Circle Packing defined by Points/Curves

Dear All,

I am wondering how I can do a circle packing initiated by attractors (pts/crvs).

I did a test one from a static grid and the circle sizes are controlled by the attractors. Then they would be packed. However, it is not exactly what I want to achieve. I also found a vb component from this forum, which does sort of the job but not completely.

I want to achieve something as the image I attached but fully packed within the boundary.

I have an idea that:

points could be emitted from the attractors, either points or curves, and circles will be created using these points as centroids. The further the emitted points, the bigger the circle will be. Then once the circles reach the boundaries they would bounce back.

I think in this way, after certain iterations, there might be a approximate solution that I am looking for. 

However, I don't really know how to script this fully. I need some help here! Please!

Best,
Yu