[pstricks] Right angle symbol in a 2D Projection

[Juergen Gilg]

Dear Herbert, dear Michael,
> here is a solution with pst-3dplot
>
> \documentclass{article}
> \usepackage{pst-3dplot}
> \begin{document}
>
> \begin{pspicture}(-3,-3)(3,3)
>  \psset{Alpha=30}
>  \pstThreeDCoor
>  \pstThreeDLine(3,3,0)(0,0,0)(-3,3,0)
>  \pstThreeDEllipse[arrows=->,arrowscale=1.5,
>    endAngle=90](0,0,0)(1,1,0)(-1,1,0)
> \end{pspicture}
>
> \end{document}
>   
Convinced! I wanted to avoid 3d, however it is more precise that way!!!

Thanks a lot,

Juergen

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