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1. • CommentRowNumber1.
   • CommentAuthorHarrison Smith
   • CommentTimeJul 11th 2015
   • PermaLink
   Author: Harrison Smith
   Format: MarkdownItexI stumbled upon a nice finite state machine generator [here](http://madebyevan.com/fsm/). It basically allows you to draw FSMs in HTML5 Canvas, and it exports them to PNG, SVG, or LaTeX. The actual javascript is over [here](http://madebyevan.com/fsm/fsm.js). I'm currently working on making it better suited for making diagrams, but I don't know javascript, so it will take quite a while! I thought I might as well post it here, because I think we all know the struggle of typesetting diagrams. For very rudimentary examples, however, all you really need to do is remove the instances of \draw [black] (x,y) circle (3); For example, here's a pullback diagram that I made in just under four minutes:   \documentclass[12pt]{article} \usepackage{tikz} \begin{document} \begin{center} \begin{tikzpicture}[scale=0.2] \tikzstyle{every node}+=[inner sep=0pt] \draw (40.4,-49.7) node {$A$}; \draw (62.7,-27.7) node {$B$}; \draw (62.7,-49.7) node {$C$}; \draw (40.4,-27.7) node {$P$}; \draw (26.3,-14.9) node {$Q$}; \draw [black] (62.7,-30.7) -- (62.7,-46.7); \fill [black] (62.7,-46.7) -- (63.2,-45.9) -- (62.2,-45.9); \draw (63.2,-38.7) node [right] {$g$}; \draw [black] (43.4,-49.7) -- (59.7,-49.7); \fill [black] (59.7,-49.7) -- (58.9,-49.2) -- (58.9,-50.2); \draw (51.55,-50.2) node [below] {$f$}; \draw [black] (40.4,-30.7) -- (40.4,-46.7); \fill [black] (40.4,-46.7) -- (40.9,-45.9) -- (39.9,-45.9); \draw (40.9,-38.7) node [right] {$p_A$}; \draw [black] (43.4,-27.7) -- (59.7,-27.7); \fill [black] (59.7,-27.7) -- (58.9,-27.2) -- (58.9,-28.2); \draw (51.55,-28.2) node [below] {$p_B$}; \draw [black] (29.287,-14.632) arc (93.14628:48.10544:43.245); \fill [black] (60.54,-25.62) -- (60.28,-24.71) -- (59.61,-25.46); \draw (47.99,-16.45) node [above] {$q_B$}; \draw [black] (38.075,-47.805) arc (-131.55229:-184.33485:36.321); \fill [black] (38.08,-47.81) -- (37.81,-46.9) -- (37.15,-47.65); \draw (27.76,-35.16) node [left] {$q_A$}; \draw [black] (28.52,-16.92) -- (38.18,-25.68); \fill [black] (38.18,-25.68) -- (37.92,-24.78) -- (37.25,-25.52); \draw (29.45,-21.79) node [below] {$\exists!q$}; \end{tikzpicture} \end{center} \end{document}   Hopefully this helps at least one person out, and I'll post a follow up if I ever manage to get it up and running as a good tool for typesetting mathematics.   Cheers, Harrison Smith.

   I stumbled upon a nice finite state machine generator here. It basically allows you to draw FSMs in HTML5 Canvas, and it exports them to PNG, SVG, or LaTeX. The actual javascript is over here. I’m currently working on making it better suited for making diagrams, but I don’t know javascript, so it will take quite a while! I thought I might as well post it here, because I think we all know the struggle of typesetting diagrams. For very rudimentary examples, however, all you really need to do is remove the instances of

   \draw [black] (x,y) circle (3);

   For example, here’s a pullback diagram that I made in just under four minutes:

    

   \documentclass[12pt]{article}

   \usepackage{tikz}

   \begin{document} \begin{center} \begin{tikzpicture}[scale=0.2] \tikzstyle{every node}+=[inner sep=0pt] \draw (40.4,-49.7) node {$A$}; \draw (62.7,-27.7) node {$B$}; \draw (62.7,-49.7) node {$C$}; \draw (40.4,-27.7) node {$P$}; \draw (26.3,-14.9) node {$Q$}; \draw [black] (62.7,-30.7) – (62.7,-46.7); \fill [black] (62.7,-46.7) – (63.2,-45.9) – (62.2,-45.9); \draw (63.2,-38.7) node [right] {$g$}; \draw [black] (43.4,-49.7) – (59.7,-49.7); \fill [black] (59.7,-49.7) – (58.9,-49.2) – (58.9,-50.2); \draw (51.55,-50.2) node [below] {$f$}; \draw [black] (40.4,-30.7) – (40.4,-46.7); \fill [black] (40.4,-46.7) – (40.9,-45.9) – (39.9,-45.9); \draw (40.9,-38.7) node [right] {$p_A$}; \draw [black] (43.4,-27.7) – (59.7,-27.7); \fill [black] (59.7,-27.7) – (58.9,-27.2) – (58.9,-28.2); \draw (51.55,-28.2) node [below] {$p_B$}; \draw [black] (29.287,-14.632) arc (93.14628:48.10544:43.245); \fill [black] (60.54,-25.62) – (60.28,-24.71) – (59.61,-25.46); \draw (47.99,-16.45) node [above] {$q_B$}; \draw [black] (38.075,-47.805) arc (-131.55229:-184.33485:36.321); \fill [black] (38.08,-47.81) – (37.81,-46.9) – (37.15,-47.65); \draw (27.76,-35.16) node [left] {$q_A$}; \draw [black] (28.52,-16.92) – (38.18,-25.68); \fill [black] (38.18,-25.68) – (37.92,-24.78) – (37.25,-25.52); \draw (29.45,-21.79) node [below] {$\exists!q$}; \end{tikzpicture} \end{center}

   \end{document}

    

   Hopefully this helps at least one person out, and I’ll post a follow up if I ever manage to get it up and running as a good tool for typesetting mathematics.

    

   Cheers,

   Harrison Smith.