[pstricks] Geradenbüschel
Christoph Bersch
usenet at bersch.net
Thu Sep 9 13:23:46 CEST 2010
Hi,
Hendrik Maryns schrieb:
>
> What I like is several (say, 4), lines that go through one point, say
> (7,10) in different directions. That would be easy if it weren’t so
> that I’d like those lines to protrude in both directions. This is a
> thing which in projective geometry is known as a ‘Geradenbüschel’, a
> bundle of lines.
>
> Something like this:
> http://mathenexus.zum.de/html/extemporale/11T/1/E1_A1_11TA_A11130_images/IMG0074.PNG
>
> but without the axes.
a simple, not really soffisticated example:
\documentclass{scrartcl}
\usepackage{pstricks}
\usepackage{multido}
\SpecialCoor
\begin{document}
\begin{pspicture}(10,10)
\rput(5,5){\multido{\ii=-20+10,\ij=-200+10}{5}{%
\psline(3;\ii)(3;\ij)
}}
\end{pspicture}
\bigskip
\begin{pspicture}(10,10)
\rput(5,5){%
\begin{psclip}{\psframe[linestyle=none](-2,-1)(2,1)}
\multido{\ii=-20+10,\ij=-200+10}{5}{%
\psline(3;\ii)(3;\ij)
}%
\end{psclip}
}
\end{pspicture}
\end{document}
Christoph
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