#const a=1; c=1.63299;
{a} {a} {c} {90} {90} {120}
1 0 0
0 1 0
0 0 1
#const z=1/4; D="d";
{1/3} {2/3} {z} {D}
{2/3} {1/3} {-z} {D}
#const A="a";
{0} {0} {0} {A}