Or maybe not. I don't really know however if you do email the developers let me know their algorithm, thanks.

They replied yesterday, here's what I know now:
1) They won't give out their sources and it seems they want to keep it that way.
2) They want to think about licensing options in the near future when their project nears completion.

So no info about any technical things. And it will probably not be in my game, either. But let's see what they'll come up with in the near future.