Project 09 : Computational Portrait

The Image is based on how Octopus uses their camouflage:

So Basically I created a bunch of particles that ages and disappear eventually:

when those particles first appear they growth rapidly then they slowly shrink and fade away

Base Image:

/*
 * Andrew J Wang
 * ajw2@andrew.cmu.edu
 * Section A
 *
 * This Program is Face
 */

//face image for preload the data
let faceImage;
//array of global particles
var particles = [];

//preload image
function preload(){
    faceImage = loadImage("https://i.imgur.com/i3WmsKd.jpeg");
}


function particleStep() {
    //age of the particles 
    this.age++;

    //shrine slowly after 45 age
    if (this.age % 2 == 0 & this.age >= 45)
        {
            this.sz = this.sz * 0.98;
        }
    //grow rapidly before 45 age
    else if (this.age % 2 == 0 & this.age < 45)
        {
            this.sz = this.sz * 1.1;
        }

}
 
 
function particleDraw() {
    push();
    //grab color based on the location on the image
    var kolor = faceImage.get(this.x*2, 220+this.y*2);
    fill(kolor);
    noStroke();
    rectMode(CENTER);
    //create rectangle based on location size and color
    rect(this.x, this.y, this.sz, this.sz);
    pop();
}
 

//create color particles
function makeParticle(px, py, size) {
    p = {x: px, y: py,
         age: 0,
         sz: size,
         stepFunction: particleStep,
         drawFunction: particleDraw
        }
    return p;
}
 
 
function setup() {
    createCanvas(480,480);
    frameRate(120);
}


function draw() {
    background(220);
    stroke(0);

//create 30 particles per fram just to fill the whole image with particles
    for (var n=0; n<30; n++)
    {
        //create particles at random location on the canvas, origin size = 1
        var p = makeParticle(random(480), random(480),1);
        particles.push(p);
    }

    //new particles to refresh
    newParticles = [];
        for (var i = 0; i < particles.length; i++){ // for each particle
        var k = particles[i];
        //draw and refresh particles
        k.stepFunction();
        k.drawFunction();
        if (k.age < 250) {
            //if younger than 250 keep them if not they are gone
        newParticles.push(k);
        }
    }
        // particles refreshed by the new particles
        particles = newParticles;

}