% latexmk -pdf tilt_axis.tex
% pdftoppm tilt_axis.pdf tilt_axis.png -png
\documentclass[border=3pt,tikz]{standalone}
\usepackage{physics}
\usepackage{tikz}
\usepackage{tikz-3dplot}
\usepackage[outline]{contour} % glow around text
\usepackage{xcolor}

\colorlet{veccol}{green!50!black}
\colorlet{projcol}{blue!70!black}
\colorlet{myblue}{blue!70!black}
\colorlet{mydarkblue}{blue!50!black}
\tikzset{>=latex} % for LaTeX arrow head
\tikzstyle{proj}=[projcol!80,line width=0.08] %very thin
\tikzstyle{area}=[draw=veccol,fill=veccol!80,fill opacity=0.6]
\tikzstyle{vector}=[->,veccol,thick]
\tikzstyle{darkvector}=[->,veccol!70!black,thick]
\usetikzlibrary{angles,quotes} % for pic (angle labels)
\contourlength{1.3pt}

\begin{document}


\tdplotsetmaincoords{60}{110}
\begin{tikzpicture}[scale=2,tdplot_main_coords]
  
  % VARIABLES
  \def\rvec{1}
  \def\thetavec{-20}
  \def\thetavecmax{-70}
  \def\phivec{-60}
  
  % AXES
  \coordinate (O) at (0,0,0);
  \draw[thick,->] (0,0,0) -- (-2.5,0,0) node[anchor=north west]{$x$};
  \draw[thick,->] (0,0,0) -- (0,1.7,0) node[anchor=north west]{$y$};
  \draw[thick,->] (0,0,0) -- (0,0,1.7) node[anchor=south]{$-z$};
  
  % VECTORS
  \tdplotsetcoord{P}{\rvec}{\thetavec}{\phivec}
  \draw[-stealth,red] (O)  -- (P) node[above right=-2] {$P_{0}$};
  \draw[dashed,red]   (O)  -- (Pxy);
  \draw[dashed,red]   (P)  -- (Pxy);
  
  \tdplotsetcoord{P}{\rvec}{\thetavecmax}{\phivec}
  \draw[-stealth,blue] (O)  -- (P) node[above right=-2] {$P_{1}$};
  \draw[dashed,blue]   (O)  -- (Pxy);
  \draw[dashed,blue]   (P)  -- (Pxy);
  
  % ARCS
  \tdplotdrawarc[->]{(O)}{-0.6}{0}{\phivec}
    {anchor=south}{$\alpha$}
  \tdplotsetthetaplanecoords{\phivec}
  \tdplotdrawarc[->,tdplot_rotated_coords,red]{(0,0,0)}{0.7}{0}{\thetavec}
    {anchor=south west}{\hspace{-2mm}$\theta_0$}

  \tdplotdrawarc[->,tdplot_rotated_coords,blue]{(0,0,0)}{0.3}{0}{\thetavecmax}
    {anchor=south west}{\hspace{-3.5mm}$\theta_1$}

	\node[draw=none] at (1,1) {\begin{tabular}{l}
		$\alpha$: tilt direction\\
		$\theta_{0}$: minimum tilt angle \\
		$\theta_{1}$: maximum tilt angle
	\end{tabular}};

\end{tikzpicture}

\end{document}