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: 222
Latest Activity: Apr 10

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.


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 Vongsawat Wongkijjalerd on August 8, 2016 at 5:20am

SelObj can't seem to handle Objects that are changing too fast.
It can still see the Param, but with 20ms timers or active slider manipulation, It can sometimes (or always) output with 0 items.. Is there a way to get around this?

Comment by huntan on August 6, 2016 at 2:53am

Thanks. I guess I had to restart rhino for it to appear.

Comment by Andrew Heumann on August 5, 2016 at 8:37am
Hi huntan - if you install MetaHopper it will show up.
Comment by huntan on August 5, 2016 at 8:03am

Hi guys, just a minor question, how do I get the MetaHopper menu bar as used in #10 in the vimeo video? 


Comment by Andrew Heumann on June 7, 2016 at 5:36pm

Hey Martin. Personally, I like C# best - but this is largely a personal preference. See my extended thoughts on the matter here:

Comment by Martin Siegrist on June 7, 2016 at 3:12pm

Andrew, to extend my possibilities in Grasshopper, which programming language should I learn first?

I've done a tiny bit of python scripting. Basically playing around with examples and adapt scripts a little bit but I'm far from being able to come up with my own code... But then apparently some stuff is inaccessible through python and I'd need to know about C#?

Any tips?

Comment by Martin Siegrist on June 1, 2016 at 8:58am

Cool man! Thanks for making my life a bit easier

Comment by Andrew Heumann on June 1, 2016 at 8:52am

yeah, you can either comment out the lines in that script that add /remove events for "Key Up" - or just use the attached which modifies a slider itself.

Comment by Martin Siegrist on June 1, 2016 at 8:35am

Yes the script works but the next problem of course is the counter... I used a state detection before, but that doesn't work now. Basically the script should make the slider go up 1 unit or down 1 unit at a time. I got your script to go up two units at a a time, my guess is that it records when I press and when I release the key?

Comment by Andrew Heumann on June 1, 2016 at 8:02am

did my script work for you at least? if you want something more streamlined we can set it to point more directly to the sliders...


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