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

vert,edge,face: Basic geometric data

edgeindex: Initial edge index

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

edge: Select loop edge by edge structure

face: Select loop edge by face structure

Selected loop 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

edge_path to seam

https://youtu.be/tHXRdEZ3yHQ