Geometry Node - How to instance objects along the "flow" of a surface

Support Modeling
1

Hi everyone, I’m stuck at this simple task, can anyone help me with that? I want to instance objects along the “flow” on a surface (I don’t know how to put it in correct terms, but let me try to sketch what I mean)

gn-question-1a
gn-question-1a1642×1265 335 KB

What I managed to do is just this, where the direction of the cones are not pointing in the “flow” direction.

gn-question-1b
gn-question-1b1642×1265 280 KB

How can I achieve thatt? Thank you very much if you could point out a way!

I attached the blend file if you want to test on it.
gn question 1.blend (1.4 MB)

2

You need to create additional directional vectors to align it but currently there is no easy way of doing it

Here is node group that creates directional vector pointing from face center to its edge, it might not work on all meshed because its depending on vertices indices order

image
image1913×994 329 KB

gn question face tan.blend (234.2 KB)

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3

Hey, thank you so much for this! :+1: :+1:
This Looks amazing :fire:, I need to figure out why it works like this!

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