// octabest.fe // Surface Evolver data for soapfilm in octahedral frame. // Tetrahedral point at center; supposed absolute minimum. // No evolution necessary. #define a 1 // vertex position on axis #define b .166666666667 // inner vertex coordinate vertices 1 a 0 0 fixed // outer vertices 2 0 a 0 fixed 3 -a 0 0 fixed 4 0 -a 0 fixed 5 0 0 a fixed 6 0 0 -a fixed 7 0 0 0 // inner vertices 8 b b b 9 -b -b b 10 b -b -b 11 -b b -b edges 1 1 2 fixed // outer edges 2 2 3 fixed 3 3 4 fixed 4 4 1 fixed 5 1 5 fixed 6 2 5 fixed 7 3 5 fixed 8 4 5 fixed 9 1 6 fixed 10 2 6 fixed 11 3 6 fixed 12 4 6 fixed 13 7 8 14 7 9 15 7 10 16 7 11 17 1 8 18 2 8 19 5 8 20 5 9 21 3 9 22 3 11 23 4 9 24 4 10 25 6 10 26 6 11 27 2 11 28 1 10 faces 1 1 18 -17 // faces on outer edges 2 2 22 -27 3 3 23 -21 4 4 28 -24 5 5 19 -17 6 6 19 -18 7 7 20 -21 8 8 20 -23 9 9 25 -28 10 10 26 -27 11 11 26 -22 12 12 25 -24 13 20 -14 13 -19 14 24 -15 14 -23 15 26 -16 15 -25 16 17 -13 15 -28 17 18 -13 16 -27 18 22 -16 14 -21