Penrose Kite / Dart tiling

This generates the kite and dart tiles and all 7 vertex figures possible with Penrose aperiodic kite-dart tiling https://en.wikipedia.org/wiki/Penrose_tiling#Kite_and_dart_tiling_(P2).

Tabs at the edges both link tiles and restrict tile placement to those allowed.

I've only laser cut tiles from 4mm ply. The photo shows a tiling in which all 7 vertex figures can be seen.

Inset can be adjusted to get a snug fit on laser cut or 3D printed tiles.

The tile and configuration descriptions are short but a largish set of functions are needed to created the tiled figures.

There are other Penrose tile designs on Thingiverse but AFAIK this is the only customisable version.

Bit more in my blog http://kitwallace.tumblr.com/post/173765765969/interlocking-penrose-kite-dart-tiling