Hi fonthill,
EDITED:
This answer is for creating a helix, not a spiral.
Sorry, my mistake…see my second post below
Shapr3d has an elegant method for creating helixs:
- draw circle of desired radius
- extruded circle to create cylinder
- pick point at intersection of seam and circle
and commence line on surface on one side of seam - without lifting pencil, cross over to opposite side of
seam, to intersection of circle and seam at the other end of the cylinder. - delete cylinder.
It can be a bit finicky, but persistence will pay off.
Hopefully with further development, there will be means to pick end points of helix line for adjustment.
And ideally an option for inputing the number of revolution of the helix (or alternatively: number of degrees i.e. 720 = 2 revolutions)