[pstricks] node connections between corners of a rectangle

[vin gui]

>   The straightforward solution here is to use the "ref" parameter (see the
> documentation), which is accessible with \rnode has a special optional
> parameter.
> 
> \documentclass[a4paper]{article}
> 
> \usepackage{pst-node}
> 
> \begin{document}
> 
> \rput(0,0){\rnode[br]{node1}{\psframebox{$G_1*G_2$}}}
> \rput(3,-2){\rnode[tl]{node2}{\psframebox{$H$}}}
> \ncline{node1}{node2}
> 
> \rput(6,0){\rnode[tl]{node1}{\psframebox{$G_1*G_2$}}}
> \rput(9,-2){\rnode[br]{node2}{\psframebox{$H$}}}
> \ncangles[angleA=90,angleB=0]{node1}{node2}
> 
> \end{document}

This is exactly what I was after.
Many thanks !

Sorry for not having noticed it in the doc...

Vincent.