Re: [Gnuplot-info] plotting a knot on a torus

[Ethan A M. <eam...@gm...>]

On Thursday, 03 January 2019 20:37:49 Ethan A Merritt wrote:

There are more options you can turn on if you don't use parametric mode.
For example here is a pm3d version (rather than hidden3d) that may be
a better starting point:

set style fill  transparent solid 0.40 border
set view 53, 100, 1, 1
set isosamples 50, 50
set style data lines
set pm3d depthorder border lc "black"  lw 0.25
unset colorbox
unset key

splot sample [-pi:pi][-pi:pi] '++' using (2 + cos($1))*cos($2)\
                                        :(2 + cos($1))*sin($2):(sin($1))\
                                        :(0xffeebb) with pm3d lc rgb variable, \
             [-pi:pi] '+'  using ((2 + cos(3*$1))*cos(2*$1))\
                               : ((2 + cos(3*$1))*sin(2*$1))\
                               : (sin(2*$1)) with lines lw 4