jquery-turtle/test/fern.html at debuglog · Mirailite/jquery-turtle · GitHub

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<script src="lib/qunit.js"></script>
<link href="lib/qunit.css" rel="stylesheet">
<script src="lib/jquery.js"></script>
<script src="../jquery-turtle.js"></script>
<body>
<div id="qunit"></div>
<script>
eval($.turtle());
$.turtle.hangtime = Infinity;  // Allow for slow CPUs.
module("Fern test.");
asyncTest("Draws a fractal and verifies its shape.", function() {
  speed(Infinity);
  function fern(x) {
    if (x > 1) {
      fd(x);
      rt(95);
      fern(x * .4);
      lt(190);
      fern(x * .4);
      rt(100);
      fern(x * .8);
      lt(5);
      bk(x);
    }
  }
  bk(100);
  pen(green);
  fern(50);
  pen(null);
  ok(touches(green));
  fd(200);
  ok(touches(green));
  fd(10);
  ok(!touches(green));
  rt(90);
  fd(70);
  ok(touches(green));
  fd(5);
  ok(!touches(green));
  done(start);
});
</script>