How can I produce the reflection of a pstricks image in pstricks?

Question

I defined some small pstricks makro:

\begin{pspicture}(-5,-5)(5,5)
    \newcommand{\leftwall}{%
    \psline(-4,-4)(-4,4)
    \multips(-4,-3.5)(0,0.5){14}{\psline(0,0)(-1,1)}
    }
    \leftwall
\end{pspicture}

And now I want the output of \leftwall reflected, to produce something like \rightwall. In this specific situation, I could just change the signs of the x coordinates, but this is ugly. How can I do this in general? I'm looking for a command like \psrotate from the pstricks-add package where I can specify two points that define a line along which I can reflect my \leftwall.

Answer 1

extend the example in a case that \leftwall and \rightwall allow coordinates to get rid of the \rput

\documentclass{minimal}
\usepackage{pstricks}
\newcommand\leftwall{%  
  \psline(-4,-4)(-4,4) 
  \psframe[linestyle=none,fillstyle=vlines](-4,-4)(-4.75,4)}
\newcommand\rightwall{\psscalebox{-1 1}{\leftwall}}
\begin{document}

\begin{pspicture}(-5,-5)(5,5) 
 \leftwall \rput(0,0){\rightwall}
\end{pspicture} 

\end{document}