Select points by distance and group them 3 by 3

Hello,

I've found this method to select points by proximity here:

http://www.grasshopper3d.com/forum/topics/closest-point-sorting-see...

I'm trying to use it to obtain the two closes points fro every point of the first list, but the result is always "null". Can anyone tell me what is the problem?

The next step will be draw an arch between every group of 3 points, in order to have a profile made of arches.

In the attachment the files.

Thank you!!

Attachments:

PROVA PROXIMITY POINTS.3dm, 524 KB
PROVA PROXIMITY POINTS.gh, 70 KB

Replies to This Discussion

Permalink Reply by Matt Gaydon on October 9, 2014 at 4:55am

Can't open the code at the moment but think your after Closest Points component, that did not exist when the thread you linked to was created. This will let you input point to seach from, points to search and number of closest points to find.

Permalink Reply by Reino on October 9, 2014 at 5:03am

Hi Claudia,

I think this is what you are after. You forgot to put the points that you want to sort in the A-input. Also you should try to keep your Rhino-model much cleaner, it contains a lot of duplicate points. Therefore I used the 'Cull Duplicate' component, though still not all arcs look pretty.

Attachments:

PROVAPROXIMITYPOINTS_r.gh, 73 KB

Permalink Reply by Claudia on October 9, 2014 at 8:13am

The fact is that these points are the results of previous operations on grasshopper, but I've posted only the baked points to make the situation more clear.

Your solution is fine, I need to find a better path to obtain the starting points...that are still wrong in my definition..... Thank you!

Permalink Reply by Damon on October 9, 2014 at 8:49am

The way you get the points is very important in this case. It could be as easy as reading through the list, connecting points: 0-1-2, 2-3-4, 4-5-6, 6-7-0. If there are two lists, it would just require merging/weaving the lists together correctly first, then going through it in order.

Could you modify your diagram to explain how the list of points (or two lists of points) are ordered?

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