Create a skin with tension properties around a series of ball

Replies to This Discussion

Permalink Reply by Daniel Piker on October 21, 2009 at 9:29am

Metaballs and Fabric simulations (I presume you mean something like this when you talk about tension) are two quite different approaches.
The first is based on scalar fields and implicit surfacing, and results in a mesh with a fairly messy mix of quads and triangles, while the second is based on dynamics and usually involves networks of 1D springs (plus collision detection if you want to wrap around objects).

It really depends what you are trying to achieve. What is this for?

Permalink Reply by Pascal Gobeil on October 21, 2009 at 10:10am

This is exactly what i am trying to do ( we (my office) win a competition (landart) this summer and we need now to build it (so we need precision) The sculpture is 4 meter height by 40 meter long (a series of 43 spheres with different dimension ( 3.6 meter to 1.2 meter) build in concrete and envelopped by a translucent fiberglass skin. this is a image of the competition.
thanks for your help.

Attachments:

• Copie de nuit-1 ton copie.jpg, 207 KB
• Copie de vue sud copie.jpg, 304 KB
• maquette.jpg, 235 KB

Permalink Reply by taz on October 21, 2009 at 1:31pm

Pascal,

Interesting project. How do you plan to construct the fiberglass skin?

Permalink Reply by Pascal Gobeil on October 21, 2009 at 3:36pm

a thermoplastic retractable membrane skin as support for the fiberglass application.

Permalink Reply by Luis Fraguada on October 22, 2009 at 1:15am

Pascal, word on the street is that the next version of GH will have metaballs:

Permalink Reply by Thomas Bildsøe on November 13, 2009 at 1:44am

And when do we get to try this neat feature? :)

Permalink Reply by alee_anne on November 13, 2009 at 1:26am

I am looking at trying to do a similar thing - basically a fabric simulation.
I'm looking at taking a pre-shaped flat plane and laying it over a contoured form and seeing how it 'sits'. There is also a need for it to wrap around so based on above there would be the need for collision detection.
I want no or minimal stretching - ideally degree of stretching would be similar to curve degree and could be increased decreased depending on my 'fabric'- any ideas on how/if this is currently achievable in GH would be appreciated. I have thought it may be possible just using curves that i later use to form a surface but haven't yet gotten that to work either.
From what i can see this isn't possible in Rhino either only implicit surfacing.

Permalink Reply by giac0mo on September 7, 2010 at 3:22pm

hi! it's possible to have the definiton of your wip?
i'm looking for something that in grassshopper can recreate a drape or a cloth above some boxes!
thanks in advance

Permalink Reply by madmax on March 20, 2011 at 10:02am

hello!

i was looking around and found your project. it is possible to get this definition? would be nice!

thanks

max