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: 2481
Latest Activity: 22 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

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

fixed lengths for mass production 8 Replies

Hi,I got stuck with designing a temporary pavilion, which would have a simple triangular construction, however my aim is to have all the triangles made of only a certain number of given dimensions...e.g. 3 given different dimensions of profiles…Continue

Started by Jiri Tomicek. Last reply by Daniel Piker 22 hours ago.

Circle packing: Varying radii 2 Replies

Hi everyone,I'm using Kangaroo2 to do some circle packing on a plane surface. I wanted to have the circle size varying iteratively based on proximity to a certain geometry object (points, curves). Is it possible to have the radii updating while the…Continue

Started by Andre. Last reply by Andre yesterday.

Static test, how to? 4 Replies

Hello Lady's and Gent's,I'm a bit of a nooby on kangaroo, but as a project we had to design a stone bench.I would like to see if it could stand on it's own the way he's cut. Is there already a topic that explain the way to do so (I've been searching…Continue

Started by Duquenne Th. Last reply by Daniel Piker yesterday.

Newbie question re: hinge + collision 5 Replies

Hi all,I'm an advanced Rhino & GH user, but total beginner with Kangaroo.  I'm trying to setup a basic hinge that stops when the two halves crash into each other (think of a hinged bracelet).  I can make the hinge open/close (although it's…Continue

Started by Declan Halpin. Last reply by Daniel Piker yesterday.

Helix spring simulation? 3 Replies

Hi all,I am totally new to Kangaroo and any advice or pointer would be welcome!I'd like to simulate the deformation behavior of a simple helix spring. I've followed some online tutorial and learnt how to create spring behavior. I attached my test…Continue

Tags: changing, shape, Helix, Kangaroo, Spring

Started by Billynew. Last reply by Tom Sholt on Saturday.

Origami Sim Issues

Hi folks,I am trying to simulate some origami folds however am pulling an error: 'object reference not set to an instance of an object'. I have searched around but can't find a definitive solution.Any help would be greatly appreciated :)(gh file…Continue

Started by James Walker May 17.

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 yushide0527 on February 29, 2016 at 9:29pm

come here

Comment by Moonbeast on February 8, 2016 at 4:01am

Daniel,

Is there a way to measure kinetic energy of a system in Kangaroo 2 as in Kangaroo 1? Just trying to figure out if a system has reached equilibrium, keep up the great work.

Comment by Hans Rebel on December 20, 2015 at 12:07pm

Hi Daniel
I am excited by your kangaroo 2, thank you.
Trying to define goals to infate a mesh,  I came across your Vertex_areas_comparison.gh.
I added a 4. way witch uses the crossproduct which gives me the force_vector as well.
With that I defined an InflateMesh goal, which gives me good results for regular meshes.
The idea is just moving the face_vertices by the force_vector and let the solver add the vectors at a vertex.
Could you please have a look and tell me if I correctly handle that goals.
That would be a great help for further experiments.
Thanks again!

Vertex_areas_comparison_XProd3D.gh
151220_MeshInflate_VB_triags_XProd.gh

Comment by farzane o on November 9, 2015 at 2:28am

hi. I just started to work with kangaroo. I wondering do only I have problem with extracting this examples or there is a problem with them?http://www.grasshopper3d.com/group/kangaroo/page/

example-files

Comment by kipodi on September 29, 2015 at 7:53am

Hello, wondering if kangaroo has a solution for a conical mesh..or an idea on how to create one.

Comment by Charles Portelli on August 21, 2015 at 9:47am

The issue below was resolved once i turned off the custom ribbon layout i created.

Comment by Charles Portelli on August 21, 2015 at 9:05am

Hi All, I got a new computer and tried installing kangaroo but the tab does not show up in gh. I"ve tried placing the files in this directory:

C:\Program Files\Common Files\McNeel\Rhinoceros\5.0\Plug-ins\Grasshopper (b45a29b1-4343-4035-989e-044e8580d9cf)\0.9.76.0\Components

I've also tried placing the files in this directory:

C:\Users\MYNAME\AppData\Roaming\Grasshopper\Libraries

I"ve checked the security settings on the files. They are not blocked. Any ideas how I can resolve this?

Cheers,

Comment by wenyu on June 7, 2015 at 5:03pm
Comment by wenyu on June 7, 2015 at 5:01pm

origami%20simulation.3dmorigami%20simulation.gh

Hi Daneil, I use your definition and add string force to it because i want to make the folding surface into a cylinder shape.But the shape doesn't look like so round , so i want to add one more string force after the surface has already been folded, but it didn't work, the error message is solution exception.

Hope someone could help me !!!

Comment by Juan Camps on May 24, 2015 at 8:19pm

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!!

 
 
 

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