Mixing several skins toguether

Hi there, so been working on this definition for a while, and i have different skins or typologies (done in weaverbird) and I wanted to know if its possible to unite them, lets say instead of having the skins wraping each individual polyhedron, I wanted to know if i could force the skin to wrap several at the same time, but while following their shape... sort of like in this crappy sketch :p

So I want to find a way of wraping said skin around several at a time or maybe all of them at the same time to create a facade, tho beeing able to choose between wrapping each tessellation or wrapping lets say 10 figures at a time would be nice, just to create spaces.

But even tho i know how to create skins on each on I'm at a loss as to how to wrap entire segments like in the drawing.

Also You´ll need:

Struct draw rhino for the tessellation to work and weaver bird for the skins to appear:

Thanks and have a great day, any help would be a ppreciated, see ya.

Attachments:

gridwithskins.ghx, 2 MB

Replies to This Discussion

Permalink Reply by Giulio Piacentino on March 17, 2011 at 2:35pm

Hi Juan,

if I understand what you are doing here, it seems that you should unite (boolean union) the geometry before subdividing it. I think they are brep'es, right? In any case, after booleaning them you can then subdivide it like it were a full object. Is this helpful?

- Giulio

Permalink Reply by Juan Alberto Galicia Osorno on March 17, 2011 at 5:36pm

I mean erm.....no but those are the tessellations you are refering... right?... I mean the facades that i added at the end with weaver bird, those are the ones that i want to unite, instead of having a facade covering the entire tesselation i want to create spaces with the facade... like lets say it could surround 3 polyhedrons as a cacoon, like in the drawing

Thanks Giulio have a nice day :D

Permalink Reply by Giulio Piacentino on March 17, 2011 at 5:58pm

Oh yes, I think I see now. Then you probably need to define a way to construct the cacoon. For example, a method based on the convex hull would work (but I dont know any implementation of a 3d-convex-hull in Grasshopper), or a physical method that uses collision. For the latter, maybe you could use Kangaroo.

Catmull-Clark subdivision normally has the effect of "shrinking" the mesh, so if you want the result to perfectly touch the inner part, it would need to be somehow larger from the beginning. There are other subdivision methods that do not shrink (they interpolate), but, as before, they are also not available a.t.m. in Grasshopper.

Another method might be to subdivide the inner polyhedra as well. This would make them shrink, too. Or construct the cacoon completely geometrically, or...

- Giulio

PS: Thanks for making me look up the plant Entada scandens, it has a pretty interesting shape!

Permalink Reply by Juan Alberto Galicia Osorno on March 17, 2011 at 6:04pm

mmmm, well i can already change their size, erm no tsure what you mean by shrinking the polyhedra or how to even subdivide them ... i'm sorry i'm just so new to this :p

Lots of things to learn, and its just for one class actually, after it not a single teacher uses grasshopper so it´ll be the last time i´ll use it for school ... so i never had any previous knowledge, its like an extreme crash course that lasts about 3 months :p

Ah well but thank you, I´ll do some research about the covex hull you mention, well thanks Giulio have a nice day

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