1801

/******************

Code by Vamoss

Original code link:

https://openprocessing.org/sketch/2400701

​

Author links:

http://vamoss.com.br

http://twitter.com/vamoss

http://github.com/vamoss

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​

var cometas = [];

var step = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  cometas.push(new Cometa(50, 0.7, true));

  cometas.push(new Cometa(50, PI+0.7, true));

  var total = 150;

  const PHI = (1 + sqrt(5))/2;  //golden ratio

  for(var i = 10; i < total; i++){

    var radius = sqrt(i * PHI) * 22;

    var angle = i * PHI * TAU;

    cometas.push(new Cometa(radius, angle));

  }

}

​

function draw() {

  background(255);

  noStroke();

  var time = frameCount / 30;

  var ease = (sin(sin(sin(time)*2)*2)+1)/2;

  step += 1.5 * ease;

  cometas.forEach((cometa, i) => {

    const r = (1+(cometas.length-i)*0.005);

    var angleMax = map(sqrt(i), 0, sqrt(cometas.length), PI/4, 0.1);

    if(cometa.special){

      angleMax *= 2.5;//no tail = 0.015

    }

    for(var a = 0; a < angleMax; a += 0.01){

      const x = sin(cometa.a + a - step) * cometa.r + width/2;

      const y = cos(cometa.a + a - step) * cometa.r + height/2;

      var length = map(a, 0, angleMax, 23, 5);// * r;

      if(cometa.special){

        fill(255, 0, 0);

        length *= 1.5;

      }else{

        fill(0);

      }

      circle(x, y, length);

    }

    /*

    const x2 = sin(cometa.a - step) * cometa.r + width/2;

    const y2 = cos(cometa.a - step) * cometa.r + height/2;

    fill(255);

    circle(x2, y2, 15 * r);

    */

  })

}

​

​

class Cometa {

  constructor(r, a, special){

    this.r = r;

    this.a = a;

    this.special = special;

  }

}