Offset points of nurbs curve

[Mu_Jica]

Hi All,
I’v created topic about [AdaptiveComponent Unwanted Rotation]

(AdaptiveComponent Unwanted Rotation)

AdaptiveComponent Unwanted Rotation

Hi All, I’v got almost every techniques for dynamo and revit from you. I deeply appreciate it… and today, I brings 2 questions about AdaptiveComponent.by points I made this graph [Capture] and I found 2 problems I made family like this [K-007] but some families has rotated. [K-006] I want to my families to be drawn unrotated… where is the problem? Should I make this family in other way? or there has some missing stuffs in graph? T1002243E2A라이닝.rfa (388 KB) Tunnel Structural F…

and Jacob gave me a hints that create new point along the z axis.

but my curve is 3D and some complex, so I cannot find a offset points and how to find it.

I want to find the “offset points” of the points that along 3D curve line.
and then try to control the rotation by creating a new point in the Z direction in the family and applying that point to the offset point.

I think that I can control the rotation of unwanted families as shown below.

How can I find offset points and control it…?