algorithm in my game. I've looked at dozens of tutorials but I can't seem to get it right. My code is below, and It's not working... does anybody see ...
2
votes
1answer
961 views

Slick2D Tile Based 'Fog of War' Blurring Problem

I'm working on my first Java Game and I have run into a little problem I'm hoping to get some help with. I'm using Slick2D displaying a tile based map, and I'd like to know how I can created a ...