Modelling a Pavilion using Grasshopper with various thicknesses of laths and supports

Hello All,

I am a Masters student of Architecture and I just got introduced to Rhino and grasshopper. I have an assignment to model the attached pavilion (Stonesourcing space by Yousef Anastas) using mainly grasshopper. (If it were just Rhino it perhaps would have been easier for me). I've been working on it for a while now and I unfortunately am a bit stuck.

Below are some of my concerns:

1) I know the theory of what I'm suppose to do which is to have the rectangular base and scale it then array it up. However I noticed that the thickness of the each lath and support varies. There are 25 laths in all and from the structure diagram I have gathered that there are basically 4 groups of the same thickness from the base going up its the first 9, then 7, then 5 and then the top 3. I just can't seem to figure out how to vary the thickness. I would assume the attached lath and support definition diagrams would help but unfortunately I don't know how to read it. I've tried some formulas which didn't exactly work but I still included them in the file.

2) I also need to figure out how to create the hole in the structure which is the entrance. I know in Rhino I could just Boolean it out but is there a way to do it in grasshopper?

3) I also need helping figuring out the definition for putting the vertical supports in between each row. The diagram says something fancy about "Testing acceptable constraints in flexion and in shear, we find an acceptable eccentricity that varies with each row." Ok maybe it wasn't so fancy but I have no clue how to do that with grasshopper!

4) My lecturer wants a Structure Simulation which I'm going to assume is what number 3 is all about?

I've attached my progress so far and would appreciate any help possible. I'd prefer if anyone could guide me using basic things (without any fancy plug-ins unless it's absolutely necessary).

However, any help is appreciated! Thank you so much in advance.

Cheers!

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Replies to This Discussion

Permalink Reply by David Rutten on May 6, 2015 at 12:52pm

Are you sure you want to scale the sections? That results in curved edges of the pavilion. If you create a trapezoid and intersect it with appropriate spaced horizontal planes you retain the straight form:

It's difficult to use the parabolic equation in GH, because the elevation at which it is evaluated depends on the already existing layers. This requires custom looping which is not possible without plugin components or custom scripting. However you can use several sliders to define the layer thicknesses and elevations (see attached).

Attachments:

Paviljon #2.gh, 23 KB

Permalink Reply by Joanna Sadler on May 7, 2015 at 2:36am

Ooo wow! This is great, didn't think of this method at all. Newbie errors, but this makes so much more sense because I noticed the curve but I was so focused on trying to figure out the formula that I ignored it. I've been trying to figure out the various thicknesses but I suppose that can be eyeballed. Thanks so much!

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