#C3---------------------------------------------- plane p 0 0 0 1 0 0 pcone p p 15 18 20 90 plane p2 10 -7 10 0 0 1 pcone p2 p2 5 4 20 bfuse f p p2 nexplode f f depouille result f 0 0 1 f_6 1 0 0 30 0 0 1 set square 2002.16