#old revolrib4 pcone c1 4 3 5 pcone c2 2 1 3 ttranslate c2 0 0 5 bfuse s c1 c2 vertex v1 0 -3 5 vertex v2 0 -1 8 edge e1 v1 v2 wire w e1 plane pl 0 -3 5 -1 0 0 featrf s w pl 0 0 0 0 0 1 0.2 0.2 1 1 featperform rf result set square 213.845