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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Dijkstra Pathfinding in Libgdx, some minor problems

I'm having some problems with my Dijkstra implementation in Libgdx. I understand that there are already AI libraries that can probably do this much simplier but this is a school assignment so i'm ...
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1answer
69 views

What is the difference between .obj files and Collada files? [closed]

I am currently making a game in java using LWJGL 2.9 and I am wondering what the difference between the .obj format and .dae format is. Currently I can load .obj files and would like to load .dae ...
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0answers
14 views

get the closest points [duplicate]

Let's say I have a bunch of points: What is the best way to get a certain amount of closest neighbors. For example I wan't the 8 closest points for point no 57. This without using brute force. O ...
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1answer
78 views

JNI multidimensional array as return value

I have some C++ code that I wrote to generate voxel terrain and would like to access it in JAVA. you pass it three integers; the seed and the coordinates of the chunk that it is generating ...
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1answer
38 views

OrthographicCamera and viewport not giving expected effect

I recently asked a question about this area that I think was too broad, so I will try a new approach. I have the following code I am experimenting with: batch = new SpriteBatch(); ...
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0answers
14 views

Stack matrix affecting shooting mechanics

I attempted to make a scroller game using parallax scrolling in LWJGL. Everything is fine but I'm having trouble with the matrix stack and the bullets. So basically when I shoot the bullet it moves ...
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1answer
59 views

How can I split up a large model into an octree codewise?

For collision detection, I am attempting to split up a large model into an octree. If we take this black thing thing to be the ship (104,000 vertices): Then I would like to split up the faces I ...
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0answers
25 views

Can't perform normal jump after applying revolute joint

I have encountered the following problem: I have two PolygonShapes which I had connected with a RevoluteJoint. The first body is called square the second is called weapon, before connecting the two ...
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4answers
1k views

What Java class should I use to represent a Vector?

Does Java have a built-in Vector class suitable for handling collision detection / response? It should have methods like subtract(Vector v), normalize(), dotProduct(Vector v), ... It seems logical to ...
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0answers
37 views

How do I make a Slick2D TextArea display newlines?

Whenever I press the Enter-key my Slick2D TextArea does not go to the next line. How can I make it do that? Here is the code that involves the TextArea: private TextField ta; public void ...
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1answer
87 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. ...
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1answer
67 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
22 views

LWJGL: getDisplayModes() on Linux with two monitors

When calling getDisplayModes() on a Linux machine with two monitors I only get one single resolution, that is, the current resolution set on the main monitor. However, calling xrandr directly gives me ...
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0answers
31 views

How to use Android Sensor, only in x axis

I have seen some tutorials but they are very complicated and they are about the three axes (x,y,z). So I want a code that moves an object or more (for example) to the right or the left when the ...
0
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1answer
44 views

java Move vehicle towards the mouse

Hello I have a game like asteroids and I have my ship on the screen and he points towards the mouse. I want to know how to move towards the mouse so if I press w I will drive towards the mouse and if ...
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0answers
7 views

Find fastest rotation left or right to face an object [duplicate]

im working on a competition where i am creating an AI for a game that the host has published and made for this event, i have two commands for turning my car and that is left and right, spinning on the ...
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2answers
52 views

How to make a proper cache on user computer?

Currently when launching the client of the game, it connects to the server and loads all the cachedata in a normal form (= folders, .txt files and .png files). However I don't like that the players ...
2
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1answer
194 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 ...
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0answers
19 views

Libgdx. Sprite won't stop moving;

I can't stop a sprite from moving. Here's my code: boolean moving; Gdx.input.setInputProcessor(new Input(){ public boolean touchDown(int screenX, int screenY, int pointer, int ...
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0answers
67 views

Libgdx simple movement with velocity [closed]

Ok so this is driving me nuts. I've followed 3 tutorials now and I'm trying to get simple velocity to work and it just doesn't want to work for me. I have an open space and I want the character to be ...
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1answer
87 views

LibGDX Android Application only running once

I'm having trouble trying to figure out why my LibGDX game only runs successfully once on Android. Assuming the game has not been installed on the device, when I run the application from eclipse the ...
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0answers
54 views

Images not scaling properly in LibGDX when using “batch.setProjectionMatrix(camera.combined);”

I am trying to put Assets into my game but when i put in the line of code "batch.setProjectionMatrix(camera.combined);", which from my knowledge scales the Asset to the size of the window it appears ...
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1answer
45 views

LibGDX/Java - Trying to find the vector from one object to another

I want to add springs in my game that work like the ones in sonic - i.e. if you can't get over an obstacle you have to hit a spring which sends the main character flying towards another spring that ...
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1answer
86 views

How can I store tile maps as PNG images?

I want to let players of my top-down game save, load and share worlds as PNG images. How do I read the colors in a PNG file or change them? I imagine something like this: BufferedImage mapImg = ...
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2answers
61 views

Delay in bullets

I made my character shoot but the amount of bullets he shoots is way too much. I'm trying to add a delay between bullets. I've tried this: int shootTime = System.currentTimeMllis(); public void ...
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1answer
49 views

Sprite movement only works the first time, can't figure out why [closed]

In my libGDX game I have finally managed to get the sprite to move the way I want him to but for some reason my desired outcome only works the first time I run the code. If I try to run it again, he ...
1
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1answer
119 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 ...
4
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1answer
1k views

2D game - Missile shooting problem on Android

I have to make a tank that sits still but moves his turret and shoots missiles. As this is my first Android application ever and I haven't done any game development either, I've come across a few ...
2
votes
1answer
2k views

Using Nifty GUI with Slick2D

As seen here NiftyGUI has it's own GameState classes, I want to know if for adding UI to one state of my game I need to make that state NiftyOverlayGameState or still a BasicGameState but to add a ...
3
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2answers
679 views

Slick & NiftyGUI. Nifty initialize exception

I found my self into trouble when trying to run a Slick game with a Nifty Game State. This is the code: @Override protected void initGameAndGUI(GameContainer container, StateBasedGame game) ...
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2answers
202 views

Are shaders the only way to implement 2d lighting?

I'm working on a 2d top down game with libgdx and I think i got the basics. No want I want to implement lighting, I don't know anything about lighting. I want just to have some light sources and ...
0
votes
1answer
59 views

How does one write a wrapper for a game server? [closed]

From what I gathered, wrappers mimic the game server in question, receiving packets from client and sending them to the server (and vice versa). It acts like a bridge between the client and server, ...
0
votes
1answer
92 views

How to resolse collision between moving and static AABB?

What I have is a map represented as list of Rectangles and player's rectangle. Also I have function to determine depth of the collision: Point TestAABBAABB(Rectangle a, Rectangle b) { ...
3
votes
2answers
2k views

Bukkit shoot tnt & help with vectors

I want to shoot a piece of tnt from the players face and then let it explode when it hits the target block. if (cmd.getName().equalsIgnoreCase("cannon")) { ...
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0answers
36 views

Box2D replace Fixture not working as expected

I am using box2D to develop a simple game, and I am using the Physics body editor by Aurelien Ribon to load the fixtures into bodies. I have written the following method which should scale my ...
2
votes
4answers
173 views

How can I avoid sending the full game state so often?

I'm making a real-time 2D MMORPG in Java. Currently data all surrounding NPCs' and players' data is sent so frequently that the client crashes—it can't handle the data quickly enough. I'm sending data ...
3
votes
2answers
3k views

Problem to match font size to the screen resolution in libgdx

I'm having problems to show text on my game at same size on different screens, and I did a simple test. This test consists to show a text fitting at the screen, I want the text has the same size ...
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2answers
114 views

Breakout Collision Detection: Ball gets trapped inside block

I'm writing a breakout clone where blocks to hit can be of various sizes and the projectile can move at different speeds, and I seem to be having some trouble getting the collision detection perfectly ...
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2answers
81 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 ...
5
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2answers
1k views

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 ...
2
votes
1answer
44 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 ...
0
votes
0answers
75 views

save and view snapshot image from android device

I'm having a problem with saving image into an android device this is what i did My java class : package com.test.app; import com.unity3d.player.UnityPlayerActivity; import android.os.Bundle; ...
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0answers
32 views

Partitioning a Tiled map

In my 2d platformer with libGdx, my maps are quite large (eg. 200x200). The player character is only 2 tiles high. I use Box2d for collision, so in my tiled map I have layers for terrain, ...
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0answers
92 views

How to make a sword swing effect

I'm working on a 2d java game on Slick engine and I always wondered how to make swing effects when striking with a sword? How to code something like this? ...
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0answers
38 views

Simulate juggling : how throw and grab objects with JBOX2D

There is an object which simulates a ball and another which simulates a hand (square).I want to be able to catch the ball and throw it with a projection force with the hand on JBOX2D. Any sample code ...
-1
votes
1answer
67 views

How can I implement input handling into my game?

I'm making a libgdx game where the player dodges falling objects. To move the player I have it set so that on desktop he moves left and right when you press A and D respectively. I am trying to ...
0
votes
1answer
52 views

How to get used Resources by State/Map etc?

I'm now managing the Loading of my Resources and I got a Question in my mind. How does my Resource Manager know which Sprites,Sounds, etc. are used by the Map I want to load? First I thought of files ...
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3answers
415 views

Calculating Projectile Movement

I'm having some trouble putting together a method that will constantly move a "bullet" in the same direction accurately. Here is what I have so far public Vector3f moveFromPosition(Vector3f location, ...
3
votes
1answer
96 views

Texture loading: Everything at once OR un-/loading the needed assets? [duplicate]

Good evening. We've been developing quite a huge game for android on the basis of AndEngine. So we have a lot of assets to load, especially textures. At the moment everything (sound, textures etc) ...
2
votes
1answer
172 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 ...