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: 2666
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

Error: "Solution exception:Object reference not set to an instance of an object" after Reopening a Definition 7 Replies

Hey, all.I keep running into one particular issue: when I reopen a (previously) functioning definition I receive the following error for the Kangaroo Physics capsule: "Solution exception:Object reference not set to an instance of an object." Any…Continue

Tags: Exception, Solution, Error, Kangaroo

Started by Stephen Maher. Last reply by Daniel on Sunday.

Pivot in the middle of a line? 7 Replies

hey, I am trying do simulate pantograph structure in kangaroo 2 (attach)and I cant define a pivot point. …Continue

Started by yaniv ht. Last reply by Daniel Piker Jan 10.

unrecognized objects 4 Replies

Hello guys,I am trying to start using Kangaroo, but I am having troubles with getting…Continue

Started by Baha Odaibat. Last reply by argeo Jan 10.

New origami example 55 Replies

Origami_simplified.ghThis example shows the use of the new user object…Continue

Started by Daniel Piker. Last reply by Louis Jan 9.

Kangaroo 2 Custom Goal output 2 Replies

Hi All,I'm writing a custom Goal that acts on a collection of vertices. For each of those vertices there is a numeric value I want the solver to output during debugging.If I have added an 'Output' method to my custom GoalObject. It collects the…Continue

Started by Jack Bakker. Last reply by Jack Bakker Jan 9.

Kangaroo 1 - Wood and Twine Physics Simulation - Physics Objects

I have produced the following model as a physics simulation of a real physical model (image attached), and I am trying to make it more accurate. The real model consists of a length of twine fixed at two points. 5 lengths of twine attach 5 pieces of…Continue

Tags: Simulation, Physics, Kangaroo

Started by alexander couth Jan 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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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.

Comment by andres obregon on November 4, 2014 at 3:07pm

Question about Kangaroo. It is possible to simulate a balloon filled with water in air, on a horizontal plane , self-weight forces? Thanks ...

Comment by Michael Makris on October 30, 2014 at 2:29pm

Quick question about the "new" Zombie component. How is Zombie Kangaroo different from just using a Sequence component to control Kangaroo Reset?

 
 
 

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