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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2answers
59 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 ...
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2answers
94 views

How can I end my game when the right character statistics get to 0?

I'm creating a text-based RPG game. In my game, a player has five different stats, which might decrease over time as the player does certain things. public static int HP = 100; //CHARACTER ...
2
votes
3answers
219 views

Generating 3D-like effect

I'm making a 2D sidescroller game and want to give the blocks a 3D like effect. This way it looks like the player is walking on 3D blocks while walking on a 2D plane (thus having only x,y ...
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votes
1answer
69 views

Why table in libgdx game give wrong position

Can anybody guide me, I am creating a table in libgdx game on menu screen to set different buttons on my screen. here is the code for table draw table.setBounds(0, 0, Gdx.graphics.getWidth(), ...
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1answer
54 views

Is the standard collision detection in Slick2D too heavy for broadphase?

I was wondering two things about the built in shape detection of Slick2D. When executed on a lot of shapes, how performant are the intersects and containsmethods, and what kind of algorithm is behind ...
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0answers
62 views

Google Play Game Services Logcat warning

I'm getting the following warning in my LogCat output. I have implemented Google Play Games Leaderboards which, after some research, it appears this warning is related to.... I would point out ...
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vote
1answer
114 views

VBO -> How should it be done?

I'm very new to OpenGL/LWJGL. I'm reading a lot of VBOs. I'm sorry if I can't concretise my concern, but i'll try it: Why should I use VBOs? Whats the difference between using VBOs and glBegin() ...
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0answers
86 views

Android: Asynctask causes ANR (very) intermittently

I'm doing some work on an AsyncTask (creating game objects, loading resources etc) while displaying a static splashscreen. The problem is that every now and then, the AsyncTask doesn't run and the ...
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votes
1answer
98 views

How do I calculate the bounce vector of a ball hitting the starting point of a segment?

I have a ball (with parameters x, y, radius) that travels on the screen (with vectors directionX directionY) and can collide with a segment with random slope (with parameters startX, startY, stopX, ...
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2answers
204 views

Resizing a Framebuffer Object (ie: its attachments) on Screen Resize

I have been experimenting with some post-processing effects and I have been using FBOs to store stuff. The problem is, I attempt to resize them when I change resolution. I get no errors, however the ...
7
votes
5answers
2k views

How can I mark levels as “complete” in a way that prevents cheating?

My first thoughts about marking levels complete is to just write the information to a file upon level completion and load that in once the app is opened up again. But how could I keep this safe from ...
0
votes
1answer
33 views

Slick2D Graphics Misaligned

I'm working through a game in Slick2D and am now focusing on a lot of the graphical end. It's going pretty well other than a couple of issues with alignment. An image illustrating both of these issues ...
2
votes
1answer
93 views

Libgdx Actions interpolation Fadeout

In libGDX there is a simple fade Interpolation that speeds up towards the end of the action animation. But what I am looking for is the reversed of it, it needs to start fast and slow down near the ...
0
votes
1answer
192 views

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

Overview Guys really hopeing 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 ...
0
votes
1answer
109 views

Move Box2D body towards mouse click

In a top down game using Box2D, I would like the player's Box2D body to rotate towards the mouse click, and then move to a point on mouse click (move, not teleport). I have worked out the rotation ...
0
votes
1answer
229 views

Organising data of a turn-based strategy

I'm intermediate in Java but novice in everything which is on the server-side. I've set myself a task to rewrite an old game, so learning Java is more fun. It is a space turn-based strategy. The ...
1
vote
1answer
44 views

Why is the Hiero font not coordinated to fit neatly in the display window?

I imported a font with Hiero and I draw the font like: font.draw(batch, "1", 0, 48); This is the resultant image: So the font it moved up to hit the bottom perfectly, but it doesn't touch the ...
0
votes
1answer
60 views

How to detect if players alter game files and stop them from entering the game server [duplicate]

as the question says. how can i check if a player modifies a file such as maps or spells in my rpg games that will be located as "/cache/spells", "/cache/maps" or "/cache/entities" and you get the ...
0
votes
1answer
70 views

How to Render an xml tile grid in java [closed]

So i decided to write my games data files in xml since a lot of people recommend it security wise for an online game, but how exactly does one render an xml tile grid in java? format will be as ...
0
votes
1answer
59 views

Slick2D re-starting particle system/emitter

I am trying to use a particle system/emitter in Slick2D to produce a thrust jet from a space ship. I can get the emitter running continuously without any problem, however I can't get it to run for a ...
0
votes
1answer
77 views

glVertexAttribPointer stride ambiguity

As a hobbyist junior game programmer, I have done multiple small OpenGL projects just to have fun with 3D. I've tested VBOs in C++ and in Java and I found something or rather understood Java tutorials ...
1
vote
1answer
77 views

Synchronization with game tick

I'm working on a multiplayer game and it's currently set up like this. It accepts packets from the client on the fly and does whatever processing it needs to. There is also a main game tick which is ...
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0answers
21 views

Intermediate AI for Java games [duplicate]

I want to know how to create good AI for a Java game, I'm still learning the language and I'm not an expert. I can do static AI but wanna know about writing an AI that follows the player and ...
0
votes
1answer
150 views

2D Tile Movement in Java

I have this tilemap and a player in my game, and I got the player to move by adding the velocity to the position. However, it is very hard to control the player exact this way of the tilemap. So, I ...
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0answers
69 views

Slick2d - Why is my init() method running twice?

In the init() method, I have called the method loadMap() from the "world" object. But it seems to be called twice. I do not want loadMap() to be called twice. I have no idea why is this happening. ...
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votes
2answers
123 views

Mysql database reading and writing [closed]

In my Libgdx application I would like to be able to connect to a mysql server securely and read and write data from it without other users injecting, or changing information. I've found this: ...
1
vote
1answer
173 views

How can I render a JBox2D ParticleGroup?

I want to render a ParticleGroup from JBox2d using OpenGL. I've managed to define a particle group area, but I'm unsure how to draw the individual particles. Here's how I create the ParticleGroup: ...
0
votes
0answers
48 views

LibGdx - Rotate sprite with mouse [duplicate]

I'm trying to rotate the sprite with the mouse but nothing will happen. void mouseMove() { float angle = (float) Math.atan2(562 - Gdx.input.getY() - player.getY(), Gdx.input.getX() - ...
0
votes
1answer
122 views

Typing text animation (dialogue) libGDX or in general

Can anyone think of an efficient way to animate the typing dialogue text as found in pokemon? I have a vague idea of using string.length, and having a new letter drawn every .2 seconds or so, but ...
1
vote
1answer
118 views

LibGDX Touch Delay

So I'm trying to make a game in which you have to tap things fast, but the thing is - after you touch something (the area I chose), it takes like 2 more seconds to register another touch. Now, I think ...
0
votes
3answers
159 views

(LibGdx) Get mouse position in ENTIRE game [closed]

I'm trying to get the mouse position IN GAME. By that I mean not the position on the screen, but inside the window. I've been using Gdx.input.getX(), but that's not INGAME. How do I do this?
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vote
2answers
98 views

Memory strategy for multilayer, tilebased maps

I am currently developing a 2d mmorpg and am having some memory issues with regards to my tile based map. The client takes a little while to load and then sits around 1GB ram, because I am loading ...
0
votes
1answer
66 views

Handle Entities & Collision in large numbers [closed]

I am creating a simple 2D maze game and I am a little confused about entities & collision detection. At the moment, my entity class is an abstract class containing position, velocity, sprite and ...
0
votes
1answer
128 views

How can I smoothly move from tile to tile?

I've looked at other games with tile based movement. I am aiming to create a game like pokemon, where the player moves smoothly to the next tile. I am using KeyAdapter, in my KeyInput class. This ...
0
votes
0answers
12 views

How to loop through tiles in libGDX [duplicate]

I just need a for loop to show me all of the tiles in a tiled map. for(Tiles t: thetilemap) { }
0
votes
0answers
49 views

Is there such thing as a design pattern for game character attributes? [duplicate]

I'm toying with the idea of a character based game. The characters, robots, monsters, heroes (and weapons I suppose) will all have various attributes as per a D&D game for example. They player ...
0
votes
1answer
92 views

Rotating and scaling textures built up of pixel arrays in java?

I'm making my first real game, in Java, and I'm currently working on the base system, for rendering images (sprites) and I wonder how I can rotate sprites. My sprite class looks like this: ...
1
vote
1answer
128 views

how to remove game objects after on overlap in LIBGDX game

I have gold stars in my game that give score to game hero if the hero overlap with the star. What I want is to remove star once it overlap with hero object. I give score by checking overlap with this ...
1
vote
1answer
88 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 ...
1
vote
0answers
63 views

Broken World Generation [closed]

I am learning to write java/mod Minecraft. The mod I am working on is just a "Can I do it?" Kind of thing and I have no intention to distribute it. The problem I ran into is when I try to generate a ...
1
vote
2answers
92 views

Make square walk by rotating around corners

I in the very beginning of making a small game, and I'm having some problems getting the basic movement of my character. My character is a square that can be moved by rotating around a corner. The ...
0
votes
0answers
63 views

Slick2D ComponentListener added to MouseOverArea not responding to right mouse clicks

I am developing a UI using Slick2D and experimenting with MouseOverArea. I have noticed that if I add a ComponentListener to my Button (which extends MouseOverArea) it only responds to left-clicks on ...
1
vote
2answers
128 views

Boost per-pixel rendering

I'm writing my own renderer in pure java without any external libraries. I'm using per-pixel rendering. I'm rendering an image with this method: public void renderImage(int x, int y, RawImage image) ...
0
votes
0answers
25 views

rotate to movement direction [duplicate]

If I have a player character that can move 8-directionally, I can set the rotation of the player to face the direction of movement. But if I want to smoothly rotate to a direction, sometimes the ...
1
vote
1answer
114 views

Delta time not accurate enough

In my game i have a delta timer based almost exactly on the page from here http://wiki.lwjgl.org/index.php?title=LWJGL_Basics_4_%28Timing%29 But if the the main loop is fast enough, my delta time ...
0
votes
1answer
154 views

Smooth Npc Movement

I have an Npc in my rpg that moves around based on a Random() variable. My main goal is to have him walk in a random direction a small bit every 2 seconds. I only want him to move about 32 pixels ...
1
vote
0answers
52 views

How to eliminate the outline in libgdx?

I'm recently started working on a game in libgdx, and I've run into the problem that my sprites tend to get a thin, whitish outline around them. This is especially a problem for me since I'm working ...
1
vote
2answers
133 views

Optimizing Collision Detection in a 2D Game

I am optimizing my "little" Java (LibGDX) shooter game, and perhaps unsurprisingly, collision detection is a "bottleneck"; I've kind of reached my performance goals already, but I want to tweak the ...
1
vote
1answer
87 views

Why would OpenGL ignore GL_DEPTH_TEST setting?

I cannot figure out why some of my objects are being rendered on top of each other. I have Depth testing on. glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); Do I need to draw by order of what is ...
1
vote
0answers
74 views

Lag when drawing single Texture multiple times in libGDX [closed]

I am building a game where you are basically drawing little dots on the screen with the help of the accelerometer. I am using a single instance of an Actor where I store the coordinates that needs to ...