#B3---------------------------------------------- plane p 0 0 0 1 0 0 0 -1 0 pcylinder p p 10 20 plane p2 10 0 5 0 0 1 pcone p2 p2 7 5 20 bfuse f p p2 nexplode f f depouille result f 0 0 1 f_4 10 0 0 25 0 0 1 set square 2441.77