Hi Andrew,

I come to you because regards your circle packing def. I have been trying to achieve a similar effect to this one of the link for my final academic project,

i have been working on a definition by Daniel Piker definition(http://www.grasshopper3d.com/group/kangaroo/forum/topics/circle-pak... ) and I manage to work out how to used with springs system with circle packing logic's, and adapted it with the image field to define the Radii's but the recursive adaptation of the radiis I have been trying to achieve it with "Hopsnake" after kangaroo run's the simulation so then it can re-adapt the circle radiis (and rest lenght) but my system runs out of memory :s.....,my main target is to optimize the radii for a better arrangement and population within the image-field allowing the radii to change and adapt during the simulation... some one posted in Youtube a great video where they show this plus other interesting packing logic's....

to be more specific I'm looking into the example of "Fight for space" in the video

here is the link:

Packing Algorithms in Rhino + Grasshopper

any type of advice or guidance  to approach this would be great and extremely grateful thanks for you time.....