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: 2806
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.

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

MeshMachine

Hi, I was using MeshMachine to perform some meshing on a surface. I have some discrete points that I want to include in the mesh vertices. I had connected the FixV with those points but the resultant mesh is still ignore it. Am I missing anything?Continue

Started by Thomas Luk yesterday.

Tensegrity structures 27 Replies

In response to a recent comment on this video:  I'm posting the files here. The same grasshopper definition should work with any collection of struts and cables you draw in Rhino. This sort of thing does seem well suited to exploration in…Continue

Started by Daniel Piker. Last reply by Kristen Lu on Tuesday.

Zombie Kangaroo Solver Error with Floor Component 5 Replies

Hello everyone,I have been running across an error when using the floor component with ZombieSolver in Kangaroo2. Essentially, the ZombieSolver does not seem to be recognizing the floor as a Kangaroo goal. I am running a tensegrity simulation where…Continue

Started by Sachin Gupta. Last reply by Sachin Gupta Nov 4.

K2Engineering: Goals cannot be converted

Hey!I am trying to use the K2 Engineering package. I already have problems with the example files – there is always an error showing up (see screenshot in german), which says the object of the typ „supportgoal“ can’t be converted to…Continue

Started by Marie Pa Oct 31.

Plywood Strips Bending Simulation

Hi,I have set up the ply strip bending analysis in Kangaroo to match roughly what I can observe in the physical material but I was wondering whether anyone has done it before and could help find the most optimal starting point in terms of the…Continue

Tags: bending, plywood, simulation, kangaroo

Started by Agata Korzeniewska Oct 29.

kangaroo planarization (methodology)

Hi,I know it can seems a weird question but I would like to know where I can study the theoretical principles of Kangaroo planarization.I reckon it is about an energy applied on the faces through Non Linear Programming but I would like to…Continue

Started by Marinella Contestabile Oct 16.

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

Comment

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Comment by Canox on November 27, 2016 at 4:43pm

I am working in a nodes project for 3d printed  structures and its difficult find a smooth transition between the branch and the joint with springs force .

I am trying to improve the tangency between  the the final mesh at the anchorpoints  and each branch direcction rest lenght in springs force.

At the same time avoid the mesh to go in a convex direcction and have a smooth transition.

How we can find a definition  , where the are diffents settings from  rest lenght and stiffness to find a correct mesh  ? i tried to apply unary force in some points to the mesh in every anchorpoint without success

this is de example that i work with 

this is what i get normally , with rest lenght and stiffness settings  

this is my goal , where there are a smooth transition in every branch direccion 

thanks !!!!

Comment by Jon on November 25, 2016 at 2:22am

Hi Riccardo,

you shouldm install weavebird.

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.

 
 
 

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