Calculated label rotation in postscript

Question

Elaborating on a solution obtained from the accepted answer of my earlier question, I would like to rotate upside-down labels on the righthand side of the rosetta using modulus.

\documentclass[dvipsnames,pstricks]{standalone}
\usepackage{multido}
\usepackage{arrayjobx}

\begin{document}
\begin{pspicture}(-3.5,-3.5)(3.5,3.5)
\newarray\Names
\readarray{Names}{Tankegang&Problembehandling&Modellering&Ræsonnement&Hjælpemiddel&Kommunikation&Symbol- og formalisme&Repræsentation}
\multido{\iA=1+1,\rA=112+45}{8}{%
  \rput{!\rA\space 180 sub}(2;\rA){\Names(\iA)}}
\end{pspicture}
\end{document}

The output is

What I mean is that I want to calculate label rotation angles modulo 180, but contrary to my expectation, \rput{!\rA\space 180 sub 180 mod}(... produces multiple copies of the terse error message:

MiKTeX GPL Ghostscript
9.19: Unrecoverable error, exit code 1

I compile on a Win10 PC using TexMaker 4.5, calling XeLaTeX.

I read the following discussions, but do not seem to get to a solution:

No visible images in PDF: MiKTeX GPL Ghostscript 9.05: Unrecoverable error, exit code 1 and the questions referenced there.

score 2 · Accepted Answer · 2017-06-28T11:34:38.383

2

\listfiles
\documentclass[dvipsnames,pstricks]{standalone}
\usepackage{multido}
\usepackage{arrayjobx}
\newarray\Names

\begin{document}
    \begin{pspicture}(-3.75,-3.75)(4.25,3.75)
    \readarray{Names}{%
        Tankegang&Problembehandling&Modellering&%
        Ræsonnement&Hjælpemiddel&Kommunikation&%
        Symbol-og formalisme&Repræsentation}
    \multido{\iA=1+1,\iB=112+45}{8}{%
        \ifnum\iB<270 
          \rput[r]{!\iB\space 180 add}(1;\iB){\Names(\iA)}%
        \else
          \rput[l]{\iB}(1;\iB){\Names(\iA)}%
        \fi}
    \end{pspicture}
\end{document}

edited Jun 28 '17 at 11:34

answered Jun 26 '17 at 14:55

1

use !\rA\space cvi 180 sub 180 mod – Jun 27 '17 at 06:04
Ah, failing to convert to integer (cvi) was what missed! And, in all probablilty, what triggered the mentioned error message. – Morten Engelsmann Jun 27 '17 at 07:12
1

Instead of \rA you can also use \iB then you do not need the conversion into an integer. In your first example you startet with a real angle value. However, I have no idea about your error message because I do not have any problem. – Jun 27 '17 at 07:18
Correct, I edited MWE in an attemt to work around having mod provoking the mentioned error. Both arguments to mod must be integers. – Morten Engelsmann Jun 27 '17 at 07:26
Actually, !\iB\space 90 add 180 mod 90 sub does the trick of correctly rotating the labels as wished. – Morten Engelsmann Jun 28 '17 at 10:30
1

See my edited answer ... – Jun 28 '17 at 11:26
Elegant solution avoiding mod altogether – Morten Engelsmann Jun 28 '17 at 14:19

Calculated label rotation in postscript

1 Answers1