[pstricks] Right angle symbol in a 2D Projection

[Juergen Gilg]

Dear list,

i am messing around how to make the right angle symbol from _pst-eucl_ 
look much better in a 2D projection of a 3D arrangement...

Shouldn't it be elliptic there instead of a part of a circle to show the 
3D effect. I know that is not the idea of _pst-eucl_. However i had no 
other idea to adjust the right angle better than with _pst-eucl_.
There is no will to act in 3D coordinates. Just the idea for the 
projection and better looking.

Any ideas how to refine the following right angle symbols to show the 3D 
character of the graphic a bit better in 2D?

%% begin minimal example %%
\documentclass{article}
\usepackage{amsmath}
\usepackage{pst-eucl,pstricks-add}
\begin{document}
\begin{pspicture}(-1,-3)(7,3)%\psgrid
\psline{->}(0,0)(4,-1)
\psline{->}(0,0)(2.8,1.9)
\psline{->}(0,0)(0,2)
\psline{-}(2.8,1.9)(6.8,0.9)
\psline{-}(4,-1)(6.8,0.9)
\pstTriangle[PointSymbolA=none,PointSymbolB=none,PointSymbolC=none,PointNameA=none,PointNameB=none,PointNameC=none,linewidth=0pt,linestyle=none](0,0){A}(2,-0.5){B}(1.4,0.95){C}
\pstTriangle[PointSymbolA=none,PointSymbolB=none,PointSymbolC=none,PointNameA=none,PointNameB=none,PointNameC=none,linewidth=0pt,linestyle=none](1.4,0.95){D}(0,0){E}(0,2){F}
\pstTriangle[PointSymbolA=none,PointSymbolB=none,PointSymbolC=none,PointNameA=none,PointNameB=none,PointNameC=none,linewidth=0pt,linestyle=none](0,2){G}(0,0){H}(2,-0.5){I}
\pstRightAngle[RightAngleType=german,RightAngleSize=0.6]{D}{E}{F}
\pstRightAngle[RightAngleType=german]{I}{H}{G}
\pstMarkAngle[MarkAngleRadius=1.3,LabelSep=0.9,arrows=->]{B}{A}{C}{$\alpha$}
\resetOptions
\psellipticarc{->}(0,1.4)(0.2,0.11){120}{420}
\end{pspicture}
\end{document}
%% end minimal example %%

Thanks in advance,

Juergen

-- 
 Jürgen Gilg
 Austr. 59
 70376 Stuttgart
-------------------------------------
 Tel       0711.59 27 88
 e-Mail    gilg at acrotex.net
 Websites  www.acrotex.net
           www.brueckenkurs-physik.de
           www.gilligan-online.de

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