Ted,If you want to do 3d in groff, I think that PS is better suited for this than Pic.
Here you can define an object in its own co-ordinate system, introducemodelling transformations to help in putting together complex objects from simple
elements, and viewing transformations to rotate the object for viewing without changing its coordinates.
This is one of my old slides:
offtake.pdf
Description: Adobe PDF document
PS. Fellas, I haven't received a single post from this forum for a very-very long time. How do you manage? Do you check the archives all the time or your ISP is not taking
SpamCop so seriously as mine? Miklos
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