algorithmic modeling for Rhino

Andrew Heumann
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Andrew Heumann's Discussions

Which Scripting Language should I learn? C#, VB.Net, or Python?
4 Replies

Started this discussion. Last reply by konrad k sobon Mar 30.

Issues with unusual Color Spaces
1 Reply

Started this discussion. Last reply by Fred Becquelin Jan 28.

Ins and Outs of Undo
10 Replies

Started this discussion. Last reply by Daniel González Abalde Jan 26.

Heumann Design/Tech

Facades+ Workshop July 25

It’s been a long time since I posted here, but wanted to come back on to promote my upcoming Grasshopper workshop at the Facades+ Conference in Chicago on July 25! It will be a really exciting opportunity to push the boundaries of Grasshopper as a collaborative tool – we’ll be exploring strategies to build multi-user grasshopper […]

2012 in review

Since I haven’t been posting much lately I thought it would be fun to give a little recap of this last year of my life in terms of art, architecture, design, and technology. January to May – Thesis For the spring semester, I was hard at work on my thesis project at Cornell. Entitled “Case […]

Tweet2Form: The Formalist Tweetbot!

I just finished putting together a beta version of a little project. It’s a tweetbot powered by a grasshopper definition. The bot transforms a cube according to a series of operations you specify, and then tweets a picture of the resulting form. There are currently 11 formal operations that the bot understands: split bridge stretch […]

Andrew Heumann's Page

Latest Activity

Andrew Heumann replied to Max Rind's discussion select curve by vectors
"I think something even simpler is possible! Whenever you want to compare vectors, Dot Product is your friend - with unitized inputs it will return a 0 for perpendicular vectors, a 1 for parallel vectors, -1 for anti-parallel vectors, and values…"
22 hours ago
Andrew Heumann replied to Erik Pelicaen's discussion Rectangular Tangential Tessellation
"are you sure what you're asking is possible? you will either have gaps, overlaps, or non-identical panels. You can't make any old freeform shape out of a bunch of identical units. and a best-fit packing of identical rectangles over a…"
Andrew Heumann replied to Richard Schaffranek's discussion Data Saver automatisation
"also, be careful with too much persistent data. it makes GH file sizes large which actually can be a HUGE pain because it slows down autosave, which happens every time you connect a wire or place a component. When it takes 2 seconds to…"
Andrew Heumann replied to riccardo foschi's discussion Variable input sliders
Andrew Heumann replied to Petrik Kollár's discussion Python If/Else
"Python's also not necessary for this - I typically use "find similar" in cases like this, or even just use the index output from the value listener directly. Also, I'd recommend attaching the value listener directly to the…"
jayant khanuja commented on Andrew Heumann's group Human
"Hi Andrew. Thanks for the reply. I am using v-ray render. I understand now why it isn't happening. I will try to find a way around it. Thanks."
Jul 22
Andrew Heumann commented on Andrew Heumann's group Human
"Hi Jayant. What render plug-in are you using? V-ray ignores the intensity of rhino lights in favor of its own intensity value, which my components do not currently control. You should however see a difference in the Rhino Rendered…"
Jul 22
jayant khanuja commented on Andrew Heumann's group Human
"Hi Andrew. Great plugin. I am working on an animation and using create light component, but once it gets baked the intensity of baked light in rhino does not change. Any suggestion will be really helpful. Thanks"
Jul 22
Andrew Heumann replied to Guido R's discussion explode tree feature request
"In some cases like these, Metahopper Wrap/Unwrap can help.  "
Jul 22
Stefano Corciolani commented on Andrew Heumann's group Human
"Thanks Andrew! I was following a completely wrong path. I will practice more just to understand, but your components work like a charm! Cheers!"
Jul 22
Andrew Heumann commented on Andrew Heumann's group Human
"Hi Stefano -  Grasshopper curves do not have an intrinsic "line width" property. When I draw lines with my custom preview component, I am overriding the DrawViewportWires method and calling args.Display.DrawCurve with the optional…"
Jul 22
Stefano Corciolani commented on Andrew Heumann's group Human
"Hi Andrew! First of all thanks for your work, it is exactly what I needed! Great job! My problem was to change line display thickness in rhino viewport. I enabled "PrintDisplay" and I wrote a tiny VB script component referencing the…"
Jul 22
Andrew Heumann commented on Andrew Heumann's group Doodlebug
"nardo - what version of illustrator are you using? it is possible that the COM IDs are specific to english-language installed version of the app, I am not sure."
Jul 20
Andrew Heumann replied to ShynnSup's discussion Installing Gradients?
"Metahopper can be used to instantiate true GH Gradient objects from a list of colors. You can use an image sampler to get those colors and then format them for metahopper's "Set Object Value" component. Right now it won't handle…"
Jul 20
nardo chai commented on Andrew Heumann's group Doodlebug
"Cant open illustrator. :-( error Below: 1. Solution exception:Retrieving the COM class factory for component with CLSID {30A9EFA1-9976-4BA2-BA68-E3798157E8EB} failed due to the following error: 80040154 没有注册类 (Exception from HRESULT: 0x80040154…"
Jul 18
Andrew Heumann replied to Kenneth cheung's discussion Develop gha plugin using python or GHpython
"you cannot create a GHA with python. Rhino 6 WIP includes a version of grasshopper with this functionality (although I think it creates a "GHP" rather than a GHA if memory serves).  As for referencing dlls - I believe you can use…"
Jul 17

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Andrew Heumann's Blog

Human UI Webinars - Beginner and Intermediate

I'm excited to announce I'll be teaching two upcoming Performance.Network webinars on my plug-in, Human UI for Grasshopper. Learn to create professional user interfaces for your Grasshopper scripts!

Sign up today - space is…


Posted on June 28, 2016 at 9:25am

Auto-Document GH Libraries

I wrote a little script for myself that I thought might be useful to other GH developers or teachers. Feed it a component from any library (such as a plug-in you're developing), and it will list and describe all the components in that library. It can also generate a markdown-formatted text file,…


Posted on January 10, 2016 at 11:34am — 6 Comments

Create Snippets with Grasshopper

Grasshopper by default allows you to save individual components and clusters as "user objects," which can be re-used over and over again. However, sometimes you want to save a group of components without clustering them - like a component with pre-defined value lists or sliders attached, or special configurations with plugins like kangaroo, honeybee, or anemone.

The attached script lets you do just that - create a user object that can automatically place multiple components at…


Posted on October 15, 2015 at 7:48pm — 11 Comments

Wire Display Toggle Switch

There is an ongoing debate in my office between those who like to organize their definitions with hidden wires for the sake of cleanliness, and those who hate them because it makes definitions hard to debug. In order to sidestep any drama, I made a little script that lets you switch all the wires in a document between "Hidden" and "Faint." It will leave all wires set to default alone. 

Download it here: …


Posted on December 24, 2014 at 12:00pm — 17 Comments

Join NBBJ's Design Computation team!

Are you passionate about design computation? Are you a Grasshopper guru or deft with Dynamo? NBBJ’s Digital Practice group is seeking to expand our Design Computation team across the firm. We have offices in Boston, Columbus, London, Los Angeles, New York, San Francisco, Seattle and Shanghai, and are always seeking out the best and brightest talent.

The ideal person we are looking for:

…is an expert in the use of Grasshopper and/or Dynamo

…is comfortable in a…


Posted on August 18, 2014 at 7:40pm — 1 Comment

Comment Wall (11 comments)

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At 7:48pm on February 29, 2016, xiejeff said…

HI Andrew,

could you add crv1 pt1 srf1 to the control panel?Question.rarThe work flow is:rhino -->control panel --> grasshopper

At 11:31am on November 9, 2015, Ding said…

Hi Andrew,

I am trying to use "Render Text to Screen" to visualize texts in the Rhino viewports other than "Perspective, Top and Back", but it doesn't work. (it only works in "Perspective, Top and Back" viewports on my laptop.)

Could you please let me know what could be the problems? Thank you very much in advance!

At 9:13am on December 30, 2014, rhinograsshopper2014 said…

Saludos de ecuador porfavor brindame ayuda deseo desarrollar window 500lux ayudame con informacion explicacion desarrollo cualquier ayuda es bienvenida gracias


Greetings from Ecuador brindame please help develop desire window 500lux help me with information explanation developing any help is welcome thanks

At 11:55am on April 24, 2013, djordje said…

Hi Andrew,
I see you are quite fluent in RhinoCommon.
Was RhinoCommon SDK your only source for learning it?
Thank you.

At 2:46pm on November 18, 2012, Dhruv Seth said…
At 3:07pm on September 26, 2012, Théo Mesnier said…

hi Andrew, I actually have a big problem trying to import rhino text objects to grasshopper to create a points cloud; fortunatly I found the solution in one of  your old posts...

but it doesn't work for me... certainly because of the new version of GH (0.9)... I'm using Rhino 4. I really need your help on it, I didn't find other solution anywhere else and don't know anything in scripts...  Thank you so much !

At 6:52pm on June 11, 2012, Mateusz Zwierzycki said…

nice works ! publish some more here

At 3:27am on October 26, 2011, Huzefa Ali said…
At 2:18am on October 22, 2011, Huzefa Ali said…

hi Andrew,

i need help editting the qvoronoi defination by demitrie. When ever i give my points rather than the random points, the qvoronoi turns red and the defination fails to work. Also that i need to give the bounding box to be my site. how is that possible? Its my thesis year and im running out of time. I am new to grasshopper and seek guidance. Thankyou.

At 11:44am on February 26, 2011, Ángel Linares said…

Cool!, thanks for sharing concepts :D I'll try that :) 





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