Support for 3d surface/mesh plots?

[asinghvi17]

Will there be any support for surface or mesh plots? How might this best be accomplished?

[mykelk]

Can you point us to an example in the PGF Manual of an example of what you would like? Typically, we use image plots or contour plots to represent scalar functions of two variables.

[asinghvi17]

An example:

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\usepgfplotslibrary{colormaps}
\pgfplotsset{compat = 1.16}

\begin{document}

\begin{tikzpicture}

\begin{axis}[
  xmin=-4,
  xmax=4,
  ymin=-4,
  ymax=4,
  colormap/viridis,
  colorbar,
  xlabel = {$x$},
  ylabel = {$y$},
  zlabel = {$z$},
  grid = major,
  view = {120}{30},
  ]
  \addplot3 [
  surf,
  shader=interp,
  domain=-4:4,
  domain y=-4:4,
  ] {(4 - x - 2*y)/3};

\end{axis}

\end{tikzpicture}
\end{document}

which generates this as output:

Basically, I would like 3d mesh/surf plots to be supported (I wasn't able to find any examples in the manual).

[mykelk]

Ah, okay. I think it would be fairly easy to add. Just create a mutable struct Surface in plots.jl with the relevant fields. Then add function plot(p::Surface) to PGFPlots.jl with implementation similar to that of Contour. Pull requests are welcome.