Van Gogh - cypresses

let img;

​

function preload() {

  //Image author Renato Koledic

  //From http://www.paraty.com.br/pataxomurian500/ipataxo08.htm

  img = loadImage('tho2.jpg');

}

​

function setup() {

  background(255);

  noStroke();

  img.loadPixels();

  createCanvas(img.width, img.height);

}

​

function draw() {

  for(let i=0; i<20; i++)

    drawPill();

}

​

function mousePressed(){

  background(255);

}

​

function drawPill() {

  let x = random(width);

  let y = random(height);

  let color = img.get(x, y);

  let lum = .2126 * red(color) + .7152 * green(color) + .0722 * blue(color);

  let angle = lum / 255 * PI + ((x / width) * PI);

  angle /=2;

  angle += noise(x/100, y/100) * PI;

  fill(color);

  pill(x, y, random(height/40, width/200), random(height/40, width/200), angle);

}

​

function pill(x, y, width, height, rotation) {

  let size = width/6;

  let precision = width/600;

  push();

    translate(x, y);

    rotate(rotation);

    beginShape();

      for(let i=0; i<TWO_PI; i+=precision){

        let s = size;

        if(i>PI) s = size*0.7;

          vertex(cos(i+PI)*s, sin(i+PI)*s + (i<PI ? -height/2 : height/2));

      }

    endShape(CLOSE);

  pop();

}

function keyTyped() {

    if (key == 's') {

        saveCanvas("art", "jpg"); 

​

    }

    if (key == 'n') {

        currentImage++;

        currentImage %= 4;

        selectImage("img" + currentImage + ".jpg");

    }

​

}