[pstricks] It might be a bug in finding angle

[Luis Sequeira]

There is a bug in your code... 

In the second version, you have 

\psarcn[origin={O},linecolor=red]{->}(3,3) ....

You set the origin at (O), which has coordinates (3,3) so now your center (3,3) is actually at (3,3)+(3,3), as appears in the picture.

You should write just 

   \psarcn[linecolor=red]{->}(3,3) ....

or (perhaps better, since it retains the fact that your coordinates are relative to (O)):

   \psarcn[origin={O},linecolor=red]{->}(0,0) ....


Luis Sequeira


> Subject: [pstricks] It might be a bug in finding angle
> Message-ID:
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> Content-Type: text/plain; charset="iso-8859-1"
> 
> Dear Mr. Herbert,
> 
> I found a bug in PSTricks.?
> 
> Even though the points (O) and (3,3) represent the same point,
> the second pspicture produces an arc at a wrong pivot.?
> 
> 
> 
> \documentclass[pstricks,border=1cm]{standalone}
> \usepackage{pst-eucl}
> 
> 
> \begin{document}
> 
> 
> \begin{pspicture}[showgrid=top](9,8)
> \pstGeonode(3,3){O}(5,5){A}(5,1){B}
> \pscircle[linestyle=dashed](O){2}
> \psarcn[origin={O},linecolor=red]{->}
> (O)%<=============== COMPARE THIS ONE
> {2}{(A)}{(B)}
> \psline(A)(O)(B)
> \end{pspicture}?
> 
> \begin{pspicture}[showgrid=top](9,8)
> \pstGeonode(3,3){O}(5,5){A}(5,1){B}
> \pscircle[linestyle=dashed](O){2}
> \psarcn[origin={O},linecolor=red]{->}
> (3,3)%<================ WITH THIS ONE
> {2}{(A)}{(B)}
> \psline(A)(O)(B)
> \end{pspicture}?
> 
> \end{document}
> 
> Thank you in advance.
> 
> 
> best regards,
> 
> Higgs Boson
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