Reactor points in 3d grid

Hi everyone,

Im trying to create a 3d grid of points with reactor points that affect the grid via repelling the grid points away.

Currently i have a flat plane on which the points do have a repelling effect, although cant figure out how to create a 3d grid to do this on.

Also I was wondering if it is possible to have these reactor points repel at different intensities on the same grid (ie to obtain different voumes).

Would be great if someone could post a grasshopper example or script we can use!

Ive attached the script im currently working off and rhino file.

Nikki.