Kangaroo

3021 members

Description

THIS FORUM IS NO LONGER ACTIVE. PLEASE POST ANY NEW QUESTIONS OR DISCUSSION ON:

https://discourse.mcneel.com/c/grasshopper/kangaroo

The discussions here are preserved for reference, but new questions posted here are likely to go unanswered.

Kangaroo is a Live Physics engine for interactive simulation, optimization and form-finding directly within Grasshopper.

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pull to surface, general questions

by gabriel

Jan 21, 2011

hey...so i'm working with weaverbird and kangaroo, trying to constrain a mesh's points to a brep, and using forces to optimize/equalize their position...and eventually tweak the subdivision based on attributes of the brep/mesh; functions of curvature, deviation, etc.

 

i started just by trying to constrain the points and have them equalize, treating each mesh wire as identical springs (like daniels gif of equalizing on a stretched sphere).  but immediately i have crashes, "out of index" errors, or (best case) nothing happens.

 

i kinda feel like i'm missing something... grasshopper definition attached to show my sorry state.

 

is there anyone out there going great guns with kangaroo?  understanding every functionality and simulating your dreams?

 

i think a sort of a description of the way K passes data between its components, the classes of kangaroo objects, what data must match to what, etc would help a lot of people.  for me, it's easier to understand a new software if i understand this type of stuff - the structure of it, basically...

 

anyway, thanks!  i'm having fun experimenting... the potential is great

  • up

    Daniel Piker

    Hi Gabriel,

    Thanks for posting your questions, I'll do my best to answer them

    To help me see more clearly what you are trying to achieve could you post the rhino file referenced by this gh definition ?

    1

    Jan 23, 2011

    • up

      Daniel Piker

      There were a few things off with the settings, but the main problem here was that you need to start with something like a reasonable mesh before you start trying to equalize it. It looked like you were using just the rhino Mesh from NURBS object, which ends up with a very messy random mix of edges per vertex - so it can't be turned into a 'nice' mesh by just relaxing the edge lengths.

      You might be better off making a mesh yourself, by joining primitives, because then you start with a reasonable topology and Kangaroo can take care of making the geometry the same as your target surface.

      I am working on some tools that could change the mesh topology too, as well as relaxing their geometry, but they are not ready just yet.

      1

      Jan 23, 2011

      • up

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