# boundary.dat is the data for the structure boundaries. The first column is
# D/\sigma, and the second column is eta.
#
# etavsd.dat is the data for densest packing fractions. The first column is 
# D/\sigma, and the second column is eta.
#
# PlotFig1Densest.m is the script to generate Fig.1 with MATLAB, not version
# dependent.