How do I transform Rhino geometry into Grasshopper geometry.
Or Rhino UUIDs into Grasshopper UUIDs I don’t know.
This is what I try to do and I get NULL as output.
I believe the answer resides in Giulio’s answer here:
I still need to figure out if I can mass-transform objects without specifying their types explicitly.
you need to use rs.coercegeometry to return the geometry.
when you use rs.coercerhinoobject, you are returning the rhino “object”
https://developer.rhino3d.com/api/RhinoCommon/html/T_Rhino_DocObjects_RhinoObject.htm
that object has properties, one of which is geometry.
https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_DocObjects_RhinoObject_Geometry.htm
the straight rhinocommon approach might be something like this, (x being a string input with layername).
a = [obj.Geometry for obj in Rhino.RhinoDoc.ActiveDoc.Objects.FindByLayer(x)]
Neither of these work:
rh_objs = [rs.coercegeometry(obj) for obj in rs.ObjectsByLayer(layer_name)]
rh_objs = [obj.Geometry for obj in Rhino.RhinoDoc.ActiveDoc.Objects.FindByLayer(layer_name)]
I get NULL result but printing it I get the System.Guid object
You are not setting geos
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omg 
this doesn’t work? (x input type hint set to string)
import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc
# Rhino Common,don't need any scriptcontext stuff
#a = [obj.Geometry for obj in Rhino.RhinoDoc.ActiveDoc.Objects.FindByLayer(x)]
# rhinoscriptsytax
sc.doc = Rhino.RhinoDoc.ActiveDoc
a = [rs.coercegeometry(obj) for obj in rs.ObjectsByLayer(x)] #returns list of objects
sc.doc = ghdoc
It does 
I need glasses apparently 
When typing code that doesn’t do what one thought it would always first run the PEBCAK check (:
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Yah well, I am old :°
for the past 3 months or so I was python-ing only in Rhino. Didn’t touch Grasshopper and I forgot to look for such details