Surface | Curve skips the first index?

Hi, I’m using grasshopper’s Surface|Curve component to intersect my ring surface with lines that radiate from the centroid.

I’m wondering why the first radiating line does not intersect with the surface?

surface (13.7 KB)

Hello. It’s probably because of the seam position.
How about Project?

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Thank you for the reply :grinning_face_with_smiling_eyes: that helps and seems to be a smarter way to get the intersections. So does it mean that the surface is unable to intersect at seams?

Yes, I think so.