Animate Position Tutorial

How to animate movement with Konva?

To animate a shape’s position with Konva, we can create a new animation with Konva.Animation
which modifies the shape’s position with each animation frame.

For a full list of attributes and methods, check out the Konva.Animation documentation.

Konva Animate Position Demoview raw

<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/[email protected]/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Animate Position 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 hexagon = new Konva.RegularPolygon({
        x: stage.width() / 2,
        y: stage.height() / 2,
        sides: 6,
        radius: 20,
        fill: 'red',
        stroke: 'black',
        strokeWidth: 4,
      });

      layer.add(hexagon);
      stage.add(layer);

      var amplitude = 100;
      var period = 2000;
      // in ms
      var centerX = stage.width() / 2;

      var anim = new Konva.Animation(function (frame) {
        hexagon.x(
          amplitude * Math.sin((frame.time * 2 * Math.PI) / period) + centerX
        );
      }, layer);

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

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