Populate 2D with different density based on attractor

Hello everyone!

i might have a simple question but i cannot find a way to solve it.

I have already searched the forum for solutions but i haven't quite find the answer.

As the title says, i have a surface with a population of points on it, and i would like to have those points arranged at different density based on attractor points (and later line attractors). i attach a simple hand-made screen of what i mean.

My ultimate aim,btw, is to have a double curved surface with a voronoi pattern on it, with different density of the cells (not the cell size, as i found in other posts), that's why i first need to create the voronoi base points based on attractors.

thanks

Attachments:

Capture_1.PNG, 28 KB

Replies to This Discussion

Permalink Reply by David Rutten on December 28, 2014 at 9:31am

There are several ways to approach this:

Generate a dense pattern all over, then remove points that are far away from attractors.
Generate a pattern, then move points towards attractors based on distance.
Generate the pattern with varying densities, then perhaps smooth out the points if the boundaries are too strong.
Generate a pattern on a 3D shape, then project it onto a 2D plane.
...

I'm sure there's lots of other ways. I attached examples of 1, 2 and 3.

Attachments:

Permalink Reply by Lorenzo Franceschini on December 29, 2014 at 3:23am

Hello David,

Thank you very much (as always) for your super fast reply! I got to use the 1st option of your, it best fits my needs.

Permalink Reply by AK_arch on June 18, 2016 at 9:12am

Hi David,

I'm trying to generate a custom frit pattern. The RemoveFarAwayPoints script above is as close as I've been able to get so far. (I'm admittedly a little new to GH!)

The end goal is the Frit 1 pattern attached. I've dabbled with your examples here:

http://www.grasshopper3d.com/forum/topics/how-to-change-a-point-gri...

...but couldn't get all the way there. Where are the black circles coming from in that definition?

The grid needs to be much tighter than what I'm getting in the image attached.

Any suggestions on the best way to do this?! Would really appreciate the help.

Attachments:

RemoveFarAwayPoints.PNG, 327 KB
FRIT 1.PNG, 69 KB

Permalink Reply by AK_arch on June 18, 2016 at 10:48am

Should have mentioned that I have a rendering deadline on Monday! :)

Permalink Reply by Hyungsoo Kim on June 18, 2016 at 1:08pm

Hi.

Not exactly the same look as your reference image, anyway, You can adjust the density of frit

pattern by using "Graph Mapper".

Attachments:

FritPattern_re.gh, 15 KB

Permalink Reply by AK_arch on June 18, 2016 at 2:24pm

Thank you so much!! This gets me a lot closer.

Follow up question if you don't mind.. is what's in the purple shaded region what's generating the square geometry of the mesh? I'm trying to figure out how to adjust the squares to be rectangles.

Permalink Reply by Hyungsoo Kim on June 18, 2016 at 2:40pm

Like this?

Attachments:

FritPattern_reV2.gh, 16 KB

Permalink Reply by Hyungsoo Kim on June 18, 2016 at 3:25pm

Another option is using "Random Reduce".

You'll need "Mesh Edit" plug-in.

Attachments:

FritPattern_reV3.gh, 14 KB

Permalink Reply by AK_arch on June 20, 2016 at 6:15am

Those are both very helpful. Thanks so much!

Permalink Reply by Denneil Sanders T. Sy on November 12, 2016 at 7:39am

Hi Hyungsoo, I'm just wondering if it is possible to create a gradual populate of points along a vertical curve? it is similar to what you've shown but oriented on a vertical axis?

Permalink Reply by Hyungsoo Kim on November 12, 2016 at 10:26am

You mean like this?

Permalink Reply by Denneil Sanders T. Sy on November 12, 2016 at 7:50pm

It's close to what I'm trying to achieve but the gradual population of points are originating from the point origin which is on the curve, it looks something like this but I can't figure out how to control the gradual population of points as it goes up.