[pstricks] pstricks-add: psCircleTangents: can't access node at postscript level

[Johannes Deutsch]

On Tue, 14 May 2013 12:31:38 +0200
Alfred Epple <af.epple at t-online.de> wrote:

> The drawing is on the next page while the first page remains empty. I
> guess the graph takes too much space so it does not fit onto the
> first page. (see screenshot below)

I didn't see that. Thanks for the hint.

Nevertheless the shown picture is still faulty. The command in line 16
should connect point (2,2) with the point where the second tangent line
meets the circle around point (-2,-2). Just like it's described and
shown in the pstricks-add documentation.

Strangely if i replace line 16 by

	\psline(2,2)(CircleT2)

everything is drawn correctly.

Unfortunately i need to calculate with the coordinate center of
CircleT2 at postscript level. But that is precisely what doesn't work.

Best regards and thanks for contributing

> 
> Cheers Fred
> 
> Am 14.05.2013 um 12:10 schrieb Johannes Deutsch <j_deutsch at web.de>:
> 
> > Hi all,
> > 
> > the following code as is, compiles fine with pdflatex.
> > 
> > If i uncomment line 16 the picture isn't drawn anylonger. 
> > 
> > Unfortunately i can't find any errors in the log, too.
> > 
> > Maybe someone around here can help me to find the error or maybe i
> > can help chasing a bug!?
> > 
> > With best regards
> > 
> > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> > 
> > \documentclass{article}
> > \usepackage{auto-pst-pdf}
> > \usepackage{pstricks-add,pstricks,pst-node}
> > \begin{document}
> > 
> > \psset{saveNodeCoors}
> > \begin{pspicture}[showgrid](-4,-4)(4,4)
> > 
> >    \pscircle(-2,-2){0.5}
> >    \psdot(2,2)
> >    \psCircleTangents(2,2)(-2,-2){0.5}
> > 
> >    \psdots(CircleT1)(CircleT2)
> > 
> >    \psline(2,2)(! N-CircleT1.x N-CircleT1.y)
> >    %\psline(2,2)(! N-CircleT2.x N-CircleT2.y) % line 16
> > \end{pspicture}
> > 
> > \end{document}
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