title: Dynamically Adding Vertices to a Line in Three.js
body: <p>I figured out how to draw a line in threejs, the problem is that I need to dynamically add vertices to the line. When I add vertices to the line dynamically the scene doesn't update.</p>
  
  <p>I've tried <code>geometry.verticesNeedUpdate = true</code>, which doesn't seem to work.</p>