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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1answer
178 views

Optimization with VBOs [closed]

I am currently working on a cube engine and am experiencing some issues with CPU optimization. I store all my quad VBO data inside a Block (at x,y,z of a chunk) class, which is stored inside an array ...
0
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1answer
200 views

Textures not rendering with VBOs

After having used display lists for my programs since I started learning OpenGL, I've finally decided to switch to VBOs after experiencing a considerable amount of lag when I started work on a new ...
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0answers
586 views

Weapon Class Organization [closed]

Im making a game and i want to organise my weapons, and im having a few doubts on not only the best architecture but also on how to use it properly: The First approach is to make a single Weapon ...
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0answers
135 views

Why must VBOs be “broken in?”

If I create a VBO in LWJGL of, say, 128,000 vertices, and push it to the graphics card, there's a considerable delay. This delay lasts for about 11 to 12 milliseconds. The same thing happens the ...
-1
votes
1answer
307 views

Game Engine Design for the LWJGL [closed]

I'm about to begin on the engine for the game I am making. However, I am quite uncertain how I should design it. I have heard lots about threaded games, component and asynchronous systems. I'm ...
2
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1answer
52 views

What measurement units are used in the return value of the getWidth method in the UnicodeFont class supplied by Slick2D?

I'm working on a small component for a game that essentially wraps the provided String so that it fits within the width of the provided rectangle. The rectangle is provided by the Slick2D library as ...
2
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0answers
254 views

VBO = glGenBuffers() IllegalStateException [closed]

i'm kinda noob in OpenGL but I have this problem: I get an IllegalStateException at this code: int vboVertex = glGenBuffers(); In-detail exception: Exception in thread "main" ...
0
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5answers
455 views

Limiting a player's movement to the screen's dimensions

I have a player, that I can control using WASD. And I don't want him to leave the screen. So I've tried the following: if (player1.getX()+5 < 974 && player1.getX()-5 > 0) { ...
1
vote
0answers
261 views

Exporting from eclipse with lwjgl using jarsplice

I am in the process of developing a 2D tilebased rpg with eclipse, lwjgl, and slick util. For some reason eclipse seems to be lagging heavily which doesnt make sense as all i have rendering is a ...
4
votes
1answer
2k views

How do I draw a full resolution texture to a window of the same resolution?

My image is 1280x800, and my screen size is 1280x800. It should draw perfectly. I'm creating a quad the size of the screen, and setting the texture to fit the quad. But right now it draws a square ...
0
votes
1answer
291 views

Map handling - Indoors/Outdoors and loading large maps

I have two questions regarding the handling of maps. Question 1. My map will consist of outdoor enviroments as well as dungeons, houses etc. How would I go on about connecting the outdoors with the ...
1
vote
1answer
303 views

LWJGL Wait for key press in a single method

Currently I am implementing the possibility in my game to change the keyboard configuration. Therefor, I have a menu in which is a button for each action the player can do. If the player clicks on one ...
2
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1answer
610 views

jMonkeyEngine Pros and Cons

I want to know some good reasons to use jMonkeyEngine for a Java 3d game development tool instead of just creating a game with LWJGL myself? I want to know a good reason I should choose this tool. ...
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vote
2answers
221 views

Map logical coordinates to graphical for walking

I'm having a problem with mapping logical coordinates to graphical ones when my character is walking. I've been able to map them without the graphical walking in between, i.e it just "jumps" from one ...
1
vote
1answer
150 views

(Java + Slick) How to rotate the Graphics (g) around the X-Axis?

I already tried it by using GL11.glRotatef(45, 1, 0, 0), but the result looks like this:
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vote
2answers
275 views

LWJGL - If I use VBOs what can I do about separate textures?

So basically this is my problem: I am creating a game that needs a texture for each object. Now I would use a sprite sheet but the textures are different sizes. I am using VBOs and I need to some how ...
-2
votes
3answers
1k views

LWJGL vs Slick2D vs OpenGL. What is the difference?

I was wondering what the difference was between LWJGL, Slick2D, and OpenGL. If I'm not mistaken LWJGL is a library and it has the methods and such, but what are the other two for and how do they use ...
3
votes
1answer
233 views

Minimizing amount of comparisons for collisions?

In my 'Terraria' based game I am having lag issues. The cause of the lag is as follows: Every update loop through all the tiles in the world: If the rectangle that was passed as an arg intersects ...
1
vote
1answer
149 views

AI and rendering to screen

I'm using LWJGL, however I'm a bit confused on what to do. I'm trying to write an AI simulation, however I'm stuck at this problem. I have one camera, and I plan to move the camera to the mob ...
3
votes
1answer
372 views

Odd blending result (semi-transparent 2d quad over 3D scene)

I'm working on a GUI library for my game, and I'm having problems with my blending. I have a 3D scene, which I render with glDrawArrays. In the fragment shader the alpha color is hardcoded 1.0f ...
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0answers
258 views

Why do my LWJGL fonts have dots and lines around them?

When we render fonts there are weird dots and lines around the text. I have no idea why this would happen. Here is an image of what it looks like: Our font class looks like this: package ...
1
vote
1answer
3k views

Rotation of images in Slick2D

I have have a rotation problem in the Slick2d library, the image is just not rotating (ie I set a rotation but no result is shown). Here is the rotation code: if (input.IsKeyDown(Input.KEY_LEFT)) { ...
1
vote
1answer
642 views

Quaternions, Axis Angles and Rotation Matrices. Which of these should I use for FP Camera?

After 2 weeks of reading many math formulas and such I know what is a Quaternion, an Axis Angles and Matrices. I have made my own math libary (Java) to use on my game (LWJGL). But I'm really confused ...
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1answer
52 views

Can LWJGL support multiple displays

Can LWJGL support multiple displays either as separated windows or as part of an AWT Window?
2
votes
1answer
1k views

How to modify VBO data

I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map ...
1
vote
1answer
322 views

Packing jar files into library jar files

Firstly, this question is not about packing a simple jar file (e.g. lwjgl) into a runnable jar file. I know how to do this using JarSplice. So if I have a game which uses JInput, I will pack my game ...
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votes
1answer
203 views

Multithreading in lwjgl getting rid of sleep.

I'm trying to use multithreading in my game. However, I can't seem to get rid of the sleep. If I don't it's a blank screen, as there is no time for the computer to actually render the triangleMob as ...
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vote
2answers
3k views

LWJGL Text Rendering

Currently in my project I am using LWJGL and the Slick2D library to render text onto the screen. Here is a more specific example: Font f = new Font("Times New Roman",Font.BOLD,18); font = new ...
2
votes
1answer
271 views

GLSL Multiple Uniform Structs

I'm developing a lighting system for my voxel game, and I have to send multiple (alot, say up to 200) lights to my shader program. Those lights contain the following data: Position (vec3) Color ...
2
votes
1answer
163 views

Manual GLU.gluUnproject

Before I used GLU.gluUnproject to calculate my picking ray in my OpenGL game. Recently I switched to my own calculated matrices, and now I can forget the gluUnproject. How can I calculate the picking ...
1
vote
1answer
968 views

How to use JBullet in LWJGL? [closed]

I have got a problem, because I wan't to add collision detection to my 3d game, which I am developing in Java, using the Lightweight Java Game Library (LWJGL). I have googled a bit, and I have found ...
0
votes
1answer
1k views

How can I implement infinite scrolling by scrolling the background's texture, not the quad? [duplicate]

I'm writing a 2D platformer game on Java with LWJGL. I'm doing this just for the sake of learning and not the result itself, so when I decided to implement scrolling I did it two ways I could invent ...
2
votes
1answer
176 views

OpenGL Calculate Matrices

Im trying to switch from the glTranslate etc to my own Matrices, but for some reason it does not work. Here are my 2 functions to create the view- and projection matrix: public Matrix4f ...
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2answers
1k views

Screen or World Coordinates to tile Coordinates

I have Plane made of tiles in opengl. I start drawing them at (0, 0, -20) after that i do my translations so that the view is rotated somewhat similar to an isometric (kind of) perspective. I'd now ...
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votes
2answers
1k views

Terrain Generation - Advanced [closed]

I need to generate terrain. Easy enough you might say, but I need to create Biomes if you will(Can't link of another name) lakes. Trees and on a height map. So I have really no idea how to use a ...
-1
votes
1answer
461 views

Slick2D and TileD [closed]

I've been learning Java for a while, and with my aims of being a game developer later in life, I've came across Slick2D+lwjgl and following tutorials and making some little things. However; I don't ...
-1
votes
1answer
320 views

How compatible is OpenAL?

I'm making a game that needs sounds and LWJGL uses OpenAL. I was wondering out of 1.0, 1.1, C 1.0 and C 1.1 which would be the best to pick? I don't know what the C is but it's there in LWJGL :). My ...
0
votes
1answer
232 views

Would it be inefficient to call LWJGL from C++?

I like LWJGL, but Java? Not so much. I recently found out a way to call Java methods from C++. But would this be inefficient? I mean, calling a C/C++ DLL from Java, just to be called back again into ...
1
vote
1answer
746 views

Can't get Depth testing to work (cube faces shine through)

I'm making my first steps with OpenGL with LWJGL. I am currenlty constructing a... wait for it... CUBE. Quite creative... Up to now i made it to three of its faces and thats where the Problems began. ...
1
vote
1answer
1k views

Drawing in 3D with LibGDX

Is there any way to simply draw in 3D, just like you would draw with ShapeRenderer or SpriteBatch? All I want is to draw circles that are in x.y.z coordinates, so some circles are far away from view ...
1
vote
1answer
433 views

Detecting collision with a 3D array of boxes

I am at the stage of my development process where I want to implement collision. Now I can think of a simple way of doing it, if the camera's x, y or z are inside the position of a certain cube then ...
2
votes
2answers
2k views

OBJ model loaded in LWJGL has a black area with no texture

I have a problem with loading an .obj file in LWJGL and its textures. The object is a tree(it's a paid model from TurboSquid, so I can't post it here,but here's the link if you want to see how it ...
-1
votes
1answer
387 views

Generating a grid of cubes in 3D space [closed]

I am trying to generate a grid of cubes in 3D space and It aint workin... All im doing is for looping YXZ (in that order) (nested for loops) then im doing cubes[x][y][z] = ... (new Location(x,y,z)) ...
2
votes
1answer
352 views

MVC with looping view

For our school project we'd like to develop a game using the MVC pattern. We're all moderate new java programmers and absolutely new in game development. With our current view (containing only menu) ...
-5
votes
1answer
182 views

Writing and reading from an XML file with Slick2D [closed]

I was wondering how you would go about writing and the reading from an XML file using the Java library Slick2D. I have googled for the last couple of days and have found nothing succinct and simple ...
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votes
1answer
186 views

Entity moving Up and Down but not Left and Right [closed]

I am trying to create an entity class for my game but I'm having difficulty with the movement, I can get the sprite moving along the Y-Axis but not along the X-Axis. Here's my code:- package Game; ...
4
votes
4answers
510 views

Storing data for a pokemon like game

The game I'm developing is close to Pokemon. How should I store the data? I am currently thinking of text files where I save the map and have a corresponding textfile for the trainers and their teams ...
5
votes
5answers
1k views

How to get more than one window in Java LWJGL

I'm trying to write a game in Java LWJGL. And I need more than one (multiple) display window. By default I've got one display window where I can draw everything. But I'd like to split some data to ...
0
votes
1answer
277 views

Sidescrolling troubles [closed]

I'm making a sidescroller using java and Lwjgl. But I'm having some trouble getting the screen to actually ... well... sidescroll. The world is randomly generated and drawn in blocks. Like so: ...
3
votes
1answer
296 views

Rendering a black and white image in OpenGL 1.1

Is there is any way that I can simple disable the color in OpenGL 1.1? Or can I "grey out" textures in LWJGL?