Largest empty circle

<!doctype html>
<html>
  <head>
    <title>Largest empty circle</title>
    <script src="https://unpkg.com/d3@4.4.1"></script>
    <script src="https://unpkg.com/faster-delaunay@1.0.0"></script>
    <style>

html, body {
      margin: 0;
      padding: 0;
      width: 100%;
      height: 100%;
    }

.control {
      position: absolute;
      top: 20px;
      right: 20px;
      padding: 10px 20px;
      font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
      font-weight: 300;
      font-size: 13px;
      background: #fff;
      border-radius: 4px;
      box-shadow: 0 0 5px rgba(0,0,0,0.5);
    }

.control h4 {
        font-weight: 300;
      }

.control input[type=number] {
        width: 50px;
      }

.control div {
        margin-top: 5px;
      }

</style>
  </head>
  <body>
    <canvas id="canvas"></canvas>
    <form class="control" id="params">
      <div>
        <label>
          <input type="number" id="candidates" value="15"> Candidates</label>
      </div>
      <div>
        <label>
          <input type="number" id="minRadius" value="0"> R<sub>min</sub></label>
      </div>
    </form>
    <script src="index.js"></script>
  </body>
</html>

https://unpkg.com/d3@4.4.1

https://unpkg.com/faster-delaunay@1.0.0