how can i delete identical values in the same path

hi all,

i was playing with the new metaball component which is very interesting but it creates a lots of duplicates curves after moving them on different levels(some curves are unique and some others are not( Sometimes, i have 3 4 or 5 duplicates)). Is there a way to delete those dupicates from my tree.
i thought i could compare my resulting list with the same list using a shift but as i don't know how much duplicates i wil have, it's problematic!

Thanks for any replies !

ps: on my def snapshot, "metaball" is red due to a 0 value in my serie but it doesn't change my problem!

Attachments:

im1.jpg, 76 KB
im2.jpg, 167 KB
metaball.ghx, 197 KB

Replies to This Discussion

Permalink Reply by Yann on January 11, 2010 at 5:35pm

no one can help me?

Permalink Reply by Evan C on January 12, 2010 at 6:26am

i'm curious about this too... how to delete duplicate geometry.

it seems like it would be fairly easy with a scripting component, just call the rhino command SelDup then delete... but I'm lost when it comes to scripting.

Permalink Reply by David Rutten on January 12, 2010 at 7:02am

Metaballs aren't supposed to generate duplicate geometry, are you sure you've set it up correctly (i.e. are all the point charges in a single list?)

The only way I know to filter duplicate anything in Grasshopper, is to sort the data, and measure the distance between every item and its neighbour. If the distance is less than X units, then you've got a duplicate within tolerance.

In terms of duplicate curves I suppose you could try and measure length. Or, when the lengths aren't different enough, you could measure boundingbox-diagonals, or boundingbox corners.

But it won't be easy, and it definitely won't be fool-proof.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Yann on January 12, 2010 at 8:23am

Hello David,

I had a look again at my definition simplified to (x points connected to P, a serie of 10 values connected to T and 1 value for A and the Metaball component(threshod)) and the duplication increase when i increase A value. i tried grafting my serie but it doesn't change anything.

i allready tried to compare length (x) with the same list shifted by 1 (y) with f(x) = y, then dispatch into 2 lists but it doesn't give interesting resuts for the moment

Attachments: