General Cylinder

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\documentclass{article}
\usepackage{tikz}
\usepackage{tikz-3dplot}
\usetikzlibrary{math}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\setlength\PreviewBorder{0.125pt}
%
% File name: general-cylinder.tex
% Description: 
% A geometric representation of a general cylinder is shown.
% 
% Date of creation: March, 7th, 2021.
% Date of last modification: October, 9th, 2022.
% Author: Efraín Soto Apolinar.
% https://www.aprendematematicas.org.mx/author/efrain-soto-apolinar/instructing-courses/
% Source: page 44 of the 
% Glosario Ilustrado de Matem\'aticas Escolares.
% https://tinyurl.com/5udm2ufy
%
% Terms of use:
% According to TikZ.net
% https://creativecommons.org/licenses/by-nc-sa/4.0/
% Your commitment to the terms of use is greatly appreciated.
%
\begin{document}
    %
    \tdplotsetmaincoords{60}{140}
    %
    \begin{tikzpicture}[tdplot_main_coords]
        \pgfmathsetmacro{\h}{3}
        \pgfmathsetmacro{\a}{3}
        \pgfmathsetmacro{\f}{1.0}
        \pgfmathsetmacro{\xi}{0.0}
        \pgfmathsetmacro{\xf}{2.0*pi}
        \pgfmathsetmacro{\step}{0.0025*(\xf-\xi)}
        \pgfmathsetmacro{\xs}{\xi+\step}
        \pgfmathsetmacro{\xa}{\xf-\step}
        % Coordinate axis
        \draw[thick,->] (-0.25,0,0) -- (\xf+0.5,0,0) node [below] {$x$};
        \draw[thick,->] (0,-0.25,0) -- (0,1.5,0) node [right] {$y$};
 
 
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