title: Creating a ring/circle sector with the CanvasRenderer
body: <p>Trying to create a number of circle/ring segments using Three.JS and the CanvasRenderer.</p>
  
  <p>Example using <code>THREE.Shape</code> and <code>THREE.ShapeGeometry</code> here: <a href="http://jsfiddle.net/25U8E/1/" rel="nofollow">http://jsfiddle.net/25U8E/1/</a></p>
  
  <p>The triangulation looks wrong to me and when I tried to move the vertices by directly modifying geometry.vertices[n].x etc. the THREE.Shape I am using degrades and becomes less smooth.</p>
  
  <p>Is there a better way to create a sector - one that allows me to modify the vertices afterwards?</p>