let ring1 = []

let ring2 = []

let ring3 = []

let spheres = []

​

function plant(x, y, z, radius, s) {

  let v = createVector(x, y, z).mult(radius)

  rotateY(ang)

  translate(v.x, v.y, v.z)

  sphere(s)

  translate(-v.x, -v.y, -v.z)

  rotateY(-ang)

}

​

function circle_div(n) {

  let ang = 2*PI/n

  let x = cos(random(ang))

  let y = sin(random(ang))

  let v = createVector(x, y)

  let points = [{x: x, y: 0, z: y}]

  while(--n > 0) {

    v.rotate(ang)

    points.push({x: v.x, y: random(-0.03, 0.03), z: v.y})

  }

  return points

}

​

function populate() {

  ring1 = circle_div(50)

  ring2 = circle_div(40)

  ring3 = circle_div(30)

}

​

function setup() {

  createCanvas(600, 400, WEBGL);

  noStroke()

  camera( -width/2, 30, -width, 

          -width/2,  0,    0, 

                 1,  3,    0 )

  for(let s = 0; s < 50*40*30; ++s) {

    spheres[s] = { d: random(2,10), c: random() }

  }

  populate()

}

​

function draw() {

  background(0);

  ambientMaterial(255)

  ambientLight(20)

  directionalLight(255,255,255, 1, 0, 0.5)

  let i = 0

  for(d of ring1) {

    plant(d.x, d.y, d.z, width, spheres[i].d)

    ++i

  }

  for(d of ring2) {

    plant(d.x, d.y, d.z, 0.9*width, spheres[i].d)

    ++i

  }

  for(d of ring3) {

    plant(d.x, d.y, d.z, 0.8*width, spheres[i].d)

    ++i

  }

  ang = ang - 0.001

}

​

​

​

​

​