// The Coding Train / Daniel Shiffman

// https://thecodingtrain.com/CodingChallenges/166-ascii-image.html

// https://youtu.be/55iwMYv8tGI

​

// ASCII video: https://editor.p5js.org/codingtrain/sketches/KTVfEcpWx

// ASCII image canvas: https://editor.p5js.org/codingtrain/sketches/r4ApYWpH_

// ASCII image DOM: https://editor.p5js.org/codingtrain/sketches/ytK7J7d5j

// ASCII image source text: https://editor.p5js.org/codingtrain/sketches/LNBpdYQHP

// ASCII image weather API: https://editor.p5js.org/codingtrain/sketches/DhdqcoWn4

​

let sourceText;

let poem;

let gloria;

let startIndex = 0;

​

function preload() {

  gloria = loadImage("gloria48.jpg");

  sourceText = loadStrings("gloria.txt");

}

​

function setup() {

  createCanvas(800, 800); 

  poem = sourceText.join(' ');

  textFont("Courier-Bold");

}

​

function draw() {

  background(0);

  frameRate(10);

  let charIndex = startIndex;

  let w = width / gloria.width;

  let h = height / gloria.height;

  gloria.loadPixels();

    for (let j = 0; j < gloria.height; j++) {

  for (let i = 0; i < gloria.width; i++) {

      const pixelIndex = (i + j * gloria.width) * 4;

      const r = gloria.pixels[pixelIndex + 0];

      const g = gloria.pixels[pixelIndex + 1];

      const b = gloria.pixels[pixelIndex + 2];

      const avg = (r + g + b) / 3;

      noStroke();

      fill(avg);      

      textSize(w*1.2);

      textAlign(CENTER, CENTER);

      text(poem.charAt(charIndex % poem.length), i * w + w * 0.5, j * h + h * 0.5);

      charIndex++;

    }

  }

  startIndex++;

}