명화 비틀기

let off = 0.005;

let maxlife = 100;

let particles = [];

let img;

​

function preload() {

  img = loadImage('monalisa.png');

}

​

function setup() {

  createCanvas(600, 600);

  background(0);

​

  for(let i=0; i<6000; i++) {

    let x = random(width);

    let y = random(height);

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

    particles.push(new Particle(x, y, c));

  }

}

​

function draw() {

  // background(0);

​

  for(let p of particles) {

    p.update();

    p.show();

    if(p.isdone()) particles.splice(particles.indexOf(p), 1);

  }

}

​

class Particle {

  constructor(x, y, c) {

    this.x = x;

    this.y = y;

    this.c = c;

    this.life = maxlife;

  }

​

  update() {

    let nr = map(noise(this.x*off, this.y*off), 0, 1, 0, TAU*1.5);

    let nx = cos(nr);

    let ny = sin(nr);

    this.x += nx;

    this.y += ny;

    this.life --;

  }

​

  show() {

    fill(this.c);

    noStroke();

    ellipse(this.x, this.y, 1);

  }

​

  isdone() {

    return (this.life<0)? true : false;

  }

}