Oscillating Blobs

Instructions: Refresh the page to generate new blobs. You can also drag and drop the blobs as they animate.

Konva Quantum Squiggle Demoview raw

<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/[email protected]/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Quantum Squiggle Demo</title>
    <style>
      body {
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #f0f0f0;
      }
    </style>
  </head>
  <body>
    <div id="container"></div>
    <script>
      var width = window.innerWidth;
      var height = window.innerHeight;

      var stage = new Konva.Stage({
        container: 'container',
        width: width,
        height: height,
      });
      var layer = new Konva.Layer();
      var colors = ['red', 'orange', 'yellow', 'green', 'blue', 'purple'];
      var blobs = [];

      // create 6 blobs
      for (var n = 0; n < 6; n++) {
        // build array of random points
        var points = [];
        for (var i = 0; i < 5; i++) {
          points.push(stage.width() * Math.random());
          points.push(height * Math.random());
        }

        var blob = new Konva.Line({
          points: points,
          fill: colors[n],
          stroke: 'black',
          strokeWidth: 2,
          tension: 0,
          opacity: Math.random(),
          draggable: true,
          closed: true,
        });

        layer.add(blob);
        blobs.push(blob);
      }

      stage.add(layer);

      var period = 2000;
      var centerTension = 0;
      var amplitude = 1;

      var anim = new Konva.Animation(function (frame) {
        for (var n = 0; n < blobs.length; n++) {
          blobs[n].tension(
            amplitude * Math.sin((frame.time * 2 * Math.PI) / period) +
              centerTension
          );
        }
      }, layer);

      anim.start();
    </script>
  </body>
</html>

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