How do I define where the seam of Unroll developable surface is?
My ultimate goal is to have various features intersecting the extruded surface in the attached picture, then do a trim command to cut the holes in the extruded surface and then unroll the surface.
By default Rhino chose the location indicated by the RED plane to be the seam, but I want to choose the seam location to be the Green plane. Any suggestions appreciated.
_SrfSeam has been suggested but it is not working for me as it asks for a closed surface and this shape does not qualify.