[pstricks] surface plot

[Herbert Voss]

Am 12.01.2011 22:42, schrieb "Aydın ÜSTÜN":

> Thank you for this example. I worked on it again for producing the contours on 
> the surface and their level lines on the xy plane. It was not easy since the 
> function (and its parametric equation) is diffucult to study. Maybe, the 
> intersections between the surface and z=const. planes can be used for reducing 
> into a specific plane like xy.

Hello Aydin,

it is now in the gallery part of http://PSTricks.tug.org

Herbert