Hello I need to align the green arrow toward the center in Geo Nodes. I can not figure it out! Please could someone help me.
I would like the green arrows to all point toward the center but I don't know how to do it. I have to align the normal of the center of the curve maybe?
These are curves with a profile extruded along the curve. I need the flat part to face toward the center
This may be similar to @common_goldfish's one - but since I saw the trouble investigating, I put it here also.
One thing I added is the 'Set Curve Normal' node and sampled a small centered icosphere's surface to get some normals. Could work for entirely spherical structure.
See if it helps:
My suggestion is to grab some information from the icosphere before you convert it to curves.
It is easier to get the information you want at the beginning: you only need a couple nodes (align euler to vector + normal node).
In order to transfer the rotation of the normals of the input geometry you can use the sample nearest and sample index nodes (which are used to transfer attributes) to push the information along. (I did not copy your tree exactly, not having your .blend):
You can make adjustments with the rotate instances node. Then when you instance at the ends of your profile curves, you can choose which side, in this diagram indicated by the green arrows, will point towards the centre.
