Surfaces of rotation are generated from
a planar curve by rotating the curve around an axis.
The shape of the surface of rotation depends on
the given meridian curve, the position of the axis. Let
c(s)=
(c1(s),c2(s),c3(s)) be a curve in the xz-plane, then the expression of a
surface of rotation with respect to the z-axis is
given by
Rotation[c,z-axis](s, t) =
(cos(t)*c1(s), sin(t)*c2(s), c3(s)).
