Go game board (Goban) generator for laser cutting and engraving

goboard.txt

// gramlanguage.com

size = 19 // 19 or 13 or 9
margin = 30 // board cutout margin/padding

// ---------------------------------------

size = size - 1
w = 22
h = 23.7
ww = w*size
hh = h*size

def star:
  rectangle 4 4

grid = layer:
  x = layer:
    forward size*w
    copypaste size:
      translate 0 h
  y = layer:
    right ~90
    forward size*h 0
    copypaste size:
      translate w 0
  originate

center = layer:
  star

if size > 9:
  layer:
    star
    translate ww/2-(3*w) hh/2-(3*h)
  layer:
    star
    translate ww/2-(3*w) ~hh/2+(3*h)
  layer:
    star
    translate ~ww/2+(3*w) hh/2-(3*h)
  layer:
    star
    translate ~ww/2+(3*w) ~hh/2+(3*h)
  
if size > 13:
  layer:
    star
    translate ww/2-(3*w) 0
  layer:
    star
    translate ~ww/2+(3*w) 0
  layer:
    star
    translate ww/2-(3*w) 0
  layer:
    star
    translate ~ww/2+(3*w) 0
  layer:
    star
    translate 0 hh/2-(3*h)
  layer:
    star
    translate 0 ~hh/2+(3*h)

strokecolor "blue"

cutout = layer:
  rectangle (size*w)+(margin*2) (size*h)+(margin*2)
  strokecolor "red"