createCanvas(512,512);

}

​

function makeRandomPattern()

{

  ts = [];

  let num = int(random(2,4));

  for( let idx = 0; idx < num; ++idx ) {

    ts.push( [random(TWO_PI),random(0.1,5),random(TWO_PI)])

  }

  let x = 0;

  let y = 0;

  let res = [];

  for( let idx = 0; idx < 10000; ++idx ) {

    res.push( [x,y] );

    let t = map( idx, 0, 10000, 0, 2*TWO_PI );

    let theta = 0.0;

    for( ps of ts ) {

      theta += ps[0]*sin(ps[1]*t + ps[2]);

    }   

   // console.log( theta );

    x += cos( theta );

    y += sin( theta );

  }

  res.push( [x,y] );

//  console.log( res );

  return res;

}

​

function draw() {

  background(128);

  const pt = makeRandomPattern();

  let xmin = pt[0][0];

  let xmax = pt[0][0];

  let ymin = pt[0][1];

  let ymax = pt[0][1];

  for( let p of pt ) {

    xmin = min( xmin, p[0] );

    xmax = max( xmax, p[0] );

    ymin = min( ymin, p[1] );

    ymax = max( ymax, p[1] );

  }

  let sc = min( width / (xmax-xmin), height / (ymax-ymin) );;

​

  noFill();

​

  push();

  translate( width/2, height/2 );

  scale( sc );

  translate( -0.5*(xmin+xmax), -0.5*(ymin+ymax) );

  strokeWeight( 0.5 / sc );

  for( let idx = 0; idx < 50000; ++idx ) {

    let i = int(random(pt.length-1));

    let p = pt[i];

    let q = pt[i+1];

    let d = dist( p[0], p[1], q[0], q[1] ) / (50*abs(randomGaussian(0,1)));

    let dx = (q[0]-p[0])/d;

    let dy = (q[1]-p[1])/d;

      stroke( 0, 5 );

​

    line( p[0], p[1], p[0] - dy, p[1] + dx );

    stroke(255,5);

        line( p[0], p[1], p[0] + dy, p[1] - dx );

​

  }

    stroke( 0 );

  strokeWeight( 2 / sc );

  beginShape();

  for( let p of pt ) {

    vertex( p[0], p[1] );

  }

  endShape();

  pop();

  noLoop();

}

​

function keyPressed()

{

  if( key == ' ' ) {

    loop();

  } else if( key == 's' ) {

    save( "output.png" );

  }

}