Duuuuude, you have gone some lightyears further in the coding. Also glad to see your progress!
1. Also, I've never known anything about orpheu and at this point I'm too afraid to work with it, but there is first time for everything! So I'm gonna try what you have suggested, since it seems to be the most effective method. I'll just need some little example of the function, to create some conception in my mind. Will google a lot, it's obvious.

2. That's clear, I think I'll succeed with it.
3. Aaaand that's again super unknown for me... I mean, the find_sphere_class(), how do I define the end point of the radius and in which value is the distance from the center to the end point of the radius?
And before someone says to google and search - I did that already, but at this point I've understood nothing from the threads around...
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