Hi Michael

My mistake, the error is on the small end.

I think when I drew this I must have used the side view to snap to that last point. Because the small end curve isn't exactly perpendicular to the view it finds the nearest "on" which ends up slightly off.

When using perspective view to draw the first and last points of the scaling rail, all is working well. I cannot recreate any errors.

Sorry for the red herring.

Hi Kevin, no problem, let me know if you run into another kind of problem case in the future.

You wrote:
> I think when I drew this I must have used the side view to snap to that last point.

Yeah that can cause this kind of result because "on" snap (same as any object snaps) in the 2D views like the side view will get projected to the current drawing plane. That's so that when you're drawing things in a 2D view that you'll also get a planar result.

You can change that behavior with a setting under Options > Snaps > Object snap options > "Project to plane in ortho views" checkbox. When you unset that then object snaps will go directly to the 3D point snap location with no projection. But that also means that things that you draw in 2D viewports can be easily non planar curves squiggling around in 3D.

By default that projection is enabled so that in 2D viewports there's an emphasis on generating 2D results but picking points in the 3D viewport lets you do freely squiggling stuff.

- Michael

Thanks for the response, I much prefer projection being enabled without having to setup a workplane or cplane. Its a much more intuitive way to draw things in 3d.

Just got to remember that there is a disadvantage to this functionality when you work in the ortho views.

Yeah I've run into that problem w/the sweep and didn't understand why the bunches at the end were happening as well!


It would be great, Michael if you could internally make the curve extension - it's helps avoid breaking the "modeling zen" where "stuff just works" as expected.


-Will