[Pcb2gcode-devel] Two very minor additions

[jmcgee <jm...@je...>]

I've added two very simple features to pcb2gcode for my own use:

1) A command line option (drill-front) and code so that the drilling
gcode is generated for drilling into the front of the pcb (as opposed to
the back). I use this since I've been making single sided boards using
only the front side copper.

2) A command line option (extra-isolation) and code that makes the
Surface::get_toolpath function generate multiple passes of the mill bit
around each track. Each extra pass is made by growing the track 1/2 the
tool diameter and then generating a new set of tool paths (collecting
all the milling paths together). This results in larger isolations
between used paths and unused copper while keeping fine detail, with the
obvious trade off of increased milling time and tool wear. Also, no
attempt has been made to collapse redundant paths. I find the larger
isolation makes it easier to solder components without inadvertently
shorting something to the unused copper.

The changes were made to the 1.0.6 version of pcb2gcode. 

If you would be interested in considering either patch for inclusion in
the codebase I would be happy to provide the code in whatever form would
be most useful, and/or make any requested changes necessary for
inclusion.

--madscifi