REVDANCATT'S GENUARY 2023

08 - Signed Distance Functions

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<head>
  <title>Genuary 08 - SDF</title>
  <script id="fxhash-snippet">
    //---- do not edit the following code (you can indent as you wish)
    let alphabet = "123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"
    var fxhash = "oo" + Array(49).fill(0).map(_ => alphabet[(Math.random() * alphabet.length) | 0]).join('')
    // fxhash = 'oouAMQaskYYawHXpF3Gn97xkJMc98mmgJCxQ1NBENnvHBvmY6AF'
    const urlHash = new URLSearchParams(window.location.search).get('fxhash')
    if (urlHash) fxhash = urlHash
    let b58dec = str => [...str].reduce((p, c) => p * alphabet.length + alphabet.indexOf(c) | 0, 0)
    let fxhashTrunc = fxhash.slice(2)
    let regex = new RegExp(".{" + ((fxhash.length / 4) | 0) + "}", 'g')
    let hashes = fxhashTrunc.match(regex).map(h => b58dec(h))
    let sfc32 = (a, b, c, d) => {
      return () => {
        a |= 0;
        b |= 0;
        c |= 0;
        d |= 0
        var t = (a + b | 0) + d | 0
        d = d + 1 | 0
        a = b ^ b >>> 9
        b = c + (c << 3) | 0
        c = c << 21 | c >>> 11
        c = c + t | 0
        return (t >>> 0) / 4294967296
      }
    }
    var fxrand = sfc32(...hashes)
    // true if preview mode active, false otherwise
    // you can append preview=1 to the URL to simulate preview active
    var isFxpreview = new URLSearchParams(window.location.search).get('preview') === "1"
    // call this method to trigger the preview
    function fxpreview() {
      console.log("fxhash: TRIGGER PREVIEW")
    }
    //---- /do not edit the following code
  </script>

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