tube

tube $ {}
  :points-fn $ fn (radio factor)
    [] (* factor radio) 0 0
  :factor 1
  :radius 0.8
  :tubular-segments 400
  :radial-segments 20
  :position $ [] 0 0 0
  :rotation $ [] 0 0 0
  :scale $ [] 1 1 1
  :material Material