symbols
I am in a need of symbol(s) which would denote the set of self-loops in a graph, usable in a mathematical context. As of now, I'm choosing between
S and L, The symbol has to maintain its form when switching to a different font or font size. As of now, I don't know whether any of them is already available in some package. Do you know more?
(Note: Unicode is unfortunately out of question.)
Since you are using amsthm, you need to redefine the \qedsymbol (in the preamble of your document if the change must apply to all the document). One option would be to use the \Squarepipe command from the marvosym package; here's a simple example:
\documentclass{article}
\usepackage{amsthm}
\usepackage{marvosym}
\renewcommand\qedsymbol{\Squarepipe}
\begin{document}
\begin{proof}test\end{proof}
\end{document}
Of course, you can define your own square; here's a comparison between the default symbol, the \Squarepipe command from marvosym and a customized \BoldSquare newly defined (you can change the values for \fboxrule and the arguments of \rule according to your needs):
\documentclass{article}
\usepackage{amsthm}
\usepackage{marvosym}
\newcommand\BoldSquare{%
\setlength\fboxrule{1.1pt}\setlength\fboxsep{0pt}\fbox{\phantom{\rule{5pt}{5pt}}}}
\begin{document}
\begin{proof}test\end{proof}
\renewcommand\qedsymbol{\Squarepipe}
\begin{proof}test\end{proof}
\renewcommand\qedsymbol{\BoldSquare}
\begin{proof}test\end{proof}
\end{document}
A preliminary version: a proof of concept
{Fanfare} I'm so excited when writing these lines that I cannot even breathe (I'm feeling well, doctor, I'm really fine). :-) Well, it's a big TeX moment for me, you are a part of it!
I was reading Letterpress effect through PSTricks or Tikz where I've noticed that Andrew Stacey converted some STIX fonts to TikZ paths/curves somehow - I'm not sure if the source codes were OTF/PFB files or some other source files (PL, VPL, WFF, EOT, perhaps?). Maybe svgtopgf.pl script from http://bazaar.launchpad.net/~tex-sx/tex-sx/development/files/170 has been used (I've tried some random SVG picture and it wasn't working well for me). It's hard to guess without further research, but it works!
In the meantime, I've read in this question Outlining (filling) glyph outline with text in TikZ that all the major graphics engines (Metapost, PSTricks, Asymptote) should be able to load glyphs at the curve level. I'm not sure about TikZ, but it can load SVG paths, it might help.
Let's get back to our minimal working example.
Step 1: Downloading the fonts converted to paths
I've downloaded two files, pgflibraryshapes.letters.dtx and stikz-normal-paths.tex, to my working directory.
Step 2: Installing dtx file (it includes support TeX files)
I've processed/installed the first file by running this line once:
tex pgflibraryshapes.letters.dtx
Step 3: Running an example and using it
We can run any major LaTeX engine, e.g.
lualatex mal-letters.tex
This is the content of the TeX file:
% run: any major LaTeX engine mal-letters.tex
% Based on and inspired by:
% https://tex.stackexchange.com/q/62570/86
\documentclass{article}
\pagestyle{empty}
\usepackage{tikz}
\usetikzlibrary{shapes.letters}
\addtolength{\textheight}{2in}
%\usetikzlibrary{fadings} % I am cutting down the example to bare minimum...
%\usetikzlibrary{shadows.blur}
\usetikzlibrary{intersections}
\pgfkeys{
/pgf/letter/.cd,
load font={stikz}{normal},
size=4,
load encoding=char,
every letter/.append style={
fill, draw=red, line width=1pt,
},
}% End of \pgfkeys...
\makeatletter
\tikzset{
use letter path/.code={%
\pgfscope
\pgftransformscale{\letter@size}%
\letter@path{\letter@encode{#1}}%
\endpgfscope
}% end of use letter...
}% end of \tikzset...
\makeatother
\begin{document}
%\newcount\malrotate
%\malrotate=-10
%\loop
%\advance\malrotate by 10
\foreach \malrotate in {0,10,...,180} {% 45 0,10,...,180
\begin{tikzpicture}
\begin{scope}[xshift=20mm, yshift=-7mm, rotate=\malrotate]
\path[name path global=first, use letter path=T, fill=red];
% draw=green, line width=1pt,
\end{scope}
\begin{scope}[yshift=6mm, xshift=2mm, rotate=-\malrotate]
\path[name path global=second, use letter path=B, fill=blue, opacity=0.4];
% draw=green, line width=1pt,
\end{scope}
\fill[name intersections={of=first and second, name=i, total=\t}] [black]
\ifnum\t>0%
node{%
%\pgfmathparse{\t}%
%\global\let\mtotal=\pgfmathresult
\typeout{Number of intersection points: \t}%
}%
\foreach \s in {1,...,\t} {%
(i-\s) circle (1pt) node[above]{\footnotesize\s}%
}%
\else
node{\typeout{There are no intersection points!}}%
\fi;
%\typeout{Number of intersection points: \t};
\end{tikzpicture} %
}% End of \foreach...
%\ifnum\malrotate<180\repeat
\end{document}
The good news is that it's working, the bad news is that we are getting an incorrect number of intersection points when the picture is drawn within a cycle (\foreach or \loop...\repeat), so there might be a bug (when using name path global? Or maybe there is a problem in the support files? I don't know at the moment.). The very first and the very last message are correct for sure.
Number of intersection points: 4
Number of intersection points: 9
Number of intersection points: 20
Number of intersection points: 32
Number of intersection points: 19
Number of intersection points: 17
Number of intersection points: 23
Number of intersection points: 15
Number of intersection points: 13
Number of intersection points: 10
Number of intersection points: 16
Number of intersection points: 19
Number of intersection points: 17
Number of intersection points: 26
Number of intersection points: 19
Number of intersection points: 24
Number of intersection points: 19
Number of intersection points: 7
There are no intersection points!
This example loads two glyphs and names them. It transforms them with the help of the scope environments as it cannot be done directly in \path command as far as I can say (although I haven't tested the cm parameter, yet). Then we find intersection points and use them (see some more examples and settings in the TikZ manual, search for intersections library).
If we draw one picture at a time, the number of points is correct.
Well, there is a lot of work ahead (converting some other fonts, setting up and testing optimization with different parameters on real examples), but this is the core.
I know about practical tasks where I'm going to need it soon for sure:
I enclose a preview of that page and a closeup shot with some additional settings.
Best Answer
You can have one, the other, or both. EDITED to handle different font sizes. Your mileage may vary with different fonts. Shown here in math mode, but it will produce the same result in text mode, though clearly the
\CircArrowRightwill blow the line spacing if included in inline text.