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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21 views

On-screen counting within a certain time-frame

In my game the player can collect a 'virtual currency' - on the main menu I display the amount the player has collected. However, instead of simply displaying it, I want to count up from 0 to the ...
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1answer
33 views

Aligning Camera to Rectangle

I'm working on a game in Java, and I'm having some trouble with finding the correct camera position. I've already made a Rectangle that shows exactly where I want the camera to be, and at what scale: ...
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0answers
20 views

How to display armor/equipment on a character? [duplicate]

I've been working on an Online 2D RPG mostly for fun and for getting a basic understanding of Socket Communication, packets, and just basic game development. Like most RPGs there is some kind of ...
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1answer
79 views

Implimenting BADLAND like Body Movement in Box2d

I am trying to make a body (character in my game) move and behave in the same way as the character in the BADLAND Game with regards to rotation. The character does not have fixed rotation and behaves ...
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0answers
46 views

Java LWJGL Rotating pistol with camera axis

I was writing a simply height-map based game and I wanted to add some range weapons like pistol. But I am stuck on the rotating part. My rotating on x axis was good. But problem starts when I want to ...
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1answer
32 views

Use Slick2D for standard application instead of game

I was wondering how well Slick2D would work when used for a custom rendered GUI in a standard application? A standard application not being a game. More like a text editor or 2D level editor that ...
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0answers
34 views

How to make a game save in Java? [duplicate]

I'm using JFrame to make games. How do you output the variables in the program to a external file and retrieve it when the player loads the game. I could not find a tutorial on it. If you can lend me ...
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3answers
89 views

Drawing sprites only under certain conditions - alternatives to using 'if statements'?

Within my game (which is Java/Android), I wish to draw a sprite only under certain conditions, so up until now, I've been using if statements to accomplish this. Something like so: if ...
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0answers
30 views

how to detect collision with libgdx and tiledmap [duplicate]

As you see , it's a picture from my game map , i have to create a 2d rpg game when a character can do many things. Currently i'm looking for a solution to handle collision between the character and ...
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0answers
53 views

2D GLSL Lighting and Sprites

I'm trying to make a 2D game engine, and I really want to support ambient light as well as multiple point lights that you can define the color, intensity, radius, etc from uniforms in glsl shaders. ...
-1
votes
1answer
83 views

How can I get “Good enough” collision for entities? [closed]

I am developing a Pirate ship fighting game. It's a great concept: Ships firing cannonballs, sinking each other, having to work as a team to complete the mission... But.. I've tested it with about ...
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1answer
60 views

Trying to add a feature to my (basic) level parsing algorithm - not sure how to (JAVA)

Right now this method goes through a list of GameObjects (e.g. JetPack, Platform) with their respective x and y positions in a text file called level1.txt: platform 840 280 platform 1130 280 coin ...
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0answers
36 views

Fake Lighting 2D Space Java

I have an image that I want to be used as the light. The white are should be drawn, the black should not. I need the light to be tinted to whatever color I pass to the light object. I have code ...
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0answers
23 views

VBO - Update Vertex data

My game will be a 2D Sidescroller and I'm working on moving objects around. Since I want to animate and move my sprites around, how do I update the vertex data? This is my current class for GUI ...
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0answers
38 views

manipulate textures in real time using GPU

I'm looking for some way (tutorial, library or build in option) to draw texture on JMonkey in real time. So I have 2 images one a normal texture that is fairly big(4000x4000) and another much smaller ...
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1answer
30 views

Jmonkey loading texture from fails

I have the following basic code: public void simpleInitApp() { Box b = new Box(1, 1, 1); Geometry geom = new Geometry("Box", b); Texture cube1Tex = assetManager.loadTexture( ...
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votes
1answer
47 views

Java Game not rendering properly

Hello I have a game that you can play(duh). When you start the game a loading screen pops up and on the loading screen I display an image of an eye I drew. In paint.net they eye looks perfect but in ...
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votes
1answer
39 views

Java game loop delta not working

Hello I have game loop where I can change framerate. But when I change framerate to other, delta time not working fine. For example when framerate is lower everything is faster. Here is game loop: ...
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0answers
13 views

Java JBullet rotating rendered rigidbodies

Hello I wan't to rotate object I wrote some piece of code but that don't won't to work. Here is this code: glPushMatrix(); float[] matrix = new float[16]; ...
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0answers
22 views

mouseWorld Coordinates Box2D

I have one simple question in Box2D: if you want to get the world coordinates of mouse, this is the function you gonna use in Java: void update(int x, int y) { if(mousejoint !=0) ...
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0answers
16 views

Java JBullet models not colliding [duplicate]

Hello I wan't to do model collsion in JBullet but that don't won't to work. Models look like have some invisble holes. Here the code for creating collsion shape: int triangles_count = (int) ...
0
votes
1answer
70 views

Libgdx box2d crashing

im making a game in libgdx which i having a bunch of circle bodies floating around in space and when the player's body crashes into another body, that body deletes and creates two smaller bodies ...
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0answers
53 views

Java Collision detection

Hello have a game where you look for key cards. Which allow you to open certain doors. for example if u have a red key card you can open a red door. The problem is that when I don't have red key ...
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1answer
77 views

Java JBullet Mesh collsion problem

I have a problem with JBullet mesh collsion. Everything works fine when I create a mesh from my object without scaling, but the problem starts when I want to scale the object. I also tried scaling in ...
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votes
2answers
72 views

Why does this simple if-statement that checks my main characters state never get called (Java/LibGDX)?

Been working on this for a while - basically I want my player to perform a front flip when he jumps (screen tap -> player jumps). I wrote the animation class Animator (extends Player implements ...
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1answer
84 views

Java, Crashing with a Shader on Intel HD Graphics

I just got a new computer (Acer Aspire ES1-311) which has an integrated Intel HD Graphics card, and I noticed that this fisheye shader crashes my game (LibGDX game, VM Crash): varying vec2 ...
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votes
1answer
91 views

minecraft source code for use in mods

So I am teaching a class where we will be using java to make minecraft mods. To keep things simple, we are using a third party program to set up the under-the-hood stuff for us (that way we don't have ...
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2answers
45 views

Simple LibGDX Pong game drag player instead of getting x position

I got a working pong game in LibGDX but when I touch the screen the player x automaticly jumps to the coordinates I touched. I wan't my game to detect I touched and then move the player to the ...
0
votes
1answer
67 views

Java LWJGL - How can I add water to my 3d world? [closed]

The title says it all, how can I implement a simplistic water system into my game? I am using Java LWJGL and OpenGL glsl shaders. I am still fairly new to game programming, and a complete noob in the ...
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0answers
27 views

onSignInSucceeded and onSignInFailed not called (Google Play Games Services)

Using the code below, can anyone tell me why my onSignInSucceeded and onSignInFailed callbacks are not triggered when signing in? It works fine if I extend BaseGameActivity, but when trying to extend ...
0
votes
1answer
83 views

Java LWJGL - Monster follow script not working properly

I have written a script to be set off whenever a player is within a distance of the monster. The script checks if the x position is greater than or less than the players x, and same for the z. (y is ...
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votes
2answers
90 views

Multiplayer game principles

I am developing game using libGDX libraries . I want to create multiplayer mode , where several players can play at the same time in the same room , each player can create his own room and other ...
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2answers
92 views

How does rendering with Swing compare to rendering with openGL?

[summary: Is the performance of Swing at least in the same dimension as openGL [through LWJGL]? If yes, what percentage would you give it? What possible other problems can I expect from Swing in the ...
1
vote
1answer
56 views

Why does this impulse not affect the body?

I'm just getting started with Box2d and I'm trying to apply an impulse to a circle but nothing really happens. First I define ball: BodyDef bodyDef = new BodyDef(); bodyDef.type = ...
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0answers
13 views

How to experiment for the value of gravity in Libgdx? [duplicate]

I am following a guide on how to play a flappy bird clone in the LibGdx framework. -http://www.kilobolt.com/day-5-the-flight-of-the-dead---adding-the-bird.html I am currently on the part where the ...
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votes
1answer
69 views

Java game runs slower and slower as game runs longer [closed]

I know that this question may be considered off topic, but this is a significant problem. Problem: I have in a java game that I am working on. The FPS counter starts at 250 FPS and in about 2-4 ...
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0answers
22 views

Google Play Games: onSignInFailed() and onDestroy()

I just had an error while testing my game, this is an update that I'm working on and it's never done this before (and I've launched this game on various devices literally hundreds of times, so it ...
0
votes
1answer
71 views

Creating a separate renderer for entities in a 2D game

I'm making a 2D shooter game. As of now, every entity "draws itself", meaning every renderable entity has a draw function. I know it is better if rendering is handled separately, but how can I achieve ...
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0answers
20 views

Android View (Splashscreen) Vanishes after phone woken up from sleep

My game uses OpenGL ES 2.0 and I have a splashscreen which uses a standard Android View. This plashscreen is shown on top of the GLSurfaceView and then simply removed once everything has been loaded ...
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vote
2answers
135 views

How do I limit the rotation speed of a mouse-following object?

I am trying to make a 2D top-down game where player controls a spaceship. The spaceship (a rocket) is just a sprite following the mouse cursor with a fixed speed and is always pointing toward the ...
0
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0answers
109 views

Create a Minimap of a Tiled Map with LIBGDX

thanks for stopping by to help! Having a little trouble with OrthogonalTiledMapRenderer. I've got a Tiled map that is 250x250 tiles, each 16x16 pixels. Trying to use a separate camera to draw a ...
0
votes
1answer
87 views

Multiplying by delta not giving smooth movement

I started working on my first proper game but reached a problem straight away. In short I have a game that runs most of the time at 60 fps. ( I am using Libgdx a popular Java framework) but my game ...
0
votes
1answer
66 views

Java LWJGL - How can I click to interact with objects?

I want to be able to click on a monster to walk to him and start attacking him. The part that doesnt make sense to me is the conversion between the mouse position, and the actual terrain position. ...
1
vote
1answer
186 views

AI movement in 2D

I've got a prototype of a game I've been mocking up and found myself struggling to find a solution for AI movement in a 2D tile based game. Here's the issue: The player is free to roam throughout the ...
0
votes
0answers
34 views

Android: ACTION_POINTER_DOWN Called Multiple Times

I hope someone can help me here My code is below and I can't figure out why the ACTION_POINTER_DOWN case is being called multiple times (sometime twice, sometimes 4 times, but always multiple times). ...
0
votes
1answer
75 views

OpenGL 4.4 LWJGL - How can i render text to the screen

I have been told that you need to create a texture atlas for the font, and individually assign each character to a texture and add them up to create the string you want to produce. This seems a little ...
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0answers
102 views

Implementing a game loop with interpolation

I am trying to implement the Game Loop interpolated found in this website http://www.gameprogblog.com/generic-game-loop/. Here is my implementation: long frameRate = 50000000; int maxUpdates = 3; ...
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0answers
42 views

Java Slick2D Image Glow Effect

How can one achieve a dynamic glow effect in Java Slick2d? I want an image to be surrounded by a glow when I move my mouse over it for example. Example: No glow Glow Is it possible to make this ...
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votes
2answers
64 views

Can't work with universal tween engine while having added it to gradle

I'm actually developing a game with libgdx and I'd like to create a splash screen. To do this, I must use the Universal Tween Engine. To add the Universal Tween Engine, I followed the instructions of ...
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votes
2answers
45 views

Adjust bitmaps according to screen ratios on android

I always thought that pixels were square... it turns out i'm wrong, and I am quite worried by this. This means that if I draw a circle, it will be round on my screen but it could be an ellipse on ...