Project 9: Portrait

// Sarah Luongo   
// sluongo
// sluongo@andrew.cmu.edu
// Project

// This code aims to draw a self-image with pixels.

var oI; // 'Original image'
var nP = 1; // 'New portrait'
var t = 210; // 'Transparency'
var tS = 10; // 'Text size'
var hS = .3; // 'Heart size'
var iS = 15; // 'Infinity size'
incT = 51; // Variable to increase size of transparency
incH = .1; // Variable to increase size of hearts
incIT = 1; // Variable to increase size of texts and infinity sign

// Loads image
function preload() {
    var ImageURL = "https://i.imgur.com/UJthwzP.jpg";
    oI = loadImage(ImageURL);
}

function setup() {
    createCanvas(480, 480);
    oI.resize(width, height); // Resizes original image
    background(59, 17, 21, t); // Redish
    oI.loadPixels();
    frameRate(60); // Rate pixels are drawn
    t = 0;
}

function draw() {
    // Generates random locations for the pixels within image size 
    var pX = floor(random(oI.width));
    var pY = floor(random(oI.height));
    var cP = oI.get(pX, pY); // 'Color picker' based on location of pixel
    var cM = oI.get(mouseX, mouseY); // Color selected based on mouse location
    noStroke();

    if (nP == 1) {
        // Draws heart pixels randomly
        fill(cP);
        heart(pX, pY);
        // Draws text pixels w/ cursor
        fill(cM);
        textSize(tS);
        text("This Is Me", mouseX, mouseY);
    } else if (nP == 2) {
        fill(cP);
        textSize(tS);
        text("Sarah", pX, pY);
        fill(cM);
        infinity(mouseX, mouseY);
    } else if (nP == 3) {
        fill(cP);
        infinity(pX, pY);
        fill(cM);
        textSize(tS);
        text("This Is Me", mouseX, mouseY);
    } else {
        fill(cP);
        textSize(random(10, 25));
        text("Sarah", pX, pY);
        fill(cM)
        heart(mouseX, mouseY);
    }	
}

// Heart Curve
// https://mathworld.wolfram.com/HeartCurve.html
function heart(pX, pY) {
    var da = .01; // How round the "curve" is
    // Creates the heart curve
    beginShape();
    for (var t = 0; t <= TWO_PI; t += da) {
        // The parametric equations found on the website commented above
        var x = (16*(pow(sin(t), 3))) * hS;
        var y = (13*cos(t)-5*cos(2*t)-2*cos(3*t)-cos(4*t)) * -hS;
        vertex(x+pX, y+pY);
    }
    endShape();
}

// Infinity Curve
// https://en.wikipedia.org/wiki/Lemniscate_of_Bernoulli
function infinity(pX, pY) {
    var da = .01;
    // Creates the infinity curve
    beginShape();
    for (var t = 0; t <= TWO_PI; t += da) {
        // The parametric equations found on the website commented above
        var x = (iS*cos(t))/(1+(pow(sin(t), 2)));
        var y = (iS*sin(t)*cos(t))/(1+(pow(sin(t), 2)));
        vertex(x+pX, y+pY);
    }
    endShape();
}

function mousePressed() {
    if (nP == 4) {
        clear();
        background(59, 17, 21, t);
        nP = 1;
    } else {
        clear();
        background(59, 17, 21, t);
        nP += 1;
    }
    // Increase size of each pixel symbol
    t += incT;
    tS += incIT;
    hS += incH;
    iS += incIT;
    // Decrease size after certain point
    if (t == 255 || tS == 30 || hS == 1.5 || iS == 30) {
        incT *= -1;
	incH *= -1;
	incIT *= -1;
    } if ( t == 1 || tS == 10 || hS == .3 || iS == 15) {
	incT *= -1;
	incH *= -1;
	incIT *= -1
    }
}