How to get the surface boundary base line

Geometry
1

Hi guys:

How to get a selection of multiple surfaces at the bottom border ?
How to fix this ?
Thanks!

TSF-0229-w2-Q1.dyn (3.0 KB)

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2

you may start by extracting the Z vector from the end & start point for each of the curves. let’s assume the " base " is @ 0.00 … so the curves that have a Vector Z = Zero in both start & end point of the curves are the ones you are looking for. give me a bit of time and i’ll post the solution

3

@Dornan_Luke Check this out.

12.PNG1364Ă—574 72.6 KB

if your reference which is the “base level” has changed then all you have to do is change the values in the code block {{0,0}} to match your desired level. & keep an eye on the lacing in the nodes. good luck !

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