# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'hidden.7.png'
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics nortics nomrtics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid layerdefault   lt 0 linecolor 0 linewidth 0.500,  lt 0 linecolor 0 linewidth 0.500
set view 50, 30, 1, 1
set samples 20, 20
set isosamples 20, 20
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set contour base
set style data lines
set title "Hidden line removal of explicit surfaces" 
set xrange [ 0.00000 : 15.0000 ] noreverse
set yrange [ 0.00000 : 15.0000 ] noreverse
set zrange [ -1.00000 : 1.00000 ] noreverse
NO_ANIMATION = 1
## Last datafile plotted: "glass.dat"
splot "glass.dat" using 1