TikZ 图片中的垂直线

Question

如何在 (0,0) 处创建一条垂直线，让下图围绕它循环？

\documentclass{article}
\RequirePackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}[view={rad(60)}{rad(30)}, trig format=rad, title=all in radians,]
    \addplot3+ [domain=0:4*pi,samples=19,samples y=0]
    ({sin(x)},
    {cos(x)},
    {2*x/(4*pi)});
    \node [fill=white,draw=black,anchor=center] at
    ({sin(pi/2)},{cos(pi/2)},1) {X};
    \end{axis}
\end{tikzpicture}

\end{document}