Yes, this project got some powerful cooperators and supporters, let's begin!
At first, I have to learn 'How to get one or some target(s) face', and 'How to extrude it(them)'. This two issues are most 'basically' important for this project. I'm still searching the answers on the net, but I didn't find good sites. Anybody know good tutorial sites or documents for it?
I think at first, the face is selected from a 'plane' object.