Credited to John Shier
Documented here by Paul Bourke
May 2013

The following describes a simple formulation that gives rise to "blob" shaped objects. It is described in polar coordinates as follows:

In order for the curve to not self intersect a + b should be less than 1.

The area is given by.

Which reduces to:

One can add further harmonics which introduces higher degree of variation in the radius, some examples of the next harmonic added follows.