title: How can I fill a circle in libgdx?
body: <p>using the <a href="http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/glutils/ShapeRenderer.html" rel="nofollow">ShapeRenderer</a> class, I can only fill rectangles. </p>
  
  <ul>
  <li>So how can I fill a circle? </li>
  <li>and if possible, fill a sector (portion of a circle)?</li>
  </ul>