lwjgl3 | Java library that enables cross | Game Engine library

I am currently working on a project that involves rendering LWJGL game scenes to a video stream instead of a window. I believe I can achieve that if I render a game scene to an intermediate format, such as a ByteBuffer. I am trying to extend LWJGL VoxelGame demo as a proof of concept.

I have found a similar SO question and a forum post but I was not able to make that work. I am a beginner on OpenGL and LWJGL and I am struggling on finding comprehensible documentation on that.

On the start of the render loop (runUpdateAndRenderLoop) the function glBindFramebuffer is called. To my understanding it binds FBO to the current context so that any rendering will be directed to it.

I have tried using glGetTexImage and glReadPixels to populate a ByteBuffer but it didnt work. I have also tried that after glBlitFramebuffer since I want to get the full rendered image to the ByteBuffer.

How can I render the current game scene to a ByteBuffer? Is there a better way of going about rendering game scenes to a video stream instead of an intermediate ByteBuffer?

I'm following ThinMatrix's Opengl tutorial using LWJGL3. There's been lots of GL15 and GL30 in the code. What do they mean? Are these different opengl versions? And why do some of them contain fields that the other object does not have. Like GL15 has the .GL_ARRAY_BUFFER field yet GL30 does not despite seemingly coming after GL15.

The following data format:

I'm learning now LWJGL3, and I have a problem. I want to limit the frame rate of my window to 60 FPS, but I don't know how to do that in LWJGL3. In LWJGL2 which I used before I switched to LWJGL3 I call Display.sync(60); before calling Display.update();, but in LWJGL3 the Display class was replaced by window which controlled by the GLFW class. SO, which method replaced the Display.sync(int frame_rate); method?

I am creating a 3D game using LWJGL3, and I want the window loaded in the background and hidden, wait for my game setup and only than showing up. My problem is even if I call GLFW.glfwHideWindow(window) immidetly after GLFW.glfwCreateWindow(width, height, title, isFullscreen ? GLFW.glfwGetPrimaryMonitor() : 0, 0); the window flickering, than load the game and than showing up (when I want). How to prevent the window from flickering? Maybe I just change one of the arguments in GLFW.glfwCreateWindow?

My code: Window class:

I am trying to create a 3D engine using LWJGL3 and i keep getting this issue:

When rotating an object it does this:

The quad SHOULD be in the middle, as i didn't change the x coordinate, but it isn't. I actually tried to redo the transformation matrix using the old utilities jar from LWJGL2 and the quad rotated on its axis, not in some sort of orbit around the middle.(btw i am using the latest version of JOML)

When i searched on google about the issue i:

1. Could not understand anything.
2. The things that i understood wouldn't work (like updating JOML)

Here is the code that generates the transformation matrix:

I am just starting to learn LWJGL3, but fot some reason, the imports don't work. I tried 2 methods of installing LWJGL3, first time I followed a video tutorial, second time I installed it how the official installation guide told me to (Guide). All of the JARs that come with LWJGL3 are included in the JRE System Library. The error appears as soon as I try to utilise glfw.

Image of my workspace

Code:

After years of taking beginner courses in OpenGL and linear algebra courses, I recently finally understood the point of the Model, View and Projection Matrices. Basically the Model Matrix converts the vertex coordinates of an 3D model into vertex coordinates in a 3D world (translating, rotating and scaling the model relative to the origin of the 3D world). The View Matrix converts the vertex coordinates of the 3D world into vertex coordinates relative to a camera (usually only translation and rotation of the world relative to the camera) and the Projection Matrix is used to compute/convert the vertex coordinate in a Camera view into a projection on a 2D plane (usually the screen).

I'm trying to create a camera system in a 3D Projection on a 2D Plane without OpenGL but by using JOML which is a Java Math (Mostly Linear Algebra math) Library for OpenGL often used with the LightWeight Java Game Library 3. I am able to create a camera system in OpenGL, which is quite easy with the 3 aforementioned matrices. But when I use the same exact matrices (and some extra code so that the projection appears on the screen) I can only do the Projection on a 2D Plane. The Model Matrix and View Matrix don't seem to have any effect on the way the model is projected on the screen.

Here is the code I'm using to project a cube on the screen:

I have an issue with resizing my window on LWJGL3 and GLFW. I can resize the window, however what is rendered to it does not size with it, most likely a coordinate issue. I've listed my Display and Main classes.