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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With Slick, how to change the resolution during gameplay?

I am developing a tile-based strategy game using Java and the Slick API. So far so good, but I've come to a standstill on my options menu. I have plans for the user to be able to change the ...
3
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3answers
5k views

How to render axometric/isometric tiles that are a 2d array in logic, but inclined 45º visually?

I am making a tile-based strategy game which i plan to have 2.5D visuals in an axometric/isometric fashion. Right now i'm programming it's logic and rendering it as a literal 2-dimensional array ...
4
votes
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 ...
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1answer
1k views

How to implement HUD

I'm wondering how one could implement an HUD in LWJGL. I've seen tutorials on this, but they don't seem to work. I know the basic structure goes like this: init3d(); // 3d code init2d(); // HUD To ...
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1answer
291 views

Slick2D drawString with coordinates from bottom-left corner

For OpenGL text drawing I use Slick2D library. Default Slick2D 0:0 coordinates are at upper-left corner. But in my project I use bottom-left corner for 0:0. Is it real to configure Slick2D with ...
-1
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1answer
502 views

First person camera is somehow “magically” expanding

I'm making a first-person game, and I've gotten the camera done (modified version of Lloyd Goodall's code), but whenever I scale an object, it doesn't appear bigger, but the speed of movement seems to ...
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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 ...
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2answers
993 views

GL11.glTexCoord2f(1.0f, 1.0f); 1.0f screws the image up

I recently started using LWJGL in my java programs for the graphics. I'm currently working on a simple game, which I make, to get better at this kind of programming. I ran into some trouble when ...
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2answers
580 views

An odd performance problem rendering a simple scene (less than 14k vertices) in OpenGL using two vbos with LWJGL

Problem I have been having a strange degrading performance issue rendering a simple scene containing two "chunks" of 4x4x4 cubes each. Video of problem This is a screen capture showing my console ...
0
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1answer
162 views

How should I detect whether or not to enable Anti-Aliasing?

How can I detect the speed of the user's graphics card so that I can decide whether or not to enable advanced graphics features that would slow down the app on a slow card, such as anti-aliasing? I am ...
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0answers
56 views

OpenGL 2D Depth Perception [duplicate]

Possible Duplicate: 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 ...
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3answers
764 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 ...
3
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1answer
2k views

Can't get LWJGL lighting to work

I'm trying to enable lighting in lwjgl according to the method described by NeHe and this post. However, no matter what I try, all faces of my shapes always receive the same amount of light, or, in ...
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2answers
587 views

LWJGL in Visual Studio (possible)?

I switched from XNA and C# to LWJGL and Java about 14 months ago. Inherently, this called for a switch in IDE. I started using eclipse because I have also done some basic Android development in the ...
4
votes
1answer
2k views

Distributing cross-platform .jar containing natives for LWJGL?

I'm making a game in Java using Slick2d, which depends on LWJGL. I can get everything to work in my development environment, but when I export it to a .jar, it needs the natives placed in the same ...
2
votes
1answer
348 views

Update single entry in GLSL array

I have an array in my vertex shader like this: uniform mat4 MeshTransforms[20]; At the moment I'm just updating the entire array of matrices like so: int meshTransforms = ...
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vote
2answers
185 views

Controlling access to my game

I'm getting near the point where I'm going to be ready to release an alpha of my game. I'm curious as to how to implement a system where the game is un-launchable if a user name and password haven't ...
2
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6answers
2k 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()){ ...
9
votes
5answers
670 views

Increasing the probability for similar tiles to generate next to each other

I'm working on a tile map system, which insofar looks like this (green is grass, air is white, stone is grey, and blue is water): It uses a simple random number generator so that there's a 45% ...
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2answers
672 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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2answers
706 views

Collision Problems in Pacman Clone

I am working on a Pacman clone. I am using Java for the project. I have been having problems with collisions, and allowing the player to pass through objects. Note that the tile size (and player) is ...
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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)) { ...
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2answers
439 views

Pong - Changing the Ball's Y location depending on where it hits the paddle

I'm making my first game in, Pong, and I'm trying to make the ball's Y increase or decrease, depending on where it impacts the paddle. After implementing the code below, the ball only goes down, but ...
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2answers
2k views

Resource not found: testdata/alphamap.png

I started a tutorial for java's slick 2d library, called SlickBlocks which is essentally a tetris clone. The problem is I have followed and typed in the code examples to the dot, yet when I run it I ...
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2answers
926 views

How are dynamic blending shadows like this created?

I would like to know, how dynamic shadows, that 'blend' onto other objects, are created.
5
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5answers
3k views

Is there a cross-platform special directory I can use for game save files?

I'm developing with LWJGL and Java on a Windows 7 laptop. I've successfully set up saving to the %appdata%\gamename\saves\ or long form c:\users\user\appdata\roaming\gamename\saves\ folder by using ...
3
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1answer
374 views

How do I call glVertexPointer in Java?

I'm trying to convert the following code to Java: glVertexPointer( 3, GL_FLOAT, 0, &(mesh.m_PositionBuffer[0]) ); Where mesh::mPositionBuffer is std::vector<glm::vec3>; How would I make ...
2
votes
1answer
958 views

How do I get the alpha level at a specific pixel with Slick 2D?

I know that there is the Texture.getTextureData() method, and that it returns a byte[], but I have no idea how I could use this data to find the color data at a specific pixel.
4
votes
3answers
2k views

Suggest a simple Java math library for matrix operations for use with OpenGL (lwjgl) [closed]

I'm writing an OpenGL app with Java. I need to do some math for camera and frustum culling (for AABB). Could you suggest a simple and fast Java math library for that?
4
votes
2answers
5k views

Texture antialiasing?

In my Minecraft-clone style game, blocks are textured with a border that is lighter then the block color. See picture below: To achieve this effect without the textures being blurry I use this ...
2
votes
3answers
3k views

3D picking lwjgl

I have written some code to preform 3D picking that for some reason dosn't work entirely correct! (Im using LWJGL just so you know.) I posted this at stackoverflow at first but after researching some ...
1
vote
1answer
335 views

How do I determine if a tile is a slope based on the tile image?

In my game, every tile is a 32x32 texture. All the slopes are a 0 - 45 degree angle. I would like to determine, at the time I load the tile, if the is sloped by examining its texture/bitmap data. How ...
2
votes
1answer
830 views

Need some help implementing VBO's with Frustum Culling

i'm currently developing my first 3D game for a school project, the game world is completely inspired by minecraft (world completely made out of cubes). I'm currently seeking to improve the ...
4
votes
3answers
1k views

How can I change this isometric engine to make it so that you could distinguish between blocks that are on different planes?

I have been working on an isometric minecraft-esque game engine for a strategy game I plan on making. As you can see, it really needs some sort of shading. It is difficult to distinguish between ...
8
votes
2answers
604 views

What is the primary use of Vertex Buffer Objects?

From what I've read, it seems VBOs are purely for performance. I'm working on a very rudimentary learning project in lwjgl and I'm just trying to figure out what more advanced features of the library ...
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1answer
267 views

Frame Buffer Objects vs calling TexCoord2f?

I'm learning the basics of OpenGL with lwjgl currently, and following a guide I've got textured quads that can move around a scene. I've been reading about Frame Buffer Objects, and I'm not really ...
5
votes
2answers
367 views

How does this snippet of code create a ray direction vector?

In the Minecraft source code, this code is used to create a direction vector for a ray from pitch and yaw:' float f1 = MathHelper.cos(-rotationYaw * 0.01745329F - 3.141593F); float f3 = ...
3
votes
1answer
911 views

Ray picking - get direction from pitch and yaw

I am attempting to cast a ray from the center of the screen and check for collisions with objects. When rendering, I use these calls to set up the camera: GL11.glRotated(mPitch, 1, 0, 0); ...
11
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3answers
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How can I make OpenGL textures scale without becoming blurry?

I'm using OpenGL through LWJGL. I have a 16x16 textured quad rendering at 16x16. When I change it's scale amount, the quad grows, then becomes blurrier as it gets larger. How can I make it scale ...
0
votes
3answers
7k views

Packaging Jar with External Libraries in Eclipse

I have a class called Game in the package net.aGameName and am trying to export a runnable Jar using eclipse. In the project I have two external Jar files added, lwjgl.jar and lwjgl_util.jar. When I ...
12
votes
1answer
10k views

Making a HUD/GUI with OpenGL (LWJGL)

I'm at the stage in my game development where I need to make a HUD or GUI. I've never gotten to this part, so I don't know how its done. I tried rendering a simple quad at a fixed position on the ...
4
votes
1answer
304 views

Restricting Camera Movements with OpenGL

I've been programming a game using the Java library LWJGL. I've got a little problem, though. It is a 2D game, and I'm aiming for a game like the original Civilization (I quick Google of "Civilization ...
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votes
3answers
3k views

Rendering only what is on the screen

I am fairly new to this world, so bear with me. I have a grid of blocks in a top-down, 2d game written using Slick. The best way to think of it is the Pokemon world. Right now, I am rendering all ...
1
vote
1answer
835 views

LWJGL Rendering a 2D Object at a Certain Position On-Screen

Okay, so in LWJGL, how can I render a 2D object (maybe for like a menu, or meter that shows up on screen during the game), and have control over size and position on screen? So I can tell it what ...
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votes
1answer
441 views

vector collision on polygon in 3d space detection/testing?

In the 3d fps in java I'm working on, I need a bullet to be fired and to tell if it hit someone. All visual objects in the game are defined through OpenGL, so the object it can be colliding with can ...
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3answers
4k views

LWJGL glRotatef() without rotating axes?

Okay so, I noticed when you rotate around an axis, say you do this: glRotatef(90.0f, 1.0f, 0.0f, 0.0f); That will rotate things 90 degrees around the x-axis. However, it also sort of rotates the y ...
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votes
2answers
1k views

No LWJGL in java.library.path

Okay, so I know I need to set the path to the native files. I can do this in Eclipse, by going to the VM arguments and using -Djava.library.path=, but when I export, it says that the VM arguments ...
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2answers
1k views

LWJGL Determining whether or not a polygon is on-screen

Not sure whether this is an LWJGL or math question. I want to check whether a shape is on-screen, so that I don't have to render it if it isn't. First of all, is there any simple way to do this that I ...
7
votes
2answers
1k views

What causes some computers to have no or slow OpenGL, and how to fix it?

I am using Java with JOGL to create OpenGL enhanced 2D graphics. The graphics operations I use are nothing fancy, and should be supported by almost any recent graphics card. For example, my game ...
4
votes
2answers
5k views

Starting Java 2D Platformer using LWJGL [closed]

Getting started on a 2d platforming project in java. I've decided on using LWJGL and OpenGL, but I don't quite know where to start. What is typically the first thing one would work on with a ...