[pstricks] Coordinates in pst-3dplot

[aq.it at tiscali.it]

Dear Herbert,

thank you very much for your many beautiful pst-xxxx packages.

In pst-3dplot is possible to use cartesian and spherical coordinates.
What about cylindrical coordinates (r,\phi,z) ? Will you implement
them?
I personally use much more cylindrical coordinates than spherical.
And actually would be nice to be able to use cylindrical
coordinates (and spherical) for plotting functions as well.

My best regards

Antonio