Wangstshire
Left-click to cycle between vector fields.SWF
Source

Left-click to cycle between vector fields.
SWF

Source

https://dl.dropbox.com/u/12911987/Flash/Dvdt1.1.swf

If simulation runs slowly, press minus key on title screen to reduce starting planets.

Percolation model in Mathematica using weighted quick union

A N*N square starts out completely blocked (black). Locations are randomly unblocked (gray) until a water source from the top can traverse from the top to the bottom through adjacent unblocked locations, at which point the water has “percolated” through the square.

Wolfram Research: What do Wolfram Research employees, and Stephen Wolfram specifically, think of Quora?
Falling Sand Attempt One


Click empty grids to add sand and click filled grids to remove sand. Note that removing sand creates the same behavior as adding sand, only upside-down.

Falling Sand 24 fps (swf)

This implementation is too inefficient for a larger grid.

This is a good video to watch late at night if you have trouble sleeping.