Bits have width...

I'm working on generating custom gcode to carve topless boxes. The intent is to use them for a dresser I'm building for my daughter.

For my first test I did a bottom and a side; the side is the top piece.

The code for the boxes is up at https://github.com/razeh/gcode-boxes; unlike a lot of other box generators it generates straight gcode, without any intermediate vector representations.

It has two problems: it isn't take the width of the bit into account when it carves the indents, and it doesn't create an tabs for the sides.  I hadn't realized how important tabs are until the bottom piece dropped out from the plywood while the router was still moving.