How to generate objects by thorn?

Question

Unity

For those who do not know what a thorn is.
Thorn is the shape of a donut. I hope it's clear
. There is a code that generates asteroids, but in Random there is only generation by sphere, but I need a turn.
How to do it?

Answer 1

Everything is very simple. You have a function, you parametricize it , and then you generate two parameters to calculate x, y, and z.