Outline after several parts

Hi guys, I have a picture like this

and I would like to turn it this way
, there is definitely a shortcut to Rhino 6 but I don’t know what it is. Can you help me? Thank you

No there’s no shortcut for that, that’s a very particular procedure. You would need to Explode the separate bits, extend some segments, then trim everything up, maybe CurveBoolean would speed up that last step a bit.

Thank you, yes I tried this, I thought there was a simpler procedure.