2D- Population

Hello,

I think I have a kind of a simple question: I want to populate a 2D area with points randomly, but connected to 3 different distances from each point to another (like 5m, 7m and 15m) and grasshopper should define in the end by itselfe the total number of the points.

Any advises? Thanks!

Replies to This Discussion

Permalink Reply by David Rutten on November 10, 2017 at 9:41am

So the distance between each pair of closest points must be exactly 5, 7, or 15? How about the distance between a point and it's 2nd closest neighbour? 3rd closest? ...

Permalink Reply by Luftika Eudora on November 10, 2017 at 9:46am

Okey, so in the end i want to have a triangular grid in wich every point is either 5,7,15 m far away from every and each other point.

Permalink Reply by peter fotiadis on November 11, 2017 at 5:09am

See attached.

1. Plan A: Used the Proximity GH native stuff (that limits the search to a given max N of prox points) whilst it accepts min/max search radii.

2. Plan B: Some freaky thing (via code) that keeps searching until it finds all prox points that have distance >= min && <= max (from any point in the pList). Min max are derived by the dList values (after applying a percentage +/- increase). In order to help you to put the right search values it displays (red/green) the min/max distance found in your point collection.

NOTE: if the percentage (tolMargin parameter) is 0 then it searches distances that are between the max/min of your values in dList. You can add any additional value in the dList controlled via a slider.
)

Attachments:

ClosestConditionalPairs_6_V1.gh, 138 KB

Permalink Reply by peter fotiadis on November 12, 2017 at 1:43am

Added a searchMode option as follows:

dList (can contain any N of distinct values - same values are discarded) yields "domains" of search according the renamed domainControl slider (see Info panel). If is 0 the "domain" shrinks to a given dList value.

So searchMode 1 does a proximity search for each "domain" whilst searchMode 2 does a search for distances between the total min/max domains value. Depending on topology and dList values results may (or may not) differ.

Example: assume that you search proximity for 2, 4, 13 meters. Using the domainContol these "expand" to, say, 1.5-2.5, 3.5-4.5 and 12.5-13.5. Mode 1 finds prox distances within the 3 "domains" (excluding 2.5-3.5 and 4.5-12.5) whilst mode 2 finds distances within the 1.5-13.5 range.

Mind overlaps.

NOTE: David's excellent Populate thingy yields "even" distributions ... meaning that this may be not the ideal tool for that type of search.

Attachments: