when doing a 3dspiral in 3d space in autocad by lisp
the 3dspiral is made by a bunch of 3dpolylines. when i go
to extract an object by path it rotates along the 3dspiral.
that is a problem cause by some default acition it must be
perpendicular to some plane (as i understand). basically
i can not make a screw in 3d space because when i want to
subtract the 3d spiral from the cilinder (which represents the
body of the screw) the 3d spiral is all twisted. of caourse if u
didn't extract by path a circle (the rotation is present but not
significant because of the unique shape of the circle :-))
but in truth that is not the proper look of the screw....
help would be appreciated
tnx
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