Grasshopper

generative modeling for Rhino

Hi all,

ok i don't know if my brain has gone into complete lockdown state or whats wrong with my, but i haven't got the faintest idea of how to create a geodesic dome in rhino and bring it into grasshopper or create it from scratch in grasshopper.

I need a sphere with points divided equally over its surface. Until now i've used a parametrization of the sphere but it just dawned on me that the points aren't equally distributed on the surface..

I'm leaning towards creating it in 3dsmax and exporting the vertices of it, and importing them in Grasshopper, but then i have no way of adjusting the number of points on the surface.

What to do? :)

Kind regards

Thomas

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Hi Arthur,

Would you mind sharing this definition ?

Thanks a lot
Hi Punkhead,

If it's of interest to you (or others), I can integrate my plug-in command into a single c# grasshopper component if you're happy to install my plug-in. Will give you options for all sors of Geodesic domes as shown in this you-tube clip: http://www.youtube.com/watch?v=bfrljz-l8b0

I'll add it later today and post when the update is uploaded.

Cheers,

Jon
Hi Punkhead,

Reading back through the thread, it looks like you were after a geodesic grid on a freeform structure, rather than a geodesic dome. Anyway, I added the geodesic dome function Grasshopper-StructDrawRhino as an example file to my blog, http://geometrygym.blogspot.com What you're after can be done using my plug-ins, there's an example of doing so for the British Museum Great Court Roof, but I haven't added that to a Grasshopper component (yet). The iterations means it's a bit slow to computer for realtime interaction, but it can be done if you think it's necessary.

Cheers,

Jon

Hi Jon,
Would it be possible with your tool to do triangular divisions?
we had problems opening the file, do we need a license?
thanks
Hi Arthur,

If you toggle off the bucky ball Boolean input, it will produce Triangular divisions (by the way, Daniel Piker was explaining to me that for high frequencies the output is not true technical bucky balls).
The Geodesic dome and profile sweeping are both behind the plug-in license, email me about that.

Cheers,

Jon
Thanks Jon,

I am not sure what are the steps in order to draw a geodesic dome using your tool.

Do I have to buy a license to install the plugin and then use the geodesic dome tool or can i install a free reduced version which has the geodesic tool already in it ?

Is the geodesic triangular division going to output a list of 3 vertices and/or 3 edges which i can use to place a panel for example?

Thanks again Jon!
I'll email you about the license options. There isn't a free reduced version of the plug-in as such, although I have had requests for specific subsets of various tools. But I think the price of the plug-in is reasonable enough that if it saves you a couple of hours work, it should have more than paid for itself (and you might spend more than that trying to search for a free alternative if it exists, or writing the equivalent yourself). The geodesic dome component can output planar panel faces as a polygon, or you can use the other cell filleting commands if you wish to offset the edge a distance, fillet the corners with a radius or generate an extruded panel. If you've other ideas/suggestions, I'm happy to try and add them.
I was a bit late to include two example images, here they are

Hi sorry Jon...i'm a little bit late (almost one year :) ) but i download your geodesyc gym it could be very usefull for me..but i still can't use it..it's for the licence isn't it? what can i do?

Hi Giuliana,

 

The tools are free for students for academic use, or I offer an evaluation period to commercial users to evaluate them.

 

Installation instructions are here: http://www.grasshopper3d.com/group/geometrygym/forum/topics/install...  

Look forward to hearing from you.

 

Hi Jon and anyone who can help..!

I have a script on GeodesicSphere, and the script allows me to change the
diameter of the sphere but I need to make adjustment to 2 other factors:-

i) to change the number of pentagons + hexagons
ii) to change the size of the pentagons + hexagons

Do you have the script above as you've shown here that allows for (i) & (ii) within the script ? NEED HELP!
http://www.youtube.com/watch?v=bfrljz-l8b0 demonstrates the options available in the routine for creating geodesic domes (albeit in Rhino, you can do the same in Grasshopper). You can see the inputs above for the frequency (size ratio for panels to sphere diameter) and there are ICOSAHEDRON, OCTAHEDRON and TETRAHEDRON based geodesic domes, as well as options to generate bucky balls or not.

The plug-in is free for students, and a free month to evaluate for commercial firms. You can download from http://www.geometrygym.com/downloads, when installed run sdrZZLicenseRequest and follow the prompts.

Cheers,

Jon

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