Extracting Edge Loops in Rhino

Tips and tricks for a beginner using Rhinoceros 3D

One of the most useful things you can do when working with a mesh and reverse engineering it is to get the edge loops. For nurbs, use the command ExtractIsocurve. For mesh/subd, use the SelectionFilterEdges command (described here).

1. Select the edges that you want — click on one edge, then the adjacent edge in the loop that you want.
2. Use DupEdge to duplicate the edges.
3. Use Join to join the broken edge pieces into a curve.
4. SelectionFilterNone to turn off the selection filter.
5. (OPTIONAL) Use Simplify, Rebuild, etc. to cleanup the result.

An example of the workflow demonstrated in the Rhino screenspace