Offset Triangular Grid

hey there,

i'm just in the learning process of grasshopper, so my apologies if my questions are a bit

I am remodelling the gouangrhou opera house for one of my courses in uni.

At the moment i'm trying to build the steel structure as shown in the pictrue below.

I have managed to triangulate the whole building, but do have a lot of problems with the offset functions.
At the moment i just have triangles with no thicknes. I am trying to make them look like in the above picture, but somehow i can't make the offset work how i want it to work.

do you have any suggestions of how to proceed?

thanks a lot in advance! Simon

Replies to This Discussion

Permalink Reply by Yasser Hafizs on June 7, 2013 at 2:01pm

Hi Simon,

Some trick: find the centroid of your floor building, use it to scale the skin, then loft to the original curve. Repeat it to achieve thickness, with centroid in your triangle surfaces.

Permalink Reply by Alex Webb on June 7, 2013 at 4:25pm

it's pretty hard to see your script, but if you find the normals of your triangles you can offset relative to them. scaling to the centroid of your building would only work if your surface is a dome with the same centroid.

Permalink Reply by Manuel on June 7, 2013 at 8:56pm

if you create a mesh you can try weaverbird plugin with Frame component and thicken mesh component.

Permalink Reply by SH on June 9, 2013 at 1:03pm

Thank you! I'm trying weaverbird at the moment. I've got some problems with the thicken mesh component. It somehow extrudes in two different directions. And I can't bake...
I still have to learn a lot about grasshopper, sorry about that. :)

Thanks for your help!

Cheers, Simon

Permalink Reply by Manuel on June 16, 2013 at 12:20pm

Mmm put a mesh component (black/gray component) and see if you can bake it...
Also use the lastest weaverbird version (i remember a old cant bake / invalid mesh bug)

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