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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1answer
93 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
97 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
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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
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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
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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
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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
482 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 ...
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0answers
75 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
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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 ...
0
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1answer
71 views

Can Java be used for developing games for Android in Unity3D [duplicate]

I only know Java Programming Language and no other. Can I develop games for Android in Unity3D using Java?
2
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4answers
378 views

Is it a good idea to make most actions in a game driven by simple tiny threads (in Java)? [duplicate]

I'm thinking of for example making the jump action of a character, that takes ~1s, a distinct runnable, so then other threads can read its state, with additional control over the action itself by the ...
2
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2answers
223 views

How can I compute which chunk a coordinate is in?

I am working on a video game. Everything (terrain, entities, particles) is stored in 100 by 100 chunks. Here is the array structure for the chunks: public static final int chunkSize = 100; public ...
0
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0answers
68 views

Minecraft Server - Get list of online players (Java)

My question is: How do I get a list of online players, not the count of the online players, in Java? //So I could call... String[] players = getPlayers("fnaf.hosthorde.net"); That is how I'd like ...
1
vote
1answer
51 views

How can I adjust my code to make the objects start dropping at a certain speed and then increase that speed over time?

I'm making a game in LibGDX where the player dodges falling objects. At the moment, my code makes each object (in this case 'DROPS') fall at random speeds. I'm wondering if anyone can suggest how to ...
0
votes
1answer
32 views

switch between player camera/non-camera positioning

Sorry if this sounds ambiguous. But I am writing a traditional top down game. And normally the player would be centered in the middle while moving the orthographic camera. However, I would like this ...
1
vote
1answer
185 views

Drawing Projected Vertices/Faces In Order

I recently created a 3d engine, and have gotten to what is (as I've found) the hardest part so far. I need to sort the objects and then draw them. I've looked at sorting algorithms, but my case is ...
0
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0answers
37 views

2D Platformer Pathfinding [duplicate]

First of all, I'm sorry, I know this is a really broad topic, but I've been trying to do this for days, I've looked at about a hundred different Google links, and I'm just not having any luck. ...
0
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0answers
21 views

How will i know if the Body is facing a the target angle [duplicate]

I want to know if the body of the car is facing the line on the picture
0
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1answer
22 views

On-screen counting within a certain time-frame

In my game the player can collect a 'virtual currency' - on the main menu I display the amount the player has collected. However, instead of simply displaying it, I want to count up from 0 to the ...
0
votes
2answers
103 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 ...
0
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0answers
20 views

How to display armor/equipment on a character? [duplicate]

I've been working on an Online 2D RPG mostly for fun and for getting a basic understanding of Socket Communication, packets, and just basic game development. Like most RPGs there is some kind of ...
1
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1answer
90 views

Implimenting BADLAND like Body Movement in Box2d

I am trying to make a body (character in my game) move and behave in the same way as the character in the BADLAND Game with regards to rotation. The character does not have fixed rotation and behaves ...
0
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3answers
93 views

Drawing sprites only under certain conditions - alternatives to using 'if statements'?

Within my game (which is Java/Android), I wish to draw a sprite only under certain conditions, so up until now, I've been using if statements to accomplish this. Something like so: if ...
3
votes
3answers
5k views

Find Point with only angle and distance

I'm working on a school project and we have to create a tank team with the programming game Robocode (tank battle with self programmed bots in Java). I have to program a scout bot that scans, finds ...
0
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0answers
36 views

how to detect collision with libgdx and tiledmap [duplicate]

As you see , it's a picture from my game map , i have to create a 2d rpg game when a character can do many things. Currently i'm looking for a solution to handle collision between the character and ...
0
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0answers
64 views

2D GLSL Lighting and Sprites

I'm trying to make a 2D game engine, and I really want to support ambient light as well as multiple point lights that you can define the color, intensity, radius, etc from uniforms in glsl shaders. ...
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votes
1answer
97 views

How can I get “Good enough” collision for entities? [closed]

I am developing a Pirate ship fighting game. It's a great concept: Ships firing cannonballs, sinking each other, having to work as a team to complete the mission... But.. I've tested it with about ...
0
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0answers
39 views

manipulate textures in real time using GPU

I'm looking for some way (tutorial, library or build in option) to draw texture on JMonkey in real time. So I have 2 images one a normal texture that is fairly big(4000x4000) and another much smaller ...
1
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1answer
115 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() ...
0
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0answers
40 views

Fake Lighting 2D Space Java

I have an image that I want to be used as the light. The white are should be drawn, the black should not. I need the light to be tinted to whatever color I pass to the light object. I have code ...
0
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0answers
27 views

VBO - Update Vertex data

My game will be a 2D Sidescroller and I'm working on moving objects around. Since I want to animate and move my sprites around, how do I update the vertex data? This is my current class for GUI ...
0
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1answer
35 views

Jmonkey loading texture from fails

I have the following basic code: public void simpleInitApp() { Box b = new Box(1, 1, 1); Geometry geom = new Geometry("Box", b); Texture cube1Tex = assetManager.loadTexture( ...
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1answer
41 views

Java game loop delta not working

Hello I have game loop where I can change framerate. But when I change framerate to other, delta time not working fine. For example when framerate is lower everything is faster. Here is game loop: ...
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votes
1answer
47 views

Java Game not rendering properly

Hello I have a game that you can play(duh). When you start the game a loading screen pops up and on the loading screen I display an image of an eye I drew. In paint.net they eye looks perfect but in ...
0
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0answers
18 views

Java JBullet rotating rendered rigidbodies

Hello I wan't to rotate object I wrote some piece of code but that don't won't to work. Here is this code: glPushMatrix(); float[] matrix = new float[16]; ...
0
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0answers
22 views

mouseWorld Coordinates Box2D

I have one simple question in Box2D: if you want to get the world coordinates of mouse, this is the function you gonna use in Java: void update(int x, int y) { if(mousejoint !=0) ...
0
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0answers
60 views

Java Collision detection

Hello have a game where you look for key cards. Which allow you to open certain doors. for example if u have a red key card you can open a red door. The problem is that when I don't have red key ...
0
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0answers
16 views

Java JBullet models not colliding [duplicate]

Hello I wan't to do model collsion in JBullet but that don't won't to work. Models look like have some invisble holes. Here the code for creating collsion shape: int triangles_count = (int) ...
0
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1answer
86 views

Java JBullet Mesh collsion problem

I have a problem with JBullet mesh collsion. Everything works fine when I create a mesh from my object without scaling, but the problem starts when I want to scale the object. I also tried scaling in ...
0
votes
1answer
220 views

How to define 648 units, with 22 different values in Java

A friend and I are currently looking at developing a game. We have 648 units that need to be defined, with 22 final values. To define the units in the game, we've created an abstract class with 44 ...
2
votes
4answers
8k views

Runescape Private Server - How does it work? [closed]

I've seen a lot of Runescape private servers lately. How do they work? Most of them are based on the old Runescape, but a few look exactly like the real Runescape. How do they make the servers? Has ...
0
votes
1answer
99 views

Java, Crashing with a Shader on Intel HD Graphics

I just got a new computer (Acer Aspire ES1-311) which has an integrated Intel HD Graphics card, and I noticed that this fisheye shader crashes my game (LibGDX game, VM Crash): varying vec2 ...
0
votes
1answer
85 views

Java LWJGL - Monster follow script not working properly

I have written a script to be set off whenever a player is within a distance of the monster. The script checks if the x position is greater than or less than the players x, and same for the z. (y is ...
1
vote
2answers
148 views

How do I limit the rotation speed of a mouse-following object?

I am trying to make a 2D top-down game where player controls a spaceship. The spaceship (a rocket) is just a sprite following the mouse cursor with a fixed speed and is always pointing toward the ...
0
votes
2answers
59 views

Simple LibGDX Pong game drag player instead of getting x position

I got a working pong game in LibGDX but when I touch the screen the player x automaticly jumps to the coordinates I touched. I wan't my game to detect I touched and then move the player to the ...
0
votes
1answer
85 views

Java LWJGL - How can I add water to my 3d world? [closed]

The title says it all, how can I implement a simplistic water system into my game? I am using Java LWJGL and OpenGL glsl shaders. I am still fairly new to game programming, and a complete noob in the ...
1
vote
1answer
1k views

LibGDX: Smooth movement on a grid based game

I'm making a game with LibGDX where the player is on a grid (like a Chess board). For now, I'm moving the player by teleporting him 16px in a direction. I'd like to use the delta time to make smooth ...
0
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1answer
156 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 ...
0
votes
0answers
41 views

onSignInSucceeded and onSignInFailed not called (Google Play Games Services)

Using the code below, can anyone tell me why my onSignInSucceeded and onSignInFailed callbacks are not triggered when signing in? It works fine if I extend BaseGameActivity, but when trying to extend ...