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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One Dimensional Perlin noise vs Multi-Dimensional

I am reading through a book called "The Nature of Coding" and I am working on porting the examples from Processing.js to Regular old Java. The example I am on uses the following method call in ...
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Is it possible to use Java as a scripting language?

Is it possible to use Java as a scripting language for a C++ engine/game? I understand that you need to make a binding to the interpreter, but I haven't seen any around.
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Serialization of objects problem

i have a problem with serialization (saving and loading game variabiles), when i save evreything seems to be saving correctly but when i try to load it only detects first 3 objects i saved and the ...
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Is there a cross-platform special directory I can use for game save files?

I'm developing with LWJGL and Java on a Windows 7 laptop. I've successfully set up saving to the %appdata%\gamename\saves\ or long form c:\users\user\appdata\roaming\gamename\saves\ folder by using ...
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Drawbacks of using reflection for a component based system at loading-time

I'm coding a little casual game in Java using Slick2D. This game use a lot of different "objects", managed in a composite way. So, firearms, furniture in the map, NPC and player character will be ...
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Sprite batching in OpenGL

I've got a JAVA based game with an OpenGL rendering front that is drawing a large amount of sprites every frame (during testing it peaked at 700). Now this game is completely unoptimized. There is no ...
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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 ...
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Programming Languages Recommendations: A Space shooter game that allows two people to play [closed]

Do you remember an arcade game, that allowed two people to versus or play each other? It was a Galaga/Gradius type game. Me and a couple of other people I know want to make a game like this. We want ...
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Should each Entity have its own update and render methods?

First, the questions: Should each Entity (which are classes like Character, Tree, Enemy) have its own update() and render() methods? If that's the case, then should I use Interfaces like ...
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Better way to generate enemies of different sub-classes

So lets pretend I have an enemy class that has some generic implementation and inheriting from it I have all the specific enemies of my game. There are points in my code that I need to check whether ...
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How can I change this isometric engine to make it so that you could distinguish between blocks that are on different planes?

I have been working on an isometric minecraft-esque game engine for a strategy game I plan on making. As you can see, it really needs some sort of shading. It is difficult to distinguish between ...
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How does this formula for generating water waves work?

I have been trying to implement the wave equation described in this paper ("Water Simulating in Computer Graphics," Kai Li and Liming Wu) in Java. Part of the paper discusses modeling waves as a sum ...
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3D models on 2D tilemap perspective when scrolling

I am creating a small top-down game, where the player traverses a 2D tilemap, with an illusion of depth provided by 3D models for things like buildings or trees. Having gotten to the point where I ...
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Is it legal to pack LibGdx libraries in my jar file? And to obfuscate them?

I'm using LibGDX and deploying a runnable jar file, using the Eclipse feature, with libraries extracted into it. There are also .so files and .dlls inside. Is it legal to do so? I didn't find ...
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355 views

What version of Java should I target for applets?

I recently deployed an applet that seems to require Java 6 Update 24. I assume the reason for this requirement is the matching JDK version I used to create the applet (I am new to Java). The fact ...
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827 views

How do particle systems work?

I want to implement a particle system in my game, but I've never programmed a particle system and don't know where to start. I only want to display pixels (GL_POINTs) with different sizes in ...
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How to get smooth transition within slick?

When a player clicks start, my app immediately switches to the first level. My question is how do I incorporate a smooth transition within Slick?
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Checking validation of entries in a Sudoku game written in Java

I'm building a simple Sudoku game in Java which is based on a matrix (an array[9][9]) and I need to validate my board state according to these rules: all rows have 1-9 digits all columns have 1-9 ...
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Moving from XNA to Android

I've been using XNA to learn game programming for some time, and I'm interested in moving to Android. Having said that; the learning curve to get started seems to have ramped up exponentially. I ...
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Circle-Rectangle collision in a tile map game

I am making a 2D tile map based putt-putt game. I have collision detection working between the ball and the walls of the map, although when the ball collides at the meeting point between 2 tiles I ...
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How to Align Gun with Bullets

I have a top-down 2D shooter. I have an image of a player holding a gun, that rotates to face the mouse. Please note that the gun isn't a separate image tethered to the player, but rather part of the ...
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How to get more than one window in Java LWJGL

I'm trying to write a game in Java LWJGL. And I need more than one (multiple) display window. By default I've got one display window where I can draw everything. But I'd like to split some data to ...
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2D Platformer Collisions

I've basically asked this question before, and I know it's been asked probably a billion times, but I still can't seem to do it. All I want to know is how I should go about doing basic 4-way, ...
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Java game design question (graphical objects)

I'm beginner in game development, in Java and here on this site too and I have a game design question. Please comment my idea: I have a main loop which call update and draw method. I want to use an ...
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257 views

Neural Network ai evolution?

I've created a small simulation game and I have a basic neural network in place, each "creature" in my game has random weights on it's nodes and they all behave differently. Their goal is to stay ...
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How do I draw a full resolution texture to a window of the same resolution?

My image is 1280x800, and my screen size is 1280x800. It should draw perfectly. I'm creating a quad the size of the screen, and setting the texture to fit the quad. But right now it draws a square ...
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How To Correctly Extend the Sprite Class in LibGDX

I am currently pursuing game development as a hobby, and have run into what seems to be a conflict in my mind regarding how to properly (using best practices) extend the Sprite class in LibGDX (or for ...
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How to add a scrolling camera to a 2D Java game?

I am attempting to create a game where the camera follows the player, always making sure the player is in the center of the screen. How would I go about this? This game is a 2D Java game, made with no ...
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Predicting Enemy Movement

Well I have a simple 2D game where all positions are defined by and X and Y coordinate. There are objects moving at a constant velocity. And a turret fires a bullet at the X and Y coordinates of the ...
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141 views

RPG Factions - Friendly/Hostile check

I'm having some trouble checking if one faction is hostile to another faction in my RPG. I'm using enums for my factions and relations but I feel like there's a better way to approach this. Currently ...
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1answer
345 views

Implementing Vehicles in your game

In the game i am creating as an hobby (learning is the primal goal of it all) i plan to implement a space ship that the player can enter and use to explore it. I tried to search the internet for the ...
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725 views

Storing data for a pokemon like game

The game I'm developing is close to Pokemon. How should I store the data? I am currently thinking of text files where I save the map and have a corresponding textfile for the trainers and their teams ...
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How to detect a touch on transparent area of an image in a (libgdx) stage?

Can some one please help to detect a touch on an image which I am using as an actor in a stage. The image is actually a long diagnol brush which has plenty of transparent area. The problem is when I ...
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Move penetrating OBB out of another OBB to resolve collision

I'm working on collision resolution for my game. I just need a good way to get an object out of another object if it gets stuck. In this case a car. Here is a typical scenario. The red car is in ...
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Should I amortize scripting cost via bytecode analysis or multithreading?

I'm working on a game sort of thing where users can write arbitrary code for individual agents, and I'm trying to decide the best way to divide up computation time. The simplest option would be to ...
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Are display lists faster than VBOs?

I'm making a voxel rendering engine. My "chunks" are 32 * 32 * 256 blocks and I can render a 16 * 16 square of them (which corresponds to Minecraft's maximal render distance). I'm using VBOs holding ...
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How would I implement procedurally generated tiles in libgdx?

I'm creating a simple top down Zelda-esque game in libgdx, and I want to implement tile-based dungeons that are procedurally generated, similar to this. Libgdx does have a class called TiledMap which ...
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Inventory Grid Detection

I'm working on creating an inventory system for a game. The inventory system will use cells and 2D images to represent items, like Minecraft, Diablo, or WoW. I've hit a bit of a snag when trying to ...
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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 ...
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How do I avoid floating point indeterminism when implementing lockstep?

I am working on a multiplayer RTS game in Java. It uses lockstep for networking, which requires that both computers can deterministically. These are the 2 closest/more viable approaches I could come ...
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Smooth movement in a tile based game

How can we make our character move smoothly across tiles? He moves tile by tile, but that looks unprofessional. In addition, when you hold down the arrow keys he zips across the screen. How can we ...
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Structuring server-side networking with entity-component systems

I've been working on an online game, and recently have been working on converting the base of the game to use the Artemis Entity System Framework. I'm having a bit of difficulty conceptualizing ...
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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 ...
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661 views

Help for choosing a cost effective game server for Flash client [closed]

I am developing a flash-based game primarily for desktops, to be hosted on facebook platform (like cityville, sims social etc). The gameplay doesn't involve real-time communication between players ...
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1answer
962 views

Java rendering performance bottlenecks

I've read a lot of forums about making 3D games in Java but I was unable to build a full picture of how it performs in video games. I know that it works smoothly for small and average size games, but ...
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What's the best way of drawing a glowing 3d line using LWJGL?

Sort of like a strip-light effect; not actually a light source, but just a polygon with glowing edges. Can this be done easily? Right now I'm contemplating drawing a line more than once with varying ...
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Horizontal lines between vertices do not render

Good day, I am using LibGDX to try to render a mesh for a hexagon board. I can render the triangles, which is great, but I am having an issue rendering all of the line segments for the mesh and I ...
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How do I send multiple matrices to a vertex shader?

I'm practising animations using bones/skinning. I am trying to send the shader one matrix per vertex. I can think of these two approaches. Method 1 I have one uniform handle for each bone matrix ...
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RPG game engine. Skill application calculations

Short preface I am a part of a small team which is entering game development. We're creating a new RPG setting with custom game system and mechanics based on dice rolls. I'm server-side java ...
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Isometric - precise screen coordinates to isometric

I'm trying to translate mouse coords to precise isometric coords (I can already find the tile the mouse is over, but I want it to be more precise). I've tried several different methods but I seem to ...