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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3
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1answer
144 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 ...
2
votes
1answer
149 views

How can I optimize block rendering in an OpenGL game?

I am working on a game with blocky graphics -- similar to Minecraft. My world generation algorithm is similar to the Diamond-Square algorithm. The terrain was initially too rough and uneven, so I ...
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0answers
69 views

Framebuffer texture shows as blank white when rendered after TrueTypeFont

I have a working framebuffer class. However, when I render out the framebuffer after rendering text with Slick2D's true type font class, it is completely white. Below is all of the classes that are ...
1
vote
1answer
33 views

How can I move the camera directly under a certain plane?

I am attempting to render a "reflection" of a scene for water: To create this illusion, I need to render the scene from below, and then ignore all geometry below the water line. As such, I need ...
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0answers
17 views

LWJGL Applet Security Exception

I created small game in Java using LWJGL 2.9.3 and would like to add it to webpage as Java applet. I have followed this tutorial and have used this app loader. All the Java code works and I can tun ...
0
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1answer
70 views

Strange Rotation in LWJGL

What I am trying to do is to create a Rubik's Cube game using LWJGL in Java. I have a lot of it done already, the only problem is the rotating. It just isn't working. I've tried multiple ways of ...
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vote
2answers
76 views

opengl z index changing does not zoom in

I am making a simple opengl application where I have a cube and I want to move forward to it with the glTranslate3d function, where I change the z index. One would expect the object to get bigger ...
1
vote
1answer
123 views

How can I make terrain texturing look detailed both close-up and far away?

I attempting to make my game have very detailed textures, and in general look pretty. However, I'm having some issues with that. Let's take a look at a rock texture close up: Picture. As you can see,...
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0answers
90 views

Is it possible to use OpenCL in libgdx?

Been looking for a way to implement some OpenCL stuff in my libgdx project. It's possible via LWJGL which libgdx is based on, but it's only for the Desktop environment. Would like to have it cross ...
1
vote
1answer
78 views

Java heart based health mechanic

so I've made a basic game in java w/ LWJGL 2 and Slick. Right now Im working on the hud and health system. I'm kindof trying to get a minecraft like health system, 15 hearts for health,but I want the ...
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0answers
56 views

OpenGL model rendering issue

Currently my game will not display models properly on my PC but they load right on a pc that supports openGL 3.0, and as my laptop only supports 2.1 the last model rendered will show properly but the ...
1
vote
1answer
249 views

How to fix texture edge artefacts?

This issue has been annoying me for a long time now and even after reading a lot of articles about it, I am still unable to fix the issue. First, to my setup. I'm using LWJGL for a 2D project, ...
3
votes
1answer
69 views

GLSL uniforms are returning -1, but they are being used in output

I have looked this up, and found some answers and people said that if uniforms aren't important to the final output than they get thrown away by the compiler. However, in my case they are being used ...
2
votes
1answer
132 views

Java LWJGL Windows 10 native files

Hello I made a simple game and I want to share it to my friend but he cant run it. I'm assuming it's because he has windows 10 and the LWJGL 2 native files don't support that (I've asumed that based ...
1
vote
1answer
71 views

Java game LWJGL input doesnt work properly

Im making a game in LWJGL 2 and Slick2d. Im trying to add an item to my inventory by releasing a key (the inventory system works properly, the part where I have to see if the button was RELEASED is ...
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0answers
75 views

How do I pack my game LWJGL game into a single executable JAR with Maven?

I am trying to use Maven to manage building my LWJGL projects. The entire project needs to be packed into a single executable jar, dependencies, natives and resources included, so that can be easily ...
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vote
1answer
112 views

Java LWJGL inventory using ArrayList

I'm making a game in Java with LWJGL 2.9.3 and Slick2D, and I'm working on creating an inventory. I managed to set it up almost completely, but I ran into a problem. When I'm rendering the slots, only ...
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0answers
41 views

lwjgl Move 2D projectile in direction from coordinate pair

So I am having issues getting my projectile to move properly at all, the help I have found have only made this worse and have not actually given any heading as to what I am doing wrong. Can anyone ...
1
vote
1answer
45 views

Java delaying commands in a method with time (Sys.getTime)

LWJGL 2.9.3 and Slick2D Hello, so Im making this game and its going quite well, but I cant figure this out: Ive got a 2d tile based map (wich is stored in a 2d array) and each tile has a coresponding ...
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vote
2answers
148 views

Getting the tile over wich the mouse cursor is

Im making a tilebased game, I have the rendering, the main engine, everything setup nicely (btw Im using LWJGL and Slick). Now this is more of a math question. How do I get the tile the mouse is on, ...
3
votes
2answers
134 views

Algorithm for triangle picking?

So i found out that i need a triangle picking algorithm, i need to see if my mouse is over the triangle. I've heard what color picking is, but it would pretty much just drop the performance twice (...
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2answers
162 views

Random white lines appearing while translating rendering slick 2d images

Hmm I'm getting this weird problem that i think may be a bug with slick but when ever i translate an image in slick 2d for some reason a weird white line appears on the left side of every image like ...
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0answers
41 views

Java LWJGL and Slick2D collision with 2d array based map

So I've been making this game recently in java w/ LWJGL (2) and Slick2d. I've done some stuff like the map; it's a simple 2d array it goes through it and based on what id it is its gonna draw that ...
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0answers
103 views

How to get set up with java, eclipse, and slick 2d?

I have some experience in Java and other languages. I want to make games in java, and through my digging around it seems the LWJGL library is the way to go. I am trying to use Slick2D (http://slick....
0
votes
1answer
173 views

deformable terrain

I'm currently working on a 3d sandbox mmo and would like to know what would be the best way to store the terrain of the world. I was thinking about making some kind of mesh, like the kind you would ...
3
votes
3answers
401 views

Fastest 3D bounding box algorithm

I am at the point in my game where I need to add a collision system. I tried jBullet, and while it did work, it wasn't what I was looking for. I just want a simple way to test if two oriented bounding ...
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0answers
69 views

Converting glsl shaders

I need to convert these shaders from #version 400 core to #version 130 successfully but for some reason when I do it my models are not rendering properly when I load more then one type and I cant find ...
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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 ...
0
votes
1answer
41 views

Modify Element of Struct Array

I have this struct array in GLSL. struct Test { vec2 value1; vec3 value2; float value3; } uniform Test u_test[5]; How can I modify the elements of this array one at a time? I know that ...
0
votes
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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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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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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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 ...
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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 ...
1
vote
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
votes
2answers
428 views

Setting Window Icon Using GLFW (LWJGL 3)

What's the best, cross platform, way of setting the window icon using LWJGL 3? I have a PNG image and would like to set it to the icon present in my dock (OS X) or the application bar (Linux).
1
vote
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) { ...
0
votes
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, ...
0
votes
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. ...
1
vote
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 ...
0
votes
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 ...
0
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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), ...
0
votes
1answer
319 views

How do I render a PNG image with OpenGL?

I have an image (100×200 px) painted with Paint.NET and saved as a .png with 32-bit color depth. How can I render it using OpenGL 1.1 (with the LWJGL binding) or higher inside the display? I tried ...
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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 ...