// 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

​

const density = "Ñ@#W$9876543210?!abc;:+=-,._                    ";

// const density = '       .:-i|=+%O#@'

// const density = '        .:░▒▓█';

​

let video;

let asciiDiv;

​

function setup() {

  noCanvas();

  video = createCapture(VIDEO);

  video.size(64, 48);

  asciiDiv = createDiv();

  asciiDiv.center()

  video.center()

}

​

function draw() {

  video.loadPixels();

  let asciiImage = "";

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

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

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

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

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

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

      const avg = (r + g + b) / 3;

      const len = density.length;

      const charIndex = floor(map(avg, 0, 255, 0, len));

      const c = density.charAt(charIndex);

      if (c == " ") asciiImage += " ";

      else asciiImage += c;

    }

    asciiImage += '<br/>';

  }

  asciiDiv.html(asciiImage);

}

​