Polar coordinates [3D-2D]

script.js

let GLOBE_RADIUS = width / 3; // Radius of the globe based on the canvas width
class Dot {
  constructor() {
    this.theta = Math.random() * 2 * Math.PI; // Random value between [0, 2Pi]
    this.phi = Math.acos((Math.random() * 2) - 1); // Random value between [0, Pi]
  }
  ...
}