[dk-tug] Tikz problem - pile ikke på linie

Nogen der har ideer til hvordan amn overtaler tikz til at sørge for at 
pilene i nedenstående regning holder samme retning.

Det er muligt hvis man roder med en masse phantom, men det burde jo også 
være noget tikz selv kunne finde ud af.

MWE:

\documentclass[a4paper]{memoir}
\usepackage{tikz,amsmath,bm}
\usetikzlibrary{matrix,arrows}
\newcommand\nonedot{\bm\cdot}
\newcommand\order[1]{_{\scriptscriptstyle #1}}
\begin{document}

\begin{tikzpicture}
   \matrix (M) [matrix of math nodes,
   column sep=1.3em,row sep=1.3em,
   ]
   {
     \nonedot          & \nonedot          & \nonedot         & \nonedot 
         & \nonedot          & \nonedot \\
     \frac51\order{10} & \nonedot          & \nonedot         & \nonedot 
         & \nonedot          & \nonedot \\
     \frac41\order{9}  & \frac42\order{11} & \nonedot         & \nonedot 
         & \nonedot          & \nonedot \\
     \frac31\order{4}  & \frac32\order{8}  & \frac33          & \nonedot 
         & \nonedot          & \nonedot \\
     \frac21\order{3}  & \frac22           & \frac23\order{7} & \frac24 
          & \nonedot          & \nonedot \\
     \frac11\order{1}  & \frac12\order{2}  & \frac13\order{5} & 
\frac14\order{6} & \frac15\order{12} & \nonedot \\
   };
   % oenskede 'retninger'
   \draw[dashed,thin,pink] (M-1-1) -- (M-6-6);
   \draw[dashed,thin,pink] (M-2-1) -- (M-6-5);
   \draw[dashed,thin,pink] (M-3-1) -- (M-6-4);
   \draw[dashed,thin,pink] (M-4-1) -- (M-6-3);
   \draw[dashed,thin,pink] (M-5-1) -- (M-6-2);

   \draw[->] (M-6-1) -- (M-6-2);
   \draw[->] (M-6-2) -- (M-5-1);
   \draw[->] (M-5-1) -- (M-4-1);
   \draw[->] (M-4-1) -- (M-5-2);
   \draw[->] (M-5-2) -- (M-6-3);
   \draw[->] (M-6-3) -- (M-6-4);
   \draw[->] (M-6-4) -- (M-5-3);
   \draw[->] (M-5-3) -- (M-4-2);
   \draw[->] (M-4-2) -- (M-3-1);
   \draw[->] (M-3-1) -- (M-2-1);
   \draw[->] (M-2-1) -- (M-3-2);
   \draw[->] (M-3-2) -- (M-4-3);
   \draw[->] (M-4-3) -- (M-5-4);
   \draw[->] (M-5-4) -- (M-6-5);
   \draw[->] (M-6-5) -- (M-6-6);
   \draw[->] (M-6-6) -- (M-5-5);
   \draw[->] (M-5-5) -- (M-4-4);
   \draw[->] (M-4-4) -- (M-3-3);
   \draw[->] (M-3-3) -- (M-2-2);
   \draw[->] (M-2-2) -- (M-1-1);
\end{tikzpicture}

\end{document}



-- 

/Lars Madsen
DK-TUG formand, tug.dk