The Lightweight Java Game Library (LWJGL) provides access to high performance, cross-platform libraries OpenGL and OpenAL. Additionally LWJGL provides access to controllers such as Gamepads, Steering wheel and Joysticks.

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2answers
100 views

Add Objects in LWJGL without using glTranslationf function

It is possible to add an object in LWJGL without using translation function (glTranslatef) ? and if it is possible does this improve somehow performance ?
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0answers
48 views

How to use shader in order to render FBO lwjgl

I am making a 2D game and I want to make a light mask. So far i made a Frame Buffer where i hold my mask but I cannot apply the shader on it. When I don't use the shader the light map is drawn ...
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0answers
75 views

Offscreen frame buffer lwjgl

I want to create simple 2d lighting. So my idea is to render everything on the default buffer and then apply light mask. For the light mask i want to use frame buffer which later i will apply on the ...
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0answers
38 views

Can I “Pre-rotate” VBOs while loading them in LWJGL?

It is possible to flip VBOs horizontally and vertically by swapping around destination coordinates. Is it possible to rotate an image by any angle, such as 45 degrees, using different destination ...
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1answer
81 views

GLFW Fullscreen OS X in LWJGL 3

How does one create a fullscreen window properly in OS X from the code, instead of just expanding into the current desktop? I am referring to the sort of fullscreen window that one gets when the top-...
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1answer
263 views

Opengl Best VAO model for voxel engine

I make a voxel engine on LWJGL 3 (OpenGL binding for JVM). I store all object data in world class. World is subdivided into 32*32*32 chunks. Chunks use octree storage. The main part of all my ...
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0answers
655 views

How to toggle fullscreen with lwjgl

I'm using glfw in lwjgl-3 to try to create a toggleFullscreen method. However it always gives me errors. I saw this question Toggle Fullscreen at Runtime but it didn't help because glfwOpenWindow() ...
4
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1answer
2k views

Create the right pom.xml for LWJGL and Slick Project (Maven)

Can somebody tell me whats wrong with my pom.xml file? At this point I get this error if I start my *.jar file: C:\Users\Michael\git\freezing-robot\target>java -jar freezing-robot-0.0.1-SNAPSHOT....
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0answers
28 views

Create texture atlas from loaded textures - OpenGL LWJGL Java [duplicate]

In my program I have objects with different textures, that are in the same vbo. I cant have an array of samplers in my shaderprogram, so i have to use a texture atlas. I have seen some ways to make a ...
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4answers
961 views

OpenGL 2D Depth Perception

I have a 2D RPG game written in Java using LWJGL. All works fine, but at the moment I'm having trouble deciding what the best way to do depth perception is. So , for example, if the player goes in ...
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3answers
809 views

How can I move a created Image in Slick2D?

I want a image to follow the mouse, and I use Image class of Slick 2D: public void init(GameContainer gameContainer, StateBasedGame stateBasedGame) throws SlickException { mouseImage = new Image("...
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0answers
56 views

Vbo 3d triangle opengl w/ LWJGL

So i am using lwjgl, took me about 4 hours of hard work to achieve triangle rendering and vbos, now i want to render a triangle in 3d space. I know you have to use projection matrices. But when i have ...
3
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1answer
3k views

Using gluUnProject to transform mouse position to world coordinates (LWJGL)?

I have a little LWJGL application and I have been trying to figure out how to successfully use the GLU.gluUnProject function in order to transform a given point on the screen (mouse position) to world ...
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0answers
42 views

Slick2D Java Applet

I created small game in Java using Slick2d library. I wanted put my game into webpage as java applet like here. I added my site to java exception site list. When i try to run page it is wrote: "An ...
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0answers
39 views

Using AWT with LWJGL on OS X

The VM argument -XstartOnFirstThread is required for LWJGL to work on OS X. Anything in the java.awt package freezes the JVM when used with the VM argument -XstartOnFirstThread. E.g. java.awt.Desktop....
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3answers
308 views

OpenGL, GLSL, Modify Background Fill via Fragment Shader

I have noticed that fragments rendered by the glClearColor() method do not pass through shaders. However, I'd like to modify these fragments using my fragment shader. Is there any way of forcing them ...
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1answer
40 views

LWJGL not streching texture to quad

I'm having problems with texturing in LWJGL. The texture is not being stretched to a quad. As you can see, the texture is not being sized to the quad, marked with pink border. The problem doesn't ...
3
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2answers
4k views

Menus for LWJGL - Swing or other? [closed]

Okay so I want to create a main menu which includes several buttons and text fields, is there a built in library for LWJGL or would I use normal Swing and start a thread of the application? Its a 2D ...
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1answer
174 views

Cubemaps turn black OpenGL GLSL Java LWJGL

Recently I tried to add cubemaps to my 3D-rendering engine. The objects with a cubemap now turn completely black. This is how I load my cubemap: public static int loadCubeMap(String filename) { ...
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1answer
114 views

Processing through multiple shaders (LWJGL/Java/OpenGL)

Very simple question: Is it possible to process a vbo through different shaders? If so, how? What I want is sth like this: reflectionShader.bind(); //starts shader reflectionShader.load(some_values); ...
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0answers
67 views

LWJGL 3 - Random Sprites Don't Blend

Some of my sprites don't "Blend" in with tiles behind them Z-wise. glEnable(GL_DEPTH_TEST); Depth testing is enabled and works. glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, ...
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2answers
65 views

LWJGL True Type Fonts - Calculate width and height of box

I want to center some text on the screen. At the moment I divide the display height and width by two, and then render. But I also need the height and width of the textbox, so I can subtract it from ...
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0answers
189 views

GLFW - Event Polling System

I need some help on design. I'm making an event polling system, where a window is notified of events as they happen. I handle events at a system level in my GLFW backend, by using callbacks. ...
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1answer
268 views

glGenArrays - This functionality is not available

Whenever I call glGenVertexArrays(), I get the following exception: Exception in thread "main" java.lang.IllegalStateException: This functionality is not available. at org.lwjgl.system....
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0answers
135 views

Modern OpenGL Sprite Drawing - Not Rendering

I'm trying to render sprites based of this tutorial, in LWJGL. Here's what I have so far, with descriptions of what class I use: Transformable2D is a class that holds transform matrices meant for ...
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1answer
36 views

Triangle data structure not working for LoD algorithm

I would like to implement a LoD algorithm to my 3D game in order to simplify meshes at certain distances from the player. My meshes are created / loaded using a VBO, so the vertex data is stored in a ...
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0answers
114 views

GLFW/LWJGL black screen flicker issue

Im having a problem with creating a borderless fullscreen window in LWJGL using GLFW. It creates the (in this case black - as intended) window, however when the focus changes (f.e. tabbing int/out), ...
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0answers
79 views

OpenGL camera scrolling too fast

I'm using the code from this tutorial but in Java and LWJGL. The problem is I want the player to click and drag around the world with the mouse. I tried adding the mouse dx (velocity) to the camera ...
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0answers
61 views

Texture artifacts depending on texture size

I get some strange artifacting with textures depending on their size. I run OpenGL 3.3 with an GTX 580 so it should definitely support non power of two textures. I've narrowed down the problem ...
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1answer
341 views

OpenGL How to render a voxel based world scene with many objects

I am working on a voxel game engine using OpenGL binding for JVM languages (scala is my case) - LWJGL 3 for OpenGL version 4.5 . Currently I'm stuck with chunk rendering (32*32*32 blocks). To render ...
3
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1answer
250 views

How to render a curved horizon when rendering terrain far away

For games with long view distance, it might look at bit weird when you fly high above the ground and the horizon is all flat. So, how can I make a crumb/bend effect, when I fly high above the ...
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0answers
79 views

LWJGL - First time trying to implement shadow mapping

It's my first time when I implementing shadow mapping. My problem is shadows don't work in any way. First I just render all of the object to a FBO with simple shader. shadowMapGenerator.vs: #version ...
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1answer
73 views

Certain random content rendering differently

On the main menu of my game there is (obviously) several buttons. 2 of which, in different positions on different screens, render a different colour to the rest. As you can see below, "New game" ...
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1answer
83 views

LWJGL: loading textures of various types

I googled around a bit and nobody seems to have asked this question. I have images in multiple color formats (all of them are PNGs). Most of them are ARGB but my bitmap fonts are gray scale, and I ...
1
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1answer
49 views

How can I rotate a quad around it's center?

My code is: GL11.glPushMatrix(); // rotate around center GL11.glTranslatef(-200/2, -200/2, 0); GL11.glRotatef(30, 0.0f, 0.0f, 1); GL11.glTranslatef(200/2, 200/2, 0); // draw quad GL11.glBegin(...
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1answer
143 views

How can I blend up to 3 textures on a polygon without blend maps?

For my voxel game I need to blend up to 3 textures in the same polygon. It would be preferable if I could specify a texture id for each vertex, but other solutions are accepted as well. Here's an ...
0
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1answer
126 views

Free camera rotation in 3D space

I'm using a view matrix to do camera movement and rotation. viewMatrix = new Matrix4f(); viewMatrix.setIdentity(); Matrix4f.rotate((float) Math.toRadians(rx), new Vector3f(1,0,0), viewMatrix, ...
2
votes
2answers
258 views

Unknown length of primitive array

For my Voxel like game I need to generate terrain meshes from an array of ids. Because of that I have no idea how big the final vertex array will be. Currently I'm doing like this: generate mesh and ...
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1answer
71 views

Slick2D crashes on Image.getGraphics() on some machines

On some machines, creating a new Image and calling getGraphics() on it causes lwjgl to enter into some kind of faulty state that crashes when swapping buffers. Any idea what causes this and how to ...
1
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1answer
143 views

How can I manipulate a single pixel with LWJGL?

This is a very simple question. Is there a way to manipulate a single pixel? Here's an example of what I want in pseudo-code: while(gameIsOn) { renderAllObjects(); setPixel(x,y,r,g,b); } ...
0
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1answer
52 views

LWJGL Lighting advice / fix

Problem: The spotlight I've set up with OpenGL won't light up anything behind it, no matter what values I set for GL_SPOT_DIRECTION float[] LightDir = new float[]{0,0,-1,0}; float[] ...
0
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1answer
102 views

Handling collision with LWJGL rectangles

I'm testing collision with other rectangles so I can implement it into my current project. The problem is the rectangle starts at the right x and y, but I'm not sure where exactly they are. I'm pretty ...
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1answer
89 views

Drawing text with Slick

I've been trying to draw a text to the display using Slick. However, when ever I draw the TrueTypeFont to the screen, it draws it reversed upside down and also, it makes the whole display turn black. ...
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1answer
1k views

Slick2D: Changing an Image's colour to Color.white

I am working on a game where we would like the enemies to flash white when hit by a bullet. Ideally, we would like to use the same mechanism to render an Image in any colour. Our Images are all png ...
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2answers
111 views

Making an organized rendering class [closed]

I'm using LWJGL (opeengl wrapper for Java) and Don't know how to make a renderer class for OpenGL. So In Immediate mode rendering I'd do a method like this to draw quadralaterals. public static void ...
2
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1answer
69 views

JBullet - How can I make my object float on the water?

I'm trying to use JBullet for a ship PVP game. I've got two ships which are meant to rest on the water. Obviously these ships will be colliding, but the problem I have currently is "water" collision....
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2answers
816 views

Detecting a click on a tile

I'm making a simple tile-map system in LWJGL, and I'm trying to figure out how to detect if the mouse is clicking inside of a tile. So far no matter where I click it's always the same tile that is ...
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1answer
93 views

Opengl textures change color of everything

Whenever I render textures, all shapes get the color of the texture. I'm not sure why, but I think it's something to do with the way I render textures. Here's what I use to draw textures: public void ...
2
votes
7answers
3k views

Implementing pausing functionality

I'm working in LWJGL and trying to implement pausing when the user presses the 'P' key. Thus far I have this: boolean gamePaused = false; while(!Display.isCloseRequested()){ if(Keyboard....
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3answers
531 views

How can I access LWJGL's Keyboard from a thread other than the graphics thread?

I'm loving LWJGL, but have been running into a number of odd problems with it. Most of it seems to deal with the fact that OpenGL is a state-machine and was only ever meant to be accessed from a ...