mkDisp.rb reads DISP and SPOSCAR and writes atom position informations
to POSCAR style supercell files containing displacements. The default
displacement coefficient, which is multiplied by each element of
a displacement written in
DISP file, is 0.01 Å.
mkDisp.rb [OPTION] [DISP] [SPOSCAR]
-a, -b, -c
Displacement length introduced to POSCAR file (Å)