Just finished putting all the code together, there still might be some bugs hiding.
But here give it a try: http://snowshoe.f2o.org/static01.blend
How to animate?
- To animate the location and/or rotation of cube (particles) use the cube itself.
- To animate the location of the forcefield, use the empty called “AnimatedForce”
- You can also use the “AnimatedForce” to IPO-ize the Strength, Fall-off and MazDist of the force field.
- Ignore all other empties.
How to update?
- Just switch back and fourth the frame number.