Stuck in Grasshopper-Python Recursion

[chanley (Chris Hanley)]

It sounds like you might be wrestling with the concept of scriptcontext.

Understanding scriptcontext vs ghdoc

Just one quick addition to the informative text by Djordje: scriptcontext.doc is the variable that is used all the time by rhinoscriptsyntax to access the active document. You can imagine that, before running a script in Rhino, the EditPythonScript editor assigns the open model to that variable. Also, before GhPython runs, it assigns the active, hidden Grasshopper document to that variable, so that you will use a document that is better suited for Grasshopper (it’s not having to keep track of u…

not that you have to switch between the two for your script to work, it just may help you understand how Rhino sees geometry VS how Grasshopper “sees” geometry.

see if this helps:

import rhinoscriptsyntax as rs

#you need to store the geometry that GH creates somewhere
circles = []

def RecursiveCircle(pt, r):
    if r == 0:
        pass
    else:
        #recursion loop starts here
        #do something: make circle and add to list (Grasshopper document)
        circles.append(rs.AddCircle(pt, r))
        #change your variable by something
        r -=1
        #call your function again with updated variable
        RecursiveCircle(pt, r)
        #do this until your if statement/condition is met

try:
    #call your function
    RecursiveCircle(pt, r)
except:
    pass

a = circles