Superellipse

Superellipse is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

A superellipse is a geometric figure defined as the set of all points (x, y) with

$\left|{\frac {x}{a}}\right|^{n}\!+\left|{\frac {y}{b}}\right|^{n}\!=1,$

where n, a and b are positive numbers.

The task: draw a superellipse with n = 2.5, and a = b = 200