How to offset then extrude on a surface?


#1

How do I offset then extrude on a surface. I’m accustomed to Sketchup, the offset ring becomes it’s own extrudable surface.

OffsetNormal gave the vertical offset.
OffsetCrvOnSuf gave me the correct offset, but its just another ring and does not segment the surface and allow it to be extruded separately. I realize there are several ways to create/extrude the ring. However, I was wondering if Rhino had a way to replicate the way it works in Sketchup?


(Brian James) #2

Use ExtractSrf on the top surface and then Split it with the Offset Crv you made. Join it all back together and you’ll have a sub-object selection or separate surface in the Polysurface for the ring you wish to extrude. Does that help?