Use this formula to calculate a spherical shape with a flat top (as if it has been chopped off).
This site uses an absolute minimum of cookies.
No calculations are saved, and nothing is stored. Unfortunately, this means you have to start from scratch for each reload. But, that's the price for privacy and confidentiality.
I do have a counter to get some statistics of what pages are most visited. I’m the only one with access to this info.