clopen/convert.html at main · atorresen/clopen · GitHub

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<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <link rel="stylesheet" href="styles.css">
  <link rel="icon" href="images/icon.ico">

  <script src="p5/p5.js"></script>

  <title>convert</title>
</head>

<body>

  <div class="graphic" id="baseConvertGraphic"></div>

  <div class="pageButton">
    <form id="baseConvertForm" action="/action_page.php">
      <input type="text" id="expr" value="horizontal"><br>
      <input type="number" min="2" max="35" class="numInput" step="1" id="from" value=23>
      <input type="number" min="2" max="35" class="numInput" step="1" id="to" value=25>
    </form>
    <h1 id="convert" onclick="baseConvert()">go</h1>
  </div>

  <div class="backButton"><a href="index.html">back</a></div>

  <script>
    var charToDigit = {
      "0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5, "6": 6, "7": 7, "8": 8,
      "9": 9, "a": 10, "b": 11, "c": 12, "d": 13, "e": 14, "f": 15, "g": 16,
      "h": 17, "i": 18, "j": 19, "k": 20, "l": 21, "m": 22, "n": 23, "o": 24,
      "p": 25, "q": 26, "r": 27, "s": 28, "t": 29, "u": 30, "v": 31, "w": 32,
      "x": 33, "y": 34, "z": 35
    };

    var w, h;

    function setup() {
      if (windowWidth > 550) {
        w = 0.8 * windowWidth
      } else {
        w = 0.95 * windowWidth
      };
      h = 0.82 * windowHeight;
      var myCanvas = createCanvas(w, h);
      myCanvas.parent("baseConvertGraphic");
    };

    function baseConvert() {
      var inputs = document.getElementById("baseConvertForm");

      // convert each inputted characeter into its corresponding digit
      var word = inputs.elements[0].value;
      word = word.toLowerCase().replace(/[^a-z]+/g, '');
      var chars = word.split("").reverse();

      var charVals = [];
      for (var i = 0; i < chars.length; i++) {
        charVals[i] = charToDigit[chars[i]];
      };

      // convert from oldbase to newbase
      var oldbase = inputs.elements[1].value;
      var newbase = inputs.elements[2].value;

      // convert the word digits from oldbase to base 10 (sum powers of oldbase)
      var baseTenVal = (Array.from(
        charVals,
        (x, i) => (x * Math.pow(oldbase, i))
      )).reduce(add, 0);

      // convert the base ten value to newbase
      var newBaseNum = baseTenVal.toString(newbase);

      // get an array of the value corresponding to each digit in the newbase number
      var newChars = newBaseNum.split("");
      var newCharVals = [];
      for (var i = 0; i < chars.length; i++) {
        newCharVals[i] = charToDigit[newChars[i]];
      };

      // draw rectangles corresponding to newbase digits
      drawDigitRectangles(newCharVals)
    };

    function add(accumulator, a) {
      return accumulator + a
    };

    function drawDigitRectangles(digits) {
      clear();

      var len = digits.length;
      var maxWidth = 0.9 * w;
      var hh = (0.75 * h) / len;

      for (let i = 0; i < len; i++) {
        for (let j = 0; j < digits[i]; j++) {
          var ww = maxWidth / (digits[i]);
          noStroke();

          // alternate fill colors
          if ((j % 2) == 0) {
            if ((i % 2) == 0) {
              fill("black")
            } else {
              fill("skyblue")
            };
          } else {
            if ((i % 2) == 0) {
              fill("skyblue")
            } else {
              fill("black")
            };
          };

          // leave 0 rows blank
          if (digits[i] > 0) {
            rect(j * ww, i * hh, ww, hh);
          } else {
            i++
          }
        }
      }
    };
  </script>


</body>

</html>