This node selects the corresponding edge rings by specifying the edge index. which is very similar to edge rings in blender editing.

vert,edge,face: Basic geometric data

edgeindex: Initial edge index

threshold: The difference threshold when selecting rings edges in edge mode, the value is valid between -1 to 1,with smaller values the more rings edge are selected.

edge: Select rings edge by edge structure

face: Select rings edge by face structure

Selected rings edge index

1 Node is the initial state, please feedback in time if you have any questions

2 The ultimate goal of the node is to merge into the backbone

3 The node imports the corresponding .json file using the sverchok import function Thank you very much for your support before this, let me concentrate on this

https://youtu.be/HOskq7jrzNk