// https://thecodingtrain.com/

// https://youtu.be/Iaz9TqYWUmA

​

// Thanks to Veritasium

// https://youtu.be/zUyH3XhpLTo

// and Chris Orban / STEM Coding

// https://www.asc.ohio-state.edu/orban.14/stemcoding/blackhole.html

​

// Newtonian version:

// https://editor.p5js.org/codingtrain/sketches/2zZqSkxtj

​

const c = 30;

const G = 3.54;

const dt = 0.1;

​

let m87;

​

const particles = [];

let start, end;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  m87 = new Blackhole(width / 2, height / 2, 10000);

​

  start = height / 2;

  end = height / 2 - m87.rs * 2.6;

​

  for (let y = 0; y < start; y += 10) {

    particles.push(new Photon(width - 20, y));

  }

}

​

function draw() {

  background(255);

​

  stroke(0);

  strokeWeight(1);

  line(0, start, width, start);

  line(0, end, width, end);

​

  for (let p of particles) {

    m87.pull(p);

    p.update();

    p.show();

  }

  m87.show();

}