Creating 3d Voronoi Skeleton

Hi,

I created a 3D voronoi block from a point cloud and am now trying to figure out how to create the script to turn the voronois into a skeleton like the picture below. I realize the script must be somewhere in one of these discussion forums, but I've had no luck with finding it yet. Any help would be appreciated. Thanks.

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Permalink Reply by RWNB on March 30, 2012 at 8:31am

http://www.grasshopper3d.com/forum/topics/skeletal-mesh

Permalink Reply by Hannes Löschke on March 30, 2012 at 11:51am

Okay... T-Splines is nice but not actually free :D ...that is if you are not a student and have access to students.autodesk.com

The constuction of the example is pretty simple actually.

- explode all cells

- extract the edges of the faces (+ join them)

- extract the vertices of the edges

- feed the vertices as control points to closed, periodic NURBS curve.

- loft from face edges to NURBS-Version (you might need to adjust the seams between polyline and NURBS curve in some cases.)

voila

Permalink Reply by taz on March 30, 2012 at 12:15pm

And the picture came from:

http://matsysdesign.com/category/projects/voronoi-morphologies/

Please cite sources!

Also:

http://www.grasshopper3d.com/forum/topics/3d-vonoroi-in-a-bounding-box

Permalink Reply by Andrew Kudless on March 30, 2012 at 12:17pm

Thanks Taz!

Permalink Reply by taz on March 30, 2012 at 12:23pm

It's the source!

Permalink Reply by taz on March 30, 2012 at 12:33pm

BTW did you see this project?

http://www.designboom.com/weblog/cat/10/view/20123/walter-jack-stud...

The fluidity reminded me of your P-Wall casts, but some of the folds in that concrete are wicked.

Permalink Reply by Andrew Kudless on March 30, 2012 at 4:43pm

Yeah, a friend showed that to me a couple weeks ago. Pretty amazing. I'd love to see the formwork for it. My worry is that there is a huge amount of CNC milled foam lurking behind this project.

Permalink Reply by taz on March 30, 2012 at 6:03pm

Yeah, probably very sacrificial foam...

Permalink Reply by Mateusz Zwierzycki on March 30, 2012 at 6:45pm

You're someone who will probably know answer to my question :)

If I would mill the foam (XPS aka styrodur (polish market)) what I need to apply on milled surface to use it as formwork ?

Another one : I use universal putty for milled xps finishing (this time used as model, not formwork), do you know something better than putty ? Better = easier/faster to finish

Permalink Reply by Andrew Kudless on March 31, 2012 at 12:08pm

Hi Mateusz,

I actually don't know too much about casting concrete against foam. The P_Wall projects that I have done I have cast plaster against fabric and it worked great. I have also cast concrete against silicone rubber and that is very good finish but the silicone is expensive. I have also know some people here (Kreysler & Associates) who mill cheap EPS foam 1cm BELOW the final surface, put 2cm of plaster on the milled foam, and then remill the plaster back down to the final surface. This gives a very high resolution plaster surface that can be used to cast fiberglass against. I imagine the same would work for concrete but you might want to wax the plaster surface first.

Permalink Reply by RWNB on March 31, 2012 at 11:46am

hi andrew,

is there a possibility to know
more about this project?
love it! please reply. :-)

http://matsysdesign.com/category/projects/aldgate-aerial-park/

Permalink Reply by Andrew Kudless on March 31, 2012 at 12:21pm

Hi RWNB,

There's not too much to know. It was a very fast competition project (2-3 days) that I did a couple of years ago. The competition brief called for a new gate on the site of London's Aldgate (Old Gate) to commemorate the recent development of East London for the Olympics. I thought that putting a gate up to celebrate the connection between two communities (The City & East London) was a bit too binary. If the goal was to celebrate a new, more inclusive London, putting up a gate (which by definition signifies 2 sides) was the wrong tactic.

So, instead of a simple, singular, passive gate separating the two sides, I decided to create a more complex, multiple, inhabitable network of gates that create both an area of shelter for markets, protests, etc below and a series of amphitheatres, hills, and grassy patches above. So rather than creating a space of division (you are either on this side or that side of a gate), the "New Aldgate" would be a space of community and inclusiveness.

On the technical side, it was actually the first project that I did completely in Grasshopper (handrails, stairs, wood decking pattern, everything). I'm glad you liked it. Right before submitting, I reread the requirements and saw that you had to be a registered architect in the UK (which I am not) so we never actually submitted for the competition. That was probably all for the best considering the winning proposal. The judges were clearing looking for something more minimal and gate-like.