#299 Precision problem with explicitily anchored labels

[Ignasi]

In TeX.SX Label position angle problem question is shown that not all angles are valid as anchors for labels.

A code like:

\documentclass[tikz]{standalone}
\usetikzlibrary{quotes}

\begin{document}
\begin{tikzpicture}[label distance=1cm]
\foreach \x in {0,10,...,360} {
\coordinate["\x:$F$"] (F) at (0,0) {};
\draw[red] (0,0)--++(\x:2cm);}
\end{tikzpicture}
\end{document}

should draw label "F" on angles 0, 10, 20, ... but it produces the result in attached file.

[Paul Gaborit]

It's not a bug.

Try this example:

\documentclass[tikz]{standalone}
\usetikzlibrary{quotes}

\begin{document}
\begin{tikzpicture}[label distance=1cm]
  \foreach \x in {0,10,...,360} {
    \typeout{x:\x}
    \edef\x{\x}
    \coordinate["\x:$F$" {draw}] (F) at (0,0);
    \draw[red] (0,0)--++(\x:2cm);
    \fill[blue] (\x:1cm) circle(1pt);
  }
\end{tikzpicture}
\end{document}

Then read the pgfmanual p.241 (v3.0).

[Christian Feuersänger]

Closing based on Paul's comment.

[Ignasi]

I'm sorry but I don't understand how Paul's comment works and how information in page 241 explains it. Its result is just

http://imgur.com/zaLOmhu

while I expected 36 labels arround a central node. If you look at http://tex.stackexchange.com/questions/163762/label-position-angle-problem you can find an answer from Mark Wibrow which also suggestes at least a precission problem computing labels positions.

[Paul Gaborit]

Page 241: the automatically choosen anchors for labels are always north, north east, east, etc. or 0°, 45°, 90°, 135°, etc (multiples of 45°). They never are 35° or 73°...

[Christian Feuersänger]

Thanks for your fast reaction. I conclude that I was somewhat too fast. I reopened the ticket for investigation.

[Ignasi]

Christian,

Paul's code works as expected. It was my fault. The figure I attached before was produced with a "spurios" code in my test file. Paul's code produces 36 labels which are anchored on its "nearest to center corner" and not on its center. I understand this is the reason for the wrong aligned for draw=none labels.

[Henri Menke]

Should have been closed again. Not a bug.

[Stefan Pinnow]

For details see https://github.com/pgf-tikz/pgf/issues/298