algorithmic modeling for Rhino



Kangaroo is a Live Physics engine for interactive simulation, optimization and form-finding directly within Grasshopper.

Read about the new release here

The Discussion Forum below is the best place to ask any questions about using Kangaroo.

(Please avoid posting questions on the Comment Wall, as it does not allow organization of replies)

Members: 1944
Latest Activity: 10 hours ago

You can read an introduction to the ideas behind Kangaroo here:

Kangaroo2 is now available for testing (see full announcement here). Please bear in mind this is still a work-in-progress, and features are still subject to change.

You can download it from here:

The 2.0 download includes a first draft of the manual and a collection of example files.

This thread contains some troubleshooting tips if you have problems getting it installed and working:

Some further example files for version 2.0 can be found here:

with more to follow - if there is some particular feature you would like more examples of information on please ask there.

The Kangaroo2 solver library is now separate from the Grasshopper components, and can also be referenced and used in scripts, either in the GH VB/C#/Python components, or in RhinoScript/PythonScript in Rhino. Questions about these can also be posted on:

Kangaroo2 is a complete rewrite, and the main solver/goal/force components are not cross-compatible with the previous version. However, you can keep both versions installed together allowing older definitions to be opened, and for now this is recommended, as there are also several utility and mesh processing functions relevant to both versions.

While v2 introduces many new features and improvements, not all the features from the old version currently have equivalents in the new version, but the plan is to add them all over time.

The links below are for the old version. More documentation and videos for the new version to appear soon.

example files(for version 0.099):

manual(for version 0.099):

getting started video:

demo videos:

Some more tutorial videos from EXLAB:

Discussion Forum

Kangaroo 2 scripting 3 Replies

Hi Daniel and hi all,Short question, debugging issues. I'm modifying a c# custom goal scripting example. I've been writing some lines but I'm completely blind.Inside the custom goal, inside public override void…Continue

Tags: debugging, kangaroo2, scripting

Started by enrique soriano. Last reply by enrique soriano 10 hours ago.

Mesh relaxation in Kangaroo 2 1 Reply

Hi everyone,I'm a bit confused with the new Kangaroo, and must still get used to the new "goal" logic I guess.I wanted to do a simple Mesh relaxation as I used to do similarly to this turorial :…Continue

Started by Paul Arsene. Last reply by Will Pearson yesterday.

Runtime Error in Grab

Hi,we have grasshopper and kangaroo2 installed in admin modeOn several machines I can reproduce an error in GrabIt shows:This component run onceOne runtime errormodule not foundHow can I fix this?Continue

Started by khing-admin on Friday.

Uniform tiling of a circle 6 Replies

Been googling on this for a bit to find that most packing problems are concerned with getting as many circles as possible into given shapes.I'd like to do the reverse and pack triangles (polygons) into a circle. I need:- the edges to be the same…Continue

Started by Duncan W. Last reply by taz on Thursday.

kangaroo2+galapagos 5 Replies

Hi allHow is the setup for using kangaroo2 with galapagos (or similar solvers)?until now, I was using the K1 zombie version, which was convenient. Although K2 converges much faster and finish the computation, I would like to reset the solver…Continue

Started by enrique soriano. Last reply by Thomas Perkov on Thursday.

Kangaroo 2 45 Replies

Hello Daniel i have downloaded and installed Kangaroo 2 but i cant interact with the rhino viewport, i have installed rhino 5 64 sr11, both files are unlocked, do you have any idea why this happens?Continue

Started by dvdrbls. Last reply by Julien PARIS on Thursday.

News and Updates

Force polygons of equilibrium structures

I have recently been exploring some reciprocal force diagrams using Kangaroo. From the 1869 paper by James Clerk Maxwell On reciprocal figures, frames and diagrams of forces : …to construct the Polygon of Forces, by drawing in succession lines parallel and proportional to the different forces, each line beginning at the extremity of the last. If the forces acting at the […]

Minimal surface puzzle

The top row shows three different minimal surfaces from the same boundary curves. The bottom row shows the same 3 surfaces rotated and in a different order. Which number corresponds to which letter?

Orthogonal Clustering

I’ve always aimed to make Kangaroo a specifically architectural physics engine. While it shares many characteristics with similar engines used for other purposes, such as games and animation, it has some features that are uniquely suited to designing buildings. Form-finding and physics-based-modelling often result in curved shapes, with an elegant and natural appearance which is something […]

Variation from Uniformity

All of these triangles are identical and equilateral: In architectural geometry over the last few decades, a common topic of research has been how to build and clad doubly curved surfaces in an efficient way. While computer aided manufacturing has made it possible to make buildings where every panel has slightly different dimensions, there are […]


      As regular readers of this blog will know, I’m passionate about the use of relaxation and force-based methods for optimizing geometry in a very interactive way. There is a great variety of form-finding that can be done by assigning physical forces as interactions between sets of particles. However, in my investigations so […]

Comment Wall


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

Comment by Charles Portelli on August 21, 2015 at 9:47am

The issue below was resolved once i turned off the custom ribbon layout i created.

Comment by Charles Portelli on August 21, 2015 at 9:05am

Hi All, I got a new computer and tried installing kangaroo but the tab does not show up in gh. I"ve tried placing the files in this directory:

C:\Program Files\Common Files\McNeel\Rhinoceros\5.0\Plug-ins\Grasshopper (b45a29b1-4343-4035-989e-044e8580d9cf)\\Components

I've also tried placing the files in this directory:


I"ve checked the security settings on the files. They are not blocked. Any ideas how I can resolve this?


Comment by wenyu on June 7, 2015 at 5:03pm
Comment by wenyu on June 7, 2015 at 5:01pm

Hi Daneil, I use your definition and add string force to it because i want to make the folding surface into a cylinder shape.But the shape doesn't look like so round , so i want to add one more string force after the surface has already been folded, but it didn't work, the error message is solution exception.

Hope someone could help me !!!

Comment by Juan Camps on May 24, 2015 at 8:19pm

Hi All, I have a problem with a surface I'm designing (see screenshot attached). Since the surface height changes, the height subdivisions (V coordinate) of the diamonds make the diamonds irregular. I want the diamonds to be as similar as possible in size.

Any help/ideas would be appreciated! Thanks!!

Comment by Ebrahim Aly on May 20, 2015 at 7:19am

Hello Daniel,

I'm new at Kangaroo and I've a problem whenever i try to run one of the example files downloaded with kangaroo I get the error shown in the attached screenshot, can you help me with this please?

Comment by Agneesh on May 19, 2015 at 3:33pm

Hello Daniel,

I have used your origami cluster for a simple origami. However, my mesh keeps on rotating once Kangaroo Physics is active, unlike your example. Is there as solution please?



Comment by David du Bellier on April 29, 2015 at 12:44am

That are amazing news! Thank you for your work Daniel, kangaroo already allowed us to create immaculate tensile structures...

Comment by Daniel Piker on April 28, 2015 at 11:21am

@Juan - You can use the Length component, with the target length set to zero for the equivalent of the old springs component for tensile form-finding. The next release will also contain a membrane element.

Comment by Juan Alvarez on April 27, 2015 at 5:51pm
Hi Daniel was wondering using the new Kangaroo what would be the equivalent to the Springs module in the old kangaroo for tensile form finding?


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