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: 1887
Latest Activity: 15 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

The 2.0 download includes a first draft of the manual and a collection of example files.

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

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

Kangaroo Form Finding & Planarization 1 Reply

Hello!I have used kangaroo 0099 for form finding a semi-dome composed of voronoi patterns. The components I used were: Springs, Pressure, UForce and CurvePull. I was wondering if I can do the same with Kangaroo 2? I read the release notes but i…Continue

Tags: Kangaroo

Started by Andy L.. Last reply by William Carroll 15 hours ago.

Need help for collision between two curves 3 Replies

Hi! I am trying to collide two curves like in the image. Step three is to search for the smallest area with galapagos. Is it possible to combine kangaroo and galapagos? Thanks! Continue

Started by Harri Humppi. Last reply by Daniel Piker yesterday.

Need help "relaxing" a grid of diamonds. 2 Replies

Hi All, I have a problem with a surface I'm designing (see screenshot attached). Since the surface height changes, the height subdivisions (V coordinate) of the diamonds make the diamonds irregular.I want the diamonds to be as similar as possible in…Continue

Tags: kangaroo, grid relax, diamonds

Started by Juan Camps. Last reply by Juan Camps yesterday.

springs 7 Replies

Hello, I'm wanting to experiment with springs in kangaroo.  The manual happens to briefly discuss this, and even mentions Hook's law.So, where are the spring components?This should be more straight forward.Continue

Tags: law, hook's, springs

Started by Erik Lander. Last reply by Art Agent yesterday.

New tutorial - Developable strips - Part 2 4 Replies

following on from Part 1So now we have a mesh consisting of strips of thin rectangles…Continue

Started by Daniel Piker. Last reply by Daniel Piker on Monday.

(Magic Tile )uniform

Hello EveryoneI'm trying to run a simple simulation on several  identical  triangle, they all have to  grow or shrink depend on scale factor of one triangle and not overlapping each other.  something like paper folding but just in 2D format. could…Continue

Tags: Tile, Magic

Started by maysam on Friday.

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 Juan Camps on Monday

Hi All, I have a problem with a surface I'm designing (see screenshot attached). Since the surface height changes, the height subdivisions (V coordinate) of the diamonds make the diamonds irregular. I want the diamonds to be as similar as possible in size.

Any help/ideas would be appreciated! Thanks!!

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

 
 
 

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