🧪 2D Superformula — Gielis Curve Plotter

This 2D companion evaluates the exact same Gielis superformula the 3D version uses to build its mesh, but only once per angle instead of twice — so instead of a rotating solid you get the flat polar curve it is built from, traced in real time. Six sliders (m for rotational symmetry, n1/n2/n3 for how sharply the curve pinches and rounds between lobes, and a/b for independent axis scaling) let you push the shape from a plain circle through stars, gears and flower petals, while a numeric panel reports the curve's minimum, maximum and mean radius, its enclosed area and perimeter (both computed directly from the sampled points via the shoelace formula and segment-length summation), and a live count of visible lobes — turning the abstract equation into something you can read off the screen as you drag.