Vertices indices.


I have a mesh and selected vertices. I put the indices of the selected vertices in a list (= A). I selected other vertices. The problem is when I do a separate selection on the mesh (with A and the other selected vertices), the indices of the new mesh vertices are completely different from the first one (no matches). How can I know on the new mesh the matches with A in the old mesh ?

Do you duplicate the mesh during the process?

Mesh element sorting might help. Otherwise, you need to approximate based on location.

I didn’t duplicate before separating.
I don’t know how mesh element sorting can help :o I think I need to approximate even if it’s too much time consuming, thank you!