Extrude Along Curve going wrong direction sometimes

Grasshopper
1

I’m trying to extrude some hexagons along computed curves. In preview, the the hexagons and curves look happy:

hexavase-paths

But when actually extruded, some of them go the wrong direction, and seem to flip the curve in the Z axis before extruding:

hexavase-result
hexavase-result.PNG538×647 38.9 KB

I’m at my limited wits’ end. Thoughts on what’s going on here?

hexavase.gh (17.5 KB)

2

I just cleaned up some of your trees/null values. See attached.

hexavase_rev3.gh (18.4 KB)

3

Extrude along curve does not rely on the actual location of the curve, only the curves shape and direction. That shape is interpreted from the profile onward. (Essentially a sum surface). The flipping is because some of your curves are flipped (they start at the higher point of the curve and are drawn downward). Flip those curves direction.

4

Thank you! That’s been bothering me.