​

function setup() {

  createCanvas(400, 400);

  points = generatePoints(6, width/2);

}

​

function draw() {

  background(50);

  fill(255);

  noStroke();

  drawPoints(points, width/2, height/2)

}

​

function mouseReleased() {

  points = generatePoints(6, width/2 - 10);

}

​

function drawPoints(points, x, y) {

  beginShape();

  for(let i = 0; i < points.length; i ++) {

    const point = points[i];

    vertex(x + point.x, y + point.y);

  }

  endShape(CLOSE);

}

​

function generatePoints(numSegments, radius) {

  const segmentPoints = pointsForSegment(numSegments, radius);

  return snowflakeFromSegment(numSegments, segmentPoints);

}

​

function pointsForSegment(numSegments, radius) {

  const numPointsInSeg = int(random(4, 10));

  const segmentPoints = [];

  const segmentAngle = PI/numSegments;

  // Generate random points in half the segment

  for(let i = 0; i < numPointsInSeg; i ++) {

    const a = random(segmentAngle);

    const r = random(radius);

    const x = cos(a) * r;

    const y = sin(a) * r;

    segmentPoints.push(createVector(x, y));

  }

  // Reflect those points on the y axis so that

  // we have a full "branch" of the snowflake

  for(let i = numPointsInSeg - 1; i >= 0; i --) {

    const point = segmentPoints[i];

    segmentPoints.push(createVector(point.x, -point.y));

  }

  return segmentPoints;

}

​

function snowflakeFromSegment(numSegments, segmentPoints) {

  const points = [];

  for(let i = 0; i < numSegments; i ++) {

    const ang = i * TWO_PI/numSegments;

    for(let j = 0; j < segmentPoints.length; j ++) {

      const point = segmentPoints[j];

      const a = atan2(point.y, point.x) + ang;

      const r = point.mag();

      points.push(createVector(cos(a) * r, sin(a) * r));

    }

  }

  return points;

}