Mathieu aka @miniapeur posted another meme on X (Twitter). It contained a 3D plot of a wavy function. So I did a similar plot, but for roundness and rotational symmetry parametrized it differently so it won’t have these edgy corners.
For a function with rotation symmetry, using polar coordinates gives us smooth edges. We have a custom colormap for a blue gradient, and sorted depth buffering, with pgfplots and TikZ in LaTeX. https://t.co/Fb7wOQayul pic.twitter.com/xPhgfEzNRE
— LaTeX.org (@TeXgallery) February 8, 2025
\documentclass[border=10pt]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.18}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
axis equal image, ticks=none,
view={25}{25}, grid,
zmin = -3, zmax = 3,
domain = -pi:pi,
y domain = 0:23,
samples = 65,
samples y = 65,
colormap =
{bluewhite}{color(0cm) = (blue);
color(1cm) = (white)}]
\addplot3[surf, z buffer = sort,
trig format plots = rad]
( {y*sin(x) },
{y*cos(x) },
{ cos(y) } );
\end{axis}
\end{tikzpicture}
\end{document}