[pstricks] Node and tree ?

[Herbert Voss]

JBD wrote:

> How to precisely position arrows which join various elements of a tree? 
> Thus, I made a tree of the type \pstree{\Tr{A}}{\Tr{B}\Tr{C}}
> and wishes to connect C to B or C with A. So, it is necessary that I 
> insert \rnode, but how? I tried \rnode[bl] for example, but without 
> success. I manage well to obtain these arrows, but not to control by 
> where they pass. Often, they go to shortest, overloading
> the medium of the figure, whereas I would like that they pass round it. 

Do you want something like this?

\pstree{\Tr{A}}{\Tr[name=B]{B}\Tr[name=C]{C}}
\ncline{->}{B}{C}

Herbert