3D Fourier Transform "Art"

Hi, I discovered “OpenSCAD” with the OpenSCAD contest.Because its core is programming, I had to try implementing mathematical things. Concept:This openSCAD file makes use of “Fourier Transforms” which is a way of expressing any signal as a sum of cosine functions of different amplitude, intial phase and frequency.There are a lot of great video about this operation. This video from 3B1B is excellent and is my inspiration for this project. The concept of this model is to draw the result of a given sum of cosines as a 2D sculpture. Two last parameters (Amplitude3D and Frequency3D) controls the geometry of the scuplture on the Z axis Parameters: There are 3 ways to control amplitude of the cosines:Manual policy : You can enforce a given amplitude for each cosine using the sliders.Enveloppe policy : You can enforce a maximum amplitude for each cosine using the sliders. The actual amplitude will be random between 0 and your max.FullRandom policy : Amplitudes are choosen randomly. Sliders are