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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opengl camera scrolling too fast

Im using the code from this tutorial but in java and lwjgl http://lazyfoo.net/tutorials/OpenGL/04_scrolling_and_the_matrix_stack/index.php . The problem is i want the player to click and drag around ...
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1answer
41 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, ...
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43 views

Drawing fonts with LWJGL3 with OpenGL

I'm very sorry if this question has already been answered, but since I've been struggling with this for many days I thought I'd give it a shot here. My goal is to somehow render some text on the ...
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17 views

JBullet - Object is colliding at the wrong location!

I'm trying to make archers walk on my ship. I create the ship mesh like this: { Model mesh = null; try { mesh = OBJLoader.loadModel(new File("res/ship.obj")); } ...
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1answer
32 views

AABBs in lwjgl 2.9.3

I think I have succeeded in making an aabb out of 6 quads in opengGL but how would i get it to stay with its centre-point at the centre-point of all objects. I know it is easy for one object how would ...
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1answer
64 views

Rotating a swinging sword in LWJGL gives wierd results

I'm making a 2d top down game in Java using LWJGL(OpenGL, essentially). I recently tried adding a swinging sword mechanism. My coordinate system is set to the bottom left FOR ALL objects. The rotation ...
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2answers
64 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 ...
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18 views

LWJGL Using .setIntialBackground and Drawing Textures?

I have been trying to create a game with LWJGL, however I have recently discovered that changing the background color using Display.setInitialBackground() with glClear and trying to draw a texture at ...
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25 views

JBullet - Two RigidBodies will not collide

I am adding two ships into my collision world. (The green dots are the collision shape (an ObjectArrayList) that I am passing to the ConvexHullShape) However they don't seem to collide. In fact, ...
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1answer
39 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" ...
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47 views

Hard time implementing AABB collision into a platformer

I have AABB collision working fine. The problem is I can't get it to work with a platformer style game. The collision makes the player move a bit static when colliding and the gravity wont work with ...
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1answer
30 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 ...
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27 views

Opengl camera handling

I normally do parallax scrolling with x and y which works, but I'd like to make a camera class instead so I can rotate as well. Right now the camera is set to the player's position but doesn't scroll. ...
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56 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() ...
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1answer
40 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
36 views

Scrolling is going too fast

I used delta based off the LWJGL tutorials and it works (I get 16 or 17 delta) but everything is scrolling nonstop. Here's how I render things: public class Game { int camX; int camY; ...
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58 views

Trouble with Raycast Selection using OpenGL

I am currently having trouble with a custom model editor in which I want to implement model selection (eventually featuring face selection to have something like "click-and-drag" to extend the cubes). ...
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1answer
81 views

What is the difference between .obj files and Collada files? [closed]

I am currently making a game in java using LWJGL 2.9 and I am wondering what the difference between the .obj format and .dae format is. Currently I can load .obj files and would like to load .dae ...
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14 views

Stack matrix affecting shooting mechanics

I attempted to make a scroller game using parallax scrolling in LWJGL. Everything is fine but I'm having trouble with the matrix stack and the bullets. So basically when I shoot the bullet it moves ...
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1answer
62 views

How can I split up a large model into an octree codewise?

For collision detection, I am attempting to split up a large model into an octree. If we take this black thing thing to be the ship (104,000 vertices): Then I would like to split up the faces I ...
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24 views

LWJGL: getDisplayModes() on Linux with two monitors

When calling getDisplayModes() on a Linux machine with two monitors I only get one single resolution, that is, the current resolution set on the main monitor. However, calling xrandr directly gives me ...
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2answers
274 views

How does glRotate affect the axes of the global coordinate system?

I am currently playing around with 3D transformations applied on a 2D context in LWJGL, to later be implemented in my game. So I managed to set up LWJGL well enough (scaling, translating, scaling and ...
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1answer
35 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 ...
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1answer
72 views

How to distort graphics in a wave-like way?

I saw a certain graphics distortion effect on multiple games over time and am interested in doing it in 2D. It is like a wave-like texture distortion, I am not entirely sure what it is called ...
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1answer
108 views

FBO and VBO for performance

I discovered VBO's recently and changed my code to use them instead of immediate mode. Now I'm rendering 25000 squares and it's really slowing down my FPS. If I drew all the squares VBO's to an FBO, ...
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1answer
76 views

OpenGL/GLSL/LWJGL return value from shader

I'm trying to do some bone animation. I don't want the whole skeleton to be loaded to the GLSL shader every time, even tough it's not needed, because one vertex is parented to one bone, not more. My ...
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12 views

How can I implement a “horizontal desynced colors” effect in LWJGL? [duplicate]

My plan is to achieve analog video effects like RGB channel desynchronisation. I'd like to have something like this (I hope you get the idea): Left: White dot; Right: The same dot, but mind the ...
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42 views

How to setup States in NIftyGUI and LWJGL

I think this is a simple question but I just cannot figure it out. I have a main menu that is using nifty gui and then my game which is rendered using OpenGL Code (LWJGL) I cannot figure out how to ...
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1answer
115 views

How can I get “Good enough” collision for entities? [closed]

I am developing a Pirate ship fighting game. It's a great concept: Ships firing cannonballs, sinking each other, having to work as a team to complete the mission... But.. I've tested it with about ...
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30 views

VBO - Update Vertex data

My game will be a 2D Sidescroller and I'm working on moving objects around. Since I want to animate and move my sprites around, how do I update the vertex data? This is my current class for GUI ...
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41 views

Lwjgl Textures Overriding true type font

I am making a game in java but I recently came across a problem when I bound my textures, my true type fonts would start copying the texture and i would just see a wall of color where my words had ...
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1answer
96 views

Java JBullet Mesh collsion problem

I have a problem with JBullet mesh collsion. Everything works fine when I create a mesh from my object without scaling, but the problem starts when I want to scale the object. I also tried scaling in ...
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1answer
112 views

Java LWJGL - How can I add water to my 3d world? [closed]

The title says it all, how can I implement a simplistic water system into my game? I am using Java LWJGL and OpenGL glsl shaders. I am still fairly new to game programming, and a complete noob in the ...
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1answer
91 views

Java LWJGL - Monster follow script not working properly

I have written a script to be set off whenever a player is within a distance of the monster. The script checks if the x position is greater than or less than the players x, and same for the z. (y is ...
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2answers
129 views

How does rendering with Swing compare to rendering with openGL?

[summary: Is the performance of Swing at least in the same dimension as openGL [through LWJGL]? If yes, what percentage would you give it? What possible other problems can I expect from Swing in the ...
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1answer
91 views

Java LWJGL - How can I click to interact with objects?

I want to be able to click on a monster to walk to him and start attacking him. The part that doesnt make sense to me is the conversion between the mouse position, and the actual terrain position. ...
2
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1answer
119 views

VBO -> How should it be done?

I'm very new to OpenGL/LWJGL. I'm reading a lot of VBOs. I'm sorry if I can't concretise my concern, but i'll try it: Why should I use VBOs? Whats the difference between using VBOs and glBegin() ...
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1answer
56 views

Edit VBO data or create a new one?

I have a question: if I have a VBO, and I have to change all the data inside it (because of resizing, ...), would it be more efficient to delete the old one and create a new one (and reallocate the ...
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2answers
434 views

Resizing a Framebuffer Object (ie: its attachments) on Screen Resize

I have been experimenting with some post-processing effects and I have been using FBOs to store stuff. The problem is, I attempt to resize them when I change resolution. I get no errors, however the ...
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1answer
37 views

Slick2D Graphics Misaligned

I'm working through a game in Slick2D and am now focusing on a lot of the graphical end. It's going pretty well other than a couple of issues with alignment. An image illustrating both of these issues ...
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2answers
51 views

How do find the right GLxx object for a given function in LWJGL?

I'm just starting to learn the fundamentals of OpenGL via LWJGL. Every OpenGL function is implemented as a method on a GLxx class. The xx corresponds to the version of the spec when that function was ...
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1answer
47 views

LWJGL Stencil shadow problem

I've a problem with shadow (Stencil). So when i draw the shadow they looks good, but when the object to draw is underground his shadow is wrongly rendered. My game is do with LWJGL/GL11. Normal ...
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2answers
103 views

How to setup glOrtho and Viewport [duplicate]

When setting up a window I set 6 variables in my render class int windowWidth; // the width of the window int windowHeight; //the height of the window int dimL; // the coordinate of ...
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1answer
97 views

Why would OpenGL ignore GL_DEPTH_TEST setting?

I cannot figure out why some of my objects are being rendered on top of each other. I have Depth testing on. glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); Do I need to draw by order of what is ...
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0answers
37 views

LWJGL 3 crashing on nglDrawArrays

I have 2 classes I'm trying to use to render a triangle, and it's crashing on nglDrawArrays, the error is in the native code, and the only information I'm getting from the JVM is a native error ...
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1answer
98 views

Why Is My AABB Collision Detection Not Working

I am going to be making a 3D game and I need to be able to test for accurate collision. I was able to get bounding sphere collision working (too inaccurate to be used for the whole game), but AABB ...
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3answers
434 views

Calculating Projectile Movement

I'm having some trouble putting together a method that will constantly move a "bullet" in the same direction accurately. Here is what I have so far public Vector3f moveFromPosition(Vector3f location, ...
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0answers
19 views

Projectile Motion in lwjgl with java [duplicate]

I was trying to make a game with a bow and arrow using lwjgl but I couldent get the arch right. I have a function called projectile that is updated once a frame for each arrow. my frame cap is at 60 ...
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2answers
371 views

How do I ensure my skybox is always in the background, with OpenGL?

I created a skybox in OpenGL (through LWJGL), but the only way I found to render it behind all objects was to make it very big. This leads to ugly edges between the 6 skybox planes. Optimally, I ...
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1answer
156 views

Fade into splash screen on game load

I'm using Slick2D and LWJGL for my StateBasedGame and I was wondering if there was a way to enter into my splashscreen on application load using a transition? I tried using: this.enterState(SPLASH, ...