[pstricks] projected mathematical label with,,> pst-solides3d

[mathias legrand]

>
> \documentclass{article}
> \usepackage{pst-solides3d}
> \begin{document}
>
> \begin{pspicture}(-3,-3)(4,3.5)%
> \psframe*[linecolor=blue!50](-3,-3)(4,3.5)
> \psset{viewpoint=50 30 15,Decran=60,solidmemory}
> \psSolid[object=plan,definition=equation,
>      args={[1 0 0 0] 90},planmarks,name=monplan]
> \psProjection[object=texte,PSfont=Symbol,
>    fontsize=20,plan=monplan,text=a](-2,1.25)
> \end{pspicture}
>
> \end{document}

thanks. Will this be later generalized to full mathematical equations, 
like $\int_0^1 \cos\pi=..$ ? that would be nice.