Java is both a popular programming language and runtime environment which allows Java programs to run unchanged on most hardware and software platforms.

learn more… | top users | synonyms

0
votes
1answer
76 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 ...
1
vote
1answer
79 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 ...
1
vote
1answer
40 views

Understanding HingeConstraint in jBullet

I'm using the java port of BulletPhysics engine jBullet. I'd like to make a joints between 2 triangles so that one edge of the first and one edge of the seconds act like a hinge. But I don't ...
4
votes
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
votes
2answers
669 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) ...
0
votes
2answers
117 views

Where the physics should be put

I'm studying a book of artificial intelligence applied to games. It shows several algorithms for each argument (movements, path finding.. ecc). Unfortunately (but obviously) it does not explains how ...
1
vote
2answers
164 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
53 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
832 views

How handle nifty initialization in a Slick2D state based game?

I'm using Slick2D and Nifty GUI. I decided to use a state based approach for my game and since i want to use Nifty GUI, i use the classes NiftyStateBasedGame for the main and ...
0
votes
1answer
82 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")) { ...
2
votes
2answers
305 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 ...
0
votes
0answers
29 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 ...
0
votes
1answer
338 views

libgdx ActorGestureListener.pan() parameters not moving actor in smooth line

I override the pan method in ActorGestureListener to implement dragging actors in libgdx (scene2d). When I move individual pieces on a board they move smoothly, but when moving the whole board, the ...
0
votes
2answers
146 views

How should I access frame buttons from a controller in an MVC approach?

I'm developing an italian card game using the mvc pattern. I have the class GameFrame that contains the view. The user's card are buttons (JButton objects). I have 3 controllers: GameController: to ...
2
votes
4answers
159 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 ...
0
votes
2answers
376 views

Wall jumping collision detection anomaly

I'm creating a game where the player ascends a tower by wall jumping his way to the top. When the player has collided with the right wall they can only jump left and vice versa. Here is my current ...
3
votes
2answers
2k 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 ...
1
vote
2answers
89 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 ...
0
votes
2answers
74 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 ...
1
vote
2answers
636 views

Matrix rotation wrong orientation LibGDX

I'm having a problem with matrix rotation in libgdx. I rotate it using the method matrix.rotate(Vector3 axis, float angle) but the rotation happens in the model orientation and I need it happens in ...
5
votes
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
39 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
35 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; ...
0
votes
0answers
30 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, ...
1
vote
0answers
79 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? ...
0
votes
0answers
34 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
58 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
49 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 ...
0
votes
3answers
346 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
93 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
165 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
278 views

When should I load assets for optimal performance?

I'm writing a game using LWJGL and Java, and was wondering if there were best practices for when to load resources. I have seen examples that load all resources when initializing the game (XNA), ones ...
0
votes
1answer
30 views

How can I render a simple lattice in LibGDX?

I have searched all over, but I can't find what I think will be a simple answer. I am using Opengl ES 2.0, and LibGDX. I simply want to use GL_LINES primitives to create a lattice structure. I have ...
0
votes
0answers
62 views

Steering problem in 2d game

I am creating a little 2D non tiled top down game. The enemy uses steering behaviour for chasing player or wandering around, but I do not think my code is working as it should be. My problem is, the ...
0
votes
0answers
33 views

how to make a game object increase/decrease speed each time it touches the x and y edges

i am trying to make an object to invert its speed (increase/decrease) each time it touches the edge of the screen on either the x or y axis with javafx. public void Strategy(){ if ...
0
votes
0answers
35 views

Is there a way to capture back button twice in same activity libgdx game

Can anybody tell me if there is a possibility to capture back button twice in same activity in libgdx. What i want to achieve is that if the user press back button once the game pause. if in the ...
0
votes
1answer
55 views

Update Loop in libGDX

I have a screen class in libGDX. In this screen, I want to change a sprite's texture a certain number of times before the screen changes to a different screen class. I tried having a for loop in the ...
-2
votes
1answer
41 views

How can I format the number of digits my stopwatch shows? [closed]

I have made a stopwatch that displays the time in seconds during my game in libgdx. At the moment it shows a bunch of digits after the decimal point as it runs. Does anyone know how to change it so it ...
-1
votes
1answer
92 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 ...
0
votes
1answer
95 views

FBO and VBO for performance

I discovered VBO's recently and changed my code to use them instead of immediate mode. Now I'm rendering 25000 squares and it's really slowing down my FPS. If I drew all the squares VBO's to an FBO, ...
0
votes
1answer
95 views

How do I efficiently deal with entities moving between chunks?

I am working on a game in which entities need to be stored in chunks. This is the basic chunk format: public static Entity [row][column][entities] chunkEntities; However, some of my entities move. ...
1
vote
1answer
197 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 ...
4
votes
6answers
1k views

Should my game handle collisions in the Player object?

I'm making a 2D platform game. Right now I'm just working on making a very generic Player class. I'm wondering if it would be more efficient/better practice to have an ActionListener within the Player ...
0
votes
0answers
58 views

drift/skid in topdown racer with libgdx/java [duplicate]

I'm trying to do a simple top-down racing game and is struggeling to get the steering right. At the moment I'm using a very simple steering and want to add some drifting to the car. I've read some ...
2
votes
1answer
478 views

How do I use a JBox2D ContactListener to check if my character is standing on the ground?

I want to know when my character is touching a wall or floor. I've had no luck searching for information on this. I saw a few things about ContactListeners and getContactList(), but I don't understand ...
0
votes
0answers
71 views

Cross component communication -Java

I am making my first simple game engine and decided to go with a ECS (Entity component system) from inspiration from Unity. I spent quite awhile online trying to figure out how to implement it. I ...
0
votes
1answer
41 views

Dragging an object and moving it back to it's original position on release?

I'm making a small game, and I'm trying to add this mechanic where if you click on an object and move it, then you release the object it will snap back to it's original position. Currently, each ...
0
votes
1answer
65 views

Datastructure for infinite 2D map [duplicate]

I started a 2D Tilegame programmed with libgdx which needs potentially infinite tiles. That means when the player arrives the border of the map it should be possible to generate even more tiles. So a ...