// Capped Cylinder, closed [or open ended]
// cylinder { <END1>, <END2>, RADIUS [open] }
//  END1 = coord of one end of cylinder
//  END2 = coord of other end
// RADIUS = size of cylinder
// open = if present, cylinder is hollow, else capped
cylinder
{
  0*x,  3*x,  1
  // open
}