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: 2483
Latest Activity: 7 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:

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

fixed lengths for mass production 8 Replies

Hi,I got stuck with designing a temporary pavilion, which would have a simple triangular construction, however my aim is to have all the triangles made of only a certain number of given dimensions...e.g. 3 given different dimensions of profiles…Continue

Started by Jiri Tomicek. Last reply by Daniel Piker on Wednesday.

Circle packing: Varying radii 2 Replies

Hi everyone,I'm using Kangaroo2 to do some circle packing on a plane surface. I wanted to have the circle size varying iteratively based on proximity to a certain geometry object (points, curves). Is it possible to have the radii updating while the…Continue

Started by Andre. Last reply by Andre on Tuesday.

Static test, how to? 4 Replies

Hello Lady's and Gent's,I'm a bit of a nooby on kangaroo, but as a project we had to design a stone bench.I would like to see if it could stand on it's own the way he's cut. Is there already a topic that explain the way to do so (I've been searching…Continue

Started by Duquenne Th. Last reply by Daniel Piker on Tuesday.

Newbie question re: hinge + collision 5 Replies

Hi all,I'm an advanced Rhino & GH user, but total beginner with Kangaroo.  I'm trying to setup a basic hinge that stops when the two halves crash into each other (think of a hinged bracelet).  I can make the hinge open/close (although it's…Continue

Started by Declan Halpin. Last reply by Daniel Piker on Tuesday.

Helix spring simulation? 3 Replies

Hi all,I am totally new to Kangaroo and any advice or pointer would be welcome!I'd like to simulate the deformation behavior of a simple helix spring. I've followed some online tutorial and learnt how to create spring behavior. I attached my test…Continue

Tags: changing, shape, Helix, Kangaroo, Spring

Started by Billynew. Last reply by John May 20.

Kangaroo working 3 Replies

Hi, I'm writing a paper on an algorithm involving Kangaroo, so I would like to investigate more in depth how kangaroo does works, is there some sort of documentation about the phisical rules which are used inside nodes and what does stiffnes and…Continue

Tags: documentation, kangaroo, rules, behaviour, formulas

Started by riccardo foschi. Last reply by riccardo foschi May 8.

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 andres obregon on November 4, 2014 at 3:07pm

Question about Kangaroo. It is possible to simulate a balloon filled with water in air, on a horizontal plane , self-weight forces? Thanks ...

Comment by Michael Makris on October 30, 2014 at 2:29pm

Quick question about the "new" Zombie component. How is Zombie Kangaroo different from just using a Sequence component to control Kangaroo Reset?

Comment by S.Sifakis on May 20, 2014 at 1:11pm

Hello Daniel,

I am trying to inflate 4 balloons within a box which itself also inflates. I would like to constraint the balloons inside the box but it is not working. The external surface of the inflatable object collide with the exterior surface of other objects but not the exterior with the interior. Is there something wrong with my definition or there is another way to do it?

Any help on this matter would be really appreciated since it is part of my thesis project!!

Thanks!!!! :)

Comment by Luis García Lara on April 17, 2014 at 9:05am

Hi Daniel,

i'm having an error using KingKong plug-in, this error come from the kangaroo cluster, I think it's for the change of the hinge component in the last update of kangaroo, i'm wondering if someone can share the password for update the cluster?¿ or update the cluster and share again for continue using this nice plug-in?¿


Comment by S.Sifakis on April 17, 2014 at 5:32am


I am trying to create constaint on  an inflattable mesh by using a curve as a spring. I used the mesh collide  component in order to deform the mesh following the curve as a constraint but the mesh doesn't seem to recognize it. I am working on the file that originated from this discussion.
Any help would be appreciated




Comment by Aurea Botelho on April 17, 2014 at 5:23am

I have uploaded Kangaroo and it's not working at all :/

Comment by chaz on February 12, 2014 at 11:56am

hey guys im having a severe problem. I cant find kangaroo anchor points while im using the kangaroo plugin! please help 

Comment by ALI ESLAMI on February 12, 2014 at 4:29am
Comment by andres obregon on January 9, 2014 at 2:07pm


thank you , it is working now.

Comment by Juan Carpio on January 9, 2014 at 10:14am

Hi Andrés. Just make flatten at "Force Objects".  



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