algorithmic modeling for Rhino



Welcome to Metahopper - a tool for controlling Grasshopper with Grasshopper :)

This library contains a number of components and commands for querying and manipulating Grasshopper components dynamically. You can retrieve components and objects based on their type, their library, the group they're in, or by selecting them directly - or even get all the objects in a document at once. You can then retrieve information about these components + parameters, the libraries they belong to. You can also manipulate objects directly: enabling/disabling, turning preview on and off, changing the color of groups, the text and size of scribbles, and the shape of sketch objects.

MetaHopper also adds a new menu to the Grasshopper document editor, that wraps up several functions:

BestPracticize Selection lets you pick a group and auto-insert params for all the inputs and outputs coming into/out of the group. This makes for nice, tidy functional groupings that make your Grasshopper code easier to read. 

Save Snippet improves on an earlier script I released - it lets you select any group of components + objects and save them as a single user object - without needing to cluster them. This is useful when you want things saved that have internal UI elements - like a graph mapper or slider for instance - that you want to be able to manipulate with the reusable chunk of code you're saving.

Bottleneck Navigator opens up a window that lets you see all the components in your definition, sorted by their "Runtime" - how long it took them to execute. You can click on any item in the list and zoom to it instantly - so that you can find opportunities for optimization in your definition.

Download it here!

Members: 228
Latest Activity: Mar 15

Component Listing


Set Group Properties

Set the name, color, and style of a group.

Control Wire Display

Control the display of wires for parameters and components.

Set Scribble Properties

Set the text, size, and font of a Scribble.

Hide/Show Object Preview

Programmatically control the preview visibility of specified objects

Rename Object

Programmatically set the nickname of specified objects

Enable/Disable Object

Programmatically enable/disable solving for specified objects

Set Sketch

Modify the form of an existing sketch object.

Bake Object

Programmatically bake the geometry of specified objects

Wire Display Toggle

Switch all document wires between hidden and faint.



Converts a standard GH Slider into a variable input to the Batch Driver

Batch Animator

Saves a screenshot of every state of the model in the batch to a folder.

Batch Variable from List

Converts a list of values such as a series or range into a variable input to the Batch Driver


Run a batch analysis across a range of variable parameters


Param Info

Gets information about param objects

Object Info

Gets basic information from any DocumentObject

Assembly Info

Gets information about an assembly

Component Info

Get information about a component object. Retrieve components with Document Info, Get Attached Component, or Get Selected Component.

Document Info

Get information about the GH document and its components

Object Retrieval

Get Groups

Get all groups in the document

Get Connected Objects

Gets all components and params connected to this component

Get Objects of Same Library

Gets all components and params that are from the same library as the attached.

Get Selected Objects

Get the objects currently selected on the canvas

Get Scribbles

Get all Scribbles in the document

Get Objects of Same Type

Gets all components and params that are of the same type as the attached.

Get Objects in Group

Gets all components and params in the same group as this component (or the specified group if supplied)


Best Practicizer

Takes a selected group and inserts input and output params at both edges for any data that goes outside the group.

Highlight Objects

Highlight objects by adding them a new group

Set Object Value

Tries to set the value of an object. What value it sets varies by type - it sets a slider’s numeric value, a panel or scribble’s text contents, etc

Relative Path

Appends the directory this definition is saved in to a file path. Auto-converts the contents of a text panel containing an absolute path

Discussion Forum

how to save snippets... in the new version

plsthe most  attractive functionwheres it nowthank you very muchContinue

Started by weilai Apr 10, 2019.


Please refer all metahopper-related questions to the metahopper category on discourse: …Continue

Started by Andrew Heumann Nov 1, 2018.

Enable/Disable inside of clusters 2 Replies

Hi Andrew,I am attempting to use your Enable/Disable toggle inside of a cluster and it does not appear to work.  Is it possible I am doing something wrong or is this a known issue?Your plug-in is…Continue

Started by Ben Pearce. Last reply by Ben Pearce Jul 11, 2018.

Enable/Disable not working properly inside a Cluster

Hey guys,I'm using the MetaHopper Enable/Disable component inside a Cluster and I realized that it only updates when I change a parameter (check the "Components Inside Cluster" part of the example…Continue

Tags: metahopper

Started by jeffchicarelli Jul 4, 2018.

Comment Wall


You need to be a member of MetaHopper to add comments!

Comment by Andrew Heumann on February 19, 2017 at 12:42pm
Hi Doaa - that seems strange. What sort of platform setup do you use? Anything unusual like parallels on a mac or something? What version of rhino / gh?
Comment by Doaa on February 19, 2017 at 11:33am
Hey Andrew,
Save snippets crashes Rhino even after reinstalling it.
Any ideas?
Thank you
Comment by Vongsawat Wongkijjalerd on February 7, 2017 at 3:25am

I'm finding the Set Obj + Data Dam component invaluable :) I'm wondering if its possible to start/stop as well as clear the recorder remotely with Set Obj or something similar?

Comment by AJ on February 2, 2017 at 2:15am

HI Andrew, while learning the HUI, you have directed me for using the Metahopper plugin. following your video, can i find the exercise files in order to practice? that would be sweet.


Comment by Frans Magnusson on January 30, 2017 at 1:27pm

I feel your pain Jens. Have started to write name nick and description in a textpad document that keep around for a couple of days - there is never such a thing as a final version :)

Comment by Andrew Heumann on January 30, 2017 at 12:29pm

Hi Jens - unfortuantely because this uses the same mechanism as UserObjects in Grasshopper, I cannot modify it - it is subject to the same limitations as they are. 

Comment by Jens Buch Johansen on January 30, 2017 at 7:43am

Hi Andrew

Really a fantastic plug-in you have made here - but I have one small request. Is it possible that you could make a way to edit snippets once they have been saved? It's annoying to spend the time writing the description and finding the right icon only to notice that you forgot a small detail and have to start over :)

Comment by Frans Magnusson on December 14, 2016 at 2:29am

Well, I trying out ways to document the development of definitions in a diary of sorts by using text panels. It works really well to place them in a context on the canvas, but I would also like to gather them in a chronological order. Right now I have built a kluge that uses record-components - but it would save so much hassle with timing of events to add some kind of time stamp to each grasshopper object. Do you know if they have IDs you can key with a time value?

Comment by Andrew Heumann on December 13, 2016 at 1:35pm

Hi Frans - as far as I know the time a component/object is created is not stored by grasshopper. What exactly do you have in mind to accomplish with this logging? maybe there's a way to hack it in as a special "mode" that listens while things are added? 

Comment by Frans Magnusson on December 13, 2016 at 11:47am

Thank you Andrew, for taking grasshopper to the meta-level! Does gh store the time of creation for objects and parameters? In that case that would be super useful to access with your tools - trying to build a log functionality. 



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