title: THREE: how to get an object, it is nearly CylinderGeometry but top side not circle
body: <p>I would like to ask about Three.js. How to get an object, it is nearly CylinderGeometry but one side (top or bottom) not circle. it can be an elip, rectangle,any closed shape...</p>
  
  <p>It is similar Loft command in SolidWork soft.</p>
  
  <p>How any one can help me on this.</p>
  
  <p>Thanks,
  Hung</p>