This sketch models a crowd walking through a 2d realm and analyses which parts of the realm can be seen.

alt and dragg for zoom, shift and dragg for pan.
m or right click for menu.

start will start the simulation
store view will store the current view and makes it accessible throug pressing a number displayed in the top left corner
edit humans lets you add singel "humans" to the simulation
show attractors show/unshow attractors
edit attractors lets you add, delete or fill attractors. If attractors are set humans will walk and be released from these attractors, press "e" to delete marked attractor
analyse grid lets you set the size of the analyse grid. Smaller grids will need more computer power.
analyse stop/start the analyse
edit nodes for more complex realms you can edit a graph to help the humans find their way, press "e" to delete marked node
network size defines the distance new nodes connect to other nodes in the network
create network creates a random network connecting nodes according to the network size