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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2answers
287 views

Swing GUI for games (performance) [closed]

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 ...
2
votes
1answer
118 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, ...
2
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1answer
72 views

Java: Problems with Tile Collisions

I have created a tiled map using a BufferedImage (img) from a PNG. From that, I would like to detect the player's (peter) collisions with individual tiles on the map. However, my code will not run and ...
2
votes
1answer
100 views

Java Libgdx: How do you add cells to a TiledMap?

I'm trying to make a Side-Scrolling game that will allow you to place/remove tiles. I'm using the TileMap Editor to render the custom Tilemap but is there any way to add tiles? I have it where I can ...
2
votes
1answer
243 views

How do I reverse “Cartesian->Isometric” function?

I'm working on an isometric tile rendering engine and I need to reverse a function I used to translate the Cartesian coordinates into isometric coordinates. I've already written a function for this, ...
2
votes
1answer
148 views

Collision detection between axis-aligned bounding box and bitmap (pixel perfect) terrain

Working on a Worms-type game, I have my objects in bounding boxes and they sit on the pixel terrain. Currently I am able to successfully do the collision detection for objects when they enter the ...
2
votes
1answer
514 views

What version of OpenGL should I target for Steam?

I'm planning on developing a game (targeting towards PC and Linux) and putting it up on Steam in the future but I am not sure of what version of OpenGL to target so that the majority of steam users ...
2
votes
1answer
574 views

LibGDX scene2d good practices

I'm developing a game using LibGDX and in a part it has a pretty complex UI for profile selection and stuff. I have some general problems. I'd like to know good practices when generate good looking ...
2
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4answers
690 views

Android Game-Loop (rendering & logic removed, but still 'skipping frames')

Overview Guys really hoping for some help here. My game loop is based on code from Fix Your Timestep!. I've read the article more than a few times, but I can't quite work out what exactly is ...
2
votes
1answer
335 views

Drawing shapes and images in libgdx dialog

I am currently working on a dialog window for my android game using libgdx. This dialog window contains a collection of labels and buttons, but should also contain an image. The image represents the ...
2
votes
2answers
418 views

OpenGL generate hills looking vertices

I want to generate a terrain which looks like hills. Some sort of sine waves. Should be as simple as possible. But I can not figure out how. I get very scary results, which are nothing worth. I need ...
2
votes
1answer
238 views

Daily Unlock in LibGDX

I am trying to make a game that is a collection of mini games. The mini games will unlock daily. There are story for each day. And the story cannot be repeated so for example the player start playing ...
2
votes
1answer
456 views

Failing Screen Resize Method

So I want my game to draw to a specific "optimal" size and then be stretched to fit screens that are a different size. I'm using LibGDX and figured that I could just draw everything to a FrameBuffer ...
2
votes
1answer
225 views

libgdx arrays onTouch() method and delays for objects

I am trying to create random bullets but it is not working for some reason. also how can I make a delay so the bullets come every 30 seconds or 1 minute? Also the onTouch method does not work and it ...
2
votes
1answer
517 views

libgdx collision detection / bounding the object

i am trying to get collision detection so i am drawing a red rectangle to see if it is working, and when i do the code below in the update method. to check if it is going to work. the position is not ...
2
votes
1answer
245 views

Get the game state using Multithreading in Java Monkey Engine 3

I’ve been trying out Java Monkey’s multi threading recently via the wiki’s tutorial. Since I just wanted to test a prototype clinet, I made a program which creates some cubes using the ‘Cubes’ library ...
2
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1answer
912 views

How do I split a texture into differently shaped pieces with libgdx?

I want to split a texture into variously shaped pieces with libgdx, like the pieces of a puzzle game. TextureRegion.split() is not an option, as it splits into equally sized rectangular texture ...
2
votes
2answers
746 views

How can I create delays for sprite animations that work correctly when the application is killed and restored?

Please see my original question here: How should I use system time to compute delay times without stutters? In summary, I am attempting to to introduce a delay (say of 5 seconds or so) before a ...
2
votes
2answers
319 views

Expandable 2d environment by spawning and controlling individual tiles

what is the best way to implement an environment that is "expandable" in every direction so that when the player moves in any direction a new row or column of tiles that can be manipulated ...
2
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2answers
159 views

How do I create a horizontally centered “gravity line”?

Here's my ideal scenario: A game object (in blue) can change its horizontal velocity, but it will be pulled back by gravity (dotted gray arrows) toward a central vertical line (in red). How can I ...
2
votes
1answer
146 views

How can I extract the Geometry from a j3o file?

I created a blender file and then converted it into the j3o file. The only way to load the 3d structure in the game is through a Spacial object: Spatial towerModel = ...
2
votes
1answer
896 views

RTS Voxel Engine using LWJGL - Textures glitching

I'm currently working on an RTS game engine using voxels. I have implemented a basic chunk manager using an Octree of Octrees which contains my voxels (simple square blocks, as in Minecraft). I'm ...
2
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2answers
489 views

fast java2d translucency

I'm trying to draw a bunch of translucent circles on a Swing JComponent. This isn't exactly fast, and I was wondering if there is a way to speed it up. My custom JComponent has the following ...
2
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1answer
267 views

JBox2D Polygon Collisions Acting Strange

I have been playing around with JBox2D and Slick2D and made a little demo with a ground object, a box object, and two different polygons. The problem I am facing is that the collision-detection for ...
2
votes
2answers
290 views

Poor mobile performance when running from Eclipse

So after weeks of thinking my rendering code was bad, I accidentally discovered the following: Running my game on a Nexus S From Eclipse (Debug as -> Android application): 12fps From the device ...
2
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1answer
379 views

What concepts are used to procedurally generate video game content using music like in Audiosurf, Beat Hazard & Symphony?

I'm curious as to how video games like Audiosurf, Beat Hazard and Symphony procedurally generate content using music. What are the common concepts used to accomplish this? And in what way is the music ...
2
votes
1answer
919 views

LibGDX Scene2D event handling and bounding box relative to the center of a TextureRegion

I'm experimenting with Scene2D to see if it fits fot the game I want to develop. Say I have an Actor with the origin in the center of its TextureRegion. My setup method contains this code: float ...
2
votes
2answers
531 views

Split up a screen into regions

My task: I want to split up a screen into 3 regions for buffs-bar (with picked items), score-info and a game-map. It doesn't matter are regions intersect with each other or not. For example: I have ...
2
votes
1answer
690 views

Java network game - synchronize state

I'm creating a networked frame-based game (like Tetris battle), using the Java Sockets API, and right now my main concern is how to 'synchronize' the game state between two players. I've already ...
2
votes
1answer
2k views

How to scale openGL textures by a ratio based on height/width (or alternative)

I have been able to successfully allow my UI to extend over edges of my game on higher resolutions by using the Android Guide and by implementing this code on the GL10 object: ...
2
votes
1answer
209 views

Abstract Java game objects for Jython

I want to create an abstraction layer between my Jython Script objects and my Game Objects. I am not making the all of the engine in Jython. Most of my game logic is in Java. I just want to expose ...
2
votes
1answer
424 views

How do I make my camera follow a Box2D object?

I'm implementing a camera in my game. It worked for regular objects, but I began using Box2D and obviously things changed a bit. I have a Body object that I want to draw at the center of the screen. ...
2
votes
2answers
872 views

Why do my update and draw loops throw a concurrent access exception?

I've taken up the challenge of creating a basic 2D side-scrolling monster truck game for my little brother. It seems easy enough in theory, but jumping into Java out of XNA feels strange. My game ...
2
votes
1answer
613 views

Multiplayer in a game. How to design it object wise?

I was suggested on StackOverflow to ask this question here. I'm working on a simple game and I was thinking of adding multiplayer feature but I'm a bit stuck. I'm not sure what approach should I ...
2
votes
1answer
561 views

How to handle scripted events in a 2d java game?

I'm in the planning phases of a 2D java game. The game is a tile-based platformer with some action-y parts to it, like a Metroidvania formula game. The static portion of each stage is expressed as an ...
2
votes
1answer
1k views

libgdx collision/picking

I am trying to make something with java libgdx (2D). One thing that I can't figure it out is how to check mouse intersection with (fore example) isometric textures that are not rectangle shaped ...
2
votes
1answer
274 views

How to implement a multi-platform Java 2D game engine's graphics?

I'm not sure whether this question should be posted here. I'm trying to make a basic generic game engine in Java. Here's what I have so far. public abstract class Device { public abstract void ...
2
votes
1answer
1k views

Jogl2 won't accept jogl 1.0 code - GL_LIGHTING and GL_LIGHT_MODEL_AMBIENT cannot be resolved or is not a field?

I'm trying to run my code on jogl 2.0 , for the first time (until now I worked with jogl 1.0) however Eclipse throws to almost every that I have a "cannot be resolved or is not a field" message . ...
2
votes
1answer
539 views

MVC with looping view

For our school project we'd like to develop a game using the MVC pattern. We're all moderate new java programmers and absolutely new in game development. With our current view (containing only menu) ...
2
votes
1answer
216 views

Camera not strafing (GLSL)

I use this code in my GLSL vertex shader, where v_position is the vertex position: gl_Position = v_position * u_camera; and set u_camera as follows: meshShader.setUniformMatrix("u_camera", ...
2
votes
1answer
461 views

Android Virtual Pet Gameloop

Hello I'm looking for a bit of advice in which way is the best to proceed creating my applications 'gameloop' - It doesn't want to be a game loop in the truest sense since I'm not really rendering any ...
2
votes
1answer
673 views

Is jButton in Java suitable for a Game GUI?

Recently I have encountered the issue of trying to add a GUI into my game using Swing. The game will randomly & infrequently flash the jButton or Swing component when I add it to my jFrame. I'm ...
2
votes
1answer
518 views

Adjusting the rate of movement of different objects on the same timer

I have a series of objects moving along the straight lines. I want to implement slight changes of velocity of each of the object. Constraint is existing model of animation. I am new to this, and not ...
2
votes
1answer
135 views

How to manage my model

I have in my model, a list of Classes : Player, NonPlayerCharacter, Monster, Item, NonMovableItem etc With AndEngine I've a list of sprite for each piece of my model, How can I manage the ...
2
votes
3answers
202 views

Positioning entities in adjacent maps

Say I have a 2D tile based game engine (I don't, but I will soon). I was wondering how I would manage drawing adjacent maps. That is, imagine we have a map that is 50 by 50 tiles wide. Then next to ...
2
votes
3answers
857 views

Compressing 2D level data

So, I'm developing a 2D, tile based game and a map maker thingy - all in Java. The problem is that recently I've been having some memory issues when about 4 maps are loaded. Each one of these maps ...
2
votes
1answer
2k views

Best practice to use Sprites in a game using AndEngine GLES2

Currently I am having static reference to all my sprites and loading and initializing them in my OnCreateResource mthod of SimpleBaseGameActivity, But now I have to override onAreaTouched listener on ...
2
votes
4answers
3k views

Question about JPanel “transition” for Java Swing

I want to make like a sort of main menu (in GUI). When the user clicks the start button, the screen transition into another "screen" (JPanel). This image will make it easier to understand. ...
2
votes
2answers
789 views

Help Decide between C#/XNA client or Java

The game runs on a client/server architecture currently setup for TCP, and the client code was built in AS3 to be web based. What we're running into is 3 problems for the client. AS3 has no ...
2
votes
2answers
603 views

Snake game - collision detection causing new position of apple to be rendered multiple times

I have a collision method implemented through the use of slick2d. When ever the snake collides with the apple, it causes the apple to be rendered in multiple places before the snake moves further ...