From d74df94552dc1d71423d28b4ecfb954716d65901 Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Sun, 19 Jan 2020 03:00:48 +0000
Subject: CTAN sync 202001190300

---
 macros/latex/contrib/curve2e/curve2e.dtx | 1307 ++++--------------------------
 1 file changed, 140 insertions(+), 1167 deletions(-)

(limited to 'macros/latex/contrib/curve2e/curve2e.dtx')

diff --git a/macros/latex/contrib/curve2e/curve2e.dtx b/macros/latex/contrib/curve2e/curve2e.dtx
index 2bf4c5af2d..266ca29f25 100644
--- a/macros/latex/contrib/curve2e/curve2e.dtx
+++ b/macros/latex/contrib/curve2e/curve2e.dtx
@@ -13,12 +13,11 @@
 
 \postamble
 
-
 Distributable under the LaTeX Project Public License,
 version 1.3c or higher (your choice). The latest version of
 this license is at: http://www.latex-project.org/lppl.txt
 
-This work is "author-maintained"
+This work is "maintained"
 
 This work consists of file curve2e.dtx, and the derived files 
 curve2e.sty and curve2e.pdf, plus the auxiliary derived files 
@@ -47,7 +46,7 @@ README.txt and curve2e-v161.sty.
 %<+package>\ProvidesPackage{curve2e}%
 %<+readme>File README.txt for package curve2e
 %<*package|readme>
-        [2020-01-05 v.2.0.8 Extension package for pict2e]
+        [2020-01-18 v.2.2.0 Extension package for pict2e]
 %</package|readme>
 %<*driver>
 \documentclass{ltxdoc}\errorcontextlines=9
@@ -55,11 +54,11 @@ README.txt and curve2e-v161.sty.
 \usepackage[utf8]{inputenc}
 \usepackage{lmodern,textcomp}
 \usepackage{mflogo}
-\usepackage{multicol,amsmath,fancyvrb,graphics,trace}
+\usepackage{multicol,amsmath,fancyvrb,graphics,verbatim,trace}
 \usepackage{xcolor,curve2e}
 \GetFileInfo{curve2e.dtx}
 \title{The extension package \textsf{curve2e}}
-\author{Claudio Beccari\thanks{E-mail: \texttt{claudio dot beccari at gmai dot com}}}
+\author{Claudio Beccari\thanks{E-mail: \texttt{claudio dot beccari at gmail dot com}}}
 \date{Version \fileversion~--~Last revised \filedate.}
 \providecommand*\diff{\mathop{}\!\mathrm{d}}
 \renewcommand\meta[1]{{\normalfont\textlangle\textit{#1}\textrangle}}
@@ -79,10 +78,41 @@ README.txt and curve2e-v161.sty.
 \providecommand\Parg{}
 \renewcommand\Parg[1]{\texttt{(#1)}}
 
+\providecommand\Pbox{}
+\RenewDocumentCommand\Pbox{D(){0,0} O{cc} m O{0.5ex}}{%
+\put(#1){%
+\dimendef\Dim=2566\relax
+\settowidth\Dim{#2}%
+\edef\Rapp{\fpeval{\Dim/{1ex}}}%
+\fptest{\Rapp > 1.5}{\fboxsep=0.5ex}{\fboxsep=0.75ex}%
+\fboxrule=0pt
+\fptest{#4 = 0sp}{\makebox(0,0)[#2]{\fbox{$\relax#3\relax$}}}%
+{\edef\Diam{\fpeval{#4/\unitlength}}%
+\makebox(0,0){\circle*{\Diam}}%
+\makebox(0,0)[#2]{\fbox{$\relax\mathsf#3\relax$}}}%
+}\ignorespaces}
+
+\def\LissajousCoefs#1,#2,#3,#4,#5,#6!{%
+\edef\LAu{#1}\edef\LNu{#2}\edef\LFu{#3}%
+\edef\LAd{#4}\edef\LNd{#5}\edef\LFd{#6}}
+
+\def\LissajousCode#1#2{%
+\edef\X{\fpeval{\LAu*cosd(\LNu*#1+\LFu)}}%
+\edef\Y{\fpeval{\LAd*cosd(\LNd*#1+\LFd)}}%
+\CopyVect\X,\Y to#2\ignorespaces}
+
+\NewDocumentCommand\Lissajous{m o m}{%
+\IfValueTF{#2}{\LissajousCoefs#2!\relax
+\LissajousCode{#1}{#3}}%
+{\ifcsname LAu\endcsname
+\LissajousCode{#1}{#3}%
+\else\PackageError{Lissajous}%
+  {I parametri di questa curva di Lissajous\MessageBreak
+   Non sono mai stati definiti}{Non faccio nulla}\fi}%
+\ignorespaces}
+
 \makeatletter
 
-%\newcommand*\Pall[1][1.5]{\def\circdiam{#1}\@Pall}
-%   \def\@Pall(#1){\put(#1){\circle*{\circdiam}}}
 \NewDocumentCommand\Pall{O{1.5} R(){0,0}}{\put(#2){\circle*{#1}}}
 
 \def\legenda(#1)#2{\put(#1){\setbox3333\hbox{$#2$}%
@@ -98,8 +128,47 @@ README.txt and curve2e-v161.sty.
 \DeclareRobustCommand\setfontsize[2][1.2]{%
 \linespread{#1}\fontsize{#2}{#2}\selectfont}
 
+\newwrite\example@out
+\ProvideDocumentEnvironment{Esempio}{ O{\footnotesize} D(){0.50}}
+% All definitions and assignments are local
+% #1 := Lates font size command or  \setfontsize{<size>}
+% %2 := \textwidth percentage for the code box; the complement, less the
+%       column gap for the result dedicata al codice
+% Syntax: \begin{Esempio}[<>size command](<code box percentage width>)
+%
+{\par\addvspace{3.0ex plus 0.8ex minus 0.5ex}\vskip -\parskip
+%\def\Corpo{#1}
+\dimendef\Wboxu=2570 \dimendef\Wboxd=2572
+\Wboxu=#2\textwidth\relax
+\Wboxd=\dimexpr\linewidth-\columnsep-\Wboxu\relax
+\begingroup
+\@bsphack
+\immediate\openout\example@out\jobname-temp.tex
+\let\do\@makeother\dospecials\catcode`\^^M\active
+\def\verbatim@processline{%
+  \immediate\write\example@out{\the\verbatim@line}}%
+\verbatim@start\relax}%
+{\immediate\closeout\example@out\@esphack\endgroup
+\begin{lrbox}{0}%
+\begin{minipage}{\textwidth}%
+\begin{minipage}{\Wboxu}%
+#1\relax
+\verbatiminput{\jobname-temp.tex}
+\end{minipage}%
+\hfill
+\begin{minipage}{\Wboxd}\raggedleft
+\input{\jobname-temp}%
+\end{minipage}
+\end{minipage}%
+\end{lrbox}%
+
+\medskip
+\noindent\makebox[\textwidth]{\box0}%
+\par%\addvspace{3.0ex plus 0.8ex minus 0.5ex}\vskip -\parskip
+}
+
 
-\begin{document}
+\begin{document}\errorcontextlines=100
 \maketitle
 \columnseprule=0.4pt
 \begin{multicols}{2}
@@ -110,7 +179,7 @@ README.txt and curve2e-v161.sty.
 %</driver>
 % \fi
 %
-% \CheckSum{5600}
+% \CheckSum{5578}
 % \begin{abstract}
 % This file documents the |curve2e| extension package to  the |pict2e|
 % bundle implementation; the latter was described by Lamport
@@ -130,25 +199,9 @@ README.txt and curve2e-v161.sty.
 % of contributors.
 % \end{abstract}
 %
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%\section{The configuration file}
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% This package |curve2e| is distributed with a |ltxdoc.cfg| configuration
-% file that contains, besides the preamble and the postamble comment
-% lines, the following line of code:
-%\begin{verbatim}
-%\AtBeginDocument{\OnlyDescription}
-%\end{verbatim}
-%
-% If you want to type the whole documentation, comment out that code line
-% in the |ltxdoc.cfg| file. This is the only modification allowed by the
-% LPPL licence that does not require to change the file name.
-%
-% For your information, the initial part is about 20~pages long; the
-% whole documentation is about 80~pages long.
 %
 %^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% \section{Package \texttt{pict2e} and this extension \texttt{curve2e}}
+% \section{Introduction}
 %^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Package \texttt{pict2e} was announced in issue 15 of \texttt{latexnews}
@@ -359,7 +412,7 @@ README.txt and curve2e-v161.sty.
 % |\lineto|, |\curveto|, |\closepath|, |\fillpath|, and |\strokepath|;
 % of course these macros can be used by the end user, and sometimes they
 % perform better than the macros defined in this package, because the
-% user has a better control on the position of the Bézier splines
+% user has a better control on the position of eack Bézier-spline
 % control points, while here the control points are sort of rigid. It
 % would be very useful to resort to the |hobby| package, but its macros
 % are compatible with those of the |tikz| and |pgf| packages, not with
@@ -390,8 +443,8 @@ README.txt and curve2e-v161.sty.
 % \TeX\ and \LaTeX\ programmers, this version could become the start for
 % a real extension of the |pict2e| package or even become a part of
 % it. Actually some macros have already been included in the |pict2e|
-% package. The |\Curve| algorithm, as I said before, might be redefined
-% so as to use the macros  introduced in the |hobby| package, that
+% package. The |\Curve| algorithm, as said before, might be redefined
+% so as to use the macros  introduced by the |hobby| package, that
 % implements for the |tikz| and |pgf| packages the same functionalities
 % that John Hobby implemented for the \MF\ and \MP\ programs. 
 %
@@ -400,1089 +453,6 @@ README.txt and curve2e-v161.sty.
 % \texttt{pict2e}; they are the only ones who can decide whether or not
 % to incorporate new macros in their package.
 %
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% \section{Summary and examples of new commands}
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-% This package \texttt{curve2e} extends the power of \texttt{pict2e} with
-% the following modifications and the following new commands.
-% \begin{enumerate}
-% \item This package |curve2e| calls directly the \LaTeX\ packages
-% |color| and |pict2e| to which it passes any possible option that the
-% latter can receive; actually the only options that make sense for
-% |pict2e| are those concerning the arrow tips, either \LaTeX\ or
-% PostScript styled, because it is assumed that if you use this package
-% you are not interested in using the original \LaTeX\ commands. See the
-% |pict2e| documentation in order to see the correct options |pict2e|
-% can receive. If the user wants to use the |xcolor| package, it has to
-% load this one before |curve2e|.
-%^^A
-% \item The user is offered new commands in order to control the line
-% terminators and the line joins; specifically:
-% \begin{itemize}
-% \item |\roundcap|: the line is terminated with a semicircle;
-% \item |\squarecap|: the line is terminated with a half square;
-% \item |\roundjoin|: two lines are joined with a rounded join;
-% \item |\beveljoin|: two lines are joined with a bevel join;
-% \item |\miterjoin|: two lines are joined with a miter join.
-% \end{itemize}
-% All the above commands should respect the intended range; but since
-% they act at the PostScript or PDF level, not at \TeX\ level, it might
-% be necessary to issue the necessary command in order to restore the
-% previous terminator or join.
-%^^A
-% \item The commands |\linethickness|, |\thicklines|, |\thinlines|
-% together with |\defaultlinethickness| always redefine the internal
-% |\@wholewidth| and |\@halfwidth| so that the latter always refer to a
-% full width and to a half of it in this way: if you issue the command
-% |\defaultlinewidth{2pt}| all thin lines will be drawn with a thickness
-% of 1\,pt while, if a drawing command directly refers to the internal
-% value |\@wholewidth|, its line will be drawn with a thickness of 2\,pt.
-% If one issues the declaration |\thinlines| all lines will be drawn with
-% a  1\,pt width, but if a command refers to the internal value
-% |\@halfwidth| the line will be drawn with a thickness of 0.5\,pt. The
-% command |\linethickness| redefines the above internals but does not
-% change the default width value; all these width specifications apply to
-% all lines, straight ones, curved ones, circles, ovals, vectors, dashed,
-% et cetera. It's better to recall that |\thinlines| and |\thicklines|
-% are declarations that do not take arguments; on the opposite the other
-% two commands follow the standard syntax:
-% \begin{flushleft}
-% |\linethickness|\marg{dimensioned value}\\
-% |\defaultlinewidth|\marg{dimensioned value}
-% \end{flushleft}
-% where \meta{dimensioned value} means a length specification complete of
-% its units, or a dimensional expression.
-%^^A
-% \item Straight lines and vectors are redefined in such a way that
-% fractional slope coefficients may be specified; the zero length line
-% does not produce errors and is ignored; the zero length vectors draw
-% only the arrow tips. 
-%^^A
-% \item New line and vector macros are defined that avoid the necessity
-% of specifying the horizontal component; |\put(3,4){\LIne(25,15)}|
-% specifies a segment that starts at point $(3,4)$ and goes to point
-% $(3+25,4+15)$; the command |\segment(3,4)(28,19)| achieves the same
-% result without the need of using command |\put|.
-%
-% The same applies to the vector commands |\Vector| and |\VECTOR| and
-% |\VVECTOR|; the latter command behaves as |\VECTOR| but draws a vector
-% with arrow tips at both ends; furthermore this command is available
-% only with this new release of the |curve2e| package. 
-% Experience has shown that the commands intended to join two specified
-% points are particularly useful.
-%	\begin{figure}
-%	\begin{minipage}{.48\textwidth}
-%	\begin{verbatim}
-%	\unitlength=.5mm
-%	\begin{picture}(60,20)
-%	\GraphGrid(80,20)
-%	\put(0,0){\vector(1.5,2.3){10}}
-%	\put(20,0){\Vector(10,15.33333)}
-%	\VECTOR(40,0)(50,15.33333)
-%	\ifdefined\VVECTOR \VVECTOR(60,0)(80,10)\fi
-%	\end{picture}
-%	\end{verbatim}
-%	\end{minipage}
-%	\hfill
-%	\begin{minipage}{.48\textwidth}\centering
-%	\unitlength=.5mm
-%	\begin{picture}(60,20)
-%	\GraphGrid(80,20)
-%	\put(0,0){\vector(1.5,2.3){10}}
-%	\put(20,0){\Vector(10,15.33333)}
-%	\VECTOR(40,0)(50,15.33333)
-%	\ifdefined\VVECTOR \VVECTOR(60,0)(80,10)\fi
-%	\end{picture}
-%	\end{minipage}
-%  \caption{Three (displaced) identical vectors obtained with the three
-%           vector macros\ifdefined\VVECTOR; a double tipped vector is also shown\fi.}\label{fig:vectors}
-%	\end{figure}
-%^^A
-% \item The |\polyline| command has been introduced: it accepts an
-% unlimited list of  point coordinates enclosed within round parentheses;
-% the command draws a sequence of connected segments that join in order the
-% specified points; the syntax is:
-%	\begin{flushleft}
-%\cs{polyline}\oarg{optional join style}\parg{$P_1$}\parg{$P_2$}\texttt{...}\parg{$P_n$}
-%	\end{flushleft}
-% See figure~\ref{fig:polyline} where a regular pentagon is drawn; usage
-% of polar coordinates is also shown; please notice how relative polar
-% coordinates act in this figure.
-%
-%	\begin{figure}[!ht]
-%	\begin{minipage}{.48\linewidth}
-%	\begin{verbatim}
-%	\unitlength=.5mm
-%	\begin{picture}(40,32)(-20,-20)
-%	\polyline(90:20)(162:20)(234:20)(306:20)(378:20)(90:20)
-%	\end{picture}
-%	\end{verbatim}
-%	\end{minipage}
-%   \hfill
-%	\begin{minipage}{.48\linewidth}\raggedleft
-%   \unitlength=.5mm
-%	\begin{picture}(40,32)(-20,-20)
-%	\polyline(90:20)(162:20)(234:20)(306:20)(378:20)(90:20)
-%	\end{picture}\hspace*{2em}
-%	\end{minipage}
-%	\caption{Polygonal line obtained by means of the \texttt{\string\polyline}
-%   command; vertex coordinates are in polar form.}
-%	\label{fig:polyline}
-%	\end{figure}
-%
-% Examples of using polar and cartesian coordinates are shown in 
-% figure~\ref{fig:polar}.
-%
-%\begin{figure}[htb]\unitlength=0.01\textwidth
-%\begin{minipage}{0.55\textwidth}
-%\begin{verbatim}
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Zbox(40,0)[l]{40,0}[1]
-%\Zbox(90:30)[bc]{90{:}30}[1]
-%\Zbox(60:30)[bc]{60{:}30}[1]
-%\Zbox(30,30)[bc]{30,30}[1]
-%\multiput(0,0)(30:10){5}%
-%   {\makebox(0,0){\rule{1.5mm}{1.5mm}}}
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.4\textwidth}
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Zbox(40,0)[l]{40,0}[1]
-%\Zbox(90:30)[bc]{90{:}30}[1]
-%\Zbox(60:30)[bc]{60{:}30}[1]
-%\Zbox(30,30)[bc]{30,30}[1]
-%\multiput(0,0)(30:10){5}{\makebox(0,0){\rule{1.5mm}{1.5mm}}}
-%\end{picture}
-%\end{minipage}
-%\caption[Use of cartesian and absolute polar coordinates]{Use of
-% cartesian and absolute polar coordinates. The \texttt{\string\Zbox}
-% macro is just a shortcut to set a small dot with a (math) legend close
-% to it; its definition by means of the \texttt{xparse} functionalities
-% is straightforward.}
-%\label{fig:polar}
-%\end{figure}
-%
-% A similar example may be obtained with the |\polygon| macro that does
-% not require to terminate the polyline at the starting point.
-% Figure~\ref{fig:polygon} shows how to get a coloured filled pentagon.
-%
-%	\begin{figure}[!ht]
-%	\begin{minipage}{.48\linewidth}
-%	\begin{verbatim}
-%	\unitlength=.5mm
-%	\begin{picture}(40,32)(-20,-20)
-%	\color{magenta}
-%	\polygon*(90:20)(162:20)(234:20)(306:20)(378:20)
-%	\end{picture}
-%	\end{verbatim}
-%	\end{minipage}
-%   \hfill
-%	\begin{minipage}{.48\linewidth}\raggedleft
-%   \unitlength=.5mm
-%	\begin{picture}(40,32)(-20,-20)
-%	\color{magenta}
-%	\polygon*(90:20)(162:20)(234:20)(306:20)(378:20)
-%	\end{picture}\hspace*{2em}
-%	\end{minipage}
-%	\caption{A pentagon obtained by means of the \texttt{\string\polygon*}
-%   command; vertex coordinates are in relative polar form.}
-%	\label{fig:polygon}
-%	\end{figure}
-%
-% \item The new command |\Dashline| (alias: |\Dline| for backwards
-% compatibility)
-% \begin{flushleft}
-% |\Dashline|\parg{first point}\parg{second point}\marg{dash length}
-% \end{flushleft}
-% draws a dashed line containing as many dashes as possible, just as long
-% as specified, and separated by a gap exactly the same size; actually,
-% in order to make an even gap-dash sequence, the desired dash length is
-% used to do some computations in order to find a suitable length, close
-% to the one specified, such that the distance of the end points is
-% evenly divided in equally sized dashes and gaps.
-% The end points may be anywhere in the drawing area, without any
-% constraint on the slope of the joining segment. The desired dash length
-% is specified as a fractional multiple of |\unitlength|; see
-% figure~\ref{fig:dashline}.
-%	\begin{figure}[!ht]
-%	\begin{minipage}{.48\textwidth}
-%	\begin{verbatim}
-%	\unitlength=1mm
-%	\begin{picture}(40,40)
-%	\GraphGrid(40,40)
-%	\Dashline(0,0)(40,10){4}
-%	\put(0,0){\circle*{2}}
-%	\Dashline(40,10)(0,25){4}
-%	\put(40,10){\circle*{2}}
-%	\Dashline(0,25)(20,40){4}
-%	\put(0,25){\circle*{2}}
-%	\put(20,40){\circle*{2}}
-%	\Dotline(0,0)(40,40){2}
-% \put(40,40){\circle*{2}}
-%	\end{picture}
-%	\end{verbatim}
-%	\end{minipage}
-%	\hfill
-%	\begin{minipage}{.48\textwidth}\centering
-%	\unitlength=1mm
-%	\begin{picture}(40,40)
-%	\GraphGrid(40,40)
-%	\Dashline(0,0)(40,10){4}
-%	\put(0,0){\circle*{2}}
-%	\Dashline(40,10)(0,25){4}
-%	\put(40,10){\circle*{2}}
-%	\Dashline(0,25)(20,40){4}
-%	\put(0,25){\circle*{2}}
-%	\put(20,40){\circle*{2}}
-% \Dotline(0,0)(40,40){2}
-% \put(40,40){\circle*{2}}
-%	\end{picture}
-%	\end{minipage}
-%	\caption{Dashed lines and graph grid}\label{fig:dashline}
-%	\end{figure}
-%
-% Another example of usage of cartesian and polar coordinates usage is 
-% shown in figure~\ref{fig:polar} together with its code.
-% 
-%\begin{figure}\unitlength=0.007\textwidth
-%\begin{minipage}{0.55\textwidth}
-%\begin{verbatim}
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Dashline(0,0)(40,10){2}\Dashline(0,0)(40,20){2}
-%\Dashline(0,0)(40,30){2}\Dashline(0,0)(30,30){2}
-%\Dashline(0,0)(20,30){2}\Dashline(0,0)(10,30){2}
-%{\color{blue}%
-%\Dashline(40,0)(108:30){2}
-%\Dashline(40,0)(126:30){2}
-%\Dashline(40,0)(144:30){2}
-%\Dashline(40,0)(162:30){2}}
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.4\textwidth}\raggedleft
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Dashline(0,0)(40,10){2}
-%\Dashline(0,0)(40,20){2}
-%\Dashline(0,0)(40,30){2}
-%\Dashline(0,0)(30,30){2}
-%\Dashline(0,0)(20,30){2}
-%\Dashline(0,0)(10,30){2}
-%{\color{blue}%
-%\Dashline(40,0)(108:30){2}
-%\Dashline(40,0)(126:30){2}
-%\Dashline(40,0)(144:30){2}
-%\Dashline(40,0)(162:30){2}}%
-%\end{picture}
-%\end{minipage}
-%\caption{Different length dashed lines with the same nominal dash
-% length; notice the relative polar coordinates used for the dashed
-% lines starting at the grid lower right vertex.}
-%\label{fig:dashedlines}
-%\end{figure}
-%
-% Another
-%^^A
-%\item Analogous to |\Dashline|, a new command |\Dotline| draws a dotted
-% line with the syntax:
-% \begin{flushleft}
-% |\Dotline|\parg{first point}\parg{end point}\marg{dot gap}
-% \end{flushleft}
-% See figures~\ref{fig:dashline} and~\ref{fig:dottedlines} for examples.
-%
-%\begin{figure}[htb]\unitlength=0.007\textwidth
-%\begin{minipage}{0.55\textwidth}
-%\begin{verbatim}
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Dotline(0,0)(40,10){1.5}\Dotline(0,0)(40,20){1.5}
-%\Dotline(0,0)(40,30){1.5}\Dotline(0,0)(30,30){1.5}
-%\Dotline(0,0)(20,30){1.5}\Dotline(0,0)(10,30){1.5}
-%{\color{red}\Dotline(40,0)(108:30){1.5}
-%\Dotline(40,0)(126:30){1.5}
-%\Dotline(40,0)(144:30){1.5}
-%\Dotline(40,0)(162:30){1.5}}%
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.4\textwidth}\raggedleft
-%\begin{picture}(40,30)
-%\GraphGrid(40,30)
-%\Dotline(0,0)(40,10){1.5}
-%\Dotline(0,0)(40,20){1.5}
-%\Dotline(0,0)(40,30){1.5}
-%\Dotline(0,0)(30,30){1.5}
-%\Dotline(0,0)(20,30){1.5}
-%\Dotline(0,0)(10,30){1.5}
-%{\color{red}%
-%\Dotline(40,0)(108:30){1.5}
-%\Dotline(40,0)(126:30){1.5}
-%\Dotline(40,0)(144:30){1.5}
-%\Dotline(40,0)(162:30){1.5}}%
-%\end{picture}
-%\end{minipage}
-%\caption{Different length dotted lines with the same nominal dot gap;
-% again notice the relative polar coordinates for the dotted lines
-% starting at the grid lower right vertex.}
-%\label{fig:dottedlines}
-%\end{figure}
-%^^A
-% \item |\GraphGrid| is a command that draws a red grid under the drawing 
-% with lines separated |10\unitlength|s apart; it is described only with
-% a comma separated couple of numbers, representing the base and the
-% height of the grid, see figure~\ref{fig:dashline}; it's better to
-% specify multiples of ten and the grid can be placed anywhere in the
-% drawing canvas by means of |\put|, whose cartesian coordinates are
-% multiples of 10; nevertheless the grid line distance is rounded to the
-% nearest multiple of 10, while the point coordinates specified to |\put|
-% are not rounded at all; therefore some care should be used to place the
-% working grid on the drawing canvas. This grid is intended as an aid
-% while drawing; even if you sketch your drawing on millimetre paper, the
-% drawing grid turns out to be very useful; one must only delete or
-% comment out the command when the drawing is finished. Several examples
-% of usage of such grid are shown in several figures.
-%^^A
-% \item New trigonometric function macros have been  computed by means of
-% the functionalities of the |xfp| package. The difference woth the other
-% existing macros is that angles are specified in sexagesimal degrees, so
-% that the users need not transform to radians. The computations are done
-% taking into account that “abnormal” values can occasionally be avoided,
-% for example $\tan90^\circ$ must be avoided and replaced with a suitably
-% large number, because the TeX\ system does not handle “infinity”.
-%
-% These trigonometric functions are used within the complex number
-% macros; but if the user wants to use them the syntax is the following:
-%\begin{flushleft}
-%      \cs{SinOf}\meta{angle}\texttt{to}\meta{control sequence}\\
-%      \cs{CosOf}\meta{angle}\texttt{to}\meta{control sequence}\\
-%      \cs{TanOf}\meta{angle}\texttt{to}\meta{control sequence}
-%\end{flushleft}
-% The \meta{control sequence} may then be used, for example, as a
-% multiplying factor of a length.
-% 
-%^^A
-% \item Arcs can be drawn as simple circular arcs, or with one or two
-% arrows at their ends (curved vectors);  the syntax is:
-%\begin{flushleft}
-% \cs{Arc}\parg{center}\parg{starting point}\marg{angle}\\
-% \cs{VectorArc}\parg{center}\parg{starting point}\marg{angle}\\
-% \cs{VectorARC}\parg{center}\parg{starting point}\marg{angle}\\
-%\end{flushleft}
-% If the angle is specified numerically it must be enclosed in braces,
-% while if it is specified with a control sequence the braces (curly
-% brackets) are not necessary. The above macro |\Arc| draws a simple
-% circular arc without arrows; |\VectorArc| draws an arc with an arrow
-% tip at the ending point; |\VectorARC| draws an arc with arrow tips at
-% both ends; see figure~\ref{fig:arcs}.
-%	\begin{figure}
-%	\begin{minipage}{.48\textwidth}
-%	\begin{verbatim}
-%	\unitlength=0.5mm
-%	\begin{picture}(60,40)
-%	\GraphGrid(60,40)
-%	\Arc(0,20)(30,0){60}
-%	\VECTOR(0,20)(30,0)\VECTOR(0,20)(32.5,36)
-%	\VectorArc(0,20)(15,10){60}
-%	\put(20,20){\makebox(0,0)[l]{$60^\circ$}}
-%	\VectorARC(60,20)(60,0){-180}
-%	\end{picture}
-%	\end{verbatim}
-%	\end{minipage}
-%	\hfill
-%	\begin{minipage}{.48\textwidth}\centering
-%	\unitlength=0.5mm
-%	\begin{picture}(60,40)
-%	\GraphGrid(60,40)
-%	\Arc(0,20)(30,0){60}
-%	\VECTOR(0,20)(30,0)\VECTOR(0,20)(32.5,36)
-%	\VectorArc(0,20)(15,10){60}
-%	\put(20,20){\makebox(0,0)[l]{$60^\circ$}}
-%	\VectorARC(60,20)(60,0){-180}
-%	\end{picture}
-%	\end{minipage}
-%	\caption{Arcs and curved vectors}\label{fig:arcs}
-%	\end{figure}
-%^^A
-% \item A multitude of commands have been defined in order to manage
-% complex numbers; actually complex numbers are represented as a comma
-% separated pair of fractional numbers (here we use only cartesian
-% coordinates). They are used to address specific points in the drawing
-% plane, but also as operators so as to scale and rotate other objects.
-% In the following \meta{vector} means a comma separated pair of
-% fractional numbers, \meta{vector macro} means a macro that contains a
-% comma separated pair of fractional numbers; \meta{angle macro} means a
-% macro that contains the angle of a vector in sexagesimal degrees;
-% \meta{argument} means a brace delimited numeric value, even a macro;
-% \meta{numeric macro} means a macro that contains a fractional number;
-% \textit{macro} is a valid macro name, i.e.~a backslash followed by
-% letters, or anything else that can receive a definition. A
-% \emph{direction} of a vector is its versor; the angle of a vector is
-% the angle between the vector and the positive $x$ axis in
-% counterclockwise direction, as it is used in the
-% Euler formula $ \vec{v} = Me^{\mathrm{j}\varphi}$.
-%
-% {\footnotesize\begin{itemize}
-% \item |\MakeVectorFrom|\meta{numeric macro}\meta{numeric macro}|to|\meta{vector macro}
-% \item |\CopyVect|\meta{first vector}|to|\meta{second vector macro}
-% \item |\ModOfVect|\meta{vector}|to|\meta{modulus macro}
-% \item |\DirOfvect|\meta{vector}|to|\meta{versor macro}
-% \item |\ModAndDirOfVect|\meta{vector}|to|\meta{modulus macro}|and|\meta{versor macro}
-% \item |\ModAndAngleOfVect|\meta{vector}|to|\meta{modulus macro}|and|\meta{angle macro}
-% \item |\DistanceAndDirOfVect|\meta{1st vector}|minus|\meta{2nd vector}|to|\meta{distance macro}|and|\meta{versor macro}
-% \item |\XpartOfVect|\meta{vector}|to|\meta{macro}
-% \item |\YpartOfVect|\meta{vector}|to|\meta{macro}
-% \item |\DirFromAngle|\meta{angle}|to|\meta{versor macro}
-% \item |\ArgOfVect|\meta{vector}|to|\meta{angle macro}
-% \item |\ScaleVect|\meta{vector}|by|\meta{scaling factor}|to|\meta{vector macro}
-% \item |\ConjVect|\meta{vector}|to|\meta{conjugate vector macro}
-% \item |\SubVect|\meta{subtrahend vector}|from|\meta{minuend vector}|to|\meta{vector macro}
-% \item |\AddVect|\meta{first vector}|and|\meta{second vector}|to|\meta{vector macro}
-% \item |\Multvect|\marg{first vector}*\marg{second vector}*\marg{vector macro} (the asterisks are optional; either one changes the second vector into its complex conjugate)
-% \item |\MultVect|\meta{first vector}|by|\meta{second vector}|to|\meta{vector macro} (discouraged; maintained for backwards compatibility)
-% \item |\MultVect|\meta{first vector}|by*|\meta{second vector}|to|\meta{vector macro} (discouraged; maintained for backwards compatibility)
-% \item |\Divvect|\marg{dividend vector}\marg{divisor vector}\marg{ vector macro}
-% \item |\DivVect|\meta{dividend vector}|by|\meta{divisor vector}|to|\meta{vector macro} (maintained for backwards compatibility)
-% \end{itemize}}
-%^^A
-% \item General curves can be drawn with the |pict2e| macro |\curve| but
-% it requires the specification of the third-order Bézier-spline control
-% points; sometimes it's better to be very specific with the control
-% points and there is no other means to do a decent graph; sometimes the
-% curves to be drawn are not so tricky and a general set of macros can be
-% defined so as to compute the control points, while letting the user
-% specify only the nodes through which the curve must pass, and the
-% tangent direction of the curve in such nodes. Such commands are the
-% following:
-%\begin{itemize}
-%
-%\item \cs{Curve} to draw a sequence of arcs as explained above, using
-% third order (cubic) Bézier splines. The starred version of this command
-% fills the internal part of the curve with the current color; if the
-% last arc finishes where the fist arc starts, it is clear what is the
-% interior; if it does not, the driver  (not the code of this package,
-% but the driver between this code and the physical representation on
-% paper or screen) assumes a straight line closure of the whole path.
-%
-%\item \cs{Qurve} similar to |\Curve|, but with second order (quadratic)
-% Bézier splines. The starred version fills the interior with the current
-% color.
-%
-%\item \cs{CurveBetween} draws a single cubic Bézier spline between two
-% given nodes and with two given directions vectors.
-%
-%\item \cs{CBezierBetween}  draws a single cubic Bézier spline between
-% two given nodes, with two given directions versors along which the
-% control node distances are specified. This is the most general macro
-% (rather difficult to use) with which not only the arc end points are
-% specified but also the control nodes coordinates are given.
-%
-%\end{itemize}
-%
-% The main macro is |\Curve| and must be followed by an “unlimited”
-% sequence of node-direction coordinates as a quadruple
-% defined as
-%\[
-% \parg{node coordinates}\aarg{direction vector}
-%\]
-% Possibly if a sudden change of direction has to be performed (cusp)
-% another item can be inserted after one of those quadruples in the form
-%\[
-% \mbox{\dots\parg{...}\aarg{...}\oarg{new direction vector}\parg{...}\aarg{...}\dots}
-%\]
-%
-% Possibly it is necessary to specify the “tension” or the “looseness”
-% of a specific Bézier arc; such tension parameters range from 0 (zero)
-% to~4; the zero value implies a very stiff arc, as if it was a string
-% subject to a high tension (i.e. with zero looseness); a value of~4
-% implies a very low tension (very high looseness), almost as if the
-% string was not subject to any tension. In \MF\ or \MP\ language such a
-% concept is used very often; in this package, where the Hobby
-% algorithms are not used, the parameter value appears to mean the
-% opposite of tension.
-% A couple of comma separated tension values may be optionally used, they
-% are separated with a semicolon form the direction vector,
-% and they apply to the arc terminating with the last node; their
-% specification  must precede any possible change of tangent according to
-% this syntax\footnote{The tension may be specified only for cubic
-% splines, because the quadratic ones do not use enough parameters to
-% control the tension; not all commands for drawing cubic splines accept
-% this optional tension specification.}:
-%\[
-%\mbox{\dots\parg{...}\aarg{\upshape{\em direction vector}\texttt{;}{\em start tension}|,|{\em end tension}}\parg{...}\aarg{...}\dots}
-%\]
-%
-% The |\Curve| macro does not (still) have facilities for cycling the
-% path, that is to close the path from the last specified node-direction
-% to the first specified node-direction; but, as already mentioned, if
-% the ending node of the last arc does not coincide with the starting
-% node of the first arc, a straight line is assumed to join such nodes;
-% this line does not get drawn, but with starred commands no lines are
-% drawn because only the interior is coloured.
-% The tangent direction need not be specified with a unit vector,
-% although only its direction is relevant; the scaling of the specified
-% direction vector to a unit vector is performed by the macro itself.
-% Therefore one cannot specify the fine tuning of the curve convexity as
-% it can be done with other programs or commands, as, for example, with
-% \MF\  or the |pgf/tikz| package and environment. See figure~\ref{fig:curve} for
-% an example.
-%	\begin{figure}[htb]
-%	\begin{minipage}{.48\textwidth}
-%   \begin{verbatim}
-%	\unitlength=8mm\relax
-%	\begin{picture}(5,5)
-%	\put(0,0){\framebox(5,5){}}\thicklines\roundcap
-%	\Curve(2.5,0)<1,1>(5,3.5)<0,1>%
-%	  (4,5)<-1,0>(2.5,3.5)<-.5,-1.2>[-.5,1.2]%
-%	  (1,5)<-1,0>(0,3.5)<0,-1>(2.5,0)<1,-1>
-%	\end{picture}
-%   \end{verbatim}
-%	\end{minipage}
-%	\hfill
-%	\begin{minipage}{.48\textwidth}\raggedleft\relax
-%	\unitlength=8mm\relax
-%	\begin{picture}(5,5)
-%	\put(0,0.5){\put(0,0){\framebox(5,5){}}\thicklines\roundcap
-%	\Curve(2.5,0)<1,1>(5,3.5)<0,1>(4,5)<-1,0>(2.5,3.5)<-0.5,-1.2>[-0.5,1.2](1,5)<-1,0>(0,3.5)<0,-1>(2.5,0)<1,-1>}
-%	\end{picture}
-%	\end{minipage}
-%	\caption{A heart shaped curve with cusps drawn with \texttt{\string\Curve}}
-%	\label{fig:curve}
-
-%\vspace*{2\baselineskip}
-%
-%	\begin{minipage}{.48\textwidth}
-%   \begin{verbatim}
-%	\unitlength=8mm\relax
-%	\begin{picture}(5,5)
-%	\put(0,0){\framebox(5,5){}}\thicklines\roundcap
-%   \color{green}\relax
-%	\Curve*(2.5,0)<1,1>(5,3.5)<0,1>%
-%	  (4,5)<-1,0>(2.5,3.5)<-.5,-1.2>[-.5,1.2]%
-%	  (1,5)<-1,0>(0,3.5)<0,-1>(2.5,0)<1,-1>
-%	\end{picture}
-%   \end{verbatim}
-%	\end{minipage}
-%	\hfill
-%	\begin{minipage}{.48\textwidth}\raggedleft\relax
-%	\unitlength=8mm\relax
-%	\begin{picture}(5,5)
-%	\put(0,0.5){\put(0,0){\framebox(5,5){}}\thicklines\roundcap
-%   \color{green}\relax
-%	\Curve*(2.5,0)<1,1>(5,3.5)<0,1>(4,5)<-1,0>(2.5,3.5)<-0.5,-1.2>[-0.5,1.2](1,5)<-1,0>(0,3.5)<0,-1>(2.5,0)<1,-1>}
-%	\end{picture}
-%	\end{minipage}
-%\caption{Coloring the inside of a closed path drawn with \texttt{\string\Curve*}}
-%\label{fig:colored-curve}
-
-%	\end{figure}
-%
-% With the starred version of |\Curve|, instead of stroking the contour,
-% the macro fills up the contour with the selected current color,
-% figure~\ref{fig:colored-curve}.
-%
-% Figure~\ref{fig:arcspline} shows a geometric construction that
-% contains the geometric elements and symbols used to determine the
-% parameters of a cubic spline required to draw a quarter circle. This
-% construction contains many of the commands described so far.
-%
-%\begin{figure}[p]
-%\begin{minipage}{\linewidth}\small
-%\begin{verbatim}
-%\unitlength=0.007\textwidth
-%\begin{picture}(100,90)(-50,-50)
-%\put(-50,0){\vector(1,0){100}}\put(50,1){\makebox(0,0)[br]{$x$}}%
-%\put(20,-1){\makebox(0,0)[t]{$s$}}%
-%\put(0,0){\circle*{2}}\put(-1,-1){\makebox(0,0)[tr]{$M$}}%
-%\legenda(12,-45){s=\overline{MP_2}=R\sin\theta}%
-%\put(0,-50){\vector(0,1){90}}%
-%\put(1,40){\makebox(0,0)[tl]{$y$}}%
-%\put(0,-40){\circle*{2}}\put(1,-41){\makebox(0,0)[lt]{$C$}}%
-%\segment(0,-40)(-40,0)\segment(0,-40)(40,0)%
-%\put(-41,1){\makebox(0,0)[br]{$P_1$}}\put(-40,0){\circle*{2}}%
-%\put(41,1){\makebox(0,0)[bl]{$P_2$}}\put(40,0){\circle*{2}}%
-%\put(0,0){\linethickness{1pt}\Arc(0,-40)(40,0){90}}%
-%\segment(-40,0)(-20,20)\put(-20,20){\circle*{2}}%
-%\put(-20,21.5){\makebox(0,0)[b]{$C_1$}}%
-%\segment(40,0)(20,20)\put(20,20){\circle*{2}}%
-%\put(20,21.5){\makebox(0,0)[b]{$C_2$}}%
-%\put(0,-40){\put(0,56.5685){\circle*{2}}%
-%\put(1,58){\makebox(0,0)[bl]{$P$}}}%
-%\VectorARC(0,-40)(15,-25){45}\put(10,-18){\makebox(0,0)[c]{$\theta$}}%
-%\VectorARC(40,0)(20,0){-45}\put(19,5){\makebox(0,0)[r]{$\theta$}}%
-%\VectorARC(-40,0)(-20,0){45}\put(-19,5){\makebox(0,0)[l]{$\theta$}}%
-%\put(-20,-18){\makebox(0,0)[bl]{$R$}}%
-%\put(-32,13){\makebox(0,0)[bl]{$K$}}%
-%\put(32,13){\makebox(0,0)[br]{$K$}}%
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}\vspace{\stretch{1}}
-%
-%\begin{minipage}{\linewidth}\centering
-%\unitlength=0.007\textwidth
-%\begin{picture}(100,90)(-50,-50)
-%\put(-50,0){\vector(1,0){100}}\put(50,1){\makebox(0,0)[br]{$x$}}%
-%\put(20,-1){\makebox(0,0)[t]{$s$}}%
-%\put(0,0){\circle*{2}}\put(-1,-1){\makebox(0,0)[tr]{$M$}}%
-%\legenda(12,-45){s=\overline{MP_2}=R\sin\theta}%
-%\put(0,-50){\vector(0,1){90}}%
-%\put(1,40){\makebox(0,0)[tl]{$y$}}%
-%\put(0,-40){\circle*{2}}\put(1,-41){\makebox(0,0)[lt]{$C$}}%
-%\segment(0,-40)(-40,0)\segment(0,-40)(40,0)%
-%\put(-41,1){\makebox(0,0)[br]{$P_1$}}\put(-40,0){\circle*{2}}%
-%\put(41,1){\makebox(0,0)[bl]{$P_2$}}\put(40,0){\circle*{2}}%
-%\put(0,0){\linethickness{1pt}\Arc(0,-40)(40,0){90}}%
-%\segment(-40,0)(-20,20)\put(-20,20){\circle*{2}}%
-%\put(-20,21.5){\makebox(0,0)[b]{$C_1$}}%
-%\segment(40,0)(20,20)\put(20,20){\circle*{2}}%
-%\put(20,21.5){\makebox(0,0)[b]{$C_2$}}%
-%\put(0,-40){\put(0,56.5685){\circle*{2}}%
-%\put(1,58){\makebox(0,0)[bl]{$P$}}}%
-%\VectorARC(0,-40)(15,-25){45}\put(10,-18){\makebox(0,0)[c]{$\theta$}}%
-%\VectorARC(40,0)(20,0){-45}\put(19,5){\makebox(0,0)[r]{$\theta$}}%
-%\VectorARC(-40,0)(-20,0){45}\put(-19,5){\makebox(0,0)[l]{$\theta$}}%
-%\put(-20,-18){\makebox(0,0)[bl]{$R$}}%
-%\put(-32,13){\makebox(0,0)[bl]{$K$}}%
-%\put(32,13){\makebox(0,0)[br]{$K$}}%
-%\end{picture}
-%\end{minipage}
-%\caption{The code to display the nodes and control points for an arc to
-% be approximated with a cubic Bézier spline}
-%\label{fig:arcspline}
-%\end{figure}
-%
-%
-% To show what you can do with |\CurveBetween| see the code and result
-% shown in figure~\ref{fig:curva-due-punti}. Notice the effect of
-% changing the directions at both or a the end nodes of a single cubic
-% spline. The directions are conveniently expressed with unit vectors
-% described by polar coordinates.
-
-%\begin{figure}\centering\unitlength=0.004\textwidth
-%\begin{picture}(220,120)(-50,-20)
-%\put(0,60){\Line(-50,0)(50,0)
-%\CurveBetween-50,0and50,0WithDirs15:1and{-15:1}
-%\CurveBetween-50,0and50,0WithDirs30:1and{-30:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-45:1}
-%\CurveBetween-50,0and50,0WithDirs60:1and{-60:1}
-%\CurveBetween-50,0and50,0WithDirs75:1and{-75:1}
-%\CurveBetween-50,0and50,0WithDirs90:1and{-90:1}}
-%\put(120,60){%
-%\Line(-50,0)(50,0)
-%\CurveBetween-50,0and50,0WithDirs15:1and{15:1}
-%\CurveBetween-50,0and50,0WithDirs30:1and{30:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{45:1}
-%\CurveBetween-50,0and50,0WithDirs60:1and{60:1}
-%\CurveBetween-50,0and50,0WithDirs75:1and{75:1}
-%\CurveBetween-50,0and50,0WithDirs90:1and{90:1}}
-%\put(0,0){%
-%\Line(-50,0)(50,0)
-%\CurveBetween-50,0and50,0WithDirs45:1and{-15:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-30:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-45:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-60:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-75:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{-90:1}}
-%\put(120,0){%
-%\Line(-50,0)(50,0)
-%\CurveBetween-50,0and50,0WithDirs45:1and{15:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{30:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{45:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{60:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{75:1}
-%\CurveBetween-50,0and50,0WithDirs45:1and{90:1}}
-%\end{picture}
-%\caption{Curves between two points with different start and end slopes}\label{fig:curva-due-punti}
-%\end{figure}
-%
-% A little more complicated is the use of the |\CBezierBetween| macro,
-% figure~\ref{fig:Cbezier}. The directions are specified with unit
-% vectors in polar form; the control points are specified by adding their
-% distances from their neighbouring nodes; actually the right distance
-% is maintained to the value~1, while the left one increases from~4
-% to~10.
-% The black line corresponds to the standard |\CurveBetween| where the
-% default distance is computed to trace an arc of a circle and
-% is approximately~3.5. 
-%
-%\begin{figure}[!tb]
-%\begin{minipage}[t]{0.52\textwidth}
-%\begin{verbatim}
-%\unitlength=0.1\textwidth
-%\begin{picture}(10,3)
-%\CurveBetween0,0and10,0WithDirs1,1and{1,-1}
-%\color{red}%
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists4And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists6And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists8And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists10And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists12And{1}
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.40\textwidth}\raggedleft
-%\unitlength=0.1\textwidth
-%\begin{picture}(10,3)(0,1.25)
-%\CurveBetween0,0and10,0WithDirs1,1and{1,-1}
-%\color{red}%
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists4And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists6And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists8And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists10And{1}
-%\CbezierBetween0,0And10,0 WithDirs45:1And-45:1UsingDists12And{1}
-%\end{picture}
-%\end{minipage}
-%\caption{Comparison between similar arcs drawn with \cs{CurveBetween} (black)
-% and \cs{CbezierTo} (red)}
-%\label{fig:Cbezier}
-%\end{figure}
-%
-% In figure~\ref{fig:tensions} the effect of tension specification is
-% shown. The red line corresponds to the default tension, since the
-% tension values are not specified. The black lines correspond to the
-% various values used in the various commands to the |\Curve| macro.
-% With a tension of zero, the spline is almost coincident with the
-% horizontal base line of the frame. Increasing the parameter value
-% to~4.5, the curved becomes taller and taller, until it wraps itself
-% displaying an evident loop. We would say that the value of ~2 is a
-% reasonable  maximum  and  increasing that value is just to
-% obtain special effects.
-%
-%\begin{figure}[!htb]\centering
-%\begin{minipage}{0.48\textwidth}\small
-%\begin{verbatim}
-%\raggedleft\unitlength=0.01\textwidth
-%\begin{picture}(70,70)
-%\put(0,0){\color{blue}\frame(70,70){}}
-%\put(0,0){\color{red}\Curve(0,0)<1,1>(70,0)<1,-1>}
-%\Curve(0,0)<1,1>(70,0)<1,-1;0,0>
-%\Curve(0,0)<1,1>(70,0)<1,-1;0.2,0.2>
-%\Curve(0,0)<1,1>(70,0)<1,-1;2,2>
-%\Curve(0,0)<1,1>(70,0)<1,-1;4.5,4.5>
-%\Curve(0,0)<1,1>(70,0)<1,-1;0,3>
-%\Curve(0,0)<1,1>(70,0)<1,-1;3,0>
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.46\textwidth}
-%\raggedleft\unitlength=0.01\textwidth
-%\begin{picture}(70,70)
-%\put(0,0){\color{blue}\framebox(70,70){}}
-%\put(0,0){\color{red}\Curve(0,0)<1,1>(70,0)<1,-1>}
-%\Curve(0,0)<1,1>(70,0)<1,-1;0,0>
-%\Curve(0,0)<1,1>(70,0)<1,-1;0.2,0.2>
-%\Curve(0,0)<1,1>(70,0)<1,-1;2,2>
-%\Curve(0,0)<1,1>(70,0)<1,-1;4.5,4.5>
-%\Curve(0,0)<1,1>(70,0)<1,-1;0,3>
-%\Curve(0,0)<1,1>(70,0)<1,-1;3,0>
-%\end{picture}
-%\end{minipage}
-%\caption{The effects of tension factors}\label{fig:tensions}
-%\end{figure}
-%
-% Figure~\ref{fig:sinewave} displays two approximations of a sine wave;
-% Bézier splines can approximate transcendental curves, but the
-% approximation may be a poor one, depending on the approximated curve,
-% when few arcs are used to draw it. With arcs specified with more
-% complicated macros the approximation is better even with a lower number
-% of arcs.  With many arcs it is possible to approximate almost anything.
-% On the left side a modest approximation is obtained with just three
-% standard arcs obtained with |\Curve| and four node specifications;
-% on the right we have just two arcs created with |CBezierBetween| 
-% with tension specification and control point distances; this drawing 
-% is almost undistinguishable from a real sinusoid.
-%
-%\begin{figure}[!htb]
-%\begin{minipage}{\linewidth}
-%\begin{verbatim}
-%\unitlength=0.01\textwidth
-%\begin{picture}(100,50)(0,-25)
-%\put(0,0){\VECTOR(0,0)(45,0)\VECTOR(0,-25)(0,25)
-%\Zbox(45,0)[br]{x}\Zbox(0,26)[tl]{y}
-%\Curve(0,0)<77:1>(10,20)<1,0;2,0.4>(30,-20)<1,0;0.4,0.4>(40,0)<77:1;0.4,2>
-%}
-%\put(55,0){\VECTOR(0,0)(45,0)\VECTOR(0,-25)(0,25)
-%\Zbox(45,0)[br]{x}\Zbox(0,26)[tl]{y}
-%\CbezierBetween0,0And20,0WithDirs77:1And-77:1UsingDists28And{28}
-%\CbezierBetween20,0And40,0WithDirs-77:1And77:1UsingDists28And{28}}
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}\vspace{\baselineskip}
-%
-%\begin{minipage}{\linewidth}
-%\unitlength=0.01\textwidth
-%\begin{picture}(100,50)(0,-25)
-%\put(0,0){\VECTOR(0,0)(45,0)\VECTOR(0,-25)(0,25)
-%\Zbox(45,0)[br]{x}\Zbox(0,26)[tl]{y}
-%\Curve(0,0)<77:1>(10,20)<1,0;2,0.4>(30,-20)<1,0;0.4,0.4>(40,0)<77:1;0.4,2>
-%}
-%\put(55,0){\VECTOR(0,0)(45,0)\VECTOR(0,-25)(0,25)
-%\Zbox(45,0)[br]{x}\Zbox(0,26)[tl]{y}
-%\CbezierBetween0,0And20,0WithDirs77:1And-77:1UsingDists28And{28}
-%\CbezierBetween20,0And40,0WithDirs-77:1And77:1UsingDists28And{28}}
-%\end{picture}
-%\end{minipage}
-%\caption{A sequence of arcs; the left figure has been drawn with the
-% \cs{Curve} command with a sequence of four couples of point-direction
-% arguments; the right figure has been drawn with two commands
-% \cs{CbezierBetween} that include also the specification of the control
-% points}
-%\label{fig:sinewave}
-%\end{figure}
-%
-% In figure~\ref{fig:quadratic-arcs} some lines drawn are shown; they are
-% drawn  with quadratic splines by means of the |\Qurve| macro. In the
-% left there are some open and closed curves inscribed within a square.
-% On the right a “real" circle is compared to a quadratic spline circle;
-% the word “real” is emphasised because it actually is an approximation
-% with four quarter-circle cubic splines that, in spite of being drawn
-% with third degree parametric polynomials, approximate very well a real
-% circle; on the opposite the quadratic spline circle is clearly a poor
-% approximation even if the maximum radial error amounts just to about
-% 6\% of the radius.
-%
-%\begin{figure}[!htb]
-%\begin{minipage}{\linewidth}
-%\begin{Verbatim}[fontsize=\setfontsize{7.75}]
-%\unitlength=0.0045\textwidth
-%\begin{picture}(100,100)
-%\put(0,0){\framebox(100,100){}}
-%\put(50,50){%
-%  \Qurve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>
-%\color{green}
-%  \Qurve*(0,-50)<0,1>(50,0)<1,0>[-1,0](0,50)<0,1>[0,-1](-50,0)<-1,0>[1,0](0,-50)<0,-1> 
-%}
-%\Qurve(0,0)<1,4>(50,50)<1,0>(100,100)<1,4>
-%\put(5,50){\Qurve(0,0)<1,1.5>(22.5,20)<1,0>(45,0)<1,-1.5>%
-%(67.5,-20)<1,0>(90,0)<1,1.5>}
-%\Zbox(0,0)[tc]{0,0}\Zbox(100,0)[tc]{100,0}
-%\Zbox(100,100)[bc]{100,100}\Zbox(0,100)[bc]{0,100}
-%\Pall[2](0,0)\Pall[2](100,0)\Pall[2](100,100)\Pall[2](0,100)
-%\end{picture}
-%\hfill
-%\begin{picture}(100,100)
-%\put(0,0){\framebox(100,100){}}
-%\put(50,50){%
-%\Qurve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>
-%\Curve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>}
-%\Zbox(50,50)[t]{O}\Pall[2](50,50)\put(50,50){\Vector(45:50)}\Zbox(67,70)[tl]{R}
-%\end{picture}
-%\end{Verbatim}
-%\end{minipage}\vspace{2\baselineskip}
-%
-%\begin{minipage}{\linewidth}
-%\unitlength=0.0045\textwidth
-%\begin{picture}(100,100)
-%\put(0,0){\framebox(100,100){}}
-%\put(50,50){\Qurve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>}
-%\put(50,50){\color{green}%
-%\Qurve*(0,-50)<0,1>(50,0)<1,0>[-1,0](0,50)<0,1>[0,-1](-50,0)<-1,0>[1,0](0,-50)<0,-1>}
-%\Qurve(0,0)<1,4>(50,50)<1,0>(100,100)<1,4>
-%\put(5,50){\Qurve(0,0)<1,1.5>(22.5,20)<1,0>(45,0)<1,-1.5>(67.5,-20)<1,0>(90,0)<1,1.5>}
-%\Zbox(0,0)[tc]{0,0}\Zbox(100,0)[tc]{100,0}
-%\Zbox(100,100)[bc]{100,100}\Zbox(0,100)[bc]{0,100}
-%\Pall[2](0,0)\Pall[2](100,0)\Pall[2](100,100)\Pall[2](0,100)
-%\end{picture}
-%\hfill
-%\begin{picture}(100,100)
-%\put(0,0){\framebox(100,100){}}
-%\put(50,50){\Qurve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>
-%\Curve(0,-50)<1,0>(50,0)<0,1>(0,50)<-1,0>(-50,0)<0,-1>(0,-50)<1,0>}
-%\Zbox(50,50)[t]{O}\Pall[2](50,50)\put(50,50){\Vector(45:50)}\Zbox(67,70)[tl]{R}
-%\end{picture}
-%\end{minipage}
-%
-%\caption{\rule{0pt}{4ex}Several graphs drawn with quadratic Bézier
-% splines. On the right a quadratic spline circle is compared with a
-% cubic line circle.}
-%\label{fig:quadratic-arcs}
-%\end{figure}
-%
-% Notice that the previous version of |curve2e| contained an error and
-% would color the outside of the green four-pointed star. 
-% The |curve2e-v161|, attached to this bundle, has been corrected;
-% therefore it is not actually identical to the previous version,
-% although the latter one performed correctly for everything else except
-% for color-filled quadratic paths.
-% ^^A
-% \item The new version of |\multiput| is backwards compatibile with
-% the original version contained in the \LaTeX\ kernel. The new macro
-% adds the handling of the coordinate increments from one position to
-% the next for the \meta{object} to include in the drawing.
-%
-% On page~\pageref{pag:multiput} we show the code for the figure shown
-% there. The red grid is nothing new, except that it displays the
-% traditional |\multiput| used in this code, shown in a previous example,
-% produces exactly the same result. But the for “graphs” on the grid, it
-% display an alignment of black dots along the diagonal of the grid
-% (again traditional |\multiput| rendered with the new version);
-% a number of blue dots along a parabola; another number of magenta
-% dots alined along a half sine wave; a number of little green squares
-% aligned along a $-15~\circ$ line starting from the center of the grid;
-% notice the polar values that are used as polar relative coordinate
-% increments.
-%
-%\noindent\begin{figure}[!htb]
-%\begin{minipage}{0.45\linewidth}
-%\begin{Verbatim}[fontsize=\setfontsize{8}]
-%\unitlength=0.01\linewidth
-%\begin{picture}(100,100)
-%\GraphGrid(100,100)
-%\multiput(0,0)(10,10){11}{\circle*{2}}
-%\color{blue!70!white}
-%\multiput(0,0)(10,0){11}{\circle*{2}}%
-%  [\GetCoord(\R)\X\Y
-%  \edef\X{\fpeval{\X+10}}
-%  \edef\Y{\fpeval{(\X/10)**2}}
-%  \CopyVect\X,\Y to\R]
-%\color{magenta}
-%\multiput(0,0)(10,1){11}{\circle*{2}}%
-%  [\GetCoord(\R)\X\Y
-%   \edef\X{\fpeval{\X+10}}
-%   \edef\Y{\fpeval{sind(\X*1.8)*100}}
-%   \CopyVect\X\Y to\R]
-%\color{green!60!black}
-%\multiput(50,50)(-15:5){11}}{%
-%\polygon*(-1,-1)(1,-1)(1,1)(-1,1)}
-%\end{picture}
-%\end{Verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.45\linewidth}
-%\unitlength=0.01\linewidth
-%\begin{picture}(100,100)
-%\GraphGrid(100,100)
-%\multiput(0,0)(10,10){11}{\circle*{2}}
-%\color{blue!70!white}
-%\multiput(0,0)(10,0){11}{\circle*{2}}%
-%  [\GetCoord(\R)\X\Y
-%  \edef\X{\fpeval{\X+10}}
-%  \edef\Y{\fpeval{(\X/10)**2}}
-%  \CopyVect\X,\Y to\R]
-%\color{magenta}
-%\multiput(0,0)(10,1){11}{\circle*{2}}%
-%  [\GetCoord(\R)\X\Y
-%   \edef\X{\fpeval{\X+10}}
-%   \edef\Y{\fpeval{sind(\X*1.8)*100}}
-%   \CopyVect\X,\Y to\R]
-%\color{green!60!black}
-%\multiput(50,50)(-15:5){11}{\polygon*(-1,-1)(1,-1)(1,1)(-1,1)}
-%\end{picture}
-%\end{minipage}
-%\caption{Some examples of the \meta{handler} optional argument}%\label{pag:multiput}
-%\end{figure}
-%
-% A new command |\xmultiput| (not available with the previous versions
-% of |curve2e|) extended with respect to the original |\multiput| is
-% defined by using some L3 functions; in particular the cycling
-% counter is accessible to the \LaTeX\ commands and  it is stepped
-% forward from~1 to the value specified in the proper command argument
-% (in the original command it starts from that value and is stepped down
-% to zero). See the figure on page~\ref{pag:orologio} to inspect its
-% usage. It is important to notice that if the command|\rotatebox|
-% has to be used, as in the example of figure~\ref{pag:orologio}, the
-% package |graphics| should be also loaded, because |curve2e| does not
-% do it.
-%
-%\begin{figure}[!htb]
-%\begin{minipage}{0.45\textwidth}
-%\begin{verbatim}
-%\unitlength=0.0095\linewidth
-%\begin{picture}(100,100)
-%\GraphGrid(100,100)
-%\put(50,50){\thicklines\circle{100}}
-%\xmultiput[50,50](60:40)(-30:1){12}%
-%  {\makebox(0,0){\circle*{2}}}%
-%  [\MultVect\R by\D to\R]% 
-%\xmultiput[50,50](60:46)(-30:1){12}%
-%  {\ArgOfVect\R to\Ang
-%  \rotatebox{\fpeval{\Ang-90}}%
-%  {\makebox(0,0)[b]{\Roman{multicnt}}}}%
-%  [\Multvect{\R}{\D}\R]
-%\end{picture}
-%\end{verbatim}
-%\end{minipage}
-%\hfill
-%\begin{minipage}{0.45\textwidth}\raggedleft
-%\unitlength=0.0095\linewidth
-%\begin{picture}(100,100)
-%\GraphGrid(100,100)
-%\put(50,50){\thicklines\circle{100}}
-%\xmultiput[50,50](60:40)(-30:1){12}%
-%  {\makebox(0,0){\circle*{2}}}[\MultVect\R by\D to\R]% 
-%\xmultiput[50,50](60:43)(-30:1){12}%
-%  {\ArgOfVect\R to\Ang\rotatebox{\fpeval{\Ang-90}}%
-%    {\makebox(0,0)[b]{\Roman{multicnt}}}}%
-%      [\Multvect{\R}{\D}\R]
-%\end{picture}
-%\end{minipage}
-%\caption{Usage example of the \texttt{\string\xmultiput} command}
-%\label{pag:orologio}\hfill
-%\end{figure}
-%  
-% \end{enumerate}
-%
-%
-% In spite of the relative simplicity of the macros contained in this
-% package, the described macros, as well as the original ones included in
-% the |pict2e| package, allow to produce fine drawings that were
-% unconceivable with the original \LaTeX\ picture environment. Leslie
-% Lamport himself announced an extension to his environment when \LaTeXe\
-% was first released in 1994; in the |latexnews| news-letter of December
-% 2003; the first implementation was announced; the first version of this
-% package |curve2e| was issued in 2006. It was time to have a  better
-% drawing environment; this package is a simple attempt to follow the
-% initial path while extending the drawing facilities; but Till Tantau's
-% |pgf| package has gone much farther.
-%
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% \section{Remark}
-%^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-% There are other packages in the \textsc{ctan} archives that deal with
-% tracing curves of various kinds. |PSTricks| and |tikz/pgf| are the most
-% powerful ones.
-% But there is also the package |curves| that is intended to draw almost
-% anything by using little dots or other symbols partially superimposed
-% to one another. It uses only quadratic Bézier curves and the curve
-% tracing is eased by specifying only the curve nodes, without specifying
-% the control nodes; with a suitable option to the package call it is
-% possible to reduce the memory usage by using short straight segments
-% drawn with the PostScript facilities offered by the |dvips| driver.
-%
-% Another package |ebezier| performs about the same as |curve2e| but
-% draws its Bézier curves by using little dots partially superimposed to
-% one another. The documentation is quite interesting since it
-% explains very clearly what exactly are the Bézier splines. Apparently
-% |ebezier| should be used only for DVI output without recourse to
-% PostScript or PDF machinery.
-%
-% The |picture| package extends the performance of the |picture|
-% environment (extended with \texttt{pict2e}) by accepting coordinates
-% and lengths in real absolute dimensions, not only as multiples of
-% |\unitlength|; it provides commands to extend that functionality to
-% other packages. In certain circumstances it is very useful.
-%
-% Package \texttt{xpicture} builds over the |picture| \LaTeX\ environment
-% so as to allow to draw the usual curves that are part of an
-% introductory analytic geometry course; lines, circles, parabolas,
-% ellipses, hyperbolas, and polynomials; the syntax is very comfortable;
-% for all these curves it uses the quadratic Bézier splines.
-% 
-% Package |hobby| extends the cubic Bézier spline handling with the
-% algorithms John Hobby created for \MF\ and \MP. But by now this package
-% interfaces very well with |tikz|; it has not (yet) been adapted to the
-% common |picture| environment, even when extended with |pict2e|, and,
-% why not, with |curve2e|.
 %
 %^^A%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % \section{Acknowledgements}
@@ -1499,7 +469,7 @@ README.txt and curve2e-v161.sty.
 % in the previous version of this package, although the macro used by
 % Josef was slightly  different. Both versions aim/aimed at a better
 % accuracy and at widening the operand ranges. In this version we
-% abandoned the long division macro, and substituted it with the
+% abandoned our long division macro, and substituted it with the
 % floating point division provided by the |xfp| package.
 %
 % Daniele Degiorgi spotted a fault in the kernel definition of
@@ -1510,8 +480,8 @@ README.txt and curve2e-v161.sty.
 % crucial modification in order to have \texttt{curve2e} work smoothly
 % also with XeTeX (XeLaTeX). Actually if |pict2e|, version 0.2x or later,
 % dated 2009/08/05  or later, is being used, such modification is not
-% necessary any more, but it's true that it becomes imperative if older
-% versions are used.
+% necessary any more, but it's true that it becomes imperative when older
+% versions were used.
 %
 % \StopEventually{%
 % \begin{thebibliography}{9}
@@ -1876,38 +846,33 @@ README.txt and curve2e-v161.sty.
 % distance is nominal in the sense that it is recalculated in such a way
 % that the first and last dots coincide with the line end points.
 % Again if the second point coordinates are in polar form they are
-% considered as relative to the first point. The syntax is as follows:
+% considered as relative to the first point.Since the dots must emerge
+% from the background of the drawing they should not be too small; they
+% must be seen; therefore their diameter cannot  be tied to the unit
+% length of the particular drawing, but must have at visible size; by
+% default it is set to $0.5\,\mathrm{mm}$ (about 20 mills, in US units)
+% but through an optional argument to the macro, it may be set to any
+% desired size; remember that 1\,pt is about one third of a millimeter;
+% sometimes it might be too small; 1\,mm is a vary black dot, therefore
+% the user must pay attention when s/he specifies the dot diameter,
+% so as not to exaggerate in either direction.
+% The syntax is as follows:
 %\begin{flushleft}
-%\cs{Dotline}\parg{start point}\parg{end point}\marg{dot distance}
+%\cs{Dotline}\parg{start point}\parg{end point}\marg{dot distance}\oarg{diameter}
 %\end{flushleft}
 %    \begin{macrocode}
 \ifx\Dotline\undefined
-  \def\Dotline{\@ifstar{\Dotline@}{\Dotline@}}% backwards compatibility
-  \def\Dotline@(#1)(#2)#3{\put(#1){%
-  \IsPolar#2:?{%                    Polar
-     \Dotline@@(0,0)(#2){#3}}
-   {%                               Cartesian
-   \CopyVect#1to\V@ttA
-   \CopyVect#2to\V@ttB 
-   \SubVect\V@ttA from\V@ttB to\V@ttC 
-   \Dotline@@(0,0)(\V@ttC){#3}}%
-   }}
-
-  \def\Dotline@@(#1)(#2)#3{%
-   \countdef\NumA 3254\relax 
-   \countdef\NumB 3255\relax
-   \CopyVect#1to\V@ttA 
-   \CopyVect#2to\V@ttB 
-   \SubVect\V@ttA from\V@ttB to\V@ttC
-   \ModOfVect\V@ttC to\DotlineMod
-   \DivideFN\DotlineMod by#3 to\NumD 
-   \NumA=\fpeval{trunc(\NumD,0)}\relax
-   \Divvect{\V@ttC}{\NumA,0}\V@ttB
-   \advance\NumA\@ne 
-   \put(\V@ttA){\multiput(0,0)(\V@ttB){\NumA}{\makebox(0,0)%
-               {\circle*{0.5}}}}
-   \ignorespaces
-  }%
+  \providecommand\Dotline{}
+  \RenewDocumentCommand\Dotline{R(){0,0} R(){1,0} m O{1mm}}{%
+  \put(#1){\edef\Diam{\fpeval{{#4}/\unitlength}}%
+  \IsPolar#2:?{\CopyVect#2to\DirDot}%
+              {\SubVect#1from#2to\DirDot}%
+  \countdef\NumA=3254\relax 
+  \ModAndAngleOfVect\DirDot to\ModDirDot and\AngDirDot
+  \edef\NumA{\fpeval{trunc(\ModDirDot/{#3},0)}}%
+  \edef\ModDirDot{\fpeval{\ModDirDot/\NumA}}%
+  \multiput(0,0)(\AngDirDot:\ModDirDot){\inteval{\NumA+1}}%
+    {\makebox(0,0){\circle*{\Diam}}}}\ignorespaces}
 \fi
 %    \end{macrocode}
 %
@@ -4105,19 +3070,22 @@ The package bundle curve2e is composed of the following files
 curve2e.dtx
 curve2e.pdf
 README.txt
-ltxdoc.cfg
+curve2e-manual.tex
+curve2e-manual.pdf
 
 curve2e.dtx is the documented TeX source file of file curve2e.sty; you
 get curve2e.sty, curve2e.pdf, and curve2e-v161.sty by running pdflatex 
-on curve2e.dtx. The ltxdoc.cfg file customises the way the documentation 
-file is typeset. This specific .cfg file is part of the ltxdoc package 
-functionality and it is supposed to be configured for each specific 
-other bundle.
+on curve2e.dtx. The curve2e-manual files contain the user manual; in 
+this way the long preliminary descriptive part has been transferred to 
+a shorter dedicated file, and the “normal” user should have enough 
+information to use the package. Th curve2e.pdf file, extracted from 
+the .dtx one, contains the code documentation and is intended for the developers, or for the curious advanced users.
 
 README.txt, this file, contains general information.
 
-Curve2e-v161.sty contains a previous version of the package; see below
-why the older version might become necessary for the end user.
+This bundle contains also package curve2e-v161.sty that is a previous 
+version of this package; see below why the older version might become 
+necessary to the end user.
 
 Curve2e.sty is an extension of the package pict2e.sty which extends the
 standard picture LaTeX environment according to what Leslie Lamport
@@ -4127,22 +3095,25 @@ This further extension curve2e.sty allows to draw lines and vectors
 with any non integer slope parameters, to draw dashed lines of any 
 slope, to draw arcs and curved vectors, to draw curves where just 
 the interpolating nodes are specified together with the slopes at 
-the nodes; closed paths of any shape can be filled with color; all 
+such nodes; closed paths of any shape can be filled with color; all 
 coordinates are treated as ordered pairs, i.e. 'complex numbers'; 
-coordinates may be expressed also in polar form. Coordinates may be specified with macros, so that editing any drawing is rendered much simpler: any point specified with a macro is modified only once in the macro definition.
+coordinates may be expressed also in polar form. Coordinates may be 
+specified with macros, so that editing any drawing is rendered much 
+simpler: any point specified with a macro is modified only once in 
+its macro definition.
 Some of these features have been incorporated in the 2011 version of
 pict2e; therefore this package avoids any modification to the original
 pict2e commands.
 
 Curve2e now accepts polar coordinates in addition to the usual cartesian
-ones; several macros have been upgraded and a new macro for tracing cubic
+ones; several macros have been upgraded; a new macro for tracing cubic
 Bezier splines with their control nodes specified in polar form is
 available. The same applies to quadratic Bezier splines. The multiput
-command has been completely modified in a backwards compatible way, as
-to manipulate the increment components in a configurable way. A new 
-xmultiput command has been defined that is more configurable than the 
-original one; both \multiput and \xmultiput are backwards compatible with 
-the original picture environment definition.
+command has been completely modified in a backwards compatible way; the
+new version allows to manipulate the increment components in a configurable 
+way. A new xmultiput command has been defined that is more configurable 
+than the original one; both \multiput and \xmultiput are backwards 
+compatible with the original picture environment definition.
 
 This version solves a conflict with package eso-pic.
 
@@ -4155,25 +3126,27 @@ If you specify
 
 the package pict2e is automatically invoked with the specified options.
 
-The -almost compatible- frase is necessary to explain that this version
-of curve2e uses some `functions' of the LaTeX3 language that were made
-available to the LaTeX developers by mid October 2018. Should the user
+The -almost fully compatible- phrase is necessary to explain that this 
+version of curve2e uses some `functions' of the LaTeX3 language that were 
+made available to the LaTeX developers by mid October 2018. Should the user
 have an older or a basic/incomplete installation of the TeX system,
 such L3 functions might not be available. This is why this
 package checks the presence of the developer interface; in case
-such interface is not available it falls back to the previous version
-renamed curve2e-v161.sty, which is part of this bundle; this order 
+such interface is not available it rolls back to the previous version
+renamed curve2e-v161.sty, which is part of this bundle; this other 
 package name must not be modified in any way. The compatibility mentioned 
 above implies that the user macros remain the same, but their 
-implementation requires the L3 interface.
+implementation requires the L3 interface. Some macros and environments 
+rely totally on the xfp package functionalities, but legacy documents 
+source files should compile correctly.
 
-The package has the LPPL status of author maintained.
+The package has the LPPL status of maintained.
 
 According to the LPPL licence, you are entitled to modify this package,
 as long as you fulfil the few conditions set forth by the Licence.
 
-Nevertheless this package is an extension to the standard LaTeX package
-pict2e (2014). Therefore  any change must be controlled on the
+Nevertheless this package is an extension to the standard LaTeX
+pict2e (2014) package. Therefore any change must be controlled on the
 parent package pict2e, so as to avoid redefining or interfering with
 what is already contained in the official package.
 
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cgit v1.2.3

