Gielis2d

The superformula is a generalization of the superellipse and was first
proposed by Johan Gielis.
Gielis suggested that the formula can be used to describe many complex
shapes and curves that are found in nature. Others point out that the
same can be said about many formulas with a sufficient number of
parameters.
Gielis, Johan (2003), "A generic geometric transformation that unifies a
wide range of natural and abstract shapes", American Journal of Botany 90(3): 333-338,

Created by Giuseppe Cardillo
giuseppe.cardillo-edta@poste.it

To cite this file, this would be an appropriate format:
Cardillo G. (2006). Superformula Generator 2d: a GUI interface to trace a
2d plot of the parametric Gielis Superformula.
http://www.mathworks.com/matlabcentral/fileexchange/10189