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

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Java keyListener animating bufferedImages

I am making a game similar to a photo scramble/unscramble game which requires the use of keyListeners. I set up the logic but when I code the animations, they just sit there and do nothing and ...
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1answer
34 views

Java Move towards point

Ive made this 'game' where you can fire an aibility (a fire ball for instance) from the player towards the mouse (to the point where the mouse was at the time of casting/fireing/shooting the ball), ...
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48 views

libGDX render 2 tiled maps at different coordinates

I am currently learning libGDX and I want to make a game that loads multiple tiled maps and renders them. This is what I have now: public class PlayScreen implements Screen{ private Main game; ...
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1answer
46 views

Java 2D Game Development - Best Performance With Rendering

I have seen two different rendering methods. One of them is rendering multiple bufferedImages like g.drawImage(image1 to imagexxx, x, y). Like in my game I have to render, on each tick, 880 buffered ...
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3answers
135 views

How do you get the best rendering performance in a 2D Java Game?

I have seen a lot of tutorials, and they develop games with 2 different ways: The first one is using a virtual image (BufferedImage) and filling it's pixels. And displaying virtual picture. private ...
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0answers
193 views

Load ads in splash screen?

I have some ads that take a very long time to load. I was wondering it it is possible to have them load while the use was in the splash screen. I have looked at this answer: ...
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2answers
87 views

How to check if an GameObject exists in Unity2D? (Javascript)

Im making an AI that checks if the player exists or not. How do I check if a certain object exists and put it in a boolean variable?
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1answer
331 views

Libgdx understanding screen size

I'm trying to create my own jumper type game where the player moves up through an infinite y value. The problem I am having is getting the screen size to match up with the android screen. viewport ...
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1answer
75 views

Good Resources for Random World Generation [closed]

Is there a good reference or tutorials available for adding world generation into a 2D game? I've gotten to the point where I have most of the resources available to add world generation but I don't ...
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1answer
34 views

LibGDX - Map Boundaries

Synopsis Well, I'm making a little top-down JRPG and today I was like 'Yeah, I'm gonna bust out this whole map collision thing!'. I failed. Problem So I went on the internet and looked up 'LibGDX ...
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1answer
30 views

Reading from txt causes null pointer exception [closed]

I'm reading from this text file called beatSheet.txt. A: 100 A: 101 A: 102 A: 103 A: 104 A: 105 A: 117 A: 120 A: 122 A: 126 A: 128 A: 129 A: 130 A: 131 A: 133 A: 138 ...
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1answer
64 views

My Java game fills the system memory [closed]

edited. I am writing my first game using LIBGDX. The issue I'm having is that the system memory completely fills up and then even the swap file starts to grow. From what I see, the memory fills pretty ...
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35 views

Rhythm game timing not accurate enough (CPU workaround?)

I had an idea that I would 'play' my rhythm game first and have the times at which I hit the key output to the console, so I could use those values minus the hard coded in time it takes an object to ...
5
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1answer
99 views

Horizontal lines between vertices do not render

Good day, I am using LibGDX to try to render a mesh for a hexagon board. I can render the triangles, which is great, but I am having an issue rendering all of the line segments for the mesh and I ...
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votes
1answer
69 views

How would I implement a realistic stock market?

I'm making a corporation simulator, and it contains stocks. In the game you can buy and sell stocks, but I can't implement a realistic change in the price for them. How do I make them change up/down ...
3
votes
3answers
174 views

Using two languages in a game engine?

I'm thinking about making a game engine as a learning project. I know Java the best and I figure most of the code is not going to be running that much of the time, (20/80 rule) so why not write most ...
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0answers
23 views

Java Rectangle Collision Glitch

I have a platformer type game where I have a level builder(reads a .png file and converts into a level where there are rectangle boxes). I have rectangle collision on the boxes but when I make my ...
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0answers
35 views

Problem with Collision Detection

So I am adding collision detection into my game but whenever I start the game I get a rendering crash saying that there is a 'Game.update() failure - check the game code.' I have repeatedly tried to ...
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2answers
98 views

OpenGL — Better to switch out material or shader for changing object colors?

I'm fairly new to shaders and OpenGL so bare with me please, I just want to make sure I'm doing it correctly! Now I'm using LibGDX in order to create a simple 3d diagram for my company. I have a few ...
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1answer
32 views

how to set in vector float x y coordinates [closed]

i am use eclipse java android i am try to projectile trajectory in my game like angry birds example here ...
3
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4answers
3k views

libgdx - collision detection with tiled map java

currently, I am working on a 2d rpg game which is similar to final fantasy 1-4. I can load up a tiled map and the sprite can walk freely on the map. However, I will like to create a wall for it to ...
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0answers
16 views

How to pass a java string variable from android activity to unity3d C# script variable?

Require some help to pass custom autogenerated text from android activity to unity3d activity being started.
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3answers
112 views

libGDX best way to do Game States

I'm making a JRPG in libGDX, and I'm working with Screens. I have a main Screen called GameScreen, a screen for battles called BattleScreen and I want to make a screen for managing party members and ...
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1answer
47 views

My game has messed up layouts!

Earlier, I asked this question: Landscape mode for game? Where I had a directory for each and every layout, but the layout in the layout-land directory wasn't showing up when positioning my layout in ...
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vote
1answer
24 views

Error When Loading a .tmx TILED map through the TiledMap class

So I made a map using the TILED application and I have it as a .tmx for reasons, but whenever I use the TildMap class in the Slick2D library to render the map on the screen, it gives me an error. Here ...
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1answer
72 views

Is It Better To Generate A Pre-Generated Map or A Randomly Generated Map When Using Tile Properties? [closed]

So I am contemplating whether or not to add a Pre-Generated Map or a randomly generated map into my game. But I also need to add Tile properties into the map (i.e. so that water tiles aren't being ...
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2answers
114 views

How to make a “Camera” in Java

I need some help with getting my camera to work in java for a game that I am making. The problem is is that I've never made a camera in a game before and this is my first time trying to make one in a ...
4
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1answer
95 views

How do I do selective water surface rendering?

I have a shader that renders the "texture" of a very realistic water on a tile in the 3D world using a Frame Buffer. The problem is that, for example, I only want to render the part that isn't below ...
2
votes
1answer
38 views

Use an int as a reference to a specific class

So I'm trying to make an efficient game where there is a grid system and every grid has a number that is able to identify what kind of block is located there. This lets me just have an array of ...
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0answers
45 views

Landscape mode for game?

TL;DR: I have made 8 new layouts for each activity layout, but they are not showing up. For example, I have a layout-land directory with a layout, but that layout doesn't show up when I turn my phone ...
3
votes
1answer
75 views

How do I stop my timer when I close my game?

Background: I have a background service with a timer. It opens up a new activity when 20 seconds are over. Currently, my app is using componentCallbacks2 to detect when the user has pressed the home ...
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1answer
43 views

JAVA: Unformed Sprite When trying to Read SpriteSheet

So Im a beginner experimenting with ImageIO. Can someone tell me why im getting this pixelated-incomplete sprite? Here's the code public BufferedImage getImage(String location) { try { ...
0
votes
1answer
27 views

FollowPath steering behavior

I'm having a problem with AI movement in my top-down game. AI builds path and than moves using libgdx FollowPath (this problem is still actual) steering behavior. I have some solutions, but can't ...
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0answers
22 views

Libgdx Box2D - Object not showing up

I am trying to put a sprite into my b2d-world. But for some reason, it is not showing up. I've already checked the camera settings, they are defenetly correct. Then I came to the point to check the ...
3
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2answers
1k views

How to implement the server-side game loop?

The server needs to handle the physics, because all the movement will be handled by it. So for that I need a game loop. The thing is that the server doesn't have the render part, it's just a console. ...
0
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1answer
115 views

OpenGL One Color Per VBO

Recently I have been working with OpenGL and have decided to use colors instead of textures. However, since the project I am working on is going to have a low-poly look, I want each color to stand ...
3
votes
2answers
198 views

Adding two classes with arithmetic math [closed]

I'm trying to figure out how to add two classes together with a simple arithmetic addition The class i've written is a Vector3 class it looks like this public class Vector3 { public float x, y, z; ...
3
votes
1answer
87 views

Resolving collisions with float precision errors

I'm facing a problem when I try to resolve the collision between two units using floats as positions of the units in my game. I am detecting the collisions using the SweptAABB algorithm and if there ...
2
votes
2answers
35 views

How can I automatically fit elements in libGDX layouts?

Recently I wanted to use libGDX's Table to show four buttons. But my table doesn't fit on the stage: Here is the code I used: table.add(new GameButton("1")); table.add(new GameButton("2")); ...
3
votes
2answers
167 views

How can I support remappable controls?

I am trying to allow players of my game to remap the controls (eventually from the menu). Currently, some of the buttons have been defined, but they can't be changed. They are hard-coded. For example, ...
3
votes
1answer
76 views

VBO rendering crashed with glDrawArrays

I'm playing around in LWJGL3 and I'm experiencing an issue regarding glDrawArrays. At glDrawArrays the JVM crashes. I'm using modern OpenGL and therefore I have my own shaders and matrix ...
5
votes
1answer
98 views

How do I avoid floating point indeterminism when implementing lockstep?

I am working on a multiplayer RTS game in Java. It uses lockstep for networking, which requires that both computers can deterministically. These are the 2 closest/more viable approaches I could come ...
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2answers
211 views

Libgdx coordinate system

I just started with libgdx and I'm still figuring out how the coordinate system work.The code below would draw the image at [0,0] without the Orthographic camera What I can't understand is why the ...
0
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0answers
9 views

What is vector<E> how to use in android java [duplicate]

I making game i want use vector into velocity,position and rotation. But i don't know how to wark vector so please help. Thank you
2
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0answers
39 views

Fixed timestep periodical “lags”

I have fixed timestep code in my main thread, it looks like this: float oldTimeSinceStart = 0; float accumulatedTime = 0; float maxDeltaTime = 0.1f; // 10 FPS float fixedTime = 0.016f; // 60 FPS ...
2
votes
1answer
31 views

Call function via ContactListener

I've been creating a game on my own in LIBGDX, BOX2D and there' s a problem I can' t solve. When two World bodies collide, method "beginContact" is called in MyContactListener class that implements ...
0
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3answers
163 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 ...
3
votes
2answers
122 views

How do I test for intersection between a ray and a cone?

I decided that writing a ray-tracer in my game was a brilliant idea, and so now I am looking for code to use for ray to primitive intersection tests. I have based my effort on this very nimble yet ...
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0answers
31 views

Rendering BOX2D shapes with LIBGDX

I have been creating a game on my own and I need a little help to begin with graphics. I haven' t found much in the internet about this topic, so I came here. Right now I've got a chainshape that i'm ...
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0answers
52 views

Marching Square Generated 2d Terrain: Dealing with more than 2 tile types

I need some help with my random map generator. First, I use a noise generator (something like Perlin noise) to create my tile array. For now i'm using three tiles: water (0), beach (1), and grass ...