Am 03.06.2016 um 01:23 teilte mwilkins mit: Hi Matt,
I tried to reproduce the problem. Even w/ 1200% magnification I don't
see any difference. Attached are two pdf files, one w/ the original
pgflibraryplotmarks.code.tex one time w/ the described fix.
Can you still reproduce the problem?
Hilmar
> The file
> /usr/share/texmf/tex/generic/pgf/libraries/pgflibraryplotmarks.code.tex
> is buggy. When you use the tex command
> \pgfuseplotmark{triangle*}
> the triangle does not appear in the correct position, it is shifted to
> the right by a little bit. You can google this problem and see that
> the solution is to append % to the lines in the definition of
> \pgfdeclareplotmark{triangle*}. You know in tex, newlines in
> definitions often muck things up, you need to stick the comment on the
> end of the line to fix it up. Actually you probably could patch all
> the other definitions in the file, but I only used the triangle* and
> triangle so only tested it with those.
>
> Here is a small test case for you:
>
> \documentclass{article}
>
> \usepackage{tikz}
> \usetikzlibrary{plotmarks}
>
> \begin{document}
> \begin{tikzpicture}
> \draw (-1, 0) -- (1, 0);
> \draw (0, -1) -- (0, 1);
> \node at (0,0) {\pgfuseplotmark{triangle*}};
> \end{tikzpicture}
>
> \end{document}
>
> Just save it in a .tex file, pdflatex it, and view the pdf file. The
> triangle is not at (0, 0). Then edit
> /usr/share/texmf/tex/generic/pgf/libraries/pgflibraryplotmarks.code.tex
> making sure the triangle* section looks like this
>
> % A stroke-filled triangle mark
>
> \pgfdeclareplotmark{triangle*}
> {%
> \pgfpathmoveto{\pgfqpoint{0pt}{\pgfplotmarksize}}%
> \pgfpathlineto{\pgfqpointpolar{-30}{\pgfplotmarksize}}%
> \pgfpathlineto{\pgfqpointpolar{-150}{\pgfplotmarksize}}%
> \pgfpathclose%
> \pgfusepathqfillstroke
> }
>
> and everything will be fine, the triangle will appear exactly at (0, 0).
>
> I did attempt to get this fixed upstream, but never got anywhere with them.
> Perhaps we can just have a patch in debian? Or you could try to push
> it upstream and you will have more traction than I?
>
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