free-fall-manual.https.html

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<html>

  <head>

    <title>DeviceMotionEvent: A device in free-fall, with the screen horizontal and upmost</title>

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

    <link rel="author' title='Mosquito FP7">

    <link rel="reviewer author" title="Zhiqiang Zhang" href="mailto:zhiqiang.zhang@intel.com"> <!-- 2013-10-14 -->

  </head>

  <body>

    <p>Free fall the device to run the test, with the screen horizontal and upmost.</p>

    <div id="log"></div>

    <script>

      var t = async_test();

      var run = false;

/*

       * A device in free-fall, with the screen horizontal and upmost,

       * has an accelerationIncludingGravity of zero and

       * the following value for acceleration:

* {

       *   x: 0,

       *   y: 0,

       *   z: -9.81

       * };

*/

      window.addEventListener("devicemotion", function(e) {

        if (!run) {

          run = true;

          t.step(function() {

            var gvt = e.accelerationIncludingGravity;

            var acc = e.acceleration;

            assert_approx_equals(gvt.x, 0, 1);

            assert_approx_equals(gvt.y, 0, 1);

            assert_approx_equals(gvt.z, 0, 1);

            assert_approx_equals(acc.x, 0, 1);

            assert_approx_equals(acc.y, 0, 1);

            assert_approx_equals(acc.z, -9.81, 1.5);

});

          t.done();

      }, false);

    </script>

  </body>

</html>