#C3---------------------------------------------- plane p 0 0 0 0 .5 -1 1 0 0 psphere p p 20 plane p2 0 0 15 0 0 1 0 -1 0 pcone p2 p2 9 7 15 bfuse f p p2 nexplode f f depouille result f 0 0 1 f_1 12 0 0 30 0 0 1 set square 5536.05