// The Coding Train / Daniel Shiffman

// https://thecodingtrain.com/challenges/108-barnsley-fern

// https://youtu.be/JFugGF1URNo

​

// Code from Challenge: https://editor.p5js.org/codingtrain/sketches/G4V940Y8V

​

let x = 0;

let y = 0;

​

function setup() {

  createCanvas(640, 360);

  background(0);

}

​

function draw() {

  for (let i = 0; i < 300; i++) {

    drawPoint();

    nextPoint();

  }

}

​

function drawPoint() {

  // colorMode(HSB, 1.0);

  // stroke(y/9.9983,255,255);

  stroke(255);

  strokeWeight(2);

  let px = map(x, -2.182, 2.6558, 0, width);

  let py = map(y, 0, 9.9983, height, 0);

​

  point(px, py);

}

​

function nextPoint() {

  let nextX;

  let nextY;

  let r = random(1);

​

  if (r < 0.01) {

    nextY = 0.16 * y;

    nextX = 0;

  } else if (r < 0.86) {

    nextX = 0.85 * x + 0.04 * y;

    nextY = -0.04 * x + 0.85 * y + 1.6;

  } else if (r < 0.93) {

    nextX = 0.2 * x + -0.26 * y;

    nextY = 0.23 * x + 0.22 * y + 1.6;

  } else {

    nextX = -0.15 * x + 0.28 * y;

    nextY = 0.26 * x + 0.24 * y + 0.44;

  }

  x = nextX;

  y = nextY;

}

​