# set terminal canvas  rounded size 600,400 enhanced fsize 10 lw 1.6 fontscale 1 name "contourfill_1" jsdir "."
# set output 'contourfill.1.js'
unset key
set label 1 "set palette cubehelix\nmaxcolors 7" at screen 0.825, 0.9, 0 center norotate back nopoint
set label 2 "splot with pm3d" at screen 0.4, 0.9, 0 center norotate back nopoint
set view 60, 30, 1, 1.2
set samples 51, 51
set isosamples 51, 51
set style data lines
set xyplane relative 0
set cbtics border in scale 0.1,0.05 mirror norotate  autojustify
set xrange [ -8.00000 : 8.00000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set yrange [ -8.00000 : 8.00000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set rmargin at screen 0.75
set pm3d depthorder 
set pm3d interpolate 1,1 flush begin noftriangles border lt black linewidth 0.500 dashtype solid corners2color mean
set palette positive nops_allcF maxcolors 7 gamma 1.5 color model RGB 
set palette cubehelix start 0.5 cycles -1.5 saturation 1
set colorbox user
set colorbox vertical origin screen 0.75, 0.2 size screen 0.15, 0.6 front  noinvert bdefault
f(x,y) = sinc( sqrt(x*x + y*y) )
splot f(x,y) with pm3d