// create a Surface of Revolution shape (like lathe, but faster)
sor {
    7, // # of points
    <0.000000, 0.000000> // list of <u,v> points
    <0.118143, 0.000000>
    <0.620253, 0.540084>
    <0.210970, 0.827004>
    <0.194093, 0.962025>
    <0.286920, 1.000000>
    <0.468354, 1.033755>
    // [open]
}