cameratransform | python package which can be used to fit camera | Computer Vision library

I have an app that I am trying to update from SceneKit to RealityKit, and one of the features that I am having a hard time replicating in RealityKit is making an entity constantly look at the camera. In SceneKit, this was accomplished by adding the following billboard constraints to the node:

I am developing a game engine. Currently I am working on the camera system. When I translate it Time::getMainLoopDeltaTime() units to the right, everything in the scene moves to the right along with it when everything should look like it is moving left. I cannot figure out what I am doing wrong. These are the technologies that I am using:

• GLFW
• OpenGL
• GLM

Note: I am using the game object's transform as the camera's transformation matrix that also serves as the view matrix. The x position outputs positively increasing values and the game objects in the scene are stationary (their x y z position values are not changing).

Camera game object intialization

So I am trying to create a new first-person movement system with the new input system in order to make gamepad support so much easier and I am experiencing a problem when I try to read the value of the Vector2 in a FixedUpdate loop, it only outputs (0,0) but if I read it in an InputAction.performed event it works. However, I cannot use the event as it doesn't repeat on keyboard input and it isn't smooth. I've seen a tutorial linked here and at the end it does demonstrate you can pull information from outside events. Now my question is did I miss something or is there a different way to do it, my code is found below

I am working on a renderer, and I am having some troubles with the perspective projection matrix.

Following is my perspective projection matrix.

I stumbled upon this while applying rotation from the camera onto an entity in RealityKit. I thought I have to do some matrix math to gain the euler angles from arView.session.currentFrame.camera.transform matrix, but retrieving the rotation from arview.cameraTransform.rotation did the trick (found here).

So: What is the difference of both matrices and when should be used which?

I have a very simple RealityKit scene (without AR) with a box on it. While the sides of the box are colored (I assume due to a default light), the front face is black. So I decided to add a point light at camera's position (based on other StackOverflow answers, and same anchor than the box one), but the box remains black. What am I missing ?

I recently made the decision to switch over to a newer version of the JDK from the one I was using. (Specifically from jdk1.8.0_261 to jdk-14.0.2). This upgrade when pretty smoothly, as most features work the way I expected them and I was able to find how to adjust to anything that was not the same.

However, as shown in the title, I came across an issue with a specific application I am writing that uses Swing. My main monitor is a 4k monitor, and I have set the windows system scaling for that monitor to 200%. While every other Swing application being scaled to match that DPI setting is nice, for this specific application I want to disable that scaling and have pixels be drawn 1:1, especially when this Application is distributed.

Is there a way to disable this automatic scaling with a VM argument? Or is there a way to disable the scaling at runtime before any calls are made to the swing library? (Similar to how any changes to the look and feel must be done before any other calls to the library.)

For reference:

Here is the code I use to create my JFrame and to create the graphics object I draw everything onto, which happens in a timed loop outside of this class and the scope of this question.

I was following Apple Documentation and example project to load 3d Object using .SCN file with Virtual Object (subclass of SCNReferenceNode) class but suddenly i needed to change the model from .scn to usdz . Now my usdz object is loading successfully but it is not on surface (midway in the air) and i can't interact with it like (tap , pan , rotate) ... Is there any other way to get interaction with usdz object and how can I place it on the surface like I was doing it before with .scn file

For getting model URL (downloaded from server)

I've been trying to make the face texture in a 2D canvas/plane move only along the X/Y axis, following the movements of the face without rotating, with the 2D background camera texture reflected accurately on top. Right now, when I connect the canvas to the face tracker I'm getting distorted scale, and the 2D plane rotates in 3D space. See below for the current canvas/camera texture/face tracker set-up. Manual scaling results in poor tracking.

Here is my code: