Kangaroo

Information

THIS FORUM IS NO LONGER ACTIVE. PLEASE POST ANY NEW QUESTIONS OR DISCUSSION ON:

https://discourse.mcneel.com/c/grasshopper/kangaroo

The discussions here are preserved for reference, but new questions posted here are likely to go unanswered.

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

Website: http://kangaroo3d.com
Members: 3024
Latest Activity: yesterday

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

http://spacesymmetrystructure.wordpress.com/2010/01/21/kangaroo/

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.

Kangaroo2 is now included with Rhino6, you do not need to install it separately.

You can download it for Rhino5 from here:

http://www.food4rhino.com/project/kangaroo

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

http://www.grasshopper3d.com/group/kangaroo/forum/topics/kangaroo-2

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

https://github.com/Dan-Piker/Kangaroo-examples

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

http://www.grasshopper3d.com/group/kangaroo/page/kangaroo2-additional-examples

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:

http://discourse.mcneel.com/c/scripting

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):

http://www.grasshopper3d.com/group/kangaroo/page/example-files

manual(for version 0.099):

http://docs.google.com/View?id=ddpv

getting started video:

http://vimeo.com/20308963

demo videos:

http://vimeo.com/album/199263

Some more tutorial videos from EXLAB:

http://vimeo.com/exlab/videos

Discussion Forum

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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 […]

MeshMash!

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 […]

More…

Comment Wall

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Comment by weizhiwei on November 23, 2017 at 9:37am: Hi all, I'm a really new grasshopper user, These days I have learned how to use Kangaroo2 to solve a problem.

But I have some trouble with the component "PolygonArea".

Comment by Philippe Hannequart on November 17, 2017 at 3:10am: Hi all, How can I model a shell in Kangaroo2 ? The triangular shell element from Kangaroo1 disappeared?

Comment by Jupiterator on October 29, 2017 at 5:27pm: Hi Daniel,

Is the version of Kangaroo for OSX different than Windows?

I'm looking for the SpringsFromMesh component I've seen in a tutorial, but I can't find it anywhere.

Any help would be greatly appreciated!

Comment by Martin Siegrist on September 1, 2017 at 6:53am: Hi Daniel, I spent the last ten hours trying to remember how to use the SolidPointCollide component. I need to hang a relaxed mesh inside another mesh. Too much to explain. Well, I figured it out at some point.... now it works pretty well.

Just wanted to say thank you for programming such an awesome set of tools!

Comment by Earth on July 22, 2017 at 4:32pm: Hi all, where does Kangaroo define literally the mass of springs? The thing is, when using Kangaroo, there is no mass input, and if I applied force=0 then displaced the support, why the structure vibrates when there is no mass defined anywhere?

The second thing is that, when I applied very high value of stiffness, with proper support conditions, the elements fly off to there screen (displacement=infinity=null), even if there is no force applied, anyone know why?

help :)

Comment by Grazia Pota on May 7, 2017 at 4:29am: Hi everyone, I've a simple question. Is there an equival component for PowerLaw in Kangaroo 2?

Comment by Will Pearson on February 6, 2017 at 8:49am: Hi AJ, can you describe in what way the grab component is not working? The more detail you can provide, the more help you'll get! What version of Kangaroo are you using? What error messages (if any) are you getting when trying to use the grab component?

Comment by AJ on February 6, 2017 at 7:59am: im trying to use the grab component without big success https://vimeo.com/118721449 . following the video (and also another example file > http://www.grasshopper3d.com/video/kangaroo2-planar-quad-mesh-editing ... not working as well)

help :)

Comment by ALI ESLAMI on January 3, 2017 at 4:57am: kangaroo(rain water flow simulations)

http://www.grasshopper3d.com/photo/muscat-touristy-restaurants-by-p...

Comment by Ramon van der Heijden on December 20, 2016 at 7:43am: Hi Paul Arsene,

That post about organizing the canvas was by me. I have progressed this work quite far, but have not used kangaroo for this so far.
If you're interested, I can send you a prototype of the tool. It is functional, but may need some improvement.