one rail sweep problem...

Hi everyone,

I’m having a problem with the one rail sweep. I apologize if this has already been answered elsewhere but I haven’t found a solution.

The sweep works as long as the guide curve is relatively straight. As I manipulate the control points to give more curvature to the referenced curve, the surface looks like it starts to kink. However, if I bake and examine the circles, they all appear to be in the same direction. In fact, I can create a one rail surface with no problems.

Am I overlooking something obvious?

Thank you,

cbass

Attachments:

1 rail sweep problem.gh, 3 KB
1 rail sweep problem.3dm, 18 KB

Replies to This Discussion

Permalink Reply by Pieter Segeren on August 26, 2011 at 3:56am

Hi cbass, if you create the circles on a PFrame they will be aligned correctly.

Permalink Reply by cbass on August 26, 2011 at 9:48am

Pieter, I had totally forgotten about the PFrame component. I remember a thread mentioning the PFrame approach, but I didn't think that was a problem in my case. Thank you for your help!

The circles in the non-PFrame version looked fine... Any idea why the PFrame needs to be used? Or is it one of those things that just "is"?

cbass

Permalink Reply by Pieter Segeren on August 26, 2011 at 3:08pm

it ensures the 'startpoints' of the circles are aligned, and that none of the circles get drawn flipped. Hope the image expains what I'm trying to say...