Projecting verticals on a brep/vertical contours

Hello,
I am trying to project verical lines on to a brep, but for some reason i get to groups of lines,
the ones that is corresponding with what a want and a set of distorted lines which are not maintainig a z direction.

i guess im missing a flatten or something but i am not able to find it.
Help pls.

vertical contour.3dm (194.9 KB)
DIVIDE AND ROTATE.gh (8.0 KB)

Hi,

since you have a closed surface you get 2 curves on surface from one projected curve, now you have to filter them somehow…
but i guess you are looking for the pull component

image

Hey, thanks for the comment,
but i dont get it,
i used the pull, and got exactly the same resault,

look into the modified solution, maybe the projection is still set bt be visible

DIVIDE AND ROTATE.gh (9.8 KB)

thank you