Weaverbird from Python

Hi Giulio @piac

I’d like to use Weaverbird directly from Python. Is there an example how to use it?
Or a documentation with functions, arguments etc.?

Hi @Jess

thanks for the question here :slight_smile:

If you are aiming for a simple interaction, you can use the method shown on the GH forum. It has access to all components:

You can use ghpythonlib.components.

import ghpythonlib.components as ghc
ghc.WeaverBird. #... will show Wb commands

There are also other methods, but this is the simplest one. Does it help?


Giulio Piacentino
for Robert McNeel & Associates

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You can install it by running the installer. Then you will need to add the Weaverbird installation folder to the V6 Grasshopper settings, using the _GrasshopperDeveloperSettings command. You should add “C:\Program Files\Weaverbird” there. ghpythonlib should also work in V5, provided the latest GhPython is installed.

If you still have problems in V5, check that you do not have a lot of other add-ons (I know one that makes loading other add-ons impossible in V5).

I hope this helps,


Giulio Piacentino
for Robert McNeel & Associates

1 Like

Hi Giulio,

Thanks that helps. I’ll try to make a simple Python example with some WB functions and post it here.


Fine, here a simple example with Weaverbird via Python:

import Rhino
import ghpythonlib.components as ghc
import scriptcontext as sc

def wbTest():
    plane = Rhino.Geometry.Plane.WorldXY
    width = 5.0
    sides = 3
    top = Rhino.Geometry.Point3d(0,0,10)
    mesh = ghc.WeaverBird.WeaverbirdsMeshPrism(plane,width,sides,top)
    cc = ghc.WeaverBird.WeaverbirdsCatmull_ClarkSubdivision(mesh,2)
    rc = sc.doc.Objects.AddMesh(cc)
if __name__ == "__main__":

enjoy :wink:


I remember looking into accessing the Weaverbird core .dll a while back (similar to how we’ve been implementing Kangaroo2, Plankton etc), would this be one such approach?


Yes, exactly, but they are not so straighforward, because they were not written with Python in mind (nor third-parties in mind).

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