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: 1943
Latest Activity: 13 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

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 13 hours ago.

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 yesterday.

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 yesterday.

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 yesterday.

Equivalent of PowerLaw with Kangaroo 2 ? 1 Reply

Hi everyone,I'm a beginner with Kangaroo(s) and what I'm trying to do is to regroup different and separated triangles according to their common edges or vertices. Also the triangles have to preserve their geometries, to stay flat on the floor, and…Continue

Tags: goals, connections, powerlaw, kangaroo

Started by Julien PARIS. Last reply by Julien PARIS yesterday.

Mesh relaxation in Kangaroo 2

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 on Tuesday.

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 Michel Cassagnes on July 11, 2013 at 6:39pm


I begin with Kangaroo. I am trying to model a movable roof made with mesh articulated at some edges (I used hinges). roof is moving on a plane, so I constrained some points to remain at z=0. I have turned around for hours, studied examples that I found here, but I cannot make my model run. I need some help.

Best regards,

Comment by muhammad fachrurrazi on June 27, 2013 at 5:01am

hello guys, i have problem with Plaw component. i dont know why its not working again but nothing error report. thanks for your help

Comment by Andrei Raducanu on June 5, 2013 at 9:33am

do you reckon a anti-funicular shape is still the way to go if you have an assembly system like the Boxel Pavilion, where the "bricks" aren't aligned to the surface but stay vertical (therefore the compression force isn't perpendicular to the modules' faces, but comes at an angle)? hopefully somebody with structural knowledge can enlighten me...


Comment by Andrei Raducanu on June 5, 2013 at 7:56am

hey, all!

do you guys know of a method that can be used when you want to convert a brep into a mesh with fairly uniform faces (in size and shape), which is what i guess is needed when doing anti-funcular simulations... Thanks a lot!

Comment by Dmitry on May 16, 2013 at 4:00am
Comment by Dmitry on May 16, 2013 at 3:53am

Hello Daniel !
sorry for may ask same question again  , but I cannot found solution how to fix it .
the target is to make limit border of shape for circle paking  .
I add some button  to script , which I load from your blog , for make possibly use different  diametr of circle . now it can paking , and each circle stop when reach border of surface by it's center.
but I would like to make  circle stop when reach border of surface by it's outline .
is it possible to do something in this script , for it work as I need ?

Comment by Daniel Piker on March 28, 2013 at 2:42pm
Hi Ben, this is great to see. I'm glad it was useful for you, and thanks for sharing
Comment by Ben Howes on March 25, 2013 at 1:45pm

The ACM Group at Thornton Tomasetti used Kangaroo as a platform for facade form finding on a project with 360 Architecture.  Check out our blog for a detailed description of the project, and have a look at a partial form finding run in the video below.

Comment by Robert Harvey on February 23, 2013 at 10:59am

That's it, thank you!

Comment by Daniel Piker on February 22, 2013 at 10:27am

Robert - do you definitely have both the kangaroo gha and the dll in your components directory, and both unblocked ?



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