# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 
# set output 'hidden.6.png'
set view 80, 30, 1, 1
set samples 20, 20
set isosamples 20, 20
set contour base
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set style data lines
set title "Hidden line removal of explicit surfaces" 
set xrange [ 0.00000 : 15.0000 ] noreverse nowriteback
set yrange [ 0.00000 : 15.0000 ] noreverse nowriteback
set zrange [ -1.00000 : 1.00000 ] noreverse nowriteback
splot "glass.dat" using 1