Distributed points on surface

I'm sure I will kick myself but..

I've made a simple definition to create points on a surface. Then using power law forces between all the points and pull to surface.

Working perfectly on a sphere:

However on other surfaces, such as this lofted example, all the particles congregate at the corners..

I've attached the definition. Any ideas?

Attachments:

distribute on surface.gh, 8 KB

Replies to This Discussion

Permalink Reply by Daniel Piker on March 2, 2013 at 2:57pm

Hi Harri,

I've found that using an exponent of -1 for repulsion on an open surface does always tend to result in particles pushing to the edges like this. I think it is just the combined effect of all the particles acting over long distances.
The steeper falloff with an exponent of -2 works better, or even -3 or -4, though greater negative powers start requiring very small time steps.
But I think for getting an even distribution, better still is to use springs with cutoffs to simulate colliding spheres. The radius of the spheres might need adjusting a bit to get them to fill the surface, but you can do it with a slider.
Though if you want to fill the surface with a fixed target distance between adjacent points, you need to adjust the number of them, and until now this hasn't been easy to do in Kangaroo. The next release does contain a work in progress version of the remeshing stuff I wrote to tackle this problem though.

Permalink Reply by Harri on March 3, 2013 at 2:30pm