#G2----------------------------------------------
profile p l 7 c 2 135 c -2 90 c 2 135 l 7 
polyline w 0 0 0 0 0 12
pipe p w p
nexplode p f
depouille result p 0 0 1 p_8 4 0 0 10 0 0 1 \
p_1 3 0 0 0 0 0 1

set square 618.869