Grasshopper

algorithmic modeling for Rhino

Information

Kangaroo

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)

Website: http://kangaroo3d.com
Members: 2751
Latest Activity: 14 hours ago

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.

You can download it 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

Relative Coordinates for Steering a Swimming Creature

We have simulated the motion of a multicelled swimmer, siphonophore, using kangaroo 0.99 that is driven by an MD Slider, so its cells get force vectors that propel the whole body.  Currently it will move in absolute xy coordinates: North, East,…Continue

Started by Jose Cuellar May 15.

Packing circles on surfaces 7 Replies

In response to an off-list question, here is another version of the point distribution example, with an addition to display circles oriented to the surface…Continue

Started by Daniel Piker. Last reply by Alexander Hillary May 14.

Beam component - cannot change section inertia

Hi Daniel,I am experimenting with the beam component you implemented, on Kangaroo 2.4.2. In particular, I am trying to change the value of the section inertia on the example you gave out. However, modifying Ix, Iy, or GJ does not affect the…Continue

Tags: Beam

Started by Xavier Tellier May 9.

K2 planarize any polygon 7 Replies

Hi Daniel,the new K2 planarize constraint is hard coded to take only (quad) meshes as an input. I am trying to planarize polygons similar to the K0.9 component that took a list of vertices instead.I had a look at the code on Github and it looks like…Continue

Started by Mathias Gmachl. Last reply by Daniel Piker May 7.

Mesh relaxation with collisions 3 Replies

Hi,Sorry to ask, but is there a way to have a mesh relaxation that also forms over other objects that could be considered as collision objects.So, the mesh relaxes, but tightens over some other object like a sphere for example?Many thanks in advance…Continue

Started by Andrew Wood. Last reply by Daniel Piker May 4.

Optimizing eccentricities in a Reciprocal Frame assembly

Hi!Currently I'm working on the optimization of eccentricities (lengths) between bars in a Reciprocal Frame assembly. I want to equalize and control these lengths with Kangaroo and I'm trying to accomplish this goal with Kangaroos LineLine…Continue

Tags: Reciprocal

Started by Tom Godthelp May 4.

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 […]

Comment Wall

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You need to be a member of Kangaroo to add comments!

Comment by riccardo foschi on November 24, 2016 at 12:30pm

I have tried to download some definitions in the example page you linked, but when I open them I always miss some nodes because I have a newer version of GH and Kangaroo and the definition won't work (I have both kangaroo physics and kangaroo 2 but it won't work anyway).
For example when I open this one I will see this algorithm, what's missing??
Can anyone with an older version of GH can link me a screenshot of the correct algorithm?

Origami_example.gh

Comment by Will Pearson on November 2, 2016 at 5:47am

Manuel, look for the "Show" component.

Comment by Manuel on October 26, 2016 at 12:56pm

in kangaroo 2 anyone know how to recreate "geometry in" and "geometry out" from older kangaroo solver?. Its possible?

example: when remove duplicates lines/points its use for goals, but then you need to reconstruct original geometry.

Comment by Moonbeast on October 20, 2016 at 8:00pm

Does anyone have any ideas for how to create a vortex force in Kangaroo2 similar to the component in K1?

Comment by Arturo De La Fuente on October 7, 2016 at 7:24am
Comment by Noah Orr on October 5, 2016 at 7:44pm

Hi everyone,

I am currently working with Kangaroo simulating fabric relaxation through surface springs derived from mesh edges.

I am wanting to add additional springs to the surface through drawing curves onto the surface. These springs will have different rest lengths etc. to the mesh edge springs, therefore causing the fabric to relax non-uniformly. (similar to edge cables, but they run through the fabric rather than around the perimeter)

I am having a lot of trouble adding these springs and my deadline has really crept up.

Fabric%20Relaxation.gh

Below is an attempt to illustrate... Blue lines= Springs to add to mesh (Red).

I have attached the GH file if you can, please please help.

Thanks

Comment by Amir on October 2, 2016 at 3:52am

Hi friends
How can I learn kangaroo?
Do you know any tutorial?
I look for a lot but I cant find any thing.

Comment by Jorge on July 11, 2016 at 8:00pm

Dear all

How to building model like the videos?

https://vimeo.com/80136908

I try again and again but still without success.

I don't know how to lock here

My file Kangaroo%20Bend.gh

thanks.

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. http://theverymany.com/propos-specus/12-tree-house/

Comment by ALI ESLAMI on March 3, 2016 at 3:32pm
 
 
 

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