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: 2591
Latest Activity: 11 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:

The main source of example files for the latest version is here:

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

Form Finding for timber gridshell 5 Replies

Hi Daniel , I was trying to reach the form of a timber gridshell obteined with K1, with K2 , as shown in the picture, but with no results, i tryed to work a bit more with the bending but it's not working as i am expecting .What could be the reason ?…Continue

Started by Davide Rando. Last reply by Daniel Piker 11 hours ago.

Bake kangaroo geometry 2 Replies

Hello,I'm new to kangaroo 2, and haven't completely grasped the behaviour of the solver yet. I can make a simple simulation, but how do i bake it? I'm recieving this message from grasshopper.Thanks!…Continue

Started by Maja Linse. Last reply by Maja Linse 12 hours ago.

Motion simulation

Hello everyone, I'm new to kangaroo, but it seems kangaroo does not simulate engine with brep ? How can I start simulating with models available like this?…Continue

Started by Hieu Le 15 hours ago.

Projectile motion

I am sorry if this was asked, I am looking for tutorials of how to do the shooting of a projectile and have it's trajectory and where it would fall on the space. It is possible to do this in Kangaroo3d? My variables would be the vertical angle of…Continue

Started by nathalia rotelli 20 hours ago.

Interface usability under heavy load 5 Replies

I'm running complex simulations that take a great deal of cpu time per iteration. It seems the entire grasshopper (and rhino) interfaces are blocking, waiting for an update from kangaroo before processing any user input. Though it would be nice to…Continue

Started by Cory. Last reply by Bathsheba Grossman yesterday.

SolidPointCollide/SphereCollide - with bounce? 2 Replies

I'm relatively new to Kangaroo, so apologies if this is a simple question:I'm currently in the middle of designing a display piece whereby hundreds of ping-pong balls are dropped through a sort of "Plinko" assembly. I want to model this reasonably…Continue

Started by Scott Sommerville. Last reply by Scott Sommerville on Friday.

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 matthewfilan on April 6, 2016 at 4:14pm

hi this is matthew and i just got into grasshopper learning for my design course and i have been experimenting with kangaroo. currently i want to make a shape such like this but i don`t know where to start can someone who knows how to do this please give me some ideas. thank you all for reading this.

Comment by ALI ESLAMI on March 3, 2016 at 3:32pm
Comment by yushide0527 on February 29, 2016 at 9:29pm

come here

Comment by Moonbeast on February 8, 2016 at 4:01am


Is there a way to measure kinetic energy of a system in Kangaroo 2 as in Kangaroo 1? Just trying to figure out if a system has reached equilibrium, keep up the great work.

Comment by Hans Rebel on December 20, 2015 at 12:07pm

Hi Daniel
I am excited by your kangaroo 2, thank you.
Trying to define goals to infate a mesh,  I came across your
I added a 4. way witch uses the crossproduct which gives me the force_vector as well.
With that I defined an InflateMesh goal, which gives me good results for regular meshes.
The idea is just moving the face_vertices by the force_vector and let the solver add the vectors at a vertex.
Could you please have a look and tell me if I correctly handle that goals.
That would be a great help for further experiments.
Thanks again!

Comment by Farzane Oghazian on November 9, 2015 at 2:28am

hi. I just started to work with kangaroo. I wondering do only I have problem with extracting this examples or there is a problem with them?


Comment by kipodi on September 29, 2015 at 7:53am

Hello, wondering if kangaroo has a solution for a conical mesh..or an idea on how to create one.

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


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