const c = 30

const G = 7

let photons = []

let captiveRange

​

const dt = 0.1

​

function setup() {

  createCanvas(windowWidth,windowHeight - 50);

​

  m87 = new BlackHole(width / 2, height / 2, 5000)

  captiveRange = 12 * m87.radius

  // photons.push(new Photon(-5, height/2 + 5.55*m87.radius,c,0))

  // photons.push(new Photon(-5, height/2 - 5.55*m87.radius,c,0))

  let photonNum = 20

  let photonSpacing = 10

  for (i = 0; i <= photonNum; i++) {

    // if (i % 2 == 0) {

    photons.push(new Photon(- 5,height/2 - (i * photonSpacing),c,0,true))

    // } else {

    //   photons.push(new Photon(- 5,height/2 + (i * 2),c,0,false))

    // }

  }

  // for (i = 0; i <= 180; i++) {

  //   let xSpeed = cos(i) * c

  //   let ySpeed = sin(i) * c

  //   photons.push(new Photon(150,height/2 ,xSpeed,ySpeed))

  // }

  frameRate(60)

}

​

function draw() {

  background(255);

  m87.show()

​

  let photonsDone = 0

  for (let p of photons) {

    if (dist(m87.position.x,m87.position.y,p.position.x,p.position.y) < captiveRange){

    let force = m87.pull(p)

    }

    if ((((width / 2) - 0.5 * m87.radius < p.position.x) &&  (p.position.x < (width / 2) + 0.5 * m87.radius) && ((height / 2) - 0.5 * m87.radius < p.position.y) && (p.position.y< (height / 2) + 0.5 * m87.radius)) || (-250 > p.position.x) || (width + 250 < p.position.x) || (-250 > p.position.y) || (height + 250 < p.position.y)) {

     p.draw = false 

    }

    if (p.draw) {   

      p.update()

    } else {

     photonsDone += 1 

    }

    p.show()

  }

​

  if (photonsDone == photons.length) {

   resetSketch() 

  }

  m87.showEventHorizon()

}

​

function resetSketch() {

  photons.splice(0,photons.length)

  setup()

}