project 9: computational portrait

// isis berymon section D
//using perlin noise to randomly generate lines
//that over time create an image of my face

var isis; // portrait
var xstep = 0.0; //noise step vars
var ystep = 0.0;
var x1 = 200; //line vars
var y1 = 200;
var x2;
var y2;

//preload image
function preload(){
   isis = loadImage("https://i.imgur.com/gspKB1I.jpg");
}


function drawLine(){ //draws continuous line over canvas
    //randomly generate line path
    x2 = map(noise(xstep), 0, 1, -200, 600);
    y2 = map(noise(ystep), 0, 1, -200, 600);
    xstep += .08;
    ystep += .06;

    //use colors from portrait
    strokeWeight(2);
    stroke(isis.get(x2,y2));
    line(x1, y1, x2, y2);
    //make 2nd point 1st point and repeat
    x1 = x2;
    y1 = y2;
}

function setup(){
    createCanvas(400, 400);
    background(50);
    frameRate(60);
}

function draw(){
    drawLine();
}