const Vertex tank_v[] = {
  {    0,0,0}, // Vertex indices in .OBJ files are based at 1.
  {   11 /*  0.678926 */,     0 /*  0.006243 */,   -23 /* -1.431577 */},
  {    3 /*  0.185821 */,    21 /*  1.321108 */,   -19 /* -1.170033 */},
  {  -11 /* -0.678923 */,     0 /*  0.006243 */,   -23 /* -1.431577 */},
  {   -3 /* -0.185817 */,    21 /*  1.321108 */,   -19 /* -1.170033 */},
  {   11 /*  0.678926 */,     0 /*  0.006243 */,    23 /*  1.431577 */},
  {  -11 /* -0.678924 */,     0 /*  0.006243 */,    23 /*  1.431577 */},
  {  -15 /* -0.947506 */,     6 /*  0.403985 */,    31 /*  1.948032 */},
  {   15 /*  0.947508 */,     6 /*  0.403985 */,    31 /*  1.948032 */},
  {   15 /*  0.947508 */,     6 /*  0.403985 */,   -31 /* -1.948032 */},
  {  -15 /* -0.947505 */,     6 /*  0.403985 */,   -31 /* -1.948032 */},
  {    9 /*  0.565637 */,    12 /*  0.751525 */,   -23 /* -1.457166 */},
  {   -9 /* -0.565635 */,    12 /*  0.751525 */,   -23 /* -1.457166 */},
  {   -7 /* -0.447056 */,    12 /*  0.751542 */,     8 /*  0.517595 */},
  {    7 /*  0.447058 */,    12 /*  0.751542 */,     8 /*  0.517595 */},
  {    1 /*  0.060000 */,    19 /*  1.214367 */,   -14 /* -0.853757 */},
  {   -1 /* -0.060000 */,    19 /*  1.214367 */,   -14 /* -0.853757 */},
  {    1 /*  0.060000 */,    18 /*  1.094374 */,    -8 /* -0.498219 */},
  {   -1 /* -0.060000 */,    18 /*  1.094374 */,    -8 /* -0.498219 */},
  {    1 /*  0.060000 */,    18 /*  1.094374 */,    20 /*  1.236018 */},
  {   -1 /* -0.060000 */,    18 /*  1.094374 */,    20 /*  1.236018 */},
  {   -1 /* -0.060000 */,    19 /*  1.214374 */,    20 /*  1.236018 */},
  {    1 /*  0.060000 */,    19 /*  1.214374 */,    20 /*  1.236018 */},
  { -128,-128,-128}, /* End of list marker */
};
const Edge tank_e[] = {
  {    1,    3 },
  {    1,    5 },
  {    1,    9 },
  {    2,    4 },
  {    2,   11 },
  {    2,   14 },
  {    3,    6 },
  {    3,   10 },
  {    4,   12 },
  {    4,   13 },
  {    5,    6 },
  {    5,    8 },
  {    6,    7 },
  {    7,    8 },
  {    7,   10 },
  {    7,   13 },
  {    8,    9 },
  {    8,   14 },
  {    9,   10 },
  {    9,   11 },
  {   10,   12 },
  {   11,   12 },
  {   11,   14 },
  {   12,   13 },
  {   13,   14 },
  {   15,   16 },
  {   15,   17 },
  {   15,   22 },
  {   16,   18 },
  {   16,   21 },
  {   17,   18 },
  {   17,   19 },
  {   18,   20 },
  {   19,   20 },
  {   19,   22 },
  {   20,   21 },
  {   21,   22 },
  {    0,    0 }  /* End of list. (Index 0 is never used) */
};