Reverse the normals of curves

[elenachiridnik]

Hello all,
I am trying to reverce all the “inward” normals of the multiple curves by checking the negative y coordinates of the vectors, so all the spickes are in the same direction. I am stuck at not getting more than one index of them. I guess working with multiple elements is not so promising with “replace item at index” also.
Could someone help me with this solution, or is there some other easier way?

[T_Pover]

Try the List.AllIndicesOf node instead of IndexOf

[Mohammadz]

Check this out

Rotate Model elements to be Normal to Curve

Hi Mostafa, Thanks for the answer. I tried it and it worked…almost. The normals/planes/coordinate systems along the curve flip and cause the orientation of the components to flip. I solved this by not using an adaptive component or structural beam but by extruding a curve as a solid using a distance and direction. (I tried the solid loft node but it broke citing orientation issues). Is there a way to unify the normals? Why are they flipping? I’ve attached the definition and image of the …

[elenachiridnik]

Thank you, Mohammadz!
One string of code from Mostafa_El_Ayoubi to reverse the normals is much more elegant then all the blocks

[elenachiridnik]

Thank you, T_Pover!
recursive ReplaceItemAtIndex from Clockwork also helped.