Questions tagged [java]

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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7 views

LibGDX TextButton removes numbers from string

I have been having a unique problem with the LibGDX TextButton. In some cases, when setting the text of the button, the string lacks numbers (even though they are present in the string which can be ...
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74 views

Use of java for game dev, must I pay for it?

I would like to start programming a video game using Java. This will be my first video game. I choose java because of portability, so I develop the game and then it run on every system. But now I read ...
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How to draw skin face minecraft modding

I'm making a target hud which shows the information of the player you are fighting. I wanna take the face of the target and draw it on the screen. Any help?
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1answer
72 views

Best Practice for Procedural Generation and Code Updates

I am using an initial seed to generate data. The question I have though is what is the best way to mantain the information with code updates. For example if I have something similar to: ...
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Libgdx sidebar like in Tibia

I'm new to LibGDX and I'm trying to make a simple RPG game. I've implemented a basic movement & combat system. Now I would like to add a sidebar with inventory, character information etc. (like in ...
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How to get player coordinates in Minecraft Forge?

I'm currently working on a Minecraft mod (Minecraft 1.12.2) using Minecraft Forge where the player can use a hotkey to send out a "SOS" message in a discord-server using a discord-bot. This ...
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1answer
25 views

LWJGL2 Camera Movement Stutter

I'm having quite some trouble with camera stutter in my LWJGL2 game. The stutter only occurs when moving the camera. When it stands still, the scene is rendered smoothly. I could verify that by ...
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How do I make something like Minecraft's crafting table

I'm making a mod for version 1.16. I want to make a crafting table with 3x3 grid which is automated. I need it to implement and read other mod recipes and minecraft recipes. I need to know how I to ...
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How to find the locations of all the trees in Minecraft?

I am working on coding a bot for Minecraft in Java. The first step is to find trees in the world. I am using mcp-reborn (so basically the source code) but answers in Forge can also be useful to me. I ...
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1answer
41 views

ParticleEffect using TextureAtlas in libGDX

I am using ParticleEffect with a texture stored inside TextureAtlas. The code below shows how I load a particle: ...
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2answers
161 views

How would I actually implement A* pathfinding in a 3D world?

I have been trying to implement pathfinding in Minecraft for a while. Everything is in blocks, so this shouldn't be too difficult. I have gone through a lot of different posts and articles but I haven'...
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1answer
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Only Square Textures loading correctly (Beginner question)

(Sorry if this has already been asked, I couldn't find any other question or source describing my problem) Okay so basically Square textures load and display just fine. But for some reason, when ...
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66 views

InvalidPluginException: Unsupported API version in Minecraft Mod

build.gradle For Compile ...
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Java/LWJGL 3 Optimization and Render error

(I asked the same question on StackOverflow but didn't got an answer. It's the first time I post here so idk if this is not allowed or anything, so if it is please tell me) I was following ThinMatrix'...
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I'm following a tutorial but I don't get the same result; why are the raytraced shadows not working?

I followed this tutorial called "Ray Tracing in One Weekend" by Peter Shirley. And I implemented the java version of it for studying Ray Tracing. Everything was all right until Diffuse ...
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2answers
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Shooting from Gun in LibGDX

I'm trying to shoot a bullet from the tip of a gun. This gun is a Sprite object and it is constantly being rotated to point towards the mouse. The issue is that the point to shoot the bullet from is ...
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35 views

What math function represents Minecraft bow angle/height?

I am working on a mod in Minecraft Forge/MCP using Java. Aiming a bow is controlled by your head pitch and yaw rotation. Right now I have a math function that automatically looks at the target. But I ...
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1answer
47 views

How do I predict where a player will be next in Forge/MCP?

I am trying to predict where a player will be next based on where they are now in Java. I have their XYZ position, their XYZ motion, but I don't have their speed. How can I predict where they will be ...
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43 views

Can a 2 player mobile game support P2P if a dedicated server is used to establish the network?

The dedicated server would be a lobby where all the players connect and find matches. Once a match is found the server hooks to two players and sends them off on a p2p network. Once the match is over, ...
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1answer
62 views

How to execute code more frequently than once per tick in Minecraft Forge/MCP?

I'm working on a mod for Minecraft in Java. How can I make something happen every half tick? If I run my code in the tick function, my code is called 20 times a ...
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1answer
214 views

Java Simple 2D Grid Pathfinding

I want to code some basic pathfinding for my bot in Java. Below is a 2D grid representation of the 3D world. 0s being the places you can go, and 1s being the places that you cannot go. ...
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35 views

How to find player movement speed in Forge/MCP?

I want to predict where a player will be next based on where they are now. I have access to their XYZ, their motion in each direction, but I don't know how fast they are moving. Let's say that the ...
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32 views

ECS multithreading without value types?

Im working with an Java based ECS framework called "Artemis ODB". Its great so far but it lacks multithreading or jobs. So i wanted to add them by myself. I actually wanted to give each job ...
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1answer
31 views

Move between two points at a constant speed in LWJGL

I've been making a game engine in lwjgl and I have been trying to get an ai to move from one point to another. I used a lerp method but the speed is dependent on the distance between the two points, ...
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26 views

Weird Collision Response occurring between 2 objects

I have been trying to program collision response between two objects (with AABBs) and the response is not what I except. Instead of bouncing off (reflective to the collision normal) each other the ...
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1answer
71 views

How to interact with inventory only and not the game

I have created an inventory in which you can select some objects that you can spawn. This is a button in a table in a inventory class. Spawning is done via left mouse button (just click on some ...
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LWJGL Using gl_VertexID properly?

I've gotten back to making lwjgl games, and I'm trying to make a sort of wave type vertex shader. I call this to make it wave: ...
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1answer
66 views

2d zooming function using transformation matrix

I'm trying to create a sort of "graphing calculator coordinate system" where you can zoom into a point by scrolling with the mouse wheel. I'm using javafx's transformation matrices (Affines) ...
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26 views

In the ECS on my server, how should I organize components along with systems?

A quick note about my server is that it executes game logic in 250ms intervals. I am trying to wrap my head around how to do this. The main issue I have is currently that I have the map of entityIds ...
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37 views

How can i fix my enemy movement, and collision?

I recently started a project with some friends, Its a simple java game and im having issue getting the Collision and enemy movement working properly. Using this: ...
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1answer
36 views

LIBGDX ShaderProgram not passing uniforms

I'm trying to implement a Shader that turns any RGB values below 190 into black. LIBGDX code: ...
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In my Online multiplayer quiz game how can i make players to join and compete at a time?

I am creating a multiplayer Online quiz game in Android Studio using Java. I am having players registered using Firebase in my app. Ok so the main thing is , I'm having different set of quiz ...
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1answer
62 views

Very small line when two sprites are exactly next from eachother

Recently, I have been thinking about a hangout game, not really need to go into detail, because I am focusing on creating the engine itself. Basically just to make my brain not hurt while making the ...
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57 views

OBJ file loader texture coordinates ‘scrambled’

Edit I've rewritten the loader to duplicate data if only one element (v, vt, vn) is different. I get a much better result, but it is still incorrect. The seams on the mesh match what they should look ...
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32 views

How do I get the player from the LivingEntity so I can make this knockback effect on the amethyst sword?

Like the title says, how do I get the player from the LivingEntity so I can make this knockback effect on the amethyst sword? i want the amethyst sword to give knockback 10 to any entity i hit and in ...
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27 views

Delayed rendering of object sprite

I'm trying to replicate an odd feature of an 2.5D online Fighting Game named Grand Chase - that I believe it's is made to hide the latency between players. However, I do not know what exactly is this ...
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1answer
114 views

Building an LWJGL jar file - java.lang.NoClassDefFoundError

EDIT: Recently got it working by making a batch file that does this: set /p CP=<cp.txt java -cp %CP%;testing.jar me.pale.main.Main and cp.txt is this ...
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38 views

Rendering to BufferStrategy gives absolutely no output despite following instructions

I am following this YouTube tutorial by TheCherno to make 3D graphics using Java Standard Library. Display.java ...
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46 views

LibGDX: How to grow button height downwards in Table?

For my layout, I have a Table in which I add TextButtons with a height of 20. I also set the height of the table to 30. When I now increase the height of one button to 30, the height grows not ...
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14 views

Directional lighting messups with uniforms

Recently, I've been making a 3D game, and I have more progress! I am trying to implement lighting, but when I want to change the directional light uniform manually, it gets weird. Here's an example ...
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26 views

How to add level-by-level game camera following in 2D java game?

I've been working on my first game recently, and I've built a player tracking camera that works great, but my goal for the game would be to have a camera that is fixed for each area that the player ...
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1answer
83 views

opengl (lwjgl) - only white triangle gets rendered, vertex and fragment shader not responsive

Currently my program can only render my vertices as white and changes in my vertex and fragment shader don't change what gets rendered for some reason i.e: (...
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70 views

How resource-intensive is the java.awt.Graphics2D object at different screen resolutions?

I'm currently making a 2D RPG in pure Java (yes, I know other frameworks/engines exist xD). I just created a resizing algorithm and I've noticed that different resolutions result in different FPS ...
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26 views

How can I parse all items in the Minecraft chest getting all data from each item? (including custom item description on servers)

There is an items store on the server I'm playing on. What I would like to do is to parse all items in this store so I can quickly find a needed one. Since I'm 99% sure there is no ready-made ...
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22 views

Setting a TiledMapTiledLayer equal to another TiledMapTileLayer?

I am attempting to create a reset button in a simple isometric libgdx puzzle game I am making utilizing libgdx. I am using the TiledMap object in order to render my map. Within my code, I edit some ...
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1answer
37 views

Timing User Inputs for Inventory on 60UPS game loop

I'm making an inventory system for my pure Java game right now. Currently, the game runs at a 60UPS, and inputs are checked each update. I have inputs set up using arrays of the current update and ...
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66 views

How to port/convert a Java program to mobile?

I have coded a simple video game in Java. It works fine on all computers that have Java installed. However, I would really like to play it on my smartphone and it would also be nice to be able to play ...
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60 views

How to move player camera with mouse in LWJGL 2?

I making a 3D game like Minecraft in LWJGL 2 and now, I want to move player camera with mouse like Minecraft. Here are the codes I have: com/kg/kgcraft/KGCraft.java: ...

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