Algodoo

Interesting design, and quite clever! The only thing that I had a problem with was the reset function. If things don't go quite right (like a jam, etc) then when I try to clear it and reset it, the printer starts spawning more material before it is clear of jammed material. I think it might reset better and cleaner if you combine the "clear" and the "reset", rather than as separate functions. Then maybe give a small delay before the printer starts spawning more material in order to give the reset function a chance to clear and reset the printer before starting over. Just a friendly suggestion.

There's other problem too, what happens if there's any other surface inside of the polygon? (talking on 2D plane)

Yes lololoer. It's only capable of solid forms with no hidden surfaces, but this is a problem with real laser scanning as well. The scanned object is limited to the reach of the laser.

ya plus why the 3D print Wont Balane if i put a cidcle?!?!

very beautiful.
very interesting.
very good!!

I put shape,pressed enter and it doesn't print.