algorithmic modeling for Rhino



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

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

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

Members: 1640
Latest Activity: 19 hours ago

Discussion Forum

Optimizing for specified edgelengths 5 Replies

Hello everyone!Is it possible with Kangaroo to optimize a certain topology onto a surface, so it has only a few specified edgelengths?The goal would be to not have transition between the edgelengths, but approximate a few specified values as much as…Continue

Tags: length, edgelength, edge, multiple, mesh

Started by sas som. Last reply by Torben O 19 hours ago.

Error in Loading 4 Replies

Hi There,i have Rhino 4 & Rhino 5.i have downloaded Kangaroo into Rhino5 and i get 'loading error' whenever i start Grasshopper in Rhino5.However, the component seems to load just fine when i press ok.I have attached the error file. Can any1…Continue

Started by Agneesh. Last reply by Agneesh yesterday.

Kangaroo-gHowl (Processing) - Error

Hello,I’m working on an algorithm in Kangaroo, in order to see physical transformations and I have connected this with Processing via gHowl in order to send and receive data.In order to run the procedure, I run the Kangaroo simulation first to…Continue

Tags: gHowl, Processing, kangaroo

Started by Ifigenia Lambrou on Monday.

Distributed points on surface 4 Replies

I'm sure I will kick myself but..I've made a simple definition to create points on a surface.  Then using power law forces between all the points and pull to surface.Working perfectly on a sphere:…Continue

Started by Harri. Last reply by zhougang Jul 9.

PointLine force 5 Replies

I'm desperate guys.I have been trying for weeks to use correctly the function PointLine in Kangaroo, but does not work in any way. Please give me an example or a file that will show it doing something, I need this type of force so much.I've looked…Continue

Tags: Kangaroo, PointLine

Started by Francesco di Niccolo. Last reply by Robert Vier Jun 30.

increase the processing power of Kangaroo/GH

Dear Daniel, During processing some calculation with kangaroo I noticed that I have problem with my Computer In case of a retractable roof, by dynamic relaxation it works in generally fine with few elements (e.g. only fabric between 2 radial cable).…Continue

Tags: performance, power, processing, kangaroo

Started by Frank Jun 27.

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 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".  

Comment by andres obregon on January 9, 2014 at 9:09am

Hello All.

I am testing the catenary example, but it does not work, I have an error 1. Solution exception: Index was out of range. Must be non- negative...

somebody could explain me how do I fix it?

Thank  you.


Comment by Akims H on December 30, 2013 at 5:04am

Has anybody can help me?

I install kangroo in right components folider
but still don't have this component

please help me!


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