# set terminal pngcairo  background "#ffffff" enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'surface2.5.png'
set dummy u,v
set key bmargin center horizontal Right noreverse enhanced autotitles nobox
set parametric
set view 45, 50, 0.7, 1.4
set isosamples 50, 10
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set style data lines
set ticslevel 0
set title "Parametric Hexagon" 
set urange [ -1.30000 : 1.30000 ] noreverse nowriteback
set vrange [ 0.00000 : 6.28319 ] noreverse nowriteback
splot cos(v)**3*cos(u)**3,sin(v)**3*cos(u)**3,sin(u)**3