Gridon top of objects?...

 From:  Frenchy Pilou (PILOU)
2212.8 
Silly idea ;)
Why not another grids? Spheric, Hyperbolic, logarithmic etc...?
Can be useful!
I believe that I have not seen that anywhere, and seems to me that is not a big deal?
How works the snaping in general? does calculates are remade each time for a point of a grid screen's grid or there some points in memory?

EDITED: 4 Dec 2008 by PILOU