[pstricks] pst-rubans and 2d-arrows

[Herbert Voss]

Am 06.11.2015 um 22:16 schrieb Poul Riis:
> 1) How can I get rid of the green arrow at the center in the project
> below? (in fact there is a read arrow behind it)
> 2) How can I put a centered R above the red arrow without specifying
> coordinates - something like \naput[labelsep=0.1,npos=0.5,nrot=:U]{$R$}


> \begin{pspicture}(-5,-5)(5,5)
> \psset{viewpoint=0 50 50,Decran=50}
> \psSpiralRing[r1=4,r0=1,fillcolor=blue,incolor=gray!50,grid,dPHI=0.5,spires=40,resolution=1440]%
> \axesIIID[showOrigin=false,axisnames={},arrows=<->,linecolor=Red1,linewidth=2pt](0,0,0)(4,0,0)

use a simple \pcline:

\documentclass[12pt,a4paper]{article}
\usepackage[left=2cm,top=1.25cm,right=1.5cm,bottom=2.5cm]{geometry}
\usepackage[svgnames,x11names]{xcolor}
\usepackage{pst-rubans}

\begin{document}

\begin{center}
\begin{pspicture}(-5,-5)(5,5)
\psset{viewpoint=0 50 50,Decran=50}
\psSpiralRing[r1=4,r0=1,fillcolor=blue,incolor=gray!50,grid,dPHI=0.5,spires=40,resolution=1440]%
\pcline[arrows=<->,linecolor=Red1,linewidth=2pt](0,0)(-1,0)
\naput*[labelsep=0.1,npos=0.5,nrot=:U]{$R$}
\pcline[arrows=<->,linecolor=Green3,linewidth=2pt](0,0)(1,0)
\end{pspicture}
\end{center}
\end{document}


Herbert