Solid model to Voronoi

Replies to This Discussion

Permalink Reply by peter fotiadis on February 20, 2015 at 10:15am

That's easy using a variety of ways: post that solid.

Permalink Reply by peter fotiadis on February 20, 2015 at 11:16am

Until the solid arrives get this (I believe covers several cases) - I think that I've posted that already some time ago.

PS: Rhino file attached in case that GH fails to memorize internalized data (all test data are internalized).

Attachments:

• Thicken-wires-V1.3dm, 2.5 MB
• Thicken-wires-V1.gh, 1.1 MB

Permalink Reply by peter fotiadis on February 20, 2015 at 11:23am

Get this "simpler" test as well ("isolated" from the big one) - although not Voronoi related ... but "close".

Attachments:

• Thickened_dual_meshV2.3dm, 1.5 MB
• Thickened_dual_meshV2.gh, 1021 KB

Permalink Reply by Pablo J on February 20, 2015 at 2:03pm

Hi Peter. Many thanks for the quick answer and the inputs. Here I am uploading the solid model. In the meantime I am trying to use what you have added. 

Many thanks again.

Pablo.

Attachments:

• x1.stp, 273 KB

Permalink Reply by peter fotiadis on February 21, 2015 at 2:43am

OK, here we are:

Using the big one (thicken-wires-v1): Exo

and Cyto:

Easy don't you think so? (thanks to some very bright minds I must say). So we arrive into the tricky one (the 3rd option) - which would be my choice since the picks you've posted are "closer" to "rings" than voronoi "polys" :

In an ideal world  you should get something "similar" to this (all test data are "optimized" with MESHLAB):

but you don't ... since the 1m thing here is to create the "right" mesh (if you don't > garbage in == garbage out)

So ... here's my advice: if you like the 3rd option > GET ASAP MESHLAB (it's free) and spend some time in order to get the gist of that stunning product (yes I know: it's a bit "unstable", he he ... but is the best thing that happened to mankind if meshes are around):Of course you can use Modo as well (the best subdivision app around by a HUGE margin) in order to tame any mesh ... but Modo is complex and you need to invest a considerable amount of effort to master it.

PS: http://moczys.com/2014/03/30/mesh-manipulation-meshlab/

PS: Since MESHLAB it's free ... wonder why McNeil doesn't make some sort of agreement (but on the other hand Rhino is a nurbs oriented app). 

take care, Peter

Permalink Reply by peter fotiadis on February 21, 2015 at 3:04am

PS: forgot to mention that if you weld the mesh ... some far better results are made (with 3rd option) but the "homogenous" mesh issue is still dominant.

Permalink Reply by peter fotiadis on February 21, 2015 at 3:08am

Permalink Reply by peter fotiadis on February 21, 2015 at 9:59am

Spend a couple of minutes more on that one: here's what's doable with the 3rd option (the limitation factor being the size of the "interior" protrusion).

If I was you I would use an "envelope" brep (the "outline" that is)

best, Peter

Attachments:

• Thickened_dual_meshV2_PABLO_V1.3dm, 651 KB
• Thickened_dual_meshV2_PABLO_V1.gh, 1 MB

Permalink Reply by Kim hauer on February 22, 2015 at 11:03am

Dear Peter: Your level of how to use grasshopper clearly works for you but. You spend a lot of time trying to show how your sophisticated scripts can apply to other geometry. Unfortunately even with your explanation I don't get how to navigate your large complex script.
If I were instructing someone through "step by step" I would break the script into 2 or 3 manageable containers.
1. infuse the geometry with Voronoi particles (we have that already in the 1st post)
2. separate Voronoi particles in the geometry.
3. create choice: chose voids out of solids, which leaves Voronoi branches or retain the separated Voronoi particles
4. bake the branches, or bake the Voronoi particles, export .obj, import to Meshman > use Subdivision > Catmull-Clark or  Doo-Sabin

regardless, thanks for your input!

Permalink Reply by ng5 Alex on February 20, 2015 at 10:31am

this and this could

could be a helpful study too.

Permalink Reply by Kim hauer on February 22, 2015 at 7:32am

Topic related issue: With interest I noted that running the script once on each of the 2 letters.
The question arises How can I maintain the same density of Voronoi particles?
I presumed the changing Slider values would affect the Voronoi density, but they don't.

Attachments:

• HI.png, 102 KB

Permalink Reply by Hyungsoo Kim on February 22, 2015 at 7:47am

It's because the two letters have different volumes. so you should adjust the point numbers per each letter(pop Geometry component)

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