Using point attractor to pull/push other points.

Still new to Grasshopper and using fields & attractors. I'm trying to use several point attractors to pull other random points towards the attractors based strength by distance (simple enough, right?). I understand (kind of) how the point attractors can be used to modify the scale of circles, for example (like most basic tutorials show). However, I can't seem to get the random points to move towards the attractors properly. I'm sure it has to do with vectors and adding vectors, but I don't really understand how they work.

Thanks,

Attachments:

Field 1.gh, 8 KB

Replies to This Discussion

Permalink Reply by Marios Tsiliakos on March 1, 2013 at 10:18am

Hi,

if you are feeling lazy you can use my add-on Nudibranchwhich has embedded an automated multiple attractor component.

Please refer to the examples especially the point attractor one.

Permalink Reply by Mark Foxworth AIA, LEED AP on March 1, 2013 at 10:20am

Thanks, I'll give it a try.

Permalink Reply by kwanphil cho on May 7, 2013 at 10:57am

wow. Marios. It is really impressive. Espeically reaction and diffusion part. Thanks a lot for the good work.

Permalink Reply by Marios Tsiliakos on May 7, 2013 at 2:03pm

Thank you for the feedback.

There is going to be a major update on Nudibrach (hopefully soon :) ), that deals with bug fixes and also introduces a few new components.

Best,

Permalink Reply by STANLEY SCHULTZ on May 7, 2013 at 8:55am

Hi, I just found this discussion. I am pretty much in the exact same position as mark was. I looked at nudibranch, but I have no idea how it works. I am dealing with a surface that I have applied a popgeo battery. I cant really figure out how to use attractor points or curves to create a swarms of density in isolated areas.

Thanks

Attachments:

130507_Study.3dm, 834 KB
points.gh, 2 KB

Permalink Reply by Mark Foxworth AIA, LEED AP on May 7, 2013 at 9:06am

Stanley,

I haven't had a chance to look at your files, and this might not work for what you are doing, but I had some luck (with varying results) by grouping points by proximity to the attractor point(s). Once grouped, I could move the point towards the attractor using a two point vector and some math.

To really get the result I wanted (again this might not work for your purposes), I ended up using a random cull by distance to the attractor point(s) and bumping the original point count way up. The result gave me a clumpiness of points that dispersed by distance.

Permalink Reply by STANLEY SCHULTZ on May 7, 2013 at 9:25am

Thanks Mark, Would you happen to have a definition I could look at? I am still pretty new to all this and dont entirely understand how everything works.

Permalink Reply by Mark Foxworth AIA, LEED AP on May 7, 2013 at 9:50am

Stanley,

I don't have anything here with me now (I'm at work) but I'll post some definitions tonight when I get home. If you don't here back from me, send me a reminder. In the meantime, check out this link and see if it helps at all. This is what I used to learn the grouping technique.

http://formularch.blogspot.com/2012/04/gh-distance-grouping.html

Permalink Reply by STANLEY SCHULTZ on May 7, 2013 at 9:52am

Great thanks mark! I'll check this out.

Permalink Reply by Michael Pryor on May 7, 2013 at 10:51am