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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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). ...
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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
44 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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2answers
67 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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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 ...
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2answers
88 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 ...
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3answers
216 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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1answer
58 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
47 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
53 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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1answer
110 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
62 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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1answer
86 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
122 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
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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
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1answer
31 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
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1answer
72 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 ...
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1answer
167 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 ...
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1answer
79 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 ...
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1answer
201 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 ...
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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 ...
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1answer
57 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 ...
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1answer
64 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 ...
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1answer
47 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 ...
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1answer
62 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 ...
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1answer
72 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 ...
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votes
1answer
129 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
59 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
88 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: ...
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vote
1answer
167 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: ...
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0answers
47 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() - ...
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1answer
90 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
97 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 ...
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3answers
111 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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2answers
96 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
64 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
118 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 ...
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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) { }
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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
73 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
100 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
75 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
55 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
87 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 ...
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0answers
49 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 ...
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vote
2answers
126 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) ...
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0answers
24 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
107 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 ...