[pstricks] pst-3dplot

[Herbert Voss]

Pedro Jorge Caridade wrote:

> I'm getting a strange result when using pstTheeDCircle (maybe i'm doing 
> something wrong, or did not understand the documentation). I want to 
> draw a circle in the xy plane with z=0. For this I use \pstThreeDCircle 
> (0,0,0)(2,0,0)(0,-2,0). However when I am plot it with Alpha=180 and 
> Beta=90, i.e., z axis perpendicular to the paper and pointing toward us, 
> I get an ellipse.
> Am I doing some wrong? I think the vectors for the definition of the 
> ellipse are perpendicular, as mention in the documentation.

> \documentclass{minimal}
> \usepackage{pstricks,pst-3dplot}
> \begin{document}
> \begin{pspicture}(-5,-5)(5,5)
> 
> \pstThreeDCoor[Alpha=180,Beta=90,xMin=-3,yMin=-3,zMin=0]

Documentation, p.6

Herbert