Passing geometries to a Grasshopper definition on a compute server

[jbudau (JPB)]

Hey,

I am currently setting up a local compute server to run a Grasshopper definition with python.
The Grasshopper definition will later process.3dm files automatically. For this, it is necessary to load certain geometries from the files.
My first approach was to leave my existing Python script in place within Grasshopper and load the .3dm files directly into Grasshopper using IronPython, passing only the file path to the compute server. However, it appears that these Python scripts are not executing.

Next, I tried opening the .3dm file in Python using the rhino3dm library and passing only the required geometries to Grasshopper. For this, I built the program like in the tutorials and named the groups like this: “RH_IN:xxx”. However this does not seem to work for the “geometry” component.
Then I found the following entry from Steve Bear:

Grasshopper within compute.rhino3d

The latest version of compute lets you use the “Get” components for defining inputs and is what I would recommend to use going forward. By “Get” components, I’m referring to “Get Point” “Get String” “Get Number” “Get Geometry” … You shouldn’t have to use named groups for inputs anymore if you use these components. Compute will find all of the “Get” components in a gh file and make those the inputs using the names of the components themselves. Compute still supports the named groups as input…

So now I used the “Get Geometry” component.
My current problem is that I can now only pass a single (but arbitrary) geometry and not a tree.

Does anyone have any idea what I am doing wrong?

My line of python code:

geoTree = rcgh.DataTree(“RH_IN:geos”)
for i, geo in enumerate(layerGeo):
geoTree.Append([i], [json.dumps(geo.Encode())])

And in Grasshopper I’m using the “Get-Geometrie” Component with the name

RH_IN:geos

[stevebaer]

Please make sure you are using the latest version of Hops. Andy Payne covers how to set tree access for inputs in his short intro video that he just posted.

Getting Started with Hops

I just wanted to let everyone know that I’ve just published a short tutorial covering the basics of Getting Started with Hops. I hope this covers most of the introductory level topics, but please let me know if you have any follow up questions or suggestions.

[jbudau (JPB)]

Hey @stevebaer,
Tanks for your quick reply.

I’ve got the latest version of Rhino 7 and the latest version of Hops (0.14.1) installed.
Unfortunately, the option “Tree Access” is not available for me.

[stevebaer]

@AndyPayne do you know which service release of Rhino 7 you added the tree option for the context get components?

[AndyPayne]

@jbudau and @stevebaer You need to update to Rhino 7.19.22130.15001 or Rhino 8.0.22131.04306 or higher. The Contextual Get components were updated in those service releases.

[jbudau (JPB)]

Thanks for the help! Now it works like a charm.
I hadn’t found that version because it was only classified as a release candidate.