[Problem] Wrong arrows with \nccoil and \nczigzag

[Denis Girou]

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  Wolfgang May <may at informatik.uni-freiburg.de> report today that the
\nczigzag macro is drawn in the wrong direction, from the ending to the
starting point. The effect is that if arrows are defined, they appear
exchanged.

  In fact, the problem is the same for \nccoil and was introduced in
`pst-beta' in 1994.

  My test case is:

\documentclass{article}

\usepackage{pst-node,pst-coil}

\pagestyle{empty}

\begin{document}

\psset{arrowscale=3,coilwidth=0.5,coilarm=1}

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \ncline{->}{A}{B}
\end{pspicture}

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \nczigzag{->}{A}{B}
\end{pspicture}

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \nccoil{->}{A}{B}
\end{pspicture}

\makeatletter
% To correct in pst-node.tex and pst-coil.tex
\def\nccoil at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998
4 2 roll
% DG/SR modification end
\psk at coilwidth \pscoilheight
\psk at coilarmA \psk at coilarmB
\psk at coilaspect \psk at coilinc
\pst at coildict \tx at Coil end
end}}
\def\nczigzag at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998
4 2 roll
% DG/SR modification end
\pscoilheight
\psk at coilwidth
\psk at coilarmA
\psk at coilarmB
\pst at coildict \tx at ZigZag end
\psline at iii
\tx at Line
end}}
\makeatother

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \ncline{->}{A}{B}
\end{pspicture}

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \nczigzag{->}{A}{B}
\end{pspicture}

\begin{pspicture}(6,2)
  \cnodeput(0,0){A}{A}
  \cnodeput(6,1){B}{B} 
  \nccoil{->}{A}{B}
\end{pspicture}

\end{document}


  Both `pst-node' and `pst-coil' must be corrected, as they have duplicate
lines, just defining \nccoil and \nczigzag.


  + In CHANGES :

pstricks/generic:
----------------

  * 98/03/19 pst-node.tex (97 patch 5): The \nccoil and \nczigzag macros
are drawn in the wrong direction, from the ending to the starting point.
So the arrows, when defined, appear exchanged.
(reported by Wolfgang May <may at informatik.uni-freiburg.de>)

  * 98/03/19 pst-coil.tex (97 patch 2): Same problem than above.


  + In pst-node.tex :

\def\fileversion{97 patch 5}
\def\filedate{1998/03/19}
......................................................................
\def\nccoil at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998 - Patch 5
4 2 roll
% DG/SR modification end
\psk at coilwidth \pscoilheight
\psk at coilarmA \psk at coilarmB
\psk at coilaspect \psk at coilinc
\pst at coildict \tx at Coil end
end}}
......................................................................
\def\nczigzag at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998 - Patch 5
4 2 roll
% DG/SR modification end
\pscoilheight
\psk at coilwidth
\psk at coilarmA
\psk at coilarmB
\pst at coildict \tx at ZigZag end
\psline at iii
\tx at Line
end}}


  + And same in pst-coil.tex :

\def\fileversion{97 patch 2}
\def\filedate{1998/03/19}
......................................................................
\def\nccoil at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998 - Patch 2
4 2 roll
% DG/SR modification end
\psk at coilwidth \pscoilheight
\psk at coilarmA \psk at coilarmB
\psk at coilaspect \psk at coilinc
\pst at coildict \tx at Coil end
end}}
......................................................................
\def\nczigzag at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
\tx at NCCoor
tx at Dict begin
% DG/SR modification begin - Mar. 19, 1998 - Patch 2
4 2 roll
% DG/SR modification end
\pscoilheight
\psk at coilwidth
\psk at coilarmA
\psk at coilarmB
\pst at coildict \tx at ZigZag end
\psline at iii
\tx at Line
end}}


  Thanks for the report!

D.G.

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