randomise triangulated facade

I'm a fairly new user of Grasshopper and I've dropped myself in at the deep end with an architectural challenge! I'm trying make a barrel vault type facade formed by triangular facets. Rather than just a simple barrel I would like it to be some sort of undulating loft shape. I would then like to 'roughen' or randomise the node points in every axis in order to mask its regularity and give the impression of randomness but whilst retaining its structural sensibilities. The icing on the cake is that I would like to then extend all the members past the nodes to give the feeling of a nest and then add dimentionality to them. It sounds like a perfect grasshopper challenge but Im a bit lost as to how to start...

Any takers?

Much appreciated.

Attachments:

barrel vault.jpg, 114 KB
random lines.png, 44 KB

Replies to This Discussion

Permalink Reply by Dirk Anderson on June 8, 2009 at 5:40am

are you creating the original vault geometry within grasshopper and if so, will it be nurbs surfaces or mesh faces?

Permalink Reply by Frank Spencer on June 8, 2009 at 5:46am

I can create the base shape very simply in grasshopper so that it is native and adjustable geometry. The curves are drawn in Rhino and then lofted in GH. My difficulty is from that point onwards: populating with a repeating grid, distorting that grid and so on.....

thanks

Frank

Permalink Reply by Dirk Anderson on June 9, 2009 at 8:04am

Joshua Vermillion worked out something similar in components here

I've done a scripted version that randomizes a set of grid and mid points z height. They should really be moved by vector (via srf normal) but haven't yet been bothered to take it any further.

Attachments:

VBMidpointSrf.ghx, 52 KB

Permalink Reply by Frank Spencer on June 9, 2009 at 9:41am

Dirk,

That's brilliant! VB sripting (old school) style is a bit above my skill level at the moment for sure. I presume the script could be amended to have controls for randomising in the U,V and surface normal direction....

I will get stuck in.

thank you.

Permalink Reply by GGo on August 19, 2014 at 11:30am

Hey there,

this is incredibly useful and elegant set,

I too am new to Grasshopper and have been experimenting with it, but I was wondering if there is an intelligent way of making faceted surfaces like you have developed here but gradually transition from a smooth surface to completely faceted like you have done above, in a gradient sort of transition?

does that make sense?

Permalink Reply by GGo on August 26, 2014 at 6:09pm

this is what I meant by gradual transition from smooth to faceted I guess what im asking is how one would create a transition of surface subdivisions with your script