Metaballs around a set of points

Replies to This Discussion

Permalink Reply by MARIO VERGARA on February 26, 2013 at 5:39pm

can you post a rh4.0 file?

Permalink Reply by Maria Valente on February 27, 2013 at 3:57am

This is the Rhino 4.0 file

Attachments:

• initial lines 4.0.3dm, 115 KB

Permalink Reply by David Rutten on February 27, 2013 at 3:51am

The initial picture is a metaball that uses lines as inputs as well as points. The Grasshopper metaball component does not allow for that. I'm afraid I have no solution for you other than creating a boatload of very low weighted points along the lines which will drastically slow down your file.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Daniel Piker on February 27, 2013 at 4:25am

Back in the olden days before grasshopper had built in metaball components I used to make my own.

You can create a mesh height-field for the distance based potential then take sections.

It's easy enough to adapt this with a distance function from lines as well as points

Attachments:

• isolines.gh, 6 KB

Permalink Reply by Christian Schmidts on February 27, 2013 at 7:35am

good one!

Permalink Reply by RWNB on February 28, 2013 at 9:37am

something i did not understand.

can someone help me a little further.

thanks

Permalink Reply by Daniel Piker on February 28, 2013 at 10:16am

Hi RWNB,

Not sure why it isn't working, except perhaps if you set a different domain for your range, or have a very different size of input curves.

Did you actually download the file above or recreate it from the image ?

(I sometimes set values inside the inputs if I'm being lazy, instead of extracting the parameters or making a panel, but I realize this makes it not obvious just by looking where non-default inputs are being used)

anyway, here's the def with all input geometry internalized

Attachments:

• isolines2.gh, 6 KB

Permalink Reply by RWNB on February 28, 2013 at 10:33am

hi daniel,

i have not changed the gh definition.
maybe the problem lies in the input curves?

Attachments:

• Metaball.3dm, 16 KB
• isolines2.gh, 5 KB

Permalink Reply by djordje on February 28, 2013 at 10:41am

Hi Rassul,

Input the "1" into the "A" plug of the "Division" component.

Permalink Reply by RWNB on February 28, 2013 at 10:56am

thanks djordie!

Permalink Reply by Paul Goodship on February 28, 2013 at 8:00pm

Permalink Reply by Maria Valente on February 27, 2013 at 9:00am

Thank you for the input! very interesting approach!

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