static Shape onePathToShape(OnePath onePath) {
  if (onePath == null) null;
  
  new Path2D.Float path;
  Iterator<Pt> it = onePath.pointIterator();
  Pt p = it.next();
  path.moveTo(p.x, p.y);
  
  while (it.hasNext()) {
    p = it.next();
    path.lineTo(p.x, p.y);
  }
  
  ret path;
}