Re: [Maxima-discuss] terminal=tikz?

[Robert D. <rob...@gm...>]

On Tue, Nov 22, 2022 at 8:32 PM Eduardo Ochs <edu...@gm...> wrote:

> I have just tested adding a new gnuplot terminal called $pict2e, and
> everything worked. Here are the details, for the sake of completeness.
>
> I changed the functions update-terminal - defined in
> share/draw/grcommon.lisp - and draw_gnuplot - defined in
> share/draw/gnuplot.lisp - by following the same instructions that I
> had used to add a terminal called $tikz, and then I ran
>
>   make clean
>   make
>   make install

> After that I ran this in Maxima,
>
>   F(x,y) := 2*x^2 - x*y - y^2;
>   set_plot_option ([gnuplot_term,     "tikz"]);
>   set_plot_option ([gnuplot_out_file, "/tmp/myplot.tikz"]);
>   plot2d([contour, F(x, y)], [x, -2, 2], [y, -2, 2]);
>   set_plot_option ([gnuplot_term,     "pict2e"]);
>   set_plot_option ([gnuplot_out_file, "/tmp/myplot.pict2e"]);
>   plot2d([contour, F(x, y)], [x, -2, 2], [y, -2, 2]);

Eduardo, I'm glad to hear you got it working. There is still some
confusion between draw2d and plot2d, and I apologize again for this
messy situation.

Given that you are calling plot2d to generate the plots, the
modifications to share/draw/*.lisp have no effect. In addition, since
share/draw/*.lisp is loaded at runtime, and not compiled into the
binary image which contains the built-in functions, it is not
necessary to rebuild Maxima in order for modifications to
share/draw/*.lisp to take effect.

Incidentally what this shows is that plot2d is more lenient about the
Gnuplot terminal specification -- looking at the code, I see plot2d
doesn't know about tikz or pict2e specifically; it just outputs "set
term <whatever>" to Gnuplot, so any terminal type known to Gnuplot
should work.

Hope this helps,

Robert