[pstricks] conic sections 2

[Herbert Voss]

juanleal at cantv.net wrote:
> Maybe I didn't explain myself very well.
> 
> I want you to help me, not a beginner in the use of pstricks, to draw 
> via pstricks figures like those I have attached to this email.

this is all possible with the basic package pst-3d and
if you like it more comfortable with pst-vue3d.
However, there is no "ready made" solution.

Herbert