Normally geodesic domes are bisected awkwardly at the center, this is really nice! His definition, cutting edge for 2011 perhaps, is very dense, isn’t using any modern plugins, and is devoted largely toward the circle/oval endeavor.
Does anyone know how I could take a stab at this more efficiently today? I can bring in a Dodecahedron either through Polyhedra or Weaverbird but I don’t quite understand the subdivision/frequency process, I’m not accustomed to subdividing with more faceted results, assuming I am understanding how this is happening. I just ordered a book on geodesic math so if nothing else maybe I can figure it out on my own and report back.
Attached is the original definition by Gabe, and empty canvas with a Dodecahedron.
Talking about subdivision wouldn’t something like this do it? (I mean the image) Just subd a icosahedron with Weaverbird. Or do you want to implement the subdivision yourself? Or I am missing something.
In the case of the Dodecahedron I shared earlier, and the Icosahedron @DanielPiker shared, there is a perfect separation point between hemispheres. To be honest though, the geodesic Dodecahedron and Icosahedron are essentially the same. I don’t know if the original file I found was mislabeled or I’m not understanding geodesic math, most likely the latter.
Structurally, all of these are more than suitable I assume, at least in the tests I’m running, so it’s more of an ascetics thing. We’re building one traditional geodesic dome and one circle packing dome at work.
I’ve done geodesic domes before by starting with an icosohedron ans splitting the triangular faces, then projecting the new triangle vertices out onto the original sphere that all the points of the icosohedron lie on.
The more you divide the original icosohedron faces, the higher the resolution of the dome and the closer it is to representing a sphere.
Presumably, you are doing the same with a regular dodecahedron but splitting the pentagons into 5 triangles and projecting these new vertices onto the original sphere?
That’s the idea, not doing a great job of getting symmetry though. I ended up downloading Cadre Geo, a software for generating very precise geodesic structures, I’m trying to duplicate this feature in grasshopper now, counting unique segments, hubs and surfaces.
Wondering if there is a component like Remove Duplicate Curves but for finding the index of duplicate lengths rather than positions.
A big issue with creating more ambitious structures is the amount of unique parts skyrocket, need to find a balance.
Okay, Set Union was my huckleberry for finding duplicate data but it doesn’t give me the index of duplicate data, which would be helpful for construction drawings. One of my goals is to label and highlight the different duplicate (or close enough) components.
In this case, out of 250 struts we have 6 unique lengths.
@seghierkhaled Is it a crapshoot trying to rotate these to find an equator line to divide these symmetrically into domes? Each is going to be so unique, I’m assuming it’s more of a bake, explode, orient and bring back into gh maneuver?
See the gallery on this page. You can see the smaller, lower frequency domes are split below the equator giving just over a hemisphere and the larger, higher frequency domes are split above the equator giving just less than a hemisphere.
If you try and split them exactly on an equator then you just get loads more unique struts and nodes.
I never found a way of automatically finding the split line so you are probably right to bake the full dome, split it manually and then import it again until some genius works out a way to use Lunchbox’s Machine Learning components or something to do it for you