title: An algorithm to find bounding box of closed bezier curves?
body: <p>I'm looking for an algorithm to find bounding box (max/min points) of a closed quadratic bezier curve in Cartesian axis:</p>
  <pre><code>input: C (a closed bezier curve)
  output: A B C D points
  </code></pre>
  <p><a href="http://www.imagechicken.com/uploads/1270586513022388700.jpg" rel="nofollow noreferrer">Image http://www.imagechicken.com/uploads/1270586513022388700.jpg</a></p>
  <p><strong>Note</strong>: above image shows a smooth curve. it could be not smooth. (have corners)</p>