[Maxima-discuss] terminal=tikz?

[Eduardo O. <edu...@gm...>]

Hi Robert and all,

I am still trying to digest all the hints in this thread...

  https://sourceforge.net/p/maxima/mailman/message/37737109/

First problem: setting the terminal to "tikz" doesn't work for me. I
am running this version of Maxima,

  Maxima branch_5_46_base_555_g6fa201ff5

that I git-pull'ed and compiled a few minutes ago, and a gnuplot from
2020...  but I followed the instructions here

  http://www.gnuplot.info/docs/latex_demo.pdf

to check if my gnuplot supports tikz, and the answer seems to be yes -
I ran "set terminal tikz" in a gnuplot REPL and got:

  gnuplot> set terminal tikz

  Terminal type is now 'tikz'
  Options are 'latex nopreamble color nostandalone nogparrows
  notikzarrows nogppoints picenvironment nooriginreset bitmap rgbimage
  noclip notightboundingbox noexternalimages '

Here's what I tried to do in Maxima (inspired by the file
share/draw/draw_gnuplot.dem):

  F(x,y)        := 2*x^2 - x*y - y^2;
  level(z)      := implicit(F(x,y)=z, x,-2,2, y,-2,2);
  clevel(clr,z) := [color=clr, level(z)];
  clevels       :  [clevel(red,   -2),
                    clevel(orange,-1),
                    clevel(green,  0),
                    clevel(blue,   2),
                    clevel(violet, 5)];
  draw2d(clevels);
  draw2d(file_name="/tmp/myplot", terminal=eps,  clevels);
  /* ^ These two "draw2d"s work as expected */

  draw2d(file_name="/tmp/myplot", terminal=tikz, clevels);
  /* ^ Fails with: "draw: illegal terminal specification: tikz" */

  set_plot_option ([gnuplot_term,     "tikz"]);
  set_plot_option ([gnuplot_out_file, "/tmp/myplot.tikz"]);
  draw2d(clevels);
  /* ^ The options are ignored */

  set_plot_option ([gnuplot_term,     "eps"]);
  set_plot_option ([gnuplot_out_file, "/tmp/myplot2.eps"]);
  draw2d(clevels);
  /* ^ The options are ignored */

I also tried to grep the source tree of Maxima for "tikz"
case-insensitively, and got no matches...

Thanks in advance!
  Eduardo Ochs
  http://angg.twu.net/eev-maxima.html