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: 2735
Latest Activity: 23 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

Tensegrity structures 25 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 sandra 23 hours ago.

Anchor Component different

Hi, I installed Kangaroo 2.42 (Current version) which is the latest version.The "Anchor" component in my computer doesn't work, but the "Anchor" component from my friend works.I don't know the difference between my anchor and my friend's anchor.I…Continue

Started by Hiroo Maruyama yesterday.

Flattened, optimised patterns

Hi, firstly and once again, thank you for this awesome toolset, really really amazing.I am wondering if there is any way to use kangaroo as a flattened part optimiser for non develop able surface meshes?So for example, a complex organic curved…Continue

Started by Andrew Wood on Thursday.

Goal source code examples 16 Replies

Over the last year it has been great to see an increasing number of people start to script their own custom goals for Kangaroo2.To help with this I have just open sourced most of the code for the actual goals that are included as components in the…Continue

Tags: Kangaroo

Started by Daniel Piker. Last reply by Ludovic Regnault on Wednesday.

simulating erosion w mesh collide 1 Reply

Hi! I'm trying to approximate erosion by dropping particles on a spring mesh surface with very plastic springs. The particles should deform the mesh as they slide down the surface. Is there a way to deform a mesh in this manner? Do I need to use…Continue

Started by Oliver Bucklin. Last reply by Ralph Spencer Steenblik on Wednesday.

Inflating both sides of a vertical surface 2 Replies

Hello,I was trying to create a cushion out of a curved, flat, vertical surface without much success. I combed through many discussions surrounding Kangaroo and was able to salvage some components from different definitions. However, the end result…Continue

Tags: points, from, surface, inflation, Kangaroo

Started by Hien Nguyen. Last reply by shehzad irani Apr 12.

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

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

Comment by Ebrahim Aly on May 20, 2015 at 7:19am

Hello Daniel,

I'm new at Kangaroo and I've a problem whenever i try to run one of the example files downloaded with kangaroo I get the error shown in the attached screenshot, can you help me with this please?

Comment by Agneesh on May 19, 2015 at 3:33pm

Hello Daniel,

I have used your origami cluster for a simple origami. However, my mesh keeps on rotating once Kangaroo Physics is active, unlike your example. Is there as solution please?

Regards,

AB

Comment by David du Bellier on April 29, 2015 at 12:44am

That are amazing news! Thank you for your work Daniel, kangaroo already allowed us to create immaculate tensile structures...

Comment by Daniel Piker on April 28, 2015 at 11:21am

@Juan - You can use the Length component, with the target length set to zero for the equivalent of the old springs component for tensile form-finding. The next release will also contain a membrane element.

Comment by Juan Alvarez on April 27, 2015 at 5:51pm
Hi Daniel was wondering using the new Kangaroo what would be the equivalent to the Springs module in the old kangaroo for tensile form finding?
Comment by Daniel Piker on April 22, 2015 at 7:13am
Jesper- try updating to the latest .net framework (4.5.1) from the Microsoft site: http://www.microsoft.com/net
Comment by Jesper Hildebrandt Andersen on April 22, 2015 at 5:50am

I get this error from the solver, guess it something net frame something any idea on how to solve it ?

Solution exception:Method not found: 'Int32 System.Environment.get_CurrentManagedThreadId()'.

Comment by Andrei Raducanu on April 18, 2015 at 5:59pm

Can Galapagos wait for the final result of kangaroo after making a slider change?

Comment by nick Traverse on March 8, 2015 at 5:00pm

Hi Everyone,

I'm working on/ studying reciprocal structures. I'm trying to develop this script to fabricate reciprocal stick models using no connection method, just the sticks/pipes resting on each other.

The problem is when I run the Kangaroo engine, there are some issues with the layering of the pipes. As you can see in the image, the green pipe is supported, however the red pipe isn't. This would be okay if I was planning to implement some sort of connection, but because I am working on creating a structure where they just rest on each other, this is no good. 

Any help or insight on this would be great,

thanks!!!

File>>> dynamic%20reciprocal%20cleanup.gh

Comment by M.Elsayed on March 2, 2015 at 4:22pm

Boxes collide in limited space.

I need to make a collision between five boxes in  limited boundaries  with allowance of changing in size and dimensions for each box by 80 percent. Any Ideas or even sample file close to this issue.

 
 
 

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