• aspect ratio can be figured out like so:

const sizes = {
  width: 800,
  height: 600,
};
const aspectRatio = sizes.width / sizes.height;

• When tracking the mouse, we need to covert the pixel coordinates to normalises matrix grid. So that mouse tracking behaves consistently acorss screen sizes.

window.addEventListener("mousemove", (e) => {
  cursor.x = e.clientX / sizes.width - 0.5;
  cursor.y = e.clientY / sizes.height - 0.5;
  console.log("hey", cursor);
});

• it doesnt necessarily have to be 0.5