TUBE problems

[Bruce]

I'm developing a bent spring object, using the TUBE command. I've got the maths working, but unfortunately, the TUBE command puts small creases in the profile as it starts to go over the bend. You will also see some large twists near the apex.

I've have tried playing with the angle parameter, but it has little effect.

I've conferred with some colleagues, who are confident this is either a bug, or beyond the capacity of TUBE to deal with.

Any ideas?

[Bruce]

This has been answered in the GDL Centre forum: http://gdl.graphisoft.com/forums/topic/tube-twisting

Apparently they have introduced a macro to deal with this issue.