# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 # set output 'singulr.18.png' set dummy u,v unset key set parametric set view 60, 20, 1, 1 set isosamples 39, 40 set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover set title "Klein bottle with look at the 'inside'" set urange [ 0.00000 : 6.28319 ] noreverse nowriteback set vrange [ 0.00000 : 4.18879 ] noreverse nowriteback set xrange [ -10.0000 : 10.0000 ] noreverse nowriteback set yrange [ -10.0000 : 10.0000 ] noreverse nowriteback set zrange [ -3.00000 : 3.00000 ] noreverse nowriteback splot (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*cos(v), (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*sin(v), 2*sin(u)*sin(v/2)+sin(2*u)*cos(v/2)