#C1----------------------------------------------
plane p -10 0 0 1 0 0 
pcone pn p 5 10 20
box bx -5 -5 0 10 10 15
bfuse f bx pn
nexplode f f
depouille result f 0 0 1 f_7 5 0 0 15 0 0 1 \
f_3 4 0 0 15 0 0 1

set square 1703.96